A Coal Gas Treatment Method for Eliminating Black Smoke from Blast Furnace Top

Abstract

The invention discloses a gas treatment method for eliminating black smoke from the top of a blast furnace. In the method, without adding any equipment, by changing the operation procedure of the gas treatment, the existing dry dust removal gas purification system is used to solve the problem of blast furnace shutdown. The problem of black smoke from the furnace top during the wind and rewind process. Specifically, in the process of shutting down and revitalizing the blast furnace, when the furnace is still under positive pressure, the gas is not opened on the top of the furnace, but the gas is introduced into the bag dust removal box, and the dust removal function of the bag is used to remove the dust from the gas. Afterwards, the clean gas is discharged from the release pipe of the bag filter, thereby completely eliminating the phenomenon of black smoke from the top of the furnace during shutdown and rewinding.

Description

technical field [0001] The invention relates to a method for shutting down and restoring air of a blast furnace, in particular to a gas treatment method for eliminating black smoke from the top of a blast furnace during the process of shutting down and restoring wind of a blast furnace. Background technique [0002] Shutdown and revival of blast furnace is a blast furnace operation method in which blast furnace production is temporarily stopped and then resumed. The basic operation of stopping production and resuming production of blast furnace is to stop the air supply to the furnace and resume the air supply to the furnace. During the normal operation of the blast furnace, a large amount of black smoke will be released from the top of the furnace during the shutdown and recovery process, which will cause serious pollution to the environment. The main reason for the black smoke: the pressure inside the blast furnace is about 420KPa during normal production, and the pressur...

AI Technical Summary

Problems solved by technology

For example, the utility model patent "A Blast Furnace Top Gas Purification and Discharge Device" with application number 2017201780512 can solve the problem of black smoke from the furnace top, but it needs to add a gas purification discharge device (second dust collector). The second dust collector is installed on the ground, because the pipeline is too long, it is difficult to guide the gas, and the expected effect cannot be achieved

If the second dust collector is installed on the furnace roof, it is difficult to find a suitable position due to the high position of the furnace roof and the small space, and if the dust accumulation of the second dust collector is not handled properly, it will become another source of pollution

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