Natural gas purification process

Abstract

The invention discloses a natural gas purification process. The natural gas purification process comprises the following steps: (a) firstly, solid impurities contained in natural gas are removed through an adsorbing device; (b) then, the natural gas, primarily removed impurities, is introduced in a heat exchanger for heat exchange warming; (c) then, the natural gas is introduced in a liquid loop compressor for compressing after the heat exchange warming; (d) the compressed gas is desulfurized; (e) the desulfurized gas is introduced in a membrane separator for separating; (f) the separated gas is deeply desulfurized and decarbonized; (g) finally, the refrigeration is implemented to obtain pure natural gas. The natural gas purification process can quickly purify the natural gas, has high purification efficiency and low purification cost, and reduces the pollution of atmosphere from the impurities contained in the natural gas.

Description

technical field [0001] The invention relates to a natural gas purification process. Background technique [0002] Natural gas is a multi-component mixed gaseous fossil fuel, the main component is alkanes, of which methane accounts for the vast majority, and a small amount of ethane, propane and butane. It mainly exists in oil fields and natural gas fields, and a small amount comes out of coal seams. There is no waste residue or waste water after natural gas is burned. Compared with coal, oil and other energy sources, it has the advantages of safe use, high calorific value, and cleanliness. [0003] In a broad definition, natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, biosphere and lithosphere. The definition of "natural gas" that people have used for a long time is a narrow definition from the perspective of energy, which refers to the mixture of hydrocarbon and non-hydrocar...

AI Technical Summary

Problems solved by technology

[0007] Although natural gas is colorless and odorless, mercaptans are used to add an odor to the natural gas before it is sent to the end user to aid in leak detection. Natural gas is not as toxic as carbon monoxide and is inherently harmless to humans .However, if natural gas is in a state of high concentration and the oxygen in the air is not enough to sustain life, it will still cause death. After all, natural gas cannot be used for human breathing

As a fuel, natural gas will also cause casualties due to explosion. Although natural gas is lighter than air and is easy to disperse, when the natural gas gathers in a closed environment such as a house or tent, when it reaches a certain proportion, it will trigger a powerful explosion. Explosion. Explosion can level an entire house and even damage adjacent structures. Methane has a lower limit of 5% and a higher limit of 15% in air