A pressurized coal mill, sometimes referred to as a pressurized coal pulverizer, is an essential component in thermal power plants. It is used to crush coal into a fine powder for efficient combustion in the boiler's furnace. The term "pressurized" indicates that the milling process occurs in an environment where air or gas pressure is applied, ensuring that the fine coal particles are conveyed optimally into the furnace for combustion.
In a pressurized coal mill, raw coal is introduced into the mill where it is ground by large rollers or steel balls. The ground coal is then swept from the mill by a stream of pressurized air, and the mixture of air and finely ground coal is transported to the furnace. The pressurized environment helps in reducing the likelihood of explosions due to the presence of pulverized coal, as well as in improving the efficiency and consistency of the coal feed to the boiler.
The main advantages of pressurized coal mills include improved safety, consistent coal feed, improved combustion efficiency, and better control over the combustion process, which can lead to lower emissions.
