Method of the utilization of waste heat of low-concentration combustibles

Abstract

A method of the utilization of waste heat of low-concentration combustibles is disclosed, belonging to the field of the treatment of industry low-concentration combustible waste gas; the purpose of the invention is to provide a method for reasonable burning of and reutilization of low-concentration combustible waste gas, in order to solve the problem the invention uses a technical proposal as follows: the low-concentration combustible gas is discharged out and fed into a settling chamber, tail gas is subjected to inertial separation at first and then fed into a chamber for secondary combustion, after the temperature of the secondary combustion reaches 900-1100 DEG C, the secondary combustion device is stopped, the tail gas is subsequently fed into a burning chamber for burning, and the waste heat is utilized through a waste heat boiler; the invention method for the utilization of waste heat of low-concentration combustibles is adapted to the recovery and the reutilization of tail gas in coal conversion industries such as coking as well as gasification and liquefaction of active carbon, carbon and coal and also in steel-making industry.

Description

technical field [0001] The waste heat utilization method of low-concentration combustibles of the invention belongs to the field of industrial low-concentration combustible waste gas treatment. Background technique [0002] Energy is an important material basis for ensuring social stability and developing the national economy. In today's world, the consumption of energy is increasing sharply, and the shadow of energy crisis hangs over the whole world. Energy conservation and consumption reduction has become the basic policy of the energy industry in all countries in the world. [0003] Under the general policy of energy saving and consumption reduction, industrial waste gas is an important part that cannot be ignored, and the environmental problems brought about by it have attracted the attention of the country. At present, in the coal conversion industry, such as coking, activated carbon, carbon, coal gasification and liquefaction, carbon black and other industries and ste...

AI Technical Summary

Problems solved by technology

At present, in the coal conversion industry, such as coking, activated carbon, carbon, coal gasification and liquefaction, carbon black and other industries and steelmaking industries, there are different grades of combustible tail gas produced, but due to the limitations of equipment level, process level and other factors, tail gas The recovery rate is less than 30%, and most of the recovered gas is high-calorific value gas. A large amount of low-grade waste heat exhaust gas cannot be recovered due to its low concentration, low temperature, and low calorific value. It is treated by direct exhaust to the atmosphere.