CN104110574A - Cryogenic gas condensing and recycling system and method - Google Patents
Cryogenic gas condensing and recycling system and method Download PDFInfo
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- CN104110574A CN104110574A CN201410365073.0A CN201410365073A CN104110574A CN 104110574 A CN104110574 A CN 104110574A CN 201410365073 A CN201410365073 A CN 201410365073A CN 104110574 A CN104110574 A CN 104110574A
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Abstract
The invention discloses a cryogenic gas condensing and recycling system and method. The cryogenic gas condensing and recycling system comprises a storage tank, a pump, a switching valve, a first valve, a cryogenic refrigerating machine, a liquid storage tank and a second valve, wherein the storage tank, the pump and a first inlet of the switching valve are connected with one another in sequence; an outlet of the switching valve, the first valve, the cryogenic refrigerating machine and the liquid storage tank are connected with one another in sequence; the storage tank is connected with a second inlet of the switching valve; the outlet of the switching valve is connected with the second valve. The system and the method are applicable to condensing and recycling of natural gas which is required to be emitted during an annual inspection or overhaul and maintenance process of a vehicle-mounted LNG (Liquefied Natural Gas) bottle, an LNG tank wagon, a storage tank and the like, and can also be used for recycling gas when storage tanks of corresponding cryogenic gases, such as nitrogen, oxygen and argon, are inspected, and thus the problems about safety, environmental pollution, resource waste and the like caused by directly exhausting a large quantity of dangerous gases are avoided.
Description
Technical field
The present invention relates to energy recovery field, relate in particular to a kind of cryogenic gas condensate recovery system and method thereof.
Background technique
Its main component of LNG Liquefied natural gas (LNG) is methane, colourless, tasteless, nontoxic and non-corrosiveness, and its volume is with 1/625 of amount gaseous natural gas volume, is the fastest a kind of high-quality clean energy resource of current whole world growth rate.Gaseous natural gas is compressed, be cooled to its boiling point (161.5 DEG C) temperature becomes after LNG, is stored in cryogenic storage tank, then by special purpose ship or tank car transport, when use, again gasifies.Than gaseous natural gas, LNG is because its volume is little, and efficiency of storage is high, a large amount of natural gas transportation can be difficult to any user who arrives to pipeline by special ship or tank car, compared with laying underground gas pipeline, not only reduce investment outlay, and convenient and reliable, risk is little, strong adaptability.Along with LNG world's production capacity increase, demand and application increase, tank car as flexibly easily LNG transporting mode be widely used, the usage quantity of LNG tank car also progressively increase.
According to incompletely statistics, there is the LNG groove tank car of nearly 4000 in the whole nation at present, and according to " liquid gas truck tank safety monitor code " requirement, the tank body of LNG tank car needs third pary certification, comprises Annual survey and complete examination.Wherein Annual survey is at least carried out once every year, completely examines every 6 years and at least carries out once, and tank body generation major accident or down time exceed 1 year, before use, should completely examine.Before annual test, require in whole drain tank rock gas and be replaced as safe gas (as nitrogen etc.).And the pressure of normal groove tank after unloading can approach 0.6MPa left and right, in part tank, also has remaining LNG Liquefied natural gas (LNG).So car owner entering before annual test place, needs rock gas in drain tank, conventional mode is directly emptying at present, has not only wasted the LNG boil-off gas of high-purity, higher calorific value, also has environmental pollution and potential safety problem.
In addition, current national LNG mounted gas cylinder total amount also will reach 500,000, require every 3 years to gas cylinder inspection once according to " gas cylinder safely Supervision Code ".Before inspection, require in whole evacuated vials gas pressure and be replaced as safe gas (as nitrogen etc.).Conventional mode is also directly emptying at present, has not only wasted the LNG boil-off gas of high-quality, and has also had environmental pollution and potential safety problem.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art flow process, a kind of cryogenic gas condensate recovery system and method thereof are provided.
Cryogenic gas condensate recovery system comprises storage tank, pump, switching valve, the first valve, Cryo Refrigerator, liquid container, second valve; Storage tank, pump, switching valve the first entrance are connected in turn, and switching valve outlet, the first valve, Cryo Refrigerator, liquid container are connected in turn, and storage tank is connected with switching valve the second entrance, and switching valve outlet is connected with second valve.
Described Cryo Refrigerator is connected in turn with the 3rd valve, non-condensible gas trap, escape cock.Described storage tank and pump be connected and storage tank is demountable structure with being connected of switching valve the second entrance.Described pump, Cryo Refrigerator, liquid container are positioned on movable fixture.
Cryogenic gas condensation recycling method comprises the steps:
1) tank inner pressure is more than or equal to while switching pressure, and pump cuts out, and switching valve is in the second entrance and outlet connected state, and the first valve is opened, and refrigerator is opened, and second valve is closed; Gas is from storage tank flow through switching valve, the first valve, and entering condensation in Cryo Refrigerator becomes liquid, flows into liquid container; Switch pressure and be greater than 0 and be less than the design pressure of storage tank;
2) tank inner pressure is less than when switching pressure and being more than or equal to minimum working pressure power, and switching valve switches to the first entrance and outlet connected state, and pump is opened; Gas flows out from storage tank, first through pump suction compression, then the switching valve of flowing through, the first valve, entering condensation in Cryo Refrigerator becomes liquid, flows into liquid container; Minimum working pressure power is greater than 0 and be less than switching pressure;
3) when tank inner pressure is less than minimum working pressure power, pump cuts out, and switching valve switches to the second entrance and outlet connected state, and the first valve cuts out, and Cryo Refrigerator cuts out, and second valve is opened; In storage tank, be filled with substitution gas, the gas in storage tank flows out through switching valve, second valve.
Also comprise the steps:
4) when non-condensible gas trap internal pressure exceedes escape cock setting pressure, escape cock is opened, and incoagulable gas flows out through escape cock; Escape cock setting pressure is greater than 0 and be less than the design pressure of storage tank 1.
The invention solves the problem such as recycling and environmental pollution of the rock gas in natural air drain tank car and mounted gas cylinder testing process, realize tank body and gas cylinder and discharge without rock gas in testing process.
Brief description of the drawings
Fig. 1 is cryogenic gas condensate recovery system structural representation;
In figure, storage tank 1, pump 2, switching valve 3, the first valve 4, Cryo Refrigerator 5, liquid container 6, second valve 7, the 3rd valve 8, non-condensible gas trap 9, escape cock 10.
Embodiment
As shown in Figure 1, cryogenic gas condensate recovery system comprises storage tank 1, pump 2, switching valve 3, the first valve 4, Cryo Refrigerator 5, liquid container 6, second valve 7; Storage tank 1, pump 2, switching valve 3 first entrances are connected in turn, and switching valve 3 exports, the first valve 4, Cryo Refrigerator 5, liquid container 6 are connected in turn, and storage tank 1 is connected with switching valve 3 second entrances, and switching valve 3 exports with second valve 7 and is connected.
Described Cryo Refrigerator 5 is connected in turn with the 3rd valve 8, non-condensible gas trap 9, escape cock 10.Described storage tank 1 and pump 2 be connected and storage tank 1 is demountable structure with being connected of switching valve 3 second entrances.Described pump 2, Cryo Refrigerator 5, liquid container 6 are positioned on movable fixture.
Cryogenic gas condensation recycling method comprises the steps:
1) storage tank 1 internal pressure is more than or equal to while switching pressure, and pump 2 cuts out, and switching valve 3 is in the second entrance and outlet connected state, and the first valve 4 is opened, and refrigerator 5 is opened, and second valve 7 is closed; Gas is from storage tank 1 flow through switching valve 3, the first valve 4, and entering condensation in Cryo Refrigerator 5 becomes liquid, flows into liquid container 6, switches pressure and is greater than 0 and be less than the design pressure of storage tank 1;
2) storage tank 1 internal pressure is less than when switching pressure and being more than or equal to minimum working pressure power, and switching valve 3 switches to the first entrance and outlet connected state, and pump 2 is opened; Gas flows out from storage tank 1, first through pump 2 suction compressions, then flow through switching valve 3, the first valve 4, entering condensation in Cryo Refrigerator 5 becomes liquid, flows into liquid container 6; Minimum working pressure power is greater than 0 and be less than switching pressure;
3) when storage tank 1 internal pressure is less than minimum working pressure power, pump 2 cuts out, and switching valve 3 switches to the second entrance and outlet connected state, and the first valve 4 cuts out, and Cryo Refrigerator 5 cuts out, and second valve 7 is opened; In storage tank 1, be filled with substitution gas, the gas in storage tank 1 flows out through switching valve 3, second valve 7.
Also comprise the steps:
4) when non-condensible gas trap 9 internal pressures exceed escape cock 10 setting pressure, escape cock 10 is opened, and incoagulable gas flows out through escape cock 10; Escape cock 10 setting pressures are greater than 0 and be less than the design pressure of storage tank 1.
Embodiment
1) the interior initial pressure 0.6MPa of storage tank 1, is more than or equal to and switches pressure 0.1MPa, and pump 2 cuts out, and switching valve 3 is in the second entrance and outlet connected state, and the first valve 4 is opened, and refrigerator 5 is opened, and second valve 7 is closed; Rock gas is from storage tank 1 flow through switching valve 3, the first valve 4, and entering condensation in Cryo Refrigerator 5 becomes liquid, flows into liquid container 6; The non-condensible gas comprising in rock gas flows into non-condensible gas trap 9 from Cryo Refrigerator 5 through valve 8.
2) storage tank 1 internal pressure is less than while switching pressure 0.1MPa, approximately has recoverys that be liquefied of 86% rock gas in tank, and switching valve 3 switches to the first entrance and exports connected state, and pump 2 is opened; Rock gas flows out from storage tank 1, first through pump 2 suction compressions, then flow through switching valve 3, the first valve 4, entering condensation in Cryo Refrigerator 5 becomes liquid, flows into liquid container 6; The non-condensible gas comprising in rock gas flows into non-condensible gas trap 9 from Cryo Refrigerator 5 through the 3rd valve 8.
3) when storage tank 1 internal pressure is less than minimum working pressure power 0.005MPa, the now more than 99% rock gas recovery that has been liquefied, pump 2 cuts out, switching valve 3 switches to the second entrance and outlet connected state, the first valve 4 cuts out, and Cryo Refrigerator 5 cuts out, and second valve 7 is opened; In storage tank 1, be filled with substitution gas nitrogen or dry air, the gas in storage tank 1 flows out through switching valve 3, second valve 7.
4) when non-condensible gas trap 9 internal pressures exceed escape cock 10 setting pressure 0.2MPa, escape cock 10 is opened, and incoagulable gas flows out through escape cock 10; After being replaced into nitrogen or dry air in detected tank body, carry out follow-up tank body detection.
Liquid container can be by connecting vaporizer from supercharging mode, or connect the mode such as immersed pump and externally export LNG Liquefied natural gas, can be directly used in the filling of LNG mounted gas cylinder, or carry out liquid feeding to other liquefied natural gas (LNG) tank such as gas station storage tank.
Claims (6)
1. a cryogenic gas condensate recovery system, is characterized in that comprising storage tank (1), pump (2), switching valve (3), the first valve (4), Cryo Refrigerator (5), liquid container (6), second valve (7); Storage tank (1), pump (2), switching valve (3) first entrances are connected in turn, switching valve (3) outlet, the first valve (4), Cryo Refrigerator (5), liquid container (6) are connected in turn, storage tank (1) is connected with switching valve (3) second entrances, and switching valve (3) outlet is connected with second valve (7).
2. a kind of cryogenic gas condensate recovery system according to claim 1, it is characterized in that, described Cryo Refrigerator (5) is connected in turn with the 3rd valve (8), non-condensible gas trap (9), escape cock (10).
3. a kind of cryogenic gas condensate recovery system according to claim 1, it is characterized in that described storage tank (1) and pump (2) be connected and storage tank (1) is demountable structure with being connected of switching valve (3) second entrances.
4. according to a kind of cryogenic gas condensate recovery system described in claim 1 or 3, it is characterized in that described pump (2), Cryo Refrigerator (5), liquid container (6) are positioned on movable fixture.
5. use an a kind of cryogenic gas condensation recycling method for system as claimed in claim 1 or 2, it is characterized in that, comprise the steps:
1) storage tank (1) internal pressure is more than or equal to while switching pressure, pump (2) cuts out, and switching valve (3) is in the second entrance and outlet connected state, and the first valve (4) is opened, refrigerator (5) is opened, and second valve (7) is closed; Gas is from storage tank (1) flow through switching valve (3), the first valve (4), and entering condensation in Cryo Refrigerator (5) becomes liquid, flows into liquid container (6); Switch pressure and be greater than 0 and be less than the design pressure of storage tank (1);
2) storage tank (1) internal pressure is less than when switching pressure and being more than or equal to minimum working pressure power, and switching valve (3) switches to the first entrance and outlet connected state, and pump (2) is opened; Gas flows out from storage tank (1), first through pump (2) suction compression, flow through again switching valve (3), the first valve (4), entering condensation in Cryo Refrigerator (5) becomes liquid, flows into liquid container (6); Minimum working pressure power is greater than 0 and be less than switching pressure;
3) when storage tank (1) internal pressure is less than minimum working pressure power, pump (2) cuts out, switching valve (3) switches to the second entrance and outlet connected state, the first valve (4) cuts out, Cryo Refrigerator (5) cuts out, and second valve (7) is opened; In storage tank (1), be filled with substitution gas, the gas in storage tank (1) flows out through switching valve (3), second valve (7).
6. a kind of cryogenic gas condensation recycling method according to claim 5, is characterized in that, also comprises the steps:
4) when non-condensible gas trap (9) internal pressure exceedes escape cock (10) setting pressure, escape cock (10) is opened, and incoagulable gas flows out through escape cock (10); Escape cock (10) setting pressure is greater than 0 and be less than the design pressure of storage tank 1.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090739A (en) * | 2015-08-29 | 2015-11-25 | 华南理工大学 | Multifunctional intelligent scattered natural gas recovery device and method thereof |
| CN105299442A (en) * | 2015-11-20 | 2016-02-03 | 郑龙龟 | Stored gas recycling and filling device of gas cylinder of liquefied petroleum gas truck |
| EP3095759A1 (en) | 2015-05-21 | 2016-11-23 | Yuanming Li | Low-temperature wind tunnel nitrogen recovery device, and recovery method |
| CN108562343A (en) * | 2018-03-15 | 2018-09-21 | 核工业理化工程研究院 | A kind of dynamic running device discharge quantity test device and test method |
| CN113623533A (en) * | 2021-08-24 | 2021-11-09 | 贵州盈德气体有限公司 | Non-condensable gas filtering and recycling process for liquid argon system |
| CN113800140A (en) * | 2020-06-17 | 2021-12-17 | 国家能源投资集团有限责任公司 | System and method for managing pressure in an underground cryogenic liquid storage tank |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86207843U (en) * | 1986-10-11 | 1987-09-02 | 机械工业部第七设计研究院 | Gasfilling and recollecting apparatus |
| CN2209755Y (en) * | 1994-09-01 | 1995-10-11 | 机械工业部第七设计研究院 | Gas filling and recovery device |
| CN2260228Y (en) * | 1995-06-13 | 1997-08-20 | 机械工业部第七设计研究院 | Apparatus for filling or recovering gas SF6 of oil-free type |
| JPH10274395A (en) * | 1997-03-27 | 1998-10-13 | Tonen Corp | Natural gas regionally supplying system |
| JPH11336999A (en) * | 1998-05-25 | 1999-12-07 | Nippon Gas Kaihatsu Kk | Supply method for liquefied gas and device therefor |
| CN200975826Y (en) * | 2006-11-30 | 2007-11-14 | 牛东 | Industrial waste gas reclaiming liquify arrangement |
| CN202012731U (en) * | 2011-03-26 | 2011-10-19 | 宁波鲍斯能源装备股份有限公司 | Device for recovering LNG (liquefied natural gas) evaporated gas and liquefying again |
| CN203463932U (en) * | 2013-08-05 | 2014-03-05 | 河南科益气体工程有限公司 | Argon recovery device |
| CN103697327A (en) * | 2013-12-13 | 2014-04-02 | 杭州克劳特低温设备有限公司 | Zero-emission liquid adding system and zero-emission liquid adding method thereof |
| CN204005219U (en) * | 2014-07-29 | 2014-12-10 | 江苏克劳特低温技术有限公司 | A kind of cryogenic gas condensate recovery system |
-
2014
- 2014-07-29 CN CN201410365073.0A patent/CN104110574B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86207843U (en) * | 1986-10-11 | 1987-09-02 | 机械工业部第七设计研究院 | Gasfilling and recollecting apparatus |
| CN2209755Y (en) * | 1994-09-01 | 1995-10-11 | 机械工业部第七设计研究院 | Gas filling and recovery device |
| CN2260228Y (en) * | 1995-06-13 | 1997-08-20 | 机械工业部第七设计研究院 | Apparatus for filling or recovering gas SF6 of oil-free type |
| JPH10274395A (en) * | 1997-03-27 | 1998-10-13 | Tonen Corp | Natural gas regionally supplying system |
| JPH11336999A (en) * | 1998-05-25 | 1999-12-07 | Nippon Gas Kaihatsu Kk | Supply method for liquefied gas and device therefor |
| CN200975826Y (en) * | 2006-11-30 | 2007-11-14 | 牛东 | Industrial waste gas reclaiming liquify arrangement |
| CN202012731U (en) * | 2011-03-26 | 2011-10-19 | 宁波鲍斯能源装备股份有限公司 | Device for recovering LNG (liquefied natural gas) evaporated gas and liquefying again |
| CN203463932U (en) * | 2013-08-05 | 2014-03-05 | 河南科益气体工程有限公司 | Argon recovery device |
| CN103697327A (en) * | 2013-12-13 | 2014-04-02 | 杭州克劳特低温设备有限公司 | Zero-emission liquid adding system and zero-emission liquid adding method thereof |
| CN204005219U (en) * | 2014-07-29 | 2014-12-10 | 江苏克劳特低温技术有限公司 | A kind of cryogenic gas condensate recovery system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3095759A1 (en) | 2015-05-21 | 2016-11-23 | Yuanming Li | Low-temperature wind tunnel nitrogen recovery device, and recovery method |
| CN105090739A (en) * | 2015-08-29 | 2015-11-25 | 华南理工大学 | Multifunctional intelligent scattered natural gas recovery device and method thereof |
| CN105299442A (en) * | 2015-11-20 | 2016-02-03 | 郑龙龟 | Stored gas recycling and filling device of gas cylinder of liquefied petroleum gas truck |
| CN108562343A (en) * | 2018-03-15 | 2018-09-21 | 核工业理化工程研究院 | A kind of dynamic running device discharge quantity test device and test method |
| CN108562343B (en) * | 2018-03-15 | 2024-01-26 | 核工业理化工程研究院 | Device and method for testing ventilation capacity of dynamic operation equipment |
| CN113800140A (en) * | 2020-06-17 | 2021-12-17 | 国家能源投资集团有限责任公司 | System and method for managing pressure in an underground cryogenic liquid storage tank |
| CN113623533A (en) * | 2021-08-24 | 2021-11-09 | 贵州盈德气体有限公司 | Non-condensable gas filtering and recycling process for liquid argon system |
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| CN104110574B (en) | 2016-08-31 |
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