Coal mill grinding disc

Abstract

The invention discloses a coal mill grinding disc. The grinding disc is divided into an upper grinding disc body and a lower grinding disc body. The upper grinding disc body is movably connected to the top of a coal mill, and the lower grinding disc body is arranged at the bottom of the coal mill. The upper grinding disc body comprises an upper pressing disc, hydraulic telescopic rods connected with the upper pressing disc, hydraulic telescopic machines and a controller, wherein the upper pressing disc is arranged in an inverted circular platform manner, the multiple hydraulic telescopic rodsare arranged, annularly arranged on the top of the upper pressing disc at equal intervals and connected with the hydraulic telescopic machines, and the hydraulic telescopic machines are connected withthe controller. The lower pressing disc is arranged in a circular tabletop manner, and the upper surface of the circular tabletop is arranged from the exterior to a groove gradually concaved in the center area. In the coal mill work process, the grinding disc extrusion effect is good, feeding is conducted in place, and drying is rapid; and through an air suction device, the air exhaust volume canbe adjusted, accordingly, the situation of coal powder discharging is controlled, and the production requirements are met under the condition that the environment protection requirement is met.

Description

technical field [0001] The invention relates to a coal pulverizer, in particular to a grinding disc of a coal pulverizer. 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,...

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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