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Method of liquefying natural gas and apparatus thereof

A natural gas, gas-liquid two-phase flow technology, applied in the direction of liquefaction, refrigeration and liquefaction, gas fuel, etc., can solve the problem of no method and practical device, etc., and achieve the effect of cost saving

Inactive Publication Date: 2007-09-12
重庆大山燃气设备有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, only stay on theoretical discussion, so far there is no real implementation method and its practical device.

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  • Method of liquefying natural gas and apparatus thereof
  • Method of liquefying natural gas and apparatus thereof
  • Method of liquefying natural gas and apparatus thereof

Examples

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Embodiment Construction

[0045] A process for the liquefaction of natural gas using a compressor and a refrigerant. Only one compressor is needed in the method of the invention, and the refrigerant of the invention is a circulating refrigerant mixed with propane, ethylene and methane. The weight mixing ratio of propane, ethylene and methane was 1.76:1.27:1.0.

[0046] Its natural gas liquefaction process includes:

[0047] a. A step of sucking raw natural gas from which impurities have been removed and circulating refrigerant into the compressor for compression. In this step, the outlet pressure of the compressor is 3.0Mpa-4.0Mpa, and the outlet temperature is 120°C-140°C.

[0048] b. Cool the high-temperature and high-pressure mixed gas output from the compressor, and then separate the heavy hydrocarbon component brought from the raw natural gas and condensed into liquid after cooling from the mixed gas, and remove the heavy hydrocarbon Component steps. In this step, the temperature of the cooled...

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Abstract

This invention relates to a method and a device for liquidizing natural gas, which uses a compressor only to compress a circulation cryogen and raw natural gas mixed by propane, ethane and methane to further liquidize natural gas, in which, the whole set includes a compressor, a cooler, a separating box of different components and a cooler of different components, a separation box of un-condensed gas and a liquid natural gas storage tank connected orderly, which puts forward a method for controlling the resorption volume of the components in the way of liquid-level monitor and the structure of the device after solving the problem of evaporization in stages and corresponding components in the resorption circulation crygen and only two sets of gas flows exchange heat to further simplify the device structure and its operation technology.

Description

technical field [0001] The invention relates to a gas liquefaction method and a device thereof, in particular to a method and a device for liquefying coal bed methane with a methane content of more than 90% and natural gas produced by low-yield gas wells. Background technique [0002] The components of coal bed methane (also known as gas) include alkane combustible gases mainly methane. Natural gas extracted from gas wells is also alkane combustible gas mainly composed of methane. Therefore, in this case, the two are collectively referred to as natural gas. [0003] Among them, the natural gas in the coal seam is the culprit of gas explosions in coal mines and mine disasters. One of ways to prevent the gas explosion is to extract the natural gas through the gas-collecting pipeline drilled into the coal seam before coal seam mining. The extracted natural gas is used in the daily life of nearby residents. But when too much natural gas is pumped out and nearby residents can...

Claims

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Application Information

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IPC IPC(8): C10L3/10
CPCF25J1/0022F25J1/004F25J1/0045F25J1/0202F25J1/0257F25J1/0262F25J5/002F25J2220/62
Inventor 盛昌源
Owner 重庆大山燃气设备有限公司
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