Therefore the pollution of waste acid base discharge was avoided, the water quality improved, and the overall utilization of circulating water upraised.

The by-product waste sulfuric acid from sulfuric acid alkylation is viscous and contains many impurities, it must be treated for comprehensive utilization.

This paper makes an approach to technological process for and solution of problems in utilization of plenty of waste heat generated after adjustment of roasting and acid making cooling system.