A bidirectional flow-through electrolyzer and series system thereof

Abstract

This invention discloses a bidirectional flow electrolytic cell and its series system, specifically relating to the field of chemical and environmental protection technology. The invention includes a main electrode electrolytic flow cell, which comprises an electrolytic cell shell. Several insertion slots for the auxiliary electrode electrolytic chamber are provided on the top surface of the shell. By connecting multiple main electrode electrolytic flow cells in series, this invention achieves bidirectional flow electrolysis, significantly increasing the volume of the electrolytic cell. Furthermore, the main electrode electrolytic flow cells in the entire series system are completely interconnected, allowing the electrolyte to flow through the main electrode electrolytic flow cells for a relatively long time. Each time the electrolyte passes through a section of the main electrode electrolytic flow cell, it undergoes repeated electrolysis, ensuring a more complete electrolysis reaction and enabling continuous flow electrolysis, thus improving the wastewater treatment capacity of electrolysis technology.

Description

Technical Field

[0001] This invention relates to the field of chemical environmental protection technology, specifically to a bidirectional flow electrolytic cell and its series connection system. Background Technology

[0002] In chemical production, redox reactions are frequently encountered, requiring raw materials such as oxidants or reducing agents. Electrolysis uses electrons as oxidants or reducing agents, making it a clean production technology and a green production process. The well-known electrolysis of salt (sodium chloride) water to produce caustic soda (sodium hydroxide) is one of the most mature electrolysis processes. Currently, many production processes of polymers and pharmaceutical intermediates also employ electrolysis technology.

[0003] In the environmental protection field, wastewater from industries such as pharmaceuticals, papermaking, and printing and dyeing often contains high concentrations of organic matter, complex compositions, and numerous recalcitrant substances, making its treatment challenging. Electrolysis can effectively improve the biodegradability of these recalcitrant substances. The production processes of pharmaceuticals, pesticides, dyes, explosives, and other chemical products generate wastewater containing nitrobenzene compounds, which are biologically recalcitrant and present significant challenges in wastewater treatment. Electrolysis can effectively treat this type of wastewater. Mining, metallurgy, and chemical industries are major anthropogenic sources of heavy metal pollution in water bodies, including mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), copper (Cu), zinc (Zn), cobalt (Co), and nickel (Ni). Electrolysis can electrodeposit these heavy metals onto the electrode surface, allowing for their separation and recovery from the water. Furthermore, harmful substances in industrial waste gas or solid waste, absorbed by absorbent liquids and entering the aqueous phase, can also be treated using electrolysis.

[0004] Traditional electrolysis methods have limited capacity to treat wastewater, mainly because traditional electrolyzers use a fixed electrolysis mode, the wastewater does not flow, and it needs to be treated in batches at set times. Summary of the Invention

[0005] The purpose of this invention is to provide a bidirectional flow electrolytic cell and its series system. By connecting multiple main electrode electrolytic flow cells in series, bidirectional flow electrolysis is achieved, greatly increasing the volume of the electrolytic cell. Furthermore, the main electrode electrolytic flow cells in the entire series system are completely interconnected. Since the cross-sectional area of ​​the main electrode electrolytic flow cell is more than five times that of the electrolyte flow pipe, the flow rate of the electrolyte slows down after it flows into the main electrode electrolytic flow cell. Because the pressure in the entire main electrode electrolytic flow cell is balanced, no eddies are generated, so the electrolyte takes a relatively long time to flow through the main electrode electrolytic flow cell. The electrolyte undergoes repeated electrolysis each time it passes through a section of the main electrode electrolytic flow cell, ensuring a more complete electrolysis reaction and enabling continuous flow electrolysis. This improves the wastewater treatment capacity of electrolysis technology, thereby solving the problems mentioned in the background section.

[0006] This invention can be achieved through the following technical solution: a bidirectional flow electrolytic cell, comprising a main electrode flow electrolytic cell, wherein the main electrode flow electrolytic cell includes an electrolytic cell shell, the top surface of the electrolytic cell shell is provided with a plurality of insertion slots for the entry of auxiliary electrode electrolytic chambers, and mounting bases are fixedly connected to both ends of the electrolytic cell shell, the plurality of insertion slots are arranged in parallel, and main electrode flow electrolytic chambers are provided inside the electrolytic cell shell at both ends of two adjacent auxiliary electrode electrolytic chambers, and two auxiliary electrolytes are installed on the top surface of each auxiliary electrode electrolytic chamber. The inlet and outlet guide pipes are connected to two rows of guide pipes perpendicular to the direction of the main electrode flow electrolysis chamber. The inlet pipe and outlet pipe are respectively connected to the ends of the inlet pipe and outlet pipe to the auxiliary electrolyte storage tank one and the auxiliary electrolyte storage tank two. The auxiliary electrolyte storage tank one and the auxiliary electrolyte storage tank two are set in the support frame. A circulation pump connected to the outlet of the auxiliary electrolyte storage tank two is installed in the side of the support frame. The outlet end of the circulation pump is connected to the inlet end of the auxiliary electrolyte storage tank one.

[0007] A further technical improvement of the present invention is that: a plurality of terminals 1 are installed on the top surface of the main electrode electrolysis flow channel and above the main electrode flow electrolysis chamber, and a plurality of terminals 2 are installed on the top surface of the auxiliary electrode electrolysis chamber; the leads of the main electrolysis electrode are all connected to the anode (or cathode) of the electrolysis power supply, and the leads of the auxiliary electrode are all connected to the cathode (or anode) of the electrolysis power supply.

[0008] A further technical improvement of the present invention is that: the ends of the inflow pipe and the outflow pipe are respectively provided with a branch pipe one and a branch pipe two, and each of the branch pipe one and branch pipe two is provided with a plurality of connecting pipes that cooperate with the guide pipe on the surface. The outer surface of the guide pipe is provided with a raised ring strip, and the inner wall surface of the connecting pipe is provided with a positioning ring groove that rotatably cooperates with the raised ring strip.

[0009] A further technical improvement of the present invention is that: the bottom of the connecting pipe is provided with two gaps, and the outer surface of the bottom of the connecting pipe is provided with a clamping assembly for bonding the connecting pipe and the guide pipe together. The clamping assembly includes two clamping strips sleeved on the surface of the connecting pipe, and two adjacent clamping strips are connected by a connecting cloth. The outer surface of the connecting pipe is provided with a limiting strip for locking the clamping strips. One end of the clamping strip is provided with an adhesive mother strip, and the other end of the clamping strip is provided with an adhesive daughter strip that is bonded to the adhesive mother strip.

[0010] A further technical improvement of the present invention is that: the outer surface of the connecting pipe is provided with a bonding strip, the surface of the bonding strip is provided with a male fastener, and the end of the limiting strip is provided with a concealed fastener head that engages with the male fastener.

[0011] A further technical improvement of the present invention is that: the surface of the guide tube is provided with a channel for the entry and exit of the electrolyte, and the surface of the guide tube and below the raised ring strip are provided with a plurality of flute-shaped holes, which increase in size from top to bottom.

[0012] A further technical improvement of the present invention is that: the auxiliary electrode electrolysis chamber includes a plastic shell, an ion membrane is installed on both sides of the plastic shell, and a sealing cover is fixed to the top surface of the plastic shell, the bottom surface of the sealing cover abutting against the surface of the main electrode electrolysis flow channel.

[0013] The present invention also provides a series system of bidirectional flow electrolyzers, including a plurality of main electrode flow electrolyzers, wherein two adjacent main electrode flow electrolyzers are connected in series by fitting mounting bases, and the two main electrode flow electrolyzers at the ends are connected to a connecting shell, wherein an electrolyte inlet is installed on the surface of one connecting shell and an electrolyte outlet is installed on the surface of the other connecting shell.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. First, multiple main electrode electrolytic flow cells are connected in series to achieve bidirectional flow electrolysis, which greatly increases the volume of the electrolytic cell. The main electrode electrolytic flow cells in the entire series system are completely connected. Since the cross-sectional area of ​​the main electrode electrolytic flow cell is more than 5 times that of the electrolyte flow pipe, the flow rate of the electrolyte becomes slower after it flows into the main electrode electrolytic flow cell. Because the pressure in the entire main electrode electrolytic flow cell is balanced, no eddies are generated. Therefore, the electrolyte takes a relatively long time to flow through the main electrode electrolytic flow cell. The electrolyte undergoes repeated electrolysis each time it passes through a section of the main electrode electrolytic flow cell, so that the electrolysis reaction is more complete and continuous flow electrolysis can be carried out, thereby improving the ability of electrolysis technology to treat wastewater.

[0016] 2. By folding the bottom of the two missing parts outward, the connecting pipe can be easily fitted onto the outside of the guide pipe. After the connecting pipe and the guide pipe are installed in close contact, the clamping strip is wrapped around the connecting pipe and the limiting strip is folded over so that the hidden snap head on the limiting strip is engaged with the male snap seat, and the clamping strip is contained in the area of ​​the limiting strip. The connecting pipe and the guide pipe are then tightly connected by the adhesive strip and the adhesive strip, which ensures good connection stability and prevents them from falling off.

[0017] 3. The auxiliary electrolyte in the auxiliary electrolyte storage tank 1 is fed into several auxiliary electrode electrolysis chambers through the inflow pipe, and the auxiliary electrolyte is fed out into the auxiliary electrolyte storage tank 2 through the outflow pipe. The electrolyte is then fed back into the auxiliary electrolyte storage tank 1 through the output of the circulation pump, thus realizing cyclic electrolysis. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 This is a three-dimensional structural diagram of the connecting pipe and the guide pipe of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the main electrode electrolytic flow channel of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the auxiliary electrode electrolysis chamber of the present invention;

[0024] Figure 6 This is a schematic diagram of the installation structure of the circulating pump of the present invention;

[0025] Figure 7 This is a schematic diagram of the installation structure of the circulating pump of the present invention.

[0026] In the diagram: 1. Support frame; 2. Auxiliary electrolyte storage tank one; 3. Auxiliary electrolyte storage tank two; 4. Connecting shell; 5. Electrolyte inlet; 6. Main electrode electrolysis flow channel; 7. Electrolyte outlet; 8. Inflow pipe; 9. Branch pipe one; 10. Outflow pipe; 11. Branch pipe two; 12. Connecting pipe; 13. Guide pipe; 14. Pressing assembly; 15. Raised ring; 16. Positioning ring groove; 17. Adhesive strip 18. Empty section; 19. Pressing strip; 20. Limiting strip; 21. Concealed snap head; 22. Male snap seat; 23. Adhesive strip; 24. Adhesive strip; 25. Mounting base; 26. Main electrode flow electrolysis chamber; 27. Insertion groove; 28. Sealing cover plate; 29. ​​Terminal 1; 30. Terminal 2; 31. Plastic housing; 32. Ion membrane; 33. Circulating pump; 34. Flute-shaped round hole; 35. Channel. Detailed Implementation

[0027] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0028] Please see Figures 1-6As shown, this invention provides a bidirectional flow electrolytic cell, including a main electrode electrolytic flow cell 6. The main electrode electrolytic flow cell 6 includes an electrolytic cell shell. Several insertion slots 27 for auxiliary electrode electrolytic chambers are provided on the top surface of the electrolytic cell shell. Mounting bases 25 are fixed to both ends of the electrolytic cell shell. The insertion slots 27 are arranged in parallel. Main electrode flow electrolytic chambers 26 are provided inside the electrolytic cell shell at both ends of two adjacent auxiliary electrode electrolytic chambers. Two guide pipes 13 for auxiliary electrolyte inlet and outlet are installed on the top surface of each auxiliary electrode electrolytic chamber. The auxiliary electrolyte is a sodium sulfate solution. Both the main electrolytic electrode and the auxiliary electrode are rectangular titanium mesh electrodes with an iridium-ruthenium coating of equal area. The main electrolytic electrode and the auxiliary electrode are respectively installed in the main electrode flow electrolytic chamber 26 and the auxiliary electrode electrolytic chamber. Two rows of guide pipes 13 perpendicular to the direction of the main electrode flow electrolytic chamber 26 are respectively mounted on... An inflow pipe 8 and an outflow pipe 10 are connected for the inflow and outflow of auxiliary electrolyte. The ends of the inflow pipe 8 and the outflow pipe 10 are respectively connected to an auxiliary electrolyte storage tank 1 2 and an auxiliary electrolyte storage tank 2 3. The auxiliary electrolyte storage tank 1 2 and the auxiliary electrolyte storage tank 2 3 are set in a support frame 1. A circulation pump 33 connected to the outlet of the auxiliary electrolyte storage tank 2 3 is installed on the side of the support frame 1. The outlet end of the circulation pump 33 is connected to the inlet end of the auxiliary electrolyte storage tank 1 2. The auxiliary electrolyte in the auxiliary electrolyte storage tank 1 2 flows into several auxiliary electrode electrolysis chambers through the inflow pipe 8. The auxiliary electrolyte flows out into the auxiliary electrolyte storage tank 2 3 through the outflow pipe 10. It then re-enters the auxiliary electrolyte storage tank 1 2 through the output of the circulation pump 33. This device is implemented on a coal-fired steam boiler. The sulfur dioxide in the flue gas is absorbed by sodium carbonate absorbent and the absorption is completed in the absorption tower.

[0029] SO₂ + Na₂CO₃ = Na₂SO₃ + CO₂

[0030] Na₂SO₃ reacts with oxygen to produce sodium sulfate.

[0031] 2Na₂SO₃ + O₂ = 2Na₂SO₄

[0032] The electrolyte flowing through the main electrode is SO2 absorbent. The reaction mother liquor coming out of the absorption tower is first cooled down and then enters the circulating bidirectional flow electrolytic cell for electrolysis. On the main electrolytic electrode, sodium sulfite is oxidized to sodium sulfate.

[0033] Na₂SO₃ + H₂O = Na₂SO₄ + 2H₂O + +2e -

[0034] On the auxiliary electrode, H + It is reduced to produce hydrogen gas.

[0035] 2H+ +2e - =H2

[0036] The overall electrolysis reaction is Na₂SO₃ + H₂O = Na₂SO₄ + H₂

[0037] After undergoing electrolysis in the main electrode flow electrolysis chamber 26, sodium sulfite is completely converted into sodium sulfate. When the sodium sulfate in the absorbent reaches a saturation concentration, crystals will form in the crystallization vessel after the main electrode flow electrolysis tank 6, and enter the bottom crystallization sedimentation tank. The reaction mother liquor after crystallization separation is returned to the desulfurization absorption tower for continued recycling. This continuous flow electrolysis improves the wastewater treatment capacity of electrolysis technology, successfully recovers sulfur dioxide from flue gas, reduces desulfurization costs, and achieves the goal of resource recycling. The equipment is relatively simple, easy to manufacture, and has low cost. The bidirectional flow electrolysis method is simple and practical, and is very easy to promote and apply in the chemical and environmental protection fields.

[0038] Several terminals 29 are installed on the top surface of the main electrode electrolysis flow cell 6, above the main electrode flow electrolysis chamber 26. Several terminals 30 are installed on the top surface of the auxiliary electrode electrolysis chamber. The leads of the main electrolysis electrode are all connected to the anode (or cathode) of the electrolysis power supply, and the leads of the auxiliary electrode are all connected to the cathode (or anode) of the electrolysis power supply, so as to realize the energization of the main electrode flow electrolysis chamber 26 and the auxiliary electrode electrolysis chamber with the electrolysis power supply. The current passes through and reaches the corresponding main electrolysis electrode and auxiliary electrode, and an oxidation-reduction reaction is generated on the electrode. Since the resistance of the series terminals is small, the stability of the current can be guaranteed and the current interference between the electrodes can be minimized.

[0039] Please see Figure 2 and Figure 3 As shown, the ends of the inflow pipe 8 and the outflow pipe 10 are respectively provided with branch pipe 1 9 and branch pipe 2 11. Each branch pipe 1 9 and branch pipe 2 11 has several connecting pipes 12 that are inserted into the guide pipe 13. The outer surface of the guide pipe 13 is provided with a raised ring 15. The inner wall of the connecting pipe 12 is provided with a positioning ring groove 16 that rotates with the raised ring 15. In order to ensure the inflow and outflow of auxiliary electrolyte, the connecting pipes 12 on the branch pipe 1 9 and branch pipe 2 11 are inserted into the guide pipe 13 until the raised ring 15 is engaged in the positioning ring groove 16.

[0040] Please see Figure 2 and Figure 3As shown, the bottom of the connecting pipe 12 has two gaps 18, and the outer surface of the bottom of the connecting pipe 12 is provided with a clamping assembly 14 for bonding the connecting pipe 12 and the guide pipe 13 together. The clamping assembly 14 includes two clamping strips 19 sleeved on the surface of the connecting pipe 12. Adjacent clamping strips 19 are connected by a connecting cloth. The outer surface of the connecting pipe 12 is provided with a limiting strip 20 for locking the clamping strips 19. One end of the clamping strip 19 is provided with an adhesive strip 24, and the other end of the clamping strip 19 is provided with an adhesive strip 24. One end is provided with an adhesive strip 23 that is bonded to the adhesive mother strip 24. When installing the connecting pipe 12 and the guide pipe 13, the bottom of the connecting pipe 12 is folded outward by the two empty parts 18, so that the connecting pipe 12 can be easily fitted onto the outside of the guide pipe 13. After the connecting pipe 12 and the guide pipe 13 are fitted together, the clamping strip 19 is wrapped around the connecting pipe 12, and the adhesive strip 23 and the adhesive mother strip 24 are bonded together to tightly connect the connecting pipe 12 and the guide pipe 13 together. The connection is stable and avoids falling off.

[0041] Please see Figure 3 As shown, the outer surface of the connecting pipe 12 is provided with a bonding strip 17, and the surface of the bonding strip 17 is provided with a male fastener 22. The end of the limiting strip 20 is provided with a concealed fastener 21 that engages with the male fastener 22. The limiting strip 20 has a folding design. Before wrapping around the pressing strip 19, the limiting strip 20 is opened. During the process of wrapping around the pressing strip 19, the limiting strip 20 is folded, so that the concealed fastener 21 on the limiting strip 20 engages with the male fastener 22, and the pressing strip 19 is accommodated in the area of ​​the limiting strip 20.

[0042] Please see Figure 3 As shown, the surface of the guide tube 13 is provided with an auxiliary electrolyte inlet and outlet channel 35, and the surface of the guide tube 13 and below the raised ring 15 are provided with a plurality of flute-shaped circular holes 34. The plurality of flute-shaped circular holes 34 increase in size from top to bottom. The gradually increasing diameter of the flute holes from top to bottom is to balance the liquid flow pressure, stabilize the flow, and avoid the generation of eddies that cause excessive local concentration difference, thereby avoiding the generation of excessive overvoltage. The guide tube 13 realizes the entry and exit of the auxiliary electrolyte, and the channel 35 is used to assist the flow of the electrolyte.

[0043] Please see Figure 5 As shown, the auxiliary electrode electrolysis chamber includes a plastic shell 31. An ion membrane 32 is installed on both sides of the plastic shell 31, and the bottom of the plastic shell 31 is solid. The ion membrane 32 isolates the anode and cathode regions and is used for the permeation of electrolytic ions to reduce losses. A sealing cover plate 28 is fixedly attached to the top surface of the plastic shell 31. The bottom surface of the sealing cover plate 28 abuts against the surface of the main electrode electrolysis flow tank 6, so as to realize the snap-fit ​​of the auxiliary electrode electrolysis chamber on the main electrode electrolysis flow tank 6.

[0044] Please see Figure 1As shown, the present invention also provides a series system of a bidirectional flow electrolyzer, including a plurality of main electrode electrolytic flow cells 6. Two adjacent main electrode electrolytic flow cells 6 are connected in series via mating mounting bases 25. Each of the two end main electrode electrolytic flow cells 6 is connected to a connecting shell 4. An electrolyte inlet 5 is installed on the surface of one connecting shell 4, and an electrolyte outlet 7 is installed on the surface of the other connecting shell 4. By connecting multiple main electrode electrolytic flow cells 6 in series, bidirectional flow electrolysis is achieved, greatly increasing the volume of the electrolyzer. Furthermore, the main electrode electrolytic flow cells 6 of the entire series system are completely connected. Because the cross-sectional area of ​​the main electrode electrolysis flow channel 6 is more than 5 times that of the electrolyte flow channel, the flow rate of the electrolyte becomes slower after it flows into the main electrode electrolysis flow channel 6. Since the pressure of the entire main electrode electrolysis flow channel 6 is balanced and no eddies are generated, the electrolyte takes a relatively long time to flow through the main electrode electrolysis flow channel 6. The electrolyte undergoes repeated electrolysis each time it passes through a section of the main electrode electrolysis flow channel 6, so that the electrolysis reaction is more complete. This can achieve the electrolysis effect of the fixed main electrode electrolysis flow channel 6, which not only achieves the current efficiency of the traditional electrolysis cell, but also greatly improves the wastewater treatment capacity.

[0045] In use, this invention first connects multiple main electrode electrolytic flow cells 6 in series to achieve bidirectional flow electrolysis, greatly increasing the volume of the electrolytic cell. Furthermore, the main electrode electrolytic flow cells 6 in the entire series system are completely interconnected. Since the cross-sectional area of ​​the main electrode electrolytic flow cell 6 is more than five times that of the electrolyte flow pipe, the flow rate slows down after the electrolyte flows into the main electrode electrolytic flow cell 6. Because the pressure in the entire main electrode electrolytic flow cell 6 is balanced, no eddies are generated, so the electrolyte takes a relatively long time to flow through the main electrode electrolytic flow cell 6. Each time the electrolyte passes through a section of the main electrode electrolytic flow cell 6, it undergoes repeated electrolysis, ensuring a more complete electrolysis reaction and enabling continuous flow electrolysis, thus improving the wastewater treatment capacity of the electrolysis technology.

[0046] By folding the bottom of the two missing parts 18 outwards, the connecting pipe 12 can be easily fitted onto the outside of the guide pipe 13. After the connecting pipe 12 and the guide pipe 13 are fitted together, the clamping strip 19 is wrapped around the connecting pipe 12 and the limiting strip 20 is folded over so that the hidden snap head 21 on the limiting strip 20 is engaged with the male snap seat 22, and the clamping strip 19 is accommodated in the area of ​​the limiting strip 20. The connecting pipe 12 and the guide pipe 13 are tightly connected together by the adhesive strip 23 and the adhesive strip 24. The connection is stable and avoids falling off.

[0047] The auxiliary electrolyte in the auxiliary electrolyte storage tank 2 is fed into several auxiliary electrode electrolysis chambers through the inflow pipe 8, and the auxiliary electrolyte is discharged into the auxiliary electrolyte storage tank 3 through the outflow pipe 10. It then re-enters the auxiliary electrolyte storage tank 2 through the output of the circulation pump 33, thus realizing cyclic electrolysis.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A bidirectional flow electrolytic cell, comprising a main electrode electrolytic flow cell (6), characterized in that: The main electrode electrolysis flow tank (6) includes an electrolysis tank shell. Several insertion slots (27) for the auxiliary electrode electrolysis chambers are provided on the top surface of the electrolysis tank shell. Mounting bases (25) are fixed to both ends of the electrolysis tank shell. Multiple insertion slots (27) are arranged in parallel. Main electrode flow electrolysis chambers (26) are provided inside the electrolysis tank shell and at both ends of adjacent auxiliary electrode electrolysis chambers. Two guide pipes (13) for auxiliary electrolyte inlet and outlet are installed on the top surface of each auxiliary electrode electrolysis chamber. Two rows of guide pipes (13) perpendicular to the direction of the main electrode flow electrolysis chambers (26) are also provided. 3) The inlet pipe (8) and outlet pipe (10) for auxiliary electrolyte inflow and outflow are respectively connected. The ends of the inlet pipe (8) and outlet pipe (10) are respectively connected to auxiliary electrolyte storage tank one (2) and auxiliary electrolyte storage tank two (3). The auxiliary electrolyte storage tank one (2) and auxiliary electrolyte storage tank two (3) are set in the support frame (1). The side of the support frame (1) is equipped with a circulation pump (33) connected to the outlet of the auxiliary electrolyte storage tank two (3). The outlet end of the circulation pump (33) is connected to the inlet end of the auxiliary electrolyte storage tank one (2). The ends of the inflow pipe (8) and the outflow pipe (10) are respectively provided with a branch pipe one (9) and a branch pipe two (11). Each of the branch pipe one (9) and the branch pipe two (11) has a plurality of connecting pipes (12) that are inserted into the guide pipe (13). The outer surface of the guide pipe (13) is provided with a raised ring strip (15), and the inner wall of the connecting pipe (12) is provided with a positioning ring groove (16) that rotates with the raised ring strip (15). The bottom of the connecting tube (12) is provided with two gaps (18), and the bottom outer surface of the connecting tube (12) is provided with a clamping assembly (14) for bonding the connecting tube (12) and the guide tube (13) together. The clamping assembly (14) includes two clamping strips (19) sleeved on the surface of the connecting tube (12). Two adjacent clamping strips (19) are connected by a connecting cloth. The outer surface of the connecting tube (12) is provided with a limiting strip (20) for locking the clamping strips (19). One end of the clamping strip (19) is provided with an adhesive mother strip (24), and the other end of the clamping strip (19) is provided with an adhesive daughter strip (23) bonded to the adhesive mother strip (24). The outer surface of the connecting pipe (12) is provided with a bonding strip (17), the surface of the bonding strip (17) is provided with a male fastener (22), and the end of the limiting strip (20) is provided with a concealed fastener (21) that engages with the male fastener (22). Several terminals 1 (29) are installed on the top surface of the main electrode electrolysis flow tank (6) and above the main electrode flow electrolysis chamber (26). Several terminals 2 (30) are installed on the top surface of the auxiliary electrode electrolysis chamber. The leads of the main electrolysis electrode are all connected to the anode of the electrolysis power supply, and the leads of the auxiliary electrode are all connected to the cathode of the electrolysis power supply. Alternatively, the leads of the main electrolysis electrodes are all connected to the cathode of the electrolysis power supply, and the leads of the auxiliary electrodes are all connected to the anode of the electrolysis power supply. The auxiliary electrode electrolysis chamber includes a plastic shell (31), on which ion membranes (32) are installed on both sides, and a sealing cover plate (28) is fixed on the top surface of the plastic shell (31), with the bottom surface of the sealing cover plate (28) abutting against the surface of the main electrode electrolysis flow tank (6).

2. The bidirectional flow electrolytic cell according to claim 1, characterized in that, The surface of the guide tube (13) is provided with an auxiliary electrolyte inlet and outlet channel (35), and the surface of the guide tube (13) and below the raised ring (15) are provided with a plurality of flute-shaped round holes (34), which increase in size from top to bottom.

3. The series system of a bidirectional flow electrolyzer according to claim 2, characterized in that, It includes several main electrode electrolytic flow channels (6), and two adjacent main electrode electrolytic flow channels (6) are connected together in series by fitting mounting bases (25). The two main electrode electrolytic flow channels (6) at the ends are connected to connecting shells (4). An electrolyte inlet (5) is installed on the surface of one of the connecting shells (4), and an electrolyte outlet (7) is installed on the surface of the other connecting shell (4).

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