A capacitor deionization electrochemical treatment device

Abstract

The present invention relates to the field of wastewater treatment technology, and specifically to a capacitor deionization electrochemical treatment device. The present invention sets a multi-stage electrode module on a support member on one side of the shell of the device body, and water is introduced by spraying; an electrode actuator is also provided, and the electrode actuator is installed on the support member. A detachable bottom plate is provided at the bottom of the shell, and the electrode actuator can transfer the outer electrode module from the top of the device body to the inside. The present invention controls the replacement of the electrode module intelligently through the electrode actuator, and adopts the spraying method to introduce water. The contact area between the sewage and the electrode module is increased through the "snake-shaped" water flow path, which solves the problem of poor pollutant removal effect of the electric adsorption device.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a capacitor deionization electrochemical treatment device. Background Art

[0002] Capacitive deionization (CDI) is an efficient, low-cost, and non-secondary pollution electrosorption technology that can be used to remove and enrich low-concentration ions to achieve resource recycling. Capacitive deionization technology uses electrostatic adsorption to enrich the ion components in the water on both sides of the positive and negative electrodes, thereby achieving the purpose of removing salt from the water. Although the market prospects in seawater desalination, groundwater remediation, industrial and agricultural water reuse, and domestic water desalination have always been promising, there are few large-scale application projects due to its high cost compared to RO. With the breakthroughs in electrode material research in recent years and the popularization of supercapacitor technology, the cost and desalination efficiency of CDI products have been greatly optimized.

[0003] The patent with application number CN201621037917.X (application date 2016-09-05) discloses a capacitive deionization device, including a rectangular trough, an electrode plate, a partition, a granular electrode and a liquid distribution plate, wherein the rectangular trough is provided with a plurality of slots, the electrode plate and the partition are isolated from each other and arranged in the slots, the granular electrode is arranged between the electrode plate and the partition, the liquid distribution plate is arranged between the bottom of the rectangular trough and the electrode plate and the partition, the liquid distribution plate is provided with a water permeable hole, a first space is formed between the lower part of the water permeable hole and the bottom of the rectangular trough, a liquid inlet is provided at the bottom of the rectangular trough, and a liquid discharge port is provided at the upper part of the rectangular trough. The invention has a large aspect ratio, high time-space yield, small footprint and simple assembly and disassembly of the device. However, the device has a long electrode replacement time, large liquid flow resistance, and still has the problem of unsatisfactory pollutant removal effect. Summary of the invention

[0004] 1. Problem to be solved

[0005] In order to solve the problem of poor removal effect of the electric adsorption device in the prior art, the present invention discloses a capacitor deionization electrochemical treatment device, which arranges a multi-stage electrode module on a support on one side of the device body shell, intelligently controls the replacement of the electrode module through an electrode actuator, and adopts a spraying method to introduce water. The "snake-shaped" water flow path increases the contact area between the sewage and the electrode module, thereby solving the problem of poor pollutant removal effect of the electric adsorption device.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0008] The present invention provides a capacitor deionization electrochemical treatment device, comprising a device body, an electrode module, an electrode slot and a water inlet, wherein the water inlet is provided with a spray water inlet head and is arranged above the device body; the device body comprises a shell and a support member, wherein the support member is arranged on one side of the shell, the support member is provided with an electrode slot, and the electrode module is detachably arranged on the support member through the electrode slot.

[0009] Preferably, a bottom plate is detachably provided on the bottom of the housing.

[0010] Preferably, it also includes an electrode driver, which is arranged on the support; the electrode driver includes a transmission belt and a driving device, and the driving device is arranged between the support and the transmission belt; the transmission belt is provided with an electrode slot, and the electrode module is arranged on the transmission belt through the electrode slot.

[0011] Preferably, the electrode slot is a magnetic slot.

[0012] Preferably, the electrode module comprises an anode module and a cathode module, and the anode module and the cathode module are arranged in parallel.

[0013] Preferably, sealing rings are provided around the anode module and the cathode module.

[0014] Preferably, the anode module includes an anode support plate, an anode electrode plate and an anode water inlet hole, the anode water inlet hole is arranged in the middle of the anode electrode plate, and the anode electrode plate is arranged on the anode support plate; the cathode module includes a cathode support plate, a cathode electrode plate and a cathode water outlet hole, and the cathode electrode plate and the cathode water outlet hole are arranged on the cathode support plate.

[0015] Preferably, the width of the sealing ring is L, the diameter of the anode module is D1, and the diameter of the cathode module is D2, then D1=D2>35L.

[0016] Preferably, the area of ​​the anode water inlet hole is equal to the sum of the areas of the cathode water outlet holes.

[0017] Preferably, the diameter of the anode module is D1, the inner diameter of the anode water inlet hole is D4, and D4:D1=1:5-1:9.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) A capacitor deionization electrochemical treatment device of the present invention includes a device body, an electrode module, an electrode slot and a water inlet, and adopts a spraying water inlet method. The spraying method can reduce the impact of water flow on the electrode module, and the sprayed water will be sprayed to the edge of the first electrode module. The water flows from the edge to the center, which can play a role in slowing down the flow rate of the water flow; the spraying process can also play a role in aeration, oxidizing a part of the organic matter, thereby solving the problem of poor pollutant removal effect of the electric adsorption device.

[0021] (2) A capacitor deionization electrochemical treatment device of the present invention also includes an electrode actuator, which is installed on a support member. A detachable bottom plate is provided at the bottom of the shell. The electrode actuator can transfer the outer electrode module from the top of the device body to the inside, thereby accelerating the replacement speed of the electrode module and improving the wastewater treatment rate. At the same time, the bottom plate is opened, and the internal electrode module is transferred from the bottom of the device body to the outside, realizing automated operation and greatly improving the intelligence of the device.

[0022] (3) In a capacitor deionization electrochemical treatment device of the present invention, the electrode module adopts a water inlet and outlet method in which water enters the middle of the anode support plate and water exits around the cathode support plate, thereby extending the residence time of wastewater in the electrode module and improving the efficiency of electrosorption treatment.

[0023] (4) In a capacitor deionization electrochemical treatment device of the present invention, the diameters of the anode and cathode support plates are the same and slightly smaller than the inner diameter of the device body, and a sealing ring is provided around the support plate to prevent spray water from leaking from the gap between the electrode support plate and the device body.

[0024] (5) In a capacitive deionization electrochemical treatment device of the present invention, the area of ​​the anode water inlet hole is equal to the sum of the areas of the cathode water outlet holes, so that the water inlet volume is equivalent to the water outlet volume, thereby optimizing the water inlet and outlet efficiency of the device to the greatest extent and improving the electro-adsorption treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 is a top view of the present invention;

[0027] Figure 3 1 is a schematic diagram of the electrode slot installation of the present invention (I);

[0028] Figure 4 This is a schematic diagram (II) of the electrode slot installation of the present invention.

[0029] in:

[0030] 100. Device body; 110. Shell; 120. Support member; 130. Bottom plate; 200. Electrode module; 210. Anode module; 211. Anode support plate; 212. Anode electrode plate; 213. Anode water inlet hole; 214. Anode sealing ring; 220. Cathode module; 221. Cathode support plate; 222. Cathode electrode plate; 223. Cathode water outlet hole; 224. Cathode sealing ring; 300. Electrode slot; 400. Water inlet; 500. Electrode actuator; 510. Transmission belt; 520. Driving device. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with specific exemplary embodiments. However, it should be understood that various modifications and variations can be made without departing from the scope of the present invention as defined by the appended claims. The detailed description and the accompanying drawings should be considered only as illustrative, not restrictive, and if there are any such modifications and variations, they will fall within the scope of the present invention described herein. In addition, the background technology is intended to illustrate the current status and significance of the research and development of the present technology, and is not intended to limit the present invention or the application field of the present application and the present invention.

[0032] Example 1

[0033] A capacitor deionization electrochemical treatment device of the present invention, such as Figure 1 As shown, it includes a device body 100, an electrode module 200, an electrode slot 300 and a water inlet 400. The water inlet 400 is provided with a spray water inlet head, and the water inlet 400 is arranged above the device body 100. The spraying method can slow down the impact of water flow on the electrode module 200, and the sprayed water will spray to the edge of the first electrode module 200, and the water flows from the edge to the center, which can play a role in slowing down the flow rate of the water flow; the spraying process can also play a role in aeration, oxidizing a part of the organic matter, solving the problem of poor effect of the electric adsorption device in removing pollutants.

[0034] The device body 100 is generally cylindrical and includes a housing 110 and a support member 120. The support member 120 is disposed on one side of the housing 110. Figure 3 As shown, the support member 120 is provided with an electrode slot 300, and the electrode module 200 is detachably provided on the support member 120 through the electrode slot 300, and the electrode slot 300 can provide positive or negative electricity for the electrode module 200. The top of the housing 110 is uncovered, and a bottom plate 130 is detachably provided at the bottom.

[0035] Moreover, the present invention is also provided with an electrode actuator 500, which includes a transmission belt 510 and a driving device 520. The driving device 520 is arranged between the support 120 and the transmission belt 510, and is used to drive the transmission belt 510 to move around the support 120. The transmission belt 510 is arranged around the support 120 and can move relatively along the length direction of the support 120. The transmission belt 510 is provided with an electrode card slot 300, and the electrode module 200 is arranged on the transmission belt 510 through the electrode card slot 300, and the electrode card slot 300 provides positive or negative electricity for the electrode module 200. It is worth noting that the electrode card slot 300 can be a magnetic card slot, so that the card installation is more convenient and firm. The electrode module 200 is arranged on the inner and outer sides of the device body 100 through the electrode card slot 300 perpendicular to the movement direction of the electrode actuator 500. During replacement, the electrode module 200 outside the device body 100 is removed from the electrode slot 300 , and a new electrode module 200 is inserted into the electrode slot 300 , and the electrode actuator 500 is operated to transfer the new electrode module 200 to the inside of the device body 100 .

[0036] like Figure 2 As shown, the electrode module 200 includes an anode module 210 and a cathode module 220, and the anode module 210 and the cathode module 220 are arranged in parallel. Generally speaking, during the use of the electrode module 200, the anode module 210 is located above the cathode module 220. The diameter of the anode module 210 is D1, the diameter of the cathode module 220 is D2, and the inner diameter of the device body 100 is D3, then D1=D2<D3. In actual applications, the diameter D1 of the anode module 210 is slightly smaller than the inner diameter of the device. The diameter of the anode module 210 is D1, and the inner diameter of the anode water inlet hole 213 is D4, D4:D1=1:5-1:9. The anode module 210 includes an anode support plate 211, an anode electrode plate 212 and an anode water inlet 213. The anode water inlet 213 is arranged in the middle of the anode electrode plate 212. The anode electrode plate 212 is arranged on the anode support plate 211. The anode support plate 211 is generally made of metal, and the diameter of the anode support plate 211 is generally larger than the diameter of the anode electrode plate 212. It is worth noting that the anode support plate 211 can be set in a ring shape and set on the outside of the anode electrode plate 212, or it can be set in a circle and set at the bottom of the anode electrode plate 212. When the anode support plate 211 is set at the bottom, the anode support plate 211 has the best supporting effect on the anode electrode plate 212. An anode sealing ring 214 is arranged on the peripheral side of the anode support plate 211. The material of the anode sealing ring 214 has a certain elasticity to prevent the spray water from leaking out from the gap between the anode support plate 211 and the device body 100. It is worth noting that if Figure 4As shown, the upper surface of the anode module 210 can be set to be concave, and the angle between the concave surface and the horizontal plane does not exceed 15°, so that the water flow can slowly flow into the anode water inlet hole 213 and does not stay on the upper surface of the anode module 210. In addition, the width of the anode sealing ring 214 is much smaller than the diameter of the anode module 210. To further illustrate, the width of the anode sealing ring 214 is L, and the diameter of the anode module 210 is D1, then D1>35L.

[0037] The cathode module 220 includes a cathode support plate 221, a cathode electrode plate 222 and a cathode water outlet 223. The cathode support plate 221 is generally made of metal, and the diameter of the cathode support plate 221 is generally larger than the diameter of the cathode electrode plate 222. In practical applications, the diameter D2 of the cathode module 220 is generally slightly smaller than the inner diameter of the device body 100. Figure 2 As shown, a cathode sealing ring 224 is provided on the circumferential side of the cathode support plate 221. The material of the sealing ring has a certain elasticity to prevent wastewater from leaking from the gap between the cathode support plate 221 and the device body 100. In addition, the width of the cathode sealing ring 224 is much smaller than the diameter of the cathode module 220. To further illustrate, the width of the cathode sealing ring 224 is L, and the diameter of the cathode module 220 is D2, then D2>35L. The cathode electrode plate 222 and the cathode water outlet 223 are arranged on the cathode support plate 221, and the cathode water outlet 223 is arranged at the edge of the cathode support plate 221. The cathode support plate 221 can be set to be annular and arranged on the outside of the cathode electrode plate 222, or it can be set to be circular and arranged at the lower part of the cathode electrode plate 222. When the cathode support plate 221 is arranged at the lower part, the cathode support plate 221 has the best supporting effect on the cathode electrode plate 222. It is worth noting that, if Figure 4 As shown, the upper surface of the cathode module 220 can be set to be low on the outside and high in the middle, and generally the angle with the horizontal plane does not exceed 15°, so that the water flow can slowly flow into the cathode water outlet 223 and does not stay on the upper surface of the cathode module 220.

[0038] The electrode plate is generally made of one or more materials such as nickel foam, titanium foam, graphite paper, etc. The electrode plate is coated with electrode material, which is made of one or more of graphene, activated carbon, carbon nanotubes, carbon aerogel and modified composite materials thereof. The electrode material coating density is 3.0-5.0 mg / cm 2 .

[0039] It is worth noting that the valve of the water inlet 400, the bottom plate 130 and the electrode actuator 500 can all be intelligently controlled by the PLC system. Among them, the electric control system in the PLC system controls the power on and off of the anode support plate 211 and the cathode support plate 221, and the power on voltage and the reverse voltage are both 1.0-5.0V.

[0040] In this embodiment, the area of ​​the anode water inlet 213 is equal to the sum of the areas of the cathode water outlet 223, so that the water inlet volume is equal to the water outlet volume. At this time, the water inlet and outlet efficiency of the device is the highest, further improving the treatment efficiency of the electrosorption device. In addition, the diameter of the anode module 210 is D1, the inner diameter of the anode water inlet 213 is D4, D4:D1=1:5, the width of the cathode sealing ring 224 is L, the diameter of the cathode module 220 is D2, D2=38L, and the cathode water outlet 223 is set to 8. Electrode material coating density 5.0mg / cm 2 , the connected and reverse voltage is 2.5 V. When the above parameters are used to treat sewage with a fluoride ion concentration of 4 mg / L and a sulfate ion concentration of 1000 mg / L, the fluoride ion removal rate is 93% and the sulfate ion removal rate is 97%.

[0041] Example 2

[0042] The basic content of this embodiment is the same as that of embodiment 1, except that: in this embodiment, the area of ​​the anode water inlet hole 213 is smaller than the sum of the areas of the cathode water outlet holes 223, and the water inlet volume is smaller than the water outlet volume. The diameter of the anode module 210 is D1, the inner diameter of the anode water inlet hole 213 is D4, D4:D1=1:8, the width of the cathode sealing ring 224 is L, the diameter of the cathode module 220 is D2, D2=40L, and 9 cathode water outlet holes 223 are provided on the cathode support plate 221. Electrode material coating density 4.0mg / cm 2 , the connected and reverse voltage is 1.0 V. When the above parameters are used to treat sewage with a fluoride ion concentration of 6 mg / L and a sulfate ion concentration of 2000 mg / L, the fluoride ion removal rate is 90% and the sulfate ion removal rate is 95%.

[0043] Example 3

[0044] The basic content of this embodiment is the same as that of embodiment 1, except that: in this embodiment, the area of ​​the anode water inlet 213 is greater than the sum of the areas of the cathode water outlet 223, and the water inlet volume is greater than the water outlet volume. At this time, water flow may be retained. The diameter of the anode module 210 is D1, the inner diameter of the anode water inlet 213 is D4, D4:D1=1:9, the width of the cathode sealing ring 224 is L, the diameter of the cathode module 220 is D2, D2=41L, and 6 cathode water outlets 223 are provided on the cathode support plate 221. Electrode material coating density 3.0mg / cm 2 , the connected and reverse voltage is 5.0 V. When the above parameters are used to treat sewage with a fluoride ion concentration of 5 mg / L and a sulfate ion concentration of 1500 mg / L, the fluoride ion removal rate is 95% and the sulfate ion removal rate is 98%.

[0045] More specifically, although exemplary embodiments of the present invention have been described herein, the present invention is not limited to these embodiments, but includes any and all embodiments that are recognizable by those skilled in the art based on the foregoing detailed description, such as combinations between the various embodiments, adaptive changes and / or replacements. The limitations in the claims may be interpreted broadly based on the language used in the claims and are not limited to the examples described in the foregoing detailed description or during the implementation of the application, which examples should be considered non-exclusive. Any steps listed in any method or process claim may be performed in any order and are not limited to the order presented in the claim. Therefore, the scope of the present invention should be determined solely by the attached claims and their legal equivalents, rather than by the description and examples given above.

Claims

1. A capacitive deionization electrochemical treatment device, characterized in that: The device comprises a device body (100), an electrode module (200), an electrode slot (300), a water inlet (400) and an electrode actuator (500), wherein the water inlet (400) is provided with a spray water inlet head, and the water inlet (400) is arranged above the device body (100); The device body (100) comprises a housing (110) and a support member (120); the support member (120) is arranged on one side of the housing (110); an electrode slot (300) is arranged on the support member (120); and the electrode module (200) is detachably arranged on the support member (120) via the electrode slot (300); The electrode actuator (500) is arranged on the support member (120); the electrode actuator (500) comprises a transmission belt (510) and a driving device (520), and the driving device (520) is arranged between the support member (120) and the transmission belt (510); the transmission belt (510) is provided with an electrode clamping groove (300), and the electrode module (200) is arranged on the transmission belt (510) through the electrode clamping groove (300); The electrode module (200) comprises an anode module (210) and a cathode module (220), and the anode module (210) and the cathode module (220) are arranged in parallel; The anode module (210) comprises an anode support plate (211), an anode electrode plate (212) and an anode water inlet hole (213); the anode water inlet hole (213) is arranged in the middle of the anode electrode plate (212); the anode electrode plate (212) is arranged on the anode support plate (211); the upper surface of the anode module 210 is arranged in a concave form, and the angle between the concave surface and the horizontal plane does not exceed 15°; The cathode module (220) comprises a cathode support plate (221), a cathode electrode plate (222) and a cathode water outlet hole (223), wherein the cathode electrode plate (222) and the cathode water outlet hole (223) are arranged on the cathode support plate (221); the upper surface of the cathode module 220 is arranged in a shape with a lower outer side and a higher middle side, and the angle with the horizontal plane does not exceed 15°; The water sprayed from the water inlet (400) will be sprayed onto the edge of the anode module (210), and the water will flow from the edge of the anode module (210) to the anode water inlet hole (213) in the center.

2. A capacitive deionization electrochemical treatment device according to claim 1, characterized in that: A bottom plate (130) is detachably provided at the bottom of the housing (110).

3. A capacitive deionization electrochemical treatment device according to claim 1 or 2, characterized in that: The electrode slot (300) is a magnetic slot.

4. A capacitive deionization electrochemical treatment device according to claim 3, characterized in that: Sealing rings are provided around the anode module (210) and the cathode module (220).

5. A capacitive deionization electrochemical treatment device according to claim 4, characterized in that: The width of the sealing ring is L, the diameter of the anode module (210) is D1, and the diameter of the cathode module (220) is D2, then D1=D2>35L.

6. A capacitive deionization electrochemical treatment device according to claim 5, characterized in that: The area of ​​the anode water inlet hole (213) is equal to the sum of the areas of the cathode water outlet holes (223).

7. A capacitive deionization electrochemical treatment device according to claim 5, characterized in that: The diameter of the anode module (210) is D1, and the inner diameter of the anode water inlet hole (213) is D4, so D4:D1=1:5-1:9.

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