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本文比较了单用和两用多级闪发蒸馏装置及海水反渗透装置的能耗。蒸馏装置的能耗包括热耗和电耗;反渗透装置的能耗就是电耗。为了能进行确切的比较,无论是热耗或电耗都折算成锅炉装置或者相应的热电站的燃料消耗。作者考虑了反渗透装置的能量回收并且表明,典型例子的能耗可望下降大约35%。虽然反渗透所需的一次能耗显著低于两用蒸馏式,但在5000～15000米~3/日的范围内,如果考虑投资费、能量费、更换费以及其他操作费,则两者的总费用相差大约5%以内。如果薄膜的寿命从3年延长到5年,特别是产量小的装置,反渗透装置造水的成本费就大大低于蒸馏式。
This article compares the energy consumption of single and dual-stage flash distillation units and seawater reverse osmosis units. The energy consumption of the distillation unit includes heat consumption and power consumption; the energy consumption of the reverse osmosis unit is the power consumption. In order to be able to make an exact comparison, either the heat or electricity consumption is converted into the fuel consumption of the boiler plant or the corresponding thermal power plant. The authors considered the energy recovery of the reverse osmosis plant and showed that the energy consumption of a typical example is expected to decrease by about 35%. Although the primary energy consumption required for reverse osmosis is significantly lower than dual-purpose distillation, in the range of 5000 to 15000 m 3 / day, considering the investment costs, energy costs, replacement costs and other operating costs, The difference between the total cost of about 5%. If the life of the membrane is extended from three years to five years, especially for smaller plants, the cost of making reverse osmosis plants is significantly lower than that of distillation.