CN115259452B

CN115259452B - Continuous flow simulated moving bed sewage characteristic ion advanced treatment device and method

Info

Publication number: CN115259452B
Application number: CN202210851697.8A
Authority: CN
Inventors: 王木村; 徐绪筝; 虞红波
Original assignee: Beijing Globegroup Zhongke Water Technology Co ltd
Current assignee: Beijing Globegroup Zhongke Water Technology Co ltd
Priority date: 2022-06-09
Filing date: 2022-07-19
Publication date: 2023-08-18
Anticipated expiration: 2042-07-19
Also published as: CN115259452A

Abstract

The disclosure relates to the technical field of sewage treatment, in particular to a continuous flow simulated moving bed sewage characteristic ion advanced treatment device and method. The device comprises a pretreatment unit, a pH adjusting unit and a continuous flow simulated moving bed unit which are connected in sequence; the pretreatment unit is communicated with the sewage inlet, and a filter material is arranged in the pretreatment unit to intercept large-particle impurities in incoming water; the pH adjusting unit is arranged at the downstream of the pretreatment unit and is used for adjusting the sewage to an optimal adsorption condition; the continuous flow simulated moving bed unit is arranged at the downstream of the pH adjusting unit, the inside of the continuous flow simulated moving bed unit is provided with an adsorption filler, and the adsorption filler is used for continuously adsorbing characteristic ions in sewage and discharging water reaching standards. The continuous flow simulated moving bed sewage characteristic ion advanced treatment device provided by the disclosure can realize continuous flow uninterrupted operation, increases mass transfer power, and ensures the removal efficiency of the sewage characteristic ions.

Description

Continuous flow simulated moving bed sewage characteristic ion advanced treatment device and method

Technical Field

The disclosure relates to the technical field of sewage treatment, in particular to a continuous flow simulated moving bed sewage characteristic ion advanced treatment device and method.

Background

Due to the rapid development of economy in recent years in China, the problem of excessive heavy metal and excessive fluoride often exists in sewage discharged by industrial enterprises, and the sanitary standard of drinking water in China is difficult to reach (GB 5749-2006). The conventional fluorine-containing wastewater treatment method mainly comprises a chemical precipitation method and a coagulating sedimentation method, and is difficult to reach the requirement of below 1.0 mg/L; the heavy metal removing method mainly comprises a chemical precipitation method and a membrane method, the treatment degree of the former method is insufficient, the operation cost of the latter method is high, and the maintenance cost of equipment is high.

Disclosure of Invention

In order to solve the technical problems, the present disclosure provides a continuous flow simulated moving bed sewage characteristic ion advanced treatment device and a sewage treatment method.

The first aspect of the present disclosure provides a continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus, comprising: the pretreatment unit, the pH adjusting unit and the continuous flow simulated moving bed unit are connected in sequence;

the pretreatment unit is communicated with the sewage inlet, and a filter material is arranged in the pretreatment unit to intercept large-particle impurities in incoming water;

The pH adjusting unit is arranged at the downstream of the pretreatment unit and is used for adjusting the sewage to an optimal adsorption condition;

the continuous flow simulated moving bed unit is arranged at the downstream of the pH adjusting unit, selective adsorption filler is filled in the continuous flow simulated moving bed unit and used for continuously adsorbing characteristic ions in sewage and discharging water reaching standards.

Further, the pretreatment unit comprises a first sewage pump, a first stop valve, a second stop valve, a first electromagnetic flowmeter and a sand filtering device;

the first stop valve water inlet is communicated with the container sewage inlet, the first stop valve outlet is communicated with the first sewage pump inlet, the first sewage pump outlet is connected with the first electromagnetic flowmeter inlet end, and the first electromagnetic flowmeter outlet end is connected with the sand filter device inlet end so as to be used for filtering out large-particle impurities.

Further, the pH adjusting unit comprises a first adjusting tank and a first buffer tank, a first retaining wall is arranged between the first adjusting tank and the first buffer tank, and a first connecting channel is arranged at the bottom of the first retaining wall;

The first regulating tank is provided with a first mechanical stirring device, a first pH on-line monitoring device and a first dosing device;

the downstream of the first buffer tank is connected with a second sewage pump, an outlet of the second sewage pump is communicated with a fourth stop valve, the downstream of the fourth stop valve is connected with a second electromagnetic flowmeter, and the second electromagnetic flowmeter is used for flow regulation of the continuous flow simulated moving bed unit.

Further, the continuous flow simulated moving bed unit comprises a plurality of resin columns forming an adsorption zone, a regeneration zone and a spare zone, respectively.

Further, the resin column comprises an outer layer and an inner layer, and the outer layer is sleeved outside the inner layer;

the inner layer is provided with a filler, and the outer wall of the inner layer is provided with an electroplating heating film.

Further, a first screen is arranged at the top of the inner layer, and a second screen is arranged at the bottom of the inner layer;

the mesh number of the first screen is 5-35 meshes, and the mesh number of the second screen is 5-35 meshes.

Further, the first screen or the second screen comprises a first circular ring structure and a central circular screen which are arranged in a stacked mode.

Further, a temperature control device is arranged at the top of the resin column, and a characteristic pollution ion monitoring device is arranged at the bottom of the resin column.

Further, the inner layer comprises a middle area, and a top area and a bottom area which are positioned at two ends of the middle area, wherein the filler in the top area and the filler in the bottom area are large-particle alumina or metal cation adsorption resin, and the particle size of the large-particle alumina or metal cation adsorption resin is 1-6 mm; the filler in the middle area is fluorine-removing or metal-removing cationic resin, and the particle size of the fluorine-removing or metal-removing cationic resin is 0.3-3 mm.

Further, an auxiliary unit is arranged at the downstream of the continuous flow simulated moving bed unit;

the auxiliary unit comprises a standard reaching water tank, a regenerant tank, a running water tank and a regenerant waste liquid tank;

the standard reaching water tank is arranged at the downstream of the continuous flow simulated moving bed unit and is used for receiving standard reaching water of the discharge system;

the regenerant waste liquid pool is arranged at the downstream of the continuous flow simulated moving bed unit and is used for receiving the regenerant waste liquid of the discharge system.

Further, the up-to-standard pond includes second equalizing basin and second buffer tank, the second equalizing basin with be equipped with the second barricade between the second buffer tank, the second barricade is equipped with the second connecting channel, the second equalizing basin is equipped with second mechanical stirring device, second pH on-line monitoring device and second charge device.

Further, the downstream of the regenerant pool is connected with a regenerant pump, the outlet end of the regenerant pump is communicated with a regenerant heat exchanger, the outlet of the regenerant heat exchanger is communicated with a sixth stop valve, and the outlet of the sixth stop valve can be connected with the lower end of the resin column.

Further, the outlet end of the tap water tank is communicated with the inlet end of the tap water pump, the outlet end of the tap water pump is communicated with the seventh stop valve, and the seventh stop valve is connected with the sixth stop valve through a tee joint.

A second aspect of the present disclosure provides a sewage treatment method, comprising the steps of:

the adsorption process comprises the steps of opening a front valve of an upper end column and a right valve of a lower end column of a resin column, closing the right valve of the upper end column of the resin column, closing the rear valve of the lower end column of the resin column, so that wastewater flows from the top of the resin column to the top bottom of the resin column, a communicating pipeline is arranged between two adjacent resin columns, and the wastewater enters the next resin column from the communicating pipeline, and repeating the operation to complete the adsorption process;

preferably, the flow rate of the wastewater flowing from the top of the resin column to the bottom of the resin column is preferably in the range of 1 to 10 times of the filler volume/h.

Further, the regeneration process comprises the steps of opening a rear valve of a lower end column of the resin column and a front valve of an upper end column, closing a right valve of the lower end column of the resin column, closing a right valve of the upper end column of the resin column, and enabling the regenerant to enter the top of the resin column from the bottom of the resin column.

Further, the regeneration process is completed in a regeneration zone, and the regeneration zone adopts a lower-inlet upper-outlet elution mode;

further, the regeneration temperature is controlled at 20-60 ℃, and the elution flow rate is preferably carried out within the range of 1-5 times of the filler volume/h;

further, the regenerant adopts 5 to 30 percent of acid or alkali solution;

further, the regeneration time is controlled to be 30-60 min;

further, after the regeneration is completed, the residual regenerant is ejected to a regenerant waste liquid pool by tap water at a hollow tower flow rate of 1 to 10 times of the packing volume/h.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

(1) The floor area is small, the integration level is high, the automation degree is high, and the movable operation is convenient.

(2) Continuous flow uninterrupted operation can be realized, mass transfer power is increased, and the removal efficiency of characteristic ions or metal cations in wastewater is ensured.

(3) The loss rate of the selective adsorption filling material can be reduced, and the utilization rate of the selective adsorption filling material can be improved.

(4) The concentration of characteristic ions in sewage can be ensured to always meet the discharge requirement, and the characteristic ions or metal cations are removed by adopting a continuous flow simulated moving bed method, so that the adding cost of a large amount of medicaments is reduced, and the comprehensive treatment cost is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus according to an embodiment of the disclosure;

FIG. 2 is a schematic diagram of a resin column in a continuous flow simulated moving bed wastewater characteristic ion deep treatment apparatus according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a resin column flange in a continuous flow simulated moving bed wastewater characteristic ion advanced treatment apparatus according to an embodiment of the disclosure;

FIG. 4 is a schematic diagram of the structure of a screen in a continuous flow simulated moving bed wastewater characteristic ion deep treatment apparatus according to an embodiment of the disclosure.

Reference numerals: 13. a container; 1. a preprocessing unit; 1-1, a first stop valve; 1-2, a first sewage pump; 1-3, a second stop valve; 1-4, a first electromagnetic flowmeter; 1-5, a sand filtering device; 8. a pH adjusting unit; 8-1, a third stop valve; 8-2, a first regulating tank; 8-3, a first buffer pool; 8-4, a first mechanical stirring device; 8-5, a first pH on-line monitoring device; 8-6, a first retaining wall; 8-7, a first connecting channel; 8-8, a second sewage pump; 8-9, a fourth stop valve; 8-10, a first medicine adding device; 8-11, a second electromagnetic flowmeter; 14. a continuous flow simulated moving bed unit; 2. a first resin column; 2-1, a first thermometer; 2-2, a first characteristic pollution ion monitoring device; 2-3, a first sampling port; 2-4, a second sampling port; 2-5, a first four-way front stop valve; 2-6, a first four-way right stop valve; 2-7, a second four-way right stop valve; 2-8, a second four-way rear stop valve; 2-9, a first communication pipeline; 3. a second resin column; 3-1, a second thermometer; 3-2, a second characteristic pollution ion monitoring device; 3-3, a third sampling port; 3-4, a fourth sampling port; 3-5, a third four-way front stop valve; 3-6, a third four-way left stop valve; 3-7, a third four-way right stop valve; 3-8, a fourth four-way left stop valve; 3-9, a fourth four-way right stop valve; 3-10, a fourth four-way rear stop valve; 3-11, a second communication pipeline; 4. a third resin column; 4-1, a third thermometer; 4-2, a third characteristic pollution ion monitoring device; 4-3, a fifth sampling port; 4-4, a sixth sampling port; 4-5, a fifth four-way front stop valve; 4-6, a fifth four-way left stop valve; 4-7, a fifth four-way right stop valve; 4-8, a sixth four-way left stop valve; 4-9, a sixth four-way right stop valve; 4-10, a sixth four-way rear stop valve; 4-11, a third communication pipeline; 5. a fourth resin column; 5-1, a fourth thermometer; 5-2, a fourth characteristic pollution ion monitoring device; 5-3, a seventh sampling port; 5-4, an eighth sampling port; 5-5, a seventh four-way front stop valve; 5-6, a seventh four-way left stop valve; 5-7, a seventh four-way right stop valve; 5-8, an eighth four-way left stop valve; 5-9, an eighth four-way right stop valve; 5-10, an eighth four-way rear stop valve; 5-11, a fourth communication pipeline; 6. a fifth resin column; 6-1, a fifth thermometer; 6-2, a fifth characteristic pollution ion monitoring device; 6-3, a ninth sampling port; 6-4, a tenth sampling port; 6-5, a ninth four-way front stop valve; 6-6, a ninth four-way left stop valve; 6-7, a ninth four-way right stop valve; 6-8, a tenth four-way left stop valve; 6-9, a fourteenth right stop valve; 6-10, a fourteenth through rear stop valve; 6-11, a fifth communication pipeline; 7. a sixth resin column; 7-1, a sixth thermometer; 7-2, a sixth characteristic pollution ion monitoring device; 7-3, eleventh sampling port; 7-4, a twelfth sampling port; 7-5, an eleventh four-way front stop valve; 7-6, an eleventh four-way left stop valve; 7-7, a twelfth four-way left stop valve; 7-8, a twelfth four-way rear stop valve; 15. an auxiliary unit; 9. a water pool reaching the standard; 9-1, a fifth stop valve; 9-2, a second mechanical stirring device; 9-3, a second pH on-line monitoring device; 9-4 a second dosing device; 9-5, a second regulating tank; 9-6, a second buffer pool; 9-7, a second connecting channel; 9-8, a second retaining wall; 10. a regenerant pool; 10-1, a regenerant pump; 10-2, a regenerant heat exchanger; 10-3, a sixth stop valve; 10-4, first quick connection; 10-5, second quick connection; 10-6, third quick connection; 10-7, fourth quick connection; 10-8, fifth quick connection; 10-9, a sixth quick joint; 10-11, a seventh stop valve; 10-12, running water pump; 11. a regenerant waste reservoir; 11-1, an eighth stop valve; 12. a heat preservation device; 12-1, a water inlet pipeline; 12-2, a regenerant waste liquid outlet pipeline; 16. a PLC automatic control system; 17. a tap water pool; 212. a first screen; 213. a second screen; 2121. a first annular structure; 2122. a central circular screen; 201. a first nut; 202. a first upper flange; 203. a first lower flange; 2031. a first screw hole; 2032. a second screw hole; 2033. a third screw hole; 2034. a fourth screw hole; 2035. a center circle; 2036. a water passing hole; 204. an outer layer; 205. a first filler; 206. heating the film; 207. a third filler; 208. a second nut; 209. a second lower flange; 210. a second upper flange; 211. a second filler; 12-3, a standard water outlet pipeline; 12-4, a regenerant water inlet pipeline.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

Because of the rapid economic development in China, the problems of excessive heavy metal and excessive fluoride in sewage discharged by industrial enterprises are often solved, and the sanitary standard of drinking water in China (GB 5749-2006) is difficult to reach, based on the problems, the embodiment of the disclosure provides a continuous flow simulated moving bed sewage characteristic ion advanced treatment device and a sewage treatment method, different fillers can be selected according to treated characteristic ions, the whole operation flow is continuous, intermittent operation is not needed, and the treatment efficiency is ensured.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus provided in the embodiment of the present disclosure includes a pretreatment unit 1, a pH adjustment unit 8 and a continuous flow simulated moving bed unit 14 connected in sequence; the pretreatment unit 1 is communicated with the sewage inlet, and a filter material is arranged in the pretreatment unit 1 to intercept large-particle impurities in incoming water, so that the pollution to a subsequent continuous flow simulated moving bed is reduced. The pH adjusting unit 8 is arranged at the downstream of the pretreatment unit 1, and the pH adjusting unit 8 is used for adjusting the sewage to an optimal adsorption condition; the continuous flow simulated moving bed unit 14 is arranged at the downstream of the pH adjusting unit 8, and selective adsorption filler is filled in the continuous flow simulated moving bed unit 14 and used for continuously adsorbing characteristic ions in sewage and discharging water reaching standards. The continuous flow simulated moving bed unit 14 can realize the adsorption and regeneration functions simultaneously, and ensures the continuous operation of the system. The continuous flow simulated moving bed sewage characteristic ion advanced treatment device provided by the disclosure can realize continuous flow uninterrupted operation, increases mass transfer power, and ensures the removal efficiency of the sewage characteristic ions. Characteristic ions such as fluorine or metal cations.

In some specific embodiments, the continuous flow simulated moving bed sewage characteristic ion advanced treatment device further comprises a container 13, wherein a pretreatment unit 1, a pH adjusting unit 8, a continuous flow simulated moving bed unit 14, an auxiliary unit 15 and a PLC automatic control system 16 are arranged in the container 13, and the auxiliary unit 15 realizes the functions of storing sewage, standard reaching water, regenerant and regenerant waste liquid, and even preserving heat and exchanging heat. The continuous flow simulated moving bed sewage characteristic ion advanced treatment device provided by the disclosure has the advantages of small occupied area, high integration level, high automation degree and convenience in mobile operation.

In some specific embodiments, the pretreatment unit 1 comprises a first sewage pump 1-2, a first stop valve 1-1, a second stop valve 1-3, a first electromagnetic flowmeter 1-4 and a sand filtering device 1-5; the water inlet of the first stop valve 1-1 is communicated with the sewage inlet of the container 13, the outlet of the first stop valve 1-1 is communicated with the inlet of the first sewage pump 1-2, the outlet of the first sewage pump 1-2 is connected with the inlet end of the first electromagnetic flowmeter 1-4 through the second stop valve 1-3, and the outlet end of the first electromagnetic flowmeter 1-4 is connected with the inlet end of the sand filter device 1-5 to filter out large-particle impurities. The sand filter device 1-5 may be a sand filter tank.

In some specific embodiments, the inlet end of the pH adjusting unit 8 is communicated with the outlet end of the sand filtering device 1-5; the pH adjusting unit 8 comprises a first adjusting tank 8-2 and a first buffer tank 8-3, a first retaining wall 8-6 is arranged between the first adjusting tank 8-2 and the first buffer tank 8-3, and a first connecting channel 8-7 is arranged at the bottom of the first retaining wall 8-6; the first regulating tank 8-2 is provided with a first mechanical stirring device 8-4, a first pH on-line monitoring device 8-5 and a first dosing device 8-10; the downstream of the first buffer pool 8-3 is connected with a second sewage pump 8-8, the outlet of the second sewage pump is communicated with a fourth stop valve 8-9, the downstream of the fourth stop valve 8-9 is connected with a second electromagnetic flowmeter 8-11, and the second electromagnetic flowmeter 8-11 is used for flow regulation of the continuous flow simulated moving bed unit 14.

Further, a third stop valve 8-1 at the inlet end of the pH adjusting unit 8 is communicated with the outlet end of the sand filtering device 1-5; the sewage is preliminarily filtered by the pretreatment unit 1 and then enters the first regulating tank 8-2, the first dosing device 8-10 is arranged in the first regulating tank 8-2, and the first dosing device 8-10 is used for dosing acid liquid/alkali liquid into the first regulating tank 8-2, so that the pH value of the sewage is regulated to a proper value, and preferably, the pH value is regulated to 7-11 (containing an end value). The first regulating tank 8-2 contains a first mechanical stirring device 8-4, which can accelerate the uniform mixing of acid liquor/alkali liquor and sewage. The first pH on-line monitoring device 8-5 is arranged in the first regulating tank 8-2 to cooperate with the dosage of the first dosing device 8-10 and monitor the pH value of sewage in real time. The downstream of the first regulating tank 8-2 is connected with a first buffer tank 8-3, and the sewage with the pH value regulated enters the first buffer tank 8-3. Preferably, the first regulating tank 8-2 is adjacent to the first buffer tank 8-3, and the first regulating tank 8-2 and the first buffer tank are separated by the first retaining wall 8-6, the bottom end of the first retaining wall 8-6 is provided with a first connecting channel 8-7 for sewage to flow into the first buffer tank 8-3 from the first regulating tank 8-2, so that the water quality of the continuous flow simulated moving bed discharged into the subsequent continuous flow simulated moving bed is stabilized.

In some embodiments, the inlet end of the continuous flow simulated moving bed unit 14 is connected to the outlet end of the second electromagnetic flowmeter 8-11. The continuous flow simulated moving bed unit 14 includes a plurality of resin columns that form an adsorption zone, a regeneration zone, and a spare zone, respectively.

As a preferred embodiment of the present invention, a continuous flow simulated moving bed unit 14 is connected downstream of the pH adjusting unit 8. Specifically, the outlet end of the second electromagnetic flowmeter 8-11 is communicated with the continuous flow simulated moving bed element water inlet pipeline 12-1. Further, the water inlet pipeline 12-1 is provided with a heat preservation device 12, and the heat preservation device 12 is preferably heat preservation cotton. Downstream of the water inlet line 12-1 is connected a continuous flow simulated moving sheet 14.

Preferably, the plurality of resin columns includes a first resin column 2, a second resin column 3, a third resin column 4, a fourth resin column 5, a fifth resin column 6, and a sixth resin column 7.

Preferably, the first resin column 2, the second resin column 3, the third resin column 4, and the fourth resin column 5 are connected in series as the adsorption zone. Sewage flows into the adsorption zone through the water inlet pipeline 12-1, the first four-way front stop valve 2-5 is opened, the first four-way right stop valve 2-6 is closed, the second four-way right stop valve 2-7 is opened, and the second four-way rear stop valve 2-8 is closed. The sewage enters the second resin column 3 through the first communication pipeline 2-9, the third four-way left stop valve 3-6 is opened, the third four-way front stop valve 3-5 and the third four-way right stop valve 3-7 are closed, the fourth four-way right stop valve 3-9 is opened, the fourth four-way left stop valve 3-8 is closed, and the fourth four-way rear stop valve 3-10 is closed. The sewage enters the third resin column 4 through the second communication pipeline 3-11, the fifth four-way left stop valve 4-6 is opened, the fifth four-way front stop valve 4-5 is closed, the fifth four-way right stop valve 4-7 is opened, the sixth four-way right stop valve 4-9 is opened, and the sixth four-way left stop valve 4-8 and the sixth four-way rear stop valve 4-10 are closed. The sewage enters the fourth resin column 5 through the third communication pipeline 4-11, the seventh four-way left stop valve 5-6 is opened, the seventh four-way front stop valve 5-5 and the seventh four-way right stop valve 5-7 are closed, the eighth four-way rear stop valve 5-10 is opened, the eighth four-way left stop valve 5-8 is closed, and the eighth four-way right stop valve 5-9 is closed; the eighth four-way rear stop valve 5-10 is communicated with a standard water outlet pipeline 12-3, and standard water is discharged to a standard water pool 9. Therefore, a complete serial adsorption channel is formed, continuous flow uninterrupted operation can be realized, mass transfer power is increased, the removal of characteristic ions of wastewater or the removal efficiency of metal cations is ensured, effluent is ensured to always meet the discharge requirement, the characteristic ions or the metal cations are removed by adopting a continuous flow simulated moving bed method, a large amount of reagent adding cost is reduced, and the comprehensive treatment cost is reduced.

The outlet of the second four-way rear stop valve 2-8 is communicated with the first quick connector 10-4, the outlet of the fourth four-way rear stop valve 3-10 is communicated with the second quick connector 10-5, the outlet of the sixth four-way rear stop valve 4-10 is communicated with the third quick connector 10-6, the outlet of the eighth four-way rear stop valve 5-10 is communicated with the fourth quick connector 10-7, the outlet of the tenth four-way rear stop valve 6-10 is communicated with the fifth quick connector 10-8, and the outlet of the twelfth four-way rear stop valve 7-8 is communicated with the sixth quick connector 10-9.

The top pipeline of the first resin column 2 is provided with a first sampling port 2-3, and the bottom pipeline is provided with a second sampling port 2-4. The top pipeline of the second resin column 3 is provided with a third sampling port 3-3, and the bottom pipeline is provided with a fourth sampling port 3-4. The top pipeline of the third resin column 4 is provided with a fifth sampling port 4-3, and the bottom pipeline is provided with a sixth sampling port 4-4. The top pipeline of the fourth resin column 5 is provided with a seventh sampling port 5-3, and the bottom pipeline is provided with an eighth sampling port 5-4. The top pipeline of the fifth resin column 6 is provided with a ninth sampling port 6-3, and the bottom pipeline is provided with a tenth sampling port 6-4. An eleventh sampling port 7-3 is arranged on the top pipeline of the sixth resin column 7, and a twelfth sampling port 7-4 is arranged on the bottom pipeline.

Further, the adsorption flow rate in the adsorption process is preferably 1 to 10 times of the filler volume/h.

According to a preferred embodiment of the invention, the outlet end of each resin column is provided with a characteristic pollution ion monitoring device, namely a first characteristic pollution ion monitoring device 2-2, a second characteristic pollution ion monitoring device 3-2, a third characteristic pollution ion monitoring device 4-2, a fourth characteristic pollution ion monitoring device 5-2, a fifth characteristic pollution ion monitoring device 6-2 and a sixth characteristic pollution ion monitoring device 7-2. And when characteristic ions in the effluent of the fourth resin column 5 of the last column of the adsorption zone exceed the warning value, the first resin column 2 of the adsorption zone is considered to reach adsorption saturation. At this time, the head column first resin column 2 is withdrawn, specifically, the first four-way front stop valve 2-5, the first four-way right stop valve 2-6, and simultaneously the second four-way rear stop valve 2-8, and the second four-way right stop valve 2-7 are closed.

The temperature control device comprises a first thermometer 2-1, a second thermometer 3-1, a third thermometer 4-1, a fourth thermometer 5-1, a fifth thermometer 6-1 and a sixth thermometer 7-1.

According to a preferred embodiment of the present invention, after the first resin column 2 of the first adsorption zone is saturated by adsorption, the second resin column 3 is used as the head column of the adsorption zone, and the third resin column 4, the fourth resin column 5 and the fifth resin column 6 are connected in series. At this time, sewage flows into the adsorption zone through the water inlet pipeline 12-1, the third four-way front stop valve 3-5 is opened, the third four-way left stop valve 3-6 is closed, the third four-way right stop valve 3-7 is opened, the fourth four-way right stop valve 3-9 is opened, the fourth four-way rear stop valve 3-10 is closed, and the fourth four-way left stop valve 3-8 is closed; the sewage enters the third resin column 4 through the second communication pipe 3-11. Opening a fifth four-way left stop valve 4-6, closing a fifth four-way front stop valve 4-5, a fifth four-way right stop valve 4-7, opening a sixth four-way right stop valve 4-9, closing a sixth four-way left stop valve 4-8 and a sixth four-way rear stop valve 4-10; the sewage enters the fourth resin column 5 through the third communication pipeline 4-11, the seventh four-way left stop valve 5-6 is opened, the seventh four-way front stop valve 5-5 is closed, the seventh four-way right stop valve 5-7 is opened, the eighth four-way right stop valve 5-9 is opened, the eighth four-way left stop valve 5-8 and the eighth four-way rear stop valve 5-10 are closed; the sewage enters the fifth resin column 6 through the fourth communication pipeline 5-11, the ninth four-way left stop valve 6-6 is opened, the ninth four-way front stop valve 6-5 is closed, the ninth four-way right stop valve 6-7 is opened, the tenth four-way rear stop valve 6-10 is opened, the tenth four-way left stop valve 6-8 is closed, and the tenth four-way right stop valve 6-9 is closed; the tenth four-way rear stop valve 6-10 is communicated with a standard water outlet pipeline 12-3, and standard water is discharged to a standard water pool 9. Therefore, a second complete serial adsorption channel is formed, continuous flow uninterrupted operation can be realized, mass transfer power is increased, and the removal efficiency of characteristic ions of wastewater or metal cations is ensured; the continuous flow operation can reduce the loss rate of the selective adsorption filling material and improve the utilization rate of the selective adsorption filling material; the method can ensure that the effluent always meets the discharge requirement, adopts the continuous flow simulated moving bed method to remove characteristic ions or metal cations, reduces the adding cost of a large amount of medicaments, and reduces the comprehensive treatment cost.

In some embodiments, the eleventh four-way left shut-off valve 7-6 is opened, the eleventh four-way front shut-off valve 7-5 is closed, the twelfth four-way left shut-off valve 7-7 is closed, and the wastewater enters the sixth resin column 7 through the fifth communication line 6-11.

And closing the twelfth four-way left stop valve 7-7, opening the twelfth four-way rear stop valve 7-8, and communicating the twelfth four-way rear stop valve 7-8 with the standard water outlet pipeline 12-3.

Further, the adsorption flow rate in the adsorption process is preferably 1 to 10 times of the volume of the selective adsorption packing per hour.

As a preferred embodiment of the present invention, when adsorption is started in the second serial adsorption channel, the withdrawn first resin column 2 may constitute a regeneration zone to start regeneration. Specifically, the outlet end of the regenerant pool 10 is communicated with a regenerant pump 10-1, in order to meet the regeneration of multiple temperature conditions and optimize the regeneration effect, the outlet end of the regenerant pump 10-1 is communicated with a regenerant heat exchanger 10-2, and the downstream of the regenerant heat exchanger 10-2 is connected with a sixth stop valve 10-3. When the first resin column 2 starts regeneration, the outlet end of the sixth stop valve 10-3 is communicated with the first quick connector 10-4, the second four-way rear stop valve 2-8 is opened, the second four-way right stop valve 2-7 is closed, the first four-way front stop valve 2-5 is opened, the first four-way right stop valve 2-6 is closed, the regenerant enters the first resin column 2 from the regenerant pool 10, the downstream of the first four-way front stop valve 2-5 is communicated with the regenerant waste liquid outlet pipeline 12-2 in a bottom-up flow mode, and after regeneration is completed, the regenerant waste liquid is discharged into the regenerant waste liquid pool 11. Further, the regeneration temperature in the regeneration zone process is preferably carried out within the range of 20-60 ℃, the regeneration flow rate is preferably carried out within the range of 1-5 times of the filler volume/h, the regeneration agent is preferably carried out by adopting acid or alkali solution within the range of 5% -30%, and optionally, the regeneration agent can be aluminum sulfate, and the regeneration time is preferably carried out within the range of 30-60 min.

The regenerant waste liquid outlet pipeline 12-2 is provided with an eighth stop valve 11-1.

Further, after the regeneration of the first resin column 2 is completed, the sixth stop valve 10-3 is closed, the seventh stop valve 10-11 is opened, tap water in the tap water tank 17 is used for ejecting the regenerant remained in the first resin column 2 to the regenerant waste liquid tank 11 at a hollow tower flow rate of 1-10 times of the filling volume/h, the first resin column 2 completes the regeneration cycle and can be used as a resin column in a standby area for storage, and the next cycle regeneration operation can be performed after the resin column in the next adsorption area is saturated in adsorption.

As a preferred embodiment of the present invention, the multi-heel resin column comprises a first resin column 2, a second resin column 3, a third resin column 4, a fourth resin column 5, a fifth resin column 6 and a sixth resin column 7, and the first resin column 2, the second resin column 3, the third resin column 4, the fourth resin column 5, the fifth resin column 6 and the sixth resin column 7 are completely identical in structure.

The first resin column 2 is exemplified and described in detail. The upper end and the lower end of the resin column are connected in a flange mode, the first upper flange 202 at the upper end of the resin column is in butt joint with the first lower flange 203, and the resin column is fixed with the first nut 201 through screws. The second upper flange 210 at the lower end of the resin column is butted with the second lower flange 209 and fixed with the second nut 208 by a screw. An interlayer gasket is arranged between the flange and the resin column. The gasket may be the first mesh 212 or the second mesh 213. The resin column is of a double-layer structure, the inner layer is filled with selective adsorption fillers with different particle sizes and different materials, and optionally, the selective adsorption fillers can be first filler 205, third filler 207 or second filler 211, the outer wall of the inner layer is wrapped with an electroplating heating film 206, and the resin column can be heated after being electrified, so that the temperature can be controlled within the range of 20-60 ℃, and meanwhile, the resin column is operated outdoors in cold weather, and the effect deterioration caused by low temperature can be easily prevented. The resin column outer layer 204 has a vacuum jacket structure, and can protect the electroplating heating film 206 while keeping the temperature. The top of the resin column is provided with a temperature control device, the temperature control device comprises a first thermometer 2-1, the temperature is automatically controlled by a PLC automatic control system 16 such as a PLC electric control cabinet, the required temperature is set in advance, and the resin column can be automatically started and stopped after the temperature is reached; the bottom is provided with a characteristic pollution ion monitoring device 2-2, and the concentration of the characteristic pollution ions and the historical data can be displayed in a PLC electric control cabinet.

Further, in order to optimize the adsorption effect and ensure the adsorption capacity, the ratio of the height to the diameter of the single resin column is more than 1.5, preferably 1.5 to 5 times.

Further, the first flange assembly includes a first upper flange 202 and a first lower flange 203; the second flange assembly includes a second upper flange 210 and a second lower flange 209. Optionally, the first flange assembly and the second flange assembly are identical in structure, and the first lower flange 203 and the second upper flange 210 are identical in structure. Taking the first flange assembly as an example, the outer circumference of the first lower flange 203 has four screw holes, namely, a first screw hole 2031, a second screw hole 2032, a third screw hole 2033, and a fourth screw hole 2034, for fixing. The central circle 2035 is in butt joint with the inner layer of the resin column, the central circle 2035 is of a porous structure and comprises a plurality of water passing holes 2036, so that bias current is prevented from being caused, uneven adsorption is avoided, and high-efficiency adsorption efficiency is guaranteed.

In some embodiments, the resin column comprises an outer layer and an inner layer, the outer layer being disposed outside of the inner layer; valves are arranged at the top and the bottom of the resin column so as to form a vacuum jacket layer between the outer layer 204 and the inner layer; the inner layer is provided with a filler, and the outer wall of the inner layer is provided with an electroplating heating film 206. According to one embodiment of the invention, the continuous flow simulated moving bed unit comprises resin columns with identical structural characteristics, wherein the top of the resin column is provided with a valve as a top sampling port, and the bottom of the resin column is provided with a valve as a bottom sampling port.

The resin column is of a double-layer structure, the inner layer is filled with selective adsorption filler, the outer wall of the inner layer is wrapped with an electroplating heating film 206, and the resin column can be heated up after being electrified, so that the temperature control operation within the range of 20-60 ℃ is realized; the outer layer is of a vacuum jacket structure, so that the heat preservation effect can be achieved; the top and bottom of the resin column are all connected in a flange mode.

In some embodiments, an interlayer first screen 212 is present between the resin column top end inner layer first flange assembly and the first filler 205, and an interlayer second screen 213 is present between the resin column bottom end inner layer second flange assembly and the second filler 211. The first screen 212 has a mesh size ranging from 5 mesh to 35 mesh, and the second screen 213 has a mesh size ranging from 5 mesh to 35 mesh. The flanges at the two ends of the resin column are partially contacted with the second filler 211 and the first filler 205 of the large-particle filler, and the middle of the resin column is provided with a screen mesh of 5-35 meshes to play a role of blocking so as to prevent the large-particle filler from leaking and blocking the pipeline. The mesh number of the first screen 212 or the second screen 213 may be, for example, 5 mesh, 6 mesh, 7 mesh, 8 mesh, 10 mesh, 12 mesh, 14 mesh, 16 mesh, 18 mesh, 20 mesh, 25 mesh, 30 mesh, 35 mesh, preferably 18 to 35 mesh.

As shown in fig. 4, and as an example of the first screen 212, the first screen 212 is formed of a central circular screen 2122 and a first circular ring structure 2121. Specifically, the first ring structure 2121 is a ring-shaped double-layer structure, and the central circular screen 2122 is disposed between the first ring structure 2121 and the second ring structure 2121, and is pressed after being bonded. The seal ring formed by the first ring structure 2121 may be made of polytetrafluoroethylene or silica gel, and is preferably made of silica gel. The central circular screen 2122 is stainless steel.

In some specific embodiments, the first screen 212 includes a first circular ring structure 2121 and a central circular screen 2122 in a stacked arrangement. The screen is formed by bonding stainless steel and sealable materials and pressing. Specifically, the outer layer is of a circular double-layer structure, a central circular screen is arranged in the middle layers of the upper and lower circular rings, and the central circular screen is pressed after being bonded. The double-layer sealing ring can be made of polytetrafluoroethylene or silica gel, and is preferably made of silica gel. The central circular screen is made of stainless steel. The joint of the resin column flange and the screen mesh is of a meshed screen plate structure. Can prevent the drift condition of water inflow and ensure higher efficiency.

In some specific embodiments, a temperature control device is arranged at the top of the resin column, and a characteristic pollution ion monitoring device is arranged at the bottom of the resin column.

In some specific embodiments, the inner layer comprises a middle region and a top region and a bottom region at two ends of the middle region, wherein the fillers in the top region and the bottom region are large-particle alumina or metal cation adsorption resin, namely a first filler 205, and the particle size of the large-particle alumina or metal cation adsorption resin first filler 205 is 1-6 mm; the filler in the middle region is a small particle defluorination or metal removal cationic resin, namely a third filler 206, and the particle size of the defluorination or metal removal cationic resin third filler 206 is 0.3-3 mm.

The resin column inner layer packing is divided into two layers, and the packing near both ends is large-particle characteristic ion adsorption packing (first packing 205), and the average particle diameter is in the range of 1 to 6mm, for example, 1mm,2mm,3mm,4mm,5mm,6mm, preferably 1 to 3mm. The intermediate layer third filler 207 is a small particle selective characteristic ion removing resin, and has an average particle diameter of 0.3 to 3mm, for example, 1mm,2mm,3mm, preferably 0.3 to 1.2mm.

In some embodiments, an auxiliary unit 15 is provided downstream of the continuous flow simulated moving bed unit 14; the auxiliary unit 15 comprises a standard reaching water tank 9, a regenerant tank 10, a running water tank 17 and a regenerant waste liquid tank 11; the standard reaching water tank 9 is arranged at the downstream of the continuous flow simulated moving bed unit 14 and is used for receiving standard reaching water discharged from the system; a regenerant waste liquid pond 11 is disposed downstream of the continuous flow simulated moving bed unit 14 for receiving the regenerant waste liquid exiting the system.

In some specific embodiments, the standard reaching water tank 9 comprises a second adjusting tank 9-5 and a second buffer tank 9-6, a second retaining wall 9-8 is arranged between the second adjusting tank 9-5 and the second buffer tank 9-6, the second retaining wall 9-8 is provided with a second connecting channel 9-7, and the second adjusting tank 9-5 is provided with a second mechanical stirring device 9-2, a second pH on-line monitoring device 9-3 and a second dosing device 9-4. The standard water outlet pipeline 12-3 is provided with a fifth stop valve 9-1.

In some specific embodiments, a regenerant pump 10-1 is connected downstream of the regenerant pond 10, the outlet end of the regenerant pump 10-1 is communicated with a regenerant heat exchanger 10-2, the outlet of the regenerant heat exchanger 10-2 is communicated with a sixth stop valve 10-3, and the outlet of the sixth stop valve 10-3 can be connected with the lower end of the resin column. Optionally, the outlet of the sixth shut-off valve 10-3 communicates with the regenerant inlet line 12-4.

In some embodiments, the outlet end of the tap water tank 17 is communicated with the inlet end of the tap water pump 10-12, the outlet end of the tap water pump 10-12 is communicated with the seventh stop valve 10-11, and the seventh stop valve 10-11 is connected with the sixth stop valve 10-3 through a tee joint.

A regenerant waste liquid pond 11 is disposed downstream of the continuous flow simulated moving bed unit 14 for receiving the regenerant waste liquid exiting the system.

The embodiment of the disclosure provides a sewage treatment method, which comprises the following steps:

Preferably, the flow rate of the wastewater flowing from the top of the resin column to the bottom of the resin column is preferably in the range of 1 to 10 times of the volume/h of the filler.

In some embodiments, the regeneration process includes opening a post-column valve at the lower end of the resin column, opening a pre-column valve at the upper end of the resin column, closing a right-column valve at the lower end of the resin column, and closing a right-column valve at the upper end of the resin column, wherein the regenerant enters the top of the resin column from the bottom of the resin column.

In some embodiments, the regeneration process is completed in a regeneration zone that employs a lower in upper out elution mode; preferably, the regeneration temperature is controlled at 20-60 ℃, and the elution flow rate is preferably carried out within the range of 1-5 times of the filler volume/h; preferably, the regenerant adopts 5 to 30 percent of acid or alkali solution; preferably, the regeneration time is controlled between 30min and 60min; preferably, after the regeneration is completed, the remaining regenerant is ejected to the regenerant waste liquid pool 11 by tap water at a superficial flow rate of 1 to 10 times of the packing volume/h.

Compared to prior art devices, embodiments of the present disclosure have at least the following advantages:

(1) The pretreatment unit, the pH adjusting unit, the continuous flow simulated moving bed unit and the auxiliary unit of the device are all arranged in the container 13, so that the device has small occupied area, high integration level and high automation degree and is convenient for mobile operation.

(2) The continuous flow simulated moving bed device disclosed by the invention can realize continuous flow uninterrupted operation, increases mass transfer power, and ensures the removal efficiency of fluoride ions or metal cations in wastewater.

(3) The invention adopts a simulated moving bed operation mode, can reduce the loss rate of the filler and improve the utilization rate of the selective adsorption filler.

(4) The device can ensure that the concentration of the characteristic ions in the sewage always meets the discharge requirement, and the characteristic ions or the metal cations are removed by adopting a continuous flow simulated moving bed method, so that the cost of adding a large amount of medicaments is reduced, and the comprehensive treatment cost is reduced.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The above is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A continuous flow simulated moving bed sewage characteristic ion advanced treatment device, which is characterized by comprising: the pretreatment unit (1), the pH adjusting unit (8) and the continuous flow simulated moving bed unit (14) are connected in sequence;

the pretreatment unit (1) is communicated with the sewage inlet, and a filter material is arranged in the pretreatment unit (1) to intercept large-particle impurities in incoming water;

the pH adjusting unit (8) is arranged at the downstream of the pretreatment unit (1), and the pH adjusting unit (8) is used for adjusting sewage to an optimal adsorption condition;

the continuous flow simulated moving bed unit (14) is arranged at the downstream of the pH adjusting unit (8), selective adsorption filler is filled in the continuous flow simulated moving bed unit (14), and the selective adsorption filler is used for continuously adsorbing characteristic ions in sewage and discharging water reaching the standard;

The pH adjusting unit (8) comprises a first adjusting tank (8-2) and a first buffer tank (8-3), a first retaining wall (8-6) is arranged between the first adjusting tank (8-2) and the first buffer tank (8-3), and a first connecting channel (8-7) is arranged at the bottom of the first retaining wall (8-6);

the first regulating tank (8-2) is provided with a first mechanical stirring device (8-4), a first pH on-line monitoring device (8-5) and a first dosing device (8-10);

a second sewage pump (8-8) is connected to the downstream of the first buffer tank (8-3), an outlet of the second sewage pump (8-8) is communicated with a fourth stop valve (8-9), a second electromagnetic flowmeter (8-11) is connected to the downstream of the fourth stop valve (8-9), and the second electromagnetic flowmeter (8-11) is used for flow regulation of the continuous flow simulated moving bed unit (14);

the continuous flow simulated moving bed unit (14) comprises a plurality of resin columns, wherein each resin column comprises an outer layer and an inner layer, the outer layer is sleeved outside the inner layer, the inner layer is provided with a filler, and the outer wall of the inner layer is provided with an electroplating heating film (206);

the top of the resin column is provided with a temperature control device, and the bottom of the resin column is provided with a characteristic pollution ion monitoring device;

the water tank (9) reaching the standard comprises a second regulating tank (9-5) and a second buffer tank (9-6), a second retaining wall (9-8) is arranged between the second regulating tank (9-5) and the second buffer tank (9-6), a second connecting channel (9-7) is arranged on the second retaining wall (9-8), and a second mechanical stirring device (9-2), a second pH on-line monitoring device (9-3) and a second dosing device (9-4) are arranged on the second regulating tank (9-5).

2. The continuous flow simulated moving bed sewage characteristic ion advanced treatment device according to claim 1, wherein the pretreatment unit (1) comprises a first sewage pump (1-2), a first stop valve (1-1), a second stop valve (1-3), a first electromagnetic flowmeter (1-4) and a sand filtering device (1-5);

the water inlet of the first stop valve (1-1) is communicated with the sewage inlet of the container, the outlet of the first stop valve (1-1) is communicated with the inlet of the first sewage pump (1-2), the outlet of the first sewage pump (1-2) is connected with the inlet end of the first electromagnetic flowmeter (1-4), and the outlet end of the first electromagnetic flowmeter (1-4) is connected with the inlet end of the sand filtering device (1-5) so as to be used for filtering out large-particle impurities.

3. The continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus of claim 1, wherein the plurality of resin columns form an adsorption zone, a regeneration zone and a spare zone, respectively.

4. A continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus as claimed in claim 3, wherein a first screen (212) is provided at the top of said inner layer, a second screen (213) is provided at the bottom of said inner layer, said first screen having a mesh size in the range of 5 mesh to 35 mesh, said second screen having a mesh size in the range of 5 mesh to 35 mesh.

5. The continuous flow simulated moving bed sewage characteristic ion deep treatment apparatus of claim 4, wherein the first screen (212) or the second screen (213) comprises a first circular ring structure (2121) and a central circular screen (2122) arranged in a stack.

6. The continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus as claimed in claim 1, wherein said inner layer comprises a middle region and top and bottom regions located at both ends of said middle region, said first filler (205) of said top region and said second filler (211) of said bottom region being both large particle alumina or metal cation adsorption resins having a particle size of 1mm to 6mm; the third filler (207) located in the middle area is fluorine-removing or metal-removing cationic resin, and the particle size of the fluorine-removing or metal-removing cationic resin is 0.3-3 mm.

7. The continuous flow simulated moving bed sewage characteristic ion advanced treatment device according to any one of claims 1 to 6, characterized in that an auxiliary unit (15) is provided downstream of the continuous flow simulated moving bed unit (14);

the auxiliary unit (15) comprises a standard reaching water tank (9), a regenerant tank (10), a tap water tank (17) and a regenerant waste liquid tank (11);

The standard reaching water tank (9) is arranged at the downstream of the continuous flow simulated moving bed unit (14) and is used for receiving standard reaching water of the discharge system;

the regenerant waste liquid pool (11) is arranged at the downstream of the continuous flow simulated moving bed unit (14) and is used for receiving the regenerant waste liquid of the discharge system.

8. The continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus as claimed in claim 7, wherein,

the downstream of the regenerant pool (10) is connected with a regenerant pump (10-1), the outlet end of the regenerant pump (10-1) is communicated with a regenerant heat exchanger (10-2), the outlet of the regenerant heat exchanger (10-2) is communicated with a sixth stop valve (10-3), and the outlet of the sixth stop valve (10-3) is connected with the lower end of the resin column.

9. The continuous flow simulated moving bed sewage characteristic ion advanced treatment device according to claim 7, wherein an outlet end of the tap water tank (17) is communicated with an inlet end of a tap water pump (10-12), an outlet end of the tap water pump (10-12) is communicated with a seventh stop valve (10-11), and the seventh stop valve (10-11) is connected with a sixth stop valve (10-3) through a tee joint;

10. A continuous flow simulated moving bed sewage characteristic ion advanced treatment method using the continuous flow simulated moving bed sewage characteristic ion advanced treatment apparatus according to any one of claims 1 to 9, characterized by comprising the steps of:

the adsorption process comprises the steps of opening a front valve of an upper end column of a resin column and a right valve of a lower end column, closing the right valve of the upper end column of the resin column, and closing the rear valve of the lower end column of the resin column, so that wastewater flows from the top of the resin column to the bottom of the resin column, a communicating pipeline is arranged between two adjacent resin columns, and the wastewater enters the next resin column from the communicating pipeline.

11. The continuous flow simulated moving bed sewage characteristic ion advanced treatment method as claimed in claim 10, wherein the flow rate of the wastewater flowing from the top of the resin column to the bottom of the resin column is preferably in the range of 1 to 10 times of the volume/h of the packing.

12. The continuous flow simulated moving bed sewage characteristic ion advanced treatment method of claim 10, wherein the regeneration process comprises opening a post-column valve at the lower end of the resin column, a pre-column valve at the upper end of the resin column, closing a right-column valve at the lower end of the resin column, closing a right-column valve at the upper end of the resin column, and allowing regenerant to enter the top of the resin column from the bottom of the resin column.

13. The continuous flow simulated moving bed sewage characteristic ion advanced treatment method according to claim 12, wherein the regeneration process is completed in a regeneration zone, and the regeneration zone adopts a elution mode of lower inlet and upper outlet.

14. The continuous flow simulated moving bed sewage characteristic ion advanced treatment method according to claim 13, wherein the regeneration temperature is controlled to be 20-60 ℃, and the elution flow rate is preferably in the range of 1-5 times of the filler volume/h.

15. The continuous flow simulated moving bed sewage characteristic ion advanced treatment method of claim 13, wherein the regenerant is an acid or alkali solution in the range of 5% -30%.

16. The continuous flow simulated moving bed sewage characteristic ion advanced treatment method of claim 13, wherein the regeneration time is controlled to be 30-60 min.

17. The continuous flow simulated moving bed sewage characteristic ion advanced treatment method according to claim 13, wherein after the regeneration is completed, the residual regenerant is ejected to the regenerant waste liquid tank (11) by tap water at a superficial flow rate of 1 to 10 times of the packing volume/h.