The invention discloses a solar
seawater desalination device, which comprises a
vacuum tube type
solar heat collector with cold and hot
water tanks, a combined evaporative condenser, a
seawater evaporator, a vapor condenser, a scroll
vacuum pump, a
heat pump circulation
system, a
fresh water tank, a strong brine tank, a
sieve plate, a pressure reducing valve and the like. The device adopts the scroll
vacuum pump to obtain higher negative
system pressure to reduce the
evaporation temperature of
seawater; between the seawater
evaporator and the vapor condenser, the
heating cycle of a
heat pump is utilized to supply the
latent heat released by vapor condensation to the seawater
evaporator and provide the heat for the
evaporation of the seawater, and the device fully and effectively recovers the
latent heat of condensation of
water vapor; and the combined evaporative condenser is adopted to ensure that the seawater can be immediately condensed after the
evaporation of the seawater and reduce the load of the
vacuum pump. The device has the advantages of high efficiency, low
energy consumption, compact structure, high
fresh water yield and the like, and is suitable to solve the
water drinking problem in water-deficient areas and the
water drinking problem of operating personnel on ships and offshore platforms all year round.