CN217579086U - Fluorine-making electrolytic cell with hydrogen fluoride recovery function - Google Patents
Fluorine-making electrolytic cell with hydrogen fluoride recovery function Download PDFInfo
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- CN217579086U CN217579086U CN202122518379.3U CN202122518379U CN217579086U CN 217579086 U CN217579086 U CN 217579086U CN 202122518379 U CN202122518379 U CN 202122518379U CN 217579086 U CN217579086 U CN 217579086U
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Abstract
The utility model discloses a fluorine-making electrolytic cell with hydrogen fluoride recovery function, wherein a carbon anode (9) and a cathode-anode isolation apron board (2) are arranged in an electrolytic cell (1), and the electrolytic cell (1) is divided into a cathode chamber and an anode chamber by the cathode-anode isolation apron board (2); be provided with cathode condensation tube bank (5) outside the electrolysis trough hydrogen outlet pipe, fluorine outlet pipe is provided with on anode condensation tube bank (7) outward, refrigerant import pipe (3) are connected respectively in cathode condensation tube bank (5) bottom and anode condensation tube bank (7) bottom, refrigerant outlet pipe (8) are drawn forth by cathode condensation tube bank (5) upper portion and anode condensation tube bank (7) upper portion and are merged the back and connect in refrigerant storage tank (10), refrigerant power pump (11) are connected in refrigerant storage tank (10) to with refrigerant import (3) union coupling. The device does not change the existing process for preparing fluorine by electrolysis and can achieve the effect of reducing the cost.
Description
Technical Field
The utility model relates to an electrolytic bath for industrial electrolytic fluorine production.
Background
At present, fluorine production by fluorine chemical and nuclear chemical electrolysis is mainly an electrolysis method, electrolyte is a molten mixture prepared from potassium bifluoride and anhydrous hydrogen fluoride, fluorine gas is generated at an electrolysis anode, and hydrogen gas is generated at a cathode. The temperature of the electrolytic bath is between 80 and 130 ℃, and the temperature is far higher than the boiling point of HF. Therefore, a certain amount of HF is entrained in the anode fluorine gas and the hydrogen gas generated at the cathode of the electrolytic cell, and the content of the hydrogen fluoride is about 10%.
At present, fluorine anode fluorine gas produced by electrolysis and HF carried in cathode hydrogen gas are removed, a treatment mode of absorbing hydrogen-producing fluorine acid by circulating water or directly absorbing alkali liquor is mainly adopted, the problems of corrosion prevention of pipeline equipment, hydrogen explosion prevention, standard emission after HF purification and the like need to be solved, the treatment process flow is complex, more equipment is needed, and the treatment cost is high. The method also comprises the steps of removing or reducing the content of hydrogen fluoride in fluorine gas and hydrogen by adopting a low-temperature condensing device, arranging the low-temperature condensing device in the subsequent process of the fluorine-making electric tank, liquefying and condensing the hydrogen fluoride, then storing the hydrogen fluoride in a storage tank, and recycling the recovered hydrogen fluoride. Therefore, how to adopt a convenient, simple and easy-to-operate method for reducing the content of HF in fluorine gas and hydrogen gas is a difficulty in the process of fluorine-making electric tank.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the patent is to provide a fluorine-making electrolytic cell with a hydrogen fluoride recovery function.
In order to reduce the hydrogen fluoride content that smugglies in the hydrogen and the fluorine gas that electrolytic cell negative and positive pole produced to adopt effectual mode to recycle the hydrogen fluoride of retrieving, the technical scheme of the utility model is: a fluorine-making electrolytic cell with hydrogen fluoride recovery function, a carbon anode 9 and a cathode-anode separation apron board 2 are arranged in an electrolytic cell 1, and the electrolytic cell 1 is divided into a cathode chamber and an anode chamber by the cathode-anode separation apron board 2; the cathode condensation tube bundle 5 is arranged outside the hydrogen outlet pipe of the electrolytic cell, the anode condensation tube bundle 7 is arranged outside the fluorine outlet pipe, the refrigerant inlet pipe 3 is respectively connected to the bottom of the cathode condensation tube bundle 5 and the bottom of the anode condensation tube bundle 7, the refrigerant outlet pipe 8 is led out from the upper part of the cathode condensation tube bundle 5 and the upper part of the anode condensation tube bundle 7 and then connected to the refrigerant storage tank 10, and the refrigerant power pump 11 is connected with the refrigerant storage tank 10 and is connected with the refrigerant inlet pipe 3.
The cathode condensation tube bundle or the anode condensation tube bundle can be a sleeve tube bundle, a spiral pipeline or other structures which can make the hydrogen fluoride directly flow back into the electric tank after being condensed. The material of the condensation tube bundle is nickel material, monel or other materials which can resist the corrosion of hydrogen fluoride.
The device makes the refrigerant circulation flow in the refrigerant storage tank through refrigerant power pump, realizes the cooling function to hydrogen outlet pipe and fluorine gas outlet pipe.
This electrolysis trough passes through the condensation tube bank that electrolysis trough anode outlet and cathode outlet pipe set up and can be with the hydrogen fluoride gas condensation liquefaction reflux that smugglies in fluorine gas and the hydrogen inside the electric cell, directly is used for the raw materials of electrolysis fluorine preparation, has improved anhydrous hydrogen fluoride's effective utilization, has reduced hydrogen fluoride's purification cost, and it is with low costs to have reduced environmental pollution treatment. By adopting the device provided by the application, the content of hydrogen fluoride carried in fluorine gas or hydrogen gas can be reduced from 10% to 3-5%, and the utilization rate of the hydrogen fluoride is improved. The cell reduces the problem of entrained hydrogen fluoride content in fluorine and hydrogen.
Compared with the prior art, the utility model has the characteristics that:
1. the structure of the conventional electrolytic cell is not fundamentally changed, and only the hydrogen fluoride reflux condensation tube bundle is arranged at the inlet and outlet pipes of the electrolytic cell, so that the conventional process for preparing fluorine by electrolysis is not changed, and the effect of reducing the cost can be achieved.
2. The condensation tube bundle arranged at the anode outlet and the cathode outlet of the electrolytic cell liquefies, condenses and refluxes the hydrogen fluoride gas carried in the fluorine gas and the hydrogen gas into the electrolytic cell, so that the raw material for electrolyzing and preparing fluorine in the electrolytic cell by condensing and recovering the HF carried in the fluorine gas and the hydrogen gas can be obtained, and an HF condensation and recovery device and a storage device for recovered hydrogen fluoride do not need to be separately arranged in the subsequent process.
Drawings
FIG. 1 is a schematic view of the fluorine-producing electrolytic cell of the present invention.
The electrolytic cell comprises an electrolytic cell 1, an electrolytic cell 2, an anode-cathode isolation apron plate 3, a refrigerant inlet pipe 4, a hydrogen outlet 5, a cathode condensation tube bundle 6, a fluorine outlet 7, an anode condensation tube bundle 8, a refrigerant outlet pipe 9, a carbon anode 10, a refrigerant storage tank 11 and a refrigerant power pump
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the embodiments of the present invention are not limited thereto.
As shown in figure 1, a fluorine-making electrolytic cell with hydrogen fluoride recovery function, wherein a carbon anode 9 and a cathode-anode separation apron board 2 are arranged in the electrolytic cell 1, and the electrolytic cell 1 is divided into a cathode chamber and an anode chamber by the cathode-anode separation apron board 2; the cathode condensation tube bundle 5 is arranged outside the hydrogen outlet pipe of the electrolytic cell, the anode condensation tube bundle 7 is arranged outside the fluorine outlet pipe, the refrigerant inlet pipe 3 is respectively connected to the bottom of the cathode condensation tube bundle 5 and the bottom of the anode condensation tube bundle 7, the refrigerant outlet pipe 8 is led out from the upper part of the cathode condensation tube bundle 5 and the upper part of the anode condensation tube bundle 7 and then connected to the refrigerant storage tank 10, and the refrigerant power pump 11 is connected to the refrigerant storage tank 10 and connected with the refrigerant inlet pipe 3.
The cathode condensation tube bundle and the anode condensation tube bundle are sleeve tube bundles, spiral pipelines or other structures which can lead the hydrogen fluoride to directly flow back into the electric tank after being condensed. The condensation tube bundle is made of nickel, monel or other materials which are resistant to hydrogen fluoride corrosion, and the cathode-anode isolation skirtboard 2 is made of nickel, monel or other materials which are resistant to hydrogen fluoride corrosion.
The condensing tube bundle is internally introduced with hydrogen fluoride for condensing and recovering a refrigerant, the temperature of the refrigerant is controlled below 19 ℃, and the hydrogen fluoride gas condensate is liquid and then flows back to the fluorine-making electrolytic cell, so that the utilization rate of anhydrous hydrogen fluoride is improved, and the post-processing cost of the process and the environmental pollution are reduced. Therefore, the temperature of the condensate must be kept below 19 ℃, preferably controlled between-45 ℃ and 0 ℃.
The refrigerants are ethylene glycol-water mixed liquid, salt water mixture and the like, and the content of the hydrogen fluoride in the fluorine gas and the hydrogen gas after condensation treatment is counted and detected, so that the content of the hydrogen fluoride is reduced from 10% to 3-5%, and the difficulty and the production cost of the subsequent HF treatment process of the fluorine-making electric tank are greatly reduced.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and it is intended that the present invention cover all modifications, equivalents, and alternatives falling within the scope of the present invention as defined by the appended claims.
Claims (5)
1. A fluorine-making electrolytic cell with a hydrogen fluoride recovery function is characterized in that a carbon anode (9) and a cathode-anode separation skirt board (2) are arranged in an electrolytic cell (1), and the electrolytic cell (1) is divided into a cathode chamber and an anode chamber by the cathode-anode separation skirt board (2); be provided with cathode condensation tube bank (5) outside the electrolysis trough hydrogen outlet pipe, fluorine outlet pipe is provided with on anode condensation tube bank (7) outward, refrigerant import pipe (3) are connected respectively in cathode condensation tube bank (5) bottom and anode condensation tube bank (7) bottom, refrigerant outlet pipe (8) are drawn forth by cathode condensation tube bank (5) upper portion and anode condensation tube bank (7) upper portion and are merged the back and connect in refrigerant storage tank (10), refrigerant power pump (11) are connected in refrigerant storage tank (10) to be connected with refrigerant import pipe (3).
2. Electrolytic cell for the production of fluorine according to claim 1, characterized in that the cathode condenser bundles (5) or the anode condenser bundles (7) are tube bundles of the sleeve type, spiral pipes.
3. The fluorine-producing electrolytic cell according to claim 1, characterized in that the cathode condenser tube bundle (5) or the anode condenser tube bundle (7) is made of a material resistant to corrosion by hydrogen fluoride.
4. Electrolytic cell for the production of fluorine according to claim 3, characterized in that the cathode condenser bundles (5) or the anode condenser bundles (7) are of nickel or monel.
5. Electrolytic cell for the production of fluorine according to claim 1, characterized in that the cathode condenser bundles (5) or the anode condenser bundles (7) are internally fed with a coolant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122518379.3U CN217579086U (en) | 2021-10-13 | 2021-10-13 | Fluorine-making electrolytic cell with hydrogen fluoride recovery function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122518379.3U CN217579086U (en) | 2021-10-13 | 2021-10-13 | Fluorine-making electrolytic cell with hydrogen fluoride recovery function |
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| Publication Number | Publication Date |
|---|---|
| CN217579086U true CN217579086U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122518379.3U Active CN217579086U (en) | 2021-10-13 | 2021-10-13 | Fluorine-making electrolytic cell with hydrogen fluoride recovery function |
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| CN (1) | CN217579086U (en) |
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2021
- 2021-10-13 CN CN202122518379.3U patent/CN217579086U/en active Active
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