The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1998
Filed:
Sep. 25, 1996
Stewart T Herman, Hellertown, PA (US);
Robert L Greenawalt, Ottsville, PA (US);
Richard W Faupel, Sebring, FL (US);
Bethlehem Steel Corporation, , US;
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.