What is the most common type of solid fuel that is burned in boilers?

Pulverized coal is the most common type of solid fuel burned in boilers primarily due to its efficiency and energy density. When coal is pulverized, it is ground into fine particles that allow for better combustion. This process enhances the surface area of the coal, leading to improved burning characteristics, higher thermal efficiency, and more complete combustion. Consequently, this results in reduced emissions and less unburned carbon when compared to larger pieces of coal.

Furthermore, coal is widely available and has a long history of use in power generation, making it a cost-effective choice in many regions. Its widespread use in large-scale power plants has established it as the dominant solid fuel in the industry, as it can produce significant amounts of energy, fulfilling the demands of large boilers.

While wood pellets, natural gas, and fuel oil are alternative energy sources, they do not match the overall scale, efficiency, and economic advantages that pulverized coal offers in many industrial applications.