METHOD FOR DEWATERING WATER-CONTAINING ORGANIC SUBSTANCE

摘要

Disclosed is a VP dewatering method being applicable over a wide range, having good handling properties and being economically efficient and energy-saving, which comprises compression-pressurizing a dewatered vapor product to elevate the condensation temperature thereof and then re-using the same as a heat source for evaporating a supply liquid. In the course of dewatering a water-containing organic substance, which is a liquid starting material, by the vapor permeation membrane separation method, the dewatered organic substance vapor product discharged from a membrane module is pressurized with a compression machine to elevate the condensation temperature of the vapor and then the vapor is fed to an evaporator to collect and use the latent heat of condensation.