Huadian Technology ›› 2020, Vol. 42 ›› Issue (3): 25-30.

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Techno-economic analysis on membrane distillation in desulfurization wastewater ZLD process of coal-fired power plants #br#

  

  1. Beijing China Science Resources and Environmental Technology Company Limited,Beijing 100080,China
  • Online:2020-03-25 Published:2020-04-22

Abstract: Membrane distillation(MD),an emerging cut-edge technology,has advantages of anti-corrosion,anti-oxidation,low
operation cost and so on.It can be applied in desulfurization waste water zero liquid discharge(ZLD)process of coal-fired power
plants.Furthermore the plate-type multiple-effect MD process has been applied in waste acid recycling,ZLD of desulfurization
waste water containing chromium and high dissolved salt,and other industrial areas.Reasonable technical routes of three types of
membrane distillation applied in desulfurization waste water ZLD treatment were proposed after analyzing. Taking the 8 t/h
desulfurization waste water treatment process for a coal-fired power plant as an example,techno-economic analysis was made on
seven desulfurization wastewater treatment processes. The analysis results indicate that MD technology is suitable for
desulfurization waste water ZLD process,and can save investment and operation cost in equipment for coal-fired power plants.

Key words: coal-fired power plant, desulfurization wastewater, zero liquid discharge, membrane distillation, recycling, zero liquid discharge(ZLD)