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    City gas

    • Last Update: 2020-11-24
    • Source: Internet
    • Author: User
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    gas is from coal, coke, semi-coke and other solid fuels and heavy oil and other liquid fuels processed, can be divided into dry distillate gas and gasification gas. Dry distillate gas includes high temperature, medium temperature, low temperature dry distillate gas, the main components are alkanes, olefins,
    aromatics
    , carbon monoxide and hydrogen and other flammable gases, and contains a small amount of nitrogen, carbon dioxide and other non-gas, high thermal value, about 1.7×104 to 2.54kJ/m3×. Gasification gas includes furnace gas, water gas, semi-water gas, etc., the main combustible components are carbon monoxide and hydrogen, and contains a large amount of nitrogen and carbon dioxide, the thermal value is low, about 4.2×103 to 1.3×104kJ/m3. In addition, there is blast furnace gas and so on. Urban gas plants generally use three methods to produce gas, the resulting gas is called coke oven gas, water gas and furnace gas. The three types of gas are mixed (determined by laboratory analysis) to provide use based on thermal value, combustion performance and price and cost. Coke oven gas, referred to as coke oven gas, is coal in the coking furnace dry distillation of gas, the main components are methane, hydrogen, carbon monoxide, but also contains a small amount of ethane, ethylene, nitrogen, carbon dioxide and so on. Water gas is a gas produced by steam and red heat anthrax or coke in a gas furnace, the main components are hydrogen and carbon monoxide, but also contains a small amount of carbon dioxide. Furnace gas is gas produced by the reaction of air (or oxygen) and a small amount of water vapor and solid fuel (coal or coke) in the furnace, the main components are carbon monoxide and nitrogen, of which nitrogen accounts for more than 50%, also contains carbon dioxide and hydrogen.
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