Sodium chlorate electrolysis production system
By using chlorine instead of hydrochloric acid and combining the automatic adjustment technology of the pH sensor and controller, the problem of large hydrochloric acid consumption in the sodium chlorate production process is solved, reducing production costs and improving adjustment accuracy.
Patent Information
- Application Number
- CN202421254120.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The current sodium chlorate consumption is high during the production process, resulting in high production costs and affecting the development of the enterprise.
Chlorine is used instead of hydrochloric acid, and the chlorine is mixed with brine and crystallized mother liquor in the gas-liquid mixer to adjust the pH value of the mixed solution, and automatically adjust it through the pH sensor and controller.
It reduces the consumption of hydrochloric acid during sodium chlorate electrolysis, reduces production costs, improves the accuracy of pH adjustment, and reduces the labor intensity of staff.
Smart Images
Figure CN222455235U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of sodium chlorate preparation, in particular to a sodium chlorate electrolysis production system. Background technology:
[0002] Sodium chlorate is a widely used oxidant, which is mainly obtained by electrolyzing sodium chloride solution. The process of producing sodium chlorate by electrolysis is as follows: hydrochloric acid is added to the sodium chloride solution, the pH value of the electrolyte is adjusted to 6.6±0.1, and then it is sent to an electrolytic cell without a diaphragm for electrolysis. The sodium chlorate solution obtained by electrolysis is subjected to sodium hypochlorite removal, crystallization, separation, and drying to obtain a crystalline sodium chlorate product. The existing sodium chlorate production process has the problem of large hydrochloric acid consumption and high production costs, which affects the development of enterprises. Utility model content:
[0003] The utility model aims to provide a sodium chlorate electrolysis production system.
[0004] The purpose of the utility model is implemented by the following technical scheme: a sodium chlorate electrolysis production system, which includes a chlorine supply main pipe, a brine pipeline, a gas-liquid mixer, an electrolyte buffer tank, an electrolytic reactor, an exhaust fan, an exhaust scrubber, an alkali solution tank and an alkali solution delivery pump;
[0005] The chlorine supply main pipe is connected to the air inlet of the gas-liquid mixer, the brine pipeline is connected to the liquid inlet of the gas-liquid mixer, the discharge port of the gas-liquid mixer is connected to the liquid inlet pipeline in the circulation area of the electrolyte buffer tank, the discharge port of the circulation area of the electrolyte buffer tank is connected to the inlet of the electrolytic reactor through a first circulation pipeline, a circulation pump is installed on the first circulation pipeline, the outlet of the electrolytic reactor is connected to the second circulation pipeline, and the outlet of the second circulation pipeline is connected to the liquid inlet pipeline; the exhaust port of the gas-liquid mixer is connected to the inlet of the exhaust fan through a pipeline, the outlet of the exhaust fan is connected to the air inlet of the exhaust washing tower through a pipeline, an alkali liquid delivery pump is installed in the alkali liquid tank, the outlet of the alkali liquid delivery pump is connected to the liquid inlet of the exhaust washing tower through a pipeline, and the discharge port of the exhaust washing tower is connected to the inlet of the alkali liquid tank through a pipeline.
[0006] Preferably, the interior of the electrolyte buffer tank is divided into the circulation area and the product area by an overflow partition, and an overflow port is provided at the upper part of the overflow partition.
[0007] Preferably, a crystallization mother liquor delivery pipeline is also connected to the top of the circulation zone of the electrolyte buffer tank.
[0008] Preferably, the crystallization mother liquor delivery pipeline is connected to the brine pipeline through a first pipeline.
[0009] Preferably, a pneumatic regulating valve is installed on the chlorine supply main pipe, and a pH sensor is installed at the discharge port of the gas-liquid mixer, the pH sensor is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the pneumatic regulating valve.
[0010] Preferably, a corrosion-resistant pipe sight glass is also installed at the discharge port of the gas-liquid mixer.
[0011] The utility model has the following advantages: First, the utility model uses chlorine gas instead of hydrochloric acid, and the chlorine gas is mixed and absorbed with brine and crystallization mother liquor in a gas-liquid mixer to adjust the pH value of the mixed solution, thereby reducing the consumption of hydrochloric acid in the process of sodium chlorate electrolysis and reducing the production cost.
[0012] Secondly, the utility model installs a pneumatic regulating valve on the chlorine supply main pipe, and installs a pH sensor at the discharge port of the gas-liquid mixer. The pH sensor is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the pneumatic regulating valve. The pH value of the mixed solution after mixing in the gas-liquid mixer is monitored by the pH sensor. When the pH value is higher than the set range, the controller controls the opening of the pneumatic regulating valve to increase, and automatically adjusts the amount of chlorine added, thereby realizing real-time monitoring and adjustment, improving the adjustment accuracy, and reducing the labor intensity of the staff. Description of the drawings:
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity and labor.
[0014] Figure 1 It is a structural schematic diagram of the utility model.
[0015] Figure 2 It is a schematic diagram of the control principle of the utility model.
[0016] The components in the accompanying drawings are marked as follows: chlorine supply main pipe 1, brine pipeline 2, gas-liquid mixer 3, electrolyte buffer tank 4, circulation area 4.1, product area 4.2, electrolysis reactor 5, exhaust fan 6, exhaust washing tower 7, alkali solution tank 8, alkali solution delivery pump 9, overflow baffle 10, liquid inlet pipeline 11, first circulation pipeline 12, circulation pump 13, second circulation pipeline 14, crystallization mother liquor delivery pipeline 15, first pipeline 16, corrosion-resistant pipeline sight glass 17, pneumatic regulating valve 18, pH sensor 19, controller 20. Specific implementation method:
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] like Figure 1-Figure 2 As shown, a sodium chlorate electrolysis production system comprises a chlorine supply main pipe 1, a brine pipeline 2, a gas-liquid mixer 3, an electrolyte buffer tank 4, an electrolytic reactor 5, an exhaust fan 6, an exhaust scrubber 7, an alkali solution tank 8 and an alkali solution delivery pump 9; the electrolyte buffer tank 4 is divided into a circulation area 4.1 and a product area 4.2 by an overflow partition 10, and an overflow port is provided on the upper part of the overflow partition 10;
[0019] The chlorine supply main pipe 1 is connected to the air inlet of the gas-liquid mixer 3, and chlorine is transported to the gas-liquid mixer 3 through the chlorine supply main pipe 1. The brine pipeline 2 is connected to the liquid inlet of the gas-liquid mixer 3, and brine is transported to the gas-liquid mixer 3 through the brine pipeline 2. The gas-liquid mixer 3 is mainly used to dissolve chlorine in water and react with water to adjust the pH value of the mixed solution. The discharge port of the gas-liquid mixer 3 is connected to the liquid inlet pipeline 11 in the circulation area 4.1 of the electrolyte buffer tank 4. The circulation area 4.1 of the electrolyte buffer tank 4 The discharge port of 4.1 is connected to the inlet of the electrolytic reactor 5 through the first circulation pipeline 12, and a circulation pump 13 is installed on the first circulation pipeline 12. The outlet of the electrolytic reactor 5 is connected to the second circulation pipeline 14, and the outlet of the second circulation pipeline 14 is connected to the liquid inlet pipeline 11. The electrolytic reaction is carried out through the electrolytic reactor 5, and the electrolyte after the reaction enters the circulation area 4.1 of the electrolyte buffer tank 4. Since the density of the product after electrolysis is less than the density of the electrolyte before electrolysis, the product in the circulation area 4.1 The electrolyte that has not been electrolyzed is in the lower part of the circulation area 4.1, and is continuously circulated between the electrolyte buffer tank 4 and the electrolytic reactor 5 through the first circulation pipeline 12 and the second circulation pipeline 14 under the action of the circulation pump 13, and the above process is repeated; the top of the circulation area 4.1 of the electrolyte buffer tank 4 is also connected to the crystallization mother liquor delivery pipeline 15, and the product area 4.2 of the electrolyte buffer tank 4 is discharged The sodium chlorate solution is dechlorinated and crystallized, and the separated crystallization mother liquor enters the circulation area 4.1 of the electrolyte buffer tank 4 through the crystallization mother liquor delivery pipeline 15 to mix with the electrolyte, continue to participate in the circulation, and finally output as a product to reduce waste liquid discharge. The crystallization mother liquor delivery pipeline 15 is connected with the brine pipeline 2 through the first pipeline 16. The crystallization mother liquor enters the gas-liquid mixer 3 through the first pipeline 16 and the brine pipeline 2, mixes with chlorine gas and brine, and adjusts the temperature and pH to continue the electrolysis reaction;
[0020] A corrosion-resistant pipe sight glass 17 is also installed at the discharge port of the gas-liquid mixer 3, through which bubbles are observed and the degree of gas-liquid mixing is analyzed; the exhaust port of the gas-liquid mixer 3 is connected to the inlet of the exhaust fan 6 through a pipeline, and the outlet of the exhaust fan 6 is connected to the air inlet of the exhaust washing tower 7 through a pipeline, and an alkali liquid delivery pump 9 is installed in the alkali liquid tank 8, and the outlet of the alkali liquid delivery pump 9 is connected to the liquid inlet of the exhaust washing tower 7 through a pipeline, and the discharge port of the exhaust washing tower 7 is connected to the inlet of the alkali liquid tank 8 through a pipeline. The top of the alkali solution tank 8 is connected with an alkali replenishing pipeline. When bubbles are observed to overflow from the discharge port of the gas-liquid mixer 3 through the corrosion-resistant pipeline sight glass 17, the exhaust fan 6 is started to extract the excess chlorine into the exhaust washing tower 7. At the same time, the alkali solution delivery pump 9 delivers the alkali solution in the alkali solution tank 8 to the exhaust washing tower 7. The chlorine enters the exhaust washing tower 7 from bottom to top, and after fully contacting and reacting with the alkali solution, it is absorbed by the alkali solution. The mixed liquid at the bottom of the exhaust washing tower 7 flows into the alkali solution tank 8, and the above-mentioned washing process is continued through the alkali solution delivery pump 9;
[0021] A pneumatic regulating valve 18 is installed on the chlorine supply main pipe 1, and a pH sensor 19 is installed at the discharge port of the gas-liquid mixer 3. The pH sensor 19 is electrically connected to the input end of the controller 20, and the output end of the controller 20 is electrically connected to the pneumatic regulating valve 18. The pH value of the mixed solution after mixing in the gas-liquid mixer 3 is monitored by the pH sensor 19. When the pH value is higher than the set range, the controller 20 controls the opening of the pneumatic regulating valve 18 to increase, and automatically adjusts the amount of chlorine added, thereby realizing real-time monitoring and adjustment, improving the adjustment accuracy, and reducing the labor intensity of the staff.
[0022] Working process: chlorine is delivered to the gas-liquid mixer 3 through the chlorine supply main pipe 1, and brine is delivered to the gas-liquid mixer 3 through the brine pipeline 2. Chlorine is dissolved in water in the gas-liquid mixer 3 to react with water, and chlorine is used instead of hydrochloric acid to adjust the pH value of the mixed solution; a pH sensor 19 is installed at the discharge port of the gas-liquid mixer 3. When the pH sensor 19 detects that the pH value of the mixed solution is higher than the set range, the controller 20 controls the opening of the pneumatic regulating valve 18 to increase, and automatically adjusts the amount of chlorine added; when the pH sensor 19 detects that the pH value of the mixed solution is within the set range, the controller 20 controls the pneumatic regulating valve 18 to be adjusted to a suitable opening;
[0023] The mixed solution discharged from the gas-liquid mixer 3 enters the circulation area 4.1 of the electrolyte buffer tank 4 through the pipeline, and the circulation pump 13 is turned on. After the electrolytic reactor 5 is started, the electrolyte is continuously circulated between the electrolyte buffer tank 4 and the electrolytic reactor 5. Initially, no product is output, and the pH value of the electrolyte is adjusted to 6.6±0.1;
[0024] After the electrolysis reaction occurs in the electrolysis reactor 5, the electrolyte enters the circulation area 4.1 of the electrolyte buffer tank 4. Since the density of the product after electrolysis is lower than that of the electrolyte before electrolysis, the product is in the upper part of the circulation area 4.1 of the electrolyte buffer tank 4. When the product overflows to the product area 4.2 of the electrolyte buffer tank 4 through the overflow port of the overflow partition 10, the product output begins. The sodium chlorate solution discharged from the product area 4.2 of the electrolyte buffer tank 4 undergoes the sodium hypochlorite removal and crystallization process, and the separated crystal mother liquor enters the circulation area 4.1 of the electrolyte buffer tank 4 through the crystal mother liquor delivery pipeline 15 to mix with the electrolyte, continue to participate in the circulation, reduce waste liquid discharge, and finally output as a product; the crystal mother liquor can also enter the gas-liquid mixer 3 through the first pipeline 16 and the brine pipeline 2, mix with chlorine gas and brine, adjust the temperature and pH, and continue the electrolysis reaction; and the electrolyte that has not been electrolyzed is in the lower part of the circulation area 4.1 and continues to participate in the circulation;
[0025] During the electrolytic reaction, bubbles are observed through the corrosion-resistant pipe sight glass 17 to analyze the degree of gas-liquid mixing; when bubbles are observed overflowing from the discharge port of the gas-liquid mixer 3 through the corrosion-resistant pipe sight glass 17, the exhaust fan 6 is started to pump excess chlorine into the exhaust washing tower 7, and at the same time, the alkali solution delivery pump 9 delivers the alkali solution in the alkali solution tank 8 to the exhaust washing tower 7, and the chlorine enters the exhaust washing tower 7 from bottom to top, and after fully contacting and reacting with the alkali solution, it is absorbed by the alkali solution, and the mixed liquid at the bottom of the exhaust washing tower 7 flows into the alkali solution tank 8, and the above-mentioned washing process is continued through the alkali solution delivery pump 9.
[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A sodium chlorate electrolysis production system, characterized in that: It includes a chlorine supply main, a brine pipeline, a gas-liquid mixer, an electrolyte buffer tank, an electrolytic reactor, an exhaust fan, an exhaust scrubber, an alkali solution tank and an alkali solution delivery pump; The chlorine supply main pipe is connected to the air inlet of the gas-liquid mixer, the brine pipeline is connected to the liquid inlet of the gas-liquid mixer, the discharge port of the gas-liquid mixer is connected to the liquid inlet pipeline in the circulation area of the electrolyte buffer tank, the discharge port of the circulation area of the electrolyte buffer tank is connected to the inlet of the electrolytic reactor through a first circulation pipeline, a circulation pump is installed on the first circulation pipeline, the outlet of the electrolytic reactor is connected to the second circulation pipeline, and the outlet of the second circulation pipeline is connected to the liquid inlet pipeline; the exhaust port of the gas-liquid mixer is connected to the inlet of the exhaust fan through a pipeline, the outlet of the exhaust fan is connected to the air inlet of the exhaust washing tower through a pipeline, an alkali liquid delivery pump is installed in the alkali liquid tank, the outlet of the alkali liquid delivery pump is connected to the liquid inlet of the exhaust washing tower through a pipeline, and the discharge port of the exhaust washing tower is connected to the inlet of the alkali liquid tank through a pipeline.
2. A sodium chlorate electrolysis production system according to claim 1, characterized in that: The interior of the electrolyte buffer tank is divided into the circulation area and the product area by an overflow partition, and an overflow port is provided at the upper part of the overflow partition.
3. A sodium chlorate electrolysis production system according to claim 1 or 2, characterized in that: The top of the circulation zone of the electrolyte buffer tank is also connected to a crystallization mother liquor delivery pipeline.
4. A sodium chlorate electrolysis production system according to claim 3, characterized in that: The crystallization mother solution conveying pipeline is connected to the brine pipeline through a first pipeline.
5. A sodium chlorate electrolysis production system according to claim 1, characterized in that: A pneumatic regulating valve is installed on the chlorine supply main pipe, and a pH sensor is installed at the liquid discharge port of the gas-liquid mixer. The pH sensor is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the pneumatic regulating valve.
6. A sodium chlorate electrolysis production system according to claim 1, characterized in that: A corrosion-resistant pipeline sight glass is also installed at the liquid discharge port of the gas-liquid mixer.