Apparatus for magnetically filtering wastewaters containing oil-

Details Apparatus for magnetically filtering wastewaters containing oil- Apparatus for magnetically filtering wastewaters containing oil-

1996-09-25

1998-06-16

Savage, Matthew O.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Filter cleaning

210222, 210267, 210274, 210275, B01D 3506

Patent

active

057664501

ABSTRACT:
Electro-magnetic filter apparatus and method of operating to separate and remove oily magnetic solids from wastewaters. The filter apparatus includes a filter assembly having an electro-magnetic coil that encircles a canister. The canister has an interior space defined by a wall surface and a first perforated baffle spaced apart from a second perforated baffle. The interior space contains a ferromagnetic matrix comprising split ring lock washers. The feed side end portion of the canister communicates with the wastewater source that contains the oily magnetic solids, a wash-water supply, a pressurized air supply and a disposal stream. The discharge side end portion of the canister communicates with a recycling stream, the disposal stream and the wash-water supply. A feed side valve arrangement selectively introduces the wastewater into the feed side end portion of the canister during filtering operations, and selectively injects a pressurized air/wash-water mixture from the wash-water and pressurized air supply into the feed side end portion of the matrix canister during up-flow backwashing operations. The ferromagnetic matrix is fluidized by the pressurized air/wash-water mixture the during the up-flow backwashing. A discharge side valve arrangement selectively discharges clean effluent through the recycling stream during filtering or introduces water, from the wash-water supply, into the discharge end portion of the matrix canister during down-flow backwashing.

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Eriez Magnetics Publication OTB-440C dated 1992, Title: High Intensity Magnetic Filter.

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