Coal-gas recovering process and device of charging, equalizing and bleeding of blast furnace

Abstract

The invention relates to coal-gas recovering process and device of charging, equalizing and bleeding of a blast furnace. The coal-gas recovering process comprises the following steps that: crude gas equalized and bled from a discharge tank of a blast furnace charging system enters into a furnace top coal gas noise reduction cyclone dust remover via a bleeding pipe; a cut off valve arranged at the furnace top coal noise reduction cyclone dust remover is closed, and a half-cleaned coal gas cut off valve is opened; half-cleaned coal gas formed by the primary dust removal of the crude coal gas via the furnace top coal gas noise reduction cyclone dust remover enters into a bag dust remover via a pipeline and the half-cleaned coal cut off valve; cleaned coal gas dedusted by the bag dust remover enters into a coal gas pipe network, and dust collected by the bag dust remover is conveyed to a dust recovering system for reutilization via a dust discharge outlet, a dust discharge valve and a dust delivery pipeline. The invention has the advantages of simple recovering process and device and easy operation; with the process, not only harmful gas during charging, equalizing and bleeding can be effectively recovered, but also emission of greenhouse gases is reduced; and the invention has significant economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of blast furnace gas discharge, and in particular relates to a gas recovery process and a device for blast furnace charging and equalizing pressure release process. Background technique [0002] In the process of blast furnace production, sinter, natural fast ore, miscellaneous ore and coke must be continuously loaded into the blast furnace, and the blast furnace is a high-temperature and high-pressure vessel. Conversion system, this conversion system is realized by the opening of the large and small material bells on the furnace top or the upper and lower sealing valve switches in the upper and lower material tanks on the furnace roof without material bells through the interlocking electric control and programming system of the feeding system. The working system of the lower hopper and the lower material tank is to pressurize the lower hopper of the lower material tank to the pressure equal to the pressure ...

AI Technical Summary

Problems solved by technology

So far, there is no specific process technology for recovering the gas during the pressure equalization and release process of the blast furnace charging system in the world. The recovery of this release gas has the dual functions of energy recovery and reduction of environmental pollution. It is also the energy saving of blast furnace iron workers. A major innovation topic for emission reduction

Images