The steam consumption of the thin alkali liquid evaporation process is one of two most energy consumptions in the chlor-alkali factory, and it is only next to the electricity consumption. In this paper, the energy-saving and consumption decrease were studied in the process of thin alkali liquid evaporation in the chlor-alkali factory of Panzhihua iron and steel company.The influences of two-effect pressure, feeding concentration, temperature on the steam consumption were detailedly discussed and analyzed. T...