초록 ▼

A filter device for removing contaminants from liquid flowing therethrough comprising a vessel having an inlet for providing a contaminated liquid flow into the interior thereof and an outlet through which filtered liquid can exit the vessel. A screen means contained within the vessel supports a fil

A filter device for removing contaminants from liquid flowing therethrough comprising a vessel having an inlet for providing a contaminated liquid flow into the interior thereof and an outlet through which filtered liquid can exit the vessel. A screen means contained within the vessel supports a filter media thereon. A pump has a suction and discharge located within the vessel and respective to the screen whereby the filter media can be fluidized and thereby cleaned without removing the media from the vessel. The scrubbing action transfers the contaminants from the filter media into the scrub water and thereby enables the contaminants to be removed from the vessel by discharging the scrub water therefrom.

대표청구항 ▼

Method of removing suspended contaminants from a liquid comprising the steps of: (1) arranging a screen means within the interior of a vessel to divide the vessel into chambers; (2) partially filling the interior of the vessel with a filter media which is located upstream of said screen means; said

Method of removing suspended contaminants from a liquid comprising the steps of: (1) arranging a screen means within the interior of a vessel to divide the vessel into chambers; (2) partially filling the interior of the vessel with a filter media which is located upstream of said screen means; said media being made of individual pieces of filter material having an average size which is greater than the size of the openings in said screen means; (3) carrying out a filtration step by flowing liquid containing suspended contaminants therein into the upper end of the vessel and forcing the liquid to flow through the media, through the screen means, and then away from the vessel, thereby removing a significant quantity of the contaminants from the liquid and depositing the removed contaminants onto the media; (4) carrying out a fluidization step by discontinuing step (3) and then scrubbing a substantial quantity of the deposited contaminants from the media by flowing a relatively large stream of the liquid contained within the vessel along a flow path within the vessel to cause the media to become fluidized and suspended within the liquid, and which thereby transfers the contaminants from the media into the liquid; (5) carrying out a discharge step by flowing the contaminants laden liquid through said screen means and along the same flow path followed during step (3) while circulating relatively clean liquid through the vessel; (6) setting the scrubbed media to the location upstream of the screen means; (7) normalizing the filter bed by circulating relatively clean liquid through the vessel; (8) and than resuming the filterng operation of step (3).