CN112392557B - Turbine expansion system for low-temperature gas liquefaction - Google Patents
Turbine expansion system for low-temperature gas liquefaction Download PDFInfo
- Publication number
- CN112392557B CN112392557B CN201910743223.XA CN201910743223A CN112392557B CN 112392557 B CN112392557 B CN 112392557B CN 201910743223 A CN201910743223 A CN 201910743223A CN 112392557 B CN112392557 B CN 112392557B
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- units
- turbine expansion
- oil supply
- pipeline
- temperature gas
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 39
- 238000000034 method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D13/00—Combinations of two or more machines or engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/20—Lubricating arrangements using lubrication pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses a turbine expansion system for low-temperature gas liquefaction, which comprises: the system comprises a cold box, turbine expansion units and oil supply stations, wherein each turbine expansion unit is connected with the cold box through a pipeline, each oil supply station is connected with a corresponding turbine expansion unit through an oil supply pipe and an oil return pipe, every two adjacent turbine expansion units are combined into a unit, when the number of the turbine expansion units combined into the rest is three, the rest three units are combined into a unit, two oil supply pipes corresponding to the two units of the turbine expansion units are communicated through a pipeline with a valve, and two oil return pipes corresponding to the unit are communicated through a pipeline with a bidirectional pump; the three oil supply pipes corresponding to the units with the number of the turbine expansion units are communicated with each other through the pipeline with the valve, and the three oil return pipes corresponding to the units are communicated with each other through the pipeline with the two-way pump, and the system further comprises: and the central controller. The system can ensure that each turbine expansion unit reliably and stably operates.
Description
Technical Field
The invention relates to the field of low-temperature gas liquefaction equipment, in particular to a turbine expansion system for low-temperature gas liquefaction.
Background
The low temperature gas such as hydrogen, helium and the like is more favorable for transportation and storage after liquefaction, the cold required by the low temperature gas liquefaction is usually provided by a turbine expansion system, the gas is subjected to adiabatic expansion and externally acting to be an important method for obtaining the low temperature, and the turbine expansion system is used for cooling the working medium gas by performing adiabatic expansion on the compressed working medium gas under high pressure and externally acting to perform heat exchange between the cooled working medium gas and the low temperature gas, so as to provide the cold for the low temperature gas. The structure of the existing turboexpansion system comprises: the system comprises a cold box, a plurality of turbine expansion units capable of providing cold energy for low-temperature gas liquefaction, a plurality of oil supply stations which are in one-to-one correspondence with the turbine expansion units and can supply oil for the turbine expansion units in a circulating way, wherein each turbine expansion unit is connected with the cold box through an air inlet pipe and an air return pipe, so that working medium gas which is expanded and doing work and cooled in the turbine expansion units can enter the cold box to exchange heat with the low-temperature gas, then the working medium gas returns to the turbine expansion units to be cooled, and each oil supply station is connected with the corresponding turbine expansion unit through an oil supply pipe and an oil return pipe, so that the oil supply stations can supply oil for the turbine expansion units. Before low-temperature gas liquefaction, heat exchange is carried out with working medium gas in each turbine expansion unit in sequence to cool the working medium gas step by step.
The existing turboexpansion units in the turboexpansion system are supplied with oil by only one oil supply station, when one oil supply station suddenly breaks down and cannot supply oil, the turboexpansion unit corresponding to the oil supply station cannot work normally due to oil-free lubrication and cooling, and therefore the whole turboexpansion system cannot provide enough cold energy for low-temperature gas, and the low-temperature gas cannot be liquefied. The equipment costs of the system would be greatly increased if each turbo-expander train were equipped with a backup oil supply.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the turbine expansion system for low-temperature gas liquefaction can ensure that each turbine expansion unit reliably and stably operates.
In order to solve the problems, the invention adopts the following technical scheme: a turboexpansion system for low temperature gas liquefaction comprising: the system comprises a cold box, a plurality of turbine expansion units capable of providing cold energy for low-temperature gas liquefaction, a plurality of oil supply stations which are in one-to-one correspondence with the turbine expansion units and can supply oil for the turbine expansion units in a circulating way, wherein each turbine expansion unit is connected with the cold box through a pipeline, so that working medium gas which is expanded and doing work and cooled in the turbine expansion units can enter the cold box to perform heat exchange with the low-temperature gas, then the working medium gas returns to the turbine expansion units to be cooled, and each oil supply station is connected with the corresponding turbine expansion unit through an oil supply pipe and an oil return pipe, and the system is characterized in that: when the number of the units combined to the rest is three, the rest three turbo-expansion units are combined into a unit, two oil supply pipes corresponding to the two units of the turbo-expansion units are communicated through a pipeline with a valve, and two oil return pipes corresponding to the unit are communicated through a pipeline with a bidirectional pump; the three oil supply pipes corresponding to the units with the number of the turbine expansion units are communicated with each other through the pipeline with the valve, and the three oil return pipes corresponding to the units are communicated with each other through the pipeline with the two-way pump, and the system further comprises: and a central controller capable of controlling each valve and each bi-directional pump.
Further, the above-mentioned turboexpansion system for low-temperature gas liquefaction, wherein: two oil supply pipes in the three oil supply pipes corresponding to the units with the number of the turbine expansion units are respectively communicated with the rest oil supply pipes through a pipeline with a valve, and three oil return pipes corresponding to the units are communicated through two pipelines with two-way pumps according to the connection relation between the corresponding oil supply pipes.
Further, the above-mentioned turboexpansion system for low-temperature gas liquefaction, wherein: the three oil supply pipes corresponding to the units with the number of the turbine expansion units are respectively communicated through a pipeline with a valve, and the three oil return pipes corresponding to the units are respectively communicated through a pipeline with a bidirectional pump.
Further, the above-mentioned turboexpansion system for low-temperature gas liquefaction, wherein: the units with three turbo-expansion units are positioned behind other units, so that low-temperature gas finally enters the units for heat exchange and cooling before liquefaction.
Further, the above-mentioned turboexpansion system for low-temperature gas liquefaction, wherein: each oil supply station is skid-mounted on an independent skid block; each turbine expander unit is skid-mounted on a separate skid.
The invention has the advantages that: after the turbine expansion system for low-temperature gas liquefaction combines the turbine expansion units into the units, the turbine expansion units can supply oil through the oil supply stations corresponding to other turbine expansion machines of the unit when the oil supply station corresponding to the turbine expansion units fails, so that the uninterrupted, reliable and stable operation of the turbine expansion units can be ensured.
Drawings
FIG. 1 shows a turbine expansion system for low temperature gas liquefaction according to the present invention.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1, a turbine expansion system for low-temperature gas liquefaction includes: the system comprises a cold box 1, seven turbine expansion units 2 which can provide cold energy for low-temperature gas liquefaction, seven oil supply stations 3 which are in one-to-one correspondence with the turbine expansion units 2 and can supply oil for the turbine expansion units 2 in a circulating way, wherein each turbine expansion unit 2 is connected with the cold box 1 through an air inlet pipe and an air return pipe, so that working medium gas which expands and works and cools in the turbine expansion units 2 can enter the cold box 1 to exchange heat with low-temperature gas, then the working medium gas returns to the turbine expansion units 2 to cool, and the cold box 1 can be a large heat exchange box body or is formed by connecting a plurality of small heat exchange boxes through pipelines; each oil supply station 3 is connected with the corresponding turboexpander units 2 through an oil supply pipe 7 and an oil return pipe 8, every two adjacent turboexpander units 2 are combined into one unit, when the number of the turboexpander units 2 combined into the rest is three, the rest three turboexpander units 2 are combined into one unit, in the embodiment, two units are arranged in the number of the turboexpander units 2, and one unit is arranged in the number of the turboexpander units 2; if the number of turboexpander units 2 is even, then there will be no units with three turboexpander units 2; two oil supply pipes 7 corresponding to two units of the turbine expansion unit 2 are communicated through a pipeline with a valve 4, and two oil return pipes 8 corresponding to the units are communicated through a pipeline with a bidirectional pump 5; the three oil supply pipes 7 corresponding to the units of the turbo-expander set 2 are mutually communicated through the pipeline with the valve 4, and the three oil return pipes 8 corresponding to the units are mutually communicated through the pipeline with the bidirectional pump 5, and the system further comprises: a central controller 6 capable of controlling each valve 4 and each bi-directional pump 5.
In this embodiment, the left and right two oil supply pipes 7 of the three oil supply pipes 7 corresponding to the three units of the turboexpander 2 are respectively communicated with the middle oil supply pipe 7 through a pipeline with a valve 4, and the three oil return pipes 8 corresponding to the units are respectively communicated with the middle oil return pipe 8 through two pipelines with a bidirectional pump 5 according to the connection relationship between the corresponding oil supply pipes 7, that is, the left and right two oil return pipes 8 are respectively communicated with the middle oil return pipe 8 through a pipeline with a bidirectional pump 5. In addition, in order to realize better mutual oil supply, the left and right oil supply pipes 7 are also communicated through a pipeline with a valve 4, and the left and right oil return pipes 8 are also communicated through a pipeline with a bidirectional pump 5.
In this embodiment, the unit of the turbo-expander set 2, the number of which is three, is located behind the other units, so that the low-temperature gas finally enters the unit for heat exchange and cooling before liquefaction. This is because the lower the temperature, the closer to the liquefaction temperature zone, the more important is the stable operation of the refrigeration process, and the unit with three turboexpander units 2 has higher stability and can better meet the requirement of uninterrupted operation because the three oil supply stations 3 can supply oil to each other.
Each oil supply station 3 is skid-mounted on a single skid; each turboexpander unit 2 is skid-mounted on a separate skid. After the corresponding devices are skid-mounted together, the devices can be integrated in a production workshop, so that the lifting transportation, the field installation and the replacement are facilitated.
When a certain oil supply station 3 suddenly breaks down and cannot supply oil, the central controller 6 opens a valve 4 and a two-way pump 5 on a unit pipeline where the oil supply station 3 is positioned, so that other oil supply stations 3 in the unit can supply oil to the turbine expansion unit 2 corresponding to the oil supply station 3 with the fault, and the two-way pump 5 is adopted to change the oil return direction aiming at the change of the oil supply direction on one hand, and on the other hand, because the oil supply station 3 with the corresponding oil supply and the turbine expansion unit 2 are arranged relatively close, the oil return between the two is relatively smooth, and a pump is not required to be arranged on an oil return pipe 8; the oil supply station 3 and the turbo-expander set 2 which do not supply oil correspondingly are arranged far, so that a pump is needed to assist oil return on a pipeline for the oil return to be smooth.
Claims (5)
1. A turboexpansion system for low temperature gas liquefaction comprising: the system comprises a cold box, a plurality of turbine expansion units capable of providing cold energy for low-temperature gas liquefaction, a plurality of oil supply stations which are in one-to-one correspondence with the turbine expansion units and can supply oil for the turbine expansion units in a circulating way, wherein each turbine expansion unit is connected with the cold box through a pipeline, so that working medium gas which is expanded and doing work and cooled in the turbine expansion units can enter the cold box to perform heat exchange with the low-temperature gas, then the working medium gas returns to the turbine expansion units to be cooled, and each oil supply station is connected with the corresponding turbine expansion unit through an oil supply pipe and an oil return pipe, and the system is characterized in that: each two adjacent turboexpander units are combined into a unit, the number of the units combined into the rest of the turboexpander units is three, the rest of the three turboexpander units are combined into a unit, two oil supply pipes corresponding to the two units of the turboexpander units are communicated through a pipeline with a valve, and two oil return pipes corresponding to the units are communicated through a pipeline with a bidirectional pump; the three oil supply pipes corresponding to the units with the number of the turbine expansion units are communicated with each other through the pipeline with the valve, and the three oil return pipes corresponding to the units are communicated with each other through the pipeline with the two-way pump, and the system further comprises: and a central controller capable of controlling each valve and each bi-directional pump.
2. A turboexpansion system for low temperature gas liquefaction as defined in claim 1, wherein: two oil supply pipes in the three oil supply pipes corresponding to the units with the number of the turbine expansion units are respectively communicated with the rest oil supply pipes through a pipeline with a valve, and three oil return pipes corresponding to the units are communicated through two pipelines with two-way pumps according to the connection relation between the corresponding oil supply pipes.
3. A turboexpansion system for low temperature gas liquefaction as defined in claim 1, wherein: the three oil supply pipes corresponding to the units with the number of the turbine expansion units are respectively communicated through a pipeline with a valve, and the three oil return pipes corresponding to the units are respectively communicated through a pipeline with a bidirectional pump.
4. A turboexpansion system for low temperature gas liquefaction as defined in claim 1, 2 or 3, wherein: the units with three turbo-expansion units are positioned behind other units, so that low-temperature gas finally enters the units for heat exchange and cooling before liquefaction.
5. A turboexpansion system for low temperature gas liquefaction as defined in claim 1,2 or 3, wherein: each oil supply station is skid-mounted on an independent skid block; each turbine expander unit is skid-mounted on a separate skid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743223.XA CN112392557B (en) | 2019-08-13 | 2019-08-13 | Turbine expansion system for low-temperature gas liquefaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743223.XA CN112392557B (en) | 2019-08-13 | 2019-08-13 | Turbine expansion system for low-temperature gas liquefaction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112392557A CN112392557A (en) | 2021-02-23 |
| CN112392557B true CN112392557B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910743223.XA Active CN112392557B (en) | 2019-08-13 | 2019-08-13 | Turbine expansion system for low-temperature gas liquefaction |
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| CN (1) | CN112392557B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392555B (en) * | 2019-08-13 | 2024-05-07 | 江苏国富氢能技术装备股份有限公司 | Group formula low temperature gas liquefaction is with turboexpansion system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5217199A (en) * | 1991-01-25 | 1993-06-08 | Asea Brown Boveri Ltd. | Connecting valve and hydraulic oil safety and power system in which the connecting valve is used |
| CN202832668U (en) * | 2012-08-22 | 2013-03-27 | 杭州杭氧膨胀机有限公司 | Whole prying-installing type high-low-temperature turbine expansion unit |
| CN106287625A (en) * | 2016-10-07 | 2017-01-04 | 侴乔力 | Condensing source heat pump with economizer drives steam boiler |
| CN108019283A (en) * | 2017-11-08 | 2018-05-11 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of double hair helicopter oil supply system frameworks |
| CN108547669A (en) * | 2018-05-28 | 2018-09-18 | 张家港富瑞氢能装备有限公司 | A kind of liquefaction of hydrogen hydrogen Turbine expansion unit |
| CN210483814U (en) * | 2019-08-13 | 2020-05-08 | 江苏国富氢能技术装备有限公司 | Turbine expansion system for low-temperature gas liquefaction |
-
2019
- 2019-08-13 CN CN201910743223.XA patent/CN112392557B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5217199A (en) * | 1991-01-25 | 1993-06-08 | Asea Brown Boveri Ltd. | Connecting valve and hydraulic oil safety and power system in which the connecting valve is used |
| CN202832668U (en) * | 2012-08-22 | 2013-03-27 | 杭州杭氧膨胀机有限公司 | Whole prying-installing type high-low-temperature turbine expansion unit |
| CN106287625A (en) * | 2016-10-07 | 2017-01-04 | 侴乔力 | Condensing source heat pump with economizer drives steam boiler |
| CN108019283A (en) * | 2017-11-08 | 2018-05-11 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of double hair helicopter oil supply system frameworks |
| CN108547669A (en) * | 2018-05-28 | 2018-09-18 | 张家港富瑞氢能装备有限公司 | A kind of liquefaction of hydrogen hydrogen Turbine expansion unit |
| CN210483814U (en) * | 2019-08-13 | 2020-05-08 | 江苏国富氢能技术装备有限公司 | Turbine expansion system for low-temperature gas liquefaction |
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| CN112392557A (en) | 2021-02-23 |
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Country or region after: China Address after: 215600 No. 236, Guotai North Road, Zhangjiagang City, Suzhou City, Jiangsu Province Applicant after: Jiangsu Guofu hydrogen energy technology equipment Co.,Ltd. Address before: Jiangsu Guofu hydrogen technology equipment Co., Ltd., No.19, Fuxin (Chenxin) road, yangshe Town, Zhangjiagang City, Suzhou City, Jiangsu Province, 215600 Applicant before: Jiangsu Guofu Hydrogen Energy Technology Equipment Co.,Ltd. Country or region before: China |
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