COAL Powder Making Project-LM VERTICAL ROLLER MILL2020-10-29

Material Introduction

Coal, as a non-renewable resource, is also an important energy source. At the same time, it is also used in metallurgy, chemical, cement, electric power, heating, heating, boilers and other industries as a good-quality fuel. At present, large-scale thermal power plants are still dominated by pulverized coal boilers. In recent years, as my country's coal resources have become increasingly scarce, the processing and utilization of coal is also developing in the direction of refinement. Coupled with the maturity of new technologies such as coal chemical industry, coal-to-gas, coal-to-oil, and pulverized coal boilers, coal is becoming more and more important in human life.

Brief Description Of System Process

The raw coal is sieved from the raw coal storage yard through a grid screen and then falls onto a large inclination belt conveyor or hoist. After the iron is removed by the electromagnetic separator, the belt conveyor or hoist sends the raw coal to the raw coal bunker for storage.

After the pulverizing system has started, open the rod valve at the bottom of the raw coal bunker, start the sealed metering belt coal feeder, and the raw coal enters the vertical coal mill for drying and grinding.

The hot air or waste gas from the hot blast stove is drawn by the system fan and enters the vertical coal mill. After fully heat exchange with the ground coal in the mill, the pulverized coal is taken up and separated at the separator. The unqualified coarse pulverized coal falls back to the grinding disc for grinding, and the qualified pulverized coal enters the explosion-proof air box pulse dust collector with the air flow and is collected, and is discharged into the pulverized coal silo through the dividing wheel.

The sundries in the raw coal, such as some coal gangue, metal blocks, etc., are discharged out of the mill through the air ring and the slag outlet.

There are oxygen and carbon monoxide detection devices in the production process, as well as a nitrogen system and a carbon dioxide fire extinguishing system, which can ensure the normal operation of the system and reduce accidents when processing coal with higher volatile content.

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