Pressure-equalizing and bleeding method for injecting furnace roof tank coal gas by using high-pressure gas

Abstract

The invention discloses a pressure-equalizing and bleeding method for injecting furnace roof tank coal gas by using high-pressure gas, which comprises the following steps: when pressure equalization is performed at the roof of a blast furnace, if primary pressure equalization can not meet the requirements, further opening a secondary pressurization valve, and performing secondary pressure equalization on a weighing tank with nitrogen gas; when bleeding is performed at the roof of the blast furnace, opening a pressure-equalizing and bleeding valve, a bag-type dust remover valve and a natural recovery valve; performing preliminary dust removal on coal gas in the weighing tank with a cyclone dust remover, and then performing fine dust removal with a bag-type dust remover; when the pressure of the coal gas in the weighing tank is lowered to a preset value, closing the natural recovery valve, opening a forced recovery valve and a working gas valve, and introducing high-pressure cleaning gas into an injector; and under the injection effect of the high-pressure cleaning gas, enabling the remaining coal gas in the weighing tank to quickly move into a clean coal gas pipe network, thus realizing the bleeding and recovery of the coal gas in the weighing tank. By introducing the facilities such as the bag-type dust remover, the injector and the like, the invention can prevent the pressure-equalized coal gas from being directly exhausted to the atmosphere, thereby reducing environmental pollution and waste of resources.

Description

technical field [0001] The invention relates to the technical field of the iron and steel industry, in particular to a method for equalizing and releasing gas from a furnace top material tank by injecting high-pressure gas. Background technique [0002] The increasingly stringent environmental protection requirements and market situation in the steel industry require steel companies to save energy, reduce emissions, and reduce costs. At present, the blast furnace ironmaking process pollution emissions account for the majority of the entire iron and steel industry emissions, therefore, it is particularly necessary to reduce the ironmaking process emissions. [0003] At present, the traditional pressure equalization and release of blast furnace charging is to use semi-clean gas and nitrogen to equalize the pressure of the material tank to the pressure of the blast furnace top to realize the discharge into the blast furnace. When releasing, the raw gas in the material tank is p...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-pressure gas induction system that can not only reduce environmental pollution, but also recover a large amount of gas resources, aiming at the defect that the pressure-equalizing and releasing gas is directly released into the air and pollutes the environment in the prior art. Method of Equalizing and Dispersing Coal Gas in Furnace Top Material Tank

Images