CN210214800U - Recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas - Google Patents
Recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas Download PDFInfo
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- CN210214800U CN210214800U CN201920893264.2U CN201920893264U CN210214800U CN 210214800 U CN210214800 U CN 210214800U CN 201920893264 U CN201920893264 U CN 201920893264U CN 210214800 U CN210214800 U CN 210214800U
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- tail gas
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- hydrogen fluoride
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- lithium hexafluorophosphate
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Abstract
The utility model discloses a recovery device of hydrogen fluoride in lithium hexafluorophosphate tail gas, which comprises a primary condenser, a secondary condenser, a buffer gas bag, a condensation receiving tank, a tail gas header pipe and a tail gas absorption system; the tail gas main pipe is connected with a first-stage condenser; a gas phase outlet pipeline of the primary condenser is connected with the secondary condenser; a gas phase outlet pipeline of the secondary condenser buffers a gas bag; the buffer gas bag is connected with nitrogen, and the outlet of the buffer gas bag is connected with a tail gas absorption system; and liquid phase outlet pipelines of the first-stage condenser and the second-stage condenser are connected with a condensation receiving tank. The utility model relates to a recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas carries out recycle with the hydrogen fluoride in a large amount of hydrogen chloride and the hydrogen fluoride mist that traditional preparation lithium hexafluorophosphate in-process produced, has effectively reduced the manufacturing cost of lithium hexafluorophosphate, has reduced the mixed acid volume of tail gas absorption system output again, reduces the input of follow-up mixed acid processing procedure.
Description
Technical Field
The utility model relates to a recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas.
Background
In the existing lithium hexafluorophosphate production process, a large amount of mixed gas of hydrogen chloride and hydrogen fluoride can be generated to enter a tail gas absorption system in a reaction stage, the consumption of hydrogen fluoride is high, the mixed acid output by the tail gas system is large, and adverse effects are caused on the production cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas aims at carrying out recycle with the hydrogen fluoride in a large amount of hydrogen chloride and the hydrogen fluoride mist that traditional preparation lithium hexafluorophosphate in-process produced, has effectively reduced the manufacturing cost of lithium hexafluorophosphate, has reduced the mixed acid volume of tail gas absorption system output again, reduces the input of follow-up mixed acid processing procedure.
In order to achieve the purpose, the technical scheme of the utility model is to design a recovery device of hydrogen fluoride in lithium hexafluorophosphate tail gas, which comprises a primary condenser, a secondary condenser, a buffer gas bag, a condensation receiving tank, a tail gas header pipe and a tail gas absorption system; the tail gas main pipe is connected with a first-stage condenser; a gas phase outlet pipeline of the primary condenser is connected with the secondary condenser; a gas phase outlet pipeline of the secondary condenser buffers a gas bag; the buffer gas bag is connected with nitrogen, and the outlet of the buffer gas bag is connected with a tail gas absorption system; and liquid phase outlet pipelines of the first-stage condenser and the second-stage condenser are connected with a condensation receiving tank.
Preferably, liquid phase outlet pipelines of the first-stage condenser and the second-stage condenser are U-shaped pipelines, so that the situation of gas mixing of the first-stage condenser and the second-stage condenser is avoided.
Preferably, valves are arranged on the tail gas main pipe, the gas phase outlet of the first-stage condenser, the gas phase outlet pipeline of the second-stage condenser, the inlet and the outlet of the buffer gas bag, and the liquid phase outlet pipelines of the first-stage condenser and the second-stage condenser.
The utility model has the advantages and the beneficial effects that: the utility model relates to a recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas, utilize hydrogen chloride, the hydrogen fluoride boiling point is different, lower the temperature for the mist, thereby make wherein hydrogen fluoride condense into liquid and separate, simultaneously for guaranteeing the condensation effect, adopt the mode of second grade condensation, and it is curved to make the U-shaped at liquid phase backflow pipeline, reach and avoid the one-level, the gaseous condition of bunching of second grade condenser, the hydrogen fluoride liquid of refluence flow drops into lithium hexafluorophosphate preparation in-process once more, thereby effectively reduce the hydrogen fluoride unit consumption, and because the total tolerance that gets into the tail gas system reduces, consequently, the mixed acid total amount that produces also correspondingly reduces, effectively reduce the cost of follow-up treatment mixed acid.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The system comprises a primary condenser 1, a secondary condenser 2, a buffer air bag 3, a condensation receiving tank 4, a tail gas main pipe 5, a tail gas absorption system 6, a tail gas inflow direction A, a refrigerant flowing direction B and a normal cooling direction C.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example (b):
a recovery device for hydrogen fluoride in lithium hexafluorophosphate tail gas comprises a primary condenser 1, a secondary condenser 2, a buffer gas bag 3, a condensation receiving tank 4, a tail gas main pipe 5 and a tail gas absorption system 6; the tail gas main pipe 5 is connected with the primary condenser 1; the gas phase outlet pipeline of the primary condenser 1 is connected with the secondary condenser 2; a gas phase outlet pipeline of the secondary condenser 2 buffers a gas bag 3; the buffer gas bag 3 is connected with nitrogen, and the outlet of the buffer gas bag 3 is connected with a tail gas absorption system 6; and liquid phase outlet pipelines of the first-stage condenser 1 and the second-stage condenser 2 are connected with a condensation receiving tank 4.
And liquid phase outlet pipelines of the first-stage condenser 1 and the second-stage condenser 2 are U-shaped pipelines.
And valves are arranged on the tail gas main pipe 5, the gas phase outlet of the primary condenser 1, the gas phase outlet pipeline of the secondary condenser 2, the inlet and outlet of the buffer gas bag 3 and the liquid phase outlet pipelines of the primary condenser 1 and the secondary condenser 2.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The utility model provides a recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas which characterized in that: the system comprises a primary condenser, a secondary condenser, a buffer gas bag, a condensation receiving tank, a tail gas main pipe and a tail gas absorption system; the tail gas main pipe is connected with a first-stage condenser; a gas phase outlet pipeline of the primary condenser is connected with the secondary condenser; a gas phase outlet pipeline of the secondary condenser buffers a gas bag; the buffer gas bag is connected with nitrogen, and the outlet of the buffer gas bag is connected with a tail gas absorption system; and liquid phase outlet pipelines of the first-stage condenser and the second-stage condenser are connected with a condensation receiving tank.
2. The device for recovering hydrogen fluoride from lithium hexafluorophosphate tail gas as claimed in claim 1, wherein: and liquid phase outlet pipelines of the first-stage condenser and the second-stage condenser are U-shaped pipelines.
3. The device for recovering hydrogen fluoride from lithium hexafluorophosphate tail gas as claimed in claim 1, wherein: and valves are arranged on the tail gas main pipe, the gas-phase outlet of the primary condenser, the gas-phase outlet pipeline of the secondary condenser, the inlet and outlet of the buffer gas bag, and the liquid-phase outlet pipelines of the primary condenser and the secondary condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920893264.2U CN210214800U (en) | 2019-06-14 | 2019-06-14 | Recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920893264.2U CN210214800U (en) | 2019-06-14 | 2019-06-14 | Recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210214800U true CN210214800U (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920893264.2U Active CN210214800U (en) | 2019-06-14 | 2019-06-14 | Recovery unit of hydrogen fluoride in lithium hexafluorophosphate tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210214800U (en) |
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2019
- 2019-06-14 CN CN201920893264.2U patent/CN210214800U/en active Active
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