Method for dewatering water-containing organic substance

摘要

The present invention is to provide a VP dewatering method being applicable over a wide range, having good handling properties, and being economically efficient and highly energy-saving, which comprises compression-pressuring a dewatered vapor product to elevate a condensation temperature thereof and then re-using the same as a heat source for vaporizing a supply liquid. In dewatering a water-containing organic substance which is a liquid starting material according to a vapor permeation membrane separation method, a dewatered organic substance vapor discharged from a membrane module is pressurized with a compressor to elevate the condensation temperature of the vapor and then the vapor is fed to a vaporizer of said method to collect and use the latent heat of condensation thereof.

主权项

1. A method for dewatering a water-containing organic substance, which comprises dewatering a water-containing organic substance of a liquid starting material according to a vapor permeation membrane separation method, characterized in that the dewatered organic substance vapor discharged from a membrane module is pressurized with a compressor to elevate the condensation temperature of the vapor and then the vapor is fed to a vaporizer used in said method to collect and use the latent heat of condensation thereof.