Coal mill heating ventilation device

Abstract

The invention discloses a coal mill heating ventilation device. The coal mill heating ventilation device comprises a coal mill top cover, an upper grinding disc, a lower pressing disc and a coal millbase disc, wherein the upper grinding disc is movably connected to the coal mill top cover, the lower pressing disc is arranged on the coal grinding machine disc, the upper grinding disc comprises anupper pressing disc, hydraulic telescopic rods connected with the upper pressing disc, a hydraulic telescopic machine and a controller, wherein the upper pressing disc is in an inverted circular truncated cone shape, and the number of the hydraulic telescopic rods is multiple; in the working process of the coal mill, the extrusion effect of the grinding disc is good, the feeding is carried out, the drying is rapid, air suction amount can be adjusted by an air suction device, 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 heating strip and a ventilation device are used for effectively heating and drying the ink powder on the grinding disc, so that the grinding efficiency is accelerated.

Description

technical field [0001] The invention relates to a coal mill, in particular to a coal mill heating and ventilating device. 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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