CN115259452A - Continuous flow simulated moving bed sewage characteristic ion advanced treatment device and method - Google Patents

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 the incoming water; the pH adjusting unit is arranged at the downstream of the pretreatment unit and is used for adjusting the sewage to the most suitable adsorption condition; the continuous flow simulated moving bed unit is arranged at the downstream of the pH adjusting unit, and is internally provided with an adsorption filler which is used for continuously adsorbing characteristic ions in the sewage and discharging standard water. The continuous flow simulated moving bed sewage characteristic ion deep treatment device can realize continuous flow uninterrupted operation, increase mass transfer power and ensure the efficiency of removing the wastewater 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

As economy develops rapidly in recent years in China, the problems of heavy metal exceeding and fluoride exceeding in sewage discharged by industrial enterprises often exist, and the sanitary standard of domestic drinking water in China is difficult to reach (GB 5749-2006). The conventional treatment method of the fluorine-containing wastewater mainly comprises a chemical precipitation method and a coagulating precipitation method, and the conventional treatment method is difficult to reach the requirement of less than 1.0 mg/L; the method for removing the heavy metal mainly comprises a chemical precipitation method and a membrane method, wherein the treatment degree of the chemical precipitation method is insufficient, the operation cost of the membrane 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 device, including: 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 the incoming water;

the pH adjusting unit is arranged at the downstream of the pretreatment unit and is used for adjusting the sewage to the most suitable 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 the selective adsorption filler is used for continuously adsorbing characteristic ions in the sewage and discharging the water reaching the standard.

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

the first stop valve water inlet communicates with the container sewage inlet, the first stop valve outlet communicates with the first sewage pump inlet, the first sewage pump outlet is connected with the first electromagnetic flowmeter inlet, and the first electromagnetic flowmeter outlet end is connected with the sand filter device inlet end to be used for filtering 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 adjusting tank is provided with a first mechanical stirring device, a first pH online monitoring device and a first dosing device;

the downstream of the first buffer pool is connected with a second sewage pump, the 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 which respectively form an adsorption zone, a regeneration zone and a standby zone.

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 range of the first screen is 5 meshes to 35 meshes, and the mesh range of the second screen is 5 meshes to 35 meshes.

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

Furthermore, 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 region, and a top region and a bottom region which are positioned at two ends of the middle region, wherein the filler of the top region and the filler of the bottom region are both 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 positioned 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 mm-3 mm.

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

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

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

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

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

Furthermore, a regenerant pump is connected to the downstream of the regenerant pool, the outlet end of the regenerant pump is communicated with the 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.

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

The regenerant waste liquid tank is arranged at the downstream of the continuous flow simulated moving bed unit and is used for receiving regenerant waste liquid discharged from the system.

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

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

preferably, the flow rate of the wastewater from the top of the resin column to the bottom of the resin column is preferentially carried out in the range of 1 to 10 times the volume of the packing per hour.

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

Furthermore, the regeneration process is completed in a regeneration zone, and the regeneration zone adopts an elution mode of bottom-in and top-out;

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

furthermore, the regenerant adopts an acid or alkali solution within the range of 5-30 percent;

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

further, after regeneration is finished, ejecting residual regenerant to a regenerant waste liquid pool by using tap water at an empty tower flow rate of 1-10 times of the volume of the filler/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 mobile operation is convenient.

(2) Can realize continuous flow uninterrupted operation, increase mass transfer power and ensure the removal efficiency of characteristic ions or metal cations in the wastewater.

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

(4) The method can ensure that the concentration of the characteristic ions in the sewage always meets the discharge requirement, and the removal of the characteristic ions or metal cations by adopting a continuous flow simulation moving bed method reduces a large amount of medicament adding cost and lowers the comprehensive treatment cost.

Drawings

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

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

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

FIG. 2 is a schematic structural diagram of a resin column in a continuous flow simulated moving bed sewage characteristic ion advanced treatment unit according to an embodiment of the disclosure;

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

fig. 4 is a schematic structural diagram of a screen in a continuous flow simulated moving bed sewage characteristic ion advanced treatment device according to an embodiment of the disclosure.

Reference numerals: 13. a container; 1. a pre-processing unit; 1-1, a first stop valve; 1-2, a first sewage pump; 1-3, a second stop valve; 1-4, a first electromagnetic flow meter; 1-5, a sand filtration device; 8. a pH adjusting unit; 8-1, a third stop valve; 8-2, a first regulating reservoir; 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 dosing device; 8-11, a second electromagnetic flow meter; 14. a continuous flow simulated moving bed unit; 2. a first resin column; 2-1, a first thermometer; 2-2, a first characteristic pollutant 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 pollutant 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 tenth four-way rear stop valve; 6-11 and a fifth communication pipeline; 7. a sixth resin column; 7-1, a sixth thermometer; 7-2, a sixth characteristic pollutant ion monitoring device; 7-3, an 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 which reaches 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 reservoir; 9-6, a second buffer pool; 9-7, a second connecting channel; 9-8 parts of 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, sixth quick connection; 10-11, a seventh stop valve; 10-12, a tap water pump; 11. a regenerant waste liquid pool; 11-1 and 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 ring 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 central circle; 2036. water passing holes; 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, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

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 is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Based on the fact that the economy of China is rapidly developed in recent years, the problems that heavy metals and fluorides exceed the standard often exist in sewage discharged by industrial enterprises, and the sanitary standard of domestic drinking water of China is difficult to reach (GB 5749-2006), the embodiment of the disclosure provides a continuous flow simulated moving bed sewage characteristic ion advanced treatment device and a sewage treatment method.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the continuous flow simulated moving bed sewage characteristic ion deep treatment apparatus provided by 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 a sewage inlet, and a filter material is arranged in the pretreatment unit 1 to intercept large-particle impurities in the 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 the most suitable 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 arranged in the continuous flow simulated moving bed unit 14, and the selective adsorption filler is used for continuously adsorbing characteristic ions in the sewage and discharging the water reaching the standard. The continuous flow simulated moving bed unit 14 can simultaneously realize the functions of adsorption and regeneration, and ensure the continuous operation of the system. The continuous flow simulated moving bed sewage characteristic ion advanced treatment device can realize continuous flow uninterrupted operation, increase mass transfer power and ensure the efficiency of removing the wastewater 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 unit further comprises a container 13, wherein the container 13 is provided with the pretreatment unit 1, the pH adjustment unit 8, the continuous flow simulated moving bed unit 14, an auxiliary unit 15, a PLC automatic control system 16, and the auxiliary unit 15 realizes the storage, even heat preservation and heat exchange functions of sewage, standard water, a regenerant and a regenerant waste liquid. The continuous flow simulated moving bed sewage characteristic ion deep treatment device provided by the disclosure has the advantages of small floor area, high integration level, high automation degree and convenience for mobile operation.

In some specific embodiments, the pre-treatment unit 1 comprises a first sewage pump 1-2, a first stop valve 1-1, a second stop valve 1-3, a first electromagnetic flow meter 1-4 and a sand filtration 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 flow meter 1-4 through the second stop valve 1-3, and the outlet end of the first electromagnetic flow meter 1-4 and the inlet end of the sand filter device 1-5 are connected with the sand filter device 1-5 for filtering out large-particle impurities. The sand filtration device 1-5 may be a sand filtration tank.

In some specific embodiments, the inlet end of the pH adjusting unit 8 is communicated with the outlet end of the sand filtration 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 adjusting 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 medicine adding device 8-10; the downstream of the first buffer tank 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 a 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 enters a first adjusting tank 8-2 after being preliminarily filtered by a pretreatment unit 1, a first medicine adding device 8-10 is arranged in the first adjusting tank 8-2, and acid liquor/alkali liquor is added into the first adjusting tank 8-2 by the first medicine adding device 8-10, so that the pH value of the sewage is adjusted to an appropriate value, preferably, the pH value is adjusted to 7-11 (including an end value). The first adjusting tank 8-2 contains a first mechanical stirring device 8-4 which can accelerate the uniform mixing of the acid liquor/alkali liquor and the sewage. The first adjusting tank 8-2 is also internally provided with a first pH on-line monitoring device 8-5 to match the dosing amount of the first dosing device 8-10 and monitor the pH value of the sewage in real time. The downstream of the first adjusting tank 8-2 is connected with a first buffer tank 8-3, and the sewage with the adjusted pH value enters the first buffer tank 8-3. Preferably, the first adjusting tank 8-2 is adjacent to the first buffer tank 8-3 and is separated by the first retaining wall 8-6, and the bottom end of the first retaining wall 8-6 comprises a first connecting channel 8-7 for allowing sewage to flow from the first adjusting tank 8-2 into the first buffer tank 8-3, so as to promote the stable water quality of the subsequent continuous flow simulated moving bed.

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 flow meter 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 backup zone, respectively.

As a preferred embodiment of the present invention, a continuous flow simulated moving bed unit 14 is connected downstream of the pH adjustment unit 8. Specifically, the outlet end of the second electromagnetic flowmeter 8-11 is communicated with a continuous flow simulated moving bed unit 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 made of heat preservation cotton. The downstream of the water inlet pipeline 12-1 is connected with a continuous flow simulation moving bed 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 adsorption zones. Sewage flows into the adsorption area through a water inlet pipeline 12-1, a front stop valve 2-5 of the first four-way valve is opened, a right stop valve 2-6 of the first four-way valve is closed, a right stop valve 2-7 of the second four-way valve is opened, and a rear stop valve 2-8 of the second four-way valve is closed. 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. Sewage enters a third resin column 4 through a second communication pipeline 3-11, a fifth four-way left stop valve 4-6 is opened, a fifth four-way front stop valve 4-5 and a fifth four-way right stop valve 4-7 are closed, a sixth four-way right stop valve 4-9 is opened, and a sixth four-way left stop valve 4-8 and a sixth four-way rear stop valve 4-10 are closed. Sewage enters a fourth resin column 5 through a third communication pipeline 4-11, a seventh four-way left stop valve 5-6 is opened, a seventh four-way front stop valve 5-5 and a seventh four-way right stop valve 5-7 are closed, an eighth four-way rear stop valve 5-10 is opened, an eighth four-way left stop valve 5-8 and an eighth four-way right stop valve 5-9 are closed; and the rear stop valve 5-10 of the eighth four-way 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 efficiency of characteristic ions of wastewater or metal cations is ensured, the effluent water is ensured to meet the discharge requirement all the time, the removal of the characteristic ions or the metal cations by adopting a continuous flow simulation moving bed method is reduced, a large amount of medicament 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 fourteenth 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. A third sampling port 3-3 is arranged on the top pipeline of the second resin column 3, and a fourth sampling port 3-4 is arranged on the bottom pipeline. A fifth sampling port 4-3 is arranged on the top pipeline of the third resin column 4, and a sixth sampling port 4-4 is arranged on the bottom pipeline. A seventh sampling port 5-3 is arranged on the top pipeline of the fourth resin column 5, and an eighth sampling port 5-4 is arranged on the bottom pipeline. A ninth sampling port 6-3 is arranged on the top pipeline of the fifth resin column 6, and a tenth sampling port 6-4 is arranged on the bottom pipeline. 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 during the adsorption process is preferably 1 to 10 times the volume of the filler/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. When the characteristic ions in the effluent of the fourth resin column 5 at the tail column of the adsorption area exceed the warning value, the first resin column 2 in the adsorption area is considered to reach adsorption saturation. At the moment, the first resin column 2 of the first column is withdrawn, specifically, the front stop valve 2-5 and the right stop valve 2-6 of the first four-way valve are closed, and the rear stop valve 2-8 and the right stop valve 2-7 of the second four-way valve are closed at the same time.

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 adsorption zone and the first resin column 2 are saturated, the second resin column 3 is used as the first adsorption zone column, and the third resin column 4, the fourth resin column 5 and the fifth resin column 6 are connected in series. At the moment, sewage flows into the adsorption area through a water inlet pipeline 12-1, a third four-way front stop valve 3-5 is opened, a third four-way left stop valve 3-6 and a third four-way right stop valve 3-7 are closed, a fourth four-way right stop valve 3-9 is opened, a fourth four-way rear stop valve 3-10 and a fourth four-way left stop valve 3-8 are closed; the sewage enters the third resin column 4 through the second communication pipes 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; sewage enters a fourth resin column 5 through a third communication pipeline 4-11, a seventh four-way left stop valve 5-6 is opened, a seventh four-way front stop valve 5-5 and a seventh four-way right stop valve 5-7 are closed, an eighth four-way right stop valve 5-9 is opened, and an eighth four-way left stop valve 5-8 and an eighth four-way rear stop valve 5-10 are closed; sewage enters a fifth resin column 6 through a fourth communication pipeline 5-11, a ninth four-way left stop valve 6-6 is opened, a ninth four-way front stop valve 6-5 and a ninth four-way right stop valve 6-7 are closed, a fourteenth rear stop valve 6-10 is opened, a fourteenth left stop valve 6-8 and a tenth four-way right stop valve 6-9 are 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. Thereby forming a second complete serial adsorption channel, realizing continuous flow uninterrupted operation, increasing mass transfer power and ensuring the removal efficiency of characteristic ions of the wastewater or metal cations; the continuous flow operation can reduce the loss rate of the selective adsorption filler and improve the utilization rate of the selective adsorption filler; the method can ensure that the effluent meets the discharge requirement all the time, and adopts a continuous flow simulation moving bed method to remove characteristic ions or metal cations, thereby reducing a large amount of medicament adding cost and lowering the comprehensive treatment cost.

In some specific embodiments, the eleventh four-way left cut-off valve 7-6 is opened, the eleventh four-way front cut-off valve 7-5 is closed, the twelfth four-way left cut-off valve 7-7 is closed, and the wastewater enters the sixth resin column 7 via the fifth communication pipe 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/h of the selective adsorption packing.

As a preferred embodiment of the present invention, when the second series adsorption channel starts adsorption, 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 a multi-temperature condition 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 to regenerate, 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, a regenerant waste liquid outlet pipeline 12-2 is communicated at the downstream of the first four-way front stop valve 2-5 in a bottom-to-top flowing mode, and after regeneration is completed, the regenerant waste liquid is discharged into the regenerant waste liquid pool 11. Furthermore, the regeneration temperature of the regeneration zone process is preferentially carried out within the range of 20-60 ℃, the regeneration flow rate is preferentially carried out within the range of 1-5 times of the filler volume/h, the regenerant is preferentially carried out by adopting acid or alkali solution within the range of 5-30%, optionally, the regenerant can be aluminum sulfate, and the regeneration time is preferentially carried out within 30-60 min.

An eighth stop valve 11-1 is arranged on the regenerant waste liquid outlet pipeline 12-2.

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, and the regenerant remained in the first resin column 2 is ejected to the regenerant waste liquid tank 11 at the empty tower flow rate of 1-10 times of the filler volume/h, so that the first resin column 2 completes the regeneration cycle and can be stored as a spare area resin column, and the next cycle regeneration operation can be carried out when the next adsorption area resin column is saturated in adsorption.

As a preferred embodiment of the present invention, the multi-resin columns include 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 identical in structure.

The first resin column 2 is taken as an example for detailed description. The upper end and the lower end of the resin column are connected in a flange mode, and a first upper flange 202 and a first lower flange 203 at the upper end of the resin column are butted and fixed with a 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 screws. And an interlayer gasket is arranged between the flange and the resin column. The spacer may be the first mesh screen 212 or the second mesh screen 213. The resin column is of a double-layer structure, selective adsorption fillers with different particle sizes and different materials are filled in the inner layer, optionally, the selective adsorption fillers can be a first filler 205, a third filler 207 or a second filler 211, the outer wall of the inner layer is wrapped with an electroplating heating film 206, and the temperature can be raised by heating after electrification, so that the temperature control operation within the range of 20-60 ℃ is realized, and meanwhile, the resin column is operated outdoors in cold weather, so that the effect deterioration caused by low temperature can be easily prevented. The resin column outer layer 204 is a vacuum jacket structure, and can protect the electroplating heating film 206 while playing a role in heat preservation. 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 reaches; the bottom is provided with a characteristic pollution ion monitoring device 2-2 which can display the concentration and the historical data of the real-time characteristic pollution ions on a PLC electric control cabinet.

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

Further, the first flange assembly comprises 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 have the same structure, and the first lower flange 203 and the second upper flange 210 have the same structure. Taking the first flange assembly as an example for explanation, the peripheral ring of the first lower flange 203 includes 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 fixation. The central circle 2035 is partially butted with the inner layer of the resin column, the central circle 2035 is of a porous structure and contains a plurality of water passing holes 2036, so that bias flow is prevented, uneven adsorption is realized, and high-efficiency adsorption efficiency is ensured.

In some embodiments, the resin column comprises an outer layer and an inner layer, the outer layer being disposed outside the inner layer; valves are arranged at the top and the bottom of the resin column, so that a vacuum jacket layer is formed 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 present invention, the continuous flow simulated moving bed unit comprises resin columns with identical structural features, 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, selective adsorption filler is filled in the inner layer, the outer wall of the inner layer is wrapped by the electroplating heating film 206, and the temperature can be heated after the resin column is electrified, so that the temperature control operation within the range of 20-60 ℃ is realized; the outer layer is of a vacuum jacket structure and can play a role in heat preservation; the top end and the bottom end of the resin column are 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 first packing 205, and an interlayer second screen 213 is present between the resin column bottom end inner layer second flange assembly and second packing 211. The mesh number of the first screen 212 is in the range of 5 to 35 meshes, and the mesh number of the second screen 213 is in the range of 5 to 35 meshes. Flanges at two ends of the resin column are in partial contact with the second filler 211 and the first filler 205 of the large-particle filler, and a screen with 5-35 meshes is arranged in the middle of the resin column to play a role of blocking so as to prevent the large-particle filler from leaking and blocking a pipeline. The mesh number of the first mesh 212 or the second mesh 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, the first screen 212 is illustrated in detail, and the first screen 212 is composed of a central circular screen 2122 and a first circular ring structure 2121. Specifically, the first circular structure 2121 is a circular double-layer structure, and the central circular screen 2122 is disposed between the first circular structure 2121 and the second circular structure 2121, and is bonded and pressed. The sealing ring formed by the first annular structure 2121 may be made of teflon or silica gel, preferably silica gel. The central circular screen 2122 is made of stainless steel.

In some embodiments, the first screen 212 includes a first annular ring structure 2121 and a central circular screen 2122 arranged in a stack. The screen is formed by pressing after stainless steel and sealable materials are bonded. Specifically, the outer layer is of a circular double-layer structure, the central circular screen is arranged in the middle layers of the upper and lower circular rings, and pressing is carried out after bonding. The double-layer sealing ring can be made of polytetrafluoroethylene materials and silica gel materials, and is preferably made of silica gel materials. The central circular screen is made of stainless steel. The contact surface of the joint of the resin column flange and the screen is a sieve plate-shaped structure with holes. The water inflow can be prevented from generating a bias flow condition, and higher efficiency is ensured.

In some specific embodiments, 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.

In some specific embodiments, the inner layer includes a middle region and a top region and a bottom region located at two ends of the middle region, the fillers in the top region and the bottom region are both large-particle alumina or metal cation adsorption resin, i.e., the first filler 205, and the particle size of the large-particle alumina or metal cation adsorption resin first filler 205 is 1mm to 6mm; the filler in the middle area is a third filler 206 which is small-particle fluorine-removing or metal-removing cationic resin, and the particle size of the third filler 206 is 0.3 mm-3 mm.

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

In some embodiments, a continuous flow simulated moving bed unit 14 is provided with an auxiliary unit 15 downstream; the auxiliary unit 15 comprises a standard water tank 9, a regenerant tank 10, a tap water tank 17 and a regenerant waste liquid tank 11; the standard water tank 9 is arranged at the downstream of the continuous flow simulated moving bed unit 14 and is used for receiving standard water discharged out of the system; a regenerant waste tank 11 is disposed downstream of the continuous flow simulated moving bed unit 14 for receiving regenerant waste from the discharge 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 baffle wall 9-8 is arranged between the second adjusting tank 9-5 and the second buffer tank 9-6, the second baffle 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 online pH monitoring device 9-3 and a second chemical adding 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 reservoir 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 stop valve 10-3 is communicated with the regenerant inlet line 12-4.

In some specific 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.

A regenerant waste tank 11 is disposed downstream of the continuous flow simulated moving bed unit 14 for receiving regenerant waste from the discharge system.

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

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

preferably, the flow rate of the wastewater from the top of the resin column to the bottom of the top of the resin column is preferentially in the range of 1 to 10 times the volume of the filler per hour.

In some embodiments, the regeneration process comprises opening the rear valve of the lower end column and the front valve of the upper end column of the resin column, closing the right valve of the lower end column of the resin column, closing the right valve of the upper end column of the resin column, and introducing the regenerant into the top of the resin column from the bottom of the resin column.

In some embodiments, the regeneration process is accomplished in a regeneration zone that employs a bottom-in-top-out elution mode; preferably, the regeneration temperature is controlled to be 20-60 ℃, and the elution flow rate is preferentially carried out within the range of 1-5 times of the volume of the filler per hour; preferably, the regenerant adopts 5 to 30 percent of acid or alkali solution; preferably, the regeneration time is controlled to be 30 min-60 min; preferably, after the regeneration is completed, the residual regenerant is ejected to the regenerant waste liquid tank 11 by using tap water at a superficial flow rate of 1-10 times of the volume of the filler/h.

Compared with the prior art device, the implementation case of the present disclosure has 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 the advantages of small floor area, high integration level, high automation degree and convenient mobile operation.

(2) The continuous flow simulated moving bed device can realize continuous flow uninterrupted operation, increase mass transfer power and ensure the removal efficiency of fluorine ions or metal cations in wastewater.

(3) The invention adopts a simulated moving bed operation mode to 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 continuous flow simulation moving bed method is adopted to remove the characteristic ions or metal cations, thereby reducing the adding cost of a large amount of medicaments and lowering the comprehensive treatment cost.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be 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. Also, 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 phrases "comprising a component of' 8230; \8230;" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present 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 (10)

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

the pretreatment unit (1) is communicated with a sewage inlet, and a filter material is arranged in the pretreatment unit (1) to intercept large-particle impurities in the 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 the sewage to the optimum 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 the sewage and discharging the water reaching the standard.

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

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

3. The continuous-flow simulated moving bed wastewater characteristic ion deep treatment device according to claim 1, wherein 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 adjusting 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 medicine adding device (8-10);

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

4. The continuous-flow simulated moving bed wastewater characteristic ion deep treatment apparatus according to claim 1, wherein the continuous-flow simulated moving bed unit (14) comprises a plurality of resin columns forming an adsorption zone, a regeneration zone and a standby zone, respectively;

further, the 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 filler, and the outer wall of the inner layer is provided with an electroplating heating film (206);

further, a first screen (212) is arranged at the top of the inner layer, a second screen (213) is arranged at the bottom of the inner layer, the mesh range of the first screen is 5-35 meshes, and the mesh range of the second screen is 5-35 meshes;

further, the first screen (212) or the second screen (213) includes a first annular ring structure (2121) and a central circular screen (2122) arranged in a stack.

5. The continuous flow simulated moving bed sewage characteristic ion deep treatment device according to claim 4, wherein 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;

or 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 both the first filler (205) of the top area and the second filler (211) of 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 third filler (207) positioned 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 mm-3 mm.

6. Continuous flow simulated moving bed wastewater characteristic ion advanced treatment unit according to any of the claims 1 to 5, 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 water tank (9), a regenerant tank (10), a tap water tank (17) and a regenerant waste liquid tank (11);

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

the regenerant waste reservoir (11) is disposed downstream of the continuous flow simulated moving bed unit (14) for receiving regenerant waste from the discharge system.

7. The continuous-flow simulated moving bed wastewater characteristic ion deep treatment device according to claim 6, wherein the standard reaching water tank (9) comprises a second regulating tank (9-5) and a second buffer tank (9-6), a second baffle wall (9-8) is arranged between the second regulating tank (9-5) and the second buffer tank (9-6), the second baffle wall (9-8) is provided with a second connecting channel (9-7), the second regulating 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 medicine adding device (9-4);

or a regenerant pump (10-1) is connected to the downstream of the regenerant pool (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) is connected with the lower end of the resin column;

or the outlet end of the tap water tank (17) is communicated with the inlet end of a tap water pump (10-12), the 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;

the regenerant waste reservoir (11) is disposed downstream of the continuous flow simulated moving bed unit (14) for receiving regenerant waste from the discharge system.

8. A continuous flow simulated moving bed sewage characteristic ion advanced treatment method is characterized by comprising the following steps:

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 the resin column, closing the right valve of the upper end column of the resin column, and closing a rear valve of the lower end column of the resin column, so that the 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;

furthermore, the flow speed of the wastewater flowing from the top of the resin column to the bottom of the resin column is preferentially carried out within the range of 1-10 times of the volume of the filler per hour.

9. The method for the characteristic ion advanced treatment of sewage by the continuous flow simulated moving bed according to claim 8, wherein the regeneration process comprises opening the rear valve of the lower end column and the front valve of the upper end column of the resin column, closing the right valve of the lower end column of the resin column, closing the right valve of the upper end column of the resin column, and introducing the regenerant into the top of the resin column from the bottom of the resin column.

10. The method for the characteristic ion deep treatment of sewage by the continuous flow simulated moving bed according to claim 9, wherein the regeneration process is completed in a regeneration zone, and the regeneration zone adopts a lower-in and upper-out elution mode;

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

furthermore, the regenerant adopts an acid or alkali solution within the range of 5-30 percent;

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

further, after the regeneration is finished, the residual regenerant is ejected out to a regenerant waste liquid pool (11) by tap water at the empty tower flow rate of 1-10 times of the volume of the filler per hour.

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