CN115254203A

CN115254203A - Double-column series-connection circulation alternate continuous operation ion exchange system

Info

Publication number: CN115254203A
Application number: CN202210560319.4A
Authority: CN
Inventors: 郑宏; 郑泽邻
Original assignee: Nanjing Linehome Environmental Technology Co ltd
Current assignee: Nanjing Linehome Environmental Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-11-01

Abstract

The invention discloses a double-column series-connection circulation alternate continuous operation ion exchange system, which mainly realizes the circulation alternate switching between independent operation and series operation of resin columns through the design of a plurality of pipelines, a plurality of valves and online control, and realizes the uninterrupted work of adsorption separation, regeneration, cleaning and the like by adopting online detection control.

Description

Double-column series-connection circulation alternate continuous operation ion exchange system

Technical Field

The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to a double-column series-connection circulation alternate continuous operation ion exchange system.

Background

The ion exchange resin technology is widely applied to industries such as industrial wastewater treatment, metallurgy, chemical industry, metal processing, electronics, electric power, food, pharmacy and the like. In the process of deeply removing pollutants or recycling pollutants in industrial wastewater treatment, when resources are enriched and recycled or feed liquid is purified by removing impurities in metallurgy and other industries, an ion exchange method is often adopted, because a single ion exchange resin column can leak when an adsorption target object reaches about 50% of the volume of a resin bed, in order to ensure that the target object does not leak into water after crossing in the operation process, a traditional ion exchange system generally adopts a 2-column series system, namely a 1 st-column leaked target object is continuously adsorbed by a 2 nd column, when the 2 nd column leaks, 2 exchange columns are regenerated, if the continuous operation is required, two sets of 2-column series systems are generally adopted to alternately operate, therefore, if the continuous operation needs 4 exchange columns, two sets of pipelines and an online detection system, and 2 resin columns are required to be regenerated and cleaned simultaneously, the utilization rate of the resin is lower, and the operation and investment costs are higher.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The object of the present invention is to provide a dual column series cycle alternating continuous operation ion exchange system, overcoming the above-mentioned drawbacks of the prior art. In order to achieve the above-mentioned objects,

a double-column series circulating alternate continuous operation ion exchange system (see attached figure 1) is mainly composed of a raw water pool, a water inlet pump, a TI-T5 online detector, 1-30 valves, pipelines and three ion exchange columns (filled with ion exchange resin, hereinafter referred to as resin) which are connected through the pipelines, and is characterized in that: the raw water pool is connected with the upper part of an ion exchange column 1 (column 1 for short) through a water inlet pump, a T1 online detector (T1 for short), a pipeline, a valve 1 and an upper connecting pipe 1, the bottom of the column 1 is connected with the upper part of an ion exchange column 2 (column 2 for short) through a lower connecting pipe 1, a valve 2, a T2 online detector (T2 for short), a pipeline, a valve 11 and an upper connecting pipe 2, and the bottom of the column 2 is connected with a post-cross water treatment system through a lower connecting pipe 2, a valve 6, a T3 online detector (T3 for short) and a pipeline.

The raw water pool is connected with the upper part of the column 2 through a water inlet pump, a T1, a pipeline, a valve 4 and an upper connecting pipe 2; the bottom of the column 2 is connected with the upper part of an ion exchange column 3 (column 3 for short, the same below) through a lower connecting pipe 2, a valve 5, a T2, a pipeline, a valve 12 and an upper connecting pipe 3, and the bottom of the column 3 is connected with a water treatment system after cross-linking through the lower connecting pipe 3, the valve 9, the T3 and the pipeline;

the raw water pool is connected with the upper part of the column 3 through a water inlet pump, a T1, a pipeline, a valve 7 and an upper connecting pipe 3; the bottom of the column 3 is connected with the upper part of the column 1 through the lower connecting pipe 3, the valve 8, the valve 2, the pipeline and the valve 10 and the upper connecting pipe 1, and the bottom of the column 1 is connected with the post-treatment water treatment system through the lower connecting pipe 1, the valve 3, the valve T3 and the pipeline.

A regenerant, a transforming agent or countercurrent column washing water is connected with the column 1 through a pipeline, a valve 14 and the lower connecting pipe 1; the downstream column washing water is connected with the column 1 through a pipeline, a valve 13 and an upper connecting pipe 1. The resin regenerated liquid (called regenerated liquid for short, the same below) is sent to a regenerated liquid treatment system through an upper connecting pipe 1, a valve 15, a pipeline and a T5; the resin transformed liquid (transformed liquid for short, the same below) and the countercurrent column washing wastewater enter a column washing wastewater treatment system through an upper connecting pipe 1, a valve 17, a pipeline and a T4; the downstream column washing wastewater passes through the lower connecting pipe 1, the valve 16, the pipeline and the T4 to a column washing wastewater treatment system; the raw water in the column 1 returns to the raw water pool through the upper connecting pipe 1, the valve 28 and the pipeline.

The regenerant, the transforming agent or the countercurrent column washing water is connected with the column 2 through a pipeline, a valve 19 and a lower connecting pipe 2; the downstream column washing water is connected with the column 2 through a pipeline, a valve 18 and an upper connecting pipe 2. Resin regeneration liquid is sent to a regeneration liquid treatment system through an upper connecting pipe 2, a valve 20, a pipeline and T5; the resin transformation liquid and the countercurrent column washing wastewater enter a column washing wastewater treatment system through an upper connecting pipe 2, a valve 22, a pipeline and T4; the downstream column washing wastewater passes through the lower connecting pipe 2, the valve 21, the pipeline and the T4 to a column washing wastewater treatment system; the raw water in the column 2 returns to the raw water pool through the upper connecting pipe 2, the valve 29 and the pipeline.

A regenerant, a transformation agent or countercurrent column washing water is connected with the column 3 through a pipeline, a valve 24 and a lower connecting pipe 3; the downstream column washing water is connected with the column 3 through a pipeline, a valve 23 and an upper connecting pipe 3. The resin regeneration liquid is sent to a regeneration liquid treatment system through an upper connecting pipe 3, a valve 25, a pipeline and a T5; the resin transformation liquid and the countercurrent column washing wastewater enter a column washing wastewater treatment system through an upper connecting pipe 3, a valve 27, a pipeline and T4; smoothly washing column wastewater to a column washing wastewater treatment system through a lower connecting pipe 3, a valve 26, a pipeline and T4; the raw water in the column 3 returns to the raw water pool through the upper connecting pipe 3, the valve 30 and the pipeline. 2. The dual column series cycle alternating continuous operation ion exchange system of claim 1, wherein: the pipeline of the valve 1, the valve 10, the valve 13, the valve 15, the valve 17 and the valve 28, which is communicated with the upper part of the column 1, is an upper connecting pipe 1, and the pipeline of the valve 2, the valve 3, the valve 14 and the valve 16, which is communicated with the bottom of the column 1, is a lower connecting pipe 1.

The pipeline of the valve 4, the valve 11, the valve 18, the valve 20, the valve 22 and the valve 29 which is communicated with the upper part of the column 2 is an upper connecting pipe 2, and the pipeline of the valve 5, the valve 6, the valve 19 and the valve 21 which is communicated with the bottom of the column 2 is a lower connecting pipe 2.

The pipeline of the valve 7, the valve 12, the valve 23, the valve 25, the valve 27 and the valve 30 communicated with the upper part of the column 3 is an upper connecting pipe 3, and the pipeline of the valve 8, the valve 9, the valve 24 and the valve 26 communicated with the bottom of the column 3 is a lower connecting pipe 3.

Further optimally, raw water in the raw water pool enters the upper part of the column 1 through the water inlet pump, the pipeline, the T1, the valve 1 and the upper connecting pipe 1, enters the upper part of the column 2 from the lower connecting pipe 1, the valve 2, the T2, the pipeline, the valve 11 and the upper pipeline 2 at the bottom of the connecting column 1 after passing through the resin layer in the column 1, and is discharged to a post-treatment water treatment system from the lower connecting pipe 2, the valve 6, the T3 and the pipeline at the bottom of the connecting column 2 after passing through the resin layer in the column 2;

raw water in a raw water pool enters the upper part of a column 2 through a pump 1, a pipeline, a T1, a valve 4 and an upper connecting pipe 2, enters the upper part of the column 3 from a lower connecting pipe 2, a valve 5, a T2, a pipeline, a valve 12 and an upper connecting pipe 3 at the bottom of a connecting column 2 after passing through a resin layer in the column 2, and is connected with a lower connecting pipe 3, a valve 9, a T3 and a pipeline at the bottom of the column 3 after passing through the resin layer in the column 3 and then is discharged to a post-cross water treatment system;

raw water in the raw water pool enters the upper part of the column 3 through the pump 1, the pipeline, the T1, the valve 7 and the upper connecting pipe 3, passes through the resin layer in the column 3, enters the upper part of the column 1 from the lower connecting pipe 3, the valve 8, the T2, the pipeline, the valve 10 and the upper connecting pipe 1 at the bottom of the connecting column 3, after passing through the resin layer in the column 1, the water is discharged from the lower connecting pipe 1 at the bottom of the connecting column 1, the valve 3, the valve T3 and the pipeline to a post-cross water treatment system;

the regenerant enters the column 1 through the pipeline, the valve 14 and the lower connecting pipe 1, and the resin regenerated liquid is sent to a regenerated liquid treatment system through the valve 15, the pipeline and the T5; the transforming agent enters the column 1 through the pipeline, the valve 14 and the lower connecting pipe 1, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 17, the pipeline and the T4; the countercurrent column washing water enters the column 1 through the pipeline, the valve 14 and the lower connecting pipe 1, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17, the pipeline and the T4; the downstream column washing water enters the column 1 through the pipeline, the valve 13 and the upper connecting pipe 1, and the downstream column washing wastewater enters a column washing wastewater treatment system through the lower connecting pipe 1, the valve 16, the pipeline and the T4; the raw water in the column 1 returns to the raw water pool through the upper connecting pipe 1, the valve 28 and the pipeline.

The regenerant enters the column 2 through a pipeline, a valve 19 and a lower connecting pipe 2, and the resin regenerant is sent to a regenerant treatment system through a valve 20, a pipeline and T5; the transforming agent enters the column 2 through the pipeline, the valve 19 and the lower connecting pipe 2, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 22, the pipeline and the T4; the countercurrent column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22, the pipeline and the T4; the downstream column washing water enters the column 2 through the pipeline, the valve 18 and the upper connecting pipe 2, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21, the pipeline and the T4; the raw water in the column 2 returns to the raw water pool through the upper connecting pipe 2, the valve 29 and the pipeline.

The regenerant enters the column 3 through the pipeline, the valve 24 and the lower connecting pipe 3, and the resin regenerant is sent to a regenerant treatment system through the valve 25, the pipeline and the T5; the transforming agent enters the column 3 through the pipeline, the valve 24 and the lower connecting pipe 3, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 3, the valve 27, the pipeline and the T4; the countercurrent column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27, the pipeline and the T4; the downstream column washing water enters the column 3 through the pipeline, the valve 23 and the upper connecting pipe 3, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26, the pipeline and the T4; the raw water in the column 3 returns to the raw water pool through the upper connecting pipe 3, the valve 30 and the pipeline.

Further optimized, the system comprises 3 subsystems, namely (1) a double-column alternate series continuous operation system consisting of a water inlet pump, valves 1 to 9 and corresponding pipelines; (2) The online detection system consists of valves and corresponding pipelines of online detectors T1-T5 and 10-12; (3) The resin regeneration cleaning system consists of valves 13-30 and corresponding pipelines.

A double-column series circulating alternate continuous operation ion exchange system is characterized in that: the column 1, the column 2 and the column 3 are filled with corresponding different resins according to different target objects contained in the recovered or removed raw water, and the operation principle and the steps are as follows:

(1) And (3) starting operation: opening the valve 1, the valve 2, the valve 11 and the valve 6, allowing raw water to enter the column 1 through the TI, the valve 1 and the upper connecting pipe 1 at a set flow rate, and after passing through a resin layer in the column 1, allowing the raw water to enter the column 2 through the lower connecting pipe 1, the valve 2, the T2, the valve 11 and the upper connecting pipe 2; and then passes through a resin layer of the column 2 and is discharged through a lower connecting pipe 2, a valve 6 and a T3 to become a water treatment system for water after cross-linking, and the system runs in a way that the column 1 and the column 2 are connected in series and flow-downstream.

The target substance (including but not limited to metal ion, inorganic and organic ion, metal complex, etc., and the target substance can be 1 or more) in the raw water is firstly adsorbed by the resin in the column 1, the target substance which is not completely adsorbed by the resin in the column 1 or the target substance which leaks from the column 1 is continuously adsorbed by the resin in the column 2, the content of the target substance in the water after the cross-linking is ensured not to exceed the set value, and the recovery or removal rate is ensured. In the operation process, the content of a target object in raw water is detected in advance by an online detector T1 (T1 for short), the raw water passes through a column 1, then the content of the target object in the raw water is detected by an online monitor T2 (T2 for short), then the raw water enters the column 2, as the saturation of the raw water is gradually increased as the resin in the column 1 adsorbs the target object more and more, the target object which is not adsorbed or leaked in the raw water is also gradually increased, and therefore the detection value C of the T2₂Rises and gradually approaches the T1 detection value C₁When C is present₂/C₁Or (C)₁-C₂)/C₁Reaches a set value M₁(M₁Values generally in the range of 0.5 to 1.0 or 0.5 to 0) indicate that the resin is nearly saturated in column 1, M₁The value is set according to the content of the target substance in the raw water, the time required for the resin circulation saturation, the time required for the resin regeneration and cleaning, and the like. In the subsequent step, the online detection and control principles of the serial operation of the columns 2 and 3 and the columns 3 and 1 are the same.

(2) Series column switching 1: when the column 1 and the column 2 are operated in series to M in the step (1)₁The value reaches the set value, which indicates that the resin in the column 1 is nearly saturated with the target substance in the raw water, the valves 1, 2, 11 and 6 are closed, the valves 4, 5, 12 and 9 are opened, and the raw water enters the column through the pump 1, TI, valve 4 and the upper connecting pipe 22, after passing through the resin layer in the column 2, the wastewater enters the column 3 through the lower connecting pipe 2, the valve 5, the T2, the valve 12 and the upper connecting pipe 3, passes through the resin layer in the column 3, and is discharged to a post-treatment water treatment system through the lower connecting pipe 3 and the valve 9; at this point the system switches to series forward flow operation of column 2 and column 3.

(3) Recovery of raw water in column 1 and resin washing before regeneration: a) If the raw water in the column 1 needs to be controlled, when the valves 1, 2, 11 and 6 are closed in the step (2), the valves 14 and 28 are opened, the column washing water enters the column 1 through the valves 14 and the lower connecting pipe 1 at a set flow rate, the raw water in the column 1 is ejected by the column washing water and returns to a raw water pool for recycling through the upper connecting pipe 1 and the valve 28, when the column washing water enters the set amount, the raw water in the column 1 is ejected by the column washing water, the valves 28 are closed, the valve 17 is opened, the column washing water continuously washes the resin in a counter-current manner, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 1, the valves 17 and the T4, when the column washing water enters the set amount, the column washing water is stopped, and the resin in the column 1 is thoroughly cleaned and then starts to be regenerated in the next step; b) If the raw water in the column 1 is recycled, the content of the components in the raw water does not need to be controlled, when the valve 1, the valve 2, the valve 11 and the valve 6 are closed in the step (2), the valve 14 and the valve 28 are opened, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 1 and the valve 28, when the column washing water reaches a set amount, the column washing water is stopped to enter, the valve 28 is closed, and the next step of regeneration is started after the resin in the column 1 is thoroughly cleaned.

(4) Regeneration of resin in column 1: a) If the content of a target object in the regeneration liquid needs to be controlled, the valve 17 is opened, a quantitative regenerant enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, column washing water in the column 1 is ejected by the regeneration liquid, passes through the upper connecting pipe 1, the valve 17 and the T4, is detected by the T4, and then goes to a column washing water treatment system, when the detection value of the T4 reaches a set value, the column washing water in the column 1 is completely ejected by the regeneration liquid, the valve 17 is closed, the valve 15 is opened, and the regeneration liquid in the column 1 goes to the regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5; b) If the content of the target object in the regeneration liquid is not required to be controlled, the valve 15 is opened, a quantitative regenerant enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, and the regeneration liquid in the column 1 is sent to a regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5.

When the regenerant entering the column 1 reaches a set value, the regenerant is stopped to enter, column washing water enters the column 1 again through the valve 14 and the lower connecting pipe 1, the regenerant in the column 1 is ejected out of the upper connecting pipe 1, the valve 15 and the T5 and is discharged into the regenerant treatment system after being detected by the T5, the detection value of the T5 is continuously changed along with the continuous ejection of the regenerant in the column 1 by the column washing water, when the detection value of the T5 reaches a set value, the regenerant is ejected completely by the column washing water, the valve 15 is closed, the valve 17 is opened, the column washing wastewater enters the column 1 through the upper connecting pipe 1, the valve 17 and the T4 and is continuously washed by the resin in a countercurrent mode, when the column washing water reaches the set value, the valve 14 and the valve 17 are closed, the valve 13 and the valve 16 are opened, the column washing water enters the column 1 through the valve 13 and the upper connecting pipe, then enters the column washing wastewater treatment system through the lower connecting pipe 1, the valve 16 and the T4 and the column washing wastewater treatment system after being detected by the lower connecting pipe 1, the valve 16 and the resin washing water is stopped, and the resin washing valve 13 and the regeneration valve is closed, and the resin washing is stopped. The detection control principle of the regeneration and cleaning of the resin in the column 2 and the column 3 in the subsequent step is the same.

(5) Resin transformation in column 1: when the valve 13 and the valve 16 are closed in the step (4), the valve 14 and the valve 17 are opened, a quantitative transforming agent enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 1 to reach a set amount, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1, then goes to the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, when the column washing water reaches the set amount, the valve 14 and the valve 17 are closed, the valve 13 and the valve 16 are opened, the column washing water enters the column 1 through the valve 13 and the upper connecting pipe, then goes to the column washing wastewater treatment system through the lower connecting pipe 1, the valve 16 and the T4 and is detected by the T4, when the detection value of the T4 reaches the set value, the resin washing in the column 1 is finished, the column washing water stops, the valve 13 and the valve 16 are closed, the resin transforming and the resin washing step is not required. After resin regeneration, transformation and washing are completed, column 1 waits for the next switch. The detection control principle of the transformation and cleaning of the column 2 and the column 3 in the subsequent step is the same.

(6) Series column switching 2: when the column 2 and the column 3 in the step (2) are operated in series to M₁When the value reaches a set value, indicating that the resin in the column 2 adsorbs a target object in raw water and is close to saturation, closing the valve 4, the valve 5, the valve 12 and the valve 9, opening the valve 7, the valve 8, the valve 10 and the valve 3, enabling the raw water to enter the column 3 through the pump 1, the TI, the valve 7 and the upper connecting pipe 3, enabling the raw water to enter the column 1 through the resin layer in the column 3, enabling the raw water to pass through the lower connecting pipe 3, the valve 8, the valve 2, the valve 10 and the upper connecting pipe 1, enabling the raw water to pass through the resin layer in the column 1, and enabling the raw water to be discharged out of the lower connecting pipe 1 and the valve 3 to a post-cross water treatment system; at this point the system switches to series concurrent operation of column 3 and column 1.

(7) Recovery of raw water in column 2 and resin washing before regeneration: a) If the raw water in the column 2 is recovered, the content of the components in the raw water needs to be controlled, when the valve 4, the valve 5, the valve 12 and the valve 9 are closed in the step (6), the valve 19 and the valve 29 are opened, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, the raw water in the column 2 is ejected out by the column washing water and returns to a raw water pool for recovery through the upper connecting pipe 2 and the valve 29, when the column washing water reaches a set amount, the raw water in the column 2 is ejected out by the column washing water, the valve 29 is closed, the valve 22 is opened, the column washing water continuously carries out countercurrent washing on the resin, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, when the column washing water reaches the set amount, the column washing water stops entering, and the resin in the column 2 is thoroughly cleaned, and then the next step of regeneration is started; b) If the raw water in the column 2 is recycled, the content of the components in the raw water does not need to be controlled, when the valve 4, the valve 5, the valve 12 and the valve 9 are closed in the step (6), the valve 19 and the valve 29 are opened, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, the resin in the column 2 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 2 and the valve 29, when the column washing water inlet reaches a set amount, the column washing water is stopped to enter, the valve 29 is closed, and the resin in the column 2 is thoroughly cleaned and then starts to be regenerated in the next step.

(8) Regeneration of resin in column 2: a) If the content of the target object in the regeneration liquid needs to be controlled, the valve 22 is opened, a quantitative regeneration agent enters the column 2 through the valve 19 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, the regeneration liquid ejects out the column washing water in the column 2 and goes to a column washing water treatment system through the upper connecting pipe 2, the valve 22 and the T4, when the detection value of the T4 reaches a set value, the column washing water in the column 2 is completely ejected out by the regeneration liquid, the valve 22 is closed, the valve 20 is opened, and the regeneration liquid in the column 2 goes to the regeneration liquid treatment system through the upper connecting pipe 2, the valve 20 and the T5; b) If the content of the target object in the regeneration liquid is not required to be controlled, the valve 20 is opened, a quantitative regenerant enters the column 2 through the valve 19 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, and the regeneration liquid in the column 2 is sent to a regeneration liquid treatment system through the upper connecting pipe 2, the valve 20 and the T5.

When the regenerant entering the column 2 reaches a set value, the regenerant is stopped to be fed, column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2 again, the regenerant in the column 2 is pushed into the regenerant treatment system through the upper connecting pipe 2, the valve 20 and the T5, when a T5 detection value reaches the set value, the valve 20 is closed, the valve 22 is opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, when column washing water enters the set value, the valve 19 and the valve 22 are closed, the valve 18 and the valve 21 are opened, column washing water enters the column 2 through the valve 18 and the upper connecting pipe 2, then the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21 and the T4, when the detection value of the T4 reaches the set value, the column washing water stops to enter, the valve 18 and the valve 21 are closed, and resin regeneration and cleaning are finished.

(9) Resin transformation in column 2: when the valve 18 and the valve 21 are closed in the step (8), the valve 19 and the valve 22 are opened, the quantitative transforming agent enters the column 2 through the valve 19 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, the transforming agent stops entering the column 2 after the transforming agent enters the column 2 to reach a set amount, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, then goes to the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, when the column washing water reaches the set amount, the valve 19 and the valve 22 are closed, the valve 18 and the valve 21 are opened, the column washing wastewater enters the column 2 through the valve 18 and the upper connecting pipe 2, then goes to the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21 and the T4, and when the detection value of the T4 reaches a set value, the column washing water stops entering, the valve 18 and the valve 21 are closed, and the transformation and the resin washing are finished; after resin regeneration, transformation and cleaning is complete, column 2 waits for the next switch.

(10) Column switching in series 3: when the column 3 and the column 1 are operated in series to M in the step (6)₁The value reaches the set value, which indicates that the resin in the column 3 is nearly saturated with the target substance in the raw water, the valves 7, 8, 10 and 3 are closed, and the step (1) is carried outThe column 1 and the column 2 are switched to be in series connection and downstream operation;

(11) Recovery of raw water in column 3 and resin washing before regeneration: a) If the raw water in the column 3 needs to be controlled, when the valves 7, 8, 10 and 3 are closed in the step (10), the valves 24 and 30 are opened, the column washing water starts to enter the column 3 through the valves 24 and the lower connecting pipe 3, the raw water in the column 3 returns to a raw water tank through the upper connecting pipe 3 and the valves 30, when the column washing water reaches a set amount, the raw water in the column 2 is completely ejected out by the column washing water, the valves 30 are closed, the valves 27 are opened, the column washing water continuously washes the resin in a counter-current manner, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 3, the valves 27 and T4, when the column washing water reaches the set amount, the column washing water is stopped, and the resin in the column 3 is thoroughly washed and then starts to be regenerated in the next step; b) If the raw water in the column 3 is recovered, the content of the components in the raw water does not need to be controlled, when the valve 7, the valve 8, the valve 10 and the valve 3 are closed in the step (10), the valve 24 and the valve 30 are opened, the column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, the resin in the column 3 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 3 and the valve 30, when the column washing water inlet reaches a set amount, the column washing water is stopped to enter, the valve 30 is closed, and the resin in the column 3 is completely cleaned and then is regenerated.

(12) Regeneration of resin in column 3: a) If the content of the target object in the regeneration liquid needs to be controlled, the valve 27 is opened, a quantitative regenerant enters the column 3 through the valve 24 and the lower connecting pipe 3 at a set flow rate, column washing water in the column 3 enters a column washing water treatment system through the upper connecting pipe 3, the valve 27 and the T4, when a detection value of the T4 reaches a set value, the valve 27 is closed, the valve 25 is opened, and the regeneration liquid in the column 3 enters the regeneration liquid treatment system through the upper connecting pipe 3, the valve 25 and the T5; b) If the content of the target object in the regeneration liquid is not required to be controlled, the valve 25 is opened, a quantitative regenerant enters the column 3 through the valve 24 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is regenerated, and the regeneration liquid in the column 3 is sent to a regeneration liquid treatment system through the upper connecting pipe 3, the valve 25 and the T5;

when the regenerant entering the column 3 reaches a set value, the regenerant is stopped to enter, column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3 again, the regenerant in the column 3 is jacked into the regenerant treatment system through the upper connecting pipe 3, the valve 25 and the T5, when a T5 detection value reaches the set value, the valve 25 is closed, the valve 27 is opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, when the column washing water enters the set value, the valve 24 and the valve 27 are closed, the valve 23 and the valve 26 are opened, the column washing water enters the column 3 through the valve 23 and the upper connecting pipe 3, then enters the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26 and the T4, when the detection value of the T4 reaches the set value, the column washing water stops entering, the valve 23 and the valve 26 are closed, and resin regeneration and cleaning are finished.

(13) Transformation of resin in column 3: when the valve 23 and the valve 26 are closed in the step (12), the valve 24 and the valve 27 are opened, the quantitative transforming agent enters the column 3 through the valve 24 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 3 to reach a set amount, the column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3 and then goes to the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, when the column washing water reaches the set amount, the valve 24 and the valve 27 are closed, the valve 23 and the valve 26 are opened, the column washing wastewater enters the column 3 through the valve 23 and the upper connecting pipe 3 and then goes to the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26 and the T4, and when the detection value of the T4 exceeds the set value, the column washing water stops entering, the valve 23 and the valve 26 are closed, and the resin transformation and the cleaning are finished; after resin regeneration, transformation and cleaning is complete, column 3 waits for the next switch.

(14) Repeating the steps (2) to (13) to realize the continuous operation of the system;

(15) The method comprises the steps that after target substances are adsorbed from raw water through a series column, the water after crossing is detected through an online detector T3 (T3 for short) and then discharged into a crossing post-treatment system, wherein T3 is set for ensuring that the content of the target substances in the water after crossing does not exceed a set value, and generally, the water after crossing is detected through T1 and T2 in an online manner and is discharged into a crossing post-treatment system according to a set M₁The control of the value can ensure the normal and continuous operation of the system, but the abnormal state includes but is not limited to the water quality exceeding the normal range, M₁When the value setting is too high or too low, part of resin is invalid or regeneration is not good, or equipment is in failure and the like, the T3 detection value exceeds the set value, once the T3 value exceeds the standard, the resin column is automatically switched to continue to operate, and meanwhile, the system needs to be subjected to operations such as process parameter and operation program adjustment or failure removal;

a double-column series-connection circulation alternate continuous operation ion exchange system (see the attached figure 2) is mainly formed by connecting a raw water pool, a water inlet pump, a TI-T5 online detector, 1-28 valves and three ion exchange columns (filled with resin) through pipelines, and is characterized in that: the raw water pool is connected with the upper part of a column 1 through a water inlet pump, a T1, a pipeline, a valve 1 and an upper connecting pipe 1, the bottom of the column 1 is connected with the upper part of a column 2 through a lower connecting pipe 1, a valve 2, a T2, a pipeline, a valve 11 and an upper connecting pipe 2, and the bottom of the column 2 is connected with a post-treatment water treatment system through the lower connecting pipe 2, a valve 6, a T3 and a pipeline;

the raw water pool is connected with the upper part of the column 2 through a water inlet pump, a T1, a pipeline, a valve 4 and an upper connecting pipe 2; the bottom of the column 2 is connected with the upper part of a column 3 through a lower connecting pipe 2, a valve 5, a valve 2, a pipeline, a valve 12 and an upper connecting pipe 3, and the bottom of the column 3 is connected with a post-treatment water treatment system through the lower connecting pipe 3, the valve 9, the valve T3 and the pipeline;

the raw water pool is connected with the upper part of the column 3 through a water inlet pump, a T1, a pipeline, a valve 7 and an upper connecting pipe 3; the bottom of the column 3 is connected with the upper part of the column 1 through the lower connecting pipe 3, the valve 8, the valve 2, the pipeline, the valve 10 and the upper connecting pipe 1, and the bottom of the column 1 is connected with a post-treatment water treatment system through the lower connecting pipe 1, the valve 3, the valve T3 and the pipeline;

regenerant, transforming agent or countercurrent column washing water passes through a pipeline, a valve 27, a pipeline, a valve 14 and a lower connecting pipe 1 connecting column 1, downstream column washing water passes through a pipeline, a valve 28, a pipeline, a valve 13 and an upper connecting pipe 1 connecting column 1, resin regeneration liquid passes through an upper connecting pipe 1, a valve 15, a pipeline and a T5 column washing wastewater treatment system, resin transforming liquid and countercurrent column washing wastewater pass through the upper connecting pipe 1, the valve 13, the pipeline, a valve 25, the pipeline and a T4 column washing wastewater treatment system, and downstream column washing wastewater passes through the lower connecting pipe 1, the valve 14, the pipeline, a valve 26, the pipeline and the T4 column washing wastewater treatment system;

the regenerant, the transforming agent or the countercurrent column washing water passes through a pipeline, a valve 27, a pipeline, a valve 17 and a lower connecting pipe 2 connecting column 2, the forward flow column washing water passes through a pipeline, a valve 28, a pipeline, a valve 16 and an upper connecting pipe 2 connecting column 2, the resin regenerating liquid passes through the upper connecting pipe 2, a valve 18, a pipeline and a T5 column washing wastewater treatment system, the resin transforming liquid and the countercurrent column washing wastewater pass through the upper connecting pipe 2, the valve 16, the pipeline, a valve 25, the pipeline and the T4 column washing wastewater treatment system, and the forward flow column washing wastewater passes through the lower connecting pipe 1, the valve 17, the pipeline, the valve 26, the pipeline and the T4 column washing wastewater treatment system;

the regenerant, the transforming agent or the countercurrent column washing water passes through a pipeline, a valve 27, a pipeline, a valve 20 and a lower connecting pipe 3 connecting column 3, the forward flow column washing water passes through a pipeline, a valve 28, a pipeline, a valve 19 and an upper connecting pipe 3 connecting column 3, the resin regenerating liquid passes through the upper connecting pipe 3, a valve 21, a pipeline and a T5 column washing wastewater treatment system, the resin transforming liquid and the countercurrent column washing wastewater pass through the upper connecting pipe 3, the valve 19, the pipeline, a valve 25, the pipeline and the T4 column washing wastewater treatment system, and the forward flow column washing wastewater passes through the lower connecting pipe 1, the valve 20, the pipeline, the valve 26, the pipeline and the T4 column washing wastewater treatment system;

further optimally, the pipeline of the valve 1, the valve 10, the valve 13, the valve 15 and the valve 22, which is communicated with the upper part of the column 1, is an upper connecting pipe 1, and the pipeline of the valve 2, the valve 3 and the valve 14, which is communicated with the bottom of the column 1, is a lower connecting pipe 1;

the pipeline of the valve 4, the valve 11, the valve 16, the valve 18 and the valve 23 which is communicated with the upper part of the column 2 is an upper connecting pipe 2, and the pipeline of the valve 5, the valve 6 and the valve 17 which is communicated with the bottom of the column 2 is a lower connecting pipe 2;

the pipeline of the valve 7, the valve 12, the valve 19, the valve 21 and the valve 24 communicated with the upper part of the column 3 is an upper connecting pipe 3, and the pipeline of the valve 8, the valve 9 and the valve 20 communicated with the bottom of the column 3 is a lower connecting pipe 3.

Further optimally, raw water in the raw water pool enters the upper part of the column 1 through the water inlet pump, the pipeline, the TI, the valve 1 and the upper connecting pipe 1, passes through the resin layer in the column 1, enters the upper part of the column 2 through the lower connecting pipe 1, the valve 2, the T2, the pipeline, the valve 11 and the upper pipeline 2 at the bottom of the connecting column 1, passes through the resin layer in the column 2, and is discharged to the post-treatment water treatment system through the lower connecting pipe 2, the valve 6, the T3 and the pipeline at the bottom of the connecting column 2;

raw water in the raw water pool enters the upper part of the column 2 through a water inlet pump, a pipeline, a TI, a valve 4 and an upper connecting pipe 2, passes through a resin layer in the column 2, enters the upper part of the column 3 through a lower connecting pipe 2, a valve 5, a T2, a pipeline, a valve 12 and an upper connecting pipe 3 at the bottom of the connecting column 2, passes through the resin layer in the column 3, and is discharged to a post-treatment water treatment system through the lower connecting pipe 3, the valve 9, the T3 and the pipeline at the bottom of the connecting column 3;

raw water in the raw water pool enters the upper part of the column 3 through a water inlet pump, a pipeline, a TI (temporary organic chemical vapor deposition), a valve 7 and an upper connecting pipe 3, passes through a resin layer in the column 3, enters the upper part of the column 1 through a lower connecting pipe 3, a valve 8, a T2, a pipeline, a valve 10 and the upper connecting pipe 1 at the bottom of the connecting column 3, passes through the resin layer in the column 1, and is discharged to a post-treatment water treatment system through the lower connecting pipe 1, the valve 3, the T3 and the pipeline at the bottom of the connecting column 1;

the regenerant enters the column 1 through the pipeline, the valve 27, the pipeline, the valve 14 and the lower connecting pipe 1, and the resin regenerated liquid goes to a regenerated liquid treatment system through the valve 15, the pipeline and the T5; the transforming agent enters the column 1 through the pipeline, the valve 27, the pipeline, the valve 14 and the lower connecting pipe 1, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the pipeline, the valve 25, the pipeline and the T4; the countercurrent column washing water enters the column 1 through the pipeline, the valve 27, the pipeline, the valve 14 and the lower connecting pipe 1, and the countercurrent column washing wastewater passes through the upper connecting pipe 1, the valve 13, the pipeline, the valve 25, the pipeline and the T4 to a column washing wastewater treatment system; the downstream column washing water enters the column 1 through the pipeline, the valve 28, the pipeline, the valve 13 and the upper connecting pipe 1, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 1, the valve 14, the pipeline, the valve 26, the pipeline and the T4.

The regenerant enters the column 2 through the pipeline, the valve 27, the pipeline, the valve 17 and the lower connecting pipe 2, and the resin regenerated liquid passes through the valve 18, the pipeline and the T5 to a regenerated liquid treatment system; the transformation agent enters the column 2 through the pipeline, the valve 27, the pipeline, the valve 17 and the lower connecting pipe 2, and the resin transformation liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the pipeline, the valve 25, the pipeline and the T4; the countercurrent column washing water enters the column 2 through the pipeline, the valve 27, the pipeline, the valve 17 and the lower connecting pipe 2, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the pipeline, the valve 25, the pipeline and the T4; the downstream column washing water enters the column 2 through the pipeline, the valve 28, the pipeline, the valve 16 and the upper connecting pipe 2, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 2, the valve 17, the pipeline, the valve 26, the pipeline and the T4.

The regenerant enters the column 3 through a pipeline, a valve 27, a pipeline, a valve 20 and a lower connecting pipe 3, and the resin regeneration liquid goes to a regeneration liquid treatment system through a valve 21, a pipeline and T5; the transforming agent enters the column 3 through the pipeline, the valve 27, the pipeline, the valve 20 and the lower connecting pipe 3, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the pipeline, the valve 25, the pipeline and the T4; the countercurrent column washing water enters the column 3 through the pipeline, the valve 27, the pipeline, the valve 20 and the lower connecting pipe 3, and the countercurrent column washing wastewater passes through the upper connecting pipe 3, the valve 19, the pipeline, the valve 25, the pipeline and the T4 to a column washing wastewater treatment system; the downstream column washing water enters the column 3 through the pipeline, the valve 28, the pipeline, the valve 19 and the upper connecting pipe 3, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 3, the valve 20, the pipeline, the valve 26, the pipeline and the T4.

Further optimized, the system comprises 3 subsystems, namely (1) a double-column alternate series continuous operation system consisting of a water inlet pump, valves 1-9 and corresponding pipelines; (2) The online detection system consists of online detectors T1-T5, valves 10-12 and corresponding pipelines; (3) The resin regeneration cleaning system consists of valves 13-28 and corresponding pipelines.

A continuous series operation and cycle saturated ion exchange system characterized by: the column 1, the column 2 and the column 3 are filled with corresponding different resins according to different target objects contained in the recovered or removed raw water, and the operation principle and the steps are as follows:

(1) And (3) starting operation: the pump 1 is started, the valve 1, the valve 2, the valve 11 and the valve 6 are opened, raw water in a raw water pool enters the column 1 through the pump 1, the TI, the valve 1 and the upper connecting pipe 1 at a set flow rate, passes through a resin layer in the column 1, then enters the column 2 through the lower connecting pipe 1, the valve 2, the T2, the valve 11 and the upper connecting pipe 2; then after passing through the resin layer of the column 2, the wastewater is discharged through the lower connecting pipe 2, the valve 6 and the T4 to become water after the water is delivered to a water treatment system after the water is delivered, and the system runs by connecting the column 1 and the column 2 in series and downstream;

(2) Series column switching 1: when the column 1 and the column 2 in the step (1) are operated in series to M₁The value (see claim 5, the same below) reaches a set value, which indicates that the resin in the column 1 is nearly saturated with the target substance in the raw water, the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 4, the valve 5, the valve 12 and the valve 9 are opened, the raw water enters the column 2 through the pump 1, the TI, the valve 4 and the upper connecting pipe 2, passes through the resin layer in the column 2, enters the column 3 through the lower connecting pipe 2, the valve 5, the valve 12 and the upper connecting pipe 3, passes through the resin layer in the column 3, and is discharged to the post-cross water treatment system through the lower connecting pipe 3 and the valve 9; at this time, the system is switched to the operation of the column 2 and the column 3 in series and downstream;

(3) Recovery of raw water in column 1 and resin washing before regeneration: a) When the raw water in the column 1 is recovered, the content of components in the raw water needs to be controlled, when the valve 1, the valve 2, the valve 11 and the valve 6 are closed in the step (2), the valve 27, the valve 14 and the valve 22 are opened, the column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the raw water in the column 1 is ejected out by the column washing water and returns to a raw water pool for recovery through the upper connecting pipe 1 and the valve 22, when the column washing water reaches a set amount, the raw water in the column 1 is ejected out by all the column washing water, the valve 22 is closed, the valve 13 and the valve 25 are opened, the column washing water continues to carry out countercurrent cleaning on the resin, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, when the column washing water reaches the set amount, the column washing water stops entering, and the resin in the column 1 is thoroughly cleaned and then starts to be regenerated; b) If the raw water in the column 1 is recycled, the content of components in the raw water does not need to be controlled, when the valve 1, the valve 2, the valve 11 and the valve 6 are closed in the step (2), the valve 27, the valve 14 and the valve 22 are opened, the column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 1 and the valve 22, when the column washing water reaches the set amount, the column washing water is stopped to enter, the valve 22 is closed, and the next step of regeneration is started after the resin in the column 1 is thoroughly cleaned;

(4) Regeneration of resin in column 1: a) If the content of the target object in the regeneration liquid needs to be controlled, the valve 13 and the valve 25 are opened, a quantitative regenerant enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, column washing water in the column 1 is ejected by the regeneration liquid, passes through the upper connecting pipe 1, the valve 13, the valve 25 and the T4 and is detected by the T4 and then goes to a column washing water treatment system, when the detection value of the T4 reaches a set value, the column washing water in the column 1 is ejected by the regeneration liquid completely, the valve 13 is closed, the valve 15 is opened, and the regeneration liquid in the column 1 goes to the regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5; b) If the content of the target object in the regeneration liquid does not need to be controlled, the valve 15 is opened, a quantitative regenerant enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, and the regeneration liquid in the column 1 is sent to a regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5;

when the regenerant entering the column 1 reaches a set value, the regenerant is stopped to be fed, column washing water enters the column 1 again through the valve 27, the valve 14 and the lower connecting pipe 1, the regenerant in the column 1 is ejected out, the regenerant is discharged into the regenerant treatment system from the upper connecting pipe 1, the valve 15 and the T5, when a detection value of the T5 reaches the set value, the regenerant is ejected out completely by the column washing water, the valve 15 is closed, the valve 13 and the valve 25 are opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, the resin is continuously washed in a counter current manner, when the column washing water enters the set value, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 1 through the valve 28, the valve 13 and the upper connecting pipe, then the column washing water enters the column washing wastewater treatment system through the lower connecting pipe 1, the valve 14, the valve 26 and the T4, the resin washing wastewater treatment system is carried out to wash the resin, and the resin is washed, when the detection value of the T4 reaches the set value, the resin washing completion of the resin in the column 1, the column washing water is stopped, the column washing water is stopped to be fed, the regeneration valve 26 and the regeneration valve 28, and the downstream flow of the regeneration system is finished;

(5) Transformation of resin in column 1: when the valve 26 and the valve 28 are closed in the step (4), the valve 25 and the valve 27 are opened, the quantitative transforming agent enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 1 to reach a set amount, the column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1, then goes to the column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, when the column washing water enters to reach the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 1 through the valve 28, the valve 13 and the upper connecting pipe, then goes to the column washing wastewater treatment system after the lower connecting pipe 1, the valve 14, the valve 26 and the upper connecting pipe and the T4 and the column washing wastewater treatment system can finish the steps of the resin washing with the valve 26, the valve 14, the valve 28, the resin washing and the step without the step of closing. After the resin regeneration, transformation and cleaning are completed, the column 1 waits for the next switching;

(6) Series column switching 2: when the column 2 and the column 3 are operated in series to M in the step (2)₁When the value reaches a set value, indicating that the resin in the column 2 adsorbs a target object in raw water and is close to saturation, closing the valve 4, the valve 5, the valve 12 and the valve 9, opening the valve 7, the valve 8, the valve 10 and the valve 3, enabling the raw water to enter the column 3 through the pump 1, the TI, the valve 7 and the upper connecting pipe 3, enabling the raw water to enter the column 1 through the resin layer in the column 3, enabling the raw water to pass through the lower connecting pipe 3, the valve 8, the valve 2, the valve 10 and the upper connecting pipe 1, enabling the raw water to pass through the resin layer in the column 1, and enabling the raw water to be discharged out of the lower connecting pipe 1 and the valve 3 to a post-cross water treatment system; at this time, the system is switched to the operation of the column 3 and the column 1 in series and downstream;

(7) Recovery of raw water in column 2 and resin washing before regeneration: a) If the raw water in the column 2 needs to be controlled, in the step (6), the valve 4, the valve 5, the valve 12 and the valve 9 are closed, the valve 27, the valve 17 and the valve 23 are opened, the column washing water enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the raw water in the column 2 is ejected by the column washing water and returns to a raw water pool for recycling through the upper connecting pipe 2 and the valve 23, when the column washing water reaches a set amount, the raw water in the column 2 is ejected by the column washing water, the valve 23 is closed, the valve 16 and the valve 25 are opened, the column washing water continues to carry out countercurrent resin cleaning, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, when the column washing water reaches the set amount, the column washing water stops entering, and the resin in the column 2 is thoroughly cleaned and then starts to be regenerated in the next step; b) If the raw water in the column 1 is recycled, the content of components in the raw water does not need to be controlled, when the valve 4, the valve 5, the valve 12 and the valve 9 are closed in the step (6), the valve 27, the valve 17 and the valve 23 are opened, the column washing water enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 2 and the valve 23, when the column washing water enters to a set amount, the column washing water stops entering, the valve 23 is closed, and the next step of regeneration is started after the resin in the column 2 is thoroughly cleaned;

(8) Regeneration of resin in column 2: a) If the content of the target object in the regeneration liquid needs to be controlled, the valve 16 and the valve 25 are opened, a quantitative regenerant enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, column washing water in the column 2 is ejected out by the regeneration liquid and goes to a column washing water treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, when the detection value of the T4 reaches a set value, the column washing water in the column 2 is ejected out by the regeneration liquid, the valve 16 is closed, the valve 18 is opened, and the regeneration liquid in the column 2 goes to the regeneration liquid treatment system through the upper connecting pipe 2, the valve 18 and the T5; b) If the content of the target object in the regeneration liquid does not need to be controlled, the valve 18 is opened, a quantitative regenerant enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, and the regeneration liquid in the column 2 is sent to a regeneration liquid treatment system through the upper connecting pipe 2, the valve 18 and the T5;

when the regenerant entering the column 2 reaches a set amount, the regenerant is stopped to enter, column washing water enters the column 2 again through the valve 27, the valve 17 and the lower connecting pipe 2, the regenerant in the column 2 is ejected out, and is discharged into the regenerant treatment system from the upper connecting pipe 2, the valve 18 and the T5, when a T5 detection value reaches a set value, the regenerant is ejected out completely by the column washing water, the valve 18 is closed, the valve 16 and the valve 25 are opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, the resin is continuously washed in a counter-current manner, when the column washing water enters the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 2 through the valve 28, the valve 16 and the upper connecting pipe, then enters the column washing wastewater treatment system through the lower connecting pipe 2, the valve 17, the valve 26 and the T4, the resin is washed, and when the detection value of the T4 reaches the set value, the resin washing in the column 2 is finished, the washing of the column washing water stops the regeneration valve 26, the regeneration valve 28 and the resin is closed, and the resin washing is finished;

(9) Resin transformation in column 2: when the valve 26 and the valve 28 are closed in the step (8), the valve 25 and the valve 27 are opened, the quantitative transforming agent enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 2 to reach a set amount, the column washing water enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2, then goes to the column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, when the column washing water enters the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 2 through the valve 28, the valve 16 and the upper connecting pipe, then goes to the column washing wastewater treatment system after the lower connecting pipe 2, the valve 17, the valve 26 and the T4 detect value reaches a set value, the resin washing in the column washing water stops entering the valve 16, the valve 17, the valve 28 and the resin washing wastewater treatment system ends. After the regeneration, transformation and cleaning of the resin are completed, the column 2 waits for the next switching;

(10) Series column switching 3: when column 3 and column 1 are run in series to M in step (9)₁When the value reaches a set value, indicating that the resin in the column 3 adsorbs the target substances in the raw water and is close to saturation, closing the valve 7, the valve 8, the valve 10 and the valve 3, and switching to the series connection and downstream operation of the column 1 and the column 2 according to the step (1);

(11) Recovery of raw water in column 3 and resin washing before regeneration: a) If the raw water in the column 2 is recovered, the content of the components in the raw water needs to be controlled, when the valve 7, the valve 8, the valve 10 and the valve 3 are closed in the step (10), the valve 27, the valve 20 and the valve 24 are opened, the column washing water enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the raw water in the column 3 is ejected out by the column washing water and returns to a raw water pool for recovery through the upper connecting pipe 3 and the valve 24, when the column washing water reaches the set amount, the raw water in the column 3 is ejected out by the column washing water, the valve 24 is closed, the valve 19 and the valve 25 are opened, the column washing water continues to carry out countercurrent cleaning on the resin, the column washing wastewater is discharged into the column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, when the column washing water reaches the set amount, the column washing water stops entering, and the resin in the column 3 is thoroughly cleaned and then starts to be regenerated; b) If the raw water in the column 2 is recycled, the content of components in the raw water does not need to be controlled, when the valve 7, the valve 8, the valve 10 and the valve 3 are closed in the step (10), the valve 27, the valve 20 and the valve 24 are opened, the column washing water enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 3 and the valve 24, when the column washing water enters to a set amount, the column washing water stops entering, the valve 24 is closed, and the next step of regeneration is started after the resin in the column 3 is thoroughly cleaned;

(12) Regeneration of resin in column 3: a) If the content of the target object in the regeneration liquid needs to be controlled, the valve 19 and the valve 25 are opened, a quantitative regenerant enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is regenerated, column washing water in the column 3 is ejected by the regeneration liquid, passes through the upper connecting pipe 3, the valve 19, the valve 25 and the T4 and goes to a column washing water treatment system through the T4, when the detection value of the T4 reaches a set value, the column washing water in the column 3 is indicated to be ejected by the regeneration liquid completely, the valve 19 is closed, the valve 21 is opened, and the regeneration liquid in the column 3 goes to the regeneration liquid treatment system through the upper connecting pipe 3, the valve 21 and the T5; b) If the content of the target object in the regeneration liquid does not need to be controlled, the valve 21 is opened, a quantitative regenerant enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is regenerated, and the regeneration liquid in the column 3 is sent to a regeneration liquid treatment system through the upper connecting pipe 3, the valve 21 and the T5;

when the regenerant entering the column 3 reaches a set amount, the regenerant is stopped to enter, column washing water enters the column 3 again through the valve 20 and the lower connecting pipe 3, the regenerant in the column 3 is ejected out, and is discharged into the regenerant treatment system from the upper connecting pipe 3, the valve 21 and the lower connecting pipe 3, when a T5 detection value reaches a set value, the regenerant is ejected out completely by the column washing water, the valve 21 is closed, the valve 19 and the valve 25 are opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, the resin is continuously washed in a counter-current manner, when the column washing water reaches the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 3 through the valve 28, the valve 19 and the upper connecting pipe, then enters the column washing wastewater treatment system through the lower connecting pipe 3, the valve 20, the valve 26 and the T4, the resin is washed, and when the detection value of the T4 reaches the set value, the resin washing in the column 3 is finished, the column washing water stops entering, the column washing water, the valve 26 and the regeneration valve 28 and the resin is closed, and the resin is finished;

(13) Resin transformation in column 3: when the valve 26 and the valve 28 are closed in the step (12), the valve 25 and the valve 27 are opened, the quantitative transforming agent enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 3 to reach a set amount, the column washing water enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3, then goes to the column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, when the column washing water enters to reach the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 3 through the valve 28, the valve 19 and the upper connecting pipe, then goes to the column washing wastewater treatment system after the lower connecting pipe 3, the valve 20, the valve 26 and the T4 detect value of the T4, the resin washing water stops the valve 19, the valve 20 and the valve 28 and the resin washing wastewater treatment system ends. After the resin regeneration, transformation and cleaning are completed, the column 3 waits for the next switching;

(15) The method comprises the steps that after target substances are adsorbed from raw water through a series column, the water after the target substances are detected through an online detector T3 (T3 for short) and then discharged into an after-treatment system, the T3 is set for ensuring that the content of the target substances in the water after the water is mixed does not exceed a set value, generally, the water after the water is mixed is detected online through T1 and T2, and the water after the water is mixed is detected according to a set M₁The control of the value ensures normal continuous operation of the system, but in abnormal conditions, including but not limited to, for exampleWater quality out of normal range, M₁When the value is set to be too high or too low, part of resin is invalid or poor in regeneration, equipment is in fault and the like, the T3 detection value exceeds a set value, once the T3 value exceeds the standard, the resin column is automatically switched and continuously operates, and meanwhile, the system is required to be subjected to operations such as process parameter and operation program adjustment or fault removal;

further preferably, the T1, T2, T3, T4 and T5 online detectors are pH online detectors, electronic flow meters, color difference online detectors or sensors, chromaticity online detectors or sensors, color sensors, ORP (oxidation electrode potential) online detectors, conductivity online detectors, online colorimeters or sensors, metal ion online detectors, and the like, and 1 or a combination of more of them.

Preferably, the valve is one or a combination of several of a manual valve, an automatic valve, and an automatic valve (which can be switched manually or automatically) with a manual valve bypass.

Compared with the prior art, the invention has the following beneficial effects:

1. the double-column series connection and the alternate circulation continuous operation are realized through 3 exchange columns;

2. automatic operation is realized by setting on-line detection;

3. the design of a pipeline valve realizes that the water discharged from 3 exchange columns shares 1 online detector, so that the number of the detectors is reduced, and the probability of errors caused by using a plurality of detectors is also reduced;

4. through design, the number of valves required for realizing the alternating continuous operation of the double-column series connection is reduced to the minimum;

5. corresponding on-line detectors are adopted according to different characteristics of metal ions, and parameters are set according to the characteristics of the different on-line detectors, so that the application range of the automatic intelligent operation accurate control of the double-column series-connection circulating alternating continuous operation ion exchange system is expanded;

6. the operation efficiency of the ion exchange system and the utilization rate of the resin are improved, the consumption of the regenerated medicament and cleaning water of the resin is reduced, and the investment cost and the operation cost of the equipment system are reduced.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the invention and a schematic structural diagram of example 1;

FIG. 2 is a schematic structural diagram of the invention and a schematic structural diagram of embodiment 2;

FIG. 3 is a schematic structural diagram of embodiment 3.

The specific implementation mode is as follows:

the following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Example 1

System composition and working principle (see figure 1):

the device comprises a raw water pool, a water inlet pump, a column 1, a column 2 and a column 3, an ion exchange column 1-30 valves, an upper connecting pipe 1-3, a lower connecting pipe 1-3, an on-line detection system and a pipeline, 3 subsystems are included: (1) The double-column alternate series continuous operation system consists of a pump 1, valves 1-9 and corresponding pipelines; (2) The online detection system consists of online detectors T1-T5, valves 10-12 and corresponding pipelines, wherein T1-T3 and T5 are online colorimeters, and T4 is an online pH meter; (3) The resin regeneration cleaning system is composed of valves 13-30 and corresponding pipelines. The columns 1-3 are filled with sodium type ion exchange resin (resin for short, the same below) for recovering nickel in the nickel-containing wastewater, and the working principle is as follows:

1. and (3) starting operation: starting a water inlet pump, opening a valve 1, a valve 2, a valve 11 and a valve 6, enabling raw water (nickel-containing wastewater) in a raw water pool to enter a column 1 through the water inlet pump, a valve 1, the valve 1 and an upper connecting pipe 1, and enabling the raw water to enter the column 2 through a lower connecting pipe 1, the valve 2, the valve 11 and the upper connecting pipe 2 after passing through a resin layer in the column 1; and then passes through the resin layer of the column 2, and is discharged to a post-cross water treatment system through a lower connecting pipe 2, a valve 6 and a T3, and the system runs in a way that the column 1 and the column 2 are connected in series and flow in parallel. After the resin in the column 1 adsorbs the nickel ions to a certain degree, the penetration and leakage begin to occur, along with the saturation of the resin in the column 1The degree gradually increases, the penetration and leakage of nickel ions are also gradually increased, and the chromaticity detection value C of T2₂Also gradually increases and gradually approaches the chromaticity detection value C of T1₁，M₁＝C₂/C₁The value is gradually increased, the nickel ions leaked from the column 1 are continuously adsorbed by the resin in the column 2, and the nickel ions in the raw water are discharged after being completely adsorbed;

2. series column switching 1: when column 1 and column 2 are run in series to M₁A is larger than or equal to A, which indicates that resin adsorption nickel in the column 1 is nearly saturated (the saturation is larger than or equal to 70%), the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 4, the valve 5, the valve 12 and the valve 9 are opened, raw water enters the column 2 through the water inlet pump, the T1, the valve 4 and the upper connecting pipe 2, enters the column 3 through the resin layer in the column 2, passes through the lower connecting pipe 2, the valve 5, the T2, the valve 12 and the upper connecting pipe 3, then passes through the resin layer in the column 3, and is discharged to a post-cross water treatment system through the lower connecting pipe 3, the valve 9 and the T3, and at the moment, the system is switched to the series-connection concurrent operation of the column 2 and the column 3;

3. recovery of raw water in column 1 and resin washing before regeneration: in step 2, while the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 14 and the valve 28 are opened, column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, resin in the column 1 is washed, column washing wastewater returns to a raw water tank through the upper connecting pipe 1 and the valve 28, when the column washing water reaches the set flow rate, the column washing water stops entering, the valve 28 is closed, and the resin in the column 1 is thoroughly washed clean, and then the next step of regeneration is started.

4. Regeneration of resin in column 1: when the valve 28 is closed and the valve 17 is opened in the step 3, the regenerant (sulfuric acid, the same applies below) enters the column 1 through the valve 14 and the lower connecting pipe 1, the nickel adsorbed by the resin is continuously desorbed by the regenerant to become a regenerated liquid containing nickel sulfate, meanwhile, the column washing water in the column 1 is continuously ejected by the regenerated liquid, is discharged through the upper connecting pipe 1 and the valve 17, and then passes through the T4 column washing water treatment system, when the detected pH value of T4 is less than or equal to B, the regenerated liquid is indicated to eject all the residual column washing water in the column 1, the valve 17 is closed, the valve 15 is opened, the regenerated liquid in the column 1 passes through the upper connecting pipe 1, the valve 15 and the T5 column washing water treatment system, when the regenerant entering the column 1 reaches the set amount, the regenerated liquid stops entering, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1 again, jacking the regenerated liquid in the column 1 into a regenerated liquid treatment system through an upper connecting pipe 1, a valve 15 and a valve T5, when a T5 chroma value is less than C, indicating that most of the regenerated liquid in the column 1 is ejected by column washing water, closing the valve 15, opening a valve 17, washing the column waste water treatment system through the upper connecting pipe 1, the valve 17 and the T4, and cleaning resin in a countercurrent mode, when the column washing water reaches a set amount, closing the valve 14 and the valve 17, opening the valve 13 and the valve 16, enabling the column washing water to enter the column 1 through the valve 13 and the upper connecting pipe 1, and then washing the column waste water treatment system through a lower connecting pipe 1, a valve 16 and the T4, and cleaning the resin in a downstream mode, when the pH value detected by the T4 is not less than or equal to D, stopping the water inflow of the column washing water, closing the valve 13 and the valve 16, and finishing the regeneration and the cleaning of the resin;

5. resin transformation in column 1: when the valve 13 and the valve 16 are closed in the step 4, the valve 14 and the valve 17 are opened, a transformation agent (sodium hydroxide solution, the same below) enters the column 1 through the valve 14 and the lower connecting pipe 1, and then enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, after the transformation agent entering the column 1 reaches a set amount, the transformation agent is stopped entering, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1, and then enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, the resin is washed in a countercurrent manner, when the column washing water reaches the set amount, the valve 14 and the valve 17 are closed, the valve 13 and the valve 16 are opened, the column washing water enters the column 1 through the valve 13 and the upper connecting pipe 1, and then enters the column washing wastewater treatment system through the lower connecting pipe 1, the valve 16 and the T4, the resin is washed in a concurrent manner, when the detected pH value of T4 is less than or equal to E, the column washing water is stopped entering, the valve 13 and the valve 16 is closed, the resin transformation and the resin is washed, and the column 1 waits for next switching;

6. series column switching 2: when column 2 and column 3 are run in series to M in step 2₁A is larger than or equal to A, which indicates that the nickel ions in the resin adsorption raw water in the column 2 are nearly saturated, the valves 4, 5, 12 and 9 are closed, the valves 7, 8, 10 and 3 are opened, the raw water enters the column 3 through the water inlet pump, the T1, the valve 7 and the upper connecting pipe 3, passes through the resin layer in the column 3, enters the column 1 through the lower connecting pipe 3, the valve 8, the T2, the valve 10 and the upper connecting pipe 1, passes through the resin layer in the column 1, and is discharged to a post-cross water treatment system through the lower connecting pipe 1, the valve 3 and the T3, and at the moment, the system is switched to the series-connection forward-flow operation of the column 3 and the column 1;

7. recovery of raw water in column 2 and resin washing before regeneration: in step 6, while closing the valve 4, the valve 5, the valve 12 and the valve 9, the valve 19 and the valve 29 are opened, column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, resin in the column 2 is washed, column washing wastewater returns to a raw water tank through the upper connecting pipe 2 and the valve 29, when the column washing water inlet reaches a set amount, the column washing water is stopped to enter, the valve 29 is closed, and the resin in the column 2 is thoroughly washed and cleaned, and then the next step of regeneration is started.

8. Regeneration of resin in column 2: when the valve 29 is closed and the valve 22 is opened in the step 7, the regenerant enters the column 2 through the valve 19 and the lower connecting pipe 2, meanwhile, the column washing water in the column 2 is continuously ejected by the regenerant and is discharged through the upper connecting pipe 2 and the valve 22, then the column washing water enters the column washing water treatment system through T4, when the detected pH value of T4 is less than or equal to B, the valve 22 is closed, the valve 20 is opened, the regenerant in the column 2 enters the regenerant treatment system through the upper connecting pipe 2, the valve 20 and the T5, when the regenerant entering the column 2 reaches a set amount, the feeding of the regenerant is stopped, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2 again, and the regenerant in the column 2 is ejected into the regenerant treatment system through the upper connecting pipe 2, the valve 20 and the T5, when the T5 chroma value is less than or equal to C, closing the valve 20, opening the valve 22, enabling the column washing water to go to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, washing resin in a countercurrent mode, when the column washing water enters a set amount, closing the valve 19 and the valve 22, opening the valve 18 and the valve 21, enabling the column washing water to enter the column 2 through the valve 18 and the upper connecting pipe 2, then going to the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21 and the T4, washing the resin in a forward flow mode, when the detected pH value of the T4 is less than or equal to D, stopping the column washing water entering, closing the valve 18 and the valve 21, and finishing resin regeneration and washing;

9. transformation of resin in column 2: when the valve 18 and the valve 21 are closed in the step 8, the valve 19 and the valve 22 are opened, the transformation agent enters the column 2 through the valve 19 and the lower connecting pipe 2, and then enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, after the transformation agent entering the column 2 reaches a set amount, the transformation agent stops entering, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, then enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, and the resin is washed in a countercurrent manner, when the column washing water reaches the set amount, the valve 19 and the valve 22 are closed, the valve 18 and the valve 21 are opened, the column washing water enters the column 2 through the valve 18 and the upper connecting pipe 2, then enters the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21 and the T4, the resin is washed in a concurrent manner, when the detected pH value of the T4 is less than or equal to E, the column washing water stops entering, the valve 18 and the valve 21 are closed, the resin transformation and the washing are finished, and the column 2 waits for next switching;

10. series column switching 3: when the column 3 is in step 6Run in series with column 1 to M₁A is not less than A, which indicates that the resin in the column 3 adsorbs nickel ions in raw water to be close to saturation, the valve 7, the valve 8, the valve 10 and the valve 3 are closed, and the operation is switched to the series connection and concurrent flow operation of the column 1 and the column 2 according to the step 1;

11. recovery of raw water in column 3 and resin washing before regeneration: in step 10, while closing the valve 7, the valve 8, the valve 10 and the valve 3, the valve 24 and the valve 30 are opened, column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, resin in the column 3 is washed, column washing wastewater returns to a raw water tank through the upper connecting pipe 3 and the valve 30, when the column washing water inlet reaches a set amount, the column washing water is stopped to enter, the valve 30 is closed, and the resin in the column 3 is thoroughly washed and cleaned, and then the next step of regeneration is started.

12. Regeneration of resin in column 3: when the valve 30 is closed and the valve 27 is opened in step 11, the regenerant enters the column 3 through the valve 24 and the lower connecting pipe 3, meanwhile, the column washing water in the column 3 is continuously ejected by the regenerant and is discharged through the upper connecting pipe 3 and the valve 27, and then enters the column washing water treatment system through T4, when the detected pH value of T4 is less than or equal to B, the valve 27 is closed, the valve 25 is opened, the regenerant in the column 3 enters the regenerant treatment system through the upper connecting pipe 3, the valve 25 and the T5, when the regenerant entering the column 3 reaches a set value, the feeding of the regenerant is stopped, the column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3 again, the regenerant in the column 3 is pushed into the regenerant treatment system through the upper connecting pipe 3, the valve 25 and the T5, when the chroma value of T5 is less than or equal to C, the valve 25 is closed, the valve 27 is opened, the column washing water enters the column washing water treatment system through the upper connecting pipe 3, the valve 27 and the T4, the column washing water treatment system through the valve 24, the valve 27 and the column washing water inlet pipe 26, the column washing water treatment system is stopped, and the column washing water inlet pipe 23, and the column washing resin is stopped, and the column washing water treatment system, and the column washing water inlet pipe 26, and the column washing water detection is finished by the column washing resin, when the column washing water inlet pipe 23, the column washing system, the column washing water inlet pipe 23, the column washing resin is detected wastewater is detected by the valve 23, the column washing system, and the column washing system, the column washing resin, the column washing system is detected wastewater is detected by the valve 26, the valve 23, the column washing system, and the column washing system, the column washing system after the column washing system;

13. resin transformation in column 3: when the valve 23 and the valve 26 are closed in the step 12, the valve 24 and the valve 27 are opened, the transformation agent enters the column 3 through the valve 24 and the lower connecting pipe 3, and then enters the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, after the transformation agent entering the column 3 reaches a set amount, the transformation agent stops entering, the column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, then enters the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, the resin is washed in a countercurrent manner, when the column washing water enters the set amount, the valve 24 and the valve 27 are closed, the valve 23 and the valve 26 are opened, the column washing water enters the column 3 through the valve 23 and the upper connecting pipe 3, then enters the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26 and the T4, the resin is washed in a concurrent manner, when the detected pH value of the T4 is less than or equal to E, the column washing water stops entering, the valve 23 and the valve 26 are closed, the resin transformation and the washing are finished, and the column 3 waits for next switching;

14. repeating the steps 2-13.

15. And T3 is to ensure that the content of nickel ions in the water after the water is delivered does not exceed the standard, and once the chromaticity detection value of T3 exceeds a set value, the series connection columns are switched according to the steps 2, 6 and 10 and continue to operate according to the subsequent steps.

Example 2

System composition and operating principle (see figure 2):

the device consists of a raw water pool, a water inlet pump, a column 1, a column 2, a column 3 ion exchange column, a valve 1-28, an upper connecting pipe 1-3, a lower connecting pipe 1-3, an online detection system and a pipeline, and comprises 3 subsystems: (1) The double-column alternate series continuous operation system consists of a pump 1, valves 1 to 9 and corresponding pipelines; (2) The online detection system consists of online detectors T1-T6, valves 10-12 and corresponding pipelines, wherein T1-T4 is an online ORP (oxidation electrode potential) meter, and T5 and T6 are online pH meters; (3) The resin regeneration cleaning system is composed of valves 13-28 and corresponding pipelines. The column 1-3 is filled with sulfuric acid type anion exchange resin (resin for short, the same applies below) for recovering Cr in chromium-containing wastewater⁶⁺The working principle is as follows:

1. and (3) starting operation: starting the water inlet pump, opening the valves 1, 2, 11 and 6, and collecting the raw water (containing Cr) in the raw water pool⁶⁺Waste water) enters the column 1 through the water inlet pump, the T1, the valve 1 and the upper connecting pipe 1, passes through the resin layer in the column 1, enters the column 2 through the lower connecting pipe 1, the valve 2, the T2, the valve 11 and the upper connecting pipe 2, passes through the resin layer of the column 2, and is discharged to the post-treatment water treatment system through the lower connecting pipe 2, the valve 6 and the T3, and at the moment, the system runs in a way that the column 1 and the column 2 are connected in series and flow;

2. series column switching 1: ORP detection value C when column 1 and column 2 are operated in series to T2₁ORP detection value C near T1₂When M is₁＝(C₂-C₁)/C₁≦ A, indicating adsorption of Cr by the resin in column 1⁶⁺The ions are close to saturation, the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 4, the valve 5, the valve 12 and the valve 9 are opened, raw water enters the column 2 through the water inlet pump, the valve 4, the upper connecting pipe 2, the lower connecting pipe 2, the valve 5, the T2, the valve 12 and the upper connecting pipe 3 after passing through a resin layer in the column 2, and then enters the column 3 through the resin layer in the column 3, and is discharged to a post-exchange water treatment system through the lower connecting pipe 3, the valve 9 and the T3, and at the moment, the system is switched to be in series connection with the column 2 and the column 3 for downstream operation;

3. recovery of raw water in column 1 and resin washing before regeneration: in the step 2, when the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 14, the valve 22 and the valve 27 are opened, column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1, resin in the column 1 is washed, column washing wastewater returns to a raw water tank through the upper connecting pipe 1 and the valve 22, when column washing water inlet reaches a set amount, the column washing water stops entering, the valve 22 is closed, and the resin in the column 1 is thoroughly washed clean, and then the next step of regeneration is started;

4. regeneration of resin in column 1: when the valve 22 is closed and the valves 13 and 25 are opened in step 3, the regenerant (sodium hydroxide solution) is introduced into the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1, and the resin-adsorbed Cr in the column 1⁶⁺Desorbed by the regenerant to become a regenerant containing sodium chromate, simultaneously the column washing water in the column 1 is ejected by the regenerant and discharged through the upper connecting pipe 1 and the valve 13, and then goes to a column washing water treatment system through the valve 25 and the T4, when the pH value detected by the T4 is larger than or equal to B, the regenerant is shown to eject all the residual column washing water in the column 1, the valve 13 is closed, the valve 15 is opened, the regenerant in the column 1 goes to the regenerant treatment system through the upper connecting pipe 1, the valve 15 and the T5, when the regenerant entering the column 1 reaches a set amount, the feeding of the regenerant is stopped, the column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 again, jacking the regenerated liquid in the column 1 into a regenerated liquid treatment system through an upper connecting pipe 1, a valve 15 and a T5, when the detected pH value of the T5 is less than or equal to C, indicating that most of the regenerated liquid in the column 1 is ejected by column washing water, closing the valve 15, opening the valve 13, removing the column washing water to the column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, washing resin in a countercurrent manner, closing the valve 25 and the valve 27 when the column washing water reaches a set amount, opening the valve 26 and the valve 28, allowing the column washing water to enter the column 1 through the valve 28, the valve 13 and the upper connecting pipe 1, and then allowing the column washing water to enter the column 1 through the lower connecting pipe 1, the valve 14 and the valve 1426 and T4 go to a column washing wastewater treatment system, washing the resin downstream, stopping water inlet of the column washing water when the pH value detected by the T4 is less than or equal to D, closing the valve 26 and the valve 28, and finishing resin regeneration and washing;

5. resin transformation in column 1: when the valve 26 and the valve 28 are closed in the step 4, the valve 25 and the valve 27 are opened, a transforming agent (sulfuric acid, the same applies below) enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1, and then goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, after the transforming agent entering the column 1 reaches a set amount, the transforming agent stops entering, column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1, then goes to the column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, and the resin is washed in a countercurrent manner, when column washing water enters the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, column washing water enters the column 1 through the valve 28, the valve 13 and the upper connecting pipe 1, then goes to the column washing wastewater treatment system through the lower connecting pipe 1, the valve 14, the valve 26 and the T4, and the resin is washed in a concurrent manner, and when the detection pH value of the T4 is not less than E, the column washing water stop water entering, the valve 13, the valve 14, the valve 26, the valve 14, the column washing wastewater treatment system is switched and the column washing wastewater treatment system and the lower connecting pipe 1 and the column washing wastewater treatment system is finished waiting for one time;

6. series column switching 2: when column 2 and column 3 are run in series to M in step 2₁< A > adsorption of Cr in raw water by a resin in column 2⁶⁺Closing a valve 4, a valve 5, a valve 12 and a valve 9, opening a valve 7, a valve 8, a valve 10 and a valve 3, enabling raw water to enter a column 3 through a water inlet pump, a valve 7, an upper connecting pipe 3, passing through a resin layer in the column 3, entering the column 1 through a lower connecting pipe 3, the valve 8, a valve 2, the valve 10 and the upper connecting pipe 1, passing through the resin layer in the column 1, and discharging the raw water to a post-transaction water treatment system through the lower connecting pipe 1, the valve 3 and the T3; at this time, the system is switched to the operation of the column 3 and the column 1 in series and downstream;

7. recovery of raw water in column 2 and resin washing before regeneration: in step 6, while closing the valves 4, 5, 12 and 9, the valves 17, 23 and 27 are opened, column washing water enters the column 2 through the valves 27, 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is washed, column washing wastewater returns to a raw water tank through the upper connecting pipe 2 and the valve 23, when the column washing water reaches a set amount, the column washing water stops entering, the valves 23 are closed, and the resin in the column 2 is thoroughly washed and cleaned, and then the next step of regeneration is started.

8. Regeneration of resin in column 2: when the valve 23 is closed, the valve 16 and the valve 25 are opened, the regenerant enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2, the column washing water in the column 2 is ejected by the regenerant and is discharged through the upper connecting pipe 2 and the valve 16, then the regenerant goes to the column washing water treatment system through the valve 25 and the valve T4, when the detected pH value of T4 is ≧ B, the valve 16 is closed, the valve 18 is opened, the regenerant in the column 2 goes to the regenerant treatment system through the upper connecting pipe 2, the valve 18 and the valve T5, when the regenerant entering the column 2 reaches a set amount, the feeding of the regenerant is stopped, the column washing water again goes to the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2, the regenerant in the column 2 is ejected into the regenerant treatment system through the upper connecting pipe 2, the valve 18 and the valve T5, when the detected pH value of T5 is ≦ C, the valve 18 is closed, the valve 16 is opened, the column washing water goes to the column washing water treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the valve 26, when the detected pH value of the column washing water reaches the valve 26, the column washing water inlet treatment system is stopped, and the valve 26, and the column washing water inlet of the column washing water is stopped, and the valve 26, and the column washing water inlet of the column washing system is stopped, and the valve 26, and the column washing water inlet of the column washing water treatment system after the set value of the valve 2 is stopped.

9. Resin transformation in column 2: when the valves 26 and 28 are closed in the step 8, the valves 25 and 27 are opened, the transforming agent enters the column 2 through the valves 27, 17 and the lower connecting pipe 2, and then enters the column wastewater treatment system through the upper connecting pipe 2, the valves 16, the valves 25 and the T4, after the transforming agent entering the column 2 reaches a set amount, the transforming agent stops entering, the column washing water enters the column 2 through the valves 27, 17 and the lower connecting pipe 2, and then enters the column wastewater treatment system through the upper connecting pipe 2, the valves 16, the valves 25 and the T4, the resin is washed in a countercurrent manner, when the column washing water reaches the set amount, the valves 25 and 27 are closed, the valves 26 and 28 are opened, the column washing water enters the column 2 through the valves 28, 16 and the upper connecting pipe 2, and then enters the column wastewater treatment system through the lower connecting pipe 2, the valves 17, the valves 26 and the T4, the resin is washed in a concurrent manner, and when the detected pH value of the T4 is not less than E, the column washing water stops entering, the valve 16, the valve 17, the valves 26 and the valve 28 and the column wastewater treatment system is switched, and the column wastewater treatment system waits for one time.

10. Series column switching 3: when column 3 and column 1 are run in series to M in step 9₁< A > adsorption of Cr in raw water by the resin in column 3⁶ ⁺Closing the valves 7, 7 when the ions are nearly saturated8. Valve 10 and valve 3, according to step 1 switching to column 1 and column 2 series flow operation;

11. recovery of raw water in column 3 and resin washing before regeneration: in step 10, while closing the valves 7, 8, 10 and 3, the valves 20, 24 and 27 are opened, column washing water enters the column 3 through the valves 27, 20 and the lower connecting pipe 3 at a set flow rate, resin in the column 3 is washed, column washing wastewater returns to a raw water tank through the upper connecting pipe 3 and the valve 24, when the column washing water reaches a set amount, the column washing water stops entering, the valves 24 are closed, and the resin in the column 3 is thoroughly washed and then is regenerated in the next step.

12. Regeneration of resin in column 3: when the valve 24 is closed, the valve 19 and the valve 25 are opened in the step 11, the regenerant enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3, the column washing water in the column 3 is pushed out by the regenerant and is discharged through the upper connecting pipe 3 and the valve 19, then the regenerant goes to a column washing water treatment system through the valve 25 and the valve T4, when the pH value detected by the T4 is not less than B, the valve 19 is closed, the valve 21 is opened, the regenerant in the column 3 goes to the regenerant treatment system through the upper connecting pipe 3, the valve 21 and the T5, when the regenerant entering the column 3 reaches a set amount, the regenerant stops entering, the column washing water enters the column 3 again through the valve 27, the valve 20 and the lower connecting pipe 3, the regenerant in the column 3 is pushed into the regenerant treatment system through the upper connecting pipe 3, the valve 21 and the T5, when the detected pH value of T5 is less than or equal to C, closing the valve 21, opening the valve 19, removing column washing water from a column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, washing resin in a countercurrent manner, when the water inflow of the column washing water reaches a set amount, closing the valve 25 and the valve 27, opening the valve 26 and the valve 28, allowing the column washing water to enter the column 3 through the valve 28, the valve 19 and the upper connecting pipe 3, removing the column washing wastewater treatment system through the lower connecting pipe 3, the valve 20, the valve 26 and the T4, washing the resin in a forward flow manner, when the detected pH value of T4 is less than or equal to E, stopping water inflow of the column washing water, closing the valve 26 and the valve 28, and finishing resin regeneration and washing;

13. resin transformation in column 3: when the valves 26 and 28 are closed in the step 12, the valves 25 and 27 are opened, the transforming agent enters the column 3 through the valves 27, 20 and the lower connecting pipe 3, and then enters the column washing wastewater treatment system through the upper connecting pipe 3, the valves 19, 25 and T4, after the transforming agent entering the column 3 reaches a set amount, the transforming agent stops entering, the column washing water enters the column 3 through the valves 27, 20 and the lower connecting pipe 3, and then enters the column washing wastewater treatment system through the upper connecting pipe 3, the valves 19, 25 and T4, the resin is washed in a counter-current manner, when the column washing water reaches the set amount, the valves 25 and 27 are closed, the valves 26 and 28 are opened, the column washing water enters the column 3 through the valves 28, 19 and the upper connecting pipe 3, and then enters the column washing wastewater treatment system through the lower connecting pipe 3, the valves 20, 26 and T4, the resin is washed, and when the pH value detected by T4 is not less than E, the column washing water stops entering, the valves 19, 20, 26 and 28, the valves 26 and T4 are switched, and the column washing wastewater treatment system is finished;

14. repeating the steps 2-13.

15. T3 is to ensure Cr in the post-hybridization water⁶⁺And (3) the content does not exceed the standard, once the ORP detection value of T3 exceeds a set value, the series columns are switched according to steps 2, 6 and 10, and the operation is continued according to the subsequent steps.

Example 3

System composition and working principle (see figure 3):

the device consists of a raw water pool, a water inlet pump, a column 1, a column 2, a column 3 ion exchange column, valves 1-30, an upper connecting pipe 1-3, a lower connecting pipe 1-3, an online detection system and a pipeline, and comprises 4 subsystems: (1) The double-column alternate series continuous operation system consists of a pump 1, valves 1-9 and corresponding pipelines; (2) The online detection system consists of online detectors T1-T5, valves 10-12 and corresponding pipelines, wherein T1-T4 and T6 are online optical fiber color sensors, and T5 is an online pH meter; (3) The resin regeneration cleaning system is composed of valves 13-30 and corresponding pipelines. The column 1-3 is filled with hydrogen type chelating ion exchange resin (resin for short, the same below) for separating and recovering copper in copper-containing nickel sulfate solution, and the working principle is as follows:

1. and (3) starting operation: the intake pump starts, opens valve 1, valve 2, valve 11, valve 6, and copper-containing nickel sulfate solution (for short, raw water, the same below) in the raw water pond enters post 1 through intake pump, T1, valve 1 and upper connecting pipe 1, after passing through the resin layer in post 1, through lower connecting pipe 1, valve 2, T2, valve 11 and upper connecting pipe 2, enters post 2, and after passing through the resin layer of post 2, through lower connecting pipe 2, valve 6 and T3 external row to hand over the post water treatment system, the system is that post 1 and post 2 are established ties the following current and are operated this moment. After the resin in the column 1 adsorbs the copper ions in the raw water to a certain degree, the copper ions which leak through the column 1 are continuously adsorbed by the resin in the column 2, so that the copper ions in the raw water are ensuredThe seed is discharged after being adsorbed completely, along with the gradual increase of the saturation of the resin in the column 1, the penetration and leakage of copper ions are gradually increased, and the color degree detection value C of T2₂Also gradually increases and gradually approaches the color degree detection value C of T1₁；

2. Series column switching 1: when column 1 and column 2 are run in series to M₁＝(C₂-C₁)/C₁B,. Ltoreq.A, which indicates that the resin in the column 1 is nearly saturated with adsorbed copper ions, the valves 1, 2, 11 and 6 are closed, the valves 4, 5, 12 and 9 are opened, raw water enters the column 2 through the water inlet pump, the valve 4, the upper connecting pipe 2, passes through the resin layer in the column 2, enters the column 3 through the lower connecting pipe 2, the valve 5, T2, the valve 12 and the upper connecting pipe 3, passes through the resin layer in the column 3, and is discharged to the post-cross water treatment system through the lower connecting pipe 3, the valve 9 and the T3; at this time, the system is switched to the operation of the column 2 and the column 3 in series and downstream;

3. recovery of raw water in column 1 and resin washing before regeneration: in the step 2, the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 14 and the valve 28 are opened, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the raw water in the column 1 is ejected out by the column washing water and returns to a raw water pool through the upper connecting pipe 1 and the valve 28 for recycling, when the column washing water reaches a set amount, the raw water in the column 1 is ejected out by the column washing water, the valve 28 is closed, the valve 17 is opened, the column washing water continues to carry out countercurrent washing on the resin, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, when the column washing water reaches the set amount, the column washing water is stopped to enter, the valve 17 is closed, and the resin in the column 1 is thoroughly washed and then starts to be regenerated in the next step;

4. regeneration of resin in column 1: when the valve 17 is closed and the valve 15 is opened in the step 3, the regenerant (sulfuric acid, the same applies below) enters the column 1 through the valve 14 and the lower connecting pipe 1, copper ions adsorbed by the resin are continuously desorbed by the regenerant to become a regenerated liquid containing copper sulfate, the regenerated liquid in the column 1 enters the regenerated liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5, when the regenerant entering the column 1 reaches a set amount, the regenerated liquid is stopped to enter, column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1, the regenerated liquid in the column 1 is jacked into the regenerated liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5, and when the color value of the T5 is less than B, indicating that most of the regenerated liquid in the column 1 is ejected by the column washing water, at this time, the valve 15 is closed, the valve 17 is opened, the column washing water enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, the resin is washed in a countercurrent manner, when the column washing water reaches a set amount, the valve 14 and the valve 17 are closed, the valve 13 and the valve 16 are opened, the column washing water enters the column 1 through the valve 13 and the upper connecting pipe 1, and then the column washing wastewater treatment system is washed through the lower connecting pipe 1, the valve 16 and the T4, the resin is washed in a concurrent manner, when the detected pH value of the T4 is not less than C, the column washing water stops entering, the valve 13 and the valve 16 are closed, the resin regeneration and washing are finished, and the column 1 waits for next switching;

5. series column switching 2: when column 2 and column 3 are run in series to M in step 2₁(iii) a ≦ a, which indicates that the resin in column 2 is nearly saturated with copper ions in the raw water, closing valves 4, 5, 12 and 9, opening valves 7, 8, 10 and 3, allowing the raw water to enter column 3 through feed pump, T1, 7 and upper adapter 3, to pass through the resin bed in column 3, to enter column 1 through lower adapter 3, 8, T2, 10 and upper adapter 1, and to pass through the resin bed in column 1, and to be discharged to the post-treatment water treatment system through lower adapter 1, valve 3 and T3; at this time, the system is switched to the operation of the column 3 and the column 1 in series and downstream;

6. recovery of raw water in column 2 and resin washing before regeneration: in the step 5, closing the valve 4, the valve 5, the valve 12 and the valve 9, opening the valve 19 and the valve 29, allowing column washing water to enter the column 2 through the valve 19 and the lower connecting pipe 2, ejecting raw water in the column 2 out of the column washing water, returning the raw water to a raw water pool through the upper connecting pipe 2 and the valve 29 for recycling, when the column washing water reaches a set amount, the raw water in the column 2 is ejected out by the column washing water, closing the valve 29, opening the valve 22, continuously washing resin by countercurrent flow by the column washing water, discharging the column washing wastewater into a column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, and when the column washing water reaches the set amount, stopping column washing water, closing the valve 22, and completely washing the resin in the column 2 to start the next step of regeneration;

7. regeneration of resin in column 2: when the valve 22 is closed and the valve 20 is opened in the step 6, a quantitative regenerant enters the column 2 through the valve 19 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, the regenerant in the column 2 enters the regenerant treatment system through the upper connecting pipe 2, the valve 20 and the T5, when the regenerant entering the column 2 reaches a set amount, the regenerant is stopped entering, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, the regenerant in the column 2 is pushed into the regenerant treatment system through the upper connecting pipe 2, the valve 20 and the T5, when the color value of T5 is less than or equal to B, the valve 20 is closed, the valve 22 is opened, the column washing wastewater enters the column 2 through the upper connecting pipe 2, the valve 22 and the T5, the column washing wastewater treatment system is washed with the resin in a countercurrent, when the column washing water enters the set amount, the valve 19 and the valve 22 are closed, the valve 18 and the valve 21 are opened, the column washing water enters the column 2 through the valve 18 and the upper connecting pipe 2, then enters the column washing wastewater treatment system through the lower connecting pipe 2, when the column washing water enters the regeneration system through the lower connecting pipe 2, the valve 21 and the regeneration system, the pH value of the valve 4, the downstream valve 18 is detected, and the column washing valve 21, the column washing water is detected, and the column washing valve 18 is stopped, and the column washing valve 21, and the column washing water is stopped, and the column washing valve is stopped;

8. column switching in series 3: when column 3 and column 1 are run in series to M in step 5₁When the adsorption rate is less than or equal to A, indicating that the target substances in the raw water adsorbed by the resin in the column 3 are nearly saturated, closing the valve 7, the valve 8, the valve 10 and the valve 3, and switching to the series concurrent flow operation of the column 1 and the column 2 according to the step 1;

9. recovery of raw water in column 3 and resin washing before regeneration: in step 8, while closing the valves 7, 8, 10 and 3, opening the valves 24 and 30, allowing column washing water to enter the column 3 through the valve 24 and the lower connecting pipe 3, ejecting raw water in the column 3 by the column washing water, returning the raw water to a raw water pool through the upper connecting pipe 3 and the valve 30 for recycling, when the column washing water reaches a set amount, the raw water in the column 3 is ejected by the column washing water, closing the valve 30, opening the valve 27, continuously washing resin by countercurrent flow by the column washing water, discharging column washing wastewater into a column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, and when the column washing water reaches the set amount, stopping column washing water entering, closing the valve 27, and completely washing the resin in the column 3 to start the next step of regeneration;

10. regeneration of resin in column 3: when the valve 27 is closed and the valve 25 is opened in the step 9, a quantitative regenerant enters the column 3 through the valve 24 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is regenerated, the regenerant in the column 3 enters the regenerant treatment system through the upper connecting pipe 3, the valve 25 and the T5, when the regenerant entering the column 3 reaches a set amount, the regenerant is stopped entering, the column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, the regenerant in the column 3 is pushed into the regenerant treatment system through the upper connecting pipe 3, the valve 25 and the T5, when the color value of T5 is less than or equal to B, the valve 25 is closed and the valve 27 is opened, the column washing wastewater enters the column 3 through the upper connecting pipe 3, the valve 27 and the T4 to wash the column washing wastewater treatment system through countercurrent washing the resin, when the column washing water reaches the set amount, the valve 24 and the valve 27 are closed, the valve 23 and the valve 26 are opened, the column washing water enters the column 3 through the valve 23 and the upper connecting pipe 3, then the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26 and the T4, when the downstream washing valve 23 and the washing valve 23 is closed, the column washing water is not less than C, the lower valve 26, and the column washing valve is detected, and the column washing value is equal to finish the detection of the column washing wastewater, and the detection of the column washing water is finished;

11. repeating the steps 2-10.

12. And T3 is to ensure that the content of copper ions in the water after the cross-linking does not exceed the standard, and once the T4 chromaticity detection value exceeds a set value, the series connection columns are switched according to the steps 2, 5 and 8 and continue to operate according to the subsequent steps.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The utility model provides a double column series connection circulation is continuous operation ion exchange system in turn, mainly by former pond, intake pump, TI-T5 on-line measuring appearance, 1-30 valves, pipeline and three ion exchange columns pass through the pipe connection and constitute, its characterized in that: the raw water pool is connected with the upper part of an ion exchange column 1 through a water inlet pump, a T1 online detector, a pipeline, a valve 1 and an upper connecting pipe 1, the bottom of the column 1 is connected with the upper part of the ion exchange column 2 through a lower connecting pipe 1, a valve 2, a T2 online detector, a pipeline, a valve 11 and an upper connecting pipe 2, and the bottom of the column 2 is connected with a post-cross water treatment system through the lower connecting pipe 2, the valve 6, a T3 online detector and the pipeline;

the raw water pool is connected with the upper part of the column 2 through a water inlet pump, a T1, a pipeline, a valve 4 and an upper connecting pipe 2; the bottom of the column 2 is connected with the upper part of the ion exchange column 3 through a lower connecting pipe 2, a valve 5, a valve T2, a pipeline, a valve 12 and an upper connecting pipe 3, and the bottom of the column 3 is connected with a water treatment system after cross-linking through the lower connecting pipe 3, the valve 9, the valve T3 and the pipeline;

the raw water pool is connected with the upper part of the column 3 through a water inlet pump, a T1, a pipeline, a valve 7 and an upper connecting pipe 3; the bottom of the column 3 is connected with the upper part of the column 1 through the lower connecting pipe 3, the valve 8, the valve 2, the pipeline, the valve 10 and the upper connecting pipe 1, and the bottom of the column 1 is connected with a post-cross water treatment system through the lower connecting pipe 1, the valve 3, the valve T3 and the pipeline;

a regenerant, a transforming agent or countercurrent column washing water is connected with the column 1 through a pipeline, a valve 14 and the lower connecting pipe 1; the downstream column washing water is connected with the column 1 through a pipeline, a valve 13 and an upper connecting pipe 1; the regenerated liquid of the resin is sent to a regenerated liquid treatment system through an upper connecting pipe 1, a valve 15, a pipeline and a T5; the resin-transformed liquid and the countercurrent column washing wastewater enter a column washing wastewater treatment system through an upper connecting pipe 1, a valve 17, a pipeline and T4; the downstream column washing wastewater enters a column washing wastewater treatment system through a lower connecting pipe 1, a valve 16, a pipeline and a T4; the raw water in the column 1 returns to the raw water pool through the upper connecting pipe 1, the valve 28 and the pipeline;

the regenerant, the transforming agent or the countercurrent column washing water is connected with the column 2 through a pipeline, a valve 19 and a lower connecting pipe 2; the downstream column washing water is connected with the column 2 through a pipeline, a valve 18 and an upper connecting pipe 2; the resin regeneration liquid is sent to a regeneration liquid treatment system through an upper connecting pipe 2, a valve 20, a pipeline and a T5; the resin transformation liquid and the countercurrent column washing wastewater enter a column washing wastewater treatment system through an upper connecting pipe 2, a valve 22, a pipeline and T4; the downstream column washing wastewater passes through the lower connecting pipe 2, the valve 21, the pipeline and the T4 to a column washing wastewater treatment system; the raw water in the column 2 returns to the raw water pool through the upper connecting pipe 2, the valve 29 and the pipeline;

a regenerant, a transformation agent or countercurrent column washing water is connected with the column 3 through a pipeline, a valve 24 and a lower connecting pipe 3; the downstream column washing water is connected with the column 3 through a pipeline, a valve 23 and an upper connecting pipe 3; resin regeneration liquid is sent to a regeneration liquid treatment system through an upper connecting pipe 3, a valve 25, a pipeline and T5; the resin transformation liquid and the countercurrent column washing wastewater enter a column washing wastewater treatment system through an upper connecting pipe 3, a valve 27, a pipeline and T4; smoothly washing the column waste water to a column waste water treatment system through a lower connecting pipe 3, a valve 26, a pipeline and T4; the raw water in the column 3 returns to the raw water pool through the upper connecting pipe 3, the valve 30 and the pipeline.

2. The dual column series cycle alternating continuous operation ion exchange system of claim 1, wherein: the pipeline of the valve 1, the valve 10, the valve 13, the valve 15, the valve 17 and the valve 28, which is communicated with the upper part of the column 1, is an upper connecting pipe 1, and the pipeline of the valve 2, the valve 3, the valve 14 and the valve 16, which is communicated with the bottom of the column 1, is a lower connecting pipe 1;

the pipeline of the valve 4, the valve 11, the valve 18, the valve 20, the valve 22 and the valve 29 which are communicated with the upper part of the column 2 is an upper connecting pipe 2, and the pipeline of the valve 5, the valve 6, the valve 19 and the valve 21 which are communicated with the bottom of the column 2 is a lower connecting pipe 2;

3. The dual column series cycle alternating continuous operation ion exchange system of claim 1, wherein: raw water in a raw water pool enters the upper part of a column 1 through a water inlet pump, a pipeline, a T1, a valve 1 and an upper connecting pipe 1, enters the upper part of the column 2 from a lower connecting pipe 1, a valve 2, a T2, a pipeline, a valve 11 and an upper pipeline 2 at the bottom of the connecting column 1 after passing through a resin layer in the column 1, and is discharged to a post-treatment water treatment system from a lower connecting pipe 2, a valve 6, a T3 and a pipeline at the bottom of the connecting column 2 after passing through the resin layer in the column 2;

raw water in a raw water pool enters the upper part of a column 3 through a pump 1, a pipeline, a T1, a valve 7 and an upper connecting pipe 3, enters the upper part of the column 1 from a lower connecting pipe 3, a valve 8, a T2, a pipeline, a valve 10 and the upper connecting pipe 1 at the bottom of a connecting column 3 after passing through a resin layer in the column 3, and is discharged to a post-cross water treatment system from the lower connecting pipe 1, the valve 3, the T3 and the pipeline at the bottom of the connecting column 1 after passing through the resin layer in the column 1;

the regenerant enters the column 1 through the pipeline, the valve 14 and the lower connecting pipe 1, and the resin regenerated liquid is sent to a regenerated liquid treatment system through the valve 15, the pipeline and the T5; the transforming agent enters the column 1 through the pipeline, the valve 14 and the lower connecting pipe 1, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 17, the pipeline and the T4; the countercurrent column washing water enters the column 1 through the pipeline, the valve 14 and the lower connecting pipe 1, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17, the pipeline and the T4; the downstream column washing water enters the column 1 through the pipeline, the valve 13 and the upper connecting pipe 1, and the downstream column washing wastewater enters a column washing wastewater treatment system through the lower connecting pipe 1, the valve 16, the pipeline and the T4; the raw water in the column 1 returns to the raw water pool through the upper connecting pipe 1, the valve 28 and the pipeline;

the regenerant enters the column 2 through a pipeline, a valve 19 and a lower connecting pipe 2, and the resin regenerant is sent to a regenerant treatment system through a valve 20, a pipeline and T5; the transforming agent enters the column 2 through the pipeline, the valve 19 and the lower connecting pipe 2, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 22, the pipeline and the T4; the countercurrent column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22, the pipeline and the T4; the downstream column washing water enters the column 2 through the pipeline, the valve 18 and the upper connecting pipe 2, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21, the pipeline and the T4; the raw water in the column 2 returns to the raw water pool through the upper connecting pipe 2, the valve 29 and the pipeline;

the regenerant enters the column 3 through a pipeline, a valve 24 and a lower connecting pipe 3, and the resin regeneration liquid goes to a regeneration liquid treatment system through a valve 25, a pipeline and T5; the transforming agent enters the column 3 through the pipeline, the valve 24 and the lower connecting pipe 3, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 3, the valve 27, the pipeline and the T4; the countercurrent column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27, the pipeline and the T4; the downstream column washing water enters the column 3 through the pipeline, the valve 23 and the upper connecting pipe 3, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26, the pipeline and the T4; the raw water in the column 3 returns to the raw water pool through the upper connecting pipe 3, the valve 30 and the pipeline.

4. The dual column series cycle alternating continuous operation ion exchange system of claim 1, wherein: the system comprises 3 subsystems, namely a double-column alternate series continuous operation system consisting of a water inlet pump, valves 1-9 and corresponding pipelines; the online detection system consists of online detectors T1-T5, valves 10-12 and corresponding pipelines; the resin regeneration cleaning system consists of valves 13-30 and corresponding pipelines.

5. A double-column series-connection circulation alternate continuous operation ion exchange system is characterized in that: the column 1, the column 2 and the column 3 are filled with corresponding different resins according to different target objects contained in the recovered or removed raw water, and the operation principle and the steps are as follows:

step 1 starts to operate: opening the valve 1, the valve 2, the valve 11 and the valve 6, allowing raw water to enter the column 1 through the TI, the valve 1 and the upper connecting pipe 1 at a set flow rate, and after passing through a resin layer in the column 1, allowing the raw water to enter the column 2 through the lower connecting pipe 1, the valve 2, the T2, the valve 11 and the upper connecting pipe 2; then after passing through the resin layer of the column 2, the wastewater is discharged through the lower connecting pipe 2, the valve 6 and the T3 to become water after the water is delivered to a water treatment system after the water is delivered, and the system runs by connecting the column 1 and the column 2 in series and downstream;

the target in the raw water is firstly adsorbed by the resin in the column 1, the target which is not completely adsorbed by the resin in the column 1 or the target which leaks from the column 1 is continuously adsorbed by the resin in the column 2, the content of the target in the water after the cross-linking is ensured not to exceed a set value, and the recovery or removal rate of the target is ensured; in the operation process, the content of a target object in raw water is detected in advance by an online detector T1, the raw water passes through a column 1 and then is detected by an online monitor T2, then the raw water enters the column 2, the saturation of the raw water is gradually increased along with the increase of the adsorption of the target object by resin in the column 1, the target object which is not adsorbed or leaked in the raw water is also gradually increased, therefore, the detection value C2 of the T2 is increased and gradually approaches to the detection value C1 of the T1, when the ratio of C2/C1 or (C1-C2)/C1 reaches a set value M1 (the value of M1 is generally 0.5-1.0 or 0.5-0), the resin in the column 1 is close to saturation, and the raw water with the value of M1 is determined according to the content of the target object in the column, the time required by resin circulation saturation, the time required by resin regeneration and cleaning and the like; in the subsequent step, the online detection and control principles of the serial operation of the columns 2 and 3 and the columns 3 and 1 are the same;

step 2, switching of series columns 1: when the column 1 and the column 2 in the step 1 are operated in series until the value M1 reaches a set value, which indicates that the resin in the column 1 adsorbs a target object in raw water and is close to saturation, the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 4, the valve 5, the valve 12 and the valve 9 are opened, the raw water enters the column 2 through the pump 1, the TI, the valve 4 and the upper connecting pipe 2, passes through a resin layer in the column 2, enters the column 3 through the lower connecting pipe 2, the valve 5, the valve 2, the valve 12 and the upper connecting pipe 3, passes through a resin layer in the column 3, and is discharged to a post-cross water treatment system through the lower connecting pipe 3 and the valve 9; at this time, the system is switched to the operation of the columns 2 and 3 in series and downstream;

step 3, recovering raw water in the column 1 and cleaning resin before regeneration: a) If raw water in the column 1 is recycled, the content of components in the raw water needs to be controlled, when the valve 1, the valve 2, the valve 11 and the valve 6 are closed in the step 2, the valve 14 and the valve 28 are opened, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the raw water in the column 1 is ejected out by the column washing water and returns to a raw water pool for recycling through the upper connecting pipe 1 and the valve 28, when the column washing water reaches a set amount, the raw water in the column 1 is ejected out by the column washing water, the valve 28 is closed, the valve 17 is opened, the column washing water continuously washes resin in a counter-flow manner, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, when the column washing water reaches the set amount, the column washing water stops entering, and the resin in the column 1 is thoroughly cleaned and then starts to be regenerated in the next step; b) If the raw water in the column 1 is recycled, the content of components in the raw water does not need to be controlled, when the valve 1, the valve 2, the valve 11 and the valve 6 are closed in the step 2, the valve 14 and the valve 28 are opened, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 1 and the valve 28, when the column washing water enters to a set amount, the column washing water is stopped to enter, the valve 28 is closed, and the resin in the column 1 is thoroughly cleaned and then starts to be regenerated in the next step;

step 4, regeneration of resin in the column 1: a) If the content of the target object in the regeneration liquid needs to be controlled, the valve 17 is opened, a quantitative regeneration agent enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, column washing water in the column 1 is ejected by the regeneration liquid, passes through the upper connecting pipe 1, the valve 17 and the T4, is detected by the T4 and then goes to a column washing water treatment system, when the detection value of the T4 reaches a set value, the column washing water in the column 1 is indicated to be ejected by the regeneration liquid, the valve 17 is closed, the valve 15 is opened, and the regeneration liquid in the column 1 goes to the regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5; b) If the content of the target object in the regeneration liquid does not need to be controlled, the valve 15 is opened, a quantitative regenerant enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, and the regeneration liquid in the column 1 enters a regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5;

when the regenerant entering the column 1 reaches a set value, the regenerant is stopped to be fed, column washing water enters the column 1 again through the valve 14 and the lower connecting pipe 1, the regenerant in the column 1 is ejected out of the upper connecting pipe 1, the valve 15 and the T5 and is discharged into the regenerant treatment system after being detected by the T5, the detection value of the T5 is continuously changed along with the continuous ejection of the regenerant in the column 1 by the column washing water, when the detection value of the T5 reaches a set value, the regenerant is completely ejected by the column washing water, the valve 15 is closed, the valve 17 is opened, the column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, the resin is continuously washed in a countercurrent manner, when the column washing water enters the set value, the valve 14 and the valve 17 are closed, the valve 13 and the valve 16 are opened, the column washing water enters the column 1 through the valve 13 and the upper connecting pipe 1, then enters the column washing wastewater treatment system through the lower connecting pipe 1, the valve 16 and the T4, downstream washing of the resin is completed, the column washing water inlet valve 13 and the detection value and the regeneration stop valve 16 is closed, and the resin washing water stop the detection value is completed; the detection control principle of resin regeneration and cleaning in the column 2 and the column 3 in the subsequent step is the same;

step 5, resin transformation in column 1: when the valve 13 and the valve 16 are closed in the step 4, the valve 14 and the valve 17 are opened, a quantitative transforming agent enters the column 1 through the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 1 to reach a set amount, the column washing water enters the column 1 through the valve 14 and the lower connecting pipe 1, then goes to the column washing wastewater treatment system through the upper connecting pipe 1, the valve 17 and the T4, when the column washing water reaches the set amount, the valve 14 and the valve 17 are closed, the valve 13 and the valve 16 are opened, the column washing water enters the column 1 through the valve 13 and the upper connecting pipe, then goes to the column washing wastewater treatment system through the lower connecting pipe 1, the valve 16 and the T4 and is detected by the T4, when a detection value of the T4 reaches a set value, the resin washing in the column 1 is finished, the column washing water stops entering, the valve 13 and the valve 16 and the valve 17 and the valve 16 are closed, the step of transforming and the step of the step can be omitted for the same resin; after the resin regeneration, transformation and cleaning are completed, the column 1 waits for the next switching; the detection control principle of the transformation and cleaning of the column 2 and the column 3 in the subsequent step is the same;

step 6, switching of series columns 2: when the column 2 and the column 3 in the step 2 are operated in series until the value M1 reaches a set value, which indicates that the target object in the resin-adsorbed raw water in the column 2 is nearly saturated, the valve 4, the valve 5, the valve 12 and the valve 9 are closed, the valve 7, the valve 8, the valve 10 and the valve 3 are opened, the raw water enters the column 3 through the pump 1, the TI, the valve 7 and the upper connecting pipe 3, enters the column 1 through the resin layer in the column 3 and the lower connecting pipe 3, passes through the resin layer in the column 1 and then is discharged to a post-cross water treatment system through the lower connecting pipe 1 and the valve 3; at this time, the system is switched to the operation of the column 3 and the column 1 in series and downstream;

step 7, recovering raw water in the column 2 and cleaning resin before regeneration: a. if the raw water in the column 2 is recovered, the content of components in the raw water needs to be controlled, when the valve 4, the valve 5, the valve 12 and the valve 9 are closed in the step 6, the valve 19 and the valve 29 are opened, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, the raw water in the column 2 is ejected out by the column washing water and returns to a raw water pool for recovery through the upper connecting pipe 2 and the valve 29, when the column washing water reaches a set amount, the raw water in the column 2 is ejected out by the column washing water, the valve 29 is closed, the valve 22 is opened, the column washing water continuously carries out countercurrent washing on resin, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 2, the column washing water is stopped when the column washing water reaches the set amount, and the resin in the column 2 is thoroughly cleaned and then starts to be regenerated in the next step; b. if the raw water in the column 2 is recycled, the content of the components in the raw water does not need to be controlled, when the valve 4, the valve 5, the valve 12 and the valve 9 are closed in the step 6, the valve 19 and the valve 29 are opened, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, the resin in the column 2 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 2 and the valve 29, when the column washing water inlet reaches a set amount, the column washing water is stopped to enter, the valve 29 is closed, and the resin in the column 2 is thoroughly cleaned and then starts to be regenerated in the next step;

step 8, regeneration of resin in column 2: a. if the content of a target object in the regeneration liquid needs to be controlled, the valve 22 is opened, a quantitative regeneration agent enters the column 2 through the valve 19 and the lower connecting pipe 2 at a set flow rate, resin in the column 2 is regenerated, the regeneration liquid ejects column washing water in the column 2 out and goes to a column washing water treatment system through the upper connecting pipe 2, the valve 22 and the T4, when the detection value of the T4 reaches a set value, the column washing water in the column 2 is completely ejected by the regeneration liquid, the valve 22 is closed, the valve 20 is opened, and the regeneration liquid in the column 2 goes to the regeneration liquid treatment system through the upper connecting pipe 2, the valve 20 and the T5; b. if the content of the target object in the regeneration liquid does not need to be controlled, the valve 20 is opened, a quantitative regenerant enters the column 2 through the valve 19 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, and the regeneration liquid in the column 2 enters a regeneration liquid treatment system through the upper connecting pipe 2, the valve 20 and the T5;

when the regenerant entering the column 2 reaches a set value, the regenerant is stopped to be fed, column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2 again, the regenerated liquid in the column 2 is pushed into the regenerated liquid treatment system through the upper connecting pipe 2, the valve 20 and the T5, when a T5 detection value reaches the set value, the valve 20 is closed, the valve 22 is opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, when column washing water enters the set value, the valve 19 and the valve 22 are closed, the valve 18 and the valve 21 are opened, column washing water enters the column 2 through the valve 18 and the upper connecting pipe 2, then the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21 and the T4, when the detection value of the T4 reaches the set value, the column washing water stops to be fed, the valve 18 and the valve 21 are closed, and resin regeneration and cleaning are finished;

step 9 resin transformation in column 2: when the valve 18 and the valve 21 are closed in the step 8, the valve 19 and the valve 22 are opened, the quantitative transforming agent enters the column 2 through the valve 19 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, the transforming agent stops entering the column 2 after the transforming agent enters the column 2 to reach the set amount, the column washing water enters the column 2 through the valve 19 and the lower connecting pipe 2, then goes to the column washing wastewater treatment system through the upper connecting pipe 2, the valve 22 and the T4, when the column washing water enters the set amount, the valve 19 and the valve 22 are closed, the valve 18 and the valve 21 are opened, the column washing wastewater enters the column 2 through the valve 18 and the upper connecting pipe 2, then goes to the column washing wastewater treatment system through the lower connecting pipe 2, the valve 21 and the T4, when the detection value of the T4 reaches the set value, the column washing water stops entering, the valve 18 and the valve 21 are closed, and the resin transformation and the cleaning are finished; after the resin regeneration, transformation and cleaning are completed, the column 2 waits for the next switching;

step 10 tandem column switching 3: when the column 3 and the column 1 are operated in series in the step 6 until the value M1 reaches a set value, which indicates that the target object in the raw water adsorbed by the resin in the column 3 is nearly saturated, the valve 7, the valve 8, the valve 10 and the valve 3 are closed, and the operation is switched to the series-connection concurrent flow operation of the column 1 and the column 2 according to the step 1;

step 11, raw water recovery in column 3 and resin cleaning before regeneration: a. if the raw water in the column 3 needs to be controlled, when the valves 7, 8, 10 and 3 are closed in the step 10, the valves 24 and 30 are opened, the column washing water starts to enter the column 3 through the valves 24 and the lower connecting pipe 3, the raw water in the column 3 returns to a raw water tank through the upper connecting pipe 3 and the valves 30, when the column washing water reaches a set amount, the raw water in the column 2 is completely ejected out by the column washing water, the valves 30 are closed, the valves 27 are opened, the column washing water continues to carry out countercurrent washing on the resin, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 3, the valves 27 and the T4, when the column washing water reaches the set amount, the column washing water stops entering, and the resin in the column 3 is thoroughly cleaned and then starts to be regenerated in the next step; b. if the raw water in the column 3 is recycled, the content of components in the raw water does not need to be controlled, when the valve 7, the valve 8, the valve 10 and the valve 3 are closed in the step 10, the valve 24 and the valve 30 are opened, the column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, the resin in the column 3 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 3 and the valve 30, when the column washing water inlet reaches a set amount, the column washing water is stopped to enter, the valve 30 is closed, and the resin in the column 3 is thoroughly cleaned and then starts to be regenerated in the next step;

step 12 regeneration of resin in column 3: a. if the content of the target object in the regeneration liquid needs to be controlled, the valve 27 is opened, a quantitative regenerant enters the column 3 through the valve 24 and the lower connecting pipe 3 at a set flow rate, column washing water in the column 3 enters a column washing water treatment system through the upper connecting pipe 3, the valve 27 and the T4, when a detection value of the T4 reaches a set value, the valve 27 is closed, the valve 25 is opened, and the regeneration liquid in the column 3 enters the regeneration liquid treatment system through the upper connecting pipe 3, the valve 25 and the T5; b. if the content of the target object in the regeneration liquid is not required to be controlled, the valve 25 is opened, a quantitative regenerant enters the column 3 through the valve 24 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is regenerated, and the regeneration liquid in the column 3 is sent to a regeneration liquid treatment system through the upper connecting pipe 3, the valve 25 and the T5;

when the regenerant entering the column 3 reaches a set amount, the regenerant is stopped to enter, column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3 again, the regenerant in the column 3 is jacked into the regenerant treatment system through the upper connecting pipe 3, the valve 25 and the T5, when a T5 detection value reaches a set value, the valve 25 is closed, the valve 27 is opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, when the column washing water enters the set amount, the valve 24 and the valve 27 are closed, the valve 23 and the valve 26 are opened, the column washing water enters the column 3 through the valve 23 and the upper connecting pipe 3, then enters the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26 and the T4, when the detection value of the T4 reaches the set value, the column washing water stops entering, the valve 23 and the valve 26 are closed, and resin regeneration and cleaning are finished;

step 13 resin transformation in column 3: when the valve 23 and the valve 26 are closed in the step 12, the valve 24 and the valve 27 are opened, a quantitative transforming agent enters the column 3 through the valve 24 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, the transforming agent stops entering the column 3 after the transforming agent enters the column 3 to reach a set amount, the column washing water enters the column 3 through the valve 24 and the lower connecting pipe 3, then goes to the column washing wastewater treatment system through the upper connecting pipe 3, the valve 27 and the T4, when the column washing water reaches the set amount, the valve 24 and the valve 27 are closed, the valve 23 and the valve 26 are opened, the column washing wastewater enters the column 3 through the valve 23 and the upper connecting pipe 3, then goes to the column washing wastewater treatment system through the lower connecting pipe 3, the valve 26 and the T4, and when the detection value of the T4 exceeds the set value, the column washing water stops entering, the valve 23 and the valve 26 are closed, the resin transformation and the cleaning are finished; after the resin regeneration, transformation and cleaning are completed, the column 3 waits for the next switching;

step 14, repeating the step 2 to the step 13 to realize the continuous operation of the system;

step 15, the water after the raw water is adsorbed by the series columns, is detected by an online detector T3 and then discharged into a post-treatment system, wherein T3 is set for ensuring that the content of the target object in the water after the water is treated does not exceed a set value, in general, the water after the water is treated is detected online by T1 and T2, and is controlled according to a set value M1 to ensure the normal and continuous operation of the system, but in abnormal conditions, including but not limited to conditions that the water quality exceeds a normal range, the value M1 is set too high or too low, part of resin is invalid or poor in regeneration, equipment faults and the like, the detection value T3 exceeds the set value, once the value T3 exceeds the standard, the resin columns are automatically switched to continue to operate, and meanwhile, the system is required to be subjected to operations of process parameter and operation program adjustment or fault removal and the like.

6. The utility model provides a double column series connection circulation is continuous operation ion exchange system in turn, is mainly formed by former pond, intake pump, TI-T5 on-line detector, 1-28 valves and three ion exchange column through the pipe connection, its characterized in that: the raw water pool is connected with the upper part of a column 1 through a water inlet pump, a T1, a pipeline, a valve 1 and an upper connecting pipe 1, the bottom of the column 1 is connected with the upper part of a column 2 through a lower connecting pipe 1, a valve 2, a T2, a pipeline, a valve 11 and an upper connecting pipe 2, and the bottom of the column 2 is connected with a post-treatment water treatment system through the lower connecting pipe 2, a valve 6, a T3 and a pipeline;

regenerant, transforming agent or countercurrent column washing water passes through a pipeline, a valve 27, a pipeline, a valve 20 and a lower connecting pipe 3 connecting column 3, downstream column washing water passes through a pipeline, a valve 28, a pipeline, a valve 19 and an upper connecting pipe 3 connecting column 3, resin regeneration liquid passes through the upper connecting pipe 3, a valve 21, a pipeline and a T5 column washing wastewater treatment system, resin transforming liquid and countercurrent column washing wastewater pass through the upper connecting pipe 3, the valve 19, the pipeline, a valve 25, the pipeline and the T4 column washing wastewater treatment system, and downstream column washing wastewater passes through the lower connecting pipe 1, the valve 20, the pipeline, the valve 26, the pipeline and the T4 column washing wastewater treatment system.

7. The dual column series cycle alternating continuous operation ion exchange system of claim 6, wherein: the pipeline of the valve 1, the valve 10, the valve 13, the valve 15 and the valve 22, which is communicated with the upper part of the column 1, is an upper connecting pipe 1, and the pipeline of the valve 2, the valve 3 and the valve 14, which is communicated with the bottom of the column 1, is a lower connecting pipe 1;

8. The dual column series cycle alternating continuous operation ion exchange system of claim 6, wherein: raw water in the raw water pool enters the upper part of the column 1 through a water inlet pump, a pipeline, a TI, a valve 1 and an upper connecting pipe 1, passes through a resin layer in the column 1, enters the upper part of the column 2 through a lower connecting pipe 1, a valve 2, a T2, a pipeline, a valve 11 and an upper pipeline 2 at the bottom of the connecting column 1, passes through the resin layer in the column 2, and is discharged to a post-treatment water treatment system through a lower connecting pipe 2, a valve 6, a T3 and a pipeline at the bottom of the connecting column 2;

raw water in the raw water pool enters the upper part of the column 2 through the water inlet pump, the pipeline, the TI, the valve 4 and the upper connecting pipe 2, passes through the resin layer in the column 2, enters the upper part of the column 3 through the lower connecting pipe 2, the valve 5, the T2, the pipeline, the valve 12 and the upper connecting pipe 3 at the bottom of the connecting column 2, passes through the resin layer in the column 3, and is discharged to a post-treatment water treatment system through the lower connecting pipe 3, the valve 9, the T3 and the pipeline at the bottom of the connecting column 3;

the regenerant enters the column 1 through the pipeline, the valve 27, the pipeline, the valve 14 and the lower connecting pipe 1, and the resin regenerated liquid goes to a regenerated liquid treatment system through the valve 15, the pipeline and the T5; the transforming agent enters the column 1 through the pipeline, the valve 27, the pipeline, the valve 14 and the lower connecting pipe 1, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the pipeline, the valve 25, the pipeline and the T4; the countercurrent column washing water enters the column 1 through the pipeline, the valve 27, the pipeline, the valve 14 and the lower connecting pipe 1, and the countercurrent column washing wastewater passes through the upper connecting pipe 1, the valve 13, the pipeline, the valve 25, the pipeline and the T4 to a column washing wastewater treatment system; the downstream column washing water enters the column 1 through the pipeline, the valve 28, the pipeline, the valve 13 and the upper connecting pipe 1, and the downstream column washing wastewater enters the column washing wastewater treatment system through the lower connecting pipe 1, the valve 14, the pipeline, the valve 26, the pipeline and the T4;

the regenerant enters the column 2 through the pipeline, the valve 27, the pipeline, the valve 17 and the lower connecting pipe 2, and the resin regenerated liquid passes through the valve 18, the pipeline and the T5 to a regenerated liquid treatment system; the transforming agent enters the column 2 through the pipeline, the valve 27, the pipeline, the valve 17 and the lower connecting pipe 2, and the resin transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the pipeline, the valve 25, the pipeline and the T4; the countercurrent column washing water enters the column 2 through the pipeline, the valve 27, the pipeline, the valve 17 and the lower connecting pipe 2, and the countercurrent column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the pipeline, the valve 25, the pipeline and the T4; the downstream column washing water enters the column 2 through the pipeline, the valve 28, the pipeline, the valve 16 and the upper connecting pipe 2, and the downstream column washing wastewater enters a column washing wastewater treatment system through the lower connecting pipe 2, the valve 17, the pipeline, the valve 26, the pipeline and the T4;

9. The continuous series operation and circulation saturated ion exchange system of claim 1, wherein: the system comprises 3 subsystems, namely a double-column alternate series continuous operation system consisting of a water inlet pump, valves 1-9 and corresponding pipelines; the online detection system consists of online detectors T1-T5, valves 10-12 and corresponding pipelines; the resin regeneration cleaning system consists of valves 13-28 and corresponding pipelines.

10. A continuous series operation and cycle saturated ion exchange system characterized by: the column 1, the column 2 and the column 3 are filled with corresponding different resins according to different target objects contained in the recovered or removed raw water, and the operation principle and the steps are as follows:

step 1 starts to operate: the pump 1 is started, the valve 1, the valve 2, the valve 11 and the valve 6 are opened, raw water in a raw water pool enters the column 1 through the pump 1, the TI, the valve 1 and the upper connecting pipe 1 at a set flow rate, passes through a resin layer in the column 1, then enters the column 2 through the lower connecting pipe 1, the valve 2, the T2, the valve 11 and the upper connecting pipe 2; then after passing through the resin layer of the column 2, the wastewater is discharged through the lower connecting pipe 2, the valve 6 and the T4 to become water after the water is delivered to a water treatment system after the water is delivered, and the system runs by connecting the column 1 and the column 2 in series and downstream;

step 3, recovering raw water in the column 1 and cleaning resin before regeneration: a. if the raw water in the column 1 needs to be controlled, in the step 2, the valve 1, the valve 2, the valve 11 and the valve 6 are closed, the valve 27, the valve 14 and the valve 22 are opened, the column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the raw water in the column 1 is ejected by the column washing water and returns to a raw water pool for recycling through the upper connecting pipe 1 and the valve 22, when the column washing water reaches the set flow rate, the raw water in the column 1 is ejected by the column washing water, the valve 22 is closed, the valve 13 and the valve 25 are opened, the column washing water continues to carry out countercurrent resin cleaning, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, when the column washing water reaches the set flow rate, the column washing water is stopped, and the resin in the column 1 is thoroughly cleaned and then starts to be regenerated; b. if the raw water in the column 1 is recycled, the content of components in the raw water does not need to be controlled, when the valve 1, the valve 2, the valve 11 and the valve 6 are closed in the step 2, the valve 27, the valve 14 and the valve 22 are opened, the column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 1 and the valve 22, when the column washing water reaches the set amount, the column washing water is stopped to enter, the valve 22 is closed, and the next step of regeneration is started after the resin in the column 1 is thoroughly cleaned;

step 4, regeneration of resin in the column 1: a. if the content of the target object in the regeneration liquid needs to be controlled, the valve 13 and the valve 25 are opened, a quantitative regenerant enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, column washing water in the column 1 is ejected by the regeneration liquid, passes through the upper connecting pipe 1, the valve 13, the valve 25 and the T4 and is detected by the T4 and then goes to a column washing water treatment system, when the detection value of the T4 reaches a set value, the column washing water in the column 1 is ejected by the regeneration liquid completely, the valve 13 is closed, the valve 15 is opened, and the regeneration liquid in the column 1 goes to the regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5; b. if the content of the target object in the regeneration liquid does not need to be controlled, the valve 15 is opened, a quantitative regenerant enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is regenerated, and the regeneration liquid in the column 1 is sent to a regeneration liquid treatment system through the upper connecting pipe 1, the valve 15 and the T5;

when the regenerant entering the column 1 reaches a set value, the regenerant is stopped to enter, column washing water enters the column 1 again through the valve 27, the valve 14 and the lower connecting pipe 1, the regenerant in the column 1 is ejected out, the regenerant is discharged into the regenerant treatment system from the upper connecting pipe 1, the valve 15 and the T5, when a T5 detection value reaches the set value, the regenerant is ejected out completely by the column washing water, the valve 15 is closed, the valve 13 and the valve 25 are opened, column washing wastewater enters the column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, the resin is continuously washed in a counter current manner, when the column washing water enters the set value, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 1 through the valve 28, the valve 13 and the upper connecting pipe, then enters the column washing wastewater treatment system through the lower connecting pipe 1, the valve 14, the valve 26 and the T4, the resin is washed, and when the detection value of the T4 reaches the set value, the resin washing in the column 1 is finished, the column washing regeneration valve 26 and the resin is stopped to be washed;

step 5, resin transformation in column 1: when the valve 26 and the valve 28 are closed in the step 4, the valve 25 and the valve 27 are opened, the quantitative transforming agent enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1 at a set flow rate, the resin in the column 1 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, the transforming agent stops entering after the transforming agent enters the column 1 to reach the set amount, the column washing water enters the column 1 through the valve 27, the valve 14 and the lower connecting pipe 1, then goes to the column washing wastewater treatment system through the upper connecting pipe 1, the valve 13, the valve 25 and the T4, when the water inflow of the column washing water reaches a set amount, closing the valve 25 and the valve 27, opening the valve 26 and the valve 28, enabling the column washing water to enter the column 1 through the valve 28, the valve 13 and the upper connecting pipe, then enabling the column washing water to go to a column washing wastewater treatment system through the lower connecting pipe 1, the valve 14, the valve 26 and the T4 and after being detected by the T4, when the detection value of the T4 reaches a set value, completing resin washing in the column 1, stopping the water inflow of the column washing water, closing the valve 13, the valve 14, the valve 26 and the valve 28, completing resin transformation and washing, and omitting the step for the resin which does not need to be transformed, wherein the steps are the same as the following steps; after the resin regeneration, transformation and cleaning are completed, the column 1 waits for the next switching;

step 7, recovering raw water in the column 2 and cleaning resin before regeneration: a. if the raw water in the column 2 needs to be controlled, in step 6, while the valve 4, the valve 5, the valve 12 and the valve 9 are closed, the valve 27, the valve 17 and the valve 23 are opened, the column washing water enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the raw water in the column 2 is ejected by the column washing water and returns to a raw water pool for recycling through the upper connecting pipe 2 and the valve 23, when the column washing water reaches a set amount, the raw water in the column 2 is ejected by the column washing water, the valve 23 is closed, the valve 16 and the valve 25 are opened, the column washing water continues to carry out countercurrent washing on the resin, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, when the column washing water reaches the set amount, the column washing water is stopped, and the resin in the column 2 is thoroughly washed and then starts to be regenerated in the next step; b. if the raw water in the column 1 is recycled, the content of components in the raw water does not need to be controlled, when the valve 4, the valve 5, the valve 12 and the valve 9 are closed in the step 6, the valve 27, the valve 17 and the valve 23 are opened, the column washing water enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 2 and the valve 23, when the column washing water enters to a set amount, the column washing water is stopped to enter, the valve 23 is closed, and the next step of regeneration is started after the resin in the column 2 is thoroughly cleaned;

step 8, regeneration of resin in column 2: a. if the content of the target object in the regeneration liquid needs to be controlled, the valve 16 and the valve 25 are opened, a quantitative regenerant enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, column washing water in the column 2 is ejected out by the regeneration liquid and goes to a column washing water treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, when the detection value of the T4 reaches a set value, the column washing water in the column 2 is ejected out by the regeneration liquid, the valve 16 is closed, the valve 18 is opened, and the regeneration liquid in the column 2 goes to the regeneration liquid treatment system through the upper connecting pipe 2, the valve 18 and the T5; b. if the content of the target object in the regeneration liquid does not need to be controlled, the valve 18 is opened, a quantitative regenerant enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is regenerated, and the regeneration liquid in the column 2 is sent to a regeneration liquid treatment system through the upper connecting pipe 2, the valve 18 and the T5;

step 9, resin transformation in column 2: when the valve 26 and the valve 28 are closed in the step 8, the valve 25 and the valve 27 are opened, a quantitative transforming agent enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2 at a set flow rate, the resin in the column 2 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 2 to reach the set amount, the column washing water enters the column 2 through the valve 27, the valve 17 and the lower connecting pipe 2, then goes to the column washing wastewater treatment system through the upper connecting pipe 2, the valve 16, the valve 25 and the T4, when the column washing water enters the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 2 through the valve 28, the valve 16 and the upper connecting pipe, then goes to the column washing wastewater treatment system after the T4 detection value of the lower connecting pipe 2, the valve 17, the valve 16 and the valve 28 finish the column washing wastewater treatment system after the T4 detection value of the T4 reaches the set value; after the resin regeneration, transformation and cleaning are completed, the column 2 waits for the next switching;

step 10 tandem column switching 3: when the column 3 and the column 1 are operated in series in the step 9 until the value M1 reaches a set value, which indicates that the target object in the raw water adsorbed by the resin in the column 3 is nearly saturated, the valve 7, the valve 8, the valve 10 and the valve 3 are closed, and the operation is switched to the series-connection concurrent flow operation of the column 1 and the column 2 according to the step 1;

step 11, recovering raw water in the column 3 and cleaning resin before regeneration: a. if the raw water in the column 2 is recovered, the content of components in the raw water needs to be controlled, when the valve 7, the valve 8, the valve 10 and the valve 3 are closed in the step 10, the valve 27, the valve 20 and the valve 24 are opened, the column washing water enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the raw water in the column 3 is ejected out by the column washing water and returns to a raw water pool for recovery through the upper connecting pipe 3 and the valve 24, when the column washing water reaches the set flow rate, the raw water in the column 3 is ejected out by the column washing water, the valve 24 is closed, the valve 19 and the valve 25 are opened, the column washing water continues to carry out countercurrent resin cleaning, the column washing wastewater is discharged into a column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, when the column washing water reaches the set flow rate, the column washing water stops entering, and the resin in the column 3 is thoroughly cleaned and then starts to be regenerated in the next step; b. if the raw water in the column 2 is recycled, the content of components in the raw water does not need to be controlled, when the valve 7, the valve 8, the valve 10 and the valve 3 are closed in the step 10, the valve 27, the valve 20 and the valve 24 are opened, the column washing water enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is cleaned, the column washing wastewater returns to a raw water tank through the upper connecting pipe 3 and the valve 24, when the column washing water enters to a set amount, the column washing water is stopped to enter, the valve 24 is closed, and the next step of regeneration is started after the resin in the column 3 is thoroughly cleaned;

step 12 regeneration of resin in column 3: a. if the content of the target object in the regeneration liquid needs to be controlled, the valve 19 and the valve 25 are opened, a quantitative regenerant enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is regenerated, column washing water in the column 3 is ejected by the regeneration liquid, passes through the upper connecting pipe 3, the valve 19, the valve 25 and the T4 and goes to a column washing water treatment system through the T4, when the detection value of the T4 reaches a set value, the column washing water in the column 3 is indicated to be ejected by the regeneration liquid completely, the valve 19 is closed, the valve 21 is opened, and the regeneration liquid in the column 3 goes to the regeneration liquid treatment system through the upper connecting pipe 3, the valve 21 and the T5; b. if the content of the target object in the regeneration liquid does not need to be controlled, the valve 21 is opened, a quantitative regenerant enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is regenerated, and the regeneration liquid in the column 3 enters a regeneration liquid treatment system through the upper connecting pipe 3, the valve 21 and the T5;

step 13 resin transformation in column 3: when the valve 26 and the valve 28 are closed in the step 12, the valve 25 and the valve 27 are opened, a quantitative transforming agent enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3 at a set flow rate, the resin in the column 3 is transformed, the transforming liquid goes to a column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, the transforming agent stops entering the transforming agent after the transforming agent enters the column 3 to reach a set amount, the column washing water enters the column 3 through the valve 27, the valve 20 and the lower connecting pipe 3, then goes to the column washing wastewater treatment system through the upper connecting pipe 3, the valve 19, the valve 25 and the T4, when the column washing water enters the set amount, the valve 25 and the valve 27 are closed, the valve 26 and the valve 28 are opened, the column washing water enters the column 3 through the valve 28, the valve 19 and the upper connecting pipe, then goes to the column washing wastewater treatment system through the lower connecting pipe 3, the valve 20, the valve 19 and the T4, and the column washing wastewater treatment system is ended when the detection value of the T4 reaches a set value, the resin washing is finished, the column washing water inlet valve 20, the valve 19, the valve 28, the valve 19 and the valve 28 and the rotating valve 28 are closed; after the resin regeneration, transformation and cleaning are completed, the column 3 waits for the next switching;

step 15, the water after the raw water is adsorbed by the series columns, is detected by an online detector T3 and then discharged into a post-treatment system, wherein T3 is set for ensuring that the content of the target object in the water after the water is treated does not exceed a set value, generally, the water after the water is treated is detected online by T1 and T2, and is controlled according to a set value M1 to ensure the normal and continuous operation of the system, but in abnormal conditions, including but not limited to conditions that the water quality exceeds a normal range, the value M1 is set too high or too low, part of resin is invalid or poor in regeneration, or equipment is in fault, the detection value T3 exceeds the set value, once the value T3 exceeds the set value, the resin columns are automatically switched and continuously operated, and meanwhile, the operation such as process parameter adjustment and operation program adjustment or fault removal needs to the system.

11. The continuous series operation and circulation saturated ion exchange system according to claim 1, 3, 4, 5, 6, 8, 9, or 10, wherein: the online detectors of T1, T2, T3, T4 and T5 are pH online detectors, electronic flow meters, color difference online detectors or sensors, chromaticity online detectors or sensors, color sensors, oxidation electrode potential ORP online detectors, conductivity online detectors, online colorimeters or sensors, metal ion online detectors and the like, and 1 or a combination of more of the above detectors.

12. The continuous series operation and cycle saturated ion exchange system of claim 1 or 2 or 3 or 4 and claim 6 or 7 or 8 or 9, wherein: the valve is one or the combination of a plurality of manual valves, automatic valves and automatic valves with manual valve bypasses.