Bäddförbränning

Bäddförbränning refers to a combustion process where fuel burns within a bed of inert or combustible material. This bed can be composed of ash, sand, or even the fuel itself, depending on the specific application. The primary purpose of the bed is to moderate the combustion rate, promote thorough mixing of fuel and air, and preheat the incoming fuel, leading to more efficient and complete burning.

Different types of bäddförbränning exist, including fixed bed, moving bed, and fluidized bed combustion. In fixed bed systems, the fuel remains stationary while air passes through it. Moving bed systems involve the fuel slowly progressing through a combustion chamber, allowing for continuous feeding and ash removal. Fluidized bed combustion is characterized by a turbulent suspension of fuel particles in an upward flow of air, creating excellent heat and mass transfer, resulting in very high combustion efficiency and reduced emissions.

Bäddförbränning is commonly employed in industrial boilers, waste-to-energy plants, and biomass power generation. Its advantages include the ability to handle a wide variety of fuels, including those with high moisture content or varying particle sizes, and its capability for effective emission control, particularly when combined with appropriate air pollution control technologies. The controlled combustion environment within the bed helps to minimize the formation of harmful pollutants like nitrogen oxides and carbon monoxide.