Waste heat recovery equipment and waste heat recovery method in the low temperature section of converter primary flue gas

Abstract

The invention relates to waste heat recovery equipment in the low-temperature section of the primary flue gas of a converter, which includes an adiabatic flue, one end of the adiabatic flue is connected to a converter gasification cooling flue, the other end is connected to a section of an evaporator, and the section of the evaporator is connected to an atomization cooling venturi tube , the atomizing cooling venturi tube is connected to the second stage of the evaporator, the second stage of the evaporator is connected to the economizer, and the economizer is connected to the inertia force dust removal device; after the hot water in the economizer enters the first stage of the evaporator and the second stage of the evaporator, it is The flue gas with heat inside it is heated to generate saturated water vapor; the atomization cooling venturi is equipped with a double-medium spray gun. The invention also relates to a waste heat recovery method of the waste heat recovery equipment in the low-temperature section of the primary flue gas of the converter. The flue gas exchanges heat with the atomized liquid droplets sprayed from the dual-medium spray gun inside the atomizing cooling venturi tube. The local accumulation of carbon monoxide in the medium avoids the danger of flash explosion, making the equipment safer to use.

Description

technical field [0001] The invention relates to waste heat recovery equipment and a waste heat recovery method in the low-temperature section of primary flue gas of a converter. Background technique [0002] Since the primary flue gas temperature at the outlet of the converter waste heat boiler tail flue in the existing process is still about 900°C, no matter whether it is wet or dry purification and recovery process, this part of the heat is not recovered, resulting in part of the heat loss and no recovery. The reason is to worry about the safety of waste heat recovery. [0003] However, the recovery of waste heat and energy will effectively reduce the production cost of steel products, so it is necessary to recycle this part of the heat under the premise of solving safety problems. [0004] Therefore, it is necessary to design a waste heat recovery equipment and waste heat recovery method in the low-temperature section of the primary flue gas of the converter to overcome ...

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Problems solved by technology

[0002] Since the primary flue gas temperature at the outlet of the converter waste heat boiler tail flue in the existing process is still about 900°C, no matter whether it is wet or dry purification and recovery process, this part of the heat is not recovered, resulting in part of the heat loss and no recovery. The reason is concern about the safety of waste heat recovery

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