CN204198636U - Distillation residual liquid recycle device in a kind of difluorochloromethane production - Google Patents
Distillation residual liquid recycle device in a kind of difluorochloromethane production Download PDFInfo
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- CN204198636U CN204198636U CN201420504589.4U CN201420504589U CN204198636U CN 204198636 U CN204198636 U CN 204198636U CN 201420504589 U CN201420504589 U CN 201420504589U CN 204198636 U CN204198636 U CN 204198636U
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- chloroform
- difluorochloromethane
- raffinate
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Abstract
The utility model discloses distillation residual liquid recycle device in the production of a kind of difluorochloromethane, input terminus and the difluorochloromethane rectifying tower of residual receiving tank at night (1) are arranged residual mouth (13) and are connected, the output terminal of residual receiving tank at night (1) is communicated with the entrance end of two steam separators (2) parallel with one another, the import of the raffinate dry slot (3) that the outlet of two steam separators (2) is parallel with one another with two is respectively connected, moisture eliminator is provided with in two raffinate dry slots (3), be connected with the import of two cyclic drying pumps (4) respectively in the outlet of two raffinate dry slots (3), the opening for feed I of all large with the chloroform storage tank (5) of outlet of two cyclic drying pumps (4) is connected, chloroform pump (7) is positioned at the bottom of the large storage tank of chloroform (5), the import of chloroform pump (7) is connected with the outlet of absorption tower (6), the outlet of chloroform pump (7) is connected with the opening for feed of the large storage tank of chloroform (5) bottom.
Description
Technical field
The utility model relates to distillation residual liquid recycle device in the production of a kind of difluorochloromethane.
Background technology
When difluorochloromethane is produced, chloroform and AHF fluoridation will select suitable charge ratio, suitable catalyst concn, suitable operational condition catches transformation efficiency and the selectivity of high difluorochloromethane as far as possible, side reaction is suppressed to be carried out, but in actual production, other height of the HF21 and trace that always have small part boils component, with reaction exhaust enters next step operation.Along with the continuation of producing, the height composition that boils gathers gradually in difluorochloromethane rectifying tower, if discharge of being boiled by height not in time can affect the operation of difluorochloromethane rectifying tower, not only affects quality product and energy consumption also will raise.Nearly all producer is all in line, not only causes environmental pollution, and causes raw material consumption to rise, and production cost improves.Trial was once done by indivedual producer, built and reclaimed difluorochloromethane device, comprised cushion dashpot, compressor, solidifying cooler, storage tank, fresh feed pump, difluorochloromethane rectifying tower, though energy recovery part difluorochloromethane, but investment cost is high, energy consumption is high, is worth without economical operation.After raffinate dewaters by Ye You producer, feeding is separately built a set of small-sized reactive system and is carried out fluoridation, and investment is very large, and troublesome poeration, reactor product foreign matter content is high.
Summary of the invention
The utility model provides distillation residual liquid recycle device in the production of a kind of difluorochloromethane, and not only structure is simple for it, simple operation, and can improve difluorochloromethane raffinate organic efficiency.
The utility model have employed following technical scheme: distillation residual liquid recycle device in a kind of difluorochloromethane production, it comprises raffinate receiving tank, two steam separators, two raffinate dry slots, two cyclic drying pumps, the large storage tank of chloroform, absorption tower and chloroform pump, the input terminus of receiving tank was arranged residual mouth with difluorochloromethane rectifying tower and was connected residual night, residual night, the output terminal of receiving tank was communicated with the entrance end of two steam separators parallel with one another, the import of the raffinate dry slot that the outlet of two steam separators is parallel with one another with two is respectively connected, moisture eliminator is provided with in two raffinate dry slots, be connected with the import of two cyclic drying pumps respectively in the outlet of two raffinate dry slots, the opening for feed I of all large with the chloroform storage tank of two cyclic drying pump outlet is connected, chloroform pump is positioned at the bottom of the large storage tank of chloroform, the import of chloroform pump is connected with the outlet on absorption tower, chloroform pump outlet is connected with the opening for feed of the large sump bottom of chloroform.
Described moisture eliminator is set to mole sieve drier.The large storage tank of described chloroform is provided with pressure unit, and the control end of pressure unit is connected with variable valve.The housing of described raffinate receiving tank is distributed with some water discharge valves I from top to bottom, the housing of raffinate receiving tank is also provided with liquidometer I.The housing of described steam separator is provided with liquidometer II, and steam separator housing is from top to bottom distributed with some water discharge valves II.Described raffinate dry slot is set to cyclic drying groove, is provided with liquidometer II in cyclic drying groove.Described chloroform pump is set to chloroform recycle pump.The top of the large storage tank of described chloroform is provided with condenser.
The utility model has following beneficial effect: after have employed above technical scheme, the input terminus of the utility model receiving tank at residual night is arranged residual mouth with difluorochloromethane rectifying tower and is connected, residual night, receiving tank was communicated with the entrance end of two steam separators parallel with one another, the import of the raffinate dry slot that the outlet of two steam separators is parallel with one another with two is respectively connected, moisture eliminator is provided with in two raffinate dry slots, be connected with the import of two cyclic drying pumps respectively in the outlet of two raffinate dry slots, the opening for feed I of all large with the chloroform storage tank of two cyclic drying pump outlet is connected, chloroform pump is positioned at the bottom of the large storage tank of chloroform, the import of chloroform pump is connected with the outlet on absorption tower, chloroform pump outlet is connected with the opening for feed of the large sump bottom of chloroform, so not only structure is simple, easy to operate, and energy consumption is low, the recovery utilization rate of raffinate can be significantly improved.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
In FIG, the utility model provides distillation residual liquid recycle device in the production of a kind of difluorochloromethane, it comprises raffinate receiving tank 1, two steam separators 2, two raffinate dry slots 3, two cyclic drying pumps 4, the large storage tank 5 of chloroform, absorption tower 6 and chloroform pump 7, the input terminus of receiving tank 1 was arranged residual mouth 13 with difluorochloromethane rectifying tower and was connected residual night, residual night, the output terminal of receiving tank 1 was communicated with the entrance end of two steam separators 2 parallel with one another, the housing of described raffinate receiving tank 3 is distributed with some water discharge valves I 8 from top to bottom, the housing of the raffinate receiving tank 3 of the present embodiment is distributed with four water discharge valves I 8 from top to bottom, the housing of raffinate receiving tank 3 is also provided with liquidometer I 9, the import of the raffinate dry slot 3 that the outlet of two steam separators 2 is parallel with one another with two is respectively connected, the housing of described steam separator 2 is provided with liquidometer II 10, steam separator 2 housing is distributed with some water discharge valves II 11 from top to bottom, steam separator 2 housing of the present embodiment is distributed with four water discharge valves II 11 from top to bottom, moisture eliminator is provided with in two raffinate dry slots 3, raffinate dry slot 3 is set to cyclic drying groove, liquidometer II 12 is provided with in cyclic drying groove, moisture eliminator is set to mole sieve drier, be connected with the import of two cyclic drying pumps 4 respectively in the outlet of two raffinate dry slots 3, the opening for feed I of all large with the chloroform storage tank 5 of outlet of two cyclic drying pumps 4 is connected, chloroform pump 7 is positioned at the bottom of the large storage tank 5 of chloroform, chloroform pump 7 is set to chloroform recycle pump, the import of chloroform pump 7 is connected with the outlet on absorption tower 6, the outlet of chloroform pump 7 is connected with the opening for feed bottom the large storage tank 5 of chloroform, the large storage tank 5 of described chloroform is provided with pressure unit, the control end of pressure unit is connected with variable valve, the top of the large storage tank 5 of chloroform is provided with condenser.Difluorochloromethane rectifying tower is arranged residual mouth 8 and is entered by distillation residual liquid in raffinate receiving tank 1, control the liquid level 2 of distillation residual liquid receiving tank 1 well, naturally cooling, after leaving standstill, then raffinate is drained into steam separator 2, with chuck 0 DEG C of water cooling 5, control the liquid level of steam separator 2 well, chromatography and draining, by the raffinate press-in raffinate dry slot 3 after dehydration, raffinate dry slot 3 reaches certain liquid level, dewatered further by mole sieve drier, start cyclic drying pump 4, raffinate analyzes the large storage tank 5 of qualified rear feeding chloroform, drive chloroform pump 7, difluorochloromethane is absorbed to absorption tower 6, the top of the large storage tank 5 of chloroform is provided with condenser, the large storage tank 5 of chloroform is provided with pressure unit, the control end of pressure unit is connected with variable valve, by the large storage pressure of governor valve control chloroform, form miscellany as production difluorochloromethane raw material, send into fluoridation still to react.
Claims (8)
1. distillation residual liquid recycle device in a difluorochloromethane production, it is characterized in that it comprises raffinate receiving tank (1), two steam separators (2), two raffinate dry slots (3), two cyclic drying pumps (4), the large storage tank of chloroform (5), absorption tower (6) and chloroform pump (7), input terminus and the difluorochloromethane rectifying tower of residual receiving tank at night (1) are arranged residual mouth (13) and are connected, the output terminal of residual receiving tank at night (1) is communicated with the entrance end of two steam separators (2) parallel with one another, the import of the raffinate dry slot (3) that the outlet of two steam separators (2) is parallel with one another with two is respectively connected, moisture eliminator is provided with in two raffinate dry slots (3), be connected with the import of two cyclic drying pumps (4) respectively in the outlet of two raffinate dry slots (3), the opening for feed I of all large with the chloroform storage tank (5) of outlet of two cyclic drying pumps (4) is connected, chloroform pump (7) is positioned at the bottom of the large storage tank of chloroform (5), the import of chloroform pump (7) is connected with the outlet of absorption tower (6), the outlet of chloroform pump (7) is connected with the opening for feed of the large storage tank of chloroform (5) bottom.
2. distillation residual liquid recycle device in difluorochloromethane production according to claim 1, is characterized in that described moisture eliminator is set to mole sieve drier.
3. distillation residual liquid recycle device in difluorochloromethane production according to claim 1, it is characterized in that the large storage tank of described chloroform (5) is provided with pressure unit, the control end of pressure unit is connected with variable valve.
4. distillation residual liquid recycle device in difluorochloromethane production according to claim 1, the housing that it is characterized in that described raffinate receiving tank (3) is distributed with some water discharge valves I (8) from top to bottom, the housing of raffinate receiving tank (3) is also provided with liquidometer I (9).
5. distillation residual liquid recycle device in difluorochloromethane production according to claim 1, it is characterized in that the housing of described steam separator (2) is provided with liquidometer II (10), steam separator (2) housing is from top to bottom distributed with some water discharge valves II (11).
6. distillation residual liquid recycle device in difluorochloromethane production according to claim 1, is characterized in that described raffinate dry slot (3) is set to cyclic drying groove, is provided with liquidometer II (12) in cyclic drying groove.
7. distillation residual liquid recycle device in difluorochloromethane production according to claim 1, is characterized in that described chloroform pump (7) is set to chloroform recycle pump.
8. distillation residual liquid recycle device in difluorochloromethane production according to claim 1, is characterized in that the top of the large storage tank of described chloroform (5) is provided with condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504589.4U CN204198636U (en) | 2014-09-03 | 2014-09-03 | Distillation residual liquid recycle device in a kind of difluorochloromethane production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504589.4U CN204198636U (en) | 2014-09-03 | 2014-09-03 | Distillation residual liquid recycle device in a kind of difluorochloromethane production |
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| CN204198636U true CN204198636U (en) | 2015-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679311A (en) * | 2020-12-26 | 2021-04-20 | 江苏梅兰化工有限公司 | Method for recovering F21 and F22 from F22 rectification residual liquid |
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2014
- 2014-09-03 CN CN201420504589.4U patent/CN204198636U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679311A (en) * | 2020-12-26 | 2021-04-20 | 江苏梅兰化工有限公司 | Method for recovering F21 and F22 from F22 rectification residual liquid |
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