CN101275798A - Rectification type mixed working substance self-stacking gas liquefaction system - Google Patents
Rectification type mixed working substance self-stacking gas liquefaction system Download PDFInfo
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- CN101275798A CN101275798A CNA2007101648488A CN200710164848A CN101275798A CN 101275798 A CN101275798 A CN 101275798A CN A2007101648488 A CNA2007101648488 A CN A2007101648488A CN 200710164848 A CN200710164848 A CN 200710164848A CN 101275798 A CN101275798 A CN 101275798A
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- 239000000126 substance Substances 0.000 title claims description 9
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 230000008676 import Effects 0.000 claims description 18
- 239000010687 lubricating oil Substances 0.000 abstract description 4
- 239000003507 refrigerant Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 23
- 239000012530 fluid Substances 0.000 description 13
- 238000009835 boiling Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
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Abstract
The invention discloses a rectified mixed working medium auto-overlapping gas liquefying system, having orderly a compressor, a condenser, a device for drying and filtering, a rectifying device, a first heat interchanger, a second heat interchanger, a first throttle valve, a third heat interchanger and a gas-liquid separator connected. The invention replaces 2-5 level separating process of the conventional mixed working medium gas liquefying system by the rectifying device, cools the raw material gas section by section by three heat interchangers with different temperature, which simplifies the structure of the liquefying system, and removes the lubricating oil entering to the refrigerant in a low pressure portion to guarantee high efficiency and reliable operation of the refrigerator. The system is appropriate for occasions where small and micro-gas liquefying devices are required.
Description
Technical field
The present invention relates to a kind of gas liquefaction system, relate in particular to a kind of rectification type mixed working substance self-stacking gas liquefaction system.
Background technology
The mixed working fluid gas liquefaction system is widely used in the liquefaction industry of natural gas, these traditional mixed working fluid gas liquefaction systems are owing to adopted 2～5 grades separation process, the ubiquity unit is many, and initial cost is big, the shortcoming that systemic circulation is too complicated, restive.Concerning small-sized and minitype gas liquefying plant, equipment simply is very important decisive factor, and above-mentioned traditional liquefaction system can not adapt to the miniaturization and the microminiaturization of gas liquefaction system, needs the novel gas liquefaction system of development to satisfy actual needs.
The mixed working fluid deep refrigerating device of the employing rectifier unit that patent ZL02110664.9 proposes when constituent element separates, can be removed the lubricating oil that enters into the cold-producing medium of low-pressure section effectively, guarantees the efficient and reliability service of refrigeration machine.The present invention has further simplified the refrigeration system of patent ZL02110664.9, and will need the unstrpped gas that liquefies to insert in three heat exchangers of refrigeration system, utilizes three different temperatures heat exchangers of refrigeration system to cool off unstrpped gas piecemeal.Compare with conventional hybrid Working medium gas liquefaction system, the mixed working fluid gas liquefaction system that the present invention proposes is reduced to distillation process one time with 2～5 grades of separation processes of conventional hybrid Working medium gas liquefaction system, have simple in structure, dependable performance, system's liquefied fraction is than advantages such as height.The present invention just is based on this background proposition.
Summary of the invention
The purpose of this invention is to provide a kind of rectification type mixed working substance self-stacking gas liquefaction system.
It has compressor, condenser, device for drying and filtering, rectifier unit, first heat exchanger, second heat exchanger, first throttle valve, the 3rd heat exchanger, the gas-liquid separator that connects successively; The outlet of compressor links to each other with the import of condenser, the outlet of condenser links to each other with the import of device for drying and filtering, the outlet of device for drying and filtering links to each other with first port of rectifier unit, second port of rectifier unit links to each other with second port of first heat exchanger, the five-port of first heat exchanger links to each other with second port of second heat exchanger, the five-port of second heat exchanger links to each other with the import of first throttle valve, the outlet of first throttle valve links to each other with second port of the 3rd heat exchanger, the 4th port of the 3rd heat exchanger links to each other with the 6th port 23 of second heat exchanger, the 3rd port of second heat exchanger links to each other with the 6th port of first heat exchanger, the 3rd port of first heat exchanger links to each other with the import of rectifier unit heat exchange of top part device, and the outlet of rectifier unit heat exchange of top part device links to each other with the import of compressor; The 3rd port of rectifier unit links to each other with the import of second choke valve, and the outlet connection of second choke valve links to each other with the tube connector of the 6th port of the 3rd port of second heat exchanger and first heat exchanger; The 4th port of first heat exchanger links to each other with first port of second heat exchanger, and the 4th port of second heat exchanger links to each other with first port of the 3rd heat exchanger, and the 3rd port of the 3rd heat exchanger links to each other with first port of gas-liquid separator.
The present invention utilizes rectifier unit to replace 2～5 grades of separation processes of conventional hybrid Working medium gas liquefaction system, utilize three different temperatures heat exchangers to cool off unstrpped gas piecemeal, make the structure of liquefaction system greatly simplify, the lubricating oil that enters into the cold-producing medium of low-pressure section can be removed effectively simultaneously, be guaranteed the efficient and reliability service of refrigeration machine.Native system need to be specially adapted to the occasion of small-sized and minitype gas liquefying plant.
Description of drawings
Accompanying drawing is the rectification type mixed working substance self-stacking gas liquefaction system flow chart.
The specific embodiment
As shown in drawings, the present invention has compressor 1, condenser 2, device for drying and filtering 3, rectifier unit 4, first heat exchanger 6, second heat exchanger 7, first throttle valve 9, the 3rd heat exchanger 8, the gas-liquid separator 10 that connects successively; The outlet of compressor 1 links to each other with the import of condenser 2, the outlet of condenser 2 links to each other with the import of device for drying and filtering 3, the outlet of device for drying and filtering 3 links to each other with first port 34 of rectifier unit 4, second port 35 of rectifier unit 4 links to each other with second port one 5 of first heat exchanger 6, the five-port 18 of first heat exchanger 6 links to each other with second port 21 of second heat exchanger 7, the five-port 24 of second heat exchanger 7 links to each other with the import of first throttle valve 9, the outlet of first throttle valve 9 links to each other with second port 26 of the 3rd heat exchanger 8, the 4th port 28 of the 3rd heat exchanger 8 links to each other with the 6th port 23 of second heat exchanger 7, the 3rd port 20 of second heat exchanger 7 links to each other with the 6th port one 9 of first heat exchanger 6, the 3rd port one 6 of first heat exchanger 6 links to each other with the import 12 of rectifier unit 4 heat exchange of top part devices 5, and the outlet 13 of rectifier unit heat exchange of top part device 5 links to each other with the import of compressor 1; The 3rd port 36 of rectifier unit 4 links to each other with the import of second choke valve 11, and the outlet of second choke valve 11 connects 33 and links to each other with the 3rd port 20 of second heat exchanger 7 and the tube connector of the 6th port one 9 of first heat exchanger 6; The 4th port one 7 of first heat exchanger 6 links to each other with first port 22 of second heat exchanger 7, the 4th port 25 of second heat exchanger 7 links to each other with first port 27 of the 3rd heat exchanger 8, and the 3rd port 29 of the 3rd heat exchanger 8 links to each other with first port 30 of gas-liquid separator 10.
Described condenser 2 is air-cooled condenser or water-cooled condenser.Rectifier unit 4 is packed tower or rectifying column.The first throttle valve 9 and second choke valve 11 are capillary, automatic valve or manually-operated gate.
The present invention can be divided into refrigerant loop and liquefied gas loop.In the refrigerant loop, after compressed machine 1 pressurization of mixed working fluid, be cooled to the high-pressure fluid of gas-liquid two-phase by condenser 2, and flow in the still of rectifier unit 4 behind the drying device filter 3, mixed working fluid is divided into two parts and flows out.
Gaseous state mixed working fluid in the still passes through the rectifying section of rectifier unit 4 from bottom to top, the phegma dirty with rectifier unit 4 tops carries out heat, matter exchange, high boiling component and lubricating oil and a small amount of low boiling component are condensed a part that becomes phegma, most of low boiling component is that main gaseous state mixed working fluid passes through rectifier unit 4 heat exchange of top part devices 5, from second port, 35 outflows of rectifier unit 4.Thereafter once by first heat exchanger 6 and second heat exchanger 7, flow through second choke valve, 9 throttlings cooling after being cooled, enter the 3rd heat exchanger 8 cooling unstripped gas, backflow successively then by second heat exchanger 7, first heat exchanger 6 and 5 re-heats of rectifier unit 4 heat exchange of top part devices, return compressor 1 air entry.High boiling component is main liquid mixed working fluid at the bottom of the still of rectifier unit 4, and the 3rd port 36 flows out, by second choke valve, 11 throttlings cooling back and the low boiling component that flows out from second heat exchanger 7 the 3rd port 20 is that main mixed working fluid mixes, enter first heat exchanger 6, to the unstripped gas and the gaseous state mixed working fluid cooling of flowing out from rectifier unit 4 tops, and after 5 re-heats of rectifier unit 4 heat exchange of top part devices, return compressor 1 air entry.
In the natural gas loop, unstripped gas after purified treatment enters liquefaction system from first port one 4 of first heat exchanger 6, successively by the liquefaction that is cooled of first heat exchanger 6, second heat exchanger 7 and the 3rd heat exchanger 8, flow in the gas-liquid separator 10 always, liquiefied product is sent to the preservation of LNG fluid reservoir from the 3rd port 32 of gas-liquid separator 10, a spot of second port 31 dischargings of unstripped gas from gas-liquid separator 10 that are not liquefied.
Claims (4)
1. a rectification type mixed working substance self-stacking gas liquefaction system is characterized in that it has compressor (1), condenser (2), device for drying and filtering (3), rectifier unit (4), first heat exchanger (6), second heat exchanger (7), first throttle valve (9), the 3rd heat exchanger (8), the gas-liquid separator (10) that connects successively; The outlet of described compressor (1) links to each other with the import of condenser (2), the outlet of condenser (2) links to each other with the import of device for drying and filtering (3), the outlet of device for drying and filtering (3) links to each other with first port (34) of rectifier unit (4), second port (35) of rectifier unit (4) links to each other with second port (15) of first heat exchanger (6), the five-port (18) of first heat exchanger (6) links to each other with second port (21) of second heat exchanger (7), the five-port (24) of second heat exchanger (7) links to each other with the import of first throttle valve (9), the outlet of first throttle valve (9) links to each other with second port (26) of the 3rd heat exchanger (8), the 4th port (28) of the 3rd heat exchanger (8) links to each other with the 6th port (23) of second heat exchanger (7), the 3rd port (20) of second heat exchanger (7) links to each other with the 6th port (19) of first heat exchanger (6), the 3rd port (16) of first heat exchanger (6) links to each other with the import (12) of rectifier unit (4) heat exchange of top part device (5), and the outlet (13) of rectifier unit heat exchange of top part device (5) links to each other with the import of compressor (1); The 3rd port (36) of rectifier unit (4) links to each other with the import of second choke valve (11), and the outlet connection (33) of second choke valve (11) links to each other with the tube connector of the 6th port (19) of the 3rd port (20) of second heat exchanger (7) and first heat exchanger (6); The 4th port (17) of first heat exchanger (6) links to each other with first port (22) of second heat exchanger (7), the 4th port (25) of second heat exchanger (7) links to each other with first port (27) of the 3rd heat exchanger (8), and the 3rd port (29) of the 3rd heat exchanger (8) links to each other with first port (30) of gas-liquid separator (10).
2. a kind of rectification type mixed working substance self-stacking gas liquefaction system according to claim 1 is characterized in that described condenser (2) is air-cooled condenser or water-cooled condenser.
3. a kind of rectification type mixed working substance self-stacking gas liquefaction system according to claim 1 is characterized in that described rectifier unit (4) is packed tower or rectifying column.
4. a kind of rectification type mixed working substance self-stacking gas liquefaction system according to claim 1 is characterized in that described first throttle valve (9) and second choke valve (11) are capillary, automatic valve or manually-operated gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101648488A CN101275798A (en) | 2007-12-27 | 2007-12-27 | Rectification type mixed working substance self-stacking gas liquefaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101648488A CN101275798A (en) | 2007-12-27 | 2007-12-27 | Rectification type mixed working substance self-stacking gas liquefaction system |
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| CN101275798A true CN101275798A (en) | 2008-10-01 |
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| CNA2007101648488A Pending CN101275798A (en) | 2007-12-27 | 2007-12-27 | Rectification type mixed working substance self-stacking gas liquefaction system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893344A (en) * | 2010-06-24 | 2010-11-24 | 中国科学院理化技术研究所 | Low-temperature liquefaction system with mixed working medium double circulation |
| CN102147162A (en) * | 2011-03-16 | 2011-08-10 | 浙江大学 | Rectifying type variation-concentration self-overlaying gas liquefaction system |
| CN102269491A (en) * | 2010-06-07 | 2011-12-07 | 四川空分设备(集团)有限责任公司 | Noncondensable gas separation and refrigerant recycling device and method for refrigerating system |
| CN104197593A (en) * | 2014-08-21 | 2014-12-10 | 浙江大学 | Horizontal rectification oil separator |
| CN106823440A (en) * | 2017-01-25 | 2017-06-13 | 浙江大学 | A kind of oil and gas separating system of rectification type Auto-cascade cycle cryogenic condensation |
| CN106924988A (en) * | 2017-01-25 | 2017-07-07 | 浙江大学 | A kind of rectification type Auto-cascade cycle low-temperature condensing vapour piece-rate system with cold recovery |
| CN107560233A (en) * | 2017-09-04 | 2018-01-09 | 江苏泰利达新材料股份有限公司 | A kind of alcohol heat pump distillation residual heat reutilizing system device |
| CN110553429A (en) * | 2019-08-27 | 2019-12-10 | 中国科学院理化技术研究所 | cold-carrying circulating system |
| CN111043784A (en) * | 2019-12-30 | 2020-04-21 | 浙江大学 | Control system for cooling rectification type self-cascade refrigeration system |
| CN115468327A (en) * | 2022-09-20 | 2022-12-13 | 河南科技大学 | Self-overlapping refrigerating system with grading dephlegmator |
-
2007
- 2007-12-27 CN CNA2007101648488A patent/CN101275798A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269491A (en) * | 2010-06-07 | 2011-12-07 | 四川空分设备(集团)有限责任公司 | Noncondensable gas separation and refrigerant recycling device and method for refrigerating system |
| CN101893344A (en) * | 2010-06-24 | 2010-11-24 | 中国科学院理化技术研究所 | Low-temperature liquefaction system with mixed working medium double circulation |
| CN101893344B (en) * | 2010-06-24 | 2012-08-15 | 中国科学院理化技术研究所 | Low-temperature liquefaction system with mixed working medium double circulation |
| CN102147162A (en) * | 2011-03-16 | 2011-08-10 | 浙江大学 | Rectifying type variation-concentration self-overlaying gas liquefaction system |
| CN102147162B (en) * | 2011-03-16 | 2012-06-27 | 浙江大学 | Rectifying type variation-concentration self-overlaying gas liquefaction system |
| CN104197593A (en) * | 2014-08-21 | 2014-12-10 | 浙江大学 | Horizontal rectification oil separator |
| CN104197593B (en) * | 2014-08-21 | 2016-05-11 | 浙江大学 | A kind of horizontal rectification type oil eliminator |
| CN106924988A (en) * | 2017-01-25 | 2017-07-07 | 浙江大学 | A kind of rectification type Auto-cascade cycle low-temperature condensing vapour piece-rate system with cold recovery |
| CN106823440A (en) * | 2017-01-25 | 2017-06-13 | 浙江大学 | A kind of oil and gas separating system of rectification type Auto-cascade cycle cryogenic condensation |
| CN106823440B (en) * | 2017-01-25 | 2019-01-11 | 浙江大学 | A kind of oil and gas separating system of rectification type Auto-cascade cycle cryogenic condensation |
| CN107560233A (en) * | 2017-09-04 | 2018-01-09 | 江苏泰利达新材料股份有限公司 | A kind of alcohol heat pump distillation residual heat reutilizing system device |
| CN110553429A (en) * | 2019-08-27 | 2019-12-10 | 中国科学院理化技术研究所 | cold-carrying circulating system |
| CN110553429B (en) * | 2019-08-27 | 2021-09-17 | 中国科学院理化技术研究所 | Cold-carrying circulating system |
| CN111043784A (en) * | 2019-12-30 | 2020-04-21 | 浙江大学 | Control system for cooling rectification type self-cascade refrigeration system |
| CN115468327A (en) * | 2022-09-20 | 2022-12-13 | 河南科技大学 | Self-overlapping refrigerating system with grading dephlegmator |
| CN115468327B (en) * | 2022-09-20 | 2023-09-15 | 河南科技大学 | Self-cascade refrigeration system with grading and dephlegmator |
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Open date: 20081001 |