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Cryogenic gas condensing and recycling system and method

A technology of condensation recovery and low-temperature gas, which is applied in container filling methods, container discharge methods, gas/liquid distribution and storage, etc., and can solve problems such as waste of LNG evaporated gas, environmental pollution safety, etc.

Active Publication Date: 2014-10-22
JIANGSU CRYOTE CRYOGENIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used method is direct emptying, which not only wastes high-quality LNG vapor, but also has environmental pollution and potential safety problems.

Method used

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  • Cryogenic gas condensing and recycling system and method

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Embodiment

[0026] 1) The initial pressure in the storage tank 1 is 0.6MPa, greater than or equal to the switching pressure of 0.1MPa, the pump 2 is closed, the switching valve 3 is in the state of connecting the second inlet and the outlet, the first valve 4 is opened, the refrigerator 5 is opened, and the second valve 7 is closed The natural gas flows through the switching valve 3 and the first valve 4 from the storage tank 1, enters the cryogenic refrigerator 5 and condenses into a liquid, and flows into the liquid storage tank 6; the non-condensable gas contained in the natural gas flows into the non-condensable gas from the cryogenic refrigerator 5 through the valve 8 Condensate collector 9.

[0027] 2) When the pressure in storage tank 1 is lower than the switching pressure of 0.1MPa, about 86% of the natural gas in the tank has been liquefied and recovered, switching valve 3 is switched to the state of connecting the first inlet and outlet, pump 2 is turned on; natural gas flows out...

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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 [0001] The invention relates to the field of energy recovery, in particular to a low-temperature gas condensation recovery system and a method thereof. Background technique [0002] The main component of liquefied natural gas (LNG) is methane, which is colorless, odorless, non-toxic and non-corrosive. Its volume is 1 / 625 of the volume of the same amount of gaseous natural gas. It is currently the fastest growing high-quality clean energy in the world . Gaseous natural gas is compressed and cooled to its boiling point (-161.5°C) to become LNG, stored in low-temperature storage tanks, transported by special ships or tank trucks, and re-gasified when used. Compared with gaseous natural gas, due to its small size and high storage efficiency, LNG can transport a large amount of natural gas to any user who is difficult to reach through a special ship or tanker. Compared with laying underground gas pipelines, it not only saves investment, Moreover, it is convenien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C7/00F17C13/00
Inventor 程章展鲁雪生
Owner JIANGSU CRYOTE CRYOGENIC TECH
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