Combination multi-effect distillation and multi-stage flash evaporation system
a multi-effect distillation and flash evaporation technology, applied in the field of desalination, can solve the problems of increasing turbulent flow, limiting the design capacity of the unit and the maximum permissible operating temperature, and evaporators are susceptible to fouling
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[0041]The combination multi-effect distillation and multi-stage flash evaporation system 10, as shown in FIG. 1, combines a multi-effect distillation (MED) system, similar to the MED system 100 of FIG. 2, with a multi-stage flash (MSF) evaporation system, similar to the MSF evaporation system 200 of FIG. 3. The multi-stage flash evaporation portion of system 10, shown in FIG. 1, begins with a mixture of seawater feed and recycled concentrated brine entering the system under pressure, being drawn into conduits or pipes 32 via a mixer 68 or the like. The seawater feed is drawn from an outside source by a pump 28 and passes through the final condenser 24 of the multi-effect distillation portion of system 10, as will be described in detail below. Prior to injection into the MSF process, the total volume (or, alternatively, only a first portion) of seawater feed is preferably pre-treated by passage through a filtering system 40 using a nanofiltration (NF) membrane or the like. Selective ...
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