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Blast furnace gas comprehensive treatment and recovery method

A technology of comprehensive treatment and recovery method, which is applied in the field of comprehensive treatment and recovery of blast furnace gas, which can solve the problems of direct air discharge and large gas release without a good treatment method, and achieve the effects of reducing corrosion, reducing floor space, and reducing air pollution

Inactive Publication Date: 2019-01-04
MCC CAPITAL ENGINEERING & RESEARCH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

From the above analysis, it can be known that the existing technology has no good treatment method for the large gas release, and they all discharge it directly to the air; for the blast furnace roof pressure equalization gas, although the existing technology has provided many recovery methods, they all need to add additional dedicated The pressure equalizing gas dust removal equipment is facing the important problem of floor area and additional equipment investment in the transformation process
As an alkali spraying tower for eliminating the acidic medium in the gas, it only has the single function of spraying alkali and removing acid

Method used

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  • Blast furnace gas comprehensive treatment and recovery method
  • Blast furnace gas comprehensive treatment and recovery method
  • Blast furnace gas comprehensive treatment and recovery method

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0031] A method for comprehensive treatment and recovery of blast furnace gas, comprising the following steps:

[0032] Step 1. The large diffused gas produced by the blast furnace enters the alkali-spraying scrubber 13 through the diffused gas recovery pipeline, the pressure-equalizing gas produced by the blast furnace enters the alkali-spraying scrubber 13 through the pressure-equalizing gas recovery pipeline, and the furnace top gas produced by the blast furnace passes through the furnace top gas The recovery pipeline enters the alkali-spraying scrubber 13, and the large diffused gas, pressure-equalizing gas and furnace top gas form a mixed gas in the alkali-spraying scrubber 13;

[0033] S...

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Abstract

The invention discloses a blast furnace gas comprehensive treatment and recovery method. The method comprises the following steps: step 1, ensuring that highly discharged gas produced by a blast furnace enters an alkali spraying washing tower (13) through a discharged gas recovery pipeline, ensuring that pressure equalizing gas produced by the blast furnace enters the alkali spraying washing tower(13) through a pressure equalizing gas recovery pipeline, ensuring that furnace top gas produced by the blast furnace enters the alkali spraying washing tower (13) through a furnace top gas recoverypipeline, and ensuring that the highly discharged gas, the pressure equalizing gas and the furnace top gas form mixed gas in the alkali spraying washing tower (13); step 2, ensuring that the mixed gasflow is uniform; step 3, spraying alkali liquor to the mixed gas; step 4, clearing entrainment in the mixed gas; step 5, removing water vapor in the mixed gas. The method can realize alkali sprayingacid deacidification treatment on the furnace top gas, scrubbing dust collection treatment and recovery on the pressure equalizing gas, and dust collection deacidification treatment on the highly discharged gas.

Description

technical field [0001] The invention relates to the field of iron and steel smelting equipment, in particular to a method for comprehensive treatment and recovery of blast furnace gas. Background technique [0002] The long-term discharge of gas accompanying the normal production of blast furnace ironmaking includes two parts: one part is the gas discharged from the material tank when charging the top of the furnace, called equal pressure gas, and the other part is the gas discharged from the top of the furnace due to the chemical reaction of raw materials and fuels in the blast furnace. It is called top gas. When the blast furnace suspends production and stops the air supply due to special reasons, the gas discharged from the top of the furnace is called large gas release. [0003] The top pressure equalizing gas necessary for blast furnace production is released into the atmosphere after passing through the cyclone dust collector and silencer before each charging (about 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/22C21B5/06
CPCC21B5/06C21B7/002C21B7/22Y02P10/25
Inventor 苗胜田王得刚罗思红段国建陈秀娟
Owner MCC CAPITAL ENGINEERING & RESEARCH
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