Grinding wheel of coal mill

Abstract

The invention discloses a grinding wheel of a coal mill. The grinding wheel comprises a bowl grinding wheel which is hollow. A grinding roller connector is arranged on one side of the grinding wheel and an air outlet of an exhaust fan is formed in the other side of the grinding wheel. Heating strips which are annularly and uniformly distributed are arranged on the bowl wall on the inner side of the grinding wheel. The heating strips are connected to a heating machine. The heating strips and a sealing cover on the outer side of the heating strips are sealed. An air guide pipe is arranged on thesealing cover, and the air guide pipe is connected to the exhaust fan arranged at the air outlet. In a working process of the coal mill, a grinding plate is good in extruding effect, adequate to feedand quick to dry. An air suction device can adjust the displacement of air, so that the pulverized coal discharging condition is controlled. In a condition of meeting the environmental protection demands, the production needs are met. The heating strips and a ventilating device can heat and dry powdered ink on the milling plate effectively, so that the grinding and pressing efficiency is accelerated.

Description

technical field [0001] The invention relates to a coal mill grinding wheel. 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 ...

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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