A METHOD OF COMBUSTION AND A COMBUSTION PLANT

摘要

A fuel is combusted in a combustion plant having a combustion chamber (1) enclosing a bubbling fluidized bed (4) in which the combustion of a fuel is arranged to be performed while forming combustion gases. Furthermore, the plant comprises members (5) for feeding of a oxygen-containing gas from beneath to the bed (4), a tube arrangement (22) provided in the combustion chamber (1) and arranged to receive heat generated at the combustion, and a purification device (9, 10, 11) for purifying said combustion gases. The purification device comprises a separating member (9) arranged to separate particulate solid material from said combustion gases and a device (23) arranged to recirculate the separated material to the combustion chamber (1). Furthermore, means (41, 51, 47) are arranged to regulate the quantity of separated solid material supplied to the combustion chamber (1) in such a manner that the heat transfer to said tube arrangement (22) is controlled.