Multi-stage flotation column

Details Multi-stage flotation column Multi-stage flotation column

1996-12-11

1999-04-27

Lithgow, Thomas M.

Liquid purification or separation

With means to add treating material

Directly applied to separator

210194, 2101951, 210322, 210262, 210320, 209170, C02F 124, B03D 124, B01D 17035

Patent

active

058977724

ABSTRACT:
An apparatus and method are disclosed for environmental applications such as waste water treatment, de-inking of recycled paper, chemical/biochemical waste clean-up, and mineral beneficiation, using a multi-stage flotation column. A series of draft tubes arranged axially and separated by baffles provides individual mixing stages in the flotation column and a special gas distributor generates fine gas bubbles. The draft tubes create repetitive loop flow of the feed fluid in each flotation stage. This provides uniform distribution of the gas bubbles throughout the column and significantly enhances mixing and contacts of the gas bubbles with the impurities to be removed.

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