Impeller device and coal mill

Abstract

The invention provides an impeller device and a coal mill, and relates to the technical field of coal milling equipment. The impeller device is arranged in a side machine body device of the coal mill,and the coal mill comprises a milling bowl device with a milling bowl. The impeller device comprises an impeller mechanism, the impeller mechanism comprises an inner ring, an outer ring arranged around the inner ring, and a plurality of flow guide plates arranged in a flow guide gap between the inner ring and the outer ring and used for connecting the inner ring and the outer ring, the flow guidegap is divided into a plurality of flow guide cavities by the flow guide plates, flow guide openings for air outlet are formed in the upper portions of the flow guide cavities, and the flow guide openings are as high as the milling bowl. The impeller device further comprises a guide mechanism arranged above the impeller mechanism and an adjusting cover arranged on the guide mechanism, and the adjusting cover can move up and down relative to the impeller mechanism so as to adjust a gap between the adjusting cover and the impeller mechanism. The coal mill comprises the side machine body device,a separator device, a milling bowl device, a milling roller device and the impeller device.

Description

technical field [0001] The invention relates to the technical field of coal grinding equipment, in particular to an impeller device and a coal grinding machine. Background technique [0002] A coal mill is a device that grinds raw coal into coal powder, and then sends the coal powder to the furnace of the boiler for combustion to generate electricity. The coal mill mainly includes a side body device, a separator device, a grinding bowl device, a grinding roller device, and an impeller device. The hot air in the primary air duct can generate an upward lift force through the impeller device, and the coal powder is separated by the separator device. [0003] The design of the impeller device in the prior art is unreasonable, the flow velocity of the hot primary air is uneven, and the air flow is partially blocked, which is easy to generate turbulent flow, which causes the problem of excessive discharge of pebble coal. In addition, the impeller device in the prior art is also ...

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Problems solved by technology

[0004] The present invention provides an impeller device and a coal mill, aiming to improve the impeller device applied to the coal mill in the prior art, the flow velocity of the primary air generated is not uniform, and the air flow is partially blocked, which is easy to generate turbulent flow and discharge of pebble coal The problem of too much

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