The Method of Quickly Introducing Coal Gas After the Blast Furnace Overhaul and Putting into Production

Abstract

The invention relates to a method for rapid introduction of gas after a blast furnace is overhauled, medium-repaired and put into production and belongs to the technical field of blast furnace iron making production. The method for rapid introduction of gas after the blast furnace is overhauled, medium-repaired and put into production comprises the following steps that gas discharging devices areinstalled on clean gas branch pipes before all box body clean gas butterfly valves are dry-dedusted; before the blast furnace is put into production, blast furnace gas is introduced to positions of the dry-dedusted box body clean gas branch pipes from a blast furnace gaspipe network; after ignition and blow-in are conducted in the blast furnace, the air amount is increased gradually, and when theair amount and the furnace top temperature reach target values, gas is started to be introduced in; and blast furnace gas passes through a gravity dust collector and gas dedusting box bodies in sequence, and gas is discharged through gas discharging valves on the tops of the dedusting box bodies. According to the method for rapid introduction of gas after the blast furnace is overhauled, medium repaired and put into production provided, time for introduction of blast furnace gas to the gaspipe network is shortened substantially, and production safety is improved.

Description

technical field [0001] The invention relates to a method for rapidly introducing coal gas after a blast furnace is overhauled and put into operation, and belongs to the technical field of blast furnace ironmaking production. Background technique [0002] After the blast furnace undergoes major and medium repairs and is put into operation, it is necessary to safely and smoothly introduce the generated gas into the company's gas pipeline network in time to reduce the time for gas release, and at the same time facilitate the rapid recovery of the blast furnace and improve the utilization of gas. Because gas is toxic, flammable and explosive, there are major safety hazards in the process of introducing gas. At the same time, when to introduce blast furnace gas into the gas pipeline network is a key factor for the speed of blast furnace recovery. At the present stage, the "positive" gas introduction method is mostly used, which takes a long time. During this period, a large amoun...

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Problems solved by technology

Because gas is toxic, flammable and explosive, there are major safety hazards in the process of introducing gas. At the same time, when to introduce blast furnace gas into the gas pipeline network is the key factor for the speed of blast furnace recovery.

At the present stage, most of the "positive" coal gas introduction methods take a long time. During this period, a large amount of gas is released, which wastes energy and pollutes the environment at the same time, and prolongs the recovery time of the blast furnace.

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