▎ 摘　　要

NOVELTY - Heat self-balancing pervaporation membrane separation process, wherein the pervaporation membrane separation process is integrated with the vacuum compression process. The low heat enthalpy steam downstream of the membrane is heated by the direct vacuum compression, and then the heat is supplied to the pervaporation membrane separation process. USE - Heat self-balancing pervaporation membrane separation process for alcohol separation, organic solvent, dehydrating and volatile organic compounds (VOCs) recycling. ADVANTAGE - The heat self-balancing pervaporation membrane separation process: utilizes the direct steam vacuum compression unit, which can realize the input of lower energy to obtain more heat from the environment, the steam is compressed to improve the dew point and pressure, at the same time, improving the enthalpy, with high energy efficiency coefficient (COP); and saves the external heat supply, realizing the self-balance of the heat of the system. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the heat self-balancing pervaporation membrane separation technique, involves system turn on firstly pre-heating the material liquid in the material liquid tank (1) in an electric heating way, after a certain temperature, turn on circulating pump (2) and a vacuum compressor (5), the material liquid by the heat exchanger (3) is pumped to the pervaporation unit (4), the membrane separation unit part of the permeate liquid is adsorbed to the membrane, after the membrane downstream desorption is low heat enthalpy steam, then the consumption W in the vacuum compressor (5) is compressed into the high enthalpy steam. The high enthalpy steam is conveyed to the heat exchanger (3) for preheating the material liquid to provide vaporization latent heat Q downstream of the film, and closing the electric heating; high enthalpy penetration steam after heating in the heat exchanger 3 is condensed to normal temperature and normal pressure, and stored in the collecting bottle (6). The energy efficiency coefficient of the vacuum compression is Q/W.