Group control device of blast furnace gas bag-type dust removing system for conveying ash in pipeline

Abstract

The invention relates to a group control device of a blast furnace gas bag-type dust removing system for conveying ash in a pipeline, which comprises a big ash bin, a plurality of groups of bag-type dust removers and valve groups, wherein the ash removing interface of each bag-type dust remover is communicated with a pulse ash removing nitrogen pipeline through a pulse valve, and the ash discharging end of each bag-type dust remover is respectively communicated with each path of corresponding ash conveying nitrogen pipeline through an ash discharging valve; one end of the pulse ash removing nitrogen pipeline is communicated with the big ash bin through a second valve group, and the other end is communicated with a nitrogen source through a first valve group and a first nitrogen tank; one ends of the first path of ash conveying nitrogen pipeline and multiple paths of ash conveying nitrogen pipelines which are additionally arranged are communicated with the big ash bin, and the other ends are communicated with the nitrogen source through an ash conveying valve, a third valve group and a second nitrogen tank; and the valve groups are pulse nitrogen pressure maintaining valve groups. The invention can improve the operating efficiency and prolong the service life of equipment, can realize the multi-stage group control of the ash removing gas source pressure and the safe production of a blast furnace, and is suitable for reforming a new dust removing system or the traditional dust removing system.

Description

technical field [0001] The invention relates to the field of dust removal technology, in particular to a grouping control device for a blast furnace gas bag dust removal system used for pipeline ash transportation. Background technique [0002] The raw gas from the top of the blast furnace is distributed to the bag dust removal system by the semi-clean gas main pipe after passing through the gravity cyclone dust collector. In the raw gas chamber of the dust collector, the dust with larger particles settles naturally due to gravity and enters the ash hopper; the dust with smaller particles rises with the gas, and when passing through the filter bag, the dust is blocked on the outer surface of the filter bag, and the gas is refined. Dust. With the continuous progress of the gas filtration process, the dust accumulation on the outer wall of the bag gradually increases, and the filtration resistance continues to increase. When the resistance increases (or time) to a certain va...

AI Technical Summary

Problems solved by technology

Under abnormal working conditions of the blast furnace, the PLC provided by the complete set of dust collector equipment is not enough for the protective interlock control to ensure the safe production of the blast furnace and its own safety

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