Desulfurization purification method for blast furnace gas

A blast furnace gas and purification furnace technology, which is applied in combustible gas purification, combustible gas purification/transformation, gas dust removal, etc., can solve problems such as excessive SO2 content, and achieve the effects of small pressure loss, pressure reduction, and simple process equipment

Inactive Publication Date: 2019-04-12
武汉禾谷环保有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for blast furnace gas desulfurization and purification aimed at the deficiencies of the prior art, aiming at the higher content of sulfide in the blast furnace gas and the inability of the existing wet scrubbing device behind the TRT device to remove organic sulfur, resulting in its Due to the sho

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  • Desulfurization purification method for blast furnace gas
  • Desulfurization purification method for blast furnace gas
  • Desulfurization purification method for blast furnace gas

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention Inside.

[0027] Such as figure 1 , 2 Shown in and 3, blast furnace gas desulfurization purification method of the present invention comprises the following steps:

[0028] S1. The blast furnace gas enters the organic sulfur conversion device 2 after being dedusted by the dry bag filter device 1 to convert the organic sulfur into H2S;

[0029] S2, then enter the residual pressure turbine power g...

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Abstract

The invention discloses a desulfurization purification method for blast furnace gas. The method comprises the steps that S1, the blast furnace gas is dedusted through a dry-method cloth bag dedustingdevice and then enters an organic sulfur conversion device, and organic sulfur is converted into H2S; S2, H2S enters a blast furnace top gas recovery turbine unit for recycling pressure energy and hotenergy; S3, the cooled blast furnace gas enters a wet-method desulfurization device for removing hydrogen sulfide again and then enters all user units. According to the method, based on the temperature and pressure of the blast furnace gas, organic sulfur conversion is conducted, after the blast furnace gas passes through the blast furnace top gas recovery turbine unit (TRT), the temperature of the blast furnace gas is lowered, H2S removal is conducted, and sulfide in the blast furnace gas is removed. Recycling of pressure energy and hot energy of the blast furnace gas by the blast furnace top gas recovery turbine unit is not influenced.

Description

technical field [0001] The invention relates to the technical field of blast furnace gas purification, in particular to a blast furnace gas desulfurization purification method. Background technique [0002] Blast furnace ironmaking is one of the important processes of modern iron and steel production. The reducing agents used in ironmaking blast furnaces are coke, coal, heavy oil, etc. The reducing agent CO is produced by air blast and provides high-temperature heat. Due to the high nitrogen content in the air, dilute CO in the reducing gas is removed, so the CO content in the blast furnace gas is low and the nitrogen content is high. Typical blast furnace gas contains CO: 24-26%; CO2 14-16%; H2 1-2%; CH4 0.3-0.8%; N2 56-59%. Calorific value: 3200-4000kj / Nm3; In addition, there are H2S, COS, SO2, SO3 and other sulfides in blast furnace gas. [0003] In the past ten years, with the widespread application of blast furnace gas dry bag dust removal + residual pressure turbine ...

Claims

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Application Information

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IPC IPC(8): C10K1/02C10K1/00C10K1/12
CPCC10K1/002C10K1/004C10K1/024C10K1/12
Inventor 张艺馨
Owner 武汉禾谷环保有限公司
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