The invention discloses a forward-condensing multiple-effect back-heating array type humidification and dehumidification solar-powered
seawater desalination device which comprises condensers,
humidifiers, condensing apparatuses and air channels.
Solar light incident from the upper side is condensed through the condensers, penetrates through
glass cover plates to reach the surfaces of the
humidifiers and is converted into
heat energy.
Seawater is sprayed on the
humidifiers, absorbs vapor of the
solar heat energy and performs heat and
humidity exchange with air to form saturated wet air, and the high-temperature wet air enters condensation cavities under driving of fans and performs heat exchange with cold
seawater to produce
fresh water. After the
seawater flows out of the condensers, a part of seawater is supplemented and sprayed on the humidifiers, and the residual seawater is discharged out of a
system. Non-evaporated
saline water drops on
saline water plates to be recycled, and redundant
saline water is discharged out of the device through the bottoms of the plates. The device can form the multiple-
effect system in an arrayed mode, multiple effect structures are identical, the high-temperature high-
humidity air and the
saline water in one
saline water plate are respectively delivered to another effect structure to heat the
saline water in the corresponding condenser and cool the wet air, and
latent heat discharged during vapor condensation is recovered to achieve the purpose of efficient
seawater desalination.