Formation of precoat layer for filtration apparatus and filtration method

Abstract

Abstract PURPOSE:To form a thick precoat layer of good quality by using a trace amt. of a high molecular flocculant together with pulverized coal(coke) to form a precoat layer for a filtration apparatus. CONSTITUTION:Water is charged into a water tank outside of a rotary drum, and pulverized coal(coke) is added to make a slurry, to which a small amt. of a high molecular flocculant is added. A thick precoat layer of good quality is formed on filter cloth lining the surface of the rotary drum by starting the suction and revolution of the rotary drum. The wire gauze with small meshes or a screen made by setting wedge wire are used other than the filter cloth in accordance with filtration apparatuses of different kinds. In either case, the precoat layer of good quality can be formed by this method.

Inventors

• 👤 Yoshihiro Watanabe
• 👤 渡辺　佳弘

Bibliographic Details