Cooperative advanced treatment coupling device for various pollutants in high-salinity wastewater

Abstract

The utility model discloses a synergistic advanced treatment coupling device for multiple pollutants in high salinity wastewater, which comprises a coagulating sedimentation device, an electrocatalytic oxidation device, an activated carbon adsorption device, a coagulation air floatation device and a resin exchange device, a first dosing tank and a sedimentation tank are arranged in the coagulating sedimentation device, and the coagulation air floatation device is arranged in the first dosing tank through the arrangement of the coagulating sedimentation device. Total phosphorus and part of soluble substances in the wastewater are coagulated and flocculated to form large flocs to be precipitated, the load of a subsequent treatment unit is reduced, strong oxidizing free radicals are generated on the surface of an electrode through the arrangement of the electrocatalytic oxidation device by utilizing the electrochemical principle, organic pollutants in the wastewater are attacked and decomposed, and the treatment effect of the wastewater is improved. Meanwhile, oxidation precipitation or complex reaction of heavy metal ions is promoted, the concentration of organic matters in the wastewater and the toxicity of the heavy metal ions are remarkably reduced, and residual organic matters and trace heavy metal ions are removed through an activated carbon adsorption device by utilizing the porous structure and strong adsorption capacity of activated carbon.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a coupling device for collaborative deep treatment of multiple pollutants in high-salt wastewater. Background Art

[0002] As society's demands for ecological and environmental quality increase, the country has established a series of more stringent wastewater discharge standards to ensure that pollutant concentrations in wastewater are reduced to lower levels before discharge. To meet these increasingly stringent wastewater discharge standards, advanced wastewater treatment processes have rapidly developed. These processes aim to remove harmful substances from wastewater through more advanced technologies, achieving wastewater purification.

[0003] Heavy metals in wastewater are extremely toxic to human health and the ecological environment. These heavy metals are difficult to degrade in the environment and can be accumulated and amplified through the food chain, posing a long-term threat to the ecosystem and human health. Due to the toxicity and difficulty in degradation of heavy metals, special treatment processes are required to remove them. Although deep treatment processes have made significant progress in the field of wastewater treatment in recent years, there are still many limitations and difficulties in treating high-salt heavy metal wastewater. Traditional high-salt wastewater treatment methods have many limitations in terms of treatment effect, economic cost and environmental impact, especially the large impact on the biochemical system, the large amount of sludge generated by traditional advanced oxidation processes such as Fenton, the high concentration of residual heavy metals in the wastewater after treatment, and the difficulty in meeting emission standards. Therefore, a coupling device for the coordinated deep treatment of multiple pollutants in high-salt wastewater is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a coupling device for the coordinated deep treatment of multiple pollutants in high-salt wastewater, which solves the problems in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A coupling device for the coordinated deep treatment of multiple pollutants in high-salt wastewater, comprising a coagulation and sedimentation device, an electrocatalytic oxidation device, an activated carbon adsorption device, a coagulation and flotation device, and a resin exchange device. The coagulation and sedimentation device is provided with a first dosing tank and a sedimentation tank, the first dosing tank is provided with a water inlet pipe, the sedimentation tank is provided with a first central tube, the bottom end of the central tube is provided with a water outlet hole, the surface of the sedimentation tank is provided with a water outlet trough, the bottom surface of the water outlet trough is provided with a first water outlet, the electrocatalytic oxidation device is provided with an electrolytic cell, the bottom surface of the electrolytic cell is provided with a first inlet The electrolytic cell is provided with a plate inside, a flow channel is provided between the plates, a terminal is provided on the surface of the plate, a DC power supply is provided on the top surface of the electrolytic cell, a second water outlet is provided on the top surface of the electrolytic cell, an adsorption tank is provided inside the activated carbon adsorption device, a second water inlet is provided on the top surface of the adsorption tank, a first step water pipe is fixedly installed on the bottom end of the second water inlet, a filter plate is fixedly installed inside the adsorption tank, a first filter head is provided on the surface of the filter plate, an activated carbon layer is provided on the top surface of the filter plate, a third water outlet is provided on the bottom surface of the adsorption tank, and the coagulation The flotation device is provided with an air flotation tank and a second dosing tank inside, a third water inlet is provided on the top surface of the second dosing tank, a dissolved air releaser is provided inside the air flotation tank, a dissolved air tank is provided on the outer surface of the air flotation tank, a scraper is provided on the top surface of the air flotation tank, a slag collector is provided inside the air flotation tank, a slag discharge port is provided on the surface of the slag collector, a partition is provided inside the air flotation tank, a second filter head is provided on the surface of the partition, filler 1 and filler 2 are filled above the second filter head, a fourth water outlet is provided on the bottom surface of the air flotation tank, and a return pipe is fixedly installed on the surface of the fourth water outlet. A reflux pump is provided on the surface of the reflux pipe, a fourth water inlet is provided on the top surface of the resin exchange device, a second water pipe is fixedly installed on the bottom surface of the fourth water inlet, a top filter plate and a bottom filter plate are provided inside the resin exchange device, a third filter head is provided on the surface of the top filter plate and the bottom filter plate, a regeneration liquid inlet is provided on the surface of the resin exchange device, a second central tube is provided inside the resin exchange device, resin is provided inside the resin exchange device, a backwash liquid outlet is fixedly installed on the surface of the resin exchange device, and a fifth water outlet is provided on the bottom surface of the resin exchange device.

[0007] Preferably, a first connecting pipe is fixedly installed on the surface of the first water outlet, and the other end of the first connecting pipe is fixedly connected to the first water inlet.

[0008] Preferably, a second connecting pipe is fixedly installed on the surface of the second water outlet, and the other end of the second connecting pipe is fixedly connected to the second water inlet.

[0009] Preferably, a pH meter, an acid adding tube and an alkali adding tube are provided on the surface of the second connecting tube.

[0010] Preferably, a third connecting pipe is fixedly installed on the surface of the third water outlet, and the other end of the third connecting pipe is fixedly connected to the third water inlet.

[0011] Preferably, a fourth connecting pipe is fixedly installed on the surface of the fourth water outlet, and the other end of the fourth connecting pipe is fixedly connected to the fourth water inlet.

[0012] Preferably, the electrode plates are provided with cathode and anode plates, and the electrode plates are arranged alternately.

[0013] Preferably, a supporting foot is fixedly mounted on the bottom surface of the filter plate, an inlet 1 and an inlet 2 are opened on the surface of the adsorption tank, and the supporting foot is fixedly connected to the adsorption tank.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The coupling device for the coordinated deep treatment of multiple pollutants in high-salt wastewater, through the setting of coagulation and sedimentation device, makes the total phosphorus and some soluble substances in the wastewater coagulate and flocculate, forming larger flocs and settling them, reducing the load of subsequent treatment units.

[0016] 2. This coupled device for the coordinated deep treatment of multiple pollutants in high-salt wastewater uses an electrocatalytic oxidation device to generate strong oxidizing free radicals on the electrode surface using electrochemical principles to attack and decompose organic pollutants in the wastewater, while promoting the oxidation precipitation or complexation reaction of heavy metal ions, significantly reducing the concentration of organic matter and the toxicity of heavy metal ions in the wastewater.

[0017] 3. The coupled device for the coordinated deep treatment of multiple pollutants in high-salt wastewater uses an activated carbon adsorption device to remove residual organic matter and trace heavy metal ions using the porous structure and strong adsorption capacity of activated carbon.

[0018] 4. The coupling device for the coordinated deep treatment of multiple pollutants in high-salt wastewater, through the setting of the coagulation flotation device, introduces tiny bubbles into the wastewater, so that suspended matter and colloidal particles adhere to the bubbles and float to the water surface with the bubbles to form scum, realizing solid-liquid separation and improving wastewater treatment efficiency and effluent clarity.

[0019] 5. The coupling device for the coordinated deep treatment of multiple pollutants in high-salt wastewater uses a resin exchange device to utilize the functional groups of specific ion exchange resins to exchange with heavy metal ions in the wastewater, thereby removing heavy metal ions from the wastewater and ensuring that the heavy metal ion content in the effluent reaches an extremely low level, meeting strict environmental emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is a flow chart of the use of the present utility model.

[0022] In the figure: 1. Coagulation and sedimentation device; 1-1. First dosing tank; 1-2. Water inlet pipe; 1-3. First central pipe; 1-4. Water outlet; 1-5. Sedimentation tank; 1-6. Water outlet tank; 1-7. First water outlet; 2. Electrocatalytic oxidation device; 2-1. Electrolytic cell; 2-2. First water inlet; 2-3. Plate; 2-4. Flow channel; 2-5. Terminal block; 2-6. DC power supply; 2-7. Second water outlet; 3. Activated carbon adsorption device; 3-1. Adsorption tank; 3-2. Second water inlet; 3-3. First water pipe; 3-4. Filter plate; 3-5. First filter head; 3-6. Support foot; 3-7. Activated carbon layer; 3-8. Inlet 1; 3-9. Inlet 2; 3-10. Third water outlet; 4. Coagulation and flotation device; 4-1. Flotation tank; 4-2. Second dosing tank; 4- 3. Third water inlet; 4-4. Dissolved air releaser; 4-5. Dissolved air tank; 4-6. Scraper; 4-7. Slag collector; 4-8. Slag discharge port; 4-9. Partition; 4-10. Second filter head; 4-11. Packing material 1; 4-12. Packing material 2; 4-13. Fourth water outlet; 4-14. Reflux pipe; 4-15. Reflux pump; 5. Resin exchange device; 5-1. Fourth water inlet; 5-2. Second step water pipe; 5-3. Top filter plate; 5-4. Bottom filter plate; 5-5. Third filter head; 5-6. Regeneration liquid inlet; 5-7. Second center pipe; 5-8. Resin; 5-9. Backwash liquid outlet; 5-10. Fifth water outlet; 6. First connecting pipe; 7. Second connecting pipe; 8. Third connecting pipe; 9. Fourth connecting pipe; 10. pH meter; 11. Acid addition pipe; 12. Alkali addition pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example: Refer to Figure 1-2The utility model provides a technical solution, a coupled device for the coordinated deep treatment of multiple pollutants in high-salt wastewater, comprising a coagulation and sedimentation device 1, an electrocatalytic oxidation device 2, an activated carbon adsorption device 3, a coagulation and flotation device 4 and a resin exchange device 5. The interior of the coagulation and sedimentation device 1 is provided with a first dosing tank 1-1 and a sedimentation tank 1-5, the interior of the first dosing tank 1-1 is provided with a water inlet pipe 1-2, the interior of the sedimentation tank 1-5 is provided with a first central pipe 1-3, the bottom end of the central pipe 1-3 is provided with a water outlet hole 1-4, the surface of the sedimentation tank 1-5 is provided with a water outlet trough 1-6, and the bottom surface of the water outlet trough 1-6 is provided with a first water outlet 1-7. Through the setting of the coagulation and sedimentation device 1, the total phosphorus and some soluble substances in the wastewater are condensed and flocculated to form larger flocs and settle down, thereby reducing the load of subsequent treatment units.

[0025] Specifically, a first connecting pipe 6 is fixedly installed on the surface of the first water outlet 1-7, and the other end of the first connecting pipe 6 is fixedly connected to the first water inlet 2-2. An electrolytic cell 2-1 is provided inside the electrocatalytic oxidation device 2, and a first water inlet 2-2 is provided on the bottom surface of the electrolytic cell 2-1. Electrode plates 2-3 are provided inside the electrolytic cell 2-1. The electrode plates 2-3 are provided with cathode and anode plates, and the electrode plates 2-3 are arranged alternately, wherein the number of cathode plate groups is n and the number of anode plate groups is n-1. A flow channel 2-4 is provided between the electrode plates 2-3, and a terminal 2-5 is provided on the surface of the electrode plates 2-3. A DC power supply 2-6 is provided on the top surface of the electrolytic cell 2-1, and a second water outlet 2-7 is provided on the top surface of the electrolytic cell 2-1. Through the setting of the electrocatalytic oxidation device 2, strong oxidizing free radicals are generated on the electrode surface by utilizing electrochemical principles to attack and decompose organic pollutants in the wastewater, while promoting the oxidation precipitation or complexation reaction of heavy metal ions, significantly reducing the concentration of organic matter and the toxicity of heavy metal ions in the wastewater.

[0026] Specifically, a second connecting pipe 7 is fixedly installed on the surface of the second water outlet 2-7, and the other end of the second connecting pipe 7 is fixedly connected to the second water inlet 3-2. A pH meter 10, an acid adding pipe 11 and an alkali adding pipe 12 are provided on the surface of the second connecting pipe 7. An adsorption tank 3-1 is provided inside the activated carbon adsorption device 3, and a second water inlet 3-2 is provided on the top surface of the adsorption tank 3-1. The first step water pipe 3-3 is fixedly installed at the bottom end of the second water inlet 3-2. A filter plate 3-4 is fixedly installed inside the adsorption tank 3-1. A first filter head 3-5 is provided on the surface of the plate 3-4, a support foot 3-6 is fixedly installed on the bottom surface of the filter plate 3-4, an inlet 1 3-8 and an inlet 2 3-9 are provided on the surface of the adsorption tank 3-1, and the support foot 3-6 is fixedly connected to the adsorption tank 3-1, an activated carbon layer 3-7 is provided on the top surface of the filter plate 3-4, and a third water outlet 3-10 is provided on the bottom surface of the adsorption tank 3-1. The activated carbon adsorption device 3 is used to remove residual organic matter and trace heavy metal ions by utilizing the porous structure and strong adsorption capacity of the activated carbon.

[0027] Specifically, a third connecting pipe 8 is fixedly installed on the surface of the third water outlet 3-10, and the other end of the third connecting pipe 8 is fixedly connected to the third water inlet 4-3. The interior of the coagulation flotation device 4 is provided with an air flotation tank 4-1 and a second dosing tank 4-2. The top surface of the second dosing tank 4-2 is provided with a third water inlet 4-3. The interior of the air flotation tank 4-1 is provided with a dissolved air releaser 4-4, the outer surface of the air flotation tank 4-1 is provided with a dissolved air tank 4-5, the top surface of the air flotation tank 4-1 is provided with a scraper 4-6, the interior of the air flotation tank 4-1 is provided with a slag collector 4-7, the surface of the slag collector 4-7 is provided with a slag discharge port 4-8, and the air flotation tank 4 -1 is provided with a partition 4-9 inside, a second filter head 4-10 is provided on the surface of the partition 4-9, and a filler 1 4-11 and a filler 2 4-12 are filled above the second filter head 4-10. A fourth water outlet 4-13 is provided on the bottom surface of the flotation tank 4-1, a return pipe 4-14 is fixedly installed on the surface of the fourth water outlet 4-13, and a return pump 4-15 is provided on the surface of the return pipe 4-14. Through the setting of the coagulation flotation device 4, tiny bubbles are introduced into the wastewater, so that suspended matter and colloidal particles adhere to the bubbles and float to the water surface with the bubbles to form scum, thereby achieving solid-liquid separation and improving wastewater treatment efficiency and effluent clarity.

[0028] Specifically, a fourth connecting pipe 9 is fixedly installed on the surface of the fourth water outlet 4-13, and the other end of the fourth connecting pipe 9 is fixedly connected to the fourth water inlet 5-1. The top surface of the resin exchange device 5 is provided with a fourth water inlet 5-1, and the bottom surface of the fourth water inlet 5-1 is fixedly installed with a second-step water pipe 5-2. A top filter plate 5-3 and a bottom filter plate 5-4 are provided inside the resin exchange device 5, and a third filter head 5-5 is provided on the surface of the top filter plate 5-3 and the bottom filter plate 5-4. A regeneration liquid inlet 5-6 is provided on the surface of the resin exchange device 5, a second central pipe 5-7 is provided inside the resin exchange device 5, and resin 5-8 is provided inside the resin exchange device 5. A backwash liquid outlet 5-9 is fixedly installed on the surface of the resin exchange device 5, and a fifth water outlet 5-10 is provided on the bottom surface of the resin exchange device 5. Through the resin exchange device 5, the functional groups of the specific ion exchange resin are used to exchange with the heavy metal ions in the wastewater to remove the heavy metal ions from the wastewater, thereby ensuring that the heavy metal ion content in the effluent reaches an extremely low level and meets strict environmental protection emission standards.

[0029] During use: First, the raw water enters the first dosing tank 1-1 of the coagulation sedimentation device 1. In the first dosing tank 1-1, the pH value of the wastewater is first adjusted to alkaline. Then, FeCl3 and PAM are added according to the preset amount. Flocs are formed by the free collision of water flow in the first dosing tank 1-1. Then, flocs are formed through the water inlet pipe 1-2 set in the first dosing tank 1-1 and the first central pipe 1-3 of the sedimentation tank 1-5. The bottom of the first central pipe 1-3 is sealed, and the opening is used as the water outlet 1-4. As gravity acts, the flocs are formed. The wastewater accumulates at the bottom of the cone of the sedimentation tank 1-5, and flows out from the outlet trough 1-6 above the sedimentation tank 1-5, and enters the first water inlet 2-2 of the electrocatalytic oxidation device 2 through the first connecting pipe 6; cathode plates and anode plates are arranged inside the electrocatalytic oxidation device 2, and the plates 2-3 are arranged alternately to form a flow channel 2-4. The wastewater enters the electrolytic cell 2-1 through the first water inlet 2-2 at one end of the electrolytic cell 2-1, and passes through the flow channel 2-4 in sequence and is discharged from the second water outlet 2-7 at the other end of the electrolytic cell 2-1. Among them, the number of cathode plate groups is n, the number of anode plate groups is n-1, the end of the plate 2-3 in contact with the electrolytic cell 2-1, the upper and lower sides of the plate are fixed with insulating material, the top of the plate 2-3 is fixed with a terminal, extending outside the electrolytic cell, and the middle part is sealed with insulating glue. According to the polarity of the plate, the terminal 2-5 is connected to the cathode wire and the anode wire respectively. The electrocatalytic oxidation device 2 is powered by a DC power supply 2-6, the electrocatalytic oxidation time is 30 to 600 seconds, and the current density is 5 to 20 mA / cm 2, the treated water is discharged from the second water outlet 2-7 and enters the second water inlet 3-2 of the activated carbon adsorption device 3; the activated carbon adsorption device 3 is a tank structure, and the wastewater enters the interior through the second water inlet 3-2 on the top of the adsorption tank 3-1, and the second water inlet 3-2 is connected to the first water distribution pipe 3-3 inside the adsorption tank 3-1. The first water distribution pipe 3-3 is arranged in a "cross shape", and the water flows evenly into the tank body along the opening of the first water distribution pipe 3-3. A filter plate 3-4 is provided at the bottom of the tank, and a first filter head 3-5 is fixed on the filter plate 3-4. The filter plate 3-4 is fixed to the inner wall of the tank by a supporting foot 3-6. An activated carbon layer 3-7 is filled above the filter plate 3-4, and an inlet hole 3-8 is provided on the top of the adsorption tank 3-1 and the center of the tank body. Port 2 3-9 is used for equipment maintenance and replacement of activated carbon filler. Activated carbon has a well-developed pore structure. When liquid flows through the activated carbon, organic matter and heavy metal ions therein will be adsorbed onto the surface of the activated carbon. This adsorption is achieved through intermolecular interaction forces, such as van der Waals forces and electrostatic forces, and is a physical adsorption process. Activated carbon also has a certain chemical adsorption capacity. The surface of activated carbon contains abundant functional groups, such as carboxyl, hydroxyl, and carbonyl groups. These functional groups can chemically react with organic matter and heavy metal ions to form stable chemical bonds. After passing through the activated carbon layer 3-7, the wastewater is filtered out by the first filter head 3-5 provided on the filter plate 3-4 and enters the third water inlet 4-3 of the coagulation flotation device 4;The coagulation flotation device 4 consists of a second dosing tank 4-2 and an air flotation tank 4-1. The wastewater enters the second dosing tank 4-2 through the third water inlet 4-3 of the coagulation flotation device 4. NaOH, PAC and PAM are added to the second dosing tank 4-2 according to a preset amount. Flocs are formed by the free collision of water flow in the second dosing tank 4-2. The wastewater enters the air flotation tank 4-1 through the water collecting pipe of the second dosing tank 4-2. The bottom of the air flotation tank 4-1 is a cone bottom structure. A dissolved air releaser 4-4 is provided at the bottom of the cone bottom and is connected to an external dissolved air tank 4-5. The dissolved air tank 4-5 provides dissolved air for the dissolved air releaser 4-4. The wastewater and the bubbles in the dissolved air releaser 4-4 are mixed and fully reacted to form a large number of small bubbles in the solution. The total surface area of ​​these bubbles is large, which can easily wrap the pollutants inside, causing the suspended matter in the water to float to the surface, and then the bubbles are removed by the scraper 4-6 above. The foam layer is scraped into the slag collector 4-7 and discharged from the slag discharge port 4-8 for unified treatment. A partition 4-9 is set above the cone bottom of the flotation tank 4-1. The second filter head 4-10 is evenly arranged on the partition 4-9. The second filter head 4-10 is filled with filler 2 4-12 and filler 1 4-11 in sequence, wherein filler 1 4-11 is ceramsite filler with a filler particle size of 5 to 20 mm, and filler 2 4-12 is gravel with a filler particle size of 1 to 10 mm. The function of filler 2 4-12 and filler 1 4-11 is to isolate the flocs in the wastewater to prevent excessive suspended matter from remaining in the effluent and affecting the subsequent process. A fourth water outlet 4-13 is set below the partition 4-9. The effluent filtered by the second filter head 4-10 flows into the fourth water inlet 5-1 of the resin exchange device 5 along the four connecting pipes 9 for treatment. At the same time, a part of the effluent enters the dissolved air tank 4-5 through the reflux pump 4-15;Multiple resin exchange devices 5 are operated in series, and wastewater enters the second water distribution pipe 5-2 from the fourth water inlet 5-1 at the top of the resin exchange device 5 for water distribution. A top filter plate 5-3 and a bottom filter plate 5-4 are provided inside the resin exchange device 5. A third filter head 5-5 is provided on the top filter plate 5-3 and the bottom filter plate 5-4. A regeneration liquid inlet 5-6 is provided in the middle of the device and is connected to the second central pipe 5-7 inside. Resin 5-8 is filled between the top filter plate 5-3 and the bottom filter plate 5-4. The resin 5-8 is Na type. Wastewater enters the interior of the resin exchange device 5 at a set flow rate, passes through the resin 5-8 from top to bottom, and is filtered out by the third filter head 5-5 on the bottom filter plate 5-4. The water is collected through the fifth water outlet 5-10 and enters the next-stage resin exchange device 5. When the resin 5-8 reaches adsorption saturation, it needs to be backwashed and regenerated. The backwash water enters through the fifth water outlet 5-10 at the bottom, backwashes upward from the bottom of the third filter head 5-5, flushing out the clogged resin 5-8. It is then discharged through the backwash liquid outlet 5-9 for unified treatment. The regeneration liquid includes hydrochloric acid, sodium hydroxide, and pure water. First, hydrochloric acid is used for desorption. After discharge, the resin is washed with pure water until neutral. Then, the resin is soaked in sodium hydroxide solution. Finally, pure water is used to continue washing the resin until neutral. The regeneration liquid is also discharged through the backwash liquid outlet 5-9 for unified treatment. The operation and backwash or regeneration process of each stage of the resin exchange device 5 are consistent.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coupled device for the coordinated deep treatment of multiple pollutants in high-salinity wastewater, comprising a coagulation and sedimentation device (1), an electrocatalytic oxidation device (2), an activated carbon adsorption device (3), a coagulation and flotation device (4) and a resin exchange device (5), characterized in that: The coagulation sedimentation device (1) is provided with a first dosing tank (1-1) and a sedimentation tank (1-5) inside, the first dosing tank (1-1) is provided with a water inlet pipe (1-2) inside, the sedimentation tank (1-5) is provided with a first central tube (1-3) inside, the bottom end of the central tube (1-3) is provided with a water outlet hole (1-4), the surface of the sedimentation tank (1-5) is provided with a water outlet tank (1-6), the bottom surface of the water outlet tank (1-6) is provided with a first water outlet (1-7), the electrocatalytic oxidation device (2) is provided with an electrolytic cell (2-1) inside, the bottom surface of the electrolytic cell (2-1) is provided with a first water inlet (2-2), the electrolytic cell (2-1) is provided with an electrode plate (2-3) inside, the electrode plate (2-3) is provided A flow channel (2-4) is provided between the plates (2-3), a terminal (2-5) is provided on the surface of the electrode plate (2-3), a DC power supply (2-6) is provided on the top surface of the electrolytic cell (2-1), a second water outlet (2-7) is provided on the top surface of the electrolytic cell (2-1), an adsorption tank (3-1) is provided inside the activated carbon adsorption device (3), a second water inlet (3-2) is provided on the top surface of the adsorption tank (3-1), a first step water pipe (3-3) is fixedly installed at the bottom end of the second water inlet (3-2), a filter plate (3-4) is fixedly installed inside the adsorption tank (3-1), a first filter head (3-5) is provided on the surface of the filter plate (3-4), and an active A carbon layer (3-7) is provided, a third water outlet (3-10) is provided on the bottom surface of the adsorption tank (3-1), an air flotation tank (4-1) and a second dosing tank (4-2) are provided inside the coagulation flotation device (4), a third water inlet (4-3) is provided on the top surface of the second dosing tank (4-2), a dissolved air releaser (4-4) is provided inside the air flotation tank (4-1), an air dissolved tank (4-5) is provided on the outer surface of the air flotation tank (4-1), a scraper (4-6) is provided on the top surface of the air flotation tank (4-1), a slag collector (4-7) is provided inside the air flotation tank (4-1), a slag discharge port (4-8) is provided on the surface of the slag collector (4-7), a partition (4-1) is provided inside the air flotation tank (4-1), and a carbon layer (3-7) is provided. -9), a second filter head (4-10) is provided on the surface of the partition (4-9), and a filler 1 (4-11) and a filler 2 (4-12) are filled above the second filter head (4-10), a fourth water outlet (4-13) is provided on the bottom surface of the flotation tank (4-1), a return pipe (4-14) is fixedly installed on the surface of the fourth water outlet (4-13), and a return pump (4-15) is provided on the surface of the return pipe (4-14), a fourth water inlet (5-1) is provided on the top surface of the resin exchange device (5), a second water pipe (5-2) is fixedly installed on the bottom surface of the fourth water inlet (5-1), and a top filter plate (5-3) and a bottom filter plate (5-4) are provided inside the resin exchange device (5),A third filter head (5-5) is provided on the surface of the top filter plate (5-3) and the bottom filter plate (5-4), a regeneration liquid inlet (5-6) is provided on the surface of the resin exchange device (5), a second central tube (5-7) is provided inside the resin exchange device (5), resin (5-8) is provided inside the resin exchange device (5), a backwash liquid outlet (5-9) is fixedly installed on the surface of the resin exchange device (5), and a fifth water outlet (5-10) is provided on the bottom surface of the resin exchange device (5).

2. The device for the coordinated deep treatment of multiple pollutants in high-salt wastewater according to claim 1 is characterized in that: A first connecting pipe (6) is fixedly mounted on the surface of the first water outlet (1-7), and the other end of the first connecting pipe (6) is fixedly connected to the first water inlet (2-2).

3. The device for the coordinated deep treatment of multiple pollutants in high-salt wastewater according to claim 1 is characterized in that: A second connecting pipe (7) is fixedly mounted on the surface of the second water outlet (2-7), and the other end of the second connecting pipe (7) is fixedly connected to the second water inlet (3-2).

4. The device for the coordinated deep treatment of multiple pollutants in high-salt wastewater according to claim 3 is characterized in that: A pH meter (10), an acid adding tube (11) and an alkali adding tube (12) are provided on the surface of the second connecting tube (7).

5. The device for the coordinated deep treatment of multiple pollutants in high-salt wastewater according to claim 1 is characterized in that: A third connecting pipe (8) is fixedly mounted on the surface of the third water outlet (3-10), and the other end of the third connecting pipe (8) is fixedly connected to the third water inlet (4-3).

6. The device for the coordinated deep treatment of multiple pollutants in high-salt wastewater according to claim 1, characterized in that: A fourth connecting pipe (9) is fixedly mounted on the surface of the fourth water outlet (4-13), and the other end of the fourth connecting pipe (9) is fixedly connected to the fourth water inlet (5-1).

7. The device for the coordinated deep treatment of multiple pollutants in high-salt wastewater according to claim 1, characterized in that: The electrode plates (2-3) are provided with cathode and anode electrodes, and the electrode plates (2-3) are arranged alternately.

8. The device for the coordinated deep treatment of multiple pollutants in high-salt wastewater according to claim 1, characterized in that: A supporting foot (3-6) is fixedly mounted on the bottom surface of the filter plate (3-4), an inlet 1 (3-8) and an inlet 2 (3-9) are provided on the surface of the adsorption tank (3-1), and the supporting foot (3-6) is fixedly connected to the adsorption tank (3-1).

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