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Application of vacuum membrane distillation technology in concentration of tobacco pure dew

Authors： ZHANG Zhao1, LI Yanfang1, ZHANG Cunyong1, TIAN Zhihao2, LIU Wenlong2, ZHANG Bing3, TIAN Zhenfeng1, HUANG Lan1, LI Chuanrun2,4, YAN Haiyang2,4, GE Shaolin1

Units： 1. Anhui Provincial Key Laboratory of Aerosol Analysis, Modulation and Biological Effect, Hefei 231200, China; 2. College of pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; 3. Zhejiang Province Tobacco Quality Supervision and Testing Station, Hangzhou 310001, China; 4. Pharmaceutical Engineering Technology Research Center, Anhui University of Chinese Medicine, Hefei 230012, China

KeyWords： vacuum membrane distillation; tobacco pure dew; reconstituted tobacco leaves; concentration

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2025,45(1):119-128

Abstract：

The tobacco pure dew obtained from steam distillation of the extract of reconstituted tobacco leaves was concentrated by vacuum membrane distillation. The influence of different operating conditions on the concentration of tobacco pure dew were investigated, in which the mass and heat transfer were discussed, and the surface contamination was characterized and analyzed. Results show that the membrane material, the vacuum degree on the permeating side, the temperature of the feed liquid, and the flow rate of the feed have obvious effects on the permeation flux and the retention rate, and the hydrophobic and oleophobic membrane based on PTFE has higher retention rate. The maximum permeable flux can reach 12.74 L/(m2·h) at 70 ℃ and 70 kPa, and the highest organic matter retention rate can reach 94.8% at the velocity of 0.5 cm/s. Therefore, the vacuum membrane distillation exhibits an excellent technical reliability and economic competitiveness in the concentration of tobacco pure dew.

Funds：

安徽省气溶胶解析调控及生物效应重点实验室开放课题（2022302）；国家重点研发计划项目（2022YFB3805100）；安徽省高校优秀青年科研项目（2022AH030063）；安徽中医药大学人才支持计划项目重大项目（2022rcZD005）

AuthorIntro：

张朝（1985-），男，河北保定人，硕士，高级工程师，主要从事烟草化学相关研究

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