Raw coal bunker coal feeding device and coal interruption preventing method thereof

A technology of coal feeding device and raw coal bunker, applied in heating device, packaging, transportation and packaging, etc., can solve the problems of leakage of coal powder, waste of pressure relief and residual nitrogen recovery and utilization value, hidden danger of gas leakage in valve circuit, etc., to prevent production Increase in cost, increase the smoothness of coal supply, and reduce the effect of mill damage

CN112046949AActive Publication Date: 2020-12-08ZENITH STEEL GROUP CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-12-08

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Abstract

The invention relates to a raw coal bunker coal feeding device and a coal interruption preventing method thereof. The raw coal bunker coal feeding device comprises a raw coal bunker body, the raw coalbunker body comprises a bunker cone, the top end of the bunker cone is connected with a bunker main body, the bottom end of the bunker cone is connected with a coal feeder through a rod type valve, adehumidification pipeline is arranged at the top of the bunker cone, a blockage removing pipeline is arranged at the bottom of the bunker cone, a heat tracing device is arranged at the position, between the dehumidification pipeline and the blockage removing pipeline, of the middle of the bunker cone, and the heat tracing device is arranged on the outer wall of the middle of the bunker cone in the circumferential direction in a surrounding mode. According to the raw coal bunker coal feeding device and the coal interruption preventing method thereof, pressure relief residual nitrogen of an injection tank is recycled, so that the coal gas consumption can be reduced while raw coal is dried; heated nitrogen is designed to purge the bottom of the bunker cone of the raw coal bunker, and intermittent heating and cooling are conducted, so that the purposes of reducing bunker wall thickening and loosening a coal seam are achieved; and meanwhile, gas flow kinetic energy is utilized, the coal supply smoothness of the coal feeder is further improved, the occurrence rate of coal interruption accidents is reduced, damage to a mill is reduced, and the production cost is prevented from rising.
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Description

technical field

[0001] The invention relates to the field of coal powder spraying system equipment, in particular to a raw coal bunker coal feeding device and a method for preventing coal from breaking. Background technique

[0002] Coal powder preparation is widely used in modern industry. In many occasions, the pulverized coal pulverization system and the pulverized coal injection system are built together, such as the coal injection system supporting the blast furnace ironmaking project. In the integrated system of blast furnace pulverized coal production and spraying, there are generally two problems as follows: First, the pulverized coal feeder occasionally breaks coal accidents, the reason is that the raw coal in the cone of the raw coal bunker sticks to each other when the water content is high The phenomenon of hanging material or material accumulation, as well as the agglomeration of raw coal on the wall of the warehouse, narrows and reduces the feeding channel, whi...

Examples

Embodiment Construction

[0023] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0024] Such as Figure 1-4 As shown, a raw coal bunker coal feeding device provided by the present invention includes a raw coal bunker body, and the raw coal bunker body includes a bin cone 3, the top of the bin cone 3 is connected to the bin body 1, and the bottom end of the bin cone 3 is connected to the coal feed through a rod valve 7. Machine 8;

[0025] The top of the bin cone 3 is provided with a dehumidification pipeline 4, and the dehumidification pipeline 4 includes a dehumidification ring pipe 23 that is arranged around the inner wall of the top of the bin cone 3, and the dehumidification ring pipe 23 is used to introduce the residual nitrogen into...