Process for recovery of excess energy of flue gas from converter

Abstract

The invention relates to gas residual energy recovery area of steelmaking converter, comprising eliminating dust for high-temperature gas generated in steelmaking converter, decreasing the temperature of recovery steam by heat exchanging, and collecting gas; characterized in that in not-blowing period of steelmaking converter, converter gas collected is returned to combustor between hood and vaporizing cooling flue and is mixed with air to burn; high temperature gas with more than 1500DEG C generated in vaporizing cooling flue can ensure steam recovery enough and continuously and control oxygen content in gas equal to or less than 1% after burning. The merit is that oxygen content of gas in flue is used in the process that burning decreases the gap of converter effectively, meanwhile residual energy recovery is continued, the safety and recovery efficiency of residual energy are improved greatly and the service life of equipment is prolonged. It is the effective method for decreasing steelmaking energy consumption.

Description

technical field [0001] The invention relates to the field of recovery of residual energy from flue gas of a steelmaking converter. Background technique [0002] When the steelmaking converter is in production, its specific steelmaking process makes it produce high-temperature flue gas intermittently. Therefore, although there is a certain recovery of the high-temperature energy contained in the high-temperature flue gas produced by it in the world , such as the process and method of reducing the temperature in the flue gas from 1400-1650 ° C to 800-1000 ° C through vaporization cooling heat exchange, but because the high-temperature flue gas generated is intermittent, waste heat recovery is limited and intermittent production Makes it difficult to use steam efficiently. In addition, because the main components of high-temperature flue gas are carbon monoxide, carbon dioxide, some nitrogen and oxygen, and a large amount of dust, etc., gas explosions are likely to occur if no...

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Problems solved by technology

[0002] When the steelmaking converter is in production, its specific steelmaking process makes it produce high-temperature flue gas intermittently. Therefore, although there is a certain recovery of the high-temperature energy contained in the high-temperature flue gas produced by it in the world , such as the process and method of reducing the temperature in the flue gas from 1400-1650 ° C to 800-1000 ° C through vaporization cooling heat exchange, but because the high-temperature flue gas generated is intermittent, waste heat recovery is limited and intermittent production Makes steam difficult to use efficiently

In addition, because the main components of high-temperature flue gas are carbon monoxide, carbon dioxide, some nitrogen and oxygen, and a large amount of dust, etc., in the gap production process, it is very easy to cause a gas explosion if it is not handled properly.

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