CN217921888U - Production line is refined to high-purity difluorochloroethane of low moisture - Google Patents
Production line is refined to high-purity difluorochloroethane of low moisture Download PDFInfo
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- CN217921888U CN217921888U CN202221772521.5U CN202221772521U CN217921888U CN 217921888 U CN217921888 U CN 217921888U CN 202221772521 U CN202221772521 U CN 202221772521U CN 217921888 U CN217921888 U CN 217921888U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model relates to a refined production line of high-purity difluorochloroethane of low moisture, the degasser middle part inserts the crude inlet pipe, the degasser top sets up the degasser condenser, degasser condenser top connects the difluoroethane storage tank, degasser bottom sets up the degasser reboiler, the degasser reboiler connects the rectifying column lower part, the rectifying column bottom sets up the rectification reboiler, the rectifying column top connects rectifying column condenser lower part, rectifying column reboiler top connects the difluoroethane storage tank, rectifying column condenser bottom divides two tunnel ejection of compact through the sampler, the ejection of compact of the same kind connects rectifying column upper portion through the return valve, another way connects the molecular sieve desicator, the ejection of compact of molecular sieve desicator connects into the finished product metering tank, finished product metering tank bottom is through the moisture content tester, two tunnel of finished product pump branch, connect the difluorochloroethane storage tank all the way, another way connects back to finished product metering tank top, finished product metering tank top still returns rectifying column condenser bottom through ending the valves. The production line has good moisture removal effect and can remove difluoroethane for full purification.
Description
Technical Field
The utility model relates to a refined production line, a refined production line of high-purity difluorochloroethane of low moisture specifically says so.
Background
Difluorochloroethane is a raw material for producing vinylidene fluoride which is one of three fluorine polymerization monomers, vinylidene fluoride manufacturers at home and abroad have very high requirements on the quality of the difluorochloroethane, and particularly, the control on small indexes such as moisture, non-condensable gas, oxygen content and raw material evaporation residue is very strict. In the existing chemical production for producing difluorochloroethane by using difluoroethane as a raw material and chlorine, the effects of reaction, degassing and rectification are poor in the process of filling the difluoroethane in a finished product storage tank through a finished product filling pump, wherein most of the water content control is that water is directly removed through a dryer and the difluoroethane is removed through degassing.
Disclosure of Invention
The utility model provides a simple structure, moisture content get rid of effectually, fully reduce the water content, compromise difluoroethane and get rid of abundant low moisture high-purity difluorochloroethane and refine the production line.
The utility model adopts the technical proposal that: a production line is refine to high-purity difluorochloroethane of low moisture, its characterized in that: the device comprises a degassing tower, a rectifying tower, a molecular sieve dryer and a finished product metering tank, wherein a crude product feeding pipe is connected to the middle of the degassing tower, a degassing tower condenser is arranged at the top of the degassing tower, the top of the degassing tower condenser is connected with a difluoroethane storage tank through a stop valve, a degassing tower reboiler is arranged at the bottom of the degassing tower, the bottom of the rectifying tower reboiler is connected with the lower part of the rectifying tower through the stop valve, the top of the rectifying tower is connected with the difluoroethane storage tank through the stop valve, the bottom of the rectifying tower condenser is divided into two paths of discharging through a sampler, one path of discharging is connected with the upper part of the rectifying tower through a return valve, the other path of discharging is connected with the molecular sieve dryer through a stop valve and a flow meter, the discharging of the molecular sieve dryer is connected with the finished product metering tank, the bottom of the finished product metering tank is divided into two paths through a moisture tester and a finished product pump, one path of discharging is connected with the difluorochloroethane storage tank, the other path of discharging is connected with the top of the finished product metering tank, and the top of the finished product metering tank is also connected with the bottom of the rectifying tower through the condenser through the stop valve.
Furthermore, the degassing tower condenser and the rectifying tower condenser are water-cooled condensers.
Further, the reboiler of the degassing tower and the reboiler of the rectifying tower are steam reboilers.
Further, the molecular sieve dryer is a double-dryer structure for standby.
Further, a jacket is arranged outside the finished product metering tank.
Furthermore, the stop valve group comprises an electric stop valve and an adjusting valve group, wherein the electric stop valve is connected with the adjusting valve group in series, the adjusting valve group is connected in parallel, one way is a through stop valve, and the other way is a control valve.
Furthermore, emptying valves are arranged at the bottoms of the degasser reboiler and the rectifying tower reboiler.
The method comprises the steps of feeding a difluorochloroethane crude product containing water and difluoroethane into a degassing tower through a crude product feeding pipe, boosting the difluorochloroethane crude product through a reboiler of the degassing tower to increase the boiling point, combining the difluoroethane gas with a condenser of the degassing tower, controlling the difluoroethane gas phase to be fed into a difluoroethane storage tank, feeding a difluorochloroethane liquid phase into a rectifying tower through a return valve, feeding the difluorochloroethane liquid phase into the rectifying tower through the top, repeating the rectifying operation through a return valve, further increasing the removal rate of difluoroethane, opening the stop valve to feed a molecular sieve dryer after the sampling of a sampler is qualified, performing a standby operation to improve the stability and safety of the operation, feeding the difluorochloroethane liquid phase into a finished product metering tank after the drying, measuring the water content of the finished product by a water content tester, returning the difluoroethane liquid phase to a finished product metering tank by a finished product pump if the difluoroethane liquid phase is unqualified, heating the difluoroethane liquid phase by a jacket of the finished product metering tank to be integrally fed into the bottom of the condenser of the rectifying tower, facilitating high-precision condensation to remove difluoroethane, feeding the difluoroethane to the molecular sieve dryer, further reducing the water content and the difluoroethane content, and the difluoroethane content of the difluoroethane after the difluoroethane, and connecting the difluoroethane to be qualified, connecting the finished product pump to be connected with the difluoroethane storage tank, effectively reducing the difluoroethane storage tank after the difluoroethane storage tank, and effectively reducing the purity, and improving the difluoroethane purity of difluoroethane and the difluoroethane purity of difluoroethane.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the device comprises a crude product feeding pipe 1, a degassing tower 2, a degassing condenser 3, a difluoroethane storage tank 4, a degassing tower reboiler 5, an emptying valve 6, an electric stop valve 7, a straight-through stop valve 8, a control valve 9, a rectifying tower 10, a rectifying tower reboiler 11, a rectifying tower condenser 12, a sampler 13, a return valve 14, a flowmeter 15, a molecular sieve dryer 16, a finished product metering tank 17, a jacket 18, a moisture tester 19 and a finished product pump 20.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 shows: a low-moisture high-purity difluorochloroethane refining production line comprises a crude product feeding pipe 1, a degassing tower 2, a degassing condenser 3, a difluoroethane storage tank 4, a degassing tower reboiler 5, a rectifying tower 10, a rectifying tower reboiler 11, a rectifying tower condenser 12, a sampler 13, a return valve 14, a flowmeter 15, a molecular sieve dryer 16, a finished product metering tank 17, a jacket 18, a moisture tester 19 and a finished product pump 20.
The crude product containing water and difluoroethane is prepared and produced by difluorochloroethane, the crude product containing water and difluoroethane is connected into the middle of a degassing tower 2 through a crude product feeding pipe 1, the top of the degassing tower 2 is provided with a degassing tower condenser 3, the top of the degassing tower condenser 3 is connected with a difluoroethane storage tank 4 through a stop valve, the bottom of the degassing tower reboiler 5 is connected with the lower part of a rectifying tower 10 through the stop valve, the bottom of the rectifying tower 10 is provided with a rectifying reboiler 11, the top of the rectifying tower 10 is connected with the lower part of a rectifying tower condenser 12, the top of the rectifying tower reboiler is connected with the difluoroethane storage tank through the stop valve, the bottom of the rectifying tower condenser is connected with a sampler 13 through two paths of discharging, one path of discharging is connected with the upper part of the rectifying tower 10 through a return valve 14, the other path is connected with a molecular sieve dryer 16 for one use through a stop valve group and a flow meter 15, the discharging of the molecular sieve dryer 16 is connected with a plurality of finished product metering tanks 17, a jacket 18 is arranged outside the finished product metering tank, the finished product metering tank is connected with the bottom of the finished product metering tank 18, the bottom of the finished product metering tank 18 through a tester 19 and a finished product pump 20, one path of the finished product metering tank is connected with the bottom of the condenser 12 through the finished product metering tank.
In this embodiment, the bottom of the reboiler is connected to a blow-off valve 6.
In the embodiment, the stop valve group comprises an electric stop valve 7, a straight-through stop valve 8 and a control valve 9, the electric stop valve 7 is connected in series with the straight-through stop valve 8 and the control valve 9 which are connected in parallel, so that the stop control of chemical production is effectively met, and meanwhile, the regulation and control requirements are met; stop valves can be additionally arranged in the front and the back of the control valve 9, so that the stability and the safety of the equipment are further improved.
On this embodiment basis, all can set up stop valve group on each pipeline for chemical industry is carried, the regulation and control demand of safety in production. In this embodiment, the degasser condenser and the rectifier condenser are preferably water-cooled condensers. The reboiler of the degasser tower and the reboiler of the rectifying tower are steam reboilers. Is favorable for energy-saving and environment-friendly chemical production.
On the basis of the embodiment, a pipeline for returning the finished product metering tank to the condenser of the rectifying tower extends into the lower part or the bottom of the finished product metering tank and can be pumped back.
Claims (7)
1. A refined production line of high-purity difluorochloroethane of low moisture, its characterized in that: the device comprises a degassing tower, a rectifying tower, a molecular sieve dryer and a finished product metering tank, wherein a crude product feeding pipe is connected to the middle of the degassing tower, a degassing tower condenser is arranged at the top of the degassing tower, the top of the degassing tower condenser is connected with a difluoroethane storage tank through a stop valve, a degassing tower reboiler is arranged at the bottom of the degassing tower, the bottom of the rectifying tower reboiler is connected with the lower part of the rectifying tower through the stop valve, the top of the rectifying tower is connected with the difluoroethane storage tank through the stop valve, the bottom of the rectifying tower condenser is divided into two paths of discharging through a sampler, one path of discharging is connected with the upper part of the rectifying tower through a return valve, the other path of discharging is connected with the molecular sieve dryer through a stop valve and a flow meter, the discharging of the molecular sieve dryer is connected with the finished product metering tank, the bottom of the finished product metering tank is divided into two paths through a moisture tester and a finished product pump, one path of discharging is connected with the difluorochloroethane storage tank, the other path of discharging is connected with the top of the finished product metering tank, and the top of the finished product metering tank is also connected with the bottom of the rectifying tower through the condenser through the stop valve.
2. The low-moisture high-purity difluorochloroethane refining production line as claimed in claim 1, which is characterized in that: the degassing tower condenser and the rectifying tower condenser are water-cooled condensers.
3. The low-moisture high-purity difluorochloroethane refining production line as claimed in claim 1, which is characterized in that: the reboiler of the degassing tower and the reboiler of the rectifying tower are steam reboilers.
4. The low-moisture high-purity difluorochloroethane refining production line as claimed in claim 1, which is characterized in that: the molecular sieve dryer is a double-dryer structure for standby use.
5. The low-moisture high-purity difluorochloroethane refining production line as claimed in claim 1, which is characterized in that: and a jacket is arranged outside the finished product metering tank.
6. The low-moisture high-purity difluorochloroethane refining production line as claimed in claim 1, which is characterized in that: the stop valve group comprises an electric stop valve and an adjusting valve group, the electric stop valve is connected with the adjusting valve group in series, the adjusting valve group is connected in parallel, one way is a straight-through stop valve, and the other way is a control valve.
7. The low-moisture high-purity difluorochloroethane refining production line as claimed in claim 1, which is characterized in that: and emptying valves are arranged at the bottoms of the degassing tower reboiler and the rectifying tower reboiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221772521.5U CN217921888U (en) | 2022-07-11 | 2022-07-11 | Production line is refined to high-purity difluorochloroethane of low moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221772521.5U CN217921888U (en) | 2022-07-11 | 2022-07-11 | Production line is refined to high-purity difluorochloroethane of low moisture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217921888U true CN217921888U (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221772521.5U Active CN217921888U (en) | 2022-07-11 | 2022-07-11 | Production line is refined to high-purity difluorochloroethane of low moisture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217921888U (en) |
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2022
- 2022-07-11 CN CN202221772521.5U patent/CN217921888U/en active Active
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