Method for transferring heat between process liquor streams

摘要: A method of transferring heat between process liquor streams such as caustic in the Bayer for producing alumina from bauxite, utilizing a pipe arrangement exchange. The respectively pass contact with one surface first heat-exchange wall and second while being isolated surfaces two walls; these walls are exposed to closed volume (also both streams) containing transfer fluid that vaporizes below temperature hotter stream condenses above cooler stream. at contacted by stream, thereby (as vaporization) former latter.