Abstract

The improvement of thermal energy efficiency of the cement clinker manufacturing process can be achieved at macro energy control levels. Variable coal feeding rate (VCFR) control is proposed to improve thermal energy efficiency of the cement clinker manufacturing process. The current implementations mainly focus on process control or equipment control without considerations of energy distribution at the system level. In this paper, an optimal variable coal feeding rate control strategy combined the energy efficiency calculation model and energy hub model is proposed to optimize energy distribution of the cement clinker manufacturing process. Meanwhile, system constraints are taken into considered. A 5000t/d cement clinker manufacturing process is taken as a case study, and great savings of coal are achieved by the optimal control strategies.

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