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Blast furnace gas desulfurization process

A technology for blast furnace gas and desulfurization process, which is applied in the petroleum industry, combustible gas purification, removal of gas pollutants, etc., and can solve problems such as reducing the calorific value of gas and corrosion of pipeline equipment

Pending Publication Date: 2021-09-10
ZHONGJING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet desulfurization system used by this equipment will reduce the calorific value of the gas and cause corrosion of subsequent pipeline equipment

Method used

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  • Blast furnace gas desulfurization process
  • Blast furnace gas desulfurization process
  • Blast furnace gas desulfurization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2

[0059] figure 1 It is a structural schematic diagram of the equipment used in Examples 1-2.

[0060] (1) The blast furnace gas after TRT (the parameters of the blast furnace gas after TRT are shown in Table 1) is heated to 80° C. through the heating device 1 to form blast furnace gas to be treated after TRT. The heating device 1 is an air-to-air heat exchanger.

[0061] (2) The blast furnace gas to be treated enters the pretreatment reactor 2 from the bottom of the pretreatment reactor 2 . The pretreatment reactor 2 is a fixed bed reaction tower. The pretreatment reactor 2 is provided with a plurality of pretreatment agent chambers, and the pretreatment chambers are filled with pretreatment agents. The blast furnace gas to be treated entering from the bottom of the pretreatment reactor 2 contacts and reacts with the pretreatment agent from bottom to top, so that the hydrogen chloride and part of H in the blast furnace gas to be treated 2 S and other acid corrosion products...

Embodiment 3

[0067] figure 2 It is a schematic structural diagram of the equipment used in this embodiment. Except step (1) as described below, all the other are the same as embodiment 1.

[0068] (1) The temperature of the blast furnace gas after TRT is 70-100°C to meet the service conditions without going through the heating device 1 to raise the temperature. The blast furnace gas after TRT is the blast furnace gas to be treated after TRT. The detailed parameters of blast furnace flue gas after TRT are shown in Table 1.

[0069] The above equipment has been in continuous operation for more than 3 months, and the outlet is continuously monitored by gas chromatography. The total sulfur concentration at the outlet is stable, and there is no obvious corrosion in the pipeline of subsequent equipment.

[0070] Table 1

[0071]

[0072] Table 2

[0073]

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Abstract

The invention discloses a blast furnace gas desulfurization process. The blast furnace gas desulfurization process comprises the following steps: (1) to-be-treated blast furnace gas passing through a TRT or a pressure regulating valve group passes through a pretreatment reactor to remove acidic corrosives so as to form pretreated gas, wherein a calcium-based absorbent serving as a pretreating agent is arranged in the pretreatment reactor, and the temperature of the blast furnace gas to be treated is 70-120 DEG C; (2) enabling the pretreated coal gas to pass through a hydrolysis tower, and converting organic sulfur into hydrogen sulfide to form hydrolyzed coal gas, wherein an alumina-based hydrolysis catalyst is arranged in the hydrolysis tower; and (3) enabling the hydrolyzed coal gas to pass through a desulfurization reactor to form purified coal gas; wherein the desulfurization reactor is filled with an iron oxide absorbent. According to the process, the desulfurization efficiency can be improved on the premise of reducing equipment corrosion.

Description

technical field [0001] The invention relates to a blast furnace gas desulfurization process. Background technique [0002] Blast furnace gas is a flammable gas produced by iron and steel enterprises in the ironmaking process, and its main components are CO, CO 2 , N 2 、CH 4 and sulfide etc. Sulfides are mainly divided into two types: organic sulfur and inorganic sulfur. The organic sulfur is mainly carbonyl sulfide (COS), and the main components of inorganic sulfur are hydrogen sulfide and sulfur dioxide. The proportion of organic sulfur in blast furnace gas is higher than that of inorganic sulfur. Existing blast furnace gas purification and follow-up applications mainly use bag filters to remove particulate matter, and then send them to user units such as blast furnace hot blast stoves, steel rolling heating furnaces, and gas power generation after TRT (Blast Furnace Gas Residual Pressure Turbine Power Generation Device) residual pressure power generation It is used as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/22C10K1/34C10K1/00
CPCC10K1/004C10K1/003C10K1/22C10K1/34
Inventor 王键张敏孙曼丽
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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