Blast furnace gas purification system

Abstract

The invention discloses a blast furnace gas purification system and relates to the field of blast furnace steel production. The blast furnace gas purification system comprises a gravity deduster, a dedusting box and a control sub-system. The gravity deduster outputs half-purified gas through a half-purified gas inlet main pipeline, the dedusting box is communicated with the half-purified gas inlet main pipeline through a half-purified gas inlet branch pipeline, a half-purified gas inlet main valve is arranged on an inlet gas main pipeline and welded onto the half-purified gas inlet main pipeline through a connection sealing fin. The blast furnace gas purification system can achieve on-off operation of half-purified gas through the half-purified gas inlet main valve, and meanwhile the risk of half-purified gas leakage is reduced. The blast furnace gas purification system replaces a traditional flange connection mode between a pipeline and a valve through a welding mode, enables the pipeline and the valve to be integrated and has the same expansion deformation degree and fundamentally eliminates the safety hazard of breaking between the pipeline and the valve, and meanwhile, the connection sealing fin can effectively prevent gas from leaking.

Description

technical field [0001] The invention relates to the field of blast furnace iron and steel production, in particular to a blast furnace gas purification system for gas purification. Background technique [0002] The current blast furnace gas purification system includes a gravity dust collector and a dust removal box, and a box inlet butterfly valve and an inlet flapper valve are arranged at the inlet pipeline of each dust removal box. When working, it is necessary to open or disconnect the inlet butterfly valve and inlet flapper valve corresponding to each dust removal box, which is inconvenient to operate; at the same time, the gas will overflow normally during the opening and closing process, which increases the risk of operation safety; long-term high Frequent breaking will reduce the service life of all box inlet butterfly valves and inlet flapper valves. The traditional connection between the pipe and the valve is flange connection, and rubber pads are installed at the...

AI Technical Summary

Problems solved by technology

When working, it is necessary to open or disconnect the inlet butterfly valve and inlet flapper valve corresponding to each dust removal box, which is inconvenient to operate; at the same time, the gas will overflow normally during the opening and closing process, which increases the risk of operation safety; long-term high Frequent breaking will reduce the service life of all box inlet butterfly valves and inlet gate valves

The traditional connection between the pipe and the valve is flange connection, and rubber pads are installed at the joint between the pipe and the valve. However, in the blast furnace gas purification system, since the temperature will reach above 100 degrees, it will cause expansion and deformation of the pipe and valve. It is easy to break under the stress of deformation, causing a great safety hazard

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