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A coal gas purification method

A gas and purification tower technology, applied in the removal of gas pollutants, the selection of absorbent solid gas purification, etc., can solve the problem of unclean removal of benzene and naphthalene, excessive sulfur dioxide emissions, easy blockage of compressor cooling pipes, etc. problem, to achieve stable operation of the device, reduce the amount of desulfurization, and reduce the number of effects

Pending Publication Date: 2018-06-15
湖北申昙环保新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that in the prior art, it mainly solves the technical problems that sulfide, tar, benzene and naphthalene are not cleanly removed in the gas purification in the prior art, resulting in the easy blockage of the compressor cooling pipeline and excessive sulfur dioxide discharge. The invention provides a new coke oven gas purification method

Method used

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  • A coal gas purification method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] as attached figure 1 As shown, the coke oven gas from the coke oven enters the crude desulfurization unit, and after crude desulfurization, stream I is formed. Among them, Y zeolite molecular sieve adsorbent is used for crude desulfurization, and benzene is removed by adsorption; the benzene concentration in stream I is 200mg / m 3 Between, the concentration of naphthalene is 100mg / m 3 Between, the concentration of hydrogen sulfide is 500mg / m 3 Between; stream Ⅰ enters the comprehensive purification tower, said comprehensive purification tower contains ZSM molecular sieve adsorbent, removes aromatics and sulfides in the gas at the same time, and forms stream Ⅱ, the benzene concentration in stream Ⅱ is less than 100mg / m 3 , naphthalene concentration is less than 4 mg / m 3 Between, hydrogen sulfide concentration is less than 4mg / m 3 ; After being compressed by the compressor, the logistics II is sent to the gas turbine for power generation. The device has been running con...

Embodiment 2

[0037] The coke oven gas from the coke oven enters the crude desulfurization unit, and then enters the crude desulfurization unit. After crude desulfurization, stream I is formed. Among them, the crude desulfurization uses mordenite molecular sieve adsorbent, and the benzene is removed by adsorption; the benzene concentration in stream I is 600mg / m 3 , naphthalene concentration is 50mg / m 3 , the concentration of hydrogen sulfide is 200mg / m 3 ; Stream I enters a comprehensive purification tower, which contains ZSM molecular sieve adsorbents, and simultaneously removes aromatics and sulfides in the gas to form stream II, where the benzene concentration in stream II is less than 50 mg / m 3 , naphthalene concentration is less than 2mg / m 3 Between, hydrogen sulfide concentration is less than 2mg / m 3 ; After being compressed by the compressor, the logistics II is sent to the gas turbine for power generation. The device has been running continuously for more than 4 months. The conc...

Embodiment 3

[0039] The coke oven gas from the coke oven enters the crude desulfurization unit, and then enters the crude desulfurization unit. After crude desulfurization, stream I is formed. Copper-modified 13X molecular sieve adsorbent is used for crude desulfurization, and the concentration of benzene in stream I is 500mg / m 3 , naphthalene concentration is 40mg / m 3 , the concentration of hydrogen sulfide is 2000mg / m 3 Between; stream I enters the comprehensive purification tower, said comprehensive purification tower contains Y molecular sieve adsorbents, removes aromatics and sulfides in the gas at the same time, and forms stream II, the benzene concentration in stream II is less than 60mg / m 3 , the concentration of naphthalene is less than 1 mg / m 3 Between, hydrogen sulfide concentration is less than 1mg / m 3 ; Concentration in toluene, xylene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, and fennel is less than 1 mg / m 3 Between; sulfides are hydrogen sulfide, sulfur di...

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Abstract

The invention relates to a coal gas purification method and mainly overcomes a technical problem that cooling pipelines of compressors are liable to be blocked and sulfur dioxide emission is excessivebecause sulfides, tar, benzene and naphthalene are not thoroughly removed in coke oven gas purification in the prior art. The problem is solved well by adopting a technical scheme, wherein the methodincludes a) feeding coal gas from a coking plant into a crude desulfurization unit to form a stream I; b) feeding the stream I into an integrated purification column so that aromatic hydrocarbons andsulfides in the gas are adsorbed and a stream II is formed; and c) feeding the stream II into a compressor, compressing the stream II, and then conveying the stream II to a gas turbine for power generation. The method can be applied in industrial production of power generation with coke oven gas.

Description

technical field [0001] The invention relates to a method for purifying coal gas, in particular to a method for purifying coke oven gas used for combustion engine power generation. Background technique [0002] Coke oven gas is mainly a high-energy combustible gas containing hydrocarbons, methane, and hydrogen produced by coking plants, and is generally used as gas-fired power generation. Since the thermal efficiency of gas turbine power generation is higher than that of steam turbine, gas turbine power generation is generally used for coke oven gas power generation in coking plants. However, gas turbine power generation has high requirements on the purity of gas. It is necessary to remove organic substances such as benzene, toluene, xylene, naphthalene, and tar in coke oven gas to prevent clogging of gas turbine nozzles. It is also necessary to remove sulfides in coke oven gas to prevent The emission of sulfur dioxide in the flue gas after combustion exceeds the standard. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/32
CPCC10K1/002C10K1/004C10K1/32
Inventor 彭继荣孙广亿虞文胜马海洋李建江年冯友祥
Owner 湖北申昙环保新材料有限公司
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