CN213652670U - Circulating temperature regulating system of ion membrane electrolytic cell - Google Patents
Circulating temperature regulating system of ion membrane electrolytic cell Download PDFInfo
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- CN213652670U CN213652670U CN202021923134.8U CN202021923134U CN213652670U CN 213652670 U CN213652670 U CN 213652670U CN 202021923134 U CN202021923134 U CN 202021923134U CN 213652670 U CN213652670 U CN 213652670U
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- Prior art keywords
- electrolytic cell
- sodium hydroxide
- temperature
- heat exchanger
- path
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 15
- 239000012528 membrane Substances 0.000 title claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 111
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 239000012266 salt solution Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000003513 alkali Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 150000003839 salts Chemical class 0.000 description 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000003014 ion exchange membrane Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000010151 yanghe Substances 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a circulating temperature regulating system of an ion membrane electrolytic cell, which comprises an electrolytic cell, wherein an anode chamber of the electrolytic cell is provided with a salt solution conveying pipe; a sodium hydroxide outlet of the cathode chamber of the electrolytic cell is connected with a heat source inlet of the heat exchanger through a pipeline; the heat source outlet of the heat exchanger is divided into two paths of sodium hydroxide output pipes, one path of the sodium hydroxide output pipe is communicated with the cathode chamber of the electrolytic cell, a control valve and a rotor flow meter are arranged in the path, and the other path of the sodium hydroxide output pipe is communicated with the sodium hydroxide finished product tank. The utility model cools the sodium hydroxide produced by the electrolytic cell to a certain temperature through the heat exchanger, and introduces the part into the cathode chamber of the electrolytic cell, thereby effectively reducing the self temperature of the cathode circulating liquid and effectively controlling the operation temperature of the electrolytic cell; the method has the advantages that extra energy consumption is not required to be added, the running temperature of the electrolytic cell is effectively reduced, the process running parameters are controlled, the intrinsic safety of equipment is improved, and the continuous, stable, efficient and safe running of the chlor-alkali production line is ensured.
Description
Technical Field
The utility model belongs to the chemical industry field, concretely relates to ionic membrane electrolysis trough circulation temperature regulating system.
Background
The ion exchange membrane electrolytic cell mainly comprises an anode, a cathode, an ion exchange membrane, an electrolytic cell frame, a conductive copper bar and the like; each electrolytic tank is composed of a plurality of unit tanks which are connected in series or in parallel. The electrolytic cell is divided into a cathode chamber and an anode chamber by an ion exchange membrane, and the cathode chamber and the anode chamber are separated by the ion exchange membrane. Sodium hydroxide was added to the cathode chamber and brine was added to the anode chamber, and after electrolysis, 32% sodium hydroxide, 98% chlorine, 99.9% hydrogen, etc. were produced. At present, during the production and operation period of the ion membrane electrolytic cell, the service life of the cathode and anode coating and the ion exchange membrane is limited and the capability is reduced when the electrolytic cell is operated to the later stage, and the side reactions of electrolysis are increased during the period, so that the operation temperature of the electrolytic cell reaches more than 89 ℃ during the production in summer (the process index is 80-89 ℃). The performance of the frame gasket (rubber material) of the electrolytic cell can be reduced due to the overhigh temperature, the possibility of leakage of dangerous chemicals (sodium hydroxide, chlorine and hydrogen) is increased, potential safety production hazards exist, the burden is increased by cooling and dewatering of a subsequent chlorine and hydrogen treatment system, and the balance of the whole chlor-alkali production line is influenced to a certain degree.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides an ion membrane electrolytic cell circulation temperature regulating system, which can effectively control the temperature of the electrolytic cell.
The utility model adopts the following technical scheme: a circulating temperature regulating system of an ion membrane electrolytic cell comprises an electrolytic cell, wherein an anode chamber of the electrolytic cell is provided with a salt solution conveying pipe; the sodium hydroxide outlet of the electrolytic cell is connected with the heat source inlet of the heat exchanger through a pipeline, the heat source outlet of the heat exchanger is divided into two paths of sodium hydroxide output pipes, one path of the sodium hydroxide output pipes is communicated with the cathode chamber of the electrolytic cell, a control valve and a rotor flow meter are arranged in the path, the operation temperature of the electrolytic cell is kept within a certain temperature range by controlling the flow rate of low-temperature sodium hydroxide, and the other path of the sodium hydroxide output pipes is output to a sodium hydroxide finished product tank.
Furthermore, a cold source inlet of the heat exchanger is connected with the cooling water inlet pipe, and a cold source outlet is connected with one end of the water outlet pipe.
Furthermore, the device also comprises a controller which is respectively and electrically connected with the rotameter and the control valve.
Further, the control valve is a pneumatic membrane regulating valve.
Further, the rotor flowmeter is a metal tube rotor flowmeter.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model cools the sodium hydroxide produced by the electrolytic cell to a certain temperature through the heat exchanger, and introduces the part into the cathode chamber of the electrolytic cell, thereby effectively reducing the self temperature of the cathode circulating liquid and effectively controlling the operation temperature of the electrolytic cell; the method has the advantages that extra energy consumption is not required to be added, the running temperature of the electrolytic cell is effectively reduced, the process running parameters are controlled, the intrinsic safety of equipment is improved, and the continuous, stable, efficient and safe running of the chlor-alkali production line is ensured.
The utility model controls the running temperature of the electrolytic bath within the range of 82-85 ℃, and reduces the burden for the cooling and dewatering of the subsequent chlorine and hydrogen treatment system.
The utility model discloses low temperature alkali pipeline is equipped with automatic regulating valve, online flow monitoring's rotameter, and remote operation, regulation accuse temperature are realized to the accessible DCS, stable production.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the device comprises an electrolytic cell, 2 heat exchangers, 3 control valves, 4 rotor flowmeters, 5 water outlet pipes, 6 cooling water inlet pipes, 7 finished product tanks, 8 saline water conveying pipes, 9 chlorine pipes, 10 hydrogen pipes, 11 sodium hydroxide output pipes, 12 sodium hydroxide conveying pipes and 13 low-temperature sodium hydroxide conveying pipes.
Detailed Description
The invention will be further explained and explained with reference to the drawings;
as shown in figure 1, the circulating temperature regulating system of the ionic membrane electrolytic cell comprises an electrolytic cell 1, wherein a saline solution conveying pipe 8 is arranged on a cathode chamber of the electrolytic cell 1; a sodium hydroxide outlet of a cathode chamber of the electrolytic cell 1 is connected with a heat source inlet of the heat exchanger 2 through a pipeline; the heat source outlet of the heat exchanger 2 is divided into two paths, wherein one path is a low-temperature sodium hydroxide conveying pipe 13 which is communicated with a cathode chamber of the electrolytic cell, a control valve 3 and a rotor flow meter 4 are arranged in the path, and the other path is a sodium hydroxide output pipe which is communicated with a sodium hydroxide finished product tank 7. The cold source inlet of the heat exchanger 2 is connected with the cooling water inlet pipe 6, the cold source outlet is connected with the water outlet pipe 5, and the hot water in the water outlet pipe 5 can evolve into the salt pond for salt dissolving. The controller is connected with the rotor flow meter 4 and the control valve 3 through 4-20mA signal lines respectively, the rotor flow meter 4 converts flow into 4-20mA signals and transmits the 4-20mA signals to the controller, the controller receives the signals and outputs the 4-20mA signals to the control valve 3 after internal operation, the control valve 3 adjusts the valve opening degree through a positioner after receiving the signals to adjust the sodium hydroxide flow, the controller is a Yanghe CS2000 controller, the model is CP451, the rotor flow meter is a metal tube rotor flow meter, the model is KROHNE250, the control valve is a pneumatic film regulating valve, and the model is VC-1000LSi 13.
When the device is used, a salt melting pool heats salt, refines the salt and then enters the electrolytic cell 1 for electrolysis, sodium hydroxide with the temperature of 85 ℃ generated after the electrolysis of the electrolytic cell 1 enters from a heat source inlet of the heat exchanger 2, the sodium hydroxide is subjected to heat exchange and is cooled to 40 ℃ by the heat exchanger 2 and then is output from a heat source outlet of the heat exchanger 2 to be divided into two paths, wherein 32 percent of sodium hydroxide with the temperature of 40 ℃ in one path is directly output to the finished product tank 7, and the sodium hydroxide with the temperature of 40 ℃ in the other path is conveyed to the electrolytic cell 1, so that part of the sodium hydroxide with the temperature of 40 ℃ is continuously returned to the electrolytic cell 1, and the temperature of a cathode circulating liquid in the electrolytic cell 1 is reduced by introducing low; the low-temperature sodium hydroxide conveying pipe is provided with a control valve 3 and a rotor flow meter 4 for online flow monitoring, the DCS controller controls the control valve 3 to automatically adjust according to the online flow monitoring of the rotor flow meter 4, and controls the flow of sodium hydroxide return flow at 40 ℃ to be 2-5 cubic/hour, so that the running temperature of the electrolytic cell is always accurately kept within the range of 82-85 ℃, and stable production is realized. The hot water heated after the heat exchange of the heat exchanger 2 is discharged from the cold source outlet and can be led to the salt melting tank for salt melting, so that the energy consumption is saved.
The above is only a preferred example of the present method of operation, and it should be noted that: any person skilled in the art, consistent with the principles of process control, would be able to make changes or modifications within the scope of this method of operation.
Claims (5)
1. A circulating temperature regulating system of an ion membrane electrolytic cell comprises an electrolytic cell, wherein an anode chamber of the electrolytic cell is provided with a salt solution conveying pipe; the method is characterized in that: the sodium hydroxide outlet of the electrolytic cell is connected with the heat source inlet of the heat exchanger through a pipeline, the heat source outlet of the heat exchanger is divided into two paths of sodium hydroxide output pipes, one path of the sodium hydroxide output pipes is communicated with the cathode chamber of the electrolytic cell, a control valve and a rotor flow meter are arranged in the path, the operation temperature of the electrolytic cell is kept within a certain temperature range by controlling the flow rate of low-temperature sodium hydroxide, and the other path of the sodium hydroxide output pipes is output to a sodium hydroxide finished product tank.
2. The circulating temperature regulating system of the ionic membrane electrolytic cell according to claim 1, characterized in that: the cold source inlet of the heat exchanger is connected with the cooling water inlet pipe, and the cold source outlet is connected with one end of the water outlet pipe.
3. The circulating temperature regulating system of the ionic membrane electrolytic cell according to claim 1 or 2, characterized in that: the device also comprises a controller which is respectively and electrically connected with the rotameter and the control valve.
4. The circulating temperature regulating system of the ionic membrane electrolytic cell according to claim 3, characterized in that: the control valve is a pneumatic membrane regulating valve.
5. The system according to claim 1, 2 or 4, wherein: the rotor flowmeter is a metal tube rotor flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021923134.8U CN213652670U (en) | 2020-09-07 | 2020-09-07 | Circulating temperature regulating system of ion membrane electrolytic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021923134.8U CN213652670U (en) | 2020-09-07 | 2020-09-07 | Circulating temperature regulating system of ion membrane electrolytic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213652670U true CN213652670U (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021923134.8U Active CN213652670U (en) | 2020-09-07 | 2020-09-07 | Circulating temperature regulating system of ion membrane electrolytic cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116970970A (en) * | 2023-08-22 | 2023-10-31 | 山东红星化工有限公司 | An ion membrane electrolysis device with adjustable electrolyte flow rate |
-
2020
- 2020-09-07 CN CN202021923134.8U patent/CN213652670U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116970970A (en) * | 2023-08-22 | 2023-10-31 | 山东红星化工有限公司 | An ion membrane electrolysis device with adjustable electrolyte flow rate |
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