Device for recovering furnace top even pressure diffusion coal gas of blast furnace

Abstract

The invention discloses a device for recovering furnace top even pressure diffusion coal gas of a blast furnace and belongs to the technical field of blast furnace ironmaking. The device comprises a furnace top material tank, a cyclone dust collector, a muffler, a gas beam push shot gun, a bag-type dust collector, a high pressure nitrogen tank, a primary even coal gas pipeline and a clean coal gaspipe network. When coal gas is recovered, a coal gas recovery and bypass valve is opened, and furnace top even pressure coal gas passes through the cyclone dust collector, the gas beam push shot gunand the bag-type dust collector and then merges into the clean coal gas pipe network. When pressure of the furnace top material tank is lowered to a certain value, a push shot gas valve is opened, thegas beam push shot gun starts to work, the furnace top even pressure coal gas is subjected to the push shot of primary even coal gas, residual low pressure coal gas in the furnace top material tank is conveyed into the bag-type dust collector, is subjected to secondary dust removal and merges into the clean coal gas pipe network, and thus the even pressure diffusion coal gas of the furnace top material tank is recovered. The device for recovering the furnace top even pressure diffusion coal gas has the advantages that the furnace top even pressure diffusion coal gas is recovered overall, theprocess is simple, recovery time is short, and energy saving, environmental protection and low carbon requirements of the iron and steel industry of our country are met.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a device for recovering blast furnace roof equalizing and releasing gas. Background technique [0002] During the production process of the blast furnace, the charging equipment on the top of the furnace periodically receives, equalizes, discharges, and releases the gas at the top of the blast furnace. Up to 15 cycles, the instantaneous processing air volume is large, reaching 10-15Nm 3 / s, short duration, loud noise. [0003] At present, blast furnace gas is equalized and diffused by using clean gas for primary pressure equalization and nitrogen gas for secondary pressure equalization. During the release, raw coal gas containing dust passes through a cyclone dust collector and is directly released into the air after the silencer. The emission of raw gas is about 8-10Nm 3 / tFe, the amount of dust is 300-400g / tFe. Although the dust has been removed...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a device for recovering blast furnace roof pressure equalization and release of gas, which solves the problems of difficult recycling of blast furnace top pressure equalization and release of gas, and direct release causes environmental pollution and waste of resources

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