A membrane electrode reaction device

Abstract

The application provides a membrane electrode reaction device, and belongs to the technical field of sewage treatment equipment, and comprises: a device body, the device body is provided with an electrolysis cavity, and water inlet pipes and water outlet pipes communicating with the electrolysis cavity; a water blocking part, the water blocking part is arranged opposite to the water inlet pipe; a flow guide part, the flow guide part is arranged in the electrolysis cavity; and a BDD electrode module between the water blocking part and the flow guide part. The membrane electrode reaction device of the application can prevent the water inlet from directly impacting the BDD electrode module by arranging the water blocking part, and can avoid the problem of breakage due to insufficient strength, and the flow guide part is arranged, so that the bubbles can be guided to the water outlet pipe through the flow guide slope and discharged.

Description

Technical Field

[0001] This application belongs to the technical field of wastewater treatment equipment, specifically relating to a membrane electrode reaction device. Background Technology

[0002] Electrochemical wastewater treatment utilizes the basic principle of electrolysis to oxidize and reduce harmful substances in wastewater at the anode and cathode, successfully mineralizing them into harmless inorganic substances and thus purifying the wastewater. For highly difficult-to-treat industrial wastewater, conventional treatment processes and methods often yield minimal results; therefore, BDD electrochemical treatment is the preferred choice.

[0003] The existing BDD electrode modules have the following characteristics:

[0004] 1. The BDD electrode module is structurally arranged in a layered manner of BDD electrode sheets, cathode plates, BDD electrode sheets, and cathode plates, and is encapsulated with multiple metal terminals, multiple conductive sheets, and other components. When wastewater passes through the electrode module, the wastewater flows through the gap between each BDD electrode sheet and the cathode plate. Organic pollutants are directly oxidized on the surface of the BDD electrode sheets, or indirectly oxidized by strong oxidizing active substances generated by electrocatalysis. The oxidation effect depends on the form of the BDD electrode sheets and the coating process, and is therefore quite limited.

[0005] 2. BDD electrode sheets lack internal micropores. The coating process simply deposits a layer of boron-dipped diamond electrode material (BDD) onto the surface of the BDD electrode sheet. Therefore, wastewater electrolysis can only occur through the surface of the BDD electrode sheet. Organic pollutants can only be oxidized on the surface of the BDD electrode sheet or indirectly oxidized by strongly oxidizing active substances generated by electrocatalysis. Furthermore, ensuring wastewater flows through the gaps between each BDD electrode sheet and the cathode plate requires careful consideration of the electrolytic cell shape. For example, baffles are necessary, and the size of the gap between the baffle and the module is crucial. Too small a gap makes module installation difficult, while too large a gap allows wastewater to escape, reducing the flow rate between the anode and cathode plates. Overall, the efficiency for wastewater treatment is relatively low. Therefore, the efficiency can only be improved by adjusting the liquid flow rate, the appropriate current density, and increasing the circulation time of wastewater in the BDD advanced oxidation system.

[0006] 3. The electrode module does not have a filtration function. A filter needs to be added to the BDD advanced oxidation system to filter out scum, dirt and other substances generated during the electrolysis process.

[0007] 4. Bubbles generated during electrolysis tend to accumulate inside the reactor, affecting electrolysis efficiency.

[0008] 5. Under high water pressure, the BDD electrode module is easily damaged by impact. Summary of the Invention

[0009] This application aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, this application provides a membrane electrode reactor capable of solving the problems of water pressure impact and bubble aggregation.

[0010] The membrane electrode reaction apparatus according to an embodiment of this application includes:

[0011] The device body is provided with an electrolysis chamber and an inlet pipe and an outlet pipe that connect the electrolysis chamber;

[0012] A water-blocking part is provided inside the electrolysis chamber and is positioned directly opposite the water inlet pipe. A water passage is provided between the water-blocking part and the port of the water inlet pipe.

[0013] A flow guide is provided inside the electrolysis chamber and close to the water outlet pipe. The water-facing end of the flow guide is provided with a flow guide slope, which extends from the side wall of the electrolysis chamber toward the water outlet pipe along the direction from the water inlet pipe to the water outlet pipe.

[0014] The BDD electrode module is disposed within the electrolysis chamber and located between the water-blocking part and the flow-guiding part.

[0015] The membrane electrode reaction device according to the embodiments of this application has at least the following beneficial effects: The membrane electrode reaction device of this application, by providing a water-blocking part, can prevent the incoming water from directly impacting the BDD electrode module and avoid the problem of damage due to insufficient strength. At the same time, it is provided with a flow guide part, which can guide the air bubbles through the flow guide slope to the outlet pipe for discharge.

[0016] According to some embodiments of this application, a cone portion is provided on the part of the water-blocking portion facing the water inlet pipe.

[0017] According to some embodiments of this application, the water-blocking part is provided with a plurality of connecting parts at intervals on the periphery of the cone part, the end of the connecting part is connected to the inner wall of the electrolysis chamber, and the water passage is formed between two adjacent connecting parts.

[0018] According to some embodiments of this application, a flow guiding platform is provided at the bottom of the flow guiding part, and a water outlet hole is opened on the flow guiding platform facing the position of the water outlet pipe, and the flow guiding slope extends to the end face of the flow guiding platform.

[0019] According to some embodiments of this application, along the direction from the inlet pipe to the outlet pipe, the BDD electrode module includes alternately arranged cathode plates and BDD anode plates, and both the cathode plates and the BDD anode plates are provided with water-passing structures.

[0020] According to some embodiments of this application, the BDD electrode module includes two cathode plates and one BDD anode sheet. The BDD anode sheet is disposed between the two cathode plates. The cathode plate includes a first plate surface and a second plate surface. The first plate surface is disposed opposite to the BDD anode sheet at a distance. The second plate surface is connected to at least two opposite sides of the first plate surface. The second plate surface extends in a direction away from the BDD anode sheet. A cathode conductive sheet is disposed at the end of the second plate surface of the cathode plate.

[0021] According to some embodiments of this application, the BDD anode sheet is connected to anode conductive sheets on opposite sides, and the cathode conductive sheet and the anode conductive sheet are staggered at an angle.

[0022] According to some embodiments of this application, the BDD electrode module further includes a PTFE pad, which is disposed between the cathode plate and the BDD anode plate.

[0023] According to some embodiments of this application, both the first plate surface and the second plate surface are mesh plates, and the BDD anode sheet is provided with micron-level pores.

[0024] According to some embodiments of this application, the device body is provided with a first rubber gasket that presses against the cathode plate and a second rubber gasket that presses against the BDD anode plate.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0026] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a cross-sectional view of this application;

[0028] Figure 2 This is a schematic diagram of an overall structure of this application;

[0029] Figure 3 This is an axonometric sectional view of this application;

[0030] Figure 4 This is a schematic diagram of one structure of the BDD electrode module in this application;

[0031] Figure 5 This is a schematic diagram of one structure of the water-blocking part in this application;

[0032] Figure 6 This is a schematic diagram illustrating one application of this application. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0037] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Reference Figures 1 to 6 The embodiments of this application provide a membrane electrode reaction device, comprising:

[0039] The device body 100 is provided with an electrolysis chamber 105 and an inlet pipe 106 and an outlet pipe 107 that connect the electrolysis chamber 105.

[0040] A water-blocking part 200 is provided inside the electrolysis chamber 105 and is positioned directly opposite the water inlet pipe 106. A water passage is provided between the water-blocking part 200 and the port of the water inlet pipe 106.

[0041] The guide section 400 is disposed inside the electrolysis chamber 105 and is located near the water outlet pipe 107. The water-facing end of the guide section 400 is provided with a guide slope 401, which extends from the side wall of the electrolysis chamber 105 toward the water outlet pipe 107 along the direction from the water inlet pipe 106 to the water outlet pipe 107.

[0042] The BDD electrode module 300 is disposed in the electrolysis chamber 105 and located between the water-blocking part 200 and the flow-guiding part 400.

[0043] During testing, wastewater is fed into the electrolysis chamber 105 through the inlet pipe 106. Blocked by the water-retaining section 200, the wastewater enters the electrolysis chamber 105 through the water passages surrounding the water-retaining section 200. After electrolytic catalytic oxidation by the BDD electrode module 300, it is discharged from the outlet pipe 107. Under the flushing action of the water flow, the bubbles generated during electrolysis are guided out of the outlet pipe 107 by the flow guide section 400.

[0044] Therefore, the membrane electrode reactor of this application, by setting the water-blocking part 200, can prevent the incoming water from directly impacting the BDD electrode module 300, avoiding the problem of damage due to insufficient strength. At the same time, the flow guide part 400 can guide the air bubbles through the flow guide slope 401 to the water outlet pipe 107 for discharge, so that they will not accumulate and affect the electrolysis efficiency.

[0045] Reference Figure 5 In some embodiments of this application, a conical portion 201 is provided on the portion of the water-blocking part 200 facing the water inlet pipe 106. Since the water-blocking part 200 is directly facing the water inlet pipe 106, the water flow will directly impact the water-blocking part 200. In this embodiment, by providing the conical portion 201, it can both prevent the incoming water from directly impacting the BDD electrode module 300 and facilitate the rapid entry of incoming water into the electrolysis chamber 105.

[0046] Reference Figure 5 In some embodiments of this application, the water-blocking part 200 is provided with multiple connecting parts 202 at intervals around the periphery of the cone part 201. The end of the connecting part 202 is connected to the inner wall of the electrolysis chamber 105, and a water passage is formed between two adjacent connecting parts 202. In this embodiment, the cone part 201 is connected by multiple connecting parts 202, which can ensure the structural strength and installation stability of the cone part 201 and avoid damage or loosening under the impact of water inflow.

[0047] Reference Figure 4In some embodiments of this application, a flow guiding platform 402 is provided at the bottom of the flow guiding part 400, and a water outlet hole is opened on the flow guiding platform 402 directly opposite the water outlet pipe 107. The flow guiding slope 401 extends to the end face of the flow guiding platform 402. In this embodiment, the flow guiding platform 402 is provided to improve the installation stability of the flow guiding part 400. Furthermore, screws can be used to install and fix the part on the flow guiding platform 402.

[0048] Reference Figures 1 to 4 In some embodiments of this application, along the direction from the inlet pipe 106 to the outlet pipe 107, the BDD electrode module 300 includes alternately arranged cathode plates 301 and BDD anode plates 302, both of which are provided with water-passing structures. By providing these water-passing structures, wastewater can pass through them and be electrolytically catalytically oxidized during its passage. The dimensions of the water-passing structures can be flexibly set, thereby achieving a filtration effect using the cathode plates 301 and BDD anode plates 302. Compared to traditional structures, no additional filter is required, which simplifies the structural composition.

[0049] Reference Figure 3 and Figure 4 In some embodiments of this application, the BDD electrode module 300 includes two cathode plates 301 and one BDD anode plate 302. The BDD anode plate 302 is disposed between the two cathode plates 301. The cathode plate 301 includes a first plate surface 3011 and a second plate surface 3012. The first plate surface 3011 and the BDD anode plate 302 are disposed opposite each other at a distance. The second plate surface 3012 is connected to at least two opposite sides of the first plate surface 3011. The second plate surface 3012 extends in a direction away from the BDD anode plate 302. A cathode conductive sheet 3013 is disposed at the end of the second plate surface 3012 of the cathode plate 301.

[0050] In this embodiment, the cathode plate 301, through the arrangement of the second plate surface 3012, provides a large distance between the cathode conductive sheet 3013 and the BDD anode sheet 302, which can effectively prevent electrochemical corrosion of the cathode conductive sheet 3013 and the connecting rod.

[0051] Reference Figure 4 In some embodiments of this application, anode conductive sheets 3021 are connected to opposite sides of the BDD anode sheet 302, and the cathode conductive sheet 3013 and the anode conductive sheet 3021 are distributed in an angularly staggered manner. In this embodiment, the angularly staggered distribution of the cathode conductive sheet 3013 and the anode conductive sheet 3021 helps to increase the distance between them. Furthermore, since the cathode conductive sheet 3013 is connected to the end of the second plate surface 3012, i.e., the end furthest from the BDD anode sheet 302, the distance between the cathode conductive sheet 3013 and the anode conductive sheet 3021 is relatively large, which can avoid electrochemical corrosion.

[0052] In some embodiments of this application, the BDD electrode module 300 further includes a PTFE pad disposed between the cathode plate 301 and the BDD anode plate 302.

[0053] It is understood that, based on the aforementioned embodiments, PTFE pads are disposed at both ends of the BDD anode plate 302. Since the water flow exerts a certain impact force on the BDD electrode module 300, this embodiment effectively supports the BDD anode plate 302 by using PTFE pads, ensuring its structural strength. Preferably, the cathode plate 301 also abuts against the PTFE pads, thereby improving the overall structural strength.

[0054] Reference Figure 4 In some embodiments of this application, the first plate surface 3011 and the second plate surface 3012 are both mesh plates, and the BDD anode plate 302 is provided with micron-level pores. When wastewater is fed in, the wastewater can be filtered by the cathode plate 301 and the BDD anode plate 302, while increasing the contact area with the wastewater, thereby improving the electrolysis efficiency.

[0055] Reference Figures 1 to 3 In some embodiments of this application, the device body 100 is provided with a first rubber gasket that presses against the cathode plate 301 and a second rubber gasket that presses against the BDD anode plate 302. The rubber gaskets are preferably made of fluororubber.

[0056] In this embodiment, rubber gaskets are used to press the cathode plate 301 and the BDD anode plate 302 together, which can ensure the sealing of their periphery and also press their respective conductive sheets together to ensure conductivity.

[0057] Reference Figures 1 to 6 In some embodiments of this application, the membrane electrode reaction device includes a device body 100, a water-blocking part 200, a flow guiding part 400, and a BDD electrode module 300.

[0058] The device body 100 includes a first end cap 101, a first intermediate block 102, a second intermediate block 103, and a second end cap 104 connected in sequence. An electrolytic chamber 105 with a rectangular cross-section is centrally located at the first end cap 101, the first intermediate block 102, the second intermediate block 103, and the second end cap 104. A water inlet pipe 106 communicating with the electrolytic chamber 105 is located at the upper center of the first end cap 101. A water outlet pipe 107 communicating with the electrolytic chamber 105 is located at the lower center of the second end cap 104. A first recess is recessed at the inner wall joint of the first end cap 101 and the first intermediate block 102, and a second recess is recessed at the inner wall joint of the second end cap 104 and the second intermediate block 103. A third recess is recessed at the inner wall joint of the first intermediate block 102 and the second intermediate block 103. A first rubber gasket is placed in the first and second recesses, and two second rubber gaskets are stacked in the third recess. Both the first and second rubber gaskets are made of fluororubber.

[0059] A water-blocking part 200 is disposed within the electrolysis chamber 105. The water-blocking part 200 includes a mounting ring 203, a connecting part 202, and a conical part 201. The mounting ring 203 is connected to the first end cap 101 by screws and is coaxially arranged with the water inlet pipe 106. Multiple connecting parts 202 are connected between the lower end of the mounting ring 203 and the conical part 201. The conical part 201 has a conical structure, and its center is coaxially arranged with the water inlet pipe 106. A water passage is formed between the conical part 201 and the first end cap 101.

[0060] A flow guide section 400 is disposed at the bottom of the electrolysis chamber 105. The outer contour dimensions of the flow guide section 400 match those of the electrolysis chamber 105, thereby maintaining a close fit with the inner wall of the electrolysis chamber 105. The water-facing end of the flow guide section 400 is concave from all four sides towards the center and downwards, forming four flow guide slopes 401. A flow guide platform 402 is disposed at the bottom center of the flow guide slopes 401. The upper end of the flow guide slopes 401 is close to the inner wall of the electrolysis chamber 105, while the lower end is located on the flow guide platform 402. A water outlet hole is disposed at the center of the flow guide platform 402, and the diameter of the water outlet hole is slightly larger than the inner diameter of the water outlet pipe 107.

[0061] The BDD electrode module 300 is disposed within the electrolysis chamber 105, located between the water-blocking part 200 and the flow-guiding part 400. The BDD electrode module 300 comprises, from top to bottom, a cathode plate 301, a PTFE pad, a BDD anode sheet 302, another PTFE pad, and the cathode plate 301 stacked sequentially. The cathode plate 301 includes a first plate surface 3011 that adheres to the PTFE pad and a second plate surface 3012 extending vertically from both ends of the first plate surface 3011 away from the PTFE pad. A flange is provided at the end of the second plate surface 3012. The two cathode plates 301 are symmetrically arranged vertically. The flanges of the two cathode plates 301 are respectively pressed into a first recess and a second recess, i.e., pressed by a first rubber gasket. The flanges on both sides of the cathode plate 301 connect to cathode conductive sheets 3013, which are pressed against the flanges by the first rubber gasket. The cathode conductive sheet 3013 extends inward and then a certain length away from the BDD anode sheet 302 to connect to the cathode terminal. The cathode terminals of the two cathode plates 301 pass vertically through the first end cap 101 and the second end cap 104 respectively. The periphery of the BDD anode sheet 302 is pressed between two second rubber gaskets. Anode conductive sheets 3021 are provided on both sides adjacent to the BDD anode sheet 302 and the cathode conductive sheet 3013, and the anode conductive sheets 3021 are also pressed by the second rubber gaskets. The anode conductive sheets 3021 extend inward and then a certain length upward to connect to the anode terminal. The mating position of the anode conductive sheet 3021 and the anode terminal is lower than the mating position of the cathode conductive sheet 3013 and the cathode terminal. The anode terminal extends upward through the first end cap 101. The cathode plate 301 and the PTFE gasket are both porous mesh structures, while the BDD anode sheet 302 has a micron-sized pore structure.

[0062] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A membrane electrode reaction device, characterized by, The device comprises: a device body provided with an electrolysis cavity, a water inlet pipe and a water outlet pipe communicating with the electrolysis cavity; a water blocking part provided in the electrolysis cavity and opposite to the water inlet pipe, a water passing channel being provided between the water blocking part and the port of the water inlet pipe; a water guiding part provided in the electrolysis cavity and close to the water outlet pipe, a water guiding slope being provided at the water receiving end of the water guiding part, extending from the side wall of the electrolysis cavity to the water outlet pipe in the direction from the water inlet pipe to the water outlet pipe; a BDD electrode module provided in the electrolysis cavity and between the water blocking part and the water guiding part; in the direction from the water inlet pipe to the water outlet pipe, the BDD electrode module comprises two cathode plates and one BDD anode sheet provided alternately, the BDD anode sheet being provided between the two cathode plates, the cathode plate comprising a first plate surface and a second plate surface, the first plate surface being provided opposite to the BDD anode sheet, the second plate surface being connected to at least two opposite sides of the first plate surface, the second plate surface extending in the direction away from the BDD anode sheet, and a cathode conductive sheet being provided at the end of the second plate surface.

2. The membrane electrode reaction device according to claim 1, characterized by The water blocking part opposite to the water inlet pipe is provided with a tapered part.

3. The membrane electrode reaction device according to claim 2, characterized by The water blocking part is provided with a plurality of connecting parts at the circumferential side of the tapered part, the end of the connecting part being connected to the inner wall of the electrolysis cavity, and the water passing channel being formed between two adjacent connecting parts.

4. The membrane electrode reaction device according to claim 1, characterized by The bottom of the water guiding part is provided with a water guiding platform, a water outlet hole being provided at the position opposite to the water outlet pipe, and the water guiding slope extending to the end surface of the water guiding platform.

5. The membrane electrode reaction device according to claim 1, characterized by The cathode plate and the BDD anode sheet are both provided with water passing structures.

6. The membrane electrode reaction device according to claim 1, characterized by The two opposite sides of the BDD anode sheet are connected with anode conductive sheets, and the cathode conductive sheet and the anode conductive sheet are distributed in an angular manner.

7. The membrane electrode reaction device according to claim 1, characterized by The BDD electrode module further comprises a tetrafluoro pad provided between the cathode plate and the BDD anode sheet.

8. The membrane electrode reaction device according to claim 1, characterized by The first plate surface and the second plate surface are both grid plates, and the BDD anode sheet is provided with micron-sized pores.

9. The membrane electrode reaction device according to claim 1, characterized by The device body is provided with a first rubber gasket for pressing the cathode plate and a second rubber gasket for pressing the BDD anode sheet.

Images