Patent ID: 7449159

Claim:
A liquid processing device comprising, a container having an intake and an outlet, and heat-treated material pieces provided within said container, said material pieces each having an external shape of an equilateral hexagonal prism, and said material pieces each having a hole of an annular section penetrating through a base and a top thereof; an internal surface of said hole having a spiral groove; a material of said material piece being selected from the group consisting of austenitic stainless steel, martensitic stainless steel; a casing securely fixing the material pieces in an arrangement and said casing having openings in a top plate and a bottom plate corresponding to said holes of the material pieces; said arrangement being such that central axes of the material pieces are parallel to each other; wherein said central axes of each is an axis which is parallel to six sides of said equilateral hexagonal prism and perpendicular to said base and said top thereof; wherein said arrangement is one such that said material pieces form a second equilateral hexagonal prism within said casings and said holes in the material pieces and openings in the casing are aligned; wherein said material pieces within said casing are positioned in said container between the intake and outlet.