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Blast furnace gas bypass desulfurization method and device

A blast furnace gas and desulfurization device technology, which is applied in gas dust removal, combustible gas purification, gas pollutant removal and other directions, can solve problems such as the inability to meet ultra-low emission index requirements, and achieve good environmental benefits, economic benefits, and practicability strong effect

Inactive Publication Date: 2021-03-19
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no corresponding desulfurization equipment for the flue gas of hot blast stoves and heating furnaces in iron and steel enterprises, the concentration of sulfur dioxide emitted by hot blast stoves and heating furnaces is generally greater than 100mg / m 3 , unable to meet the requirements of ultra-low emission indicators

Method used

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  • Blast furnace gas bypass desulfurization method and device
  • Blast furnace gas bypass desulfurization method and device
  • Blast furnace gas bypass desulfurization method and device

Examples

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Embodiment 1

[0029] Such as figure 1 As shown, a blast furnace gas bypass desulfurization device includes a coarse dust collector 1, a fine dust collector 2, a hydrolysis catalytic tower 3 and a desulfurization tower 4, a rough dust collector 1, a fine dust collector 2, a hydrolysis catalytic tower 3 and a desulfurization tower 4 They are connected sequentially along the flow direction of the gas path.

Embodiment 2

[0031] Such as figure 1 As shown, the present embodiment is a further improvement on the basis of embodiment 1, specifically as follows:

[0032] The hydrolysis catalyst used in the hydrolysis catalytic tower 3 is γ-Al 2 o 3 or TiO 2 or ZrO 2 As a carrier, alkali metal K 2 O is the active ingredient.

Embodiment 3

[0034] Such as figure 1 As shown, the present embodiment is a further improvement on the basis of embodiment 2, specifically as follows:

[0035] There are multiple supporting layers in the hydrolysis catalytic tower 3, on which the hydrolysis catalyst is placed, and the pressure drop of the filled bed layer is lower than 700 Pa. In addition, manholes are arranged on the hydrolysis catalytic tower 3.

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Abstract

The invention relates to a blast furnace gas bypass desulfurization device, which comprises a coarse dust remover, a fine dust remover, a hydrolysis catalysis tower and a desulfurization tower, wherein the coarse dust remover, the fine dust remover, the hydrolysis catalysis tower and the desulfurization tower are sequentially communicated along the flowing direction of a gas path. The desulfurization method comprises the steps that blast furnace gas is fed into the coarse dust remover for coarse dust removal; the blast furnace gas discharged from the coarse dust remover enters the fine dust remover for fine dust removal; the blast furnace gas discharged from the fine dust remover enters the hydrolysis catalysis tower for hydrolysis catalysis so as to convert COS into H2S; and the blast furnace gas discharged from the hydrolysis catalytic tower enters the desulfurization tower to be desulfurized. The problem that SO2 after gas combustion cannot meet the environmental protection requirement due to high total sulfur caused by organic sulfur COS, inorganic sulfur H2S and the like in blast furnace gas is solved; and carbonyl sulfide (COS) in the blast furnace gas is efficiently converted into inorganic sulfur (H2S) through hydrolysis by utilizing the characteristics, residual pressure and temperature of the blast furnace gas, and the total sulfide removal rate reaches 90% or above.

Description

technical field [0001] The invention relates to the technical field of blast furnace gas desulfurization and purification treatment, in particular to a blast furnace gas bypass desulfurization method and device. Background technique [0002] Blast furnace gas purification plays an important role in ironmaking production, and the gas produced per ton of pig iron is 1600-2000m 3 / h is an important secondary energy source for steel plants. Blast furnace gas contains H 2 、CH 4 , CO, CO 2 , N 2 , O 2 and a small amount of sulfide (H 2 S, COS, etc.). Blast furnace gas is often used alone as fuel for hot blast stoves, coke ovens and boilers after dedusting, and can also be combined with coke oven gas to form a calorific value of 1100kcal / Nm 3 ~2000kcal / Nm 3 The mixed gas is used as fuel for soaking furnaces, heating furnaces, heat treatment furnaces, etc., and is used for ignition of sintering machines. With the iron and steel industry's "Opinions on Promoting the Impleme...

Claims

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Application Information

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IPC IPC(8): C10K1/02C10K1/34C10K1/00C10K1/32
CPCC10K1/02C10K1/34C10K1/004C10K1/32
Inventor 杜健敏周萍李富智彭建清付本全卢丽君吕军陆婷
Owner 武汉钢铁有限公司
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