Method for recovering heat in an alkaline pulp digesting process

摘要

A method and system for recovering heat in a pulp digesting process is disclosed. The method includes the steps of blowing a pulp and liquid mixture from a digester to a container such as a blow tank or blow cyclone; transferring flash vapor above a predetermined pressure, which is above atmospheric pressure, from the blow tank to a pressure accumulator; transferring flash vapor below the predetermined pressure from the blow tank to an atmospheric accumulator; and mixing the flash vapor with a processing liquid in the pressure accumulator.