Electrode plate for electro-adsorption and desalting device

Abstract

The utility model relates to the technical field of water treatment, and provides an electrode plate for electro-adsorption and a desalting device.The electrode plate comprises a metal base plate, metal wire mesh corrugated filler and a metal grating barrel, one end of the metal grating barrel is provided with an opening, the metal base plate is arranged in the metal grating barrel, and the metal wire mesh corrugated filler is arranged in the metal grating barrel; the metal wire mesh corrugated packing is arranged in the metal grating cylinder and located on the two sides of the metal base plate. The metal wire mesh corrugated packing is applied to the field of electro-adsorption desalination, belongs to regular packing, can be customized and processed according to requirements, is directly stacked in metal grating cylinders on two sides of a metal substrate, is conductive through contact, does not need welding, and has the characteristics of small water flow resistance, large specific surface area, large adsorption capacity and convenience in replacement.

Description

Technical Field

[0001] The present application belongs to the technical field of electrosorption desalination, and more specifically, to an electrode plate for electrosorption. Background Art

[0002] Circulating cooling water is a major water user in industrial enterprises. Increasing the concentration factor of circulating water can significantly reduce the amount of wastewater discharged from circulating water and reduce the amount of make-up water. See Table 1 for details.

[0003] Table 1 Relationship between circulating water concentration multiple and replenishment water volume

[0004]

[0005] As can be seen from Table 1, when the concentration ratio of circulating water is increased to more than 6.0, the water-saving effect gradually decreases, and the scaling risk of the water-cooled heat exchanger will also increase. Therefore, in order to further increase the reuse rate of industrial water, it can only be achieved through sewage reuse. Commonly used methods include ion exchange, multi-effect evaporation, electrodialysis, reverse osmosis, etc., but there are also problems such as high energy consumption, high cost, and membrane pollution. As a new water desalination technology, capacitive desalination (CDI) has the characteristics of low energy consumption and no pollution, and has broad development prospects.

[0006] The electrosorption desalination technology uses a direct current voltage to form an electrostatic field. When sewage flows through the electrode plates, the charged particles in the water migrate to the electrode plates with opposite charges, are adsorbed on the surface of the electrode plates and are enriched and concentrated, ultimately achieving the separation of charged salts and colloidal particles from water, thereby obtaining recycled water with the salt removed. After the electrode plates are saturated with adsorption, the positive and negative plates are short-circuited to discharge. At this time, the adsorbed ions fall off the surface of the electrode plates and are released back into the water. After this part of the concentrated water is drained, the next adsorption cycle can be carried out. However, since conventional electrode plates are mostly made of titanium and the surface is coated with rare metals such as gallium, iridium, and ruthenium, the electrode plate processing cost is relatively high, and the adsorption capacity of the electrode plates is low, which directly affects the adsorption desalination rate and water production. Therefore, the electrode plate is the core component of the electrosorption technology and is also a key factor restricting the promotion and application of electrosorption technology. Utility Model Content

[0007] The purpose of the embodiments of the present application is to provide an electrode plate for electric adsorption to solve the technical problems of high manufacturing cost and low adsorption capacity of the electrode plate in the prior art.

[0008] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an electrode plate for electric adsorption, the electrode plate comprising: a metal substrate, a metal wire mesh corrugated filler and a metal grid tube, one end of the metal grid tube is provided with an opening, the metal substrate is arranged in the metal grid tube, the metal wire mesh corrugated filler is arranged in the metal grid tube and is located on both sides of the metal substrate.

[0009] In one embodiment, the metal substrate, the metal wire mesh corrugated filler and the metal grid cylinder are all made of stainless steel or copper.

[0010] In one embodiment, the thickness of the wire mesh corrugated packing is 10-40 mm.

[0011] Another object of the present application is to provide a desalination device for electrosorption, comprising: a non-metallic water tank, a raw water inlet pipe, a raw water outlet pipe, an online conductivity meter and an electrosorption unit, wherein the electrosorption unit is arranged in the non-metallic water tank, and the electrosorption unit comprises at least two electrode plates, each of which is arranged at intervals, and each of the electrode plates is connected to a stabilized DC power supply; the online conductivity meter is respectively provided at the raw water inlet pipe and the raw water outlet pipe.

[0012] In one embodiment, two adjacent electrode plates are spaced apart and separated by an insulating member, and the length of the insulating member is 3-8 mm.

[0013] In one embodiment, a mounting through hole is provided in the middle of each electrode plate, and each electrode plate is sleeved on a tetrafluoroethylene screw through the mounting through hole, and tetrafluoroethylene nuts are screwed on both ends of the tetrafluoroethylene screw, and the insulating member is sleeved on the tetrafluoroethylene screw and located between the two electrode plates.

[0014] In one embodiment, a non-metallic sieve plate is provided in the non-metallic water tank, and the non-metallic sieve plate is located between the raw water inlet pipe and the electrode plate closest thereto.

[0015] In one embodiment, a backwash water inlet pipe and a backwash drain pipe are provided in the non-metallic water tank.

[0016] In one embodiment, the voltage of the voltage-regulated DC power supply is 1.0-5.0V, and the hourly flow rate of raw water in the raw water inlet pipe is 20%-80% of the volume of the non-metallic water tank.

[0017] In one embodiment, the electrode plates serving as anodes and the electrode plates serving as cathodes are arranged alternately.

[0018] The electrode plate and desalination device for electrosorption provided in the present application have the following beneficial effects: compared with the prior art, the present application applies metal wire mesh corrugated filler to the field of electrosorption desalination. The metal wire mesh corrugated filler is a regular filler that can be customized as required and directly stacked in the metal grid tube on both sides of the metal substrate. It conducts electricity through contact without welding and has the characteristics of small water flow resistance, large specific surface area, large adsorption capacity and easy replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the layout structure of the electrosorption desalination device provided in the embodiment of the present application;

[0021] Figure 2 A schematic diagram of the planar structure of the electrode plate for electroadsorption provided in an embodiment of the present application.

[0022] Among them, the reference numerals in the figure are:

[0023] 1. Electrode plate; 11. Metal substrate; 12. Metal wire mesh corrugated packing; 13. Metal grille tube; 14. Mounting through hole; 15. Wiring ear; 2. Non-metal water tank; 21. Non-metal sieve plate; 22. Backwash inlet pipe; 23. Backwash drain pipe; 3. Raw water inlet pipe; 4. Raw water outlet pipe; 5. Online conductivity meter; 6. Regulated DC power supply; 7. Insulating parts; 8. Teflon screw; 81. Teflon nut. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] like Figure 1-Figure 2 As shown, an electrosorption desalination device provided in an embodiment of the present application is now described. The electrosorption desalination device comprises: a non-metallic water tank 2, a raw water inlet pipe 3, a raw water outlet pipe 4, an online conductivity meter 5 and an electrosorption unit; the raw water inlet pipe 3 is arranged at the lower part of one side of the non-metallic water tank 2 for the raw water to be treated to enter, and the raw water outlet pipe 4 is arranged at the upper part of the other side of the non-metallic water tank 2 for the treated raw water to be discharged. The electrosorption unit is arranged in the non-metallic water tank 2, and is used for electrosorption treatment of the raw water; the electrosorption unit comprises at least two electrode plates 1, one is an anode and the other is a cathode; Figure 1 Four electrode plates 1 are provided; each electrode plate 1 is arranged at intervals, and each electrode plate 1 is connected to a stabilized DC power supply 6; an online conductivity meter 5 is provided at a raw water inlet pipe 3 and a raw water outlet pipe 4, respectively, and the two online conductivity meters 5 are used to perform online detection on the raw water and the treated raw water, respectively, to determine the electrosorption effect of the electrosorption unit.

[0029] In this embodiment, the electrode plate 1 includes: a metal substrate 11, a metal wire mesh corrugated packing 12 and a metal grid tube 13. The metal grid tube 13 is a rectangular cylinder structure with an opening at one end. The metal substrate 11 is arranged in the metal grid tube 13. The metal substrate 11 is provided with a wiring ear 15 for connecting the positive or negative electrode of the voltage-stabilized DC power supply 6. The metal wire mesh corrugated packing 12 is arranged in the metal grid tube 13 and is located on both sides of the metal substrate 11. By applying the metal wire mesh corrugated packing 12 to the field of electrosorption desalination, the metal wire mesh corrugated packing 12 belongs to a regular packing, which can be customized and processed as required, and directly stacked in the metal grid tube 13 on both sides of the metal substrate 11. It conducts electricity through contact without welding, and has the characteristics of small water flow resistance, large specific surface area, large adsorption capacity, and easy replacement.

[0030] In this embodiment, the metal substrate 11, the metal wire mesh corrugated filler 12 and the metal grid tube 13 are all made of stainless steel or copper. The stainless steel can be 306 stainless steel or 316 stainless steel.

[0031] In this embodiment, the thickness of the wire mesh corrugated filler 12 is 10-40 mm, preferably 20-30 mm.

[0032] In this embodiment, two adjacent electrode plates 1 are spaced apart and separated by an insulating member 7, and the length of the insulating member 7 is 3-8 mm. The insulating member 7 is a tubular structure.

[0033] In this embodiment, a mounting through hole 14 is provided in the middle of each electrode plate 1, and at least two mounting through holes 14 are arranged at intervals. Each electrode plate 1 is sleeved on the tetrafluoroethylene screw 8 through the mounting through hole 14, and tetrafluoroethylene nuts 81 are screwed on both ends of the tetrafluoroethylene screw 8. The insulating member 7 is sleeved on the tetrafluoroethylene screw 8 and is located between the two electrode plates 1. In this way, the tetrafluoroethylene screw 8 and the insulating member 7 can be used to install multiple electrode plates 1 at intervals in the non-metallic water tank 2.

[0034] In this embodiment, a non-metallic mesh plate 21 is provided in the non-metallic water tank 2, and the non-metallic mesh plate 21 is located between the raw water inlet pipe 3 and the electrode plate 1 closest thereto. The non-metallic mesh plate 21 is to reduce the flow rate of the raw water and prevent the raw water from directly impacting the electrode plate 1.

[0035] In this embodiment, a backwash water inlet pipe 22 and a backwash water outlet pipe 23 are provided in the non-metallic water tank 2 for cleaning the electrode plate 1 and the non-metallic water tank 2 .

[0036] In this embodiment, the voltage of the stabilized DC power supply 6 is 1.0-5.0V, preferably 2.0-3.0V; the hourly flow rate of raw water in the raw water inlet pipe 3 is 20%-80% of the volume of the non-metallic water tank 2, preferably 40-60%.

[0037] In this embodiment, the electrode plates 1 serving as anodes and the electrode plates 1 serving as cathodes are arranged alternately.

[0038] Working process: After the voltage-stabilized DC power supply 6 supplies power, the electrode plate 1 is respectively charged with positive and negative electricity, and the raw water flows in from the raw water inlet pipe 3 at the bottom of the side of the non-metallic water tank 2, passes through the non-metallic sieve plate 21, and slowly flows through the channel formed by the electrode plate 1. The ions and charged particles in the raw water move toward the electrode plate 1 of opposite charge in the electric field, and are then adsorbed on the electrode plate 1 and stored in the double electric field. The water that has been adsorbed and desalted by the electric field flows out from the raw water outlet pipe 4 at the top of the non-metallic water tank 2. As the number of adsorbed ions increases, the conductivity of the effluent after the electro-adsorption treatment gradually increases. When the effluent conductivity is 80% of the inlet conductivity, it means that the adsorption capacity of the electrode plate 1 is saturated. At this time, the raw water inlet pipe 3 and the raw water outlet pipe 4 are closed, the voltage-stabilized DC power supply 6 of the electrode plate 1 is disconnected, the electrode plate 1 connection ear 15 is short-circuited with a wire, and the backwash drain pipe 23 and the backwash inlet pipe 22 are opened. Since the electric field between the electrode plates 1 is eliminated, the ions stored in the double electric field return to the channel again and are discharged with the water flow, and the electrode plate 1 is also regenerated. Thus, the purpose of continuous operation, simple regeneration, and efficient desalination is achieved.

[0039] In a specific embodiment 1, the metal substrate 11, the metal wire mesh filler and the metal grid are all made of 304 stainless steel, the voltage-regulated DC power supply 6 is set to 2V, the thickness of the metal wire mesh filler is 40mm, the channel width between the electrode plates 1 is 2mm, the hourly flow rate of raw water is 20% of the volume of the non-metallic water tank 2, and the desalination rate of the water after electro-adsorption treatment is 45.0%.

[0040] In a specific embodiment 2, the metal substrate 11, the metal mesh filler and the metal grid are all made of 316L stainless steel, the voltage-regulated DC power supply 6 is set to 5V, the thickness of the metal mesh filler is 10mm, the channel width between the electrode plates 1 is 6mm, the hourly flow rate of raw water is 40% of the volume of the non-metallic water tank 2, and the desalination rate of the water after electro-adsorption treatment is 36.2%.

[0041] In a specific embodiment 3, the metal substrate 11, the metal mesh filler and the metal grid are all made of copper, the regulated DC power supply 6 is set to 3V, the thickness of the metal mesh filler is 30mm, the channel width between the electrode plates 1 is 4mm, the hourly flow rate of raw water is 60% of the volume of the non-metallic water tank 2, and the desalination rate of the water after electro-adsorption treatment is 39.5%.

[0042] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electrode plate for electrosorption, characterized in that: The electrode plate (1) comprises: a metal substrate (11), a metal wire mesh corrugated filler (12) and a metal grid tube (13); one end of the metal grid tube (13) is provided with an opening; the metal substrate (11) is arranged in the metal grid tube (13); the metal wire mesh corrugated filler (12) is arranged in the metal grid tube (13) and is located on both sides of the metal substrate (11).

2. The electrode plate for electrosorption according to claim 1, characterized in that: The metal base plate (11), the metal wire mesh corrugated filler (12) and the metal grid tube (13) are all made of stainless steel or copper.

3. The electrode plate for electrosorption according to claim 1 or 2, characterized in that: The thickness of the metal wire mesh corrugated filler (12) is 10-40 mm.

4. A desalination device for electrosorption, characterized in that include: A non-metallic water tank (2), a raw water inlet pipe (3), a raw water outlet pipe (4), an online conductivity meter (5) and an electric adsorption unit, wherein the electric adsorption unit is arranged in the non-metallic water tank (2), and the electric adsorption unit comprises at least two electrode plates (1) according to any one of claims 1 to 3, each of the electrode plates (1) is arranged at intervals, and each of the electrode plates (1) is connected to a regulated DC power supply (6); the online conductivity meter (5) is respectively arranged at the raw water inlet pipe (3) and the raw water outlet pipe (4).

5. The desalination device for electrosorption according to claim 4, characterized in that: Two adjacent electrode plates (1) are spaced apart and separated by an insulating member (7), and the length of the insulating member (7) is 3-8 mm.

6. The desalination device for electrosorption according to claim 5, characterized in that: A mounting through hole (14) is provided in the middle of each electrode plate (1), and each electrode plate (1) is sleeved on a tetrafluoroethylene screw (8) through the mounting through hole (14), and tetrafluoroethylene nuts (81) are screwed on both ends of the tetrafluoroethylene screw (8), and the insulating member (7) is sleeved on the tetrafluoroethylene screw (8) and is located between the two electrode plates (1).

7. The electrosorption desalination device according to claim 6, characterized in that: A non-metallic sieve plate (21) is provided in the non-metallic water tank (2), and the non-metallic sieve plate (21) is located between the raw water inlet pipe (3) and the electrode plate (1) closest thereto.

8. The electrosorption desalination device according to claim 7, characterized in that: A backwash water inlet pipe (22) and a backwash drain pipe (23) are provided in the non-metallic water tank (2).

9. The desalination device for electrosorption according to claim 4, characterized in that: The voltage of the voltage-stabilized DC power supply (6) is 1.0-5.0V, and the hourly flow rate of raw water in the raw water inlet pipe (3) is 20%-80% of the volume of the non-metallic water tank (2).

10. The desalination device for electrosorption according to claim 4, characterized in that: The electrode plates (1) serving as anodes and the electrode plates (1) serving as cathodes are arranged alternately.

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