SAETT ATT AOTERVINNA TERPENTIN OCH VAERME I SAMBAND MED INDUNSTNING AV SVARTLUT SOM FRAON EN KONTINUERLIGT ARBETANDE CELLULOSAKOKARE AVGAOR UNDER HOEGT TRYCK OCH HOEG TEMPERATUR

摘要

A method of recovering turpentine and heat in connection with the evaporation of black liquor emerging from a continuousworking cellulose digester at a high temperature and under high pressure, wherein the black liquor is evaporated by expansion and vapors derived from the expansion evaporation of the black liquor are brought into an indirect heat exchange contact with the digesting liquor or with a precursor thereof in order to concentrate the latter.