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Date of Publication:2022-10-06

Journal:现代化工

Issue:3

Page Number:69-72

ISSN No.:0253-4320

Abstract:Gas-liquid two-phase flow enhancing vacuum membrane distillation (VMD) has been experimentally studied using a tubular carbon membrane.In the gas-liquid two-phase flow enhancing experiment of pure water and NaCl aqueous,the permeate flux increases by 29%-35%,and 16%-66% respectively compared with no gas sparging.Influences of gas flow,permeate-side vacuum degree and membrane orientation on flux are investigated.The results show that when the gas flow to liquid flow is (1～2)∶1,the enhanced result is optimum.The flux increases with the increase of permeate-side vacuum degree,in addition the flux amplitude is greater when the permeate-side vacuum degree is lower compared with the higher one.Also the influence of membrane orientation is very important,and the membrane mounted vertically leads to flux enhancement as high as about 131% as horizontally.

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