High-salt industrial wastewater treatment device

Abstract

The invention provides a high-salt industrial wastewater treatment device, and relates to the technical field of wastewater treatment, the wastewater treatment device comprises a mixed bed shell, a resin bed, a resin state on-line monitoring system, a resin state adjusting system and a self-adaptive control unit; the on-line monitoring system monitors the pressure drop of the resin bed and the ion concentration or water quality purity of effluent in real time, and transmits data to the self-adaptive control unit; the self-adaptive control unit judges whether a resin state adjusting program is triggered or not according to the monitoring data and sends an instruction to a resin state adjusting system; and the resin state adjusting system executes backwashing operation or adds a resin regenerant according to the instruction to realize regeneration and blockage relief of the resin bed. The system can sense the working state of the resin in real time, automatically execute regeneration and cleaning, effectively relieve blockage, recover the exchange capacity of the resin, remarkably improve the treatment efficiency and the stability of the effluent quality, and reduce the operation and maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a high-salinity industrial wastewater treatment device. BACKGROUND

[0002] High-salinity industrial wastewater refers to industrial discharge wastewater containing high concentrations of inorganic salts, commonly found in chemical, pharmaceutical, power, metallurgical and other industries. If such wastewater is directly discharged, it will cause serious harm to water bodies, soil and the ecological environment, so it must be effectively treated. Mixed bed (mixed ion exchange bed) is one of the key equipment in deep desalination treatment, which removes anions and cations in water through ion exchange resin displacement reaction, thereby obtaining high-purity water.

[0003] Conventional mixed bed devices usually include a shell containing cation and anion exchange resins, water inlet and outlet structures. During operation, raw water flows through the resin layer from top to bottom, and the cation resin releases H + in the water to replace the cations, and the anion resin releases OH - to replace the anions in the water, and the displaced H + and OH - combine to form water, thereby achieving desalination. However, traditional mixed beds have problems such as clogging due to increasing pressure drop of the resin layer during long-term operation, and water quality degradation after the resin exchange capacity is saturated, and usually rely on manual experience or fixed cycles for backwashing and regeneration, which is not only cumbersome to operate and has low regeneration efficiency, but also cannot respond to changes in resin state in real time, easily causing low resin utilization, high operating costs and unstable water quality. SUMMARY

[0004] The present application aims to provide a high-salinity industrial wastewater treatment device to solve the technical problems presented in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The application discloses a high-salt industrial wastewater treatment device, which comprises a mixed bed shell, a resin bed, a resin state online monitoring system, a resin state adjusting system and a self-adaptive control unit, wherein the mixed bed shell is provided with a water inlet structure at the top and a water outlet structure at the bottom; the resin bed is filled in the middle part of the mixed bed shell and is divided into a negative resin layer and a positive resin layer, and is used for separating salt in wastewater through a displacement reaction; the resin state online monitoring system is arranged in the mixed bed shell and is used for monitoring the pressure drop of the resin bed and the ion concentration or water quality purity change in the outlet water in real time, and transmitting the monitoring data to the self-adaptive control unit; the self-adaptive control unit is arranged on the outer wall of the mixed bed shell, determines whether the condition of adjusting the resin state is reached based on the feedback of the resin state online monitoring system at least, and sends an adjusting instruction to the resin state adjusting system; and the resin state adjusting system is used for receiving the adjusting instruction sent by the self-adaptive control unit, adjusting the state of the resin bed through backwashing and adding a resin regenerant, so as to regenerate the resin bed and relieve the blockage.

[0007] Based on the technical scheme, the application further provides the following optional technical schemes.

[0008] In an optional scheme, the resin state online monitoring system comprises a resin bed layer pressure difference sensor and a resin failure early warning sensor; the resin bed layer pressure difference sensor is connected between the water inlet and the water outlet of the mixed bed shell and is used for monitoring the pressure drop of the resin bed in real time; and the resin failure early warning sensor is arranged on the pipeline of the water outlet structure, is an online ion concentration meter or a resistivity instrument, and is used for monitoring the ion concentration or water quality purity change in the outlet water in real time, so as to determine the attenuation degree of the resin exchange capacity.

[0009] In an optional scheme, the resin bed layer pressure difference sensor is divided into a positive pressure end and a negative pressure end; the positive pressure end is installed on the side wall of the mixed bed shell and is located below the water inlet; and the negative pressure end is installed above the water outlet of the side wall of the mixed bed shell, and the pressure drop of the resin bed is monitored from the upper side and the lower side respectively; the positive pressure end and the negative pressure end both comprise a pressure tapping pipe and a transmitter; one end of the pressure tapping pipe is connected to the pressure tapping port of the side wall of the mixed bed shell, and the other end extends to the lower side of the water inlet or the upper side of the water outlet; and the transmitter is arranged at the pressure tapping port and is used for monitoring pressure; the pressure tapping ports of the positive pressure end and the negative pressure end are at the same horizontal height, so that the influence of liquid level difference on measurement is eliminated.

[0010] In an alternative, the top of the mixed bed housing is provided with at least one upper resin injection pipe for introducing liquid anion resin into the mixed bed housing and at least one regenerant injection pipe for introducing lye into the mixed bed housing; the bottom of the mixed bed housing is provided with a backwash pipe connected to the pipe of the water outlet structure through a three-way control valve for injecting cleaning water for backwashing into the mixed bed housing and a lower resin injection pipe connected to the inside of the mixed bed housing for injecting liquid cation resin into the mixed bed housing.

[0011] In an alternative, the upper and lower sides of the resin bed are respectively provided with an upper water distribution plate and a lower water distribution plate, the upper water distribution plate is formed by a plurality of pipe bodies staggered and has a concave curved surface shape as a whole, and the upper water caps are protruded from the lower surface of the upper water distribution plate; the lower water distribution plate has the same structure and shape as the upper water distribution plate, and the surface of the lower water distribution plate has a plurality of lower water caps protruded from the upper surface.

[0012] In an alternative, an intermediate drainage layer is formed between the anion resin layer and the cation resin layer, and the intermediate drainage layer is provided with an intermediate drainage structure, the intermediate drainage structure includes an annular main pipe, a drainage end and a plurality of branch pipe portions, the annular main pipe is arranged in a ring shape along the inside of the mixed bed housing, the plurality of branch pipe portions are staggered in the annular main pipe, a large number of small holes or slits are drilled or opened on the surface of the branch pipe portions for collecting liquid, the drainage end is arranged on the outer wall of the mixed bed housing and is in communication with the annular main pipe, and a plurality of layered sensors are arranged on the inner wall of the annular main pipe for detecting the layering effect of the anion resin layer and the cation resin layer.

[0013] In an alternative, the water inlet structure includes a water inlet end and a water inlet pipe, the water inlet end is arranged at the middle position of the top of the mixed bed housing and is connected to the waste water supply device, the water inlet pipe is connected to the water inlet end and extends to the end in the mixed bed housing, and the bottom end of the water inlet pipe is provided with a plurality of transversely extending shunt pipes, the outer wall of the shunt pipes is distributed with shunt holes; the lower side of the backwash pipe is further provided with a spiral air pipe portion having air holes on the outer wall, and one end of the air pipe portion extends to the outside of the mixed bed housing and is connected to the air supply device.

[0014] In an alternative, the outer wall of the mixed bed housing is further provided with a plurality of observation ports near the intermediate drainage layer, and a camera unit is arranged on the observation ports through a support.

[0015] By using the above technical scheme, the present application has the following beneficial effects:

[0016] This invention achieves real-time sensing and intelligent judgment of the resin bed's working status through the synergistic effect of an online resin status monitoring system and an adaptive control unit. This enables timely and precise triggering of regeneration or backwashing procedures, effectively preventing reduced treatment efficiency and deterioration of effluent quality caused by resin blockage or failure. The adaptive control strategy dynamically adjusts maintenance timing based on actual operating data (pressure drop, effluent quality), replacing the traditional fixed-cycle maintenance method. This significantly improves resin utilization efficiency, extends resin lifespan, and reduces regenerant consumption and operating costs. The resin status adjustment system integrates backwashing and regeneration functions. It effectively alleviates resin bed blockage through reverse water flow and precisely regenerates anion and cation resins by separately adding acid and alkali regenerants. This results in high regeneration efficiency, a high degree of automation, reduced manual intervention, and ensures long-term stable operation of the device. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the high-salt industrial wastewater treatment device of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal shaft side structure of a high-salt industrial wastewater treatment device in one embodiment of the present invention.

[0020] Figure 3 This is a front view of the interior of a high-salt industrial wastewater treatment device according to one embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the distribution structure of the upper and lower water distribution plates in one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the intermediate drainage structure in one embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the resin bed differential pressure sensor structure in one embodiment of the present invention.

[0024] Figure reference numerals: Mixed bed shell 100, water inlet structure 110, water inlet end 111, water inlet pipe 112, diversion pipe 113, diversion hole 114, water outlet structure 120, three-way control valve 121, backflow pipe 130, lower resin injection pipe 140, upper resin injection pipe 150, regenerant injection pipe 160, intermediate drainage layer 170, adaptive control unit 200, observation port 300, camera unit 310, upper water distribution plate 400, upper water cap 410, lower water distribution plate 500, lower water cap 510, intermediate drainage structure 600, annular main pipe 610, branch pipe section 620, drainage end 630, stratification sensor 640, resin bed differential pressure sensor 700, pressure tapping pipe 710, transmitter 720, resin bed 800, air pipe section 900, air inlet end 910. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0027] In one embodiment, such as Figures 1-3 As shown, a high-salt industrial wastewater treatment device includes a mixed bed shell 100, a resin bed 800, a resin state online monitoring system, a resin state adjustment system, and an adaptive control unit 200. The mixed bed shell 100 has an inlet structure 110 at the top and an outlet structure 120 at the bottom. The resin bed 800 is filled in the middle of the mixed bed shell 100 and is divided into an anion resin layer and a cation resin layer for separating salts in the wastewater through a displacement reaction. The resin state online monitoring system is located inside the mixed bed shell 100 and is used to monitor the pressure drop of the resin bed 800 in real time. The system monitors changes in ion concentration or water purity in the effluent and transmits the monitoring data to the adaptive control unit 200. The adaptive control unit 200 is located on the outer wall of the mixed bed shell 100. Based at least on feedback from the online resin state monitoring system, it determines whether the conditions for adjusting the resin state have been met and sends an adjustment command to the resin state adjustment system. The resin state adjustment system receives the adjustment command sent by the adaptive control unit 200 and adjusts the state of the resin bed 800 by backwashing and adding resin regenerator to achieve regeneration of the resin bed 800 and alleviate clogging.

[0028] In this embodiment of the invention, initially, the resin bed 800 is placed in the mixed bed shell 100 in a stratified state of cation and anion resins. The cation resin, due to its relatively higher density, settles in the lower layer, forming a cation resin layer, while the anion resin floats in the upper layer, forming an anion resin layer. High-salt industrial wastewater enters the mixed bed shell 100 through the inlet structure 110 and flows through the resin bed 800 towards the outlet structure 120. When the high-salt industrial wastewater passes through the resin bed 800, the cations in the water react with the hydrogen ions (H+) on the cation resin. + Anions exchange with hydroxide ions (OH-) on the anion exchange resin. - The exchange is performed, and the resulting H + and OH - The system combines the generated water to remove salts and obtain high-purity water. This high-purity water is discharged through the effluent outlet 120. During a period of operation, the online resin status monitoring system continuously monitors the pressure drop of the resin bed 800 and changes in ion concentration or water purity in the effluent. The pressure drop reflects the pressure loss in the resin bed 800, indicating the clogging status of the cation and anion resins. Changes in ion concentration or water purity directly reflect the degree of degradation of the resin bed 800, i.e., its resin exchange capacity. The online resin status monitoring system transmits the monitored data to the adaptive control unit 200. Based on this data, the adaptive control unit 200 analyzes and determines whether a clogging mitigation procedure and a resin regeneration procedure are needed. When the pressure drop of the resin bed 800 exceeds a preset threshold (typically 0.4 MPa), severe clogging occurs, requiring a clogging mitigation procedure. In the first step, the device is stopped (i.e., wastewater treatment is stopped). The resin condition adjustment system injects cleaning water into the mixed bed shell 100 through backwashing. The impact and friction of the reverse water flow loosen and expand the compacted resin bed, and wash away pollutants such as suspended solids, colloids, and broken resin particles trapped in the resin gaps. When the effluent ion concentration or water purity changes beyond a preset threshold, the resin regeneration program is automatically triggered. The resin regeneration program first expands the resin bed 800 through backwashing, and the anion resin layer and cation resin layer are clearly separated, and the backwash drainage becomes clear. Then, resin regenerants are introduced into the anion resin layer and cation resin layer respectively. The regenerants are acid and alkali solutions. The alkali solution enters from the top of the mixed bed shell 100 and slowly flows through the upper anion resin layer to react with the exhausted anion resin. The acid solution enters from the bottom of the mixed bed shell 100 and slowly flows through the lower cation resin layer to react with the exhausted cation resin.

[0029] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the online resin status monitoring system includes a resin bed differential pressure sensor 700 and a resin failure early warning sensor. The resin bed differential pressure sensor 700 is connected between the inlet and outlet of the mixed bed shell 100 and is used to monitor the pressure drop of the resin bed 800 in real time. The resin failure early warning sensor is installed on the pipe of the outlet structure 120 and is an online ion concentration meter or resistivity meter. It is used to monitor the changes in ion concentration or water purity in the effluent in real time to determine the degree of resin exchange capacity decay. In this embodiment of the invention, the resin bed differential pressure sensor 700 is divided into a positive pressure end and a negative pressure end. The positive pressure end is installed in the mixed bed shell 100. On the side wall of the bed housing 100, located below the inlet, the negative pressure end is installed above the outlet on the side wall of the mixed bed housing 100, monitoring the pressure drop of the resin bed 800 from both the upper and lower sides respectively; both the positive and negative pressure ends include a pressure tapping pipe 710 and a transmitter 720. One end of the pressure tapping pipe 710 is connected to the pressure tapping port on the side wall of the mixed bed housing 100, and the other end extends to the lower side of the inlet or the upper side of the outlet. The transmitter 720 is located at the pressure tapping port and performs pressure monitoring; the pressure tapping ports of the positive and negative pressure ends are at the same horizontal height to eliminate the influence of liquid level difference on the measurement and ensure that the pressure difference data truly reflects the pressure loss of the resin bed 800.

[0030] In one embodiment, such as Figures 1-3 As shown, the top of the mixed bed shell 100 is provided with at least one upper resin injection pipe 150 and at least one regenerant injection pipe 160. The upper resin injection pipe 150 is used to introduce liquid anion resin into the mixed bed shell 100, and the regenerant injection pipe 160 is used to introduce alkaline solution from the resin regenerant into the mixed bed shell 100. The bottom of the mixed bed shell 100 is provided with a backwash pipe 130 and a lower resin injection pipe 140. The backwash pipe 130 is connected to the pipe of the outlet structure 120 through a three-way control valve 121, and is used to inject cleaning water for backwashing into the mixed bed shell 100. The lower resin injection pipe 140 is connected to the interior of the mixed bed shell 100, and is used to inject cleaning water for backwashing into the mixed bed shell 100. Liquid cation exchange resin is injected into the bed shell 100. In this embodiment of the invention, pumps and flow meters are installed on the backwash pipe 130, the lower resin injection pipe 140, the upper resin injection pipe 150, and the regenerant injection pipe 160. The pumps are used to control the flow rate and flow of the liquid flowing from the backwash pipe 130, the lower resin injection pipe 140, the upper resin injection pipe 150, or the regenerant injection pipe 160 into the mixed bed shell 100. The flow meters can monitor the flow data in the pipes in real time and feed it back to the adaptive control unit 200. The adaptive control unit 200 controls the backwashing degree and the amount of regenerant injected according to the degree of blockage of the resin bed 800 and the degree of decay of the resin exchange capacity.

[0031] In one embodiment, such as Figures 1-4As shown, the resin bed 800 is provided with an upper water distribution plate 400 and a lower water distribution plate 500 on its upper and lower sides, respectively. The upper water distribution plate 400 has upper water caps 410 distributed on it. The upper water distribution plate 400 is formed by multiple interlaced tubes and has an overall concave curved shape. The upper water caps 410 protrude from the lower surface of the upper water distribution plate 400. The lower water distribution plate 500 has the same structure and shape as the upper water distribution plate 400, and its surface has multiple lower water caps 510 protruding from its upper surface. In this embodiment of the invention, the upper water distribution plate 400 can forcibly and uniformly disperse wastewater and other liquids before they enter the resin bed 800 throughout the entire surface. In cross-section, multiple upper water caps 410 guide the water flow to the resin bed 800 in a dot matrix pattern, and use the gaps or meshes on their surfaces to refine the water flow, avoiding excessively high or low local flow velocities and ensuring maximum utilization of the resin exchange capacity; the surface of the lower water cap 510 has a large number of extremely fine gaps or meshes, the width of which (usually 0.2 mm to 0.4 mm) is much smaller than the smallest resin particles (usually greater than 0.4 mm). These fine gaps are like a "sieve", allowing water and ions in the water to pass freely, but effectively blocking resin particles and preventing them from entering subsequent processes or being discharged with the water flow.

[0032] In one embodiment, such as Figures 1-5 As shown, an intermediate drainage layer 170 is formed between the anion resin layer and the cation resin layer. An intermediate drainage structure 600 is installed in the intermediate drainage layer 170. The intermediate drainage structure 600 includes an annular main pipe 610, a drainage end 630, and multiple branch pipes 620. The annular main pipe 610 is arranged annularly along the inside of the mixed bed shell 100. The multiple branch pipes 620 are staggered inside the annular main pipe 610. The surface of each branch pipe 620 has numerous small holes or slits for collecting liquid. The drainage end 630 is located on the outer wall of the mixed bed shell 100 and is connected to the annular main pipe 610. Multiple stratification sensors 640 are also installed on the inner wall of the annular main pipe 610. The stratification sensors 640 are used to detect the stratification effect of the anion resin layer and the cation resin layer. In this embodiment of the invention, backwashing... The water and acid / alkali solutions from the resin regenerator after cleaning the resin accumulate in the intermediate drainage layer 170. They are absorbed by multiple branch pipes 620 and guided through the ring header 610, finally being discharged from the drain end 630. The stratification sensor 640 includes a turbidity sensor and a level sensor. The turbidity sensor detects the backwash drainage. Initially, the turbidity will increase due to impurities (possibly reaching 10-20 NTU), and should gradually decrease as backwashing progresses. When the drainage turbidity is ≤5 NTU (close to the quality of the backwash water) and there are no obvious particulate impurities (which can be detected through a transparent observation tube or by sampling), it indicates that the suspended matter and colloids adsorbed on the resin surface have been washed away. If the turbidity remains >10 NTU, the backwash time needs to be extended or cleaning agent (such as dilute hydrochloric acid) needs to be added. The level sensor monitors the stratification of the anion and cation resins to confirm that the stratification is obvious.

[0033] In one embodiment, such as Figures 1-4 As shown, the water inlet structure 110 includes an inlet end 111 and an inlet pipe 112. The inlet end 111 is installed at the top center of the mixed bed shell 100 and is connected to the wastewater supply device. The inlet pipe 112 is connected to the end of the inlet end 111 extending into the mixed bed shell 100. Multiple laterally extending diversion pipes 113 are provided at the bottom end of the pipe, and diversion holes 114 are distributed on the outer wall of the diversion pipes 113. A spiral-shaped air pipe section 900 is also provided on the lower side of the backflow pipe 130. Air holes are present on the outer wall of the air pipe section 900. One end of the air pipe section 900 extends... Extending to the outside of the mixed bed shell 100 and connected to the air supply device; in this embodiment of the invention, the wastewater supply device sends high-salt industrial wastewater into the inlet end 111, flows into multiple diversion pipes 113 through the inlet pipe 112, and then flows downward after being diverted by the diversion holes 114 on the diversion pipes 113. During the downward flow, the air supply device supplies air to the inside of the air pipe section 900 through the air inlet end 910. The airflow is ejected through the air holes on the outer wall of the air pipe section 900. The airflow disturbs the downward flowing waste liquid, so that it can flow evenly to the resin bed 800 and improve the effect of the displacement reaction.

[0034] In one embodiment, such as Figures 1-3 As shown, the outer wall of the mixed bed shell 100 is also provided with a plurality of observation ports 300. The observation ports 300 are located near the intermediate drainage layer 170, and a camera unit 310 is mounted on the observation port 300. In this embodiment of the invention, the camera unit 310 can observe the condition of the intermediate drainage layer 170 through the observation port 300 to form an image and transmit the image data to the adaptive control unit 200, thereby more clearly identifying the layering state of the cation resin layer and the anion resin layer.

[0035] The above embodiment provides a high-salinity industrial wastewater treatment device, the working principle of which is as follows:

[0036] Initially, the resin bed 800 is placed in a stratified state within the mixed bed shell 100. The denser cation resin settles at the bottom to form a cation resin layer, while the less dense anion resin floats at the top to form an anion resin layer. High-salt industrial wastewater enters the mixed bed shell 100 through the inlet structure 110 and is uniformly dispersed through the diversion holes 114 on the inlet pipe 112 and the diversion pipe 113. As the wastewater flows downward through the resin bed 800, the cations in the water react with the H+ ions on the cation resin. + Ion exchange occurs, with anions reacting with OH groups on the anion exchange resin. - Ions exchange, and the H+ produced by the exchange + and OH - The water is combined with the generated water to remove salt and obtain high-purity water. The purified water is evenly collected by the upper water distribution plate 400 and the lower water distribution plate 500, and finally discharged through the water outlet structure 120.

[0037] During the operation of the device, the resin condition online monitoring system monitors the condition of the resin bed 800 in real time:

[0038] The resin bed differential pressure sensor 700 is connected between the inlet and outlet of the mixed bed housing 100. It monitors the pressure drop of the resin bed 800 in real time through the pressure tapping pipes 710 on the positive and negative pressure ends and the transmitter 720, reflecting the blockage of the resin bed.

[0039] The resin failure early warning sensor is installed on the pipeline of the outlet structure 120 with an online ion concentration meter or resistivity meter to monitor the changes in ion concentration or water purity in the outlet water in real time and determine the degree of decay of the resin exchange capacity.

[0040] The monitoring data is transmitted to the adaptive control unit 200 in real time, and the adaptive control unit 200 makes intelligent judgments based on preset thresholds.

[0041] When the pressure drop in resin bed 800 exceeds 0.4 MPa, it is determined to be a severe blockage, triggering the blockage relief procedure.

[0042] When the ion concentration or water purity of the effluent exceeds a preset threshold, the resin exchange capacity is determined to have decreased, triggering the resin regeneration process.

[0043] Blockage relief procedure: The device stops operating, and the resin condition adjustment system starts backwashing; the backwash pipe 130 is connected to the outlet structure 120 through the three-way control valve 121, injecting cleaning water into the mixed bed shell 100; the reverse water flow impacts the resin bed 800, loosening and compacting the resin layer, and washing away contaminants such as suspended solids, colloids and broken resin particles; the backwash water and contaminants are collected through the branch pipe 620 and the annular header 610 of the intermediate drainage structure 600 and discharged from the drain end 630;

[0044] The 640 turbidity sensor and liquid level sensor monitor the turbidity of the backwash drainage and the resin stratification effect, ensuring thorough cleaning and clear stratification.

[0045] Resin regeneration process: First, backwashing is performed to expand the resin bed 800, clearly separating the anion and cation resin layers; then, alkali solution is injected from the top of the mixed bed shell 100 through the regenerant injection pipe 160, slowly flowing through the anion resin layer to react with the exhausted anion resin; acid solution is injected from the bottom of the mixed bed shell 100 through the lower resin injection pipe 140, slowly flowing through the cation resin layer to react with the exhausted cation resin; the regenerated waste liquid is discharged through the intermediate drainage structure 600; the pumps and flow meters on the backwash pipe 130, lower resin injection pipe 140, upper resin injection pipe 150, and regenerant injection pipe 160 adjust the flow rate and volume in real time to ensure regeneration effect.

[0046] Auxiliary functions: The air tube 900 is located below the backflow pipe 130. Airflow is ejected through the air vents via the air supply device, disturbing the downward-flowing waste liquid and improving the displacement reaction effect. The camera unit 310 at the observation port 300 observes the intermediate drainage layer 170 in real time and transmits the image data to the adaptive control unit 200 to assist in determining the resin stratification state.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A high-salinity industrial wastewater treatment device, comprising a mixed bed shell, a resin bed, an online resin state monitoring system, a resin state adjustment system, and an adaptive control unit, characterized in that, The mixed bed shell has a water inlet structure at the top and a water outlet structure at the bottom; The resin bed is filled in the middle of the mixed bed shell and is divided into an anion resin layer and a cation resin layer, which are used to separate salts in wastewater through a displacement reaction. The resin status online monitoring system is located inside the mixed bed shell. It is used to monitor the pressure drop of the resin bed and the changes in ion concentration or water purity in the effluent in real time, and transmit the monitoring data to the adaptive control unit. The adaptive control unit is located on the outer wall of the mixed bed shell. Based at least on the feedback from the resin state online monitoring system, it determines whether the conditions for adjusting the resin state have been met and sends an adjustment command to the resin state adjustment system. The resin state adjustment system is used to receive adjustment commands sent by the adaptive control unit and adjust the state of the resin bed by backwashing and adding resin regenerator, so as to realize the regeneration of the resin bed and alleviate blockage.

2. The high-salinity industrial wastewater treatment device according to claim 1, characterized in that, The online resin condition monitoring system includes a resin bed differential pressure sensor and a resin failure early warning sensor; The resin bed differential pressure sensor is connected between the inlet and outlet of the mixed bed shell to monitor the pressure drop of the resin bed in real time. The resin failure early warning sensor is installed on the pipe of the water outlet structure. It is an online ion concentration meter or resistivity meter, used to monitor changes in ion concentration or water purity in the water in real time, so as to determine the degree of decay of the resin exchange capacity.

3. The high-salinity industrial wastewater treatment device according to claim 2, characterized in that, The resin bed differential pressure sensor is divided into a positive pressure end and a negative pressure end. The positive pressure end is installed on the side wall of the mixed bed shell, located below the inlet. The negative pressure end is installed on the side wall of the mixed bed shell above the outlet, respectively monitoring the pressure drop of the resin bed from the upper and lower sides. Both the positive and negative pressure ends include pressure taps and transmitters. One end of the pressure tap is connected to the pressure tapping port on the side wall of the mixed bed shell, and the other end extends to the lower side of the inlet or the upper side of the outlet. The transmitter is located at the pressure tapping port and performs pressure monitoring. The pressure tapping ports of the positive and negative pressure ends are at the same horizontal height to eliminate the influence of liquid level difference on the measurement.

4. The high-salinity industrial wastewater treatment device according to claim 1, characterized in that, The top of the mixed bed shell is provided with at least one upper resin injection pipe and at least one regenerant injection pipe; The upper resin injection pipe is used to introduce liquid anion resin into the mixed bed shell, and the regenerator injection pipe is used to introduce alkaline solution in the resin regenerator into the mixed bed shell; the bottom of the mixed bed shell is provided with a backwash pipe and a lower resin injection pipe. The backwash pipe is connected to the water outlet structure pipe through a three-way control valve and is used to inject cleaning water for backwashing into the mixed bed shell. The lower resin injection pipe is connected to the inside of the mixed bed shell and is used to inject liquid cation resin into the mixed bed shell.

5. The high-salinity industrial wastewater treatment device according to claim 4, characterized in that, The resin bed is provided with an upper water distribution plate and a lower water distribution plate on its upper and lower sides, respectively. The upper water distribution plate is provided with upper water caps. The upper water distribution plate is formed by multiple intersecting tubes and has a concave curved shape as a whole. The upper water caps protrude from the lower surface of the upper water distribution plate. The lower water distribution plate has the same structure and shape as the upper water distribution plate, and its surface has multiple lower water caps protruding from its upper surface.

6. The high-salinity industrial wastewater treatment device according to claim 5, characterized in that, An intermediate drainage layer is formed between the anion resin layer and the cation resin layer, and the intermediate drainage layer is equipped with an intermediate drainage structure. The intermediate drainage structure includes a ring-shaped main pipe, a drainage end, and multiple branch pipe sections; The annular main pipe is arranged in a ring along the inside of the mixed bed shell, and multiple branch pipes are staggered inside the annular main pipe. The surface of the branch pipes is drilled with a large number of small holes or has slits for collecting liquid. The drainage end is located on the outer wall of the mixed bed shell and is connected to the annular main pipe; Multiple layering sensors are also installed on the inner wall of the annular mother tube. These sensors are used to detect the layering effect of the anion resin layer and the cation resin layer.

7. The high-salinity industrial wastewater treatment device according to claim 4, characterized in that, The water inlet structure includes a water inlet end and a water inlet pipe; The water inlet is installed at the top center of the mixed bed shell and is connected to the wastewater supply device. The water inlet pipe is connected to the end of the water inlet extending into the mixed bed shell. Multiple horizontally extending diversion pipes are provided at the bottom end of the pipes, and diversion holes are distributed on the outer wall of the diversion pipes. The lower side of the backflow pipe is also provided with a spiral-shaped air pipe section, which has air holes on its outer wall. One end of the air pipe section extends to the outside of the mixing bed shell and is connected to the air supply device.

8. The high-salinity industrial wastewater treatment device according to claim 1, characterized in that, The outer wall of the mixed bed shell is also provided with multiple observation ports, which are located near the middle drainage layer and are equipped with camera units by brackets.

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