Modelling in-furnace sorbent injection for control of sulphur dioxide

A process model has been developed which is able to predict with confidence the sulphur-dioxide removal performance of sorbent injected into the furnace for control of SO 2 . The model requires limited input information on the boiler plant conditions and the sorbent. It has been validated against laboratory and industrial-scale plant data, and gives a good prediction of sulphur-dioxide removal for both limestone and dolomitic sorbents. Therefore this model provides industrial plant designers and process operators with a valuable tool, enabling them to assess the performance of in-furnace sorbent injection for their plant, as well as selecting the most suitable sorbent and identifying the optimum location for the addition of sorbent.