CN211724740U - Rectifying still for rectifying and purifying difluoromono-chloroethane - Google Patents
Rectifying still for rectifying and purifying difluoromono-chloroethane Download PDFInfo
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- CN211724740U CN211724740U CN201922440859.5U CN201922440859U CN211724740U CN 211724740 U CN211724740 U CN 211724740U CN 201922440859 U CN201922440859 U CN 201922440859U CN 211724740 U CN211724740 U CN 211724740U
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Abstract
The utility model relates to a rectifying still for rectifying and purifying difluoromono-chloroethane, which comprises a lower still, an upper still and a shield pump, wherein the outer side of the lower still is provided with a jacket, a heat exchange medium is introduced into the jacket, and the bottom of the lower still is provided with a drain outlet; an exhaust pipe is arranged at the top of the upper kettle, a horizontal feeding spray pipe is inserted in the upper kettle, and a shield pump extracts mixed feed liquid from the lower kettle and sprays the mixed feed liquid from the feeding spray pipe; a liquid membrane separator is arranged between the upper kettle and the lower kettle, the upper bottom surface and the lower bottom surface of the liquid membrane separator are respectively connected with the corresponding surfaces of the upper kettle and the lower kettle through flanges, the liquid membrane separator is a shell-and-tube heat exchanger, a tube pass is communicated with the cavities of the upper kettle and the lower kettle, and circulating cooling water is introduced into the shell pass. The utility model has good separation effect by using the liquid membrane separator to separate the gas and the liquid; the liquid membrane separator is detachably arranged in the middle of the kettle body through a flange, so that the maintenance and the cleaning are convenient.
Description
Technical Field
The utility model relates to a chemical production field, concretely relates to difluoro monochloro ethane rectification cauldron for purification.
Background
The difluoromono-chloroethane is synthesized by the reaction of chlorine and difluoroethane and then under the catalysis of light. Difluoromonochloroethane products typically contain difluoroethane, difluoromonochloroethane, difluorochloroethane, difluorotrichloroethane, and the like. Other impurities need to be separated. In the prior art, a multistage distillation kettle and a rectification kettle are required to be matched, the purity of a final product is still not high, and 100 percent of complete separation is difficult to achieve.
Disclosure of Invention
An object of the utility model is to provide a can effectively separate purification difluoro monochloro ethane, and simple structure, the rectifying still is used in the rectification purification of difluoro monochloro ethane rectification of the mill's plant use of being convenient for.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
the rectifying still for rectifying and purifying the difluoromono-chloroethane comprises a lower still, an upper still and a shield pump, wherein a jacket is arranged on the outer side of the lower still, a heat exchange medium is introduced into the jacket, and a sewage outlet is formed in the bottom of the lower still; an exhaust pipe is arranged at the top of the upper kettle, a horizontal feeding spray pipe is inserted in the upper kettle, and the shielding pump extracts mixed feed liquid from the lower kettle and sprays out of the feeding spray pipe; the liquid membrane separator is a shell-and-tube heat exchanger, the tube pass is communicated with the cavities of the upper kettle and the lower kettle, and circulating cooling water is introduced into the shell pass.
Further, a distributor is arranged between the feeding spray pipe and the liquid membrane separator, and the distributor is installed in the upper kettle.
Further, the distributor comprises a circular orifice plate and vertical distribution pipes installed in each hole of the circular orifice plate.
Further, a liquid level meter is arranged on the side surface of the lower kettle.
Still further, the exhaust pipe is a double pipe cooler.
After taking above technical scheme, the beneficial effects of the utility model are that: the liquid membrane separator is used for carrying out gas-liquid separation on the mixed liquid, so that the separation effect is good; the liquid membrane separator is detachably arranged in the middle of the kettle body through a flange, so that the maintenance and the cleaning are convenient.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the device comprises a lower kettle 1, a liquid membrane separator 2, an upper kettle 3, a shield pump 4, a flange 5, a drain outlet 6, a liquid level meter 7, a jacket 8, a sleeve cooler 9, a feeding spray pipe 10 and a distributor 11.
Detailed Description
As shown in the figure, the rectifying still for rectifying and purifying difluoromono-chloroethane comprises a lower still 1, a liquid membrane separator 2, an upper still 3 and a shield pump 4. The liquid membrane separator 2 is arranged between the upper kettle 1 and the lower kettle 3. The upper surface and the lower surface of the liquid membrane separator 2 are both flange surfaces, and are connected with the upper kettle and the lower kettle through the flanges 5 and bolts, so that subsequent disassembly and maintenance are convenient. The liquid membrane separator 2 is a shell-and-tube heat exchanger, the tube side of the liquid membrane separator 2 is communicated with the cavities of the upper kettle 1 and the lower kettle 3, and hot water with the temperature of 40-70 ℃ is introduced into the shell side of the liquid membrane separator 2. There is drain 6 bottom cauldron 1 down, and cauldron 1 side-mounting has level gauge 7 down, is convenient for monitor the inside liquid level condition. The outer side of the lower kettle 1 is provided with a jacket 8, hot water with the temperature of 40-70 ℃ is filled in the jacket 8, mixed liquid in the lower kettle 1 is heated, difluoromono-chloroethane is gasified, and the mixed liquid is sequentially recovered from the top of the upper kettle 3 through a liquid membrane separator 2 and the upper kettle 3.
The top of the upper kettle 3 is provided with a vertical sleeve cooler 9, the length of the sleeve cooler 9 is 2 meters, and the inner diameter is 100-125 mm. The cooling water with the temperature of 20-30 ℃ is introduced into the sleeve cooler 9. A feeding spray pipe 10 and a distributor 11 are arranged in the upper kettle 3, and the distributor 11 is arranged in the upper kettle 3 and is positioned below the feeding spray pipe 10; the distributor 11 comprises a circular orifice plate and vertical distribution pipes mounted in each orifice of the circular orifice plate. The feeding spray pipe 10 is a horizontal pipeline, the feed liquid in the lower kettle 1 is pumped by the shield pump 4 and then is sent to the feeding spray pipe 10, after the feed liquid is sprayed out from the feeding spray pipe 10, the feed liquid is uniformly distributed by the distributor 11 below the feed liquid and flows downwards from the tube pass of the liquid film separator 2, and exchanges heat with the liquid film separator 2 for evaporation, difluoromono-chloroethane is gasified and flows upwards from the sleeve cooler 9 of the upper kettle and then is sent to the lower-level condenser for recovery, and a small amount of gaseous difluorochloroethane, difluorotrichloroethane and difluorochloroethane are liquefied in the sleeve cooler 9 and flow back to the lower kettle 1. One circulation is completed, and after multiple circulations, the difluoromono-chloroethane in the feed liquid can be completely separated.
Claims (5)
1. The rectifying still for rectifying and purifying the difluoromono-chloroethane comprises a lower still, an upper still and a shield pump, wherein a jacket is arranged on the outer side of the lower still, a heat exchange medium is introduced into the jacket, and a sewage outlet is formed in the bottom of the lower still; an exhaust pipe is arranged at the top of the upper kettle, a horizontal feeding spray pipe is inserted in the upper kettle, and the shielding pump extracts mixed feed liquid from the lower kettle and sprays out of the feeding spray pipe; the device is characterized in that a liquid membrane separator is arranged between the upper kettle and the lower kettle, the upper bottom surface and the lower bottom surface of the liquid membrane separator are respectively connected with the corresponding surfaces of the upper kettle and the lower kettle through flanges, the liquid membrane separator is a shell-and-tube heat exchanger, the tube side of the shell-and-tube heat exchanger is communicated with the cavity of the upper kettle and the cavity of the lower kettle, and circulating cooling water is introduced into the shell side of the shell-and-tube heat exchanger.
2. The rectifying still for rectifying and purifying difluoromonochloroethane as claimed in claim 1, wherein a distributor is arranged between the feeding nozzle and the liquid membrane separator, and the distributor is installed in the upper still.
3. The rectifying still for rectifying and purifying difluoromonochloroethane as claimed in claim 2, wherein the distributor comprises a circular orifice plate and vertical distribution pipes installed in each orifice of the circular orifice plate.
4. The rectifying still for rectifying and purifying difluoromonochloroethane as claimed in claim 1, wherein a liquid level meter is installed on the side surface of the lower still.
5. The rectifying still for rectifying and purifying difluoromonochloroethane according to claim 1, wherein the exhaust pipe is a double pipe cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922440859.5U CN211724740U (en) | 2019-12-30 | 2019-12-30 | Rectifying still for rectifying and purifying difluoromono-chloroethane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922440859.5U CN211724740U (en) | 2019-12-30 | 2019-12-30 | Rectifying still for rectifying and purifying difluoromono-chloroethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211724740U true CN211724740U (en) | 2020-10-23 |
Family
ID=72872002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922440859.5U Active CN211724740U (en) | 2019-12-30 | 2019-12-30 | Rectifying still for rectifying and purifying difluoromono-chloroethane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211724740U (en) |
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2019
- 2019-12-30 CN CN201922440859.5U patent/CN211724740U/en active Active
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