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A method and system for deoxidizing and desulfurizing blast furnace gas

A blast furnace gas and desulfurization system technology, applied in combustible gas purification, removal of gas pollutants, combustible gas purification/transformation, etc., can solve problems such as large temperature fluctuations, poisoning of hydrolyzing agents, affecting desulfurization process and desulfurization effect, etc. , to achieve the effect of prolonging the service life and stabilizing the temperature

Active Publication Date: 2021-09-28
中琉科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is that the existing blast furnace gas desulfurization process directly hydrolyzes the blast furnace gas, which is likely to cause poisoning of the hydrolyzing agent, thereby affecting the desulfurization process and desulfurization effect. , the temperature of blast furnace gas fluctuates greatly in the process of deoxidation, hydrolysis, and adsorption treatment, which in turn affects the defects of the performance of deoxidizers, hydrolysis agents, and adsorbents, thereby providing a method and system for deoxidation and desulfurization of blast furnace gas

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  • A method and system for deoxidizing and desulfurizing blast furnace gas

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Embodiment 1

[0050] Such as figure 1 As shown, the present invention provides a blast furnace gas deoxidation and desulfurization system, comprising:

[0051] Deoxygenation device 1 has a deoxygenation inlet 9 and a deoxygenation outlet 10,

[0052] The residual pressure turbine power generation device 2 has a power generation raw material inlet 11 and a power generation gas outlet 12, the power generation raw material inlet 11 of the residual pressure turbine power generation device 2 is connected to the deoxygenation gas outlet 10 of the deoxidation device 1,

[0053] The hydrolysis device 3 has a hydrolysis gas inlet 13 and a hydrolysis gas outlet 14, the power generation gas outlet 12 of the residual pressure turbine power generation device 2 is connected with the hydrolysis gas inlet 13 of the hydrolysis device 3,

[0054] The first heat exchange device 4 and the second heat exchange device 5 arranged in series, the heat exchange air inlet 15 of the first heat exchange device 4 is co...

Embodiment 2

[0089] This embodiment provides a method for deoxidizing and desulfurizing blast furnace gas, comprising the following steps:

[0090] 1) Blast furnace gas at 140°C (in which the content of COS is 220mg / m 3 , the volume content of oxygen is 1.2%) with 500h -1 The space velocity passes through the first heat exchange zone and the second heat exchange zone in the deoxidation device 1 (deoxidation tower) successively, and deoxidation is carried out in the deoxidation zone (wherein the deoxidation zone in the deoxidation device 1 is filled with honeycomb ceramic carrier supporting platinum metal Deoxidizer) to obtain deoxidized raw material gas (the temperature of the deoxidized raw material gas is 165 ° C, and the volume content of oxygen in the deoxidized raw material gas is 7 ppm);

[0091] 2) Feed the raw material gas after deoxidation treatment into the residual pressure turbine power generation unit 2 (TRT) to generate electricity, and simultaneously lower the temperature o...

Embodiment 3

[0096] This embodiment provides a method for deoxidizing and desulfurizing blast furnace gas, comprising the following steps:

[0097] 1) Blast furnace gas at 130°C (with a COS content of 250mg / m 3 , the volume content of oxygen is 1.0%) in 500h -1 The space velocity passes through the first heat exchange zone and the second heat exchange zone in the deoxidation device 1 (deoxidation tower) successively, and deoxidation is carried out in the deoxidation zone (wherein the deoxidation zone in the deoxidation device 1 is filled with honeycomb ceramic carrier loaded palladium platinum double metal deoxidizer) to obtain the raw material gas after deoxidation treatment (the temperature of the raw material gas after the deoxidation treatment is 140°C, and the volume content of oxygen in the raw material gas after the deoxidation treatment is 2ppm);

[0098] 2) Feed the raw material gas after deoxidation treatment into the residual pressure turbine power generation unit 2 (TRT) to ge...

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Abstract

The invention belongs to the field of air purification and environmental protection, and in particular relates to a blast furnace gas deoxidation and desulfurization method and system. The blast furnace gas deoxidation and desulfurization method provided by the present invention comprises the following steps: performing deoxidation treatment on the blast furnace gas, performing the first cooling treatment on the raw material gas after the deoxidation treatment, and performing the first cooling treatment on the raw material gas after the first cooling treatment under the action of a hydrolyzing agent. In the hydrolysis treatment, the raw material gas after the hydrolysis treatment is subjected to the first heating treatment, and the raw material gas after the first heating treatment is subjected to the adsorption treatment of the adsorbent to obtain the deoxidized and desulfurized blast furnace gas. The blast furnace gas deoxygenation and desulfurization method provided by the present invention effectively solves the defect that the existing blast furnace gas desulfurization process directly hydrolyzes the blast furnace gas and easily causes hydrolysis agent poisoning, thereby affecting the desulfurization process and desulfurization effect, and greatly prolongs the service life of the hydrolysis agent .

Description

technical field [0001] The invention belongs to the field of air purification and environmental protection, and in particular relates to a blast furnace gas deoxidation and desulfurization method and system. Background technique [0002] Blast furnace gas is produced during the ironmaking process in steel plants, and contains about 25-30% carbon monoxide, 0.8-1.9% hydrogen, 0.4-0.8% methane and other flammable gases, and 0.6-1.8% oxygen. In addition, blast furnace gas also contains COS, H 2 S and other sulfides, the total sulfur concentration generally reaches 200mgS / Nm 3 Among them, organic sulfur COS accounts for more than 90%. If these sulfides are not restricted, they will be SO 2 The form is discharged into the air, which in turn causes a large amount of acid rain to form. With the increase of people's awareness of environmental protection, the emission limit of sulfur has become increasingly strict, and each terminal using blast furnace gas has established a huge fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10K1/32C10K1/20C10K1/00
CPCC10K1/002C10K1/004C10K1/20C10K1/32
Inventor 刘时球肖益鸿曹彦宁郑勇梁诗景江莉龙
Owner 中琉科技有限公司
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