CN211521584U - Hydrofluoric acid rectification, degasser - Google Patents
Hydrofluoric acid rectification, degasser Download PDFInfo
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- CN211521584U CN211521584U CN201922456895.0U CN201922456895U CN211521584U CN 211521584 U CN211521584 U CN 211521584U CN 201922456895 U CN201922456895 U CN 201922456895U CN 211521584 U CN211521584 U CN 211521584U
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Abstract
The utility model provides a hydrofluoric acid rectification, degasser, hydrofluoric acid rectification, degasser include rectifying column and degasser, rectifying column's top is provided with first condenser, the top of degasser is provided with the second condenser, rectifying column and degasser pass through the gas piping connection, the export of first condenser is connected to the inlet end of gas piping, the end of giving vent to anger of gas piping is connected in the body of degasser. The technical scheme adopts a gas phase feeding mode, and the hydrofluoric acid rectified in the rectifying tower is input into the degassing tower in a gas form, naturally liquefied and purified in the condensation process of the degassing tower. According to the technical scheme, hydrofluoric acid does not need to be condensed and reboiled, so that the condensing energy consumption of the rectifying tower and the heating energy consumption of the degassing tower can be reduced, a large amount of resources are saved, and the economic benefit is improved.
Description
Technical Field
The utility model relates to a fluorine chemical industry field, in particular to hydrofluoric acid rectification, degasser.
Background
The hydrogen fluoride is colorless liquid or gas, has the molecular weight of 20.01, is easily dissolved in water, has the boiling point of 19.5 ℃, and is not combustible. The traditional hydrofluoric acid rectifying and degassing device is shown in figure 1:
feeding the crude HF condensate into a rectifying tower, reboiling and removing H2SO4Equal weight components, the main component at the bottom of the tower is H2SO4、H2O; the temperature at the top of the tower is below 19.5 ℃, and a liquid hydrofluoric acid crude product is obtained.
The liquid hydrofluoric acid crude product enters a degassing tower, and SO is removed after reboiling2、SiF4And (3) light components: the temperature at the bottom of the degassing tower is below 19.5 ℃, and the temperature at the top of the degassing tower is above-10 ℃. The tower top is SO2、SiF4And gas and tower bottoms are the anhydrous hydrofluoric acid product.
In the existing anhydrous hydrofluoric acid production process, liquid hydrofluoric acid is fed from a rectifying tower to a degassing tower, a large amount of frozen salt water is used for condensing a gaseous hydrofluoric acid crude product to a liquid hydrofluoric acid crude product on the top of the rectifying tower, and the power consumption is large; in the degassing process, a large amount of steam is used for heating the liquid hydrofluoric acid crude product at the tower kettle of the degassing tower, and the steam consumption is large, and the coal consumption is high; the production process causes a great deal of energy consumption.
Disclosure of Invention
Therefore, it is necessary to provide an energy-saving hydrofluoric acid rectifying and degassing device. For realizing above-mentioned purpose, the inventor provides a hydrofluoric acid rectification, degasser, hydrofluoric acid rectification, degasser include rectifying column and degasser, the top of rectifying column is provided with first condenser, the top of degasser is provided with the second condenser, rectifying column and degasser pass through the gas piping connection, the export of first condenser is connected to the inlet end of gas piping, the end of giving vent to anger of gas piping is connected in the shaft body of degasser.
Further, the gas outlet end is arranged on one side of the degassing tower close to the second condenser.
Further, the condensing temperature of the first condenser is set to be 20-25 ℃.
Further, the condensing temperature of the second condenser is set to-5 to 15 ℃.
Further, the first condenser and the second condenser use chilled brine as a condensing medium.
Further, a discharge valve is arranged at the bottom of the degassing tower.
Further, the gas pipeline is hermetically connected with the rectifying tower and the degassing tower.
Further, a negative pressure device is arranged in a tower top exhaust pipeline of the degassing tower.
Further, the inner wall of the condenser is provided with a temperature probe.
Further, a third condenser is arranged at the lower end of the degassing tower.
Different from the prior art, the technical scheme adopts a gas phase feeding mode, and the hydrofluoric acid rectified in the rectifying tower is input into the degassing tower in a gas form, naturally liquefied and purified in the condensation process of the degassing tower. According to the technical scheme, hydrofluoric acid does not need to be condensed and reboiled, so that the condensing energy consumption of the rectifying tower and the heating energy consumption of the degassing tower can be reduced, a large amount of resources are saved, and the economic benefit is improved.
Drawings
FIG. 1 is a view of a hydrofluoric acid refining and degassing apparatus according to the prior art;
FIG. 2 shows a hydrofluoric acid refining and degassing apparatus according to an embodiment.
Description of reference numerals:
1. a rectifying tower is arranged in the tower body,
11. a first condenser for the first time, a second condenser for the second time,
2. a degassing tower is arranged in the tower body,
21. a second condenser for the second air conditioner,
22. a third condenser, a second condenser and a third condenser,
23. a third condenser, a second condenser and a third condenser,
3. a gas pipeline.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 2, the hydrofluoric acid rectifying and degassing device of the present embodiment includes a rectifying tower 1 and a degassing tower 2, a first condenser 11 is disposed above the rectifying tower 1, a second condenser 21 is disposed above the degassing tower 2, the rectifying tower 1 and the degassing tower 2 are connected by a gas pipeline 3, an air inlet end of the gas pipeline 3 is connected to an outlet of the first condenser 11, and an air outlet end of the gas pipeline 3 is connected to a side of the degassing tower 2 close to the second condenser 21. The gas pipeline 3 is hermetically connected with the rectifying tower 1 and the degassing tower 2, so that hydrofluoric acid leakage in the production process is avoided.
In this embodiment, the condensing temperature of the first condenser is set to 20-25 ℃, the inner wall of the condenser is provided with a temperature probe, the temperature of the condenser can be monitored at any time, the temperature of the condenser is adjusted by adjusting the temperature and the flow rate of a condensing medium, and the boiling point temperature of hydrogen fluoride is 19.5 ℃, so that the hydrogen fluoride exists in a gas form at the temperature of 20 ℃ of the condenser and enters the degassing tower from a gas pipeline, and a small amount of unvaporized liquefied hydrogen fluoride enters the rectifying tower again from a liquid outlet arranged at the lower part of the condenser for circulation.
In this example, the temperature of the bottom of the rectifying column was 30 ℃ and the main component of the bottom was H2SO4、H2O, the tower bottom component can return to the front washing tower;
crude hydrofluoric acid gas (including SO)2、SiF4Equal light components) enter the degassing tower 2 from the gas outlet end of the gas pipeline 3, then upwards enter the second condenser 21, in the process of heat exchange in the second condenser 21, hydrofluoric acid gas is liquefied and drops to the bottom of the degassing tower to obtain a liquid hydrofluoric acid finished product, and the liquid hydrofluoric acid finished product is discharged from a discharge valve 23 arranged at the bottom of the tower. SO in the hydrofluoric acid crude gas2、SiF4Equal light components, because the condensation temperature of the second condenser is set to be-5-15 ℃, SiF4Has a boiling point of-86 ℃ and SO2Has a boiling point of-10 ℃ SO that the gas state continues to be maintained in the second condenser and the separation at the top of the column is SO2、SiF4And liquefying the hydrofluoric acid gas in the section of condenser, and dripping the hydrofluoric acid gas to the bottom of the degassing tower to obtain a liquid hydrofluoric acid finished product.
Finally, in order to prevent the re-gasification of hydrofluoric acid during high-temperature production, the temperature of the lower end of the degassing tower 2 is controlled to 19 ℃ or lower by a third condenser 22 provided at the lower end of the degassing tower 2.
In this embodiment, the first condenser and the second condenser use frozen brine as a condensing medium, and in other embodiments, ethylene glycol may be used as a condensing medium. In this example, the top SO of the degasser2、SiF4A negative pressure device is arranged in the exhaust pipeline; the negative pressure device can guide the hydrofluoric acid crude gas into a second condenser of the degassing tower.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the scope of the present invention.
Claims (10)
1. The utility model provides a hydrofluoric acid rectification, degasser, a serial communication port, hydrofluoric acid rectification, degasser include rectifying column and degasser, the top of rectifying column is provided with first condenser, the top of degasser is provided with the second condenser, rectifying column and degasser pass through the gas piping connection, the export of first condenser is connected to the inlet end of gas piping, the end of giving vent to anger of gas piping is connected in the body of degasser.
2. The hydrofluoric acid rectifying and degassing device according to claim 1, wherein the gas outlet end is disposed on a side of the degassing tower close to the second condenser.
3. The hydrofluoric acid rectifying and degassing apparatus according to claim 1, wherein the condensation temperature of the first condenser is set to 20-25 ℃.
4. The hydrofluoric acid rectifying and degassing apparatus according to claim 1, wherein the condensation temperature of the second condenser is set to-5-15 ℃.
5. The hydrofluoric acid rectifying and degassing apparatus according to claim 1, wherein the first condenser and the second condenser use chilled brine as a condensing medium.
6. The hydrofluoric acid rectifying and degassing device according to claim 1, wherein a discharge valve is arranged at the bottom of the degassing tower.
7. The hydrofluoric acid rectifying and degassing device of claim 1 wherein the gas pipeline is hermetically connected to the rectifying tower and the degassing tower.
8. The hydrofluoric acid rectifying and degassing device according to claim 1, wherein a negative pressure device is arranged in a tower top exhaust pipeline of the degassing tower.
9. The hydrofluoric acid rectifying and degassing device according to claim 1, wherein the inner wall of the condenser is provided with a temperature probe.
10. The hydrofluoric acid rectifying and degassing device according to claim 1, wherein a third condenser is provided at a lower end of the degassing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922456895.0U CN211521584U (en) | 2019-12-31 | 2019-12-31 | Hydrofluoric acid rectification, degasser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922456895.0U CN211521584U (en) | 2019-12-31 | 2019-12-31 | Hydrofluoric acid rectification, degasser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211521584U true CN211521584U (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922456895.0U Active CN211521584U (en) | 2019-12-31 | 2019-12-31 | Hydrofluoric acid rectification, degasser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211521584U (en) |
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2019
- 2019-12-31 CN CN201922456895.0U patent/CN211521584U/en active Active
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