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Blast furnace gas enrichment apparatus and method

A blast furnace gas and gasification device technology, which is applied in the blast furnace gas field, can solve the problems of limited processing capacity, large floor space, large pressure swing adsorption investment, etc., and achieve the effects of reducing direct release, reducing emissions and avoiding waste.

Active Publication Date: 2012-03-28
SHOUGANG CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pressure swing adsorption has a large investment, a large area, and limited processing capacity.
Therefore, there have been no relevant reports on practical applications

Method used

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  • Blast furnace gas enrichment apparatus and method
  • Blast furnace gas enrichment apparatus and method

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Embodiment Construction

[0019] The blast furnace gas enrichment process described in the present invention is a brand-new design for blast furnace gas enrichment with low calorific value and high carbon dioxide content. Its main process principle is how to effectively reduce CO in the gas. 2 , and increase the CO in the gas, so as to increase the calorific value of the gas and propose a scheme. Its principle is: through the high-temperature gas obtained from the pretreatment of blast furnace gas and the preheated coal, the reduction reaction CO 2 +C=2CO,H 2 O+C→H 2 +CO,2H 2 O+C→CO 2 +2H 2 to reduce CO 2 Content, increase CO, H 2 content, to obtain high calorific value gas.

[0020] The dedusted blast furnace gas 1 is preheated in the heat exchanger 2 by using the high-temperature and high-calorific-value gas 24 after the reaction, and the preheated gas 3 enters the gas heating furnace 4 to use the heat released by the combustion reaction of the high-calorific-value gas 22 and oxygen 7 The pre...

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Abstract

A blast furnace gas enrichment apparatus and a method belong to the technical field of blast furnace gas. The apparatus comprise a feeder, a coal briquette preheater, a distributor, a heat exchanger, a gas-heating furnace, a gas bustle pipe, gas spray guns, a shunt, an ash tray, a gas enrichment furnace, a deduster, a gas storage tank, an oxygen pipeline and a gas outlet pipeline. Blast furnace gas is adopted as material, gas is adopted as energy, oxygen is adopted as oxidizer, and non-coking coal, nut coke and the like are adopted as reducers; after nitrogen is removed from the blast furnacegas and the blast furnace gas passes through a preheater and is enriched, the gas carries out heat exchange, and enters a gas heater, the gas heater utilizes the high-heat value gas to burn with oxygen to provide heat for the blast furnace gas, so that the temperature of the blast furnace gas reaches 800 DEG C to 900 DEG C, the blast furnace gas is blown into the furnace from around the furnace wall, coal briquettes are packed in the gas enrichment furnace, the main reduction task is fulfilled in the coal briquette-packed bed, and thereby high-heat value gas is produced. The invention has theadvantages that: the heat value of the blast furnace gas is increased, and the emission of carbon dioxide is reduced.

Description

technical field [0001] The invention belongs to the technical field of blast furnace gas, and in particular provides a blast furnace gas enrichment device and method. The gas enrichment furnace, the core equipment of the method, is improved on the basis of a single-stage gas generator, which realizes the improvement of the calorific value of the blast furnace gas and the reduction of carbon dioxide emissions. Background technique [0002] A large amount of blast furnace gas will be produced in the smelting process of iron and steel enterprises, but the low calorific value of blast furnace gas and its decreasing trend is the most important reason for restricting the use of blast furnace gas. [0003] The main components of blast furnace gas are CO, CO 2 , N 2 and a small amount of H 2 . At present, most domestic steel mills are facing the problem of unbalanced gas. The blast furnace gas has a high emission rate, and the coke oven gas is generally insufficient. This makes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/60C10J3/20C10J3/84C10J3/72C10J3/30
Inventor 孙健马泽军刘文运周继良张殿伟马丽张勇张雪松
Owner SHOUGANG CORPORATION
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