Elimination of air and water pollution by double-stage scrubber

Abstract

This new scrubbing system has been developed to eliminate entirely air pollution caused by water cooling towers during oil or fat deodorization. It also minimizes water effluent. In industrial application for more than one year, this system is based on the action of two scrubbers placed in series. The first scrubber is a conventional one, whereas the second uses concentrated cooled brine circulating in closed circuit as the condensing medium. A thorough purification of water vapors is thus achieved before the volatiles from the deodorizer enter into the high vacuum bosters. As a practical result of this special scrubbing process, the condensing water of the barometric condensers can be entirely recycled and this water is cooled by means of clean water in a surface heat exchanger requiring minimum maintenance for cleaning.