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Blast furnace gas fine desulfurization method and fine desulfurization system

A blast furnace gas, fine desulfurization technology, applied to chemical instruments and methods, gas dust removal, sulfur compounds, etc., can solve problems that cannot be directly applied, and achieve the effects of reducing corrosion, huge economic and social benefits, and quality assurance

Inactive Publication Date: 2020-08-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coke oven gas fine desulfurization and chemical industry CO raw material gas desulfurization technology and engineering case applications can be used for reference, but due to the particularity of blast furnace gas, the above technologies cannot be directly applied, so blast furnace gas fine desulfurization technology is still at the cutting-edge exploration stage

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  • Blast furnace gas fine desulfurization method and fine desulfurization system

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Effect test

Embodiment 1

[0064] This embodiment provides a method for fine desulfurization of blast furnace gas. The fine desulfurization method is carried out in the fine desulfurization system provided in the specific embodiment, and specifically includes the following steps:

[0065] (1) The dust content is 5g / m 3 , the blast furnace gas at a temperature of 180°C is subjected to gravity dust removal and bag dust removal in sequence, and the dust content of the blast furnace gas after gravity dust removal and bag dust removal is 1mg / m 3 , the outlet temperature is 100°C;

[0066] (2) The blast furnace gas after dedusting enters the organic sulfur conversion device 3, and the organic sulfur conversion device 3 is filled with honeycomb γ-Al 2 o 3 , the organic sulfur in the blast furnace gas is hydrolyzed into H 2 S, the operating temperature in the organic sulfur conversion unit 3 is 80°C, and the operating pressure in the organic sulfur conversion unit 3 is 160kPa;

[0067](3) The blast furnace ...

Embodiment 2

[0072] This embodiment provides a method for fine desulfurization of blast furnace gas. The fine desulfurization method is carried out in the fine desulfurization system provided in the specific embodiment, and specifically includes the following steps:

[0073] (1) The dust content is 6g / m 3 , the blast furnace gas at a temperature of 183°C is subjected to gravity dust removal and bag dust removal in sequence, and the dust content of the blast furnace gas after gravity dust removal and bag dust removal is 2mg / m 3 , the outlet temperature is 120°C;

[0074] (2) The blast furnace gas after dedusting enters the organic sulfur conversion device 3, and the organic sulfur conversion device 3 is filled with honeycomb γ-Al 2 o 3 , the organic sulfur in the blast furnace gas is hydrolyzed into H 2 S, the operating temperature in the organic sulfur conversion unit 3 is 100°C, and the operating pressure in the organic sulfur conversion unit 3 is 150kPa;

[0075] (3) The blast furnac...

Embodiment 3

[0080] This embodiment provides a method for fine desulfurization of blast furnace gas. The fine desulfurization method is carried out in the fine desulfurization system provided in the specific embodiment, and specifically includes the following steps:

[0081] (1) The dust content is 7g / m 3 , the blast furnace gas at a temperature of 185 ° C is subjected to gravity dust removal and bag dust removal in sequence, and the dust content of the blast furnace gas after gravity dust removal and bag dust removal is 3 mg / m 3 , the outlet temperature is 130°C;

[0082] (2) The blast furnace gas after dedusting enters the organic sulfur conversion device 3, and the organic sulfur conversion device 3 is filled with honeycomb γ-Al 2 o 3 , the organic sulfur in the blast furnace gas is hydrolyzed into H 2 S, the operating temperature in the organic sulfur conversion unit 3 is 120°C, and the operating pressure in the organic sulfur conversion unit 3 is 140kPa;

[0083] (3) The blast fur...

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Abstract

The invention provides a blast furnace gas fine desulfurization method and a blast furnace gas fine desulfurization system. The fine desulfurization method comprises the following steps: (1) blast furnace gas enters an organic sulfur conversion device after being sequentially subjected to gravity dust removal and cloth bag dust removal, and organic sulfur in the blast furnace gas is hydrolyzed andconverted into H2S; (II) the blast furnace gas is discharged from the organic sulfur conversion device and then enters a residual pressure power generation device, and pressure energy of the blast furnace gas is used for acting power generation; and (III) the blast furnace gas subjected to residual pressure power generation is introduced into a desulfurization device, and fine desulfurization iscarried out by countercurrent contact with a mixed desulfurization solution formed by a desulfurizing agent and an alkali liquor. The designed blast furnace gas fine desulfurization method can removeCOS and H2S in the coal gas at the same time, removes HCl in a synergistic mode, utilizes a continuous sulfur melting process to achieve recycling of sulfur in the blast furnace coal gas, reduces influences brought by a fine desulfurization process, ensures the quality of the blast furnace coal gas, achieves energy conservation, emission reduction and recycling, and has huge economic benefits andsocial benefits.

Description

technical field [0001] The invention belongs to the technical field of gas desulfurization, and relates to a blast furnace gas fine desulfurization method and a fine desulfurization system. Background technique [0002] Blast furnace gas is the combustible gas with the largest output in iron and steel enterprises, and its statistical output is as high as 70-80 billion cubic meters per month. Existing blast furnace gas purification and follow-up applications mainly use bag-type dust removal to remove particulate matter, and after TRT residual pressure power generation, it is sent to blast furnace hot blast stoves, steel rolling heating furnaces, gas power generation and other user units for use as fuel, but blast furnace gas still contains Harmful substances such as sulfur and chlorine. At present, users such as blast furnace hot blast stoves, steel rolling heating furnaces, and gas power generation require the combustion of tail gas SO 2 Reach ultra-low emission limits, wh...

Claims

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Application Information

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IPC IPC(8): C10K1/02C10K1/00C10K1/08C10K1/12C10K1/20C10K1/22C01B17/027
CPCC01B17/027C10K1/002C10K1/004C10K1/02C10K1/024C10K1/08C10K1/12C10K1/20C10K1/22Y02P20/10Y02P20/129
Inventor 朱廷钰李玉然林玉婷王斌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI