城市燃气分类(国外英文资料).docVIP

城市燃气分类(国外英文资料) Urban gas classification City gas is an indispensable infrastructure of modern city, and city gas is a high-quality fuel gas source, which is closely related to peoples life. Gas is a general term for gaseous fuels and is customarily divided into four categories: natural gas, artificial gas, liquefied petroleum gas, and alternative natural gas. 1) natural gas: a flammable gas naturally occurring in the ground, called natural gas. Natural gas is widely distributed in China, Chinas use of natural gas in Sichuan Zigong artesian, has 5000 years of history, and the use of natural gas is the first country in the world that. According to the way of mining and formation, natural gas can be divided into 5 kinds: Pure natural gas: the gas field mined from underground is pure natural gas; The petroleum gas: with oil for a gas called the petroleum gas; Mine gas: mine gas collected when coal is mined; Coalbed methane: coal gas extracted from underground coal seams; Condensate gas: gas containing light fractions of petroleum. In order to facilitate transportation, natural gas can be formed after processing: Compressed natural gas: when compressed natural gas is compressed to 200kg/cm2, the volume of natural gas is reduced by 200 times, and stored in containers, which is convenient for automobile transportation, and the economic transport radius is 150-200 kilometers. Compressed natural gas can be used for civilian use and as a clean fuel for automobiles; Liquefied natural gas (LNG): liquefied natural gas (LNG) is liquefied at low temperature and becomes liquid in the case of 1600C. It becomes liquefied natural gas and is transported by liquefied methane carriers and special vehicles. 2) artificial gas It is a general term for all kinds of artificial gas. Coal and heavy oil are its raw materials: The coal dry distillation gas in the industrial furnace (coke oven and wood stove) in the air heating, the process of coal physical and chemical change called distillation