Capacitive deionization purification device for drainage of saline-alkali soil

Abstract

The utility model discloses a capacitive deionization purification device for saline-alkali soil drainage, which relates to the related technical field of saline-alkali soil drainage treatment and comprises a filter box, a filter mechanism is mounted in the filter box, a communicating pipe is arranged below the filter mechanism, and a capacitive deionization main body device is arranged on one side of the filter box. A drain pipe penetrates through the capacitive deionization main body device and is communicated with the communicating pipe, a photovoltaic solar panel is arranged at the top of the capacitive deionization main body device, an energy storage unit is connected to the bottom of the photovoltaic solar panel, and the energy storage unit is fixedly mounted above the capacitive deionization main body device. Impurities such as lumps and particles in water are removed through the filtering mechanism, multi-layer filtering treatment is carried out on drained water quality of the saline-alkali soil, and the water sample purification rate can be improved; and meanwhile, better efficiency and lower energy consumption are achieved, the quality of drained water of the saline-alkali soil can meet the requirements for low cost, large amount, easy obtaining and the like of irrigation water in arid region agricultural production after being purified, and the agricultural irrigation cost of the arid region is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of saline-alkali land drainage treatment, and in particular to a capacitor deionization purification device for saline-alkali land drainage. Background Technology

[0002] The wastewater from saline-alkali land is characterized by high salt content, high mineralization, and an alkaline pH. Direct discharge without treatment can cause serious pollution to the surrounding environment. Current treatment technologies for saline-alkali land wastewater mainly include reverse osmosis, electrodialysis, and distillation, but these methods suffer from problems such as complex equipment, high energy consumption, and the potential for secondary pollution. Capacitive deionization (CDI), as a novel water treatment technology, offers advantages such as environmental friendliness, low cost, low energy consumption, and high efficiency. Based on the double-layer adsorption theory, this technology uses an external voltage to create an electrostatic field, driving ions in the solution to migrate and adsorb onto the surface of the electrode material, thereby achieving highly efficient ion removal.

[0003] However, in the actual treatment of saline-alkali land drainage, a large number of particulate impurities are present. In traditional capacitive deionization devices, these particulate impurities easily clog the electrode pores, hindering ion migration and resulting in a significant reduction in adsorption efficiency, thus affecting the purification effect. In addition, the electrode materials of traditional capacitive deionization devices have high manufacturing costs, low output, and limited adsorption capacity, and often require large energy consumption during operation, which seriously restricts their desalination efficiency and economic viability.

[0004] Therefore, this utility model provides a capacitor deionization purification device for drainage of saline-alkali land to solve the problems existing in the prior art. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a capacitive deionization purification device for drainage of saline-alkali land, including a filter box, a filter mechanism installed inside the filter box, a connecting pipe below the filter mechanism, a capacitive deionization main body device on one side of the filter box, a drain pipe passing through the capacitive deionization main body device, the drain pipe being connected to the connecting pipe, a photovoltaic solar panel on the top of the capacitive deionization main body device, an energy storage unit connected to the bottom of the photovoltaic solar panel, and the energy storage unit being fixedly installed above the capacitive deionization main body device.

[0006] Optionally, the filtration mechanism includes three layers of filter sleeves of different specifications, and the filter sleeves are fixedly connected to the inner wall of the filter box.

[0007] Optionally, the inner wall of the filter box is provided with a reinforcing layer, and a V-shaped baffle for collecting the filtered water is provided at the reinforcing layer, with the opening of the V-shaped baffle connected to the connecting pipe.

[0008] Optionally, the capacitive deionization main device includes a processing box, the top of which is detachably connected to a mounting plate. The top surface of the mounting plate is provided with terminals, and the bottom surface of the mounting plate is provided with several sets of electrode assemblies. Each electrode assembly includes a positive electrode, a negative electrode, and a conductive base. The surface of the conductive base has several evenly distributed insertion slots. The positive and negative electrodes are staggered from left to right and are respectively inserted into the insertion slots. A conductive sheet is fixedly connected in the insertion slot. The surface of the conductive sheet is provided with a raised contact piece, which contacts the positive or negative electrode. The surfaces of the positive and negative electrodes are coated with a polypyrrole-modified biochar layer. An insulating liner is fixedly connected to the inner wall of the processing box.

[0009] Optionally, a water inlet pipe is fixedly connected to the upper surface of the filter box, and valve bodies are fixedly connected to the surfaces of the water inlet pipe and the drain pipe. Several vents are provided on the top surface of the filter box.

[0010] Optionally, a buffer sleeve is fixedly installed at the end of the connecting pipe. The buffer sleeve contains an impact ball and a buffer mesh plate fixed to the connecting frame. The buffer mesh plate includes a circular frame, in which a filter screen is installed. Several inserts are arranged circumferentially on the circular frame.

[0011] Optionally, the bottom surface of the energy storage unit is connected to the capacitor deionization body device via a support column.

[0012] Optionally, the energy storage unit includes a DC power supply and a battery, wherein the battery is used to store the electrical energy converted by the photovoltaic solar panel, and the DC power supply is connected to the battery.

[0013] The present invention discloses the following technical effects:

[0014] 1. By removing solid impurities such as lumps and particles from the water through the filtration mechanism, the water quality of the drainage water from saline-alkali land is filtered in multiple stages, which helps to improve the water purification rate.

[0015] 2. The arid Northwest region is rich in solar and thermal resources. Photovoltaic solar panels and energy storage units can provide cleaner, more stable and reliable energy drive for the capacitor deionization main unit, while significantly reducing the energy consumption of the entire unit.

[0016] 3. The modified biochar layer is made from corn stalks, an agricultural waste, which is cheap and readily available. By modifying it with polypyrrole, nitrogen functional groups are introduced, which gives it a high specific surface area and porosity. At the same time, it improves its electrochemical performance and has excellent conductivity. It has the advantages of low cost and recycling of waste resources.

[0017] 4. After purification, the drainage water from saline-alkali land can meet the requirements of arid agricultural production for cheap, large-volume, and easily accessible irrigation water, thus reducing the cost of irrigation in arid areas. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the end face of the capacitor deionization treatment device of this utility model;

[0021] Figure 3 This is a schematic diagram of the electrode assembly of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the filter screen of this utility model;

[0023] In the diagram: 1. Inlet pipe; 2. Filter box; 3. Exhaust port; 4. Photovoltaic solar panel; 5. Energy storage unit; 6. Capacitor deionization main unit; 7. Drain pipe; 8. Support column; 9. Filter sleeve; 10. Reinforcing layer; 11. Connecting pipe; 12. Buffer shell; 13. Impact ball; 14. Battery; 15. Terminal block; 16. Mounting plate; 17. Conductive base; 18. Insulating liner; 19. Conductive sheet; 20. Polypyrrole modified biochar layer; 21. Circular frame; 22. Filter screen; 23. Insert block; 24. DC power supply. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figures 1-4As shown, this embodiment provides a capacitor deionization purification device for drainage of saline-alkali land, including a filter box 2, a filter mechanism installed inside the filter box 2, a connecting pipe 11 below the filter mechanism, a capacitor deionization main unit 6 on one side of the filter box 2, a drain pipe 7 passing through the capacitor deionization main unit 6, the drain pipe 7 being connected to the connecting pipe 11, a photovoltaic solar panel 4 on the top of the capacitor deionization main unit 6, an energy storage unit 5 connected to the bottom of the photovoltaic solar panel 4, and the energy storage unit 5 being fixedly installed above the capacitor deionization main unit 6. This invention removes solid impurities such as lumps and particles from water through a filtration mechanism, performing multi-level filtration treatment on the drainage water from saline-alkali land, which helps to improve the water purification rate. The arid Northwest region is rich in light and heat resources. The photovoltaic solar panels 4 and energy storage unit 5 can provide cleaner, more stable and reliable energy drive for the capacitor deionization main device 6, while significantly reducing the energy consumption of the entire device. It also has better efficiency and lower energy consumption. After purification, the drainage water from saline-alkali land can meet the requirements of arid agricultural production for cheap, large-volume and easily accessible irrigation water, reducing the cost of agricultural irrigation in arid areas.

[0027] Furthermore, an angle adjustment device is installed below the photovoltaic solar panel 4 to obtain the optimal illumination angle. The angle adjustment device is fixedly installed on the mounting frame, and the output end of the angle adjustment device is hinged to the bracket. The photovoltaic solar panel 4 is installed on the bracket, and the photovoltaic solar panel 4 is a monocrystalline silicon solar photovoltaic panel.

[0028] The design is further optimized so that the filtration mechanism includes three layers of filter plates 9 of different specifications, which are fixedly connected to the inner wall of the filter box 2. Drainage from saline-alkali land enters the filter box 2 and is guided to the filter plates 9 for multi-layer filtration. The filtered drainage is then discharged through the connecting pipe 11. The filter material of the filter plates 9 is activated carbon filter plates or other materials that filter particles in the drainage from saline-alkali land, and all are porous materials to achieve the filtration and separation of fixed particles from the drainage water.

[0029] The design is further optimized by installing a reinforcement layer 10 on the inner wall of the filter box 2. A V-shaped baffle is installed at the reinforcement layer 10 to collect the filtered water. The opening of the V-shaped baffle is connected to the connecting pipe 11.

[0030] Furthermore, a closed door is movably connected to the inner wall of the filter box 2, which facilitates the complete removal and cleaning of the filter sleeve 9 by opening the closed door.

[0031] Further optimizing the design, the capacitive deionization main unit 6 includes a processing box. A mounting plate 16 is detachably connected to the top of the processing box. The top surface of the mounting plate 16 has terminals 15, and the bottom surface has several sets of electrode assemblies. Each electrode assembly includes a positive electrode, a negative electrode, and a conductive base 17. The surface of the conductive base 17 has several evenly distributed insertion slots. The positive and negative electrodes are staggered from left to right and are respectively inserted into the insertion slots. A conductive sheet 19 is fixedly connected within the insertion slot. The surface of the conductive sheet 19 has raised contact pieces that contact the positive or negative electrode. The surfaces of the positive and negative electrodes are coated with a polypyrrole-modified biochar layer 20. An insulating liner 18 is fixedly connected to the inner wall of the processing box. The insulating liner 18 effectively prevents the surface of the capacitive deionization main unit 6 from becoming charged, improving the safety of the processing. The mounting plate 16 improves the stability of the connection and facilitates disassembly and maintenance.

[0032] Further optimization of the scheme: the upper surface of the filter box 2 is fixedly connected to the water inlet pipe 1, the surfaces of the water inlet pipe 1 and the drain pipe 7 are fixedly connected to the valve body, and the top surface of the filter box 2 is provided with several exhaust ports 3.

[0033] In a further optimized design, a buffer sleeve 12 is fixedly installed at the end of the connecting pipe 11. Inside the buffer sleeve 12 are impact balls 13 and a buffer screen plate fixed to the connecting frame. The buffer screen plate includes a circular frame 21, within which a filter screen 22 is installed. Several insert blocks 23 are arranged circumferentially around the circular frame 21. Drainage from the saline-alkali land flows through the connecting pipe 11 into the buffer sleeve 12. After initial buffering by the impact balls 13 within the buffer sleeve 12, the drainage impacts the filter screen 22, thus buffering the flow of saline-alkali land drainage.

[0034] The design was further optimized so that the bottom of the energy storage unit 5 was connected to the capacitor deionization main unit 6 via the support column 8.

[0035] In a further optimized design, the energy storage unit 5 includes a DC power supply 24 and a battery 14. The battery 14 stores the electrical energy converted from the photovoltaic solar panel 4, and the DC power supply 24 is connected to the battery 14. The DC power supply 24 is connected to the electrical load via a line to control the adsorption and regeneration of the capacitor deionization device.

[0036] Working principle:

[0037] The saline-alkali land drainage is introduced into the filter box 2 through the inlet pipe 1, and then into the filter sleeve 9 for filtration. The brackish water undergoes multi-level filtration treatment. The filtered water is then discharged into the capacitor deionization main unit 6 through the connecting pipe 11. Before entering the capacitor deionization unit, the saline-alkali land drainage first passes through the buffer sleeve 12 and then collides with the impact ball 13 to slow down the water flow speed, thus buffering the fast-flowing water. Then, it passes through the capacitor deionization unit, where the electrostatic field generated on the electrode material surface by the external DC power supply 24 causes the inorganic ions in the solution flowing between the electrodes to move towards the electrodes with opposite charges under the action of the electric field force. They are then adsorbed and removed by the double electric layer generated on the electrode surface, thereby achieving the purpose of purifying the saline-alkali land drainage. The purified water is discharged through the drain pipe 7.

[0038] The biochar raw material is made by mixing corn stalks and sodium bicarbonate in a mass ratio of 1:1. The mixture is placed in a tube furnace and purged with nitrogen for alkaline activation at a pyrolysis rate of 5℃ / min. Under high temperature conditions, the pore structure of the corn stalks is fully expanded. A certain concentration of pyrrole and ferric chloride solution is added to obtain polypyrrole-modified biochar. The modified biochar has good conductivity and high specific surface area. In the capacitor deionization device 6, it has a good desalination effect on saline-alkali land drainage. Furthermore, the self-made polypyrrole-modified biochar layer 20 gives the electrode good stability and recyclability. It also facilitates the reuse of agricultural waste and has the characteristics of being economical and having a clean process.

[0039] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 this utility model.

[0040] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A capacitor deionization purification device for drainage of saline-alkali land, characterized in that: The device includes a filter box (2), a filter mechanism installed inside the filter box (2), a connecting pipe (11) below the filter mechanism, a capacitor deionization main body device (6) on one side of the filter box (2), a drain pipe (7) passing through the capacitor deionization main body device (6), the drain pipe (7) being connected to the connecting pipe (11), a photovoltaic solar panel (4) on the top of the capacitor deionization main body device (6), an energy storage unit (5) connected to the bottom of the photovoltaic solar panel (4), and the energy storage unit (5) being fixedly installed above the capacitor deionization main body device (6).

2. The capacitor deionization purification device for saline-alkali land drainage according to claim 1, characterized in that: The filtration mechanism includes three layers of filter sleeves (9) of different specifications, and the filter sleeves (9) are fixedly connected to the inner wall of the filter box (2).

3. The capacitor deionization purification device for saline-alkali land drainage according to claim 2, characterized in that: The filter box (2) has a reinforcing layer (10) on its inner wall. A V-shaped baffle for collecting the filtered water is provided at the reinforcing layer (10). The opening of the V-shaped baffle is connected to the connecting pipe (11).

4. The capacitor deionization purification device for saline-alkali land drainage according to claim 1, characterized in that: The capacitor deionization main device (6) includes a processing box. The top of the processing box is detachably connected to a mounting plate (16). The top surface of the mounting plate (16) is provided with a terminal post (15). The bottom surface of the mounting plate (16) is provided with several sets of electrode assemblies. The electrode assembly includes a positive electrode, a negative electrode, and a conductive base (17). The surface of the conductive base (17) is provided with several evenly distributed insertion slots. The positive electrode and the negative electrode are arranged alternately from left to right. The positive electrode and the negative electrode are respectively inserted into the insertion slots. A conductive sheet (19) is fixedly connected in the insertion slot. The surface of the conductive sheet (19) is provided with a raised contact piece. The contact piece contacts the positive electrode or the negative electrode. The surfaces of the positive electrode and the negative electrode are coated with a polypyrrole modified biochar layer (20). An insulating liner (18) is fixedly connected to the inner wall of the processing box.

5. The capacitor deionization purification device for saline-alkali land drainage according to claim 1, characterized in that: The upper surface of the filter box (2) is fixedly connected to a water inlet pipe (1), and the surfaces of the water inlet pipe (1) and the drain pipe (7) are fixedly connected to valve bodies. Several exhaust ports (3) are opened on the top surface of the filter box (2).

6. The capacitor deionization purification device for saline-alkali land drainage according to claim 1, characterized in that: A buffer sleeve (12) is fixedly installed at the end of the connecting pipe (11). The buffer sleeve (12) is provided with an impact ball (13) and a buffer mesh plate fixed to the connecting frame. The buffer mesh plate includes a circular frame (21). A filter screen (22) is installed in the circular frame (21). Several inserts (23) are arranged around the circular frame (21).

7. The capacitor deionization purification device for saline-alkali land drainage according to claim 1, characterized in that: The bottom surface of the energy storage unit (5) is connected to the capacitor deionization body device (6) via a support column (8).

8. The capacitor deionization purification device for saline-alkali land drainage according to claim 1, characterized in that: The energy storage unit (5) includes a DC power supply (24) and a battery (14). The battery (14) is used to store the electrical energy converted by the photovoltaic solar panel (4). The DC power supply (24) is connected to the battery (14).

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