Patent ID: 8349162

Claim:
An electronic osmotic dehydrator of electrophoresis style with a phase control using three-phase current, wherein it comprises a rotating drum, which turns on a drum axis, to the cylindrical inner circumference of which DC power with one polarity is applied, a caterpillar running on an endless track at a given space from the rotating drum to which the DC power with the opposite polarity is applied, and two filter cloth belts for conveying and dehydrating of sludge as wound between the rotating drum and the caterpillar, and it has a power applying structure that the three-phase alternating current power is used as input power and the DC power with opposite polarities to each other is applied respectively to the rotating drum and the caterpillar; and wherein the DC power of the power applying structure has a structure that it is converted into the variable DC power through a phase control circuit formed by combining thyrist electrical elements that a gate terminal is provided in the three-phase alternating current power with a controller, the variable converted DC power with the one polarity is applied to the rotating drum, the variable DC power with the opposite polarity is applied only to a section of the caterpillar corresponding to the dehydrating domain where the rotating drum and the caterpillar rotate on the same path, and the rotating drum has a structure that the edge of the multi-layer plate on which a stainless plate, a copper plate, a titanium plate and a platinum-based coating agent are laid in order, is perforated to provide a plural number of fastening holes, a plurality of round bars made of metal material having low electrical conductivity are inserted respectively into fastening holes and further fixed by welding, and respective plates are tightly fixed to respective round bars by a plurality of tapping bolts made of insoluble material.