Multilayered packed resin adsorption filter and its application

Abstract

The application discloses a multi-layer grouping resin adsorption filter tank and application thereof, and belongs to the technical field of wastewater treatment. The application creatively proposes simultaneous water feeding from the top and the bottom of the resin adsorption filter tank, utilizes the upper and lower layering and left and right compartmentalization, realizes in-situ series and parallel switching of the resin adsorption system, greatly improves the comprehensive working adsorption volume of the resin, prolongs the adsorption period, strengthens in-situ mixing of the effluent, and through online monitoring of target pollutants, flexibly adjusts and controls the water feeding flow from the top and the bottom, so that the mixed effluent in the middle of the filter tank meets the treatment requirements of higher efficiency, more durability and more stable water quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wastewater treatment, and more particularly relates to a multi-layer grouping type resin adsorption filter tank and application thereof. BACKGROUND

[0002] It is a key to promote clean production and green high-quality development of manufacturing industry to realize efficient and deep purification of wastewater.

[0003] At present, resin adsorption technology is an important water pollutant control and treatment technology, which usually realizes the removal of target pollutants in water body based on electrostatic attraction or complex pairing mechanism. However, the existing resin adsorption technology is often limited by the mass transfer efficiency of the bed and the adsorption saturation period, and lacks suitable equipment and control methods for real complex working conditions, and its performance often cannot meet the actual application requirements. The main problems existing in the existing large water quantity wastewater treatment device are low treatment efficiency, insufficient treatment depth, and high treatment cost, which are as follows:

[0004] (1) Low treatment efficiency: The adsorption fixed bed technology generally has a clear limitation on the flow velocity of wastewater. Too fast adsorption flow velocity will lead to insufficient contact time of adsorption filter material and pollutants, and the pollutants cannot be fully intercepted and adsorbed. Therefore, in order to improve the adsorption precision, it is often necessary to reduce the adsorption flow velocity, thereby losing part of the treatment capacity and causing low treatment efficiency.

[0005] (2) Insufficient treatment depth: For the adsorption fluidized bed or adsorption expanded bed type reactor, although the flow velocity of wastewater can be greatly improved to improve the treatment capacity, it also faces the challenges of insufficient and unstable adsorption, thereby making it difficult to guarantee the treatment depth.

[0006] (3) High treatment cost: The operation cost of resin adsorption process is mainly determined by the adsorption period, desorption frequency, consumption of chemicals and power and the like. The adsorption characteristics determine that the content of target pollutants in the adsorption effluent is unevenly distributed in time and space. The pollutant concentration of the effluent in the early adsorption stage is extremely low (much lower than the emission requirement), and the pollutant concentration of the effluent close to breakthrough rapidly rises, which greatly limits the adsorption operation period and increases the desorption frequency. On the one hand, the wastewater is excessively disposed, causing waste of treatment resources; on the other hand, frequent desorption generates a large amount of chemical and power consumption, resulting in high treatment cost.

[0007] For example, in order to solve the problem of wastewater treatment efficiency and treatment depth, the Chinese patent application for invention with application number 202110947130.6 and filing date August 18, 2021 discloses a U-shaped adsorption filter for deep defluorination of fluorine-containing mine water and its application. Based on the development of modified metal-loaded filter material, water distribution walls are arranged on the inlet and outlet sides of the adsorption filter, and a high-low drop is provided. The upper part of the water distribution wall is provided with a water seepage hole, and a U-shaped groove body is arranged between the water distribution walls. The U-shaped groove body is arranged on the adsorption filter through a plurality of supporting columns. The water distribution wall on the inlet side and the U-shaped groove body, the bottom of the U-shaped groove body and the supporting column, and the U-shaped groove body and the water distribution wall on the outlet side are all filled with manganese-titanium modified zeolite filter material. Through the U-shaped drop design, the energy consumption is reduced, the land occupation is small, and the shortcomings of large land occupation and high operating energy consumption of the conventional filter are overcome.

[0008] However, the above patent application mainly improves the adsorption precision by developing adsorption filter material and reduces power consumption through U-shaped drop, but does not optimize the adsorption process itself. The problem of uneven distribution of adsorption material penetration characteristics, adsorption effluent fluoride time and space is not considered. Moreover, the filter material is disposable, and the entire filter material needs to be replaced when the filter effluent exceeds the standard, which cannot realize in-situ regeneration and recycling.

[0009] In addition, the Chinese utility model patent application with application number 201120324819.5 and filing date August 25, 2011 discloses a group type resin adsorption unit, which includes a plurality of adsorption separation columns. Every two adsorption separation columns belong to one adsorption device combination. Each adsorption device combination further includes a storage tank and an upward conveying pipe. The upward conveying pipe is provided with a pump. The upper end of the upward conveying pipe is connected to the lower end of the storage tank through a pipeline system, and the lower end of the storage tank is connected to a feed branch pipe through the pipeline system. The feed branch pipe is connected to a feed main pipe. The storage tank and the upper end of the resin adsorption separation column are respectively connected through conduits. The connection and valve control between the groups of adsorption device combinations realize the series and parallel connection between the groups of adsorption devices. However, in order to realize this function, a plurality of resin columns need to be additionally used. The operation mode of the plurality of resin columns is complicated, the water head pressure loss is serious, which leads to insufficient treatment capacity, increased investment cost, inconvenient operation regulation due to different adsorption periods of different adsorption columns, and other problems. Moreover, the adsorption effluent needs to be stored and then mixed in a different place, which still faces the challenge of uneven distribution of pollutants in time and space in the adsorption effluent.

[0010] In order to solve the above series of problems of resin adsorption treatment technology, it is urgent to develop a resin adsorption filter with high adsorption performance, high treatment efficiency, low operation cost, and in-situ regeneration, and a control method thereof. SUMMARY

[0011] 1. Problems to be solved

[0012] In view of the problems of low treatment efficiency, uneven time / space distribution of effluent water quality, large water head pressure loss and high treatment cost of the existing resin adsorption technology, the application provides a multi-layer grouping resin adsorption filter tank and application thereof. Through the creative proposal of simultaneous water inlet at the top and bottom of the resin adsorption filter tank and in-situ mixing of the water outlet at the middle, and through the control of the water inlet flow ratio of the upper fixed bed and the lower expanded bed, the concentration distribution of the target pollutants in the space and time of the comprehensive adsorption effluent is regulated, the treatment depth of the filter tank is ensured, the adsorption efficiency of the bed resin material is fully utilized, and the operation cycle is prolonged. In addition, by using the grid design, in-situ series and parallel switching is realized, the treatment capacity of the adsorption filter tank is greatly improved, the consumption of desorption agents and other chemicals is saved, and the operation cost is saved.

[0013] 2. Technical solution

[0014] In order to solve the above problems, the technical scheme adopted by the application is as follows:

[0015] On the one hand, the application provides a multi-layer grouping resin adsorption filter tank, which comprises a filter tank body, the inside of the filter tank body is divided into a first reaction unit and a second reaction unit by a partition plate, a first fixed bed reaction zone and a first expanded bed reaction zone are arranged in the first reaction unit from top to bottom, a first channel is arranged between the first fixed bed reaction zone and the first expanded bed reaction zone, and the effluent of the first fixed bed reaction zone and the first expanded bed reaction zone is mixed in-situ in the first channel.

[0016] A second fixed bed reaction zone and a second expanded bed reaction zone are arranged in the second reaction unit from top to bottom, a second channel is arranged between the second fixed bed reaction zone and the second expanded bed reaction zone, the effluent of the second fixed bed reaction zone and the second expanded bed reaction zone is mixed in-situ in the second channel, and a water outlet is arranged on the first channel and the second channel.

[0017] Preferably, the first reaction unit and the second reaction unit are provided with water distribution devices at the top.

[0018] Preferably, the first reaction unit is provided with a first water distributor at the top and a third water distributor at the bottom; the second reaction unit is provided with a second water distributor at the top and a fourth water distributor at the bottom, and a flow guide plate and an overflow weir are arranged in the first channel and the second channel to realize in-situ mixing of the effluent of the fixed bed reaction zone and the expanded bed reaction zone and control the stability of the effluent flow rate, wherein the ratio of the width D1 of the overflow weir to the bottom closing span D2 of the flow guide plate is between 1.0 and 7.0.

[0019] Preferably, the height ratio between the first expanded bed reaction zone and the first fixed bed reaction zone is 1.2-1.5, and the height ratio between the second expanded bed reaction zone and the second fixed bed reaction zone is 1.2-1.5.

[0020] More preferably, the height of the first channel is not less than 10 cm, and / or the height of the second channel is not less than 10 cm.

[0021] Preferably, the bottom of the first expanded bed reaction zone is provided with a water-permeable brick layer, and a first cavity is formed between the water-permeable brick layer at the bottom of the first expanded bed reaction zone and the bottom of the first reaction unit, and the third water distributor is arranged inside the first cavity.

[0022] The bottom of the second expanded bed reaction zone is provided with a water-permeable brick layer, and a second cavity is formed between the water-permeable brick layer at the bottom of the second expanded bed reaction zone and the bottom of the second reaction unit, and the fourth water distributor is arranged inside the second cavity.

[0023] More preferably, the bottom of the first fixed bed reaction zone and the bottom of the second fixed bed reaction zone are both provided with a water-permeable brick layer.

[0024] Preferably, the first water distributor is connected to the water inlet tank through a first water distribution pipeline, and a first water distribution valve is arranged on the first water distribution pipeline; the second water distributor is connected to the water inlet tank through a second water distribution pipeline, and a second water distribution valve is arranged on the second water distribution pipeline.

[0025] The third water distributor is connected to the water inlet tank through a third water distribution pipeline, and a third water distribution valve is arranged on the third water distribution pipeline; the fourth water distributor is connected to the water inlet tank through a fourth water distribution pipeline, and a fourth water distribution valve is arranged on the fourth water distribution pipeline.

[0026] Preferably, the first water distribution pipeline and the second water distribution pipeline are connected to the water inlet tank through an upper water inlet pipeline, and a first water inlet valve is arranged on the upper water inlet pipeline.

[0027] The third water distribution pipeline and the fourth water distribution pipeline are connected to the water inlet tank through a lower water inlet pipeline, and a second water inlet valve is arranged on the lower water inlet pipeline.

[0028] Preferably, a monitoring instrument is arranged at the water outlet of the first channel and the second channel for monitoring the concentration of target pollutants in the water.

[0029] Preferably, the target pollutants include but are not limited to fluoride ions.

[0030] Preferably, the filter tank is further provided with a desorption agent storage tank and a regenerant storage tank, the desorption agent storage tank is connected to the first water distributor and the second water distributor through a pipeline via a desorption pump, the regenerant storage tank is connected to the first water distributor and the second water distributor through a pipeline via a regeneration pump, and an acid liquid temporary storage tank is arranged on the pipeline connecting the desorption agent storage tank to the first water distributor and the second water distributor, for storing and supplementing the circulating acid liquid consumed in the mixed resin regeneration process.

[0031] In another aspect, the present application provides the use of the multi-layered grouping resin adsorption filter tank in the treatment of pollutants. The method of use comprises: feeding water into the filter tank from the top and bottom of the filter tank through the water distribution devices provided at the top and bottom of the first reaction unit and the second reaction unit, respectively, at flow rates of Q 上 and Q 下 respectively, so that the adsorption material filled in the first reaction unit forms a first fixed bed reaction zone and a first expanded bed reaction zone, the adsorption material filled in the second reaction unit forms a second fixed bed reaction zone and a second expanded bed reaction zone, and the effluent of the first fixed bed reaction zone and the first expanded bed reaction zone is mixed in situ in the first channel before being discharged, and the effluent of the second fixed bed reaction zone and the second expanded bed reaction zone is mixed in situ in the second channel before being discharged.

[0032] Preferably, the use of the multi-layered grouping resin adsorption filter tank of the present application is for the treatment of fluorine-containing wastewater. The method of use comprises the following steps:

[0033] (1) adjusting the pH value of the fluorine-containing wastewater to 2-5 using hydrochloric acid;

[0034] (2) pumping the fluorine-containing wastewater adjusted in step (1) into the filter tank from the lower part and the upper part of the filter tank at flow rates of Q 下 and Q 上 respectively; wherein the flow rate of the lower water Q 下 is 15-35 BV / h, the flow rate of the upper water Q 上 is 5-15 BV / h, and the flow rate ratio of the lower water to the upper water is R, R = Q 下 / Q 上 ;

[0035] (3) adjusting the flow rate ratio of the lower water to the upper water according to the following formula to improve the treatment capacity of the filter tank, while ensuring that the total water inflow of the filter tank remains unchanged and the mixed concentration of fluorine in the effluent of the filter tank C mix changes,

[0036] when 0 < C mix ≤ 0.5 mg / L,

[0037] when 0.5 < C mix ≤ 0.8 mg / L,

[0038] when 0.8 < C mix ≤ 1.0 mg / L,

[0039] when C mix ≥ 1.0 mg / L, the upper and lower water feeding of the filter tank should be stopped immediately;

[0040] wherein C mixC is the on-line monitoring value of fluoride concentration in the middle passage of the filter, unit: mg / L; ΔC mix is the change value of fluoride concentration in the monitoring period, unit: mg / L; Q 下 and Q 上 are the lower / upper influent flow rates of the filter, unit: BV / h; R' is the adjusted ratio of the lower / upper influent flow rates.

[0041] More preferably, the turbidity requirement of the upper influent is SDI < 5, and the turbidity requirement of the lower influent is SDI < 30.

[0042] More preferably, the on-line monitoring value of fluoride concentration of the mixed effluent in the first passage and the second passage C mix is greater than the discharge limit value 1.0 mg / L, the adsorption is stopped, and the filter desorption regeneration treatment is performed.

[0043] Preferably, when the filter performs the adsorption operation, the first reaction unit and the second reaction unit inside the filter adopt parallel or series adsorption forms, and can be switched between parallel / series; when the filter performs the desorption operation, the first reaction unit and the second reaction unit inside the filter adopt series desorption form.

[0044] Preferably, the desorption is a water washing-desorption process, and the specific operation is as follows:

[0045] (1) Water washing: close the effluent valves of the first passage and the second passage, open the filter bottom emptying valve, inject water from the first water distributor and the second water distributor into the first reaction unit and the second reaction unit of the filter respectively, perform soaking flushing, and the effluent is discharged into the effluent pool through the emptying valve, and the water washing is stopped after 1-2 bed volumes of water washing;

[0046] (2) Desorption: close the second influent valve, open the first influent valve, inject the desorption agent from the desorption agent tank through the metering pump into the first reaction unit of the single-sided pool body through the first water distributor, close the third water valve and the fourth water valve, close the first water valve, so that the resin in the first reaction unit is immersed in the desorption agent, after complete immersion and desorption, open the third water valve and the fourth water valve, inject the desorption liquid into the second water distributor into the second reaction unit of the other side pool body through the circulating pump, so that the resin in the second reaction unit is immersed in the desorption agent, and after complete desorption, open the emptying valve to empty the desorption agent.

[0047] More preferably, after the above desorption operation, a certain amount of desorption agent is used to repeat the above desorption steps until the desorption rate of all the adsorption resins in the filter is > 98%, and the desorption agent is discharged into the low-concentration desorption agent recovery pool for recycling as the desorption agent of the next batch.

[0048] More preferably, the regeneration operation of the filter tank specifically comprises: storing the regenerant in a storage tank, injecting the regenerant into the filter tank body by the first water distributor and the second water distributor, discharging from the bottom of the filter tank, and returning to the regeneration liquid temporary storage tank by the circulating pump; the process monitors the circulating acid liquid pH value in real time, starts the regeneration pump and appropriately supplements the regenerant, and maintains the pH value of the circulating liquid in the regeneration process at about 2-3.

[0049] 3. Beneficial effects

[0050] Compared with the prior art, the beneficial effects of the present application are:

[0051] (1) The multi-layer grouping resin adsorption filter tank of the present application is creatively designed as a fixed bed and an expanded bed coupled adsorption filter tank, which improves the adsorption rate and treatment capacity compared with a single fixed bed / expanded bed, and solves the problem of uneven time and space distribution of target pollutants in the effluent of the adsorption filter tank through the mode of simultaneous water inlet at the top and bottom and in-situ mixing of water outlet at the middle;

[0052] (2) The multi-layer grouping resin adsorption filter tank of the present application can realize in-situ switching of the adsorption units in series / parallel through the grouping design, and can flexibly adjust the water inlet flow ratio of the upper fixed bed and the lower expanded bed by monitoring the target pollutant concentration of the in-situ mixed effluent, thereby ensuring the adsorption accuracy (treatment depth) of the filter tank on the one hand, and greatly prolonging the adsorption cycle of the filter tank, reducing the desorption batches, and saving the operation cost on the other hand;

[0053] (3) The application of the multi-layer grouping resin adsorption filter tank in the treatment of target pollutants adopts an adsorption filter tank with upper and lower layers and left and right groups for advanced treatment, realizes in-situ desorption and regeneration of the adsorption filter material, solves the problems of huge consumption of desorption agent and high desorption cost during the desorption process of the filter tank compared with the traditional single filter tank, and realizes the recycling of the desorption liquid by series desorption, thereby improving the concentration multiple of the desorption liquid, greatly reducing the amount of desorption agent, and further reducing the amount of regenerant and water washing, and achieving cost reduction and efficiency increase. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 Figure 1 is a structural schematic diagram of a multi-layer grouping resin adsorption filter tank of the present application;

[0055] Figure 2 Figure 5 is a schematic diagram of the relationship between the influent / effluent fluorine concentration (mg / L) and the resin adsorption volume (BV) under the single fixed bed, single expanded bed and mixed bed layer adsorption mode of Example 2 of the present application;

[0056] Figure 3 Figure 6 is a schematic diagram of the relationship between the desorption liquid fluorine concentration (mg / L) and the alkalinity (%) and the desorption liquid volume (BV);

[0057] In the figure:

[0058] 100, filter tank body; 110, first reaction unit; 110A, first fixed bed reaction zone;

[0059] 110B, first expanded bed reaction zone; 110C, first passage; 110D, first cavity;

[0060] 120, second reaction unit; 120A, second fixed bed reaction zone; 120B, second expanded bed reaction zone;

[0061] 120C, second passage; 120D, second cavity; 1101, first water distributor; 1102, third water distributor;

[0062] 1201, second water distributor; 1202, fourth water distributor; 1310, permeable brick layer; 1410, first water distribution pipeline;

[0063] 1420, second water distribution pipeline; 1510, third water distribution pipeline; 1520, fourth water distribution pipeline;

[0064] 200, water inlet tank; 201, first water inlet valve; 202, second water inlet valve;

[0065] 203, third water inlet valve; 204, fourth water inlet valve; 210, upper water inlet pipeline;

[0066] 220, lower water inlet pipeline; 300a, first water outlet tank; 300b, second water outlet tank;

[0067] 301, first water inlet valve; 302, second water inlet valve; 400, desorption agent storage tank;

[0068] 401, emptying valve; 500, regeneration agent storage tank; 600, high-concentration desorption liquid temporary storage tank;

[0069] 700, low-concentration desorption agent recovery tank; 800, acid liquid temporary storage tank; 801, acid circulating pump;

[0070] 900, air compressor. DETAILED DESCRIPTION

[0071] The application will be further described below in combination with specific embodiments.

[0072] As Figure 1As shown, the present application provides a multi-layered packed resin adsorption filter tank, which comprises a filter tank body 100, the inside of which is divided into a first reaction unit 110 and a second reaction unit 120 by a partition plate (for example, a glass plate), the top of the first reaction unit 110 is provided with a first water distributor 1101, the top of the second reaction unit 120 is provided with a second water distributor 1201, the first water distributor 1101 is connected with a water inlet tank 200 through a first water distribution pipeline 1410, a first water distribution valve 201 is arranged on the first water distribution pipeline 1410, the second water distributor 1201 is connected with the water inlet tank 200 through a second water distribution pipeline 1420, a second water distribution valve 202 is arranged on the second water distribution pipeline 1420, and the first water distribution pipeline 1410 and the second water distribution pipeline 1420 are connected with the water inlet tank 200 through an upper water inlet pipeline 210, on which a first water inlet valve 301 is arranged.

[0073] A first fixed bed reaction zone 110A and a first expanded bed reaction zone 110B are arranged in the first reaction unit 110 from top to bottom, the height ratio between the first expanded bed reaction zone 110B and the first fixed bed reaction zone 110A is 1.2-1.5, the bottom of the first fixed bed reaction zone 110A and the first expanded bed reaction zone 110B is provided with a water permeable brick layer 1310, the water permeable brick layer 1310 is provided with an adsorption filler layer, the water permeable brick layer at the bottom of the first expanded bed reaction zone 110B and the bottom of the first reaction unit 110 form a first cavity 110D, a third water distributor 1102 is arranged in the first cavity 110D, the third water distributor 1102 is connected with the water inlet tank 200 through a third water distribution pipeline 1510, a third water distribution valve 203 is arranged on the third water distribution pipeline 1510, and a first channel 110C is arranged between the first fixed bed reaction zone 110A and the first expanded bed reaction zone 110B, and the effluent of the first fixed bed reaction zone 110A and the first expanded bed reaction zone 110B is mixed in situ in the first channel 110C;

[0074] The second reaction unit 120 is provided with a second fixed bed reaction zone 120A and a second expanded bed reaction zone 120B from top to bottom, the height ratio between the second expanded bed reaction zone 120B and the second fixed bed reaction zone 120A is 1.2-1.5, the bottom of the second fixed bed reaction zone 120A and the bottom of the second expanded bed reaction zone 120B are both provided with a water permeable brick layer 1310, the water permeable brick layer 1310 is provided with an adsorption filler layer, the water permeable brick layer at the bottom of the second expanded bed reaction zone 120B and the bottom of the second reaction unit 120 form a second cavity 120D, the second cavity 120D is provided with a fourth water distributor 1202, the fourth water distributor 1202 is connected with the water inlet pool 200 through a fourth water distribution pipeline 1520, a fourth water valve 204 is arranged on the fourth water distribution pipeline 1520, and the third water distribution pipeline 1510 and the fourth water distribution pipeline 1520 are connected with the water inlet pool 200 through a lower water inlet pipe 220, a second water inlet valve 302 is arranged on the lower water inlet pipe 220, a second channel 120C is arranged between the second fixed bed reaction zone 120A and the second expanded bed reaction zone 120B, and the effluent of the second fixed bed reaction zone 120A and the second expanded bed reaction zone 120B is mixed in situ in the second channel 120C;

[0075] It should be noted that the first channel 110C and the second channel 120C are both provided with a flow guide plate and an overflow weir to realize the in-situ mixing of the effluent of the fixed bed reaction zone and the expanded bed reaction zone and control the stability of the effluent flow rate, wherein the ratio of the width D1 of the overflow weir to the bottom of the flow guide plate to the closing span D2 is between 1.0 and 7.0. And the first channel 110C and the second channel 120C are respectively provided with an effluent outlet for discharging the adsorbed effluent to the first water pool 300a and the first water pool 300b, and a monitoring instrument is arranged at the effluent outlet of the first channel 110C and the second channel 120C for monitoring the concentration of the target pollutant in the effluent, such as the concentration of fluoride ions, and the effluent mixed in situ by the first channel 110C and the second channel 120C is discharged after reaching the discharge standard.

[0076] The filter tank of the present application adopts the water inlet mode of the top and bottom water distribution devices, and the water inlet flow is controlled by the first water inlet valve 301 and the second water inlet valve 302 respectively. The first channel 110C and the second channel 120C in the middle of the adsorption filter tank are used as the middle water outlet channels of the present adsorption filter tank, the channels are hollow inside and communicate with the upper and lower tank bodies of the filter tank (i.e. the first fixed bed reaction zone 110A-the first expanded bed reaction zone 110B-the first channel 110C are communicated, and the second fixed bed reaction zone 120A-the second expanded bed reaction zone 120B-the second channel 120C are communicated), the water outlets at both ends of the channels are respectively provided with first water outlet control valves and second water outlet control valves, and the first channel 110C and the second channel 120C are provided with overflow weirs inside, and the adsorption water outlet passes through the overflow weirs into the water outlet pipes and then flows into the corresponding water outlet tanks. The upper and lower layered and left and right compartmented structure cavities of the filter tank are filled with functional resins with a particle size of 0.5-0.8 m and a swelling rate of 0.1-0.5, including but not limited to NDA-F nano adsorption resin, metal chelate resin and metal modified ion exchange resin. The width to height ratio of the filter tank body is 0.8-1.2.

[0077] The bottoms of the first water outlet tank 300a and the second water outlet tank 300b are communicated with the bottom of the filter tank through the backwashing pipe and the backwashing pump. The filter tank is further provided with a desorption agent storage tank 400 and a regeneration agent storage tank 500, the desorption agent storage tank 400 is communicated with the first water distributor 1101 and the second water distributor 1201 through the pipe via the desorption pump, the regeneration agent storage tank 500 is communicated with the first water distributor 1101 and the second water distributor 1201 through the pipe via the regeneration pump, and an acid liquid temporary storage tank 800 is arranged on the pipe communicating the desorption agent storage tank 400 with the first water distributor 1101 and the second water distributor 1201, for storing and supplementing the circulating acid liquid consumed in the mixed resin regeneration process.

[0078] The adsorption filter tank is provided with an air compressor 900 to ensure that there is no residual of the chemicals for desorption and regeneration in the adsorption filter tank.

[0079] The water outlet end of the backwashing pump is connected with the water distribution pipe arranged in parallel at the bottom of the adsorption filter tank, and an electromagnetic valve is arranged between the backwashing pump and the water outlet tank. The volume ratio of the water inlet tank 200 to the filter tank body 100 is 1 / 2-1 / 3, and the volume ratio of the first water outlet tank 300a or the second water outlet tank 300b to the filter tank body 100 is 1 / 4-1 / 3.

[0080] The application of the multi-layer grouping type resin adsorption filter tank of the present application in the treatment of pollutants, through the water distribution devices arranged at the top and bottom of the first reaction unit 110 and the second reaction unit 120, respectively with flow rates Q 上 and Q 下Meanwhile, the upflow and downflow are conducted to the filter tank, so that the adsorption material filled in the first reaction unit 110 forms the first fixed bed reaction zone 110A and the first expanded bed reaction zone 110B, the adsorption material filled in the second reaction unit 120 forms the second fixed bed reaction zone 120A and the second expanded bed reaction zone 120B, and the effluent of the first fixed bed reaction zone 110A and the first expanded bed reaction zone 110B is discharged after in-situ mixing in the first channel 110C, and the effluent of the second fixed bed reaction zone 120A and the second expanded bed reaction zone 120B is discharged after in-situ mixing in the second channel 120C.

[0081] Taking the fluorine-containing wastewater treatment as an example, the specific application operation is as follows:

[0082] Adsorption stage:

[0083] The fluorine-containing wastewater is introduced into the influent tank 200, the pH value of the fluorine-containing wastewater is adjusted to 2-5 by using hydrochloric acid acidification, the acidified fluorine-containing wastewater is introduced into the first water distributor 1101 and the second water distributor 1201 through the upflow pipe 210 by the influent pump, the influent of the upflow pipe 210 is controlled by the first influent valve 301, the water distribution flow rates of the first water distributor 1101 and the second water distributor 1201 are controlled by the first water distribution valve 201 and the second water distribution valve 202 respectively, the upflow is at a flow rate Q 上 The water distributor (for example, the first water distributor 1101 and the second water distributor 1201) at the top of the adsorption filter tank body 100 is introduced into the first reaction unit 110 and the second reaction unit 120 by uniform spraying, the adsorption material filled in the first reaction unit 110 forms the first fixed bed reaction zone 110A at the upper part, the adsorption material filled in the second reaction unit 120 forms the second fixed bed reaction zone 120A at the upper part, the fluorine ions in the upflow wastewater are adsorbed and intercepted by the resin in the adsorption filler layer, and the adsorbed effluent of the first fixed bed reaction zone 110A and the second fixed bed reaction zone 120A is introduced into the first channel 110C and the second channel 120C through the water-permeable brick layer 1310;

[0084] Similarly, the acidified fluorine-containing wastewater is introduced into the third water distributor 1102 and the fourth water distributor 1202 through the downflow pipe 220 by the influent pump, the influent of the downflow pipe 220 is controlled by the second influent valve 302, the water distribution flow rates of the third water distributor 1102 and the fourth water distributor 1202 are controlled by the third water distribution valve 203 and the fourth water distribution valve 204 respectively, the downflow is at a flow rate Q 下The water is transported to the distributors (e.g., the third distributor 1102 and the fourth distributor 1202) at the bottom of the adsorption filter body 100, and quickly fills the first cavity 110D and the second cavity 120D. Passing through the permeable brick layer, the adsorbent material filled in the first reaction unit 110 forms a first expanded bed reaction zone 110B from bottom to top, and the adsorbent material filled in the second reaction unit 120 forms a second expanded bed reaction zone 120B from bottom to top. Fluoride ions in the influent wastewater are adsorbed and retained by the resin. The adsorbed water from the expanded bed reaction zone 110B and the second expanded bed reaction zone 120B enters the first channel 110C and the second channel 120C through the overflow weir. The adsorbed water from the fixed bed reaction zone and the expanded bed reaction zone are mixed in situ in the first channel 110C and the second channel 120C. The concentration of fluoride ions in the water is monitored by the monitoring instruments installed at the outlets of the first channel 110C and the second channel 120C. After meeting the standards, the water is transported to the first effluent tank 300a and the second effluent tank 300b through pipelines.

[0085] It should be noted that bottom inlet differs from top inlet; bottom inlet has a higher flow rate, causing the resin in the adsorption packing layer to expand upwards in an expanded bed configuration (expansion ratio of approximately 20%–50%). This not only simultaneously improves treatment speed and mass transfer efficiency but also alleviates suspended solids clogging. Furthermore, once the flow rate at the outlet significantly decreases and the head pressure loss increases, a backwash with clean water is initiated, with a backwash intensity of at least 40–50 m³ / m. 2 The backwash wastewater is collected through the water channel at the top of the adsorption filter and discharged into the sedimentation tank.

[0086] It should be further explained that the filter of the present invention is equipped with an online monitoring instrument for target pollutants at the outlet of the first channel 110C and the second channel 120C. This instrument can monitor the target pollutants in the effluent while ensuring that the total influent flow of the filter unit remains constant. mix The flow rate ratio of the upper and lower inlets is adjusted according to the following formula to ensure the treatment depth of the filter bed and improve its treatment capacity.

[0087] When 0 <C mix When ≤0.5mg / L,

[0088] When 0.5 <C mix When ≤0.8mg / L,

[0089] When 0.8 <C mix When ≤1.0mg / L,

[0090] When C mix When the concentration is ≥1.0 mg / L, the inlet and outlet water supply to the filter should be stopped immediately.

[0091] Among them, Cmix C is the on-line monitoring value of fluoride concentration in the middle channel of filter, unit mg / L; ΔC mix is the change value of fluoride concentration in monitoring period, unit mg / L; Q 下 and Q 上 are the lower / upper influent flow rate of filter, unit BV / h; R' is the adjusted lower / upper influent flow rate ratio.

[0092] Specifically, the upper / lower influent flow rate ratio is flexibly adjusted by the first influent valve 301 and the second influent valve 302, and when the effluent quality exceeds the standard limit value (or the set adsorption volume is reached), the influent is stopped, the bottom emptying valve 401 is opened, and after the filter is emptied, the water washing-desorption operation is started.

[0093] Water washing-desorption stage:

[0094] Water washing: close the effluent valves of the first channel 110C and the second channel 120C, open the bottom emptying valve 401 of the filter, and inject water from the first water distributor 1101 and the second water distributor 1201 at the top of the filter into the first reaction unit 110 and the second reaction unit 120, respectively, to soak and flush the filter, and the effluent is discharged into the effluent tank through the emptying valve 401. After 1-2 BV of water washing volume, the water washing is stopped.

[0095] Desorption: close the second influent valve 302, open the first influent valve 301, inject 2 BV of desorption agent from the desorption agent tank 400 through the metering pump into the single-sided filter body (e.g., the first reaction unit 110) through the first water distributor 1101 at the top of the filter, close the third water valve 203 and the fourth water valve 204, close the first water valve 201, so that the resin bed is completely immersed in the desorption agent. After sufficient soaking and complete desorption (about 1 hour), open the third water valve 203 and the fourth water valve 204, inject the desorption liquid into the other side of the filter body (e.g., the second reaction unit 120) through the second water distributor 1201, so that the resin bed in the other side of the filter body is completely immersed, and after complete desorption (about 1 hour), open the emptying valve 401 to discharge the initial 2 BV of desorption alkali liquid into the high-concentration desorption liquid temporary storage tank 600 outside the system, and wait for disposal.

[0096] As an alternative embodiment, desorption: close the second water inlet valve 302, open the first water inlet valve 301, inject 2BV desorption agent from the desorption agent tank 400 through the metering pump into the single-sided pool body (for example, the second reaction unit 120) through the top second water distributor 1201, close the third water distributor valve 203 and the fourth water distributor valve 204, close the second water distributor valve 202, so that the bed resin is completely immersed in the desorption agent, and after sufficient soaking for about 1 hour, the third water distributor valve 203 and the fourth water distributor valve 204 are opened, and the desorption liquid is injected into the other side pool body (for example, the first reaction unit 110) through the first water distributor 1101 through the circulating pump, so that the resin bed in the pool body is completely immersed, and after the desorption is completed (about 1 hour), the emptying valve 401 is opened, and the desorption agent (for example, 2BV desorption alkali solution) is discharged into the high-concentration desorption liquid temporary storage tank 600 outside the system, and is waiting for disposal.

[0097] As a preferred embodiment, after the above-mentioned 2BV desorption agent is used for desorption treatment, the above-mentioned desorption step is repeated using 4BV desorption agent until all the adsorption resins in the filter tank are completely desorbed, and the desorption rate is >98%; the above-mentioned 4BV desorption agent is discharged into the low-concentration desorption agent recovery tank 700 due to the lower fluorine concentration, and is used as the desorption agent for the next batch, which greatly saves the operation cost.

[0098] Regeneration stage:

[0099] The regenerant is stored in the storage tank 500, injected into the adsorption filter tank body through the first water distributor 1101 and the second water distributor 1201 at the top of the filter tank through the regeneration pump, discharged at the bottom, and returned to the regeneration liquid temporary storage tank 800 through the circulating pump 801. The process monitors the circulating acid liquid pH value in real time, starts the regeneration pump and appropriately supplements the regenerant, and maintains the pH value of the circulating liquid in the regeneration process at about 2-3. When the pH value of the adsorption filter tank effluent is less than 3, it is judged that the regeneration of the resin bed is completed.

[0100] Through the deep fluorine removal multilayer grouping type resin adsorption filter tank of the present application, the fluorine ion removal efficiency is realized and improved, the fluorine-containing industrial wastewater is discharged in accordance with the standard and the water quality is reused, and the fluorine removal cost is reduced; the upper and lower layered resin adsorption filter tank type design realizes the in-situ mixing of the upper and lower effluents, can prolong the total effluent standard period of the adsorption treatment, and can maintain the high fluorine removal effect for a long period. Due to the layered and gridded resin adsorption filter tank type design, the adsorption process can be easily realized in series and parallel in-situ switching, and the flexibility of the adsorption filter tank is improved.

[0101] In the resin adsorption process, there is still a large space from the resin adsorption water exceeding the discharge requirements to the saturation of the resin material adsorption. The present application can utilize the lower concentration adsorption water of the upper fixed bed and the slightly higher concentration adsorption water of the lower expanded bed for in-situ compounding, so that the comprehensive adsorption water can still meet the discharge limit requirements for a long time. This operation mode can fully exert the adsorption efficiency of the resin material, improve the concentration multiple of the resin material to fluorine pollutants, solve the problem of frequent regeneration of the resin bed, improve the utilization rate of the desorption agent, and at the same time, through the ingenious design of the layered and grouped filter tank, use less desorption agent for grouping and batch desorption of the filter tank, greatly reduce the amount of desorption agent, and greatly reduce the operation cost.

[0102] Specific operation of parallel to series switching: close the first and second water outlet control valves of the middle passage, close the second water inlet valve 302, only open the first water inlet valve 301, open the third and fourth water distribution valves 203 and 204, and open the filter tank bottom emptying valve 401. The adsorption water is directly discharged into the corresponding water tank.

[0103] Example 1

[0104] The method for deep fluorine removal treatment of the present embodiment using a multi-layer grouped resin adsorption filter tank is as follows:

[0105] 50 mL of NDA-F type nano-adsorption resin is filled in the upper and lower parts of the first reaction unit and the upper and lower parts of the second reaction unit respectively, and a peristaltic pump is used for water inlet. The upper water inlet flow rate is about 500 mL / h (10 BV / h), and the lower water inlet flow rate is about 1250 mL / h (25 BV / h). The adsorption water is taken from the outlet of the first passage and the second passage.

[0106] The system water inlet fluorine concentration is set to 3.0 mg / L, the water inlet pH is adjusted to 2-5, the background ion concentration is Cl - : 1500 mg / L; SO4 2- : 700 mg / L, and the water outlet fluorine discharge requirement refers to the surface water quality standard of the third class (fluorine concentration <1.0 mg / L is considered as adsorption stop).

[0107] Comparative experiment:

[0108] Compared with single fixed bed adsorption and single expanded bed adsorption, the mixed bed adsorption mode of the present embodiment has an increase of 75% in water treatment capacity per unit time compared with single fixed bed adsorption with the same adsorption volume (1800-2100 BV); compared with single expanded bed, the working adsorption volume is increased from 1146 BV to 1989 BV, which is increased by 73.6%.

[0109] The resin adsorption process is the slow adsorption of pollutants by the adsorbent until they permeate. The specific relationship between the effluent fluoride concentration and the adsorption volume is as follows: Figure 2 As shown, the effluent fluoride concentration progressed through a low-concentration stage (0-500 BV: <0.3), a stable stage (500-1000 BV: 0.1-0.38 mg / L), a ramp-up stage (1000-2000 BV: 0.5-1.0 mg / L), and a breakthrough stage (>1.0 mg / L). In engineering implementation, directly discharging the ultra-low concentration adsorbed effluent from the low-concentration and stable stages would be equivalent to wasting treatment resources and over-treating the waste.

[0110] In this embodiment, from a process design perspective, the high adsorption precision of the fixed bed and the high adsorption rate of the expanded bed are utilized simultaneously. Taking into account the adsorption characteristics of both, an in-situ mixing method is adopted to combine the high-concentration wastewater and the low-concentration wastewater in situ, thereby increasing the total adsorption volume and significantly saving investment and operating costs.

[0111] In this embodiment, a total of 6 BV of desorbent (2% NaOH) was used in the desorption stage. The fluoride concentration and alkalinity distribution in the desorption solution are as follows: Figure 3 As shown, the desorption rate is over 99%, and the volume of the high-concentration desorption solution to be treated is only 2 BV. Specific results are shown in Table 1 below.

[0112] Table 1. Defluorination effect of the multi-layer grouped resin adsorption filter in Example 1

[0113]

[0114] Example 2

[0115] The basic content of this embodiment is the same as that of embodiment 1, except that: this embodiment adopts a multi-layer grouped resin adsorption filter for deep defluorination treatment, using fluoride-containing tailwater from a water plant in Wuxi City after biological treatment and coagulation sedimentation treatment as the influent, with fluoride ion content of 3.0-3.5 mg / L, turbidity of 9.5, and sulfate ion of 12.8 mg / L.

[0116] The resin volume filled in the upper part of the first and second reaction units of the filter bed is 1 BV, and the resin volume filled in the lower part of the first and second reaction units is 1.5 BV. The pH value of the fluoride-containing wastewater is adjusted to 3.0–3.5. The influent flow rate Q is... 上 Approximately 10 BV / h, with a lower inlet flow rate Q 下About 20 BV / h, the middle mixed effluent flow rate was about 30 BV / h. The results of sampling the middle collecting pipe are shown in the table. When the cumulative adsorption volume was 200 BV, 500 BV, 1000 BV, 1500 BV, and 2000 BV, the mixed concentration of fluoride ions in the effluent was 0.2±0.1 mg / L, 0.3±0.1 mg / L, 0.5±0.1 mg / L, 0.6±0.2 mg / L, and 0.8±0.2 mg / L, respectively, and the turbidity was 1.3±0.5. After 48 h of continuous operation, the effluent quality was stable and met the fluoride control standard required by surface water Class III water. The specific results are shown in Table 2 below.

[0117] Table 2 Fluorine removal treatment effect of the multilayer grouping resin adsorption filter of Example 2

[0118] Sample No. Total treatment volume (BV) Fluoride ion concentration (mg / L) Turbidity 1 200 0.2±0.1 1.1 2 500 0.3±0.1 1.3 3 1000 0.5±0.1 1.2 4 1500 0.6±0.2 1.5 5 2000 0.8±0.2 1.6

[0119] Example 3

[0120] The method of deep fluorine removal treatment in this example uses simultaneous up and down water inlet, in-situ mixing of effluent in the middle, and under the condition of ensuring the total water inlet amount of the filter unit, according to the mixed concentration C mix of the effluent fluorine of the filter, the flow ratio of the up and down water inlet is flexibly adjusted to obtain higher treatment capacity and adsorption efficiency. The fluorine-containing wastewater of a photovoltaic enterprise in Nanjing City is used as raw water, the content of fluoride ions in the water is about 3-4 mg / L, the turbidity is 5.3, and the content of calcium ions is 400 mg / L.

[0121] The initial water inlet flow rate of the upper fixed bed was adjusted to 5 BV / h, the initial water inlet flow rate of the lower expanded bed was set to 35 BV / h, and the initial value of the flow ratio R of the water inlet flow of the expanded bed and the fixed bed was set to 7.0. During the resin adsorption operation, the flow ratio R was adjusted according to the change of the fluorine concentration of the middle mixed effluent, and the total treatment volume was recorded. By fully exerting the adsorption efficiency of the resin material and adjusting the water inlet ratio of the upper and lower beds, the effect of prolonging the operation cycle and improving the treatment capacity was achieved. The effluent quality of the system was stable during the experiment and met the surface water Class III water standard (fluorine concentration in effluent <1.0 mg / L). The specific results are shown in Table 3 below.

[0122] Table 3 Fluorine removal effect of the resin adsorption filter of Example 3

[0123] Sample No. Total treatment volume (BV) R Fluoride concentration in effluent 1 300 7.0 0.03 2 530 6.3 0.11 3 783 5.7 0.20 4 956 5.1 0.29 5 1064 4.5 0.38 6 1181 4.1 0.49 7 1335 3.3 0.58 8 1614 2.6 0.69 9 1846 2.1 0.81 10 2053 1.47 0.90 11 2388 1.02 0.99

[0124] The above is only part of the embodiments of the present application, and is not any form and substantial limitation of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the method of the present application, several improvements and supplements can also be made, which should be considered as the protection scope of the present application. Meanwhile, without departing from the purpose of the present application, similar structure and embodiments of the technical scheme can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. Use of a multi-layered packed resin adsorber filter in the treatment of pollutants, characterized in that: The multi-layered packed resin adsorption filter tank comprises a filter tank body (100), the inside of the filter tank body (100) is divided into a first reaction unit (110) and a second reaction unit (120) by a partition plate, a first fixed bed reaction zone (110A) and a first expanded bed reaction zone (110B) are arranged in the first reaction unit (110) from top to bottom, a first channel (110C) is arranged between the first fixed bed reaction zone (110A) and the first expanded bed reaction zone (110B), and the effluent of the first fixed bed reaction zone (110A) and the first expanded bed reaction zone (110B) is mixed in situ in the first channel (110C); a second fixed bed reaction zone (120A) and a second expanded bed reaction zone (120B) are arranged in the second reaction unit (120) from top to bottom, a second channel (120C) is arranged between the second fixed bed reaction zone (120A) and the second expanded bed reaction zone (120B), the effluent of the second fixed bed reaction zone (120A) and the second expanded bed reaction zone (120B) is mixed in situ in the second channel (120C), and an effluent outlet is arranged on the first channel (110C) and the second channel (120C); The method of the application comprises: water distribution devices arranged on the top and bottom of the first reaction unit and the second reaction unit respectively, which respectively supply water to the first reaction unit and the second reaction unit at flow rates Q 上 and Q 下 Simultaneously supplying water to the filter tank from the top and the bottom, so that the adsorption material filled in the first reaction unit forms a first fixed bed reaction zone and a first expanded bed reaction zone, the adsorption material filled in the second reaction unit forms a second fixed bed reaction zone and a second expanded bed reaction zone, and the effluent of the first fixed bed reaction zone and the first expanded bed reaction zone is mixed in situ in the first channel before being discharged, and the effluent of the second fixed bed reaction zone and the second expanded bed reaction zone is mixed in situ in the second channel before being discharged. wherein the pollutants are fluorine-containing wastewater, and the specific application method comprises the following steps: (1) adjusting the pH value of the wastewater to 2-5 by using hydrochloric acid; (2) the fluorine-containing wastewater after acidification adjustment in step (1) is pumped into the filter tank at flow rates Q 下 and Q 上 from the lower part and the upper part of the filter tank respectively; wherein the flow rate of the lower water inlet Q 下 is 15-35 BV / h, the flow rate of the upper water inlet Q 上 is 5-15 BV / h, and the flow rate ratio of the lower water inlet to the upper water inlet is R, R = Q 下 / Q 上 ; (3) In the case of ensuring the total influent quantity of filter units, combined with the mixed concentration C mix of filter effluent, the flow rate ratio of the influent is adjusted according to the following formula to improve the treatment capacity of the filter, When 0 < C mix ≤ 0.5 mg / L, ; when 0.5 < C mix ≤ 0.8 mg / L, ; when 0.8 < C mix ≤ 1.0 mg / L, ; When C mix > 1.0 mg / L, the water inflow of the filter should be stopped immediately. Wherein, C mix is the online monitoring value of fluorine concentration in the middle channel of the filter tank, unit: mg / L; ΔC mix is the change value of the monitored fluorine concentration in the monitoring period, unit: mg / L; Q 下 and Q 上 are the lower / upper influent flow rates of the filter tank, unit: BV / h; is the adjusted lower / upper influent flow rate ratio.

2. Use of a multi-layer packed resin adsorber filter according to claim 1 in the treatment of pollutants, characterized in that: a first water distributor (1101) is arranged at the top of the first reaction unit (110), a third water distributor (1102) is arranged at the bottom of the first reaction unit (110), a second water distributor (1201) is arranged at the top of the second reaction unit (120), a fourth water distributor (1202) is arranged at the bottom of the second reaction unit (120), a flow guide plate and an overflow weir are arranged in the first channel (110C) and the second channel (120C) to realize the in-situ mixing of the effluent of the fixed bed reaction zone and the expanded bed reaction zone and control the stability of the effluent flow rate, and the ratio of the horizontal span D1 of the overflow weir to the bottom closing span D2 of the flow guide plate is between 1.0 and 7.

0.

3. Use of a multi-layer packed resin adsorber filter according to claim 1 in the treatment of pollutants, characterized in that: The height ratio between the first expanded bed reaction zone (110B) and the first fixed bed reaction zone (110A) is 1.2-1.5, and the height ratio between the second expanded bed reaction zone (120B) and the second fixed bed reaction zone (120A) is 1.2-1.

5.

4. Use of a multi-layer packed resin adsorber filter according to claim 2 in the treatment of pollutants, characterized in that: A water-permeable brick layer (1310) is arranged at the bottom of the first expanded bed reaction zone (110B), the water-permeable brick layer at the bottom of the first expanded bed reaction zone (110B) and the bottom of the first reaction unit (110) form a first cavity (110D), and the third water distributor (1102) is arranged in the first cavity (110D); a water-permeable brick layer (1310) is arranged at the bottom of the second expanded bed reaction zone (120B), the water-permeable brick layer at the bottom of the second expanded bed reaction zone (120B) and the bottom of the second reaction unit (120) form a second cavity (120D), and the fourth water distributor (1202) is arranged in the second cavity (120D).

5. The use of a multi-layer packed resin adsorber filter according to claim 2 in the treatment of pollutants, characterized in that: The first water distributor (1101) is connected with the water inlet tank (200) through a first water distribution pipeline (1410), and a first water distribution valve (201) is arranged on the first water distribution pipeline (1410); the second water distributor (1201) is connected with the water inlet tank (200) through a second water distribution pipeline (1420), and a second water distribution valve (202) is arranged on the second water distribution pipeline (1420); The third water distributor (1102) is connected with the water inlet tank (200) through a third water distribution pipeline (1510), and a third water distribution valve (203) is arranged on the third water distribution pipeline (1510); the fourth water distributor (1202) is connected with the water inlet tank (200) through a fourth water distribution pipeline (1520), and a fourth water distribution valve (204) is arranged on the fourth water distribution pipeline (1520).

6. Use of a multi-layer packed resin adsorber filter according to claim 5 in the treatment of pollutants, characterized in that: The first water distribution pipeline (1410) and the second water distribution pipeline (1420) are connected with the water inlet tank (200) through an upper water inlet pipeline (210), and a first water inlet valve (301) is arranged on the upper water inlet pipeline (210); The third water distribution pipeline (1510) and the fourth water distribution pipeline (1520) are connected with the water inlet tank (200) through a lower water inlet pipeline (220), and a second water inlet valve (302) is arranged on the lower water inlet pipeline (220).

7. Use of a multi-layer packed resin adsorber filter according to any one of claims 1 to 6 for the treatment of pollutants, characterized in that: A monitoring instrument is arranged at the water outlet of the first channel (110C) and the second channel (120C) to monitor the concentration of target pollutants in water.

8. Use of a multi-layer packed resin adsorber filter according to claim 6 in the treatment of pollutants, characterized in that: The filter tank is further provided with a desorption agent storage tank (400) and a regenerant storage tank (500), the desorption agent storage tank (400) is connected with the first water distributor (1101) and the second water distributor (1201) through a pipeline via a desorption pump, the regenerant storage tank (500) is connected with the first water distributor (1101) and the second water distributor (1201) through a pipeline via a regenerant pump, an acid liquid temporary storage tank (800) is arranged on the pipeline connecting the desorption agent storage tank (400) with the first water distributor (1101) and the second water distributor (1201) to store and supplement the circulating acid liquid consumed in the mixed resin regeneration process.

9. Use of a multi-layer packed resin adsorber filter according to claim 1 in the treatment of pollutants, characterized in that: When the filter tank performs the adsorption operation, the first reaction unit and the second reaction unit in the filter tank adopt parallel or series adsorption forms and can be switched between parallel / series; when the filter tank performs the desorption operation, the first reaction unit and the second reaction unit in the filter tank adopt series desorption forms.

10. The use of a multi-layer packed resin adsorber filter according to claim 8 in the treatment of pollutants, characterized in that: The desorption is a water washing-desorption process, and the specific operation is as follows: (1) Close the water outlet valves of the first channel and the second channel, open the filter tank bottom emptying valve, inject water from the first water distributor and the second water distributor into the first reaction unit and the second reaction unit of the filter tank respectively, perform soaking and flushing, and discharge the water into the water outlet tank through the emptying valve, and stop water washing after 1-2 bed volumes of water washing; (2) Close the second water inlet valve, open the first water inlet valve, inject the desorption agent into the first reaction unit of the single-side pool body through the first water distributor from the desorption agent storage tank via the metering pump, close the third and fourth water distributors, and close the first water distributor, so that the resin in the first reaction unit is immersed in the desorption agent. After complete immersion and desorption, open the third and fourth water distributors, inject the desorption liquid into the second reaction unit of the other-side pool body through the second water distributor via the circulating pump, so that the resin in the second reaction unit is immersed in the desorption agent. After complete desorption, open the emptying valve to empty the desorption agent.

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