A kind of natural gas liquefaction method
A technology of natural gas and gas tank, which is applied in the directions of liquefaction, refrigeration, liquefaction and solidification. Effect
Active Publication Date: 2021-07-16
广东广物能源科技有限公司
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Problems solved by technology
[0003] When liquefying natural gas in a hot environment, the liquefaction of natural gas is carried out in the condenser. It is necessary to continuously exchange heat between the low-pressure gas that expands and cools down with the high-pressure gas. After many cycles, the natural gas in the condenser meets the liquefaction requirements. When liquefying a large amount of natural gas, the process needs to be carried out in a heat-insulated environment, and the heat exchange efficiency of the existing condenser is not high, which cannot meet the requirements of large-scale liquefaction of natural gas. Therefore, a natural gas liquefaction method is proposed to solve the above problems method
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[0028] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0029] like Figure 1-Figure 6 Shown, a kind of natural gas liquefaction method described in the present invention, this liquefaction method comprises the following steps:
[0030] S1: Preparation of raw material gas: Pass coke oven gas and coal gas into the gas cabinet and mix fully to obtain a mixed gas. The volume of the mixed gas is 5-50% and then undergoes sulfur-resistant water-vapor shift or CO 2 After reforming, it is mixed with the rest of the mixed gas to obtain crude raw material gas, which can meet the needs of methanation;
[0031] S2: Purify the crude raw material gas in S1 after compression to remove H 2 S and CO 2 , removed hydrogen sulfide desulfurization recovery, removed CO 2 The gas is vented, and the purified raw material ...
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The invention relates to the technical field of natural gas liquefaction, in particular to a natural gas liquefaction method. The liquefaction device used in the liquefaction method includes an adiabatic structure, a cold medium delivery structure, a natural gas delivery structure and a liquid-gas separation structure. The inner wall of the cold medium delivery structure is fixed A natural gas transmission structure is installed, and a liquid-gas separation structure is fixedly installed between the natural gas transmission structure and the refrigerant medium transmission structure. The heat insulation structure includes a protective shell, a shell cover and a bottom plate. An inspection port is provided. In the natural gas liquefaction method described in the present invention, the high-pressure natural gas enters the gas-liquid two-phase space from the gas inlet pipe through the setting of the cold medium medium conveying structure and the natural gas conveying structure, and flows from the annular passage along the No. 3 The plate spirals up, and the process fully exchanges heat with the low-temperature medium in the inner and outer fluid chambers, thereby effectively reducing the temperature of the high-pressure natural gas.
Description
technical field [0001] The invention relates to the technical field of natural gas liquefaction, in particular to a natural gas liquefaction method. Background technique [0002] Natural gas refers to the combustible gas stored in the formation, mainly a mixture of low molecular alkanes, which can be divided into two types: dry gas and wet natural gas. Much ethane, propane and butane etc. Liquefied natural gas is natural gas that becomes liquid after being compressed and cooled to its boiling point (-161.5°C). Usually, liquefied natural gas is stored in a low-temperature storage tank at -161.5°C and 0.1MPa. Its main component is methane, which is transported by special ships or tank trucks and regasified when used. [0003] When liquefying natural gas in a hot environment, the liquefaction of natural gas is carried out in the condenser. It is necessary to continuously exchange heat between the low-pressure gas that expands and cools down with the high-pressure gas. After m...
Claims
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IPC IPC(8): F25J1/00F25J5/00
CPCF25J1/0022F25J5/00
Inventor 狄风君徐浩刘金宝
Owner 广东广物能源科技有限公司