Chlorine purification system of hydrochloric acid system solution electrolytic bath

Abstract

The utility model relates to the technical field of electrolytic gas treatment, and discloses a hydrochloric acid system solution electrolytic bath chlorine gas purification system which comprises an electrolysis module, a purification module, a primary separation module and a secondary separation module, the primary separation module is used for carrying out gas-liquid separation on chlorine gas generated by the electrolysis module, and a gas phase obtained through separation enters the purification module; a water phase obtained through separation enters a secondary separation module; the primary separation module is used for separating chlorine from a water phase, the secondary separation module is used for separating chlorine from the water phase, and the chlorine obtained through separation enters the purification module, so that chlorine in the electrolysis module is decomposed through the primary separation module and the secondary separation module, and the chlorine obtained through decomposition is treated through the purification module; therefore, chlorine generated by electrolysis is prevented from polluting the atmospheric environment or harming the safety of workers.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic gas treatment, in particular to a chlorine purification system for an electrolytic cell of a hydrochloric acid system solution. Background Technique

[0002] During the process of nickel production by high-temperature electrolysis of nickel chloride molten salt, chlorine gas is generated, and part of the chlorine gas will dissolve in water vapor. If not treated in time, these chlorine gases will be discharged into the atmosphere, which is likely to cause environmental pollution and endanger the health of workers. Therefore, it is necessary to collect and centrally treat the chlorine gas dissolved in water vapor to prevent the chlorine gas from being discharged into the atmosphere in the form of gas or in a form dissolved in a liquid.

[0003] In the prior art, the utility model patent (CN216237307U) discloses an anti-trichloronitrogen explosion-proof device for electrolytic production, including a chlorine water scrubbing tower. The lower part of the chlorine water scrubbing tower is connected with a liquid outlet pipe, the other end of the liquid outlet pipe is connected with a chlorine water storage tank, the chlorine water storage tank is connected with a return liquid pipe, the return liquid pipe penetrates into the chlorine water scrubbing tower from the upper part of the chlorine water scrubbing tower, the top of the chlorine water scrubbing tower is connected with a gas transmission pipe, the gas transmission pipe is connected with a chlorine gas cooler, the chlorine gas cooler is connected with a water mist separator, the water mist separator is connected with a first liquid delivery pipe, and the first liquid delivery pipe is connected with the chlorine water storage tank. The separation and collection of chlorine gas by this device are not thorough.

[0004] Based on this, the technical problem to be solved in this case is: to provide a collection system for removing the moisture of chlorine gas and collecting chlorine gas. Utility Model Content

[0005] To solve the above technical problems, the utility model provides a chlorine purification system for an electrolytic cell of a hydrochloric acid system solution. This system uses a primary separation module to preliminarily separate the chlorine gas in the material, and then further separates it through a secondary separation module to improve the separation effect. Moreover, the separated chlorine gas is purified through a purification module, thereby avoiding the electrolytically generated chlorine gas from polluting the atmospheric environment or endangering the safety of workers.

[0006] The technical solution of the utility model is:

[0007] A chlorine purification system for an electrolytic cell of a hydrochloric acid system solution includes an electrolysis module, a purification module, a primary separation module, and a secondary separation module. The primary separation module is used for gas-liquid separation of the chlorine gas generated by the electrolysis module. The separated gas phase enters the purification module, and the separated water phase enters the secondary separation module; the secondary separation module is used for separating the chlorine gas in the water phase, and the separated chlorine gas enters the purification module.

[0008] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, the secondary separation module includes a liquid storage tank, a first transfer pump, and an atomizing head arranged in the liquid storage tank; the first transfer pump is used to spray the aqueous phase into the liquid storage tank through the atomizing head; the upper part of the liquid storage tank is connected to the purification module through a pipeline.

[0009] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, a second transfer pump is provided between the liquid storage tank and the electrolysis module; the second transfer pump is used to pump the liquid in the liquid storage tank into the electrolysis module.

[0010] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, the primary separation module includes a gas-liquid separator and a liquid storage tank for storing the aqueous phase. The liquid storage tank is connected to the liquid outlet end of the gas-liquid separator, the gas outlet end of the gas-liquid separator is communicated with the purification module, and the first transfer pump is used to transport the aqueous phase in the liquid storage tank to the liquid storage tank.

[0011] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, the electrolysis module includes an electrolytic cell, and an exhaust pipe for discharging chlorine gas is provided on the electrolytic cell. The exhaust pipe is communicated with the gas-liquid separator.

[0012] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, there are two exhaust pipes, and both exhaust pipes are communicated with the gas-liquid separator.

[0013] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, the exhaust pipes are all tetrafluoroethylene hoses.

[0014] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, the purification module includes a three-way pipe and a spray tower. The first branch pipe of the three-way pipe is communicated with the upper part of the liquid storage tank, the second branch pipe of the three-way pipe is communicated with the gas outlet end of the gas-liquid separator, the third branch pipe of the three-way pipe is communicated with the spray tower, and a centrifugal fan is provided on the third branch pipe.

[0015] In the chlorine gas purification system for the electrolytic cell of the hydrochloric acid system solution mentioned above, a concentration sensor and a pressure sensor are also provided on the third branch pipe, and the concentration sensor, the pressure sensor, and the centrifugal fan are arranged in sequence on the third branch pipe.

[0016] One of the technical solutions in the above technical solutions of the present utility model has at least the following advantages or beneficial effects:

[0017] The present utility model uses a primary separation module to preliminarily separate the chlorine gas in the material, and then further separates it through a secondary separation module, improving the separation effect, and the separated chlorine gas is purified through the purification module, thereby avoiding the chlorine gas generated by electrolysis from polluting the atmospheric environment or endangering the safety of the staff. Description of the Drawings

[0018] Figure 1This is the pipeline diagram of Embodiment 1 of the present utility model.

[0019] Among them, the specific meanings of the reference numerals are as follows:

[0020] 1. Electrolysis module; 2. Primary separation module; 3. Secondary separation module; 4. Purification module; 5. Second delivery pump; 11. Electrolytic cell; 12. Exhaust pipe; 21. Gas-liquid separator; 22. Liquid storage tank; 23. First delivery pump; 31. Liquid storage tank; 32. Atomizing head; 41. Three-way pipe; 42. Spray tower; 43. Centrifugal fan; 411. First branch pipe; 412. Second branch pipe; 413. Third branch pipe; 414. Concentration sensor; 415. Pressure sensor. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment 1

[0023] Please refer to Figure 1 , a chlorine gas purification system for an electrolytic cell of a hydrochloric acid system solution, including an electrolysis module 1, a purification module 4, a primary separation module 2, and a secondary separation module 3. The primary separation module 2 is used to perform gas-liquid separation on the chlorine gas generated by the electrolysis module 1. The separated gas phase enters the purification module 4, and the separated aqueous phase enters the secondary separation module 3; the secondary separation module 3 is used to separate the chlorine gas in the aqueous phase, and the separated chlorine gas enters the purification module 4.

[0024] In the actual application process, the staff obtains the required substances through the electrolysis module 1. Specifically, in this embodiment, the high-temperature electrolysis of nickel chloride molten salt method is used to produce nickel, and chlorine gas will be generated during this electrolysis process. By adopting this purification system, the chlorine gas can be preliminarily separated by the primary separation module 2, and the chlorine gas can be further separated by the secondary separation module 3, improving the separation effect, enabling a more complete separation of the chlorine gas, and the separated chlorine gas is purified by the purification module 4. In this way, it can be avoided that the chlorine gas generated by electrolysis is discharged into the atmosphere without treatment, polluting the atmospheric environment and affecting the working environment. In particular, it will also affect the health and safety of the staff.

[0025] Further, the secondary separation module 3 includes a liquid storage tank 22, a first delivery pump 23, and an atomizing head 32 disposed within the liquid storage tank 22; the first delivery pump 23 is configured to spray the aqueous phase into the liquid storage tank 22 through the atomizing head 32; the upper portion of the liquid storage tank 22 is connected to the purification module 4 through a pipeline.

[0026] Through the above design, the liquid separated by the primary separation module 2 is delivered to the atomizing head 32 by the first delivery pump 23, and the liquid is atomized into fine particles by the atomizing head 32, wherein chlorine gas will be separated from the liquid. The separated chlorine gas will be close to the top of the liquid storage tank 31, and the chlorine gas will be close to the upper portion of the liquid storage tank 31 and enter the purification module 4 to be purified, avoiding the chlorine gas from overflowing into the working environment and endangering the health and safety of the staff.

[0027] Furthermore, a second delivery pump 5 is provided between the liquid storage tank 31 and the electrolysis module 1; the second delivery pump 5 is configured to pump the liquid in the liquid storage tank 31 into the electrolysis module 1.

[0028] In this embodiment, the liquid in the liquid storage tank 31 is an electrolytic solution, specifically the same solution as that in the electrolysis module 1. Through the atomizing head 32, the liquid generated by the gas-liquid separator 21 will be atomized into fine particles. When cooled, it will form a liquid and deposit at the bottom of the liquid storage tank 31. This part of the liquid and the liquid originally in the liquid storage tank 31 will be pumped back into the electrolysis module 1 by the second delivery pump 5 to improve the utilization rate.

[0029] Preferably, the primary separation module 2 includes a gas-liquid separator 21 and a liquid storage tank 22 for storing the aqueous phase. The liquid storage tank 22 is connected to the liquid outlet end of the gas-liquid separator 21. The gas outlet end of the gas-liquid separator 21 is communicated with the purification module 4. The first delivery pump 23 is configured to deliver the aqueous phase in the liquid storage tank 22 into the liquid storage tank 31.

[0030] In the above design, the chlorine gas generated by electrolysis in the electrolysis module 1 is first separated by the gas-liquid separator 21. Since part of the chlorine gas generated by the electrolysis method adopted in this embodiment will dissolve in water vapor, the gas-liquid separator 21 can separate the chlorine gas dissolved in the water vapor. The separated chlorine gas will enter the purification module 4 for purification from the gas outlet end of the gas-liquid separator 21, while the separated aqueous phase will enter the liquid storage tank 22 and be delivered to the secondary separation module 3 by the first delivery pump 23 to further separate chlorine gas. In this way, the chlorine gas dissolved in the water vapor can be separated, which is beneficial for further separating chlorine gas subsequently.

[0031] Further, the electrolysis module 1 includes an electrolysis cell 11, and an exhaust pipe 12 is provided on the electrolysis cell 11. The exhaust pipe 12 is communicated with the gas-liquid separator 21.

[0032] Through the above design, the gas generated in the electrolytic cell 11 will be transported to the gas-liquid separator 21 through the exhaust pipe 12, and the gas will be separated by the gas-liquid separator 21. Among them, there is also an anode plate on the electrolytic cell 11 for electrolysis. Specifically, the loss of the electrolyte solution generated by electrolysis in the electrolytic cell 11 can be supplemented by transporting the liquid in the liquid storage tank 31 back into the electrolytic cell 11 through the second delivery pump 5, thereby improving the utilization rate of the electrolyte solution.

[0033] Preferably, there are two exhaust pipes 12, and both of the two exhaust pipes 12 are communicated with the gas-liquid separator 21.

[0034] In this embodiment, the two exhaust pipes 12 are beneficial to transporting the chlorine gas generated by electrolysis into the gas-liquid separator 21, which can avoid the adverse effect on the exhaust of the exhaust pipe 12 due to excessive air pressure. Through the two exhaust pipes 12, the transportation pressure of chlorine gas can be effectively shared, and more chlorine gas can be discharged per unit time. On the other hand, it is also beneficial to discharge the chlorine gas generated by electrolysis.

[0035] More preferably, the exhaust pipes 12 are all tetrafluoro hoses.

[0036] In this embodiment, the exhaust pipes 12 are tetrafluoro hoses. The tetrafluoro hoses can prevent product contamination by the material, and have strong corrosion resistance, long service life, and can be used for a long time.

[0037] More preferably, the purification module 4 includes a tee 41, a spray tower 42. The first branch pipe 411 of the tee 41 is communicated with the upper part of the liquid storage tank 31, the second branch pipe 412 of the tee 41 is communicated with the air outlet end of the gas-liquid separator 21, the third branch pipe 413 of the tee 41 is communicated with the spray tower 42, and a centrifugal fan 43 is provided on the third branch pipe 413.

[0038] Through the above design, through the tee 41, the chlorine gas separated by the primary separation module 2 and the secondary separation module 3 can be transported to the spray tower 42 together through the centrifugal fan 43, and the chlorine gas can be purified by the spray tower 42. Specifically, the centrifugal fan 43 can improve the efficiency of transporting chlorine gas.

[0039] More preferably, a concentration sensor 414 and a pressure sensor 415 are also provided on the third branch pipe 413, and the concentration sensor 414, the pressure sensor 415, and the centrifugal fan 43 are arranged in sequence on the third branch pipe 413.

[0040] In this embodiment, the concentration sensor 414 is used to detect the chlorine concentration on the tee 41, and the pressure sensor 415 is used to detect the wind pressure of the centrifugal fan 43. It should be noted that the centrifugal fan 43 is controlled by an external PLC system. Specifically, when the concentration sensor 414 detects that the chlorine concentration on the tee 41 exceeds the limit set by the PLC system, the PLC system will control the centrifugal fan 43 and the fan of the spray tower 42 to work at full power, discharging the chlorine in the tee 41 to the spray tower 42 faster and improving the purification efficiency of the spray tower 42; when the pressure sensor 415 detects that the wind pressure of the centrifugal fan 43 is lower than the limit set by the PLC system, the PLC system will control the centrifugal fan 43 to work at full power, thereby preventing the chlorine delivery efficiency from being too low and facilitating the prevention of energy waste. Specifically, the delivery efficiency and purification efficiency of chlorine are ensured by controlling the limit of the PLC system.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A chlorine gas purification system for an electrolytic cell in a hydrochloric acid system solution, comprising an electrolysis module, a purification module, a primary separation module, and a secondary separation module, characterized in that, The primary separation module is used to separate chlorine gas generated by the electrolysis module, and the separated gas phase enters the purification module, while the separated aqueous phase enters the secondary separation module; The secondary separation module is used to separate chlorine gas from the aqueous phase, and the separated chlorine gas enters the purification module; The secondary separation module includes a liquid storage tank, a first transfer pump, and an atomizing head disposed in the liquid storage tank; the first transfer pump is used to spray the aqueous phase into the liquid storage tank through the atomizing head; the upper part of the liquid storage tank is connected to the purification module through a pipeline; The primary separation module includes a gas-liquid separator and a liquid storage tank for storing the aqueous phase. The liquid storage tank is connected to the liquid outlet end of the gas-liquid separator, the gas outlet end of the gas-liquid separator is communicated with the purification module, and the first transfer pump is used to transport the aqueous phase in the liquid storage tank to the liquid storage tank.

2. The chlorine gas purification system for the hydrochloric acid system solution electrolytic cell according to claim 1, wherein A second transfer pump is provided between the liquid storage tank and the electrolysis module; the second transfer pump is used to pump the liquid in the liquid storage tank into the electrolysis module.

3. A chlorine purification system for a hydrochloric acid system solution electrolytic cell according to claim 1, characterized in that, The electrolysis module includes an electrolytic cell, and an exhaust pipe for discharging chlorine gas is provided on the electrolytic cell, and the exhaust pipe is communicated with the gas-liquid separator.

4. The chlorine purification system for a hydrochloric acid system solution electrolytic cell according to claim 3, characterized in that, There are two exhaust pipes, and both of the two exhaust pipes are communicated with the gas-liquid separator.

5. A chlorine gas purification system for a hydrochloric acid system solution electrolytic cell according to claim 4, characterized in that, The exhaust pipes are all tetrafluoroethylene hoses.

6. The chlorine gas purification system for a hydrochloric acid system solution electrolytic cell according to claim 1, characterized in that, The purification module includes a three-way pipe and a spray tower. The first branch pipe of the three-way pipe is communicated with the upper part of the liquid storage tank, the second branch pipe of the three-way pipe is communicated with the gas outlet end of the gas-liquid separator, the third branch pipe of the three-way pipe is communicated with the spray tower, and a centrifugal fan is provided on the third branch pipe.

7. The chlorine purification system for a hydrochloric acid system solution electrolytic cell according to claim 6, characterized in that, A concentration sensor and a pressure sensor are also provided on the third branch pipe, and the concentration sensor, the pressure sensor, and the centrifugal fan are arranged in sequence on the third branch pipe.

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