A large amount of ash and slag were generated when petroleum coke that contained sulfur was fired by circulation fluidized-bed (CFB) boiler to desulfurize by adding limestone.

• 循环流化床锅炉在燃烧含硫石油焦时,通过加入石灰石在燃烧的过程中以固态的形式脱硫,燃烧后将产生大量的灰渣,过去处理灰渣最通常的方式是作土地填埋。