Development of Continuous Freeze-concentration Equipment:A Report on Treated Quantity of Mother Liquor and Separation Efficiency

摘要

There is growing demand for simple freeze-concentration equipment that can operate intermittently.We have made freeze-concentration equipment consisting of an ice-maker,which continuously produces ice flakes on a rotating cooling drum,and a continuous centrifugal separator.Experiments using sea-water with this equipment led to the following results.1)The treated quantity of the mother liquor was 11.6-45.0 kg/h,the solute recovery rate 0.12-0.76,and the separation efficiency 0.16-0.49.2)Increased of ice flakes was the main cause of a decrease of separation efficiency.3)To improve separation efficiency,further study is required on shortening the residence time of ice flakes in the centrifugal separator.