CN102425899B - Using method of low temperature refrigerating machine in low temperature device - Google Patents
Using method of low temperature refrigerating machine in low temperature device Download PDFInfo
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- CN102425899B CN102425899B CN201110342704.3A CN201110342704A CN102425899B CN 102425899 B CN102425899 B CN 102425899B CN 201110342704 A CN201110342704 A CN 201110342704A CN 102425899 B CN102425899 B CN 102425899B
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- precooling
- low temperature
- working medium
- refrigerating machine
- deep freeze
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000001704 evaporation Methods 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 27
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000002360 explosive Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000008246 gaseous mixture Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The invention relates to a using method of a low temperature refrigerating machine in a low temperature device; the using method comprises the following steps: a working medium to be pre-cooled is pre-cooled to reach a specified low temperature; the lower temperature device comprises a plurality of low temperature refrigerating machines and a pre-cooling working medium heat exchanger, wherein the plurality of low temperature refrigerating machines are sequentially arranged from high to low according to the evaporating temperature of the lower temperature refrigerating machines; refrigerating fluid is pumped into each low temperature refrigerating machine; and the refrigerating fluid enters the pre-cooling working medium heat exchanger through the low temperature refrigerating machines to exchange heat with the working medium to be pre-cooled. According to the using method of the low temperature refrigerating machine in the low temperature device, the power consumption can be obviously reduced, and a required mature advanced product of the low temperature refrigerating machine also can be conveniently found. The using method can be applied to the process flow of various low temperature devices using the low temperature refrigerating machines and production devices.
Description
Technical field
The present invention relates to a kind of using method of low temperature refrigerating machine in low temperature device, be applied in the technological process and process units of Cryo Equipment of various use deep freeze refrigerators.
Background technology
In prior art, in Cryo Equipment, deep freeze refrigerator used only has an evaporating temperature, and this evaporating temperature is usually than treating that precooling working medium requires the low 3-5 ℃ of temperature be pre-chilled to.The evaporating temperature difference, the Energy Efficiency Ratio of deep freeze refrigerator is different.For example, during 6 ℃ of evaporating temperatures, Energy Efficiency Ratio (KW refrigerating capacity/KW shaft power) is about 4.5.During evaporating temperature-15 ℃, when Energy Efficiency Ratio is about 2.3 evaporating temperatures-30 ℃, Energy Efficiency Ratio is about 1.6.And, when evaporating temperature is-42 ℃, Energy Efficiency Ratio is only 1.0 left and right.
The evaporating temperature of deep freeze refrigerator is lower, and the value of cold is higher, but it is just more to obtain the electric power that these colds will consume, and is therefore uneconomic.On the other hand, along with the maximization of device, when the evaporating temperature of cold-producing medium is low (as-42 ℃), on market, reliable high-power deep freeze refrigerator kind seldom or do not have, is given the supporting very big difficulty of bringing.
Simultaneously, at some, in inflammable and explosive Cryo Equipment, for example, in the natural gas liquefaction device with precooling, the deep freeze refrigerator of conventional only a kind of evaporating temperature, can only be placed under explosion-proof environment, and this is certain to increase its investment, and is unfavorable for operation.
Summary of the invention
The purpose of this invention is to provide a kind of using method of saving energy and reduce the cost, reducing the low temperature refrigerating machine in low temperature device of investment and easy operating and maintenance.
For achieving the above object, the technical solution used in the present invention is:
A kind of using method of low temperature refrigerating machine in low temperature device, for treating that the precooling of precooling working medium reaches the low temperature of regulation, it comprises many deep freeze refrigerators and treats precooling hot working fluid interchanger, described many deep freeze refrigerators are arranged in order setting from high to low by its evaporating temperature, all pass into cold-producing medium in every described deep freeze refrigerator, described cold-producing medium enters described treat in precooling hot working fluid interchanger and treats the heat exchange of precooling working medium with described after described deep freeze refrigerator.
Preferably, described deep freeze refrigerator is the 2-5 platform, and its evaporating temperature is the 2-5 kind.
Preferably, describedly treat that precooling working medium is pure nitrogen gas, dirty nitrogen, air or the gaseous mixture that is comprised of multiple gases.
Preferably, describedly treat that precooling working medium enters described treating before precooling hot working fluid interchanger as the equal different two bursts of working medium of one working medium or pressure, component.
Preferably, it is applied to use in the technological process and process units of various Cryo Equipments of deep freeze refrigerator.
Preferably, its natural gas liquefaction flow process for the nitrogen swell refrigeration with precooling and device, or for outer circulation liquefaction of nitrogen flow process and device, or in liquid space division flow process and device for the production of liquid oxygen, liquid nitrogen and liquid argon.
Preferably, described until precooling working medium go out described reach precooling after precooling hot working fluid interchanger after temperature, after described precooling, temperature is the arbitrary temp between-10 ℃ to-60 ℃.
Due to the utilization of technique scheme, the present invention compared with prior art has following advantages:
1, because the present invention adopts many evaporating temperatures deep freeze refrigerator from high to low, through the cold-producing medium of each deep freeze refrigerator successively with treat the heat exchange of precooling working medium, make to treat that precooling working medium is cooling step by step, reduced the required cold of low-temperature zone, greatly reduce the electric power that obtains the required consumption of these colds, energy-saving and cost-reducing;
2, because the present invention adopts many deep freeze refrigerators, in inflammable and explosive Cryo Equipment, deep freeze refrigerator can be placed in non-explosion-proof area, reduced investment, simultaneously easy operating and maintenance.
The accompanying drawing explanation
The schematic diagram of the embodiment mono-of the using method that accompanying drawing 1 is low temperature refrigerating machine in low temperature device of the present invention.
In above accompanying drawing: 1, the first deep freeze refrigerator; 2, the second deep freeze refrigerator; 3, the 3rd deep freeze refrigerator; 4, the 4th deep freeze refrigerator; 5, treat precooling hot working fluid interchanger; 6, former precooling heat interchanger;
101, treat precooling working medium; That 102, removes former precooling heat interchanger treats precooling working medium; That 103, removes to treat precooling hot working fluid interchanger treats precooling working medium; What 104, complete precooling treats precooling working medium; 105, cold-producing medium.
The specific embodiment
Below in conjunction with embodiment shown in the drawings, the invention will be further described.
Embodiment mono-: shown in accompanying drawing 1.
A kind of using method of low temperature refrigerating machine in low temperature device, reach the low temperature of regulation for treating 101 precoolings of precooling working medium.It comprises many deep freeze refrigerators and treats precooling hot working fluid interchanger 5, in the present embodiment, adopt four deep freeze refrigerators, be respectively the first deep freeze refrigerator 1, the second deep freeze refrigerator 2, the 3rd deep freeze refrigerator 3, the 4th deep freeze refrigerator 4, these four deep freeze refrigerators are arranged in order setting from high to low by its evaporating temperature, the evaporating temperature of the first deep freeze refrigerator 1 is the highest, and the evaporating temperature of the 4th deep freeze refrigerator 4 is minimum.In the present embodiment, the evaporating temperature of four deep freeze refrigerators is respectively 6 ℃ ,-15 ℃ ,-30 ℃ ,-42 ℃, and this evaporating temperature is the evaporating temperature of cold-producing medium in deep freeze refrigerator.The kind of evaporating temperature optionally property, convenience and guarantee decides.All pass into cold-producing medium 105 in every deep freeze refrigerator.
Treat that precooling working medium 101 is in pure nitrogen gas, dirty nitrogen, air or the gaseous mixture be comprised of multiple gases.Preferably, treat the gaseous mixture of precooling working medium 101 for the pressure two kind gases different with component.
Treat that precooling working medium 101 is divided into two-way, a road 102 goes the former precooling heat interchanger 6 of Cryo Equipment to implement precooling, and a road 103 enters treats precooling hot working fluid interchanger 5.In treating precooling hot working fluid interchanger 5, treat precooling working medium 103 successively and cold-producing medium heat exchange that evaporating temperature is 6 ℃ ,-15 ℃ ,-30 ℃ ,-42 ℃, make until precooling working medium 103 go out meet the requirements of precooling after precooling hot working fluid interchanger 5 after temperature.After the precooling required, temperature is the arbitrary temp between-10 ℃ to-60 ℃, and after this precooling, temperature can decide according to the design of flow process.In the present embodiment, treat that precooling working medium 103 is pre-chilled to-38 ℃ to-39 ℃.What reach set point of temperature continues circulation until precooling working medium 103 and the further part that enters again Cryo Equipment after precooling working medium 104 that a road that goes out former precooling heat interchanger and complete precooling has been merged into as precooling until precooling working medium 102.
Treat that precooling working medium 101 enters and treat that before precooling hot working fluid interchanger 5 be one working medium, or the equal different two bursts of working medium of pressure, component, two bursts of working medium enter and treat precooling hot working fluid interchanger 5 after mixing.In the present embodiment, adopt one to treat precooling working medium 101.
Said method can be applicable to use in the technological process and process units of various Cryo Equipments of deep freeze refrigerator.For example, for the natural gas liquefaction flow process of the nitrogen swell refrigeration with precooling and device, or for outer circulation liquefaction of nitrogen flow process and device, or for the production of the liquid space division flow process of liquid oxygen, liquid nitrogen and liquid argon with in installing.
This method reaches energy-saving and cost-reducing purpose by cooling step by step.Simultaneously, use after cooling step by step and can make the required cold of low-temperature zone greatly reduce, easily find the deep freeze refrigerator of supporting with it reliable in quality and advanced technology on market., each refrigerator can be placed in non-explosion-proof area in inflammable and explosive Cryo Equipment at some, can reduce the investment of Cryo Equipment, and easy operating and maintenance.
Above-described embodiment is only explanation technical conceive of the present invention and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (7)
1. the using method of a low temperature refrigerating machine in low temperature device, for treating that the precooling of precooling working medium reaches the low temperature of regulation, it is characterized in that: it comprises many deep freeze refrigerators and treats precooling hot working fluid interchanger, described many deep freeze refrigerators are arranged in order setting from high to low by its evaporating temperature, all pass into cold-producing medium in every described deep freeze refrigerator, described cold-producing medium enters described treat in precooling hot working fluid interchanger and treats the heat exchange of precooling working medium with described after described deep freeze refrigerator;
Describedly treat that precooling working medium is divided into two-way, a road goes the former precooling heat interchanger of Cryo Equipment to implement precooling, and a road enters the described precooling hot working fluid interchanger for the treatment of; Go out the described road until precooling hot working fluid interchanger described until precooling working medium with go out the described further part that enters again described Cryo Equipment after precooling working medium that has been merged into as precooling until precooling working medium in a road that described former precooling heat interchanger completes precooling and continue circulation.
2. the using method of low temperature refrigerating machine in low temperature device according to claim 1, it is characterized in that: described deep freeze refrigerator is the 2-5 platform, its evaporating temperature is the 2-5 kind.
3. the using method of low temperature refrigerating machine in low temperature device according to claim 1 is characterized in that: describedly treat that precooling working medium is pure nitrogen gas, dirty nitrogen or air.
4. the using method of low temperature refrigerating machine in low temperature device according to claim 3 is characterized in that: describedly treat that precooling working medium enters described treating before precooling hot working fluid interchanger as the equal different two bursts of working medium of one working medium or pressure, component.
5. the using method of low temperature refrigerating machine in low temperature device according to claim 1 is characterized in that: it is applied to use in the technological process and process units of various Cryo Equipments of deep freeze refrigerator.
6. the using method of low temperature refrigerating machine in low temperature device according to claim 5, it is characterized in that: its natural gas liquefaction flow process for the nitrogen swell refrigeration with precooling and device, or for outer circulation liquefaction of nitrogen flow process and device, or in liquid space division flow process and device for the production of liquid oxygen, liquid nitrogen and liquid argon.
7. the using method of low temperature refrigerating machine in low temperature device according to claim 1, it is characterized in that: described until precooling working medium go out described reach precooling after precooling hot working fluid interchanger after temperature, after described precooling, temperature is the arbitrary temp between-10 ℃ to-60 ℃.
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| CN201110342704.3A CN102425899B (en) | 2011-11-03 | 2011-11-03 | Using method of low temperature refrigerating machine in low temperature device |
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| CN201110342704.3A CN102425899B (en) | 2011-11-03 | 2011-11-03 | Using method of low temperature refrigerating machine in low temperature device |
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| CN102425899B true CN102425899B (en) | 2014-01-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105029640A (en) * | 2015-08-11 | 2015-11-11 | 广州玺明机械科技有限公司 | Intelligent cooling device |
| CN115183513B (en) * | 2022-07-21 | 2023-12-15 | 绍兴老鹰冷冻设备有限公司 | Ultralow-temperature tunnel type instant freezer for cold chain fresh-keeping and quick freezing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261430A (en) * | 1997-06-20 | 2000-07-26 | 埃克森生产研究公司 | Improved cascade refrigeration process for liquefaction of natural gas |
| CN1265462A (en) * | 1998-12-30 | 2000-09-06 | 普拉塞尔技术有限公司 | Variable load refrigeration system particularly for cryogenic temperatures |
| JP2010189622A (en) * | 2008-12-12 | 2010-09-02 | Air Products & Chemicals Inc | Natural gas liquefaction system and natural gas liquefaction method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710074A (en) * | 1980-06-18 | 1982-01-19 | Akira Senda | Protective apparatus of mechanical refrigerating plant for mechanical gas combined refrigerating plant |
| FR2938903B1 (en) * | 2008-11-25 | 2013-02-08 | Technip France | PROCESS FOR PRODUCING A LIQUEFIED NATURAL GAS CURRENT SUB-COOLED FROM A NATURAL GAS CHARGE CURRENT AND ASSOCIATED INSTALLATION |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261430A (en) * | 1997-06-20 | 2000-07-26 | 埃克森生产研究公司 | Improved cascade refrigeration process for liquefaction of natural gas |
| CN1265462A (en) * | 1998-12-30 | 2000-09-06 | 普拉塞尔技术有限公司 | Variable load refrigeration system particularly for cryogenic temperatures |
| JP2010189622A (en) * | 2008-12-12 | 2010-09-02 | Air Products & Chemicals Inc | Natural gas liquefaction system and natural gas liquefaction method |
| CN101845340A (en) * | 2008-12-12 | 2010-09-29 | 气体产品与化学公司 | Alternative pre-cooled configuration |
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