Method for improving utilization of sulphur-absorbent containing calcium in a power plant and equipment for performing the method

摘要

A method for improving utilization of sulphur-absorbent containing calcium, in a power plant burning fuel in a fluidized bed (12) of particulate material in a combustion chamber (11). When fresh absorbent is prepared it is crushed and the crushed material is subsequently divided into a fine and a coarse fraction. The fine fraction is calcinated, mixed with crushed coal (41) and used as drying agent. The invention also relates to a power plant having equipment (28) for calcinating a fine-particled fraction of fresh sulphur-absorbent, and also equipment for mixing coal (41) and the calcinated absorbent and equipment (46, 48) for feeding the mixture of absorbent and coal into the bed. (FIG. 3).