Coal mill

Abstract

The invention discloses a coal mill. The coal mill comprises a coal mill top cover, an upper grinding disc, a lower pressing disc and a coal mill base disc, wherein the upper grinding disc is movablyconnected to the coal mill top cover, the lower pressure disc is arranged on the coal mill base disc, and the upper grinding disc comprises an upper pressing disc, hydraulic telescopic rods connectedwith the upper pressing disc, a hydraulic telescopic machine and a controller; the upper pressing disc is in an inverted circular truncated cone shape; the number of the hydraulic telescopic rods is multiple, and the hydraulic telescopic rods are arranged at the top of the upper pressing disc at equal intervals in an annular mode and are connected with the hydraulic telescopic machine; and in theworking process of the coal mill, the squeezing effect of the grinding disc is good, the feeding is carried out, the drying is rapid, an air suction device can adjust the exhaust volume of the air, the condition that the coal powder is discharged is controlled, the production requirement is met under the condition that the environment-friendly requirement is met, a rotary scraping plate arranged on a grinding wheel can effectively remove the coal blocks adhered to the grinding wheel, and the block grinding wheel extrusion grinding efficiency is accelerated.

Description

technical field [0001] The invention relates to a coal mill. Background technique [0002] At present, one of the more competitive coal mills in the medium-speed coal mill market at home and abroad is the HP coal mill, and the other is the SM coal mill, and the two coal mills have their own advantages and disadvantages. The advantages of HP coal mills are simple structure, high operational reliability, convenient maintenance, short downtime and relatively low price; their disadvantages are that the grinding efficiency is not high enough, the air-to-coal ratio is too large, and the boiler efficiency cannot be fully utilized. The advantage of the SM coal mill is that it has high grinding efficiency, small air-to-coal ratio, and high concentration of pulverized coal. The SM coal mill can ensure higher efficiency of the boiler; its disadvantages are that the structure is relatively complicated, there are many castings, the ventilation resistance is large, and the price is relati...

AI Technical Summary

Problems solved by technology

The advantages of the HP coal mill are simple structure, high operational reliability, convenient maintenance, short downtime and relatively low price; its disadvantages are that the grinding efficiency is not high enough, the air-to-coal ratio is too large, and the boiler efficiency cannot be fully utilized

The advantage of the SM coal mill is that it has high grinding efficiency, small air-to-coal ratio, and high concentration of pulverized coal. The SM coal mill can ensure higher efficiency of the boiler; its disadvantages are that the structure is relatively complicated, there are many castings, the ventilation resistance is large, and the price is relatively comparative. high

Therefore, both types of coal mills have room for improvement, but there is no new type of coal mill that has both the advantages of both and discards its disadvantages.

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