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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 easy blockage of compressor cooling pipes, unclean removal of benzene and naphthalene, excessive sulfur dioxide emissions, etc. problem, achieve the effect of reducing the quantity, stabilizing the operation of the device and reducing the production cost

Inactive 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

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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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Effect test

Embodiment 1

[0037] as attached figure 1 As shown, the coke oven gas from the coke oven enters the crude debenzene unit, and after the crude debenzene, stream I is formed. Among them, Y zeolite molecular sieve adsorbent is used for the crude debenzene, and the benzene is removed by adsorption; the benzene concentration in stream I is 200mg / m 3 Between, naphthalene concentration is 50mg / m 3 Then, the coal gas enters the crude desulfurization unit, and stream I is formed after crude desulfurization. Among them, the crude desulfurization adopts rare earth Y zeolite molecular sieve adsorbent, and the benzene is removed by adsorption method; the benzene concentration in stream I is 200mg / m3 3 , naphthalene concentration is 100mg / m 3 , the concentration of hydrogen sulfide is 200mg / m 3 ; Stream II enters the comprehensive purification tower, which contains ZSM molecular sieve adsorbent, and simultaneously removes aromatics and sulfides in the gas to form stream III, in which the concentration...

Embodiment 2

[0039] The coke oven gas from the coke oven enters the crude debenzene unit, and the crude debenzene forms stream I. The crude debenzene adopts ZSM-5 molecular sieve adsorbent, and the benzene concentration in stream I is 200mg / m 3 , naphthalene concentration is 80mg / m 3 , the concentration of hydrogen sulfide is 4000mg / m 3 ; Then enter the crude desulfurization unit, then enter the crude desulfurization unit, and form stream II after crude desulfurization, wherein, the crude desulfurization adopts mordenite molecular sieve adsorbent, and removes benzene by the method of adsorption; wherein the benzene concentration in stream II is 100mg / m 3 , naphthalene concentration is 50mg / m 3 , the concentration of hydrogen sulfide is 200mg / m 3 ; Stream II enters a comprehensive purification tower, which contains ZSM molecular sieve adsorbents, and removes aromatics and sulfides in the gas at the same time to form stream III. The benzene concentration in stream III is less than 50 mg / m ...

Embodiment 3

[0041] The coke oven gas from the coke oven enters the crude debenzene unit, and the crude debenzene forms stream I. The crude debenzene adopts ZSM-5 molecular sieve adsorbent, and the benzene concentration in stream I is 200mg / m 3 , naphthalene concentration is 80mg / m 3 , the concentration of hydrogen sulfide is 4000mg / m 3 Then enter the crude desulfurization unit, then enter the crude desulfurization unit, and form stream II after crude desulfurization, wherein, crude desulfurization adopts copper-modified 13X molecular sieve adsorbent, and removes benzene by the method of adsorption; wherein the concentration of benzene in stream II is 100mg / m 3 , naphthalene concentration is 50mg / m 3 , the concentration of hydrogen sulfide is 200mg / m 3 ; Stream II enters the comprehensive purification tower, which contains ZSM molecular sieve adsorbent, and simultaneously removes aromatics and sulfides in the gas to form stream III,

[0042] Benzene concentration in stream III is less...

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Abstract

The invention relates to a coal gas purification method to mainly overcome a technical problem that cooling pipelines of compressors are liable to be blocked and sulfur dioxide emission is excessive because 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 method includes a) feeding coke oven gas discharged from a coke oven into a crude debenzolization unit, and performing crude debenzolization to form a stream I, with a molecular sieve adsorbent A being adopted in crude debenzolization; b) feeding the stream I into a crude desulfurization unit, and performing crude desulfurization to form a stream II, with a molecular sieve adsorbent B being adopted in crude desulfurization; c) feeding the stream II into an integrated purification column containing a molecular sieve adsorbent C, and removing residual aromatic hydrocarbons and sulfides in the gas at thesame time to form a stream III; and d) feeding the stream III into a subsequent gas utilization workshop section. The method can be applied in industrial production of power generation with coke ovengas.

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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IPC IPC(8): C10K1/32
CPCC10K1/002C10K1/004C10K1/32
Inventor 彭继荣孙广亿虞文胜马海洋李建周稳华江年
Owner 湖北申昙环保新材料有限公司
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