System for recovering converter gas sensible heat

Abstract

The invention relates to a system for recovering converter gas sensible heat, which comprises a waste heat boiler, a water-sealed ash discharging device and a vibration ash cleaning device, wherein the upper part and the lower part of the waste heat boiler are respectively provided with a converter gas inlet and a converter gas outlet, and the converter gas inlet is connected with a converter gaspipeline; the four walls of the waste heat boiler are curtain outer membrane type walls which are vertically arranged; the waste heat boiler is internally provided with vertical curtain inner membrane type walls which divide the interior of the waste heat boiler into separate small spaces; the vibration ash cleaning device is arranged at the outer side of an upper collecting box; the water-sealedash discharging device is arranged at the bottom of the waste heat boiler, and the bottom of the waste heat boiler is submerged in a water seal tank; and the converter gas pipeline is provided with agas detector and a three-way diverter valve which is arranged between the gas detector and the converter gas inlet. The invention can effectively recover the converter gas sensible heat ranging from 200 DEG C to 1000 DEG C, thereby having obvious energy-saving effect; and the membrane type wall structure and the water-sealed ash discharging device can effectively seal and prevent air from entering into a hearth, thereby having the explosion-proof function.

Description

technical field [0001] The invention relates to a converter gas sensible heat recovery system, which belongs to the technical field of waste heat utilization. Background technique [0002] Steelmaking converter gas contains a large amount of CO, and the dust content is as high as 80-120g / Nm 3 . Therefore, the recovery and utilization of converter gas is mainly to remove dust and recover CO. At present, there are mainly two recycling methods: wet recycling (OG method) and dry recycling (LT method). Wet recovery mainly uses spraying, washing and cooling to reduce the temperature of the converter gas to about 200°C and then enters the dust collector for dust removal. The principle of dry recovery is that the high-temperature dusty flue gas enters the evaporative cooler through the cooling flue, and the temperature drops to about 210°C, and then enters the electrostatic precipitator for dust removal. Although the OG method and the LT method have different dust removal method...

AI Technical Summary

Problems solved by technology

Therefore, a large amount of sensible heat in the converter gas has not been utilized

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