| 摘要 |
Desalination of seawater by solar energy using modular vessels in series made of corrosion resistant and insulating plastic material. The process involves two stages of a possibly multi-stage, using modular vessels (8) preferably made of corrosion resistant and insulating plastic material. High demand may dictate that a number of these series-connected vessels are arranged in parallel, a system easily realized by the modular construction of the vessels. The single external heat source is a plate heat exchanger (1) supplied with heat from a fluid passing through the solar heater circuit (4,5). Vapor from the seawater (14) passes via line (4b) into the heat exchanger (1) of the second vessel where it condenses and preheats the incoming seawater (14). The condensate is collected through line (16). Float valves to maintain a constant free space (15), which is evacuated, control the seawater level. The condensate is then treated chemically to make it suitable as drinking water.
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