Converter smoke radiation type waste heat boiler recovery system

Abstract

The invention discloses a converter smoke radiation type waste heat boiler recovery system, comprising a three-way valve, a settling chamber, a water-spraying cooling device, a radiation type waste hat boiler and a heat accumulator. When oxygen content of smoke reaches the standard, the three-way valve opens a gate communicated with the settling chamber, high temperature smoke after being subjected to dust removal by virtue of the settling chamber is fed into the radiation type waste heat boiler, heat exchange is carried out by virtue of a smoke flow equalizing chamber, a water-cooling radiation heat exchange chamber, an intermediate settling chamber of a boiler and a convection heat exchange chamber, dust content and temperature of the smoke are greatly reduced, then the smoke is fed into a dust remover to remove dust and then is recovered; when the oxygen content of the smoke exceeds standard, the high-temperature smoke is directly subjected to water spraying and cooling by virtue of the water-spraying cooling device, the smoke is fed into the dust remover to remove dust and then is directly discharged. Clearance type steam generated by the waste heat boiler enters into the heat accumulator to be subjected to pressure stabilization, so as to be changed into continuous steam, and the continuous steam is applicable to production and power generation. The converter smoke radiation type waste heat boiler recovery system disclosed by the invention can fully recover heat of converter smoke, the recovered steam quantity is increased by more than 25%, dust removal water consumption is greatly reduced, and the system disclosed by the invention can run stably and reliably.

Description

technical field [0001] The invention relates to a converter flue gas radiant waste heat boiler recovery system, specifically, it can efficiently recover the heat of high-temperature flue gas discharged from the converter, reduce the exhaust gas temperature to the greatest extent, ensure the safe operation of dust removal equipment, and reduce the power consumption of dust removal. The invention belongs to the technical field of energy saving and environmental protection produced by a converter. Background technique [0002] In the process of converter steelmaking, the exhausted flue gas contains a large amount of CO. There are two ways to deal with this flue gas: (1) Use the unburned method to recover the flue gas containing CO and use it as fuel. The maximum temperature of the flue gas from the converter is about 1800°C; 2. Use the combustion method to feed excess air to burn the GO, and then discharge it through dust removal. The exhaust gas temperature of this method can ...

AI Technical Summary

Problems solved by technology

The second method, due to the loss of fuel, is not currently used in large-scale converter processes

The disadvantages of this method are: (1), the vaporization flue only recovers heat above 800-1000°C, wasting the waste heat in the flue gas at 800-1000°C; (2), it increases water consumption

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