Patent ID: 8501004
Filing Date: 2013-08-06
Classification: B01D,B63J,C02F

Abstract:
1. A ballast water treatment device, comprising: A filtering unit filtering ballast water introduced into a ship using a filter; A vortex generating unit generating an artificial vortex in the ballast water filtered by the filtering unit; An ultraviolet treatment unit having an ultraviolet lamp which sterilizes the ballast water discharged from the vortex generating unit using ultraviolet rays; and A protective screen provided on a front end of the ultraviolet treatment unit, said protective screen generating a vortex in ballast water and removing foreign substances from the ballast water, thus protecting the ultraviolet treatment unit, wherein the protective screen comprises a mesh net formed by crossing lateral and longitudinal ribs with each other, and the lateral and longitudinal ribs are placed obliquely at a predetermined angle to collide with the ballast water which flows in a body of the ultraviolet treatment unit, thus changing a direction in which the ballast water moves, therefore generating a vortex; Whereby the ballast water is uniformly mixed by the vortex generated by the vortex generating unit, so that a sterilization effect is enhanced, and a distance between the filtering unit and the ultraviolet treatment unit is reduced, so that compactness of the ballast water treatment device is realized.