Environment-friendly blowing-down and blowing-in method for blast furnace

Abstract

The invention discloses an environment-friendly blowing-down and blowing-in method for a blast furnace, and relates to the technical field of blast furnace environment-friendly processes in the ferrous metallurgy industry. The environment-friendly blowing-down and blowing-in method for the blast furnace aims at solving the problems that newly-added gas purification equipment of the blast furnace is high in difficulty, the environment and the physical health of residents are influenced if purification does not conducted, the method comprises the following steps that S1, transformation is conducted, specifically, a connecting pipe is additionally arranged, one end of the connecting pipe communicates with an ascending pipe of a blast furnace gas furnace body, the other end of the connecting pipe communicates with a gas inlet of a cyclone dust collector, and a valve is installed on the connecting pipe; and S2, dust removal is conducted, specifically, when the blast furnace blowing-down andblowing-in is conducted, the valve and the cyclone dust collector are opened, coal gas is enabled to enter the cyclone dust collector from the connecting pipe for dust removal, and then the coal gasis diffused and emptied. According to the environment-friendly blowing-down and blowing-in method, new equipment does not need, the process is simple, investment is less, the dust removal effect is good, blast furnace regular inspection environment-friendly blowing-down and blowing-in is achieved, the phenomenon that a large amount of dense smoke is directly emptied in the blowing-down and blowing-in process is avoided, procedure dense smoke emission pollution is reduced, and the new requirement of residents around an iron and steel enterprise for good life is met.

Description

technical field [0001] The invention relates to the technical field of blast furnace environmental protection technology in the iron and steel metallurgy industry, in particular to a blast furnace environmental protection shutdown air supply method. Background technique [0002] The blast furnace is a continuous production high-temperature and high-pressure smelting equipment, and the cost of shutting down the furnace and putting it into production is extremely high. Therefore, the operation and maintenance of the blast furnace equipment is carried out through regular inspections 3-5 times a year, and each time the wind is shut down for about 24 hours. During the process of shutting down and supplying air for each regular inspection, some of the black waste gas with flames should be discharged directly through the large diffuser on the furnace top according to the process requirements; blast furnaces are generally the tallest buildings in iron and steel enterprises, and there...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a blast furnace environment-friendly air supply method to solve the problem that it is difficult to add gas purification equipment to the blast furnace, but without purification it will affect the environment and the health of residents

Images