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Coal pulverizer machine is an important equipment for boiler coal burning, and it is widely used in thermal power plants. With the development of modern technology, the coal pulverizer machine technology has made great progress, the equipment configuration is higher, and the types are more abundant. While meeting the needs of modern industrial production, it also brings difficulties to the selection of thermal power plants. Therefore, this article mainly introduces the current classification of coal pulverizer machines and their selection principles.
According to the different working speeds of the equipment, the wind swept coal pulverizer machines in thermal power plants can be roughly divided into the following three types:
- 1. Low-speed coal pulverizer machine. The speed range is 15-25r/min, such as cylindrical steel ball coal mill, double inlet and double outlet steel ball mill coal pulverizer and so on.
- 2. Medium-speed coal pulverizer machine. The speed range is 50～300r/min, such as medium-speed flat-plate coal mill, bowl-type medium-speed coal mill (RP mill), MPS medium-speed coal mill, and medium-speed steel ball mill.
- 3. High-speed coal pulverizer machine. The speed range is 50～1500r/min, such as fan coal mill, hammer coal mill, etc.
Principles and Points for Attention in the Selection of Coal Pulverizer Machine
Different coal pulverizing systems have different coal types and coal pulverizer machines. When selecting equipment, comprehensive consideration should be given to the adaptability of coal types and the level of power consumption. In addition, the following points should be noted:- 1. The pulverizing system that uses anthracite generally uses an intermediate storage steel ball mill coal pulverizer. However, the double-in and double-out steel ball mill coal pulverizer direct-blowing pulverizing system has the disadvantages of high exhaust gas emissions, high cost, and high power consumption.
- 2. The direct-blowing pulverizing system of the medium-speed coal pulverizer machine has greater advantages compared with the direct-blowing pulverizing system of the fan coal pulverizer machine. The service life of the grinding parts of the medium-speed coal pulverizer machine is longer than that of the fan coal mill, and the maintenance workload is less.
- 3. The equipment should be selected after determining the service life of the grinding parts according to the coal pulverizer life curve or calculation formula according to the wear index of the coal and the fineness of the coal powder. The life of the grinding parts of the medium-speed coal mill should be greater than 6000h. For the MPS type coal mill, the grinding parts refer to the single-sided life of the roller.
In summary, when choosing a coal pulverizer machine, the combustion characteristics, grindability, and fineness requirements of coal should be considered as much as possible, and the power consumption level should be considered. Under the same conditions, the medium-speed coal pulverizer machine has greater advantages, and its grinding parts have a long service life and less maintenance work.Our company is a professional coal mill manufacturer. Various types of coal pulverizer machines of different specifications can meet the different needs of thermal power plants. We will reasonably configure the equipment according to customer needs.
