Equipment and method for preventing ionic membrane device from leaking in chlorine-containing sealing water recovery process

Abstract

The invention relates to the technical field of leakage prevention of ionic membrane electrolysis equipment, discloses equipment and a method for preventing leakage of an ionic membrane device in a chlorine-containing sealing water recovery process, solves the problem that the ionic membrane electrolysis equipment is easy to cause chlorine leakage, and comprises a combined equipment body and a master controller, the combined equipment body consists of a water-sealed tank, a gas-liquid inlet pipe, a negative pressure suction pipe, a negative pressure pump, a chlorine washing tower, a chlorine-containing water suction header pipe, a suction branch pipe I, a collection water pump I, a suction branch pipe II, a collection water pump II, chlorine-containing water recovery equipment, a water replenishing pipe and a water replenishing pump, and the water-sealed tank is connected with multiple paths of chlorine-containing sealing water through the gas-liquid inlet pipe; an isolation cover is fixedly arranged at the bottom end of one side in the water-sealed tank and divides the interior of the water-sealed tank into a water storage chamber and a temporary storage chamber. Through the equipment, chlorine leakage can be effectively prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of leakage prevention of ion membrane electrolysis equipment, and in particular relates to equipment and a method for preventing leakage of an ion membrane device during the recovery process of chlorine-containing sealed water. Background Art

[0002] The reaction product of the electrolysis process contains chlorine, which forms a gas-liquid mixture with the waste brine on the anode side and returns to the storage tank. To stabilize the pressure in the storage tank and the anode chlorine main pipe, the electrolysis process requires a water seal tank to seal the gas and achieve overpressure discharge. The water seal tank must maintain a certain level of overflow for a long time. When the chlorine pressure exceeds the liquid seal height, the chlorine will break through the water seal and be discharged along with the overflow water. In this case, an effective collection device is required to ensure the leakage prevention requirements of the ion membrane equipment. The technical difficulties of the collection device are as follows:

[0003] 1. High risk of leakage: Traditional water seal tanks are only passively sealed by liquid level height. Chlorine pressure fluctuations can easily break through the liquid seal, causing the mixture of chlorine-containing water and chlorine to leak out, corrode equipment and pollute the environment.

[0004] 2. Material corrosion problem: Ordinary materials such as carbon steel and stainless steel are prone to pitting corrosion and stress corrosion cracking in environments with high concentrations of Cl-, which shortens the life of pipelines and equipment. The average annual corrosion rate of connecting pipelines in existing devices reaches 0.5mm / a, which can easily lead to sealing failure accidents.

[0005] 3. Large fluctuations in process parameters: The amount of sealing water and the amount of chlorine carried out by the electrolysis device under different loads (low load, normal load, maximum load) vary significantly, and the existing system is difficult to dynamically adapt.

[0006] 4. The original chlorine-containing sealing water is directly discharged without entering the production system for recycling, resulting in low resource recovery efficiency. After testing, this part of the water contains 0.5-1.2% dissolved chlorine. Direct discharge results in an annual loss of about 15 tons of effective chlorine. Summary of the Invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a device and method for preventing leakage of an ion membrane device during the recovery of chlorine-containing sealed water, which effectively solves the problem that chlorine leakage is easily caused by ion membrane electrolysis equipment.

[0008] To achieve the above object, the present invention provides the following technical solution: a device for preventing leakage of an ion membrane device during the recovery of chlorine-containing sealed water, comprising a combined device body and a master controller, wherein the combined device body is composed of a water seal tank, a gas-liquid inlet pipe, a negative pressure suction pipe, a negative pressure pump, a chlorine scrubber, a chlorine-containing water suction main pipe, a suction branch pipe 1, a collection water pump 1, a suction branch pipe 2, a collection water pump 2, a chlorine-containing water recovery device, a water supply pipe and a water supply pump, the water seal tank is connected to multiple chlorine-containing sealed water channels through a gas-liquid inlet pipe, and a negative pressure pump is used. The suction pipe is connected between the water seal tank and the chlorine scrubber, the negative pressure pump is connected to the negative pressure suction pipe, the chlorine-containing water suction main pipe is connected to the bottom end of one side of the water seal tank, the suction branch pipe 1 and the suction branch pipe 2 are both fixedly connected to the other end of the chlorine-containing water suction main pipe, the collection water pump 1 is connected to the suction branch pipe 1, the collection water pump 2 is connected to the suction branch pipe 2, the chlorine-containing water recovery equipment is connected to the other end of the suction branch pipe 1 and the suction branch pipe 2, the water supply pipe is connected to one side of the water seal tank, and the water supply pump is connected to the water supply pipe;

[0009] An isolation cover is fixedly installed at the bottom end of one side of the water seal tank. The isolation cover divides the interior of the water seal tank into a water storage chamber and a temporary storage chamber. The chlorine-containing water suction main pipe passes through and is connected to the interior of the temporary storage chamber. A strip overflow port communicating with the water storage chamber and the temporary storage chamber is opened at the top of one side of the isolation cover. The interior of the water storage chamber is filled with liquid water, and the liquid water submerges the bottom of the gas-liquid inlet pipe.

[0010] Preferably, an air pressure sensor 1, a float magnetic flap level gauge 1 and a float magnetic flap level gauge 2 are provided through the top of the water seal tank, the bottom of the float magnetic flap level gauge 1 extends to the inside of the water storage chamber, and the float magnetic flap level gauge 2 extends to the inside of the temporary storage chamber.

[0011] Preferably, a U-shaped air pipe is provided through one side of the water seal tank, an aeration plate connected to the U-shaped air pipe is fixedly provided at the bottom end of the interior of the water seal tank, and an internal circulation air pump is provided on the U-shaped air pipe.

[0012] Preferably, a sight glass is fixedly provided on the top of one side of the water seal tank.

[0013] Preferably, the water seal tank is composed of a tank body and a top cover, the top cover is connected to the top of the tank body by bolts, an inner sealing ring and an outer sealing ring are arranged between the tank body and the top cover, and an annular positive pressure chamber is formed in the middle position of the connection between the tank body and the top cover, an air pressure sensor 2 is arranged inside the annular positive pressure chamber, a positive pressure sealing cover is arranged at the top of the top cover, and an air pressure sensor 3 is arranged inside the positive pressure sealing cover.

[0014] Preferably, a three-way positive pressure pipe communicating with the annular positive pressure chamber is provided between the positive pressure sealing cover and the top cover, and the other end of the three-way positive pressure pipe is connected to the positive pressure air pump.

[0015] Preferably, a sealing gasket is provided between the positive pressure sealing cover and the top cover, a sleeve matching the negative pressure suction tube is fixedly provided at the middle position of the top end of the positive pressure sealing cover, and two O-rings are provided inside the sleeve.

[0016] Preferably, an annular groove 1 is opened on the side of the top of the tank body, an elastic pressure ring 1 is arranged inside the annular groove 1, and an annular groove 2 is opened on the side of the bottom end of the top cover, an elastic pressure ring 2 is arranged inside the annular groove 2.

[0017] Preferably, the water seal tank, gas-liquid inlet pipe, negative pressure suction pipe, chlorine-containing water suction main pipe, suction branch pipe 1, suction branch pipe 2, water supply pipe, and chlorine-containing sealing water are all made of fiberglass-PVC composite material, the negative pressure pump, water collection pump 1, water collection pump 2, and internal circulation air pump are all made of titanium alloy, and the inner sealing ring, outer sealing ring, sealing gasket, and O-ring are all made of modified fluororubber + titanium-based coating material.

[0018] Preferably, the working method of the device for preventing leakage of the ion membrane device during the recovery process of the chlorine-containing sealing water comprises the following steps:

[0019] Step 1: Chlorine gas and chlorine-containing liquid enter the water seal tank through the gas-liquid inlet pipe. The liquid water inside the water storage chamber realizes the sealing effect. When the internal pressure of the gas-liquid inlet pipe increases, the gas-liquid mixture overflows.

[0020] Step 2: The negative pressure suction pipe and the negative pressure pump absorb the chlorine gas, so that the chlorine gas enters the interior of the chlorine scrubber for purification;

[0021] Step 3: As the liquid in the water storage chamber increases, the liquid overflows into the temporary storage chamber through the strip overflow port. Based on the liquid level monitoring of the float magnetic flap level gauge 2, the collection water pump 1 and the collection water pump 2 are started individually or simultaneously to discharge the chlorine-containing liquid into the chlorine-containing water recovery equipment;

[0022] Step 4: According to the internal liquid level of the water storage chamber monitored by the float magnetic flap liquid level gauge 1, water can be added in time through the water supply pipe and water supply pump.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) During operation, by setting up a combined equipment body consisting of a water seal tank, a gas-liquid inlet pipe, a negative pressure suction pipe, a negative pressure pump, a chlorine scrubber, a chlorine-containing water suction main pipe, a suction branch pipe 1, a collecting water pump 1, a suction branch pipe 2, a collecting water pump 2, a chlorine-containing water recovery device, a water supply pipe and a water supply pump, the overflow water of multiple water seal tanks can be integrated into a unified collection system, and a fully closed circulation process is provided. The chlorine gas is transported in a closed manner throughout the process through the negative pressure suction pipe and the negative pressure pump. The chlorine-containing sealing water can be recycled and utilized through the chlorine-containing water recovery device. Compared with the direct discharge of chlorine-containing sealing water or the discharge after alkali treatment, this technical method can directly recycle chlorine resources into the brine system, thereby maximizing its utilization efficiency, saving energy and reducing emissions, and improving economic benefits.

[0025] (2) The water seal tank has been designed and calculated to meet the sealing water volume under different loads. It is equipped with an interlocking start and stop function for the liquid level and the collection water pump, which can accurately control the liquid level within a safe range and accurately control the internal air pressure of the water seal tank to avoid air pressure fluctuations affecting the sealing and discharge of chlorine gas;

[0026] (3) By arranging an inner sealing ring, an outer sealing ring, an annular positive pressure chamber, a positive pressure sealing cover, a second air pressure sensor, a third air pressure sensor, a three-way positive pressure pipe and a positive pressure air pump, a multi-stage sealing process can be achieved. By positive pressure sealing, the sealing performance of the connection between the first air pressure sensor, the first float magnetic flap level gauge and the second float magnetic flap level gauge can be improved, thereby effectively preventing chlorine gas leakage;

[0027] (4) The water seal tank, gas and liquid inlet pipe, negative pressure suction pipe, chlorine-containing water suction main pipe, suction branch pipe 1, suction branch pipe 2, water supply pipe, and chlorine-containing sealing water are all made of glass fiber reinforced plastic-PVC composite materials. The negative pressure pump, water collection pump 1, water collection pump 2, and internal circulation air pump are all made of titanium alloy. The inner sealing ring, outer sealing ring, sealing gasket, and O-ring are all made of modified fluororubber + titanium-based coating material, which can effectively improve the overall corrosion resistance, thereby improving the safety of use and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0029] In the attached figure:

[0030] Figure 1 This is a schematic diagram of the structure of an apparatus for preventing leakage of an ion membrane device during the recovery of chlorine-containing sealing water according to the present invention;

[0031] Figure 2 This is a second schematic diagram of the structure of the equipment for preventing leakage of the ion membrane device during the recovery process of chlorine-containing sealing water of the present invention;

[0032] Figure 3This is a schematic structural diagram of the water seal tank of the present invention;

[0033] Figure 4 This is a schematic diagram of the partial structure of the water seal tank of the present invention;

[0034] Figure 5 For the present invention Figure 4 A partial enlarged view of point A in the middle;

[0035] Figure 6 This is a schematic structural diagram of the positive pressure sealing cover of the present invention;

[0036] Figure 1: 1. Combined equipment body; 2. Main controller; 3. Water seal tank; 4. Gas-liquid inlet pipe; 5. Negative pressure suction pipe; 6. Negative pressure pump; 7. Chlorine scrubber; 8. Chlorinated water suction main pipe; 9. Suction branch pipe 1; 10. Collecting water pump 1; 11. Suction branch pipe 2; 12. Collecting water pump 2; 13. Chlorinated water recovery equipment; 14. Make-up water pipe; 15. Make-up water pump; 16. Chlorinated sealing water; 17. Isolation cover; 18. Water storage chamber; 19. Temporary storage chamber; 20. Strip overflow port; 21. Air pressure sensor 1; 22. Float magnetic flap level gauge 1 ; 23. Float magnetic flap level gauge 2; 24. U-shaped air pipe; 25. Aeration plate; 26. Internal circulation air pump; 27. Sight glass; 28. Tank body; 29. ​​Top cover; 30. Inner sealing ring; 31. Outer sealing ring; 32. Annular positive pressure chamber; 33. Air pressure sensor 2; 34. Positive pressure sealing cover; 35. Air pressure sensor 3; 36. Three-way positive pressure pipe; 37. Positive pressure air pump; 38. Sealing gasket; 39. Sleeve; 40. O-ring; 41. Annular groove 1; 42. Elastic pressure ring 1; 43. Annular groove 2; 44. Elastic pressure ring 2. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] Example, by Figures 1 to 6The present invention provides a device for preventing leakage of an ion membrane device during the recovery process of chlorine-containing sealed water, comprising a combined device body 1 and a main controller 2. The combined device body 1 is composed of a water seal tank 3, a gas-liquid inlet pipe 4, a negative pressure suction pipe 5, a negative pressure pump 6, a chlorine scrubber 7, a chlorine-containing water suction main pipe 8, a suction branch pipe 1 9, a collecting water pump 1 10, a suction branch pipe 2 11, a collecting water pump 2 12, a chlorine-containing water recovery device 13, a water supply pipe 14 and a water supply pump 15. The water seal tank 3 is connected to a multi-channel chlorine-containing sealed water 16 through the gas-liquid inlet pipe 4, the negative pressure suction pipe 5 is connected between the water seal tank 3 and the chlorine scrubber 7, the negative pressure pump 6 is connected to the negative pressure suction pipe 5, the chlorine-containing water suction main pipe 8 is connected to the bottom end of one side of the inside of the water seal tank 3, and the suction branch pipe 1 9 and the suction branch pipe 2 11 are both fixed It is connected to the other end of the chlorine-containing water suction main pipe 8, the collecting water pump 10 is connected to the suction branch pipe 19, the collecting water pump 2 12 is connected to the suction branch pipe 2 11, the chlorine-containing water recovery equipment 13 is connected to the other end of the suction branch pipe 19 and the suction branch pipe 2 11, the water supply pipe 14 is connected to one side of the water seal tank 3, the water supply pump 15 is connected to the water supply pipe 14, and an isolation cover 17 is fixedly provided on the bottom end of one side of the water seal tank 3. The isolation cover 17 separates the interior of the water seal tank 3 into a water storage chamber 18 and a temporary storage chamber 19. The chlorine-containing water suction main pipe 8 is connected to the interior of the temporary storage chamber 19. A strip overflow port 20 communicating with the water storage chamber 18 and the temporary storage chamber 19 is provided at the top of one side of the isolation cover 17. The interior of the water storage chamber 18 is filled with liquid water, and the liquid water submerges the bottom of the gas-liquid inlet pipe 4;

[0039] During the operation of the combined device body 1, the chlorine-containing liquid first enters the water storage chamber 18, and the liquid water inside the water storage chamber 18 covers the bottom of the gas-liquid inlet pipe 4 to achieve a sealing effect. When the air pressure inside the gas-liquid inlet pipe 4 increases, chlorine overflows from the water, and the chlorine-containing liquid also enters the water storage chamber 18. The overflow effect of the isolation cover 17 can keep the water level inside the water storage chamber 18 unchanged. Therefore, the internal pressure of the water seal tank 3 can be kept constant during the entire discharge process, preventing the pressure from increasing or decreasing and affecting the sealing and pressure relief.

[0040] The top of the water seal tank 3 is penetrated by an air pressure sensor 1 21, a float magnetic flap liquid level gauge 1 22, and a float magnetic flap liquid level gauge 2 23. The bottom of the float magnetic flap liquid level gauge 1 22 extends to the interior of the water storage chamber 18, and the float magnetic flap liquid level gauge 2 23 extends to the interior of the temporary storage chamber 19.

[0041] The air pressure sensor 1 21 monitors the air pressure inside the water seal tank 3, and the float magnetic flap level gauge 1 22 and the float magnetic flap level gauge 2 23 monitor the liquid levels inside the water storage chamber 18 and the temporary storage chamber 19;

[0042] A U-shaped air pipe 24 is provided through one side of the water seal tank 3. An aeration plate 25 connected to the U-shaped air pipe 24 is fixedly provided at the bottom end of the water seal tank 3. An internal circulation air pump 26 is provided on the U-shaped air pipe 24. During the water replenishment process, it can play an auxiliary stirring role. The internal circulation aeration will not cause the air pressure inside the water seal tank 3 to change. The stirring effect can achieve the mixing of the replenished water and the chlorinated water, and prevent the replenished water from being directly discharged from the strip overflow port 20;

[0043] A sight glass 27 is fixedly provided on the top of one side of the water seal tank 3 to facilitate observation of the internal liquid level;

[0044] The water seal tank 3 is composed of a tank body 28 and a top cover 29. The top cover 29 is connected to the top of the tank body 28 by bolts. An inner sealing ring 30 and an outer sealing ring 31 are provided between the tank body 28 and the top cover 29. An annular positive pressure chamber 32 is formed in the middle position of the connection between the tank body 28 and the top cover 29. An air pressure sensor 2 33 is provided inside the annular positive pressure chamber 32. A positive pressure sealing cover 34 is provided at the top of the top cover 29. An air pressure sensor 35 is provided inside the positive pressure sealing cover 34, which can achieve physical sealing and positive pressure sealing to prevent chlorine leakage.

[0045] A three-way positive pressure pipe 36 is provided between the positive pressure sealing cover 34 and the top cover 29 and is connected to the annular positive pressure chamber 32. The other end of the three-way positive pressure pipe 36 is connected to a positive pressure air pump 37 to provide a positive pressure environment.

[0046] A sealing gasket 38 is provided between the positive pressure sealing cover 34 and the top cover 29. A sleeve 39 matching the negative pressure suction pipe 5 is fixedly provided in the middle position of the top of the positive pressure sealing cover 34. Two O-rings 40 are provided inside the sleeve 39 to assist in sealing the connection between the air pressure sensor 1 21, the float magnetic flap level gauge 1 22, the float magnetic flap level gauge 2 23 and the water seal tank 3, thereby further preventing chlorine leakage.

[0047] An annular groove 41 is provided on the side of the top end of the tank body 28, and an elastic pressure ring 42 is provided inside the annular groove 41. An annular groove 43 is provided on the side of the bottom end of the top cover 29, and an elastic pressure ring 44 is provided inside the annular groove 43 to assist in tightening the inner sealing ring 30 and improve the sealing effect.

[0048] The water seal tank 3, gas-liquid inlet pipe 4, negative pressure suction pipe 5, chlorine-containing water suction main pipe 8, suction branch pipe 1 9, suction branch pipe 2 11, water supply pipe 14, and chlorine-containing sealing water 16 are all made of glass fiber reinforced plastic-PVC composite material. The negative pressure pump 6, collection water pump 1 10, collection water pump 2 12, and internal circulation air pump 26 are all made of titanium alloy. The inner sealing ring 30, outer sealing ring 31, sealing gasket 38, and O-ring 40 are all made of modified fluororubber + titanium-based coating material, which can improve the overall corrosion resistance, thereby improving the safety and service life.

[0049] The working method of the equipment for preventing ion-exchange membrane device leakage in the chlorine-containing sealing water recovery process comprises the following steps:

[0050] Step one, chlorine gas and chlorine-containing liquid enter the inside of the water seal tank 3 through the gas-liquid inlet pipe 4, and the liquid water in the water storage chamber 18 realizes the sealing effect. When the pressure in the gas-liquid inlet pipe 4 increases, the gas-liquid mixture overflows;

[0051] Step two, the negative pressure suction pipe 5 and the negative pressure pump 6 absorb the chlorine gas, so that the chlorine gas enters the inside of the chlorine gas washing tower 7 to realize purification treatment;

[0052] Step three, as the liquid in the water storage chamber 18 increases, the liquid overflows to the inside of the temporary storage chamber 19 through the strip-shaped overflow port 20. According to the liquid level monitoring of the floating ball magnetic flap liquid level gauge two 23, the collecting water pump one 10 and the collecting water pump two 12 are started alone or synchronously to discharge the chlorine-containing liquid to the inside of the chlorine-containing water recovery equipment 13;

[0053] Step four, according to the liquid level in the water storage chamber 18 monitored by the floating ball magnetic flap liquid level gauge one 22, water can be supplemented in time through the water supplement pipe 14 and the water supplement pump 15;

[0054] During operation, by setting up a combined equipment body consisting of a water seal tank, a gas-liquid inlet pipe, a negative pressure suction pipe, a negative pressure pump, a chlorine washing tower, a chlorine-containing water suction main pipe, a suction branch pipe 1, a collecting water pump 1, a suction branch pipe 2, a collecting water pump 2, a chlorine-containing water recovery equipment, a water supply pipe and a water supply pump, it is possible to integrate overflow water from multiple water seal tanks into a unified collection system, and be equipped with a fully closed circulation process, and achieve full-process closed transportation of chlorine through the negative pressure suction pipe and the negative pressure pump. The chlorine-containing sealing water can be recycled through the chlorine-containing water recovery equipment. Compared with the direct discharge of chlorine-containing sealing water or the discharge after alkali treatment, this technical method can directly recycle chlorine resources into the brine system, maximize its utilization efficiency, save energy and reduce emissions, and improve economic benefits; the water seal tank is designed and calculated to meet the sealing water volume under different loads, and is equipped with an interlocking start and stop of the liquid level and the collecting water pump, which can accurately control the liquid level within a safe range, and can accurately control The internal air pressure of the water seal tank is controlled to avoid air pressure fluctuations affecting the sealing and discharge of chlorine; multi-stage sealing processing can be achieved by arranging an inner sealing ring, an outer sealing ring, an annular positive pressure chamber, a positive pressure sealing cover, air pressure sensor 2, air pressure sensor 3, a three-way positive pressure pipe and a positive pressure air pump. Through positive pressure sealing, the sealing performance of the connection between air pressure sensor 1, float magnetic flap level gauge 1 and float magnetic flap level gauge 2 can be improved, effectively avoiding chlorine leakage; the water seal tank, gas and liquid inlet pipe, negative pressure suction pipe, chlorine-containing water suction main pipe, suction branch pipe 1, suction branch pipe 2, water supply pipe and chlorine-containing sealing water are all made of fiberglass-PVC composite material, the negative pressure pump, collection water pump 1, collection water pump 2 and internal circulation air pump are all made of titanium alloy, the inner sealing ring, outer sealing ring, sealing gasket and O-ring are all made of modified fluororubber + titanium-based coating material, which can effectively improve the overall corrosion resistance, thereby improving the safety of use and service life.

Claims

1. A device for preventing leakage of an ion membrane device during the recovery of chlorine-containing sealed water, comprising a combined device body (1) and a master controller (2), characterized in that: The combined equipment body (1) is composed of a water seal tank (3), a gas-liquid inlet pipe (4), a negative pressure suction pipe (5), a negative pressure pump (6), a chlorine scrubber (7), a chlorine-containing water suction main pipe (8), a suction branch pipe (9), a collecting water pump (10), a suction branch pipe (11), a collecting water pump (12), a chlorine-containing water recovery device (13), a water supply pipe (14) and a water supply pump (15). The water seal tank (3) is connected to multiple chlorine-containing sealing water (16) through the gas-liquid inlet pipe (4), the negative pressure suction pipe (5) is connected between the water seal tank (3) and the chlorine scrubber (7), and the negative pressure pump (6) is connected to the chlorine-containing water supply pipe (16). On the negative pressure suction pipe (5), the chlorine-containing water suction main pipe (8) is connected to the bottom end of one side of the water seal tank (3), the suction branch pipe 1 (9) and the suction branch pipe 2 (11) are fixedly connected to the other end of the chlorine-containing water suction main pipe (8), the collection water pump 1 (10) is connected to the suction branch pipe 1 (9), the collection water pump 2 (12) is connected to the suction branch pipe 2 (11), the chlorine-containing water recovery equipment (13) is connected to the other end of the suction branch pipe 1 (9) and the suction branch pipe 2 (11), the water supply pipe (14) is connected to one side of the water seal tank (3), and the water supply pump (15) is connected to the water supply pipe (14); An isolation cover (17) is fixedly provided at the bottom end of one side of the water seal tank (3). The isolation cover (17) separates the inside of the water seal tank (3) into a water storage chamber (18) and a temporary storage chamber (19). The chlorine-containing water suction main pipe (8) is connected to the inside of the temporary storage chamber (19). A strip-shaped overflow port (20) communicating with the water storage chamber (18) and the temporary storage chamber (19) is provided at the top end of one side of the isolation cover (17). The inside of the water storage chamber (18) is filled with liquid water, and the liquid water submerges the bottom of the gas-liquid inlet pipe (4).

2. The device for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 1, characterized in that: The top of the water seal tank (3) is penetrated by an air pressure sensor 1 (21), a float magnetic flap level gauge 1 (22) and a float magnetic flap level gauge 2 (23); the bottom of the float magnetic flap level gauge 1 (22) extends to the interior of the water storage chamber (18), and the bottom of the float magnetic flap level gauge 2 (23) extends to the interior of the temporary storage chamber (19).

3. The device for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 1, characterized in that: A U-shaped air pipe (24) is provided through one side of the water seal tank (3), an aeration plate (25) connected to the U-shaped air pipe (24) is fixedly provided at the bottom end of the water seal tank (3), and an internal circulation air pump (26) is provided on the U-shaped air pipe (24).

4. The device for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 1, characterized in that: A sight glass (27) is fixedly provided on the top end of one side of the water seal tank (3).

5. The device for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 1, characterized in that: The water seal tank (3) is composed of a tank body (28) and a top cover (29). The top cover (29) is connected to the top of the tank body (28) by bolts. An inner sealing ring (30) and an outer sealing ring (31) are provided between the tank body (28) and the top cover (29). An annular positive pressure chamber (32) is formed in the middle position of the connection between the tank body (28) and the top cover (29). An air pressure sensor 2 (33) is provided inside the annular positive pressure chamber (32). A positive pressure sealing cover (34) is provided at the top of the top cover (29), and an air pressure sensor 3 (35) is provided inside the positive pressure sealing cover (34).

6. The device for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 5, characterized in that: A three-way positive pressure pipe (36) communicating with the annular positive pressure chamber (32) is provided between the positive pressure sealing cover (34) and the top cover (29), and the other end of the three-way positive pressure pipe (36) is connected to a positive pressure air pump (37).

7. The device for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 5, characterized in that: A sealing gasket (38) is provided between the positive pressure sealing cover (34) and the top cover (29), and a sleeve (39) matching the negative pressure suction pipe (5) is fixedly provided at the middle position of the top of the positive pressure sealing cover (34), and two O-type sealing rings (40) are provided inside the sleeve (39).

8. The device for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 5, characterized in that: The side edge of the top end of the tank body (28) is provided with an annular groove (41), and an elastic pressing ring (42) is provided inside the annular groove (41). The side edge of the bottom end of the top cover (29) is provided with an annular groove (43), and an elastic pressing ring (44) is provided inside the annular groove (43).

9. The device and method for preventing leakage of an ion membrane device during recovery of chlorine-containing sealing water according to claim 7, characterized in that: The water seal tank (3), the gas-liquid inlet pipe (4), the negative pressure suction pipe (5), the chlorine-containing water suction main pipe (8), the suction branch pipe 1 (9), the suction branch pipe 2 (11), the water supply pipe (14), and the chlorine-containing sealing water (16) are all made of glass fiber reinforced plastic-PVC composite material, the negative pressure pump (6), the collection water pump 1 (10), the collection water pump 2 (12), and the internal circulation air pump (26) are all made of titanium alloy material, and the inner sealing ring (30), the outer sealing ring (31), the sealing gasket (38), and the O-ring (40) are all made of modified fluororubber + titanium-based coating material.

10. The operating method of the device for preventing leakage of an ion membrane device during the recovery process of chlorine-containing sealing water according to claims 1-9, characterized in that: The following steps are involved: Step 1: Chlorine gas and chlorine-containing liquid enter the interior of the water seal tank (3) through the gas-liquid inlet pipe (4). The liquid water inside the water storage chamber (18) realizes the sealing effect. When the internal pressure of the gas-liquid inlet pipe (4) increases, the gas-liquid mixture overflows; Step 2: The negative pressure suction pipe (5) and the negative pressure pump (6) absorb the chlorine gas, so that the chlorine gas enters the interior of the chlorine scrubber (7) for purification; Step 3: As the amount of liquid in the water storage chamber (18) increases, the liquid overflows into the temporary storage chamber (19) through the strip overflow port (20). Based on the liquid level monitoring of the second float magnetic flap level gauge (23), the first collecting water pump (10) and the second collecting water pump (12) are started individually or simultaneously to discharge the chlorine-containing liquid into the chlorine-containing water recovery equipment (13); Step 4: replenish water in time through the water replenishment pipe (14) and the water replenishment pump (15) according to the internal liquid level of the water storage chamber (18) monitored by the float magnetic flap liquid level gauge (22).

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