Filtering method and filtering device

Details Filtering method and filtering device Filtering method and filtering device

2006-07-11

2006-07-11

Popovics, Robert James (Department: 1724)

Liquid purification or separation

Processes

Separating

C210S791000, C210S798000, C210S097000, C210S193000, C210S411000, C210S778000, C210S744000

Reexamination Certificate

active

07074338

ABSTRACT:
Using the filter auxiliary agent separated by backwashing from a filter element repeatedly and effectively, the consumption amount of a filter auxiliary agent and the generation of industrial waste can be suppressed. In a filter auxiliary agent pre-coat circuit, a filter auxiliary agent in a pre-coat tank is attached and stacked on a filter element in a filter case, and a filter auxiliary agent layer is formed. In a filter circuit, the filter auxiliary agent layer of the filter element removes sludge in the filter treatment liquid in a main tank. A backwashing circuit breaks down the filter auxiliary agent layer and a sludge layer, separates the filter auxiliary agent layer and the sludge layer by backwashing from the filter element, and circulates to the pre-coat tank. After repeating these steps a plurality of times, the filter auxiliary agent and sludge separated by backwashing are taken out to the exterior.

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