The pulverizer is a kind of machinery that crushes and crushes coal into powder, and is an indispensable supporting equipment in the pulverized coal furnace. It mainly produces various types of mills, such as vertical mills, high-pressure hanging roller mills, medium-speed micro powder mills, ultra-high-pressure trapezoidal mills, Raymond mills, etc. When grinding, first send the large raw materials to the crusher, so that it is crushed into materials with a particle size of less than 35 mm, and then use a dump truck to transport the crushed raw coal with less than 15% moisture to the raw coal shed with a dump truck, the raw coal stored in the coal shed is loaded into the coal receiving hopper through the loader, and the raw coal in the coal receiving hopper is evenly fed to the bucket elevator through the speed regulating feeding belt conveyor, and the raw coal is unloaded after being lifted to the required height by the elevator, and enters the pulverizing system through the double-layer airlock valve.
The crushed raw coal conveyed by the elevator enters the mill (vertical mill, high-pressure suspension roller mill, medium-speed micro grinding mill, ultra-high pressure trapezoidal mill, Raymond mill, etc.), after crushing, the pulverized coal undergoes mass transfer and heat transfer in the high-temperature air of 200-350, and the water vapor flows into the flue gas from the coal and is dried by hot air.
The dried powder particles are fed into the separator by means of an air stream for separation. The ball mill adopts frequency conversion speed regulation, and the frequency converter is adjusted, and the fineness of the ball mill can be remotely controlled. The selected coarse powder is returned to the ball mill for grinding, and the fine powder enters the pulverizing system together with the air flow through the pulverized coal air supply pipeline.
Under the negative pressure of the induced draft fan of the explosion-proof bag dust collector, the pulverized coal with the required particle size is separated from the separator, and sent to the flameproof bag dust collector through the air supply pipeline, and the pulverized coal is collected and falls into the pulverized coal hopper at the lower part of the dust collector, and the flue gas is filtered and purified, and then discharged into the atmosphere by the chimney. The pulverized coal stored in the pulverized coal hopper enters the silo through the star-shaped discharger and screw conveyor.