Energy efficient design and operation of continuous pans

Continuous pans offer considerable scope for improving the overall energy efficiency of factories. Measured steam usage rates on SRI continuous pans are substantially lower than typically used for batch pans on the same boiling duties. The continuous high-grade seed and A pans, which have the largest evaporation demand on the pan stage, operate with a minimal of excess steam above the evaporation demand. The magnitude of the steam savings depends on several aspects of continuous pan design, the method of control, and the level of skill and attention of the operators. The arrangements for boiling out continuous pans and incorporation of the wash out materials into process operations are also of importance. This paper examines the impact of these aspects on the energy consumption of factories and considers changes in pan design and operation for future reductions in energy consumption.