Coal gas purifying method

Abstract

The present invention is characterized by that it adopts the high temperature produced by adding proper quantity of industrial pure oxygen and small quantity of hot gas into uncooled hot gas to make them produce reaction to make the tar, naphthalene, benzene, organic sulfur and ammonia, etc. being in gas be cracked and converted into CO, H2, N2 and H2S, and can remove H2S at normal temperature. Said method can be used for purifying coke oven gas and non-anthracite gas, can make coke oven gas be raised by about 10%-25%.

Description

Technical field: [0001] The invention belongs to the field of gas purification in chemical engineering, in particular to a method for purifying pitch, tar, naphthalene, benzene, benzene, cyanide and the like in coal gas produced from coal coking and non-anthracite. Background technique: [0002] The uncooled coke oven gas produced during the coal coking process is usually called raw coal gas. The current purification method is to spray and circulate ammonia water to condense the high-temperature tar mist in the raw coal gas into liquid tar when the raw coal gas enters the gas collection pipe. , coke oven gas is separated with circulating ammonia water, and low temperature tar and naphthalene, benzene, ammonia, hydrogen sulfide, cyanide, etc. are separated from coke oven gas by physical or chemical absorption at room temperature. Due to the complex composition of coke oven gas in the traditional coke oven gas purification process, in order to recover as many chemical products...

AI Technical Summary

Problems solved by technology

Due to the complex composition of coke oven gas in the traditional coke oven gas purification process, in order to recover as many chemical products as possible to reduce the purification cost, more than 10 processes and nearly 100 equipment have to be installed to realize the purification of coke oven gas At the same time, chemical products are separated. This process is economical for large coking plants, but it is not economical for the purification of coke oven gas produced by many small and medium-sized coking plants in China.

Due to the small scale, not only the total amount of recovered chemical products is small, the cost is high, but the quality is also low; due to the many process steps, the process complexity, process equipment and process control parameters are numerous, the stability of the process is low, and the environmental pollution is serious. , equipment maintenance costs are high, process equipment occupies a large area, the number of posts is large, the working environment of workers is poor, labor intensity is high, management is difficult, and it is difficult to make a profit

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