Patent ID: 8192620

Claim:
A ballast-water treating apparatus comprising: a pipeline for supplying water to a ballast tank of a ship and for discharging water from the ballast tank, a ballast pump installed on said pipeline for supplying and discharging ballast water, an ozone generator or a hydrogen peroxide generator, a gas/liquid injection pipe for delivering the generated ozone or hydrogen peroxide into said pipeline, and an in-line mixer that includes (1) a main tubular part that has a predetermined inside diameter, (2) a subsidiary tubular part that (a) has an inside diameter that is smaller than that of said main tubular part and an outside diameter that is smaller than that of said main tubular part, (b) is directly connected to a circular plate at one end of said main tubular part, and (c) has multiple projections on the inside surface, (3) a vane seat, which is mounted in said main tubular part, and which comprises (a) a through-hole, wherein the inside diameter of the through-hole is equal to the inside diameter of said subsidiary tubular part, and a length of the through-hole is predetermined, and (b) a tapered part, which connects said inside diameter of said main tubular part to said inside diameter of said through-hole so as to maintain a high flow rate of said water, which has an oblique angle of 45 degrees, and (4) two blades that are mounted on said gas/liquid injection pipe being inserted into said vane seat, and that are placed inside said through-hole.