Process for burning coal more efficiently, cleanly, and cheaply. A stream of hot air is used to suspend a mixture of powdered coal and limestone during combustion. About 90 to 98 percent of the sulfur dioxide produced during combustion is removed by reaction with limestone to produce solid calcium sulfate.
Coal is burned in a bed of limestone that is suspended by an upward flow of air and gases and forms a dry calcium sulfate waste.
High pressure air is forced through a mixture of crushed coal and limestone particles, lifting the burning fuel and causing it to move like a boiling fluid. Fresh coal and limestone are added continuously to the top of the combustion bed while ash and slag are drawn off below.
A process for burning powdered coal that is poured in a liquid–like stream with air or gases. The process reduces sulfur dioxide emissions from coal combustion.
A process with a high degree of ability to remove sulfur from coal during combustion. Crushed coal and limestone are suspended in the bottom of a boiler by an upward stream of hot air. The coal is burned in this bubbling, liquid-like (or "fluidized") mixture. Rather than released as emissions, sulfur from combustion gases combines with the limestone to form a solid compound recovered with the ash.
A type of furnace or reactor in which fuel particles are combusted while suspended in a stream of hot gas.
Fluidized bed combustion (FBC) is a combustion technology used in power plants. FBC plants are more flexible than conventional plants in that they can be fired on coal, biomass, among other fuels. Fluidized beds suspend solid fuels on upward-blowing jets of air during the combustion process.