Anthony G Galvan

US Patent:

56932227, Dec 2, 1997

Filed:

May 3, 1996

Appl. No.:

8/642556

Inventors:

Anthony G. Galvan - Sandy UT
Ravinder Menon - Richmond VA

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

C02F 124

US Classification:

210194

Abstract:

A dissolved gas flotation tank system is disclosed which is configured to provide educted gas or air into recirculated effluent fluid from the tank which includes a pump system which increases the dissolution rate of gas into the effluent fluid thereby eliminating the need for retention tanks and related equipment which adds to high equipment costs. The dissolved gas flotation tank system of the present invention also provides a pre-contact chamber for assuring immediate and intimate contact between the suspended solids in an influent feed stream and the recirculated effluent fluid in which gas is dissolved, as well as flocculant when used, to produce a better agglomerate structure for improved flotation and separation. The dissolved gas flotation tank of the present invention also provides an improved means of removing and processing float from the tank, and employs a dewatering system enhanced by the addition of chemicals or flocculants into the float removal system. The DGF tank system of the present invention may include process controls which monitor and regulate selected operation parameters.