Automatic control type electrolysis system

Abstract

The utility model relates to an automatic control type electrolysis system, which belongs to the technical field of electrolysis, and comprises an electrolysis unit, an electrolyte supply unit, an electrolyte discharge unit and a gas discharge unit, the electrolyte supply unit is used for conveying catholyte and anolyte to the electrolysis unit, chlorine gas and hydrogen gas are generated after electrolysis of the electrolysis unit, and the gas discharge unit is used for discharging the chlorine gas and the hydrogen gas. The chlorine and the hydrogen are discharged through the gas discharge unit, the electrolyzed electrolyte is discharged through the electrolyte discharge unit, and the gas discharge unit comprises a hydrogen discharge part and a chlorine discharge part. In the power-on driving process of the electrolytic bath, one-key driving is realized, the whole system does not need human intervention, dangers or harms possibly caused by unsafe behaviors of people are reduced, the number of operators is reduced, the efficiency is improved, and meanwhile, the pressure can be controlled to be more stable.

Description

Technical Field

[0001] The utility model relates to an automatic control electrolysis system, belonging to the technical field of electrolysis. Background Art

[0002] Electrolysis is the process of passing an electric current through an electrolyte solution or a molten electrolyte to induce redox reactions at the cathode and anode.

[0003] The utility model patent with announcement number CN211420325U discloses a single-tank process pipeline for an electrolytic cell, which includes an electrolytic cell, wherein two cathode discharge pipe joints are arranged on the top of the electrolytic cell, an anode discharge pipe joint is arranged on each of the left and right ends of the top of the electrolytic cell, two cathode feed pipe joints are arranged in the middle position of the bottom of the electrolytic cell, and an anode feed pipe joint is arranged on each of the left and right ends of the bottom of the electrolytic cell, a cathode discharge pipe joint is connected to a cathode discharge hose, the other end of the cathode discharge hose is connected to a cathode discharge main pipe, an anode discharge pipe joint is connected to an anode discharge hose, the other end of the anode discharge hose is connected to the anode discharge main pipe, a cathode feed pipe joint is connected to a cathode feed hose, the other end of the cathode feed hose is connected to the cathode feed main pipe, an anode feed pipe joint is connected to an anode feed hose, and the other end of the anode feed hose is connected to the anode feed main pipe. The utility model ensures the balance of system pressure. However, in the prior art, the method for starting and stopping the electrolytic cell is manual DCS (DCS refers to distributed control system, which is the abbreviation of Distributed Control System. It is a new generation of instrument control system that adopts the design principle of decentralized control functions, centralized display operations, and taking into account the design principles of division and autonomy and comprehensive coordination). The electrolytic device is manually started in cooperation with the on-site operator. Due to the unreliable behavior of people and the difference in operation level, as well as the untimely communication or misunderstanding between the on-site and DCS room, the start-up and shutdown failures or serious production accidents are often caused.

[0004] Therefore, there is a need for an automatic control electrolysis system to achieve automatic control, avoid human intervention, and improve safety. Summary of the invention

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, to provide an automatic control type electrolysis system which realizes automatic control, avoids human intervention and improves safety.

[0006] The technical solution adopted by the utility model to solve the above problems is: an automatic control electrolysis system, comprising an electrolysis unit, an electrolyte supply unit, an electrolyte discharge unit and a gas discharge unit, wherein the electrolyte supply unit is used to transport cathode liquid and anode liquid to the electrolysis unit, and chlorine and hydrogen are generated after electrolysis by the electrolysis unit, and the chlorine and hydrogen are discharged through the gas discharge unit, while the electrolyte after electrolysis is discharged through the electrolyte discharge unit, and the gas discharge unit includes a hydrogen discharge component and a chlorine discharge component;

[0007] The hydrogen discharge component includes a first gas-liquid separator, a first hydrogen pipe and a second hydrogen pipe, the two ends of the first hydrogen pipe are respectively connected to the electrolysis unit and the first gas-liquid separator, the first hydrogen pipe is connected to a first pressure transmitter, the second hydrogen pipe is connected to the first gas-liquid separator, the second hydrogen pipe is connected to a hydrogen shut-off valve and a first hydrogen regulating valve, the hydrogen shut-off valve and the first hydrogen regulating valve are arranged along the flow direction of hydrogen in the second hydrogen pipe, the second hydrogen pipe is connected to a hydrogen vent pipe, the connection between the hydrogen vent pipe and the second hydrogen pipe is located between the hydrogen shut-off valve and the first hydrogen regulating valve, and the hydrogen vent pipe is provided with a second hydrogen regulating valve;

[0008] The chlorine gas discharge component includes a second gas-liquid separator, a first chlorine gas pipe and a second chlorine gas pipe, the two ends of the first chlorine gas pipe are respectively connected to the electrolysis unit and the second gas-liquid separator, the first chlorine gas pipe is connected to a second pressure transmitter, the second chlorine gas pipe is connected to the second gas-liquid separator, the second chlorine gas pipe is connected to a chlorine gas cut-off valve and a first chlorine gas regulating valve, the chlorine gas cut-off valve and the first chlorine gas regulating valve are arranged along the flow direction of chlorine in the second chlorine gas pipe, the second chlorine gas pipe is connected to a chlorine gas absorption pipe, the connection between the chlorine gas absorption pipe and the second chlorine gas pipe is located between the second gas-liquid separator and the chlorine gas cut-off valve, and the chlorine gas absorption pipe is provided with a second chlorine gas regulating valve;

[0009] The gas exhaust unit also includes an exhaust nitrogen main pipe and two exhaust nitrogen branch pipes. Among the two exhaust nitrogen branch pipes, two ends of one exhaust nitrogen branch pipe are respectively connected to the second hydrogen pipe and the exhaust nitrogen main pipe, and two ends of the other exhaust nitrogen branch pipe are respectively connected to the second chlorine pipe and the exhaust nitrogen main pipe. The two exhaust nitrogen branch pipes are connected to the same end of the exhaust nitrogen main pipe. The connection between the second hydrogen pipe and the exhaust nitrogen branch pipe is located between the first hydrogen cut-off valve and the first gas-liquid separator. The connection between the second chlorine pipe and the exhaust nitrogen branch pipe is located between the chlorine absorption pipe and the second gas-liquid separator. The exhaust nitrogen branch pipe connected to the second hydrogen pipe is provided with a first nitrogen regulating valve, the exhaust nitrogen branch pipe connected to the second chlorine pipe is provided with a second nitrogen regulating valve, and the exhaust nitrogen main pipe is provided with a nitrogen cut-off valve.

[0010] Preferably, the electrolysis unit comprises an electrolytic cell, a cathode input tube, an anode input tube, a cathode output tube, an anode output tube, a cathode input hose, an anode input hose, a cathode output hose and an anode output hose, the electrolytic cell is connected to the cathode input tube via the cathode input hose, the electrolytic cell is connected to the anode input tube via the anode input hose, the electrolytic cell is connected to the cathode output tube via the cathode output hose, the electrolytic cell is connected to the anode output tube via the anode output hose, the two ends of the first hydrogen pipe are respectively connected to the cathode output tube and the first gas-liquid separator, and the two ends of the first chlorine pipe are respectively connected to the anode output tube and the second gas-liquid separator.

[0011] Preferably, two ends of the electrolytic cell are connected to a working oil injection device and a working oil recovery device respectively.

[0012] Preferably, the electrolyte supply unit comprises a cathode liquid supply component and an anode liquid supply component, the cathode liquid supply component is connected to the cathode input pipe, and the anode liquid supply component is connected to the anode input pipe.

[0013] Preferably, the hydrogen exhaust component further includes a caustic soda exhaust pipe, and the first gas-liquid separator is connected to the cathode liquid supply component via the caustic soda exhaust pipe.

[0014] Preferably, the chlorine gas discharge component further comprises a brine discharge pipe, and the second gas-liquid separator is connected to the anolyte supply component via the brine discharge pipe.

[0015] Preferably, the electrolyte discharge unit comprises a cathode liquid discharge pipe, an anode liquid discharge pipe and a drainage pit, wherein both ends of the cathode liquid discharge pipe are respectively connected to the electrolysis unit and the drainage pit, and both ends of the anode liquid discharge pipe are respectively connected to the electrolysis unit and the drainage pit.

[0016] Preferably, an anolyte reflux pipe is provided on the anolyte discharge pipe, and two ends of the anolyte reflux pipe are respectively connected to the anolyte discharge pipe and the electrolysis unit.

[0017] Preferably, the cathode liquid discharge pipe is connected to a cathode liquid discharge nitrogen pipe, and a cathode liquid nitrogen cut-off valve is provided on the cathode liquid discharge nitrogen pipe; and the anode liquid discharge pipe is connected to an anode liquid discharge nitrogen pipe, and an anode liquid nitrogen cut-off valve is provided on the anode liquid discharge nitrogen pipe.

[0018] Preferably, a limiting flow orifice plate is provided on both the cathode liquid nitrogen discharge pipe and the anode liquid nitrogen discharge pipe.

[0019] Compared with the prior art, the advantages of the utility model are:

[0020] The utility model discloses an automatic control electrolysis system. During the process of power supply and start-up of the electrolytic cell, one-key start-up is realized. The whole system does not need human intervention, thus reducing the danger or harm that may be caused by unsafe human behavior, reducing the number of operating manpower, improving efficiency, and being able to control the pressure more steadily. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of an automatic control electrolysis system of the utility model;

[0022] Figure 2 is a schematic diagram of the structure of an electrolysis unit;

[0023] Figure 3 is a structural schematic diagram of an electrolyte discharge unit;

[0024] Figure 4 for Figure 3 A magnified view of part A;

[0025] Figure 5 Schematic diagram of the structure of the gas exhaust unit.

[0026] in:

[0027] Electrolysis unit 1, electrolyte supply unit 2, electrolyte discharge unit 3, gas discharge unit 4;

[0028] Electrolytic cell 11, cathode input tube 12, anode input tube 13, cathode output tube 14, anode output tube 15, cathode input hose 16, anode input hose 17, cathode output hose 18, anode output hose 19;

[0029] Cathodic liquid supply component 21, anodic liquid supply component 22;

[0030] cathode liquid discharge pipe 31, anode liquid discharge pipe 32, drainage pit 33, anode liquid reflux pipe 34, cathode liquid nitrogen discharge pipe 35, cathode liquid nitrogen cut-off valve 36, anode liquid nitrogen discharge pipe 37, anode liquid nitrogen cut-off valve 38, flow limiting orifice plate 39;

[0031] A hydrogen discharge component 41, a chlorine discharge component 42, an exhaust nitrogen main pipe 43, an exhaust nitrogen branch pipe 44, a first nitrogen regulating valve 45, a second nitrogen regulating valve 46, and a nitrogen shut-off valve 47;

[0032] A first gas-liquid separator 411, a first hydrogen pipe 412, a second hydrogen pipe 413, a first pressure transmitter 414, a hydrogen cut-off valve 415, a first hydrogen regulating valve 416, a hydrogen vent pipe 417, a second hydrogen regulating valve 418, and a caustic soda discharge pipe 419;

[0033] A second gas-liquid separator 421 , a first chlorine pipe 422 , a second chlorine pipe 423 , a second pressure transmitter 424 , a chlorine cut-off valve 425 , a first chlorine regulating valve 426 , a chlorine absorption pipe 427 , a second chlorine regulating valve 428 , and a brine discharge pipe 429 . DETAILED DESCRIPTION

[0034] like Figure 1-5 As shown, an automatic control electrolysis system in this embodiment includes an electrolysis unit 1, an electrolyte supply unit 2, an electrolyte discharge unit 3 and a gas discharge unit 4, wherein the electrolyte supply unit 2 is used to transport cathode liquid and anode liquid to the electrolysis unit 1, and chlorine and hydrogen are generated after electrolysis by the electrolysis unit 1, and the chlorine and hydrogen are discharged through the gas discharge unit 4, and the electrolyte after electrolysis is discharged through the electrolyte discharge unit 3;

[0035] The electrolysis unit 1 comprises an electrolytic cell 11, a cathode input tube 12, an anode input tube 13, a cathode output tube 14, an anode output tube 15, a cathode input hose 16, an anode input hose 17, a cathode output hose 18 and an anode output hose 19, wherein the electrolytic cell 11 is connected to the cathode input tube 12 via the cathode input hose 16, the electrolytic cell 11 is connected to the anode input tube 13 via the anode input hose 17, the electrolytic cell 11 is connected to the cathode output tube 14 via the cathode output hose 18, the electrolytic cell 11 is connected to the anode output tube 15 via the anode output hose 19, a water supply device is connected to the electrolytic cell 11, water is transported into the electrolytic cell 11 via the water supply device, and both ends of the electrolytic cell 11 are respectively connected to a working oil injection device and a working oil recovery device, through which the working oil injection device and the working oil recovery device are connected. The oil recovery device drives the movement of each single tank on the electrolytic cell 11. During electrolysis, the water supply device transports water to the electrolytic cell 11. At the same time, the cathode liquid is transported to the electrolytic cell 11 from the cathode input pipe 12 and the cathode input hose 16 in sequence, and the cathode liquid is transported to the electrolytic cell 11 from the anode input pipe 13 and the anode input hose 17 in sequence. The hydrogen produced by electrolysis is transported to the gas discharge unit 4 through the cathode output hose 18 and the cathode output pipe 14 in sequence, and the chlorine produced by electrolysis is transported to the gas discharge unit 4 through the anode output hose 19 and the anode output pipe 15 in sequence. The cathode liquid after electrolysis is transported to the electrolyte discharge unit 3 through the cathode output hose 18 and the cathode output pipe 14 in sequence, and the anode liquid after electrolysis is transported to the electrolyte discharge unit 3 through the anode output hose 19 and the anode output pipe 15 in sequence;

[0036] The electrolyte supply unit 2 includes a cathode liquid supply component 21 and an anode liquid supply component 22, wherein the cathode liquid supply component 21 is connected to the cathode input pipe 12, and the cathode liquid is transported to the cathode input pipe 12 through the cathode liquid supply component 21, and the anode liquid supply component 22 is connected to the anode input pipe 13, and the anode liquid is transported to the anode input pipe 13 through the anode liquid supply component 22;

[0037] The electrolyte discharge unit 3 comprises a cathode liquid discharge pipe 31, an anode liquid discharge pipe 32 and a drainage pit 33. The two ends of the cathode liquid discharge pipe 31 are respectively connected to the cathode output pipe 14 and the drainage pit 33. The two ends of the anode liquid discharge pipe 32 are respectively connected to the anode output pipe 15 and the drainage pit 33. The cathode liquid after electrolysis is sequentially transported to the drainage pit 33 through the cathode output hose 18, the cathode output pipe 14 and the cathode liquid discharge pipe 31. The anode liquid after electrolysis is sequentially transported to the drainage pit 33 through the anode output hose 19, the anode output pipe 15 and the anode liquid discharge pipe 32.

[0038] The anolyte discharge pipe 32 is provided with an anolyte return pipe 34, and both ends of the anolyte return pipe 34 are respectively connected to the anolyte discharge pipe 32 and the anode input pipe 13, so that a part of the anolyte in the anolyte discharge pipe 32 is returned to the anode input pipe 13 through the anolyte return pipe 34, so as to realize the recycling of the anolyte;

[0039] The cathode liquid discharge pipe 31 is connected to a cathode liquid discharge nitrogen pipe 35, and a cathode liquid nitrogen cut-off valve 4736 is provided on the cathode liquid discharge nitrogen pipe 35. The anode liquid discharge pipe 32 is connected to an anode liquid discharge nitrogen pipe 37, and an anode liquid discharge nitrogen cut-off valve 4738 is provided on the anode liquid discharge nitrogen pipe 37. When the system is stopped, the cathode liquid discharge nitrogen pipe 35 and the anode liquid discharge nitrogen pipe 37 discharge nitrogen to achieve a protective effect.

[0040] The cathode liquid nitrogen discharge pipe 35 and the anode liquid nitrogen discharge pipe 37 are both provided with a limiting flow orifice plate 39;

[0041] The gas exhaust unit 4 includes a hydrogen exhaust component 41 and a chlorine exhaust component 42, wherein the hydrogen exhaust component 41 is connected to the cathode output pipe 14, and the chlorine exhaust component 42 is connected to the anode output pipe 15;

[0042] The hydrogen discharge component 41 includes a first gas-liquid separator 411, a first hydrogen pipe 412 and a second hydrogen pipe 413, the two ends of the first hydrogen pipe 412 are respectively connected to the cathode output pipe 14 and the first gas-liquid separator 411, the first hydrogen pipe 412 is connected to a first pressure transmitter 414, the second hydrogen pipe 413 is connected to the first gas-liquid separator 411, the second hydrogen pipe 413 is connected to a hydrogen shut-off valve 415 and a first hydrogen regulating valve 416, the hydrogen shut-off valve 415 and the first hydrogen regulating valve 416 are arranged along the flow direction of hydrogen in the second hydrogen pipe 413, the second hydrogen pipe 413 is connected to a hydrogen vent pipe 417, the connection between the hydrogen vent pipe 417 and the second hydrogen pipe 413 is located between the hydrogen shut-off valve 415 and the first hydrogen regulating valve 416, and the hydrogen vent pipe 417 is provided with a second hydrogen regulating valve 418;

[0043] The hydrogen discharge component 41 further includes a caustic soda discharge pipe 419, and the first gas-liquid separator 411 is connected to the cathode liquid supply component 21 through the caustic soda discharge pipe 419;

[0044] The hydrogen discharged from the cathode output pipe 14 is transported to the first gas-liquid separator 411 through the first hydrogen pipe 412. The residual cathode liquid in the hydrogen is separated and discharged by the first gas-liquid separator 411. The discharged cathode liquid flows back to the cathode liquid supply component 21 through the caustic soda discharge pipe 419. The separated hydrogen enters the second hydrogen pipe 413. According to actual work needs, the hydrogen in the second hydrogen pipe 413 is directly discharged or discharged from the hydrogen vent pipe 417.

[0045] The chlorine gas discharge component 42 includes a second gas-liquid separator 421, a first chlorine gas pipe 422 and a second chlorine gas pipe 423, wherein both ends of the first chlorine gas pipe 422 are respectively connected to the anode output pipe 15 and the second gas-liquid separator 421, the first chlorine gas pipe 422 is connected to a second pressure transmitter 424, the second chlorine gas pipe 423 is connected to the second gas-liquid separator 421, the second chlorine gas pipe 423 is connected to a chlorine gas cut-off valve 425 and a first chlorine gas regulating valve 426, the chlorine gas cut-off valve 425 and the first chlorine gas regulating valve 426 are arranged along the flow direction of chlorine in the second chlorine gas pipe 423, the second chlorine gas pipe 423 is connected to a chlorine gas absorption pipe 427, the connection between the chlorine gas absorption pipe 427 and the second chlorine gas pipe 423 is located between the second gas-liquid separator 421 and the chlorine gas cut-off valve 425, and the chlorine gas absorption pipe 427 is provided with a second chlorine gas regulating valve 428;

[0046] The chlorine gas discharge component 42 further includes a brine discharge pipe 429, and the second gas-liquid separator 421 is connected to the anolyte supply component 22 via the brine discharge pipe 429;

[0047] The chlorine gas discharged from the anode output pipe 15 is transported to the second gas-liquid separator 421 through the first chlorine pipe 422. The residual anolyte in the chlorine gas is separated and discharged by the second gas-liquid separator 421. The discharged anolyte flows back to the anolyte supply component 22 through the brine discharge pipe 429. The separated chlorine gas enters the second chlorine pipe 423. According to actual work needs, the chlorine gas in the second chlorine pipe 423 is discharged directly or discharged from the chlorine absorption pipe 427.

[0048] The gas exhaust unit 4 further includes an exhaust nitrogen main pipe 43 and two exhaust nitrogen branch pipes 44. Of the two exhaust nitrogen branch pipes 44, two ends of one exhaust nitrogen branch pipe 44 are respectively connected to the second hydrogen pipe 413 and the exhaust nitrogen main pipe 43, and two ends of the other exhaust nitrogen branch pipe 44 are respectively connected to the second chlorine pipe 423 and the exhaust nitrogen main pipe 43. The two exhaust nitrogen branch pipes 44 are connected to the same end of the exhaust nitrogen main pipe 43. The second hydrogen pipe 413 and the exhaust nitrogen branch pipe 44 are respectively connected to each other. The connection is located between the first hydrogen shut-off valve 415 and the first gas-liquid separator 411, the connection between the second chlorine pipe 423 and the exhaust nitrogen branch pipe 44 is located between the chlorine absorption pipe 427 and the second gas-liquid separator 421, the exhaust nitrogen branch pipe 44 connected to the second hydrogen pipe 413 is provided with a first nitrogen regulating valve 45, the exhaust nitrogen branch pipe 44 connected to the second chlorine pipe 423 is provided with a second nitrogen regulating valve 46, and the exhaust nitrogen main pipe 43 is provided with a nitrogen shut-off valve 47;

[0049] When the gas exhaust unit 4 is working, it is specifically divided into the following situations:

[0050] 1. After the electrolytic cell 11 is filled with liquid, the electrolyte circulation begins, and the subsequent operations are controlled by the DCS;

[0051] 2. When the first tank is started, the second hydrogen regulating valve 418 on the hydrogen venting pipe 417 and the first chlorine regulating valve 426 on the second chlorine pipe 423 are directly adjusted according to the pressure values ​​detected by the first pressure transmitter 414 and the second pressure transmitter 424. In fact, the second hydrogen pipe 413 and the second chlorine pipe 423 are respectively provided with a pressure regulating system, which cooperates with the pressure regulating systems on the second hydrogen pipe 413 and the second chlorine pipe 423 to control the pressure of the entire system;

[0052] 3. When part of the electrolytic cells 11 in the system have been started and it is necessary to connect the cells that have been started to the grid, the hydrogen shut-off valve 415 and the chlorine shut-off valve 425 of the chlorine-hydrogen gas main are closed, and the nitrogen shut-off valve 47 is opened;

[0053] When the electrolytic cell 11 needs to be pressurized, in fact, a pressure regulating system and a water seal are provided on the exhaust nitrogen main pipe 43. The pressure is ensured by the pressure regulating system and the water seal. The pressure is monitored by the first pressure transmitter 414 and the second pressure transmitter 424. When the pressure exceeds the specified value, the hydrogen shut-off valve 415 and the second hydrogen regulating valve 418 or the chlorine shut-off valve 425 and the second chlorine regulating valve 428 are opened, and a certain pressure is released according to the program setting to avoid damage to the electrolytic cell 11. Then, power is supplied, the hydrogen shut-off valve 415 and the first hydrogen regulating valve 416 are opened, and the chlorine shut-off valve 425 and the first chlorine regulating valve 426 are opened to achieve grid connection;

[0054] During the grid connection process, if the pressure difference of a single tank is abnormal and exceeds the set value, the second hydrogen regulating valve 418 or the second chlorine regulating valve 428 is opened to release the pressure. The openings of the second hydrogen regulating valve 418 and the second chlorine regulating valve 428 have given set values ​​according to the pressure. When the pressure returns to the normal value, the second hydrogen regulating valve 418 and the second chlorine regulating valve 428 are closed at a given rate.

[0055] When a single tank is stopped, the cathode liquid nitrogen cut-off valve 4736 and the first anode liquid nitrogen cut-off valve 4738 are opened, the first hydrogen regulating valve 416 is closed, the second hydrogen regulating valve 418 is opened, the first chlorine regulating valve 426 is closed, and the second chlorine regulating valve 428 is opened, so that the chlorine is detoxified and the hydrogen is vented, and the pressure gradually maintains the pressure difference and decreases according to the set program;

[0056] When the whole system is shut down, the pressure and differential pressure are set by the program, and the first hydrogen regulating valve 416 and the first chlorine regulating valve 426 are directly regulated and gradually closed;

[0057] In summary, during the power supply and start-up process of the electrolytic cell 11, one-button start-up is achieved, and the entire system does not require human intervention, which reduces the danger or harm that may be caused by unsafe human behavior, reduces the number of operating manpower, improves efficiency, and can control the pressure more steadily.

[0058] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An automatic control electrolysis system, comprising an electrolysis unit (1), an electrolyte supply unit (2), an electrolyte discharge unit (3) and a gas discharge unit (4), wherein the electrolyte supply unit (2) is used to transport cathode liquid and anode liquid to the electrolysis unit (1), and chlorine and hydrogen are generated after electrolysis by the electrolysis unit (1), and the chlorine and hydrogen are discharged through the gas discharge unit (4), and the discharge unit (3) is used to discharge the electrolyte after electrolysis, characterized in that: The gas discharge unit (4) comprises a hydrogen discharge component (41) and a chlorine discharge component (42); The hydrogen discharge component (41) comprises a first gas-liquid separator (411), a first hydrogen pipe (412) and a second hydrogen pipe (413); both ends of the first hydrogen pipe (412) are respectively connected to the electrolysis unit (1) and the first gas-liquid separator (411); the first hydrogen pipe (412) is connected to a first pressure transmitter (414); the second hydrogen pipe (413) is connected to the first gas-liquid separator (411); and the second hydrogen pipe (413) is connected to a hydrogen shut-off valve (415). and a first hydrogen regulating valve (416), the hydrogen shut-off valve (415) and the first hydrogen regulating valve (416) being arranged along the flow direction of hydrogen in the second hydrogen pipe (413), the second hydrogen pipe (413) being connected to a hydrogen vent pipe (417), the connection between the hydrogen vent pipe (417) and the second hydrogen pipe (413) being located between the hydrogen shut-off valve (415) and the first hydrogen regulating valve (416), and the hydrogen vent pipe (417) being provided with a second hydrogen regulating valve (418); The chlorine gas discharge component (42) comprises a second gas-liquid separator (421), a first chlorine gas pipe (422) and a second chlorine gas pipe (423); the two ends of the first chlorine gas pipe (422) are respectively connected to the electrolysis unit (1) and the second gas-liquid separator (421); the first chlorine gas pipe (422) is connected to a second pressure transmitter (424); the second chlorine gas pipe (423) is connected to the second gas-liquid separator (421); the second chlorine gas pipe (423) is connected to a chlorine gas shut-off valve (425); ) and a first chlorine regulating valve (426), the chlorine shut-off valve (425) and the first chlorine regulating valve (426) being arranged along the flow direction of chlorine in the second chlorine pipe (423), the second chlorine pipe (423) being connected to a chlorine absorption pipe (427), the connection between the chlorine absorption pipe (427) and the second chlorine pipe (423) being located between the second gas-liquid separator (421) and the chlorine shut-off valve (425), and the chlorine absorption pipe (427) being provided with a second chlorine regulating valve (428); The gas exhaust unit (4) further comprises an exhaust nitrogen main pipe (43) and two exhaust nitrogen branch pipes (44); two ends of one of the two exhaust nitrogen branch pipes (44) are respectively connected to the second hydrogen pipe (413) and the exhaust nitrogen main pipe (43); two ends of the other exhaust nitrogen branch pipe (44) are respectively connected to the second chlorine pipe (423) and the exhaust nitrogen main pipe (43); the two exhaust nitrogen branch pipes (44) are connected to the same end of the exhaust nitrogen main pipe (43); the second hydrogen pipe (413) and the exhaust nitrogen branch pipe (44) are respectively connected to each other; The connection point is located between the first hydrogen shut-off valve (415) and the first gas-liquid separator (411); the connection point between the second chlorine pipe (423) and the exhaust nitrogen branch pipe (44) is located between the chlorine absorption pipe (427) and the second gas-liquid separator (421); the exhaust nitrogen branch pipe (44) connected to the second hydrogen pipe (413) is provided with a first nitrogen regulating valve (45); the exhaust nitrogen branch pipe (44) connected to the second chlorine pipe (423) is provided with a second nitrogen regulating valve (46); and the exhaust nitrogen main pipe (43) is provided with a nitrogen shut-off valve (47).

2. An automatic controlled electrolysis system according to claim 1, characterized in that: The electrolysis unit (1) comprises an electrolytic cell (11), a cathode input pipe (12), an anode input pipe (13), a cathode output pipe (14), an anode output pipe (15), a cathode input hose (16), an anode input hose (17), a cathode output hose (18) and an anode output hose (19); the electrolytic cell (11) is connected to the cathode input pipe (12) via the cathode input hose (16); the electrolytic cell (11) is connected to the anode input pipe (13) via the anode input hose (17); the electrolytic cell (11) is connected to the cathode output pipe (14) via the cathode output hose (18); the electrolytic cell (11) is connected to the anode output pipe (15) via the anode output hose (19); the first hydrogen pipe (412) has two ends connected to the cathode output pipe (14) and the first gas-liquid separator (411) respectively; the first chlorine pipe (422) has two ends connected to the anode output pipe (15) and the second gas-liquid separator (421) respectively.

3. An automatic controlled electrolysis system according to claim 2, characterized in that: The two ends of the electrolytic cell (11) are respectively connected to a working oil injection device and a working oil recovery device.

4. An automatic controlled electrolysis system according to claim 2, characterized in that: The electrolyte supply unit (2) comprises a cathode liquid supply component (21) and an anode liquid supply component (22); the cathode liquid supply component (21) is connected to the cathode input pipe (12), and the anode liquid supply component (22) is connected to the anode input pipe (13).

5. An automatic controlled electrolysis system according to claim 4, characterized in that: The hydrogen discharge component (41) further comprises a caustic soda discharge pipe (419), and the first gas-liquid separator (411) is connected to the cathode liquid supply component (21) via the caustic soda discharge pipe (419).

6. An automatic controlled electrolysis system according to claim 4, characterized in that: The chlorine gas discharge component (42) further comprises a brine discharge pipe (429), and the second gas-liquid separator (421) is connected to the anolyte supply component (22) via the brine discharge pipe (429).

7. An automatic controlled electrolysis system according to claim 1, characterized in that: The electrolyte discharge unit (3) comprises a cathode liquid discharge pipe (31), an anode liquid discharge pipe (32) and a drainage pit (33); two ends of the cathode liquid discharge pipe (31) are respectively connected to the electrolysis unit (1) and the drainage pit (33); and two ends of the anode liquid discharge pipe (32) are respectively connected to the electrolysis unit (1) and the drainage pit (33).

8. An automatic controlled electrolysis system according to claim 7, characterized in that: The anolyte discharge pipe (32) is provided with an anolyte return pipe (34), and both ends of the anolyte return pipe (34) are respectively connected to the anolyte discharge pipe (32) and the electrolysis unit (1).

9. An automatic controlled electrolysis system according to claim 7, characterized in that: The cathode liquid discharge pipe (31) is connected to a cathode liquid discharge nitrogen pipe (35), and a cathode liquid nitrogen cut-off valve (47) (36) is provided on the cathode liquid discharge nitrogen pipe (35). The anode liquid discharge pipe (32) is connected to an anode liquid discharge nitrogen pipe (37), and an anode liquid nitrogen cut-off valve (47) (38) is provided on the anode liquid discharge nitrogen pipe (37).

10. An automatic controlled electrolysis system according to claim 9, characterized in that: The cathode liquid nitrogen discharge pipe (35) and the anode liquid nitrogen discharge pipe (37) are both provided with a limiting flow orifice plate (39).

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