An advanced coke plant total control system developed at Sumitomo Metals is described. It has two main control functions. One is a coal blending ratio control system to attain target coke quality under the planned operating conditions. The other is a coke oven temperature control system to attain the target pushing-out coke temperature under the charged blended coal and coking time. The coke quality is controlled by the goal programming method using a theoretical coking model and an online coal dilatation sensor. The coke temperature is controlled by a heat transfer model in the coke chamber and an optimal regulator based on an autoregressive model. This total control system has been applied at the Wakayama Steel Works, and as a result the coke oven heat consumption and coal cost for the production of coke for iron making use have decreased markedly.
展开▼
