Small-sized sea water sea-water desalinator

The utility model relates to a small sea water desalting device which comprises pumps, a filter, a box body, a sterilizer, a drinking machine, relative pipelines of the drinking machine, valves and relevant circuits, wherein a sucking net of a suction pump is communicated with a lifting pump; the exact filter is communicated in turn with an ultra-filter, an electric cabinet, a high-pressure pump, a medicine adding pump and a medicine chest; the sterilizer is communicated with the drinking machine; the lifting pump is communicated in turn with an automatic cleaning bag type filter, an electronic dirt-blocking sterilizing algae removal apparatus and an exact filter through pipelines; the high-pressure pump is communicated with a secondary reverse filter through a pipeline. The utility model can automatically clear small grained suspended substances and part of colloid and alga; the utility model has high filtering precision, large water flow quantity, low pressure drop, no need of back flush water and high dirt containing capability; the utility model can effectively prevent film pollution and perform the functions of dirt blocking, dirt removal, sterilization and algae extinction; the reverse osmosis filtering of an RO film and the adjustment of PH value are carried out by medicine addition and the secondary reverse filter, and more than 99% of the salt in water and the boron element that is harmful to people can be eliminated. The utility model has the advantages of small volume, light weight, low electricity consumption, long service life and easy popularization; besides, the utility model supplies a gap of small sea water desalting equipment with the international standard in China. The utility model can be used for steamboats, islands, frontier defense and military equipment, and can also be applied to the fields of water for the living of littoral citizens, fishers, offshore petroleum platforms, etc.