Coal gas purifying method

A gas and gas furnace technology, which is applied in the field of gas purification in chemical engineering, can solve the problems of high cost, large area occupied by process equipment, and various process control parameters.

Inactive Publication Date: 2004-01-28
苏大为 +1
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  • Abstract
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  • Claims
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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 sca

Method used

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Embodiment Construction

[0028] Specific embodiments of the present invention are as attached to the specification figure 1 As shown, the high-temperature hot coke oven gas 1 from the top of the coke oven at about 600°C to 800°C is sent to the gas heat exchanger 4 through the insulated pipeline, and the temperature rises to 900°C to 1000°C after heat exchange with the cracked gas. It is sent to the upper part of the cracking reformer 3, mixed with an appropriate amount of process oxygen sent from the oxygen generator 2, and burned. When the temperature rises to 1100℃~1300℃, most of the tar, benzene group, naphthalene group, organic sulfur, cyanide and ammonia in the coke oven gas are cracked into low molecular weight compounds or simple substances under the action of high temperature. While falling, H in the gas 2 O undergoes a conversion reaction to produce CO and H 2 After completing the cracking conversion reaction of the coal gas, the temperature drops to 1100°C-1200°C, and after most of the dus...

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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...

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Application Information

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IPC IPC(8): C10K1/00
Inventor 李开健苏大为
Owner 苏大为
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