Experimental Investigation On the Hybrid System of Mechanical Vapor Recompression and Hollow Fiber Vacuum Membrane Distillation Applied for Wastewater Treatment
In order to achieve zero discharge and resource utilization of industrial high salt wastewater, a hybrid system of mechanical vapor recompression (MVR) and hollow fiber vacuum membrane distillation (HFVMD) was designed and constructed, and a series of performance experiments of air tightness, single working condition and multiple working conditions were carried out with ammonium chloride solution as feed, then thermal economic performance were evaluated via a single factor analysis method. The obtained results showed that the system had better airtightness to ensure normal evaporation experiment. At a feed temperature of 75℃, feed flow rate of 10 m3·h-1, feed concentration of 5% and compressor frequency of 25 HZ, the compression ratio, evaporation rate, compressor power and condensate conductivity were obtained as 1.625, 45 kg·h-1, 5.4 kW and 11.77 uS·cm-1, respectively. The system could achieve stable freshwater production and high efficient separation by combining the advantages of the hydrophobic membrane evaporation and latent heat recovery in view of MVR and HFVMD technologies. Furthermore, increasing feed temperature and feed flow rate increased evaporation rate and decreased evaporation energy consumption, while increasing feed concentration decreased evaporation rate and increased evaporation energy consumption. Finally, the single factor analysis indicated that total investment cost, annual operation cost and annual evaporation capacity were the main factors while environmental cost and equipment service life were the secondary factors which affected the specific evaporation cost. The obtained results provides theoretical and experimental basis for the development and utilization of the system in the future
Year of publication: |
[2023]
|
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Authors: | Si, Zetian ; Zhuang, Xiao ; Zhou, Di |
Publisher: |
[S.l.] : SSRN |
Saved in:
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