Method and apparatus for cleaning filter material in a filter apparatus utilizing a suction generating nozzle
First Claim
1. A disk filter apparatus for filtering suspended solids from liquid influent, the disk filter apparatus comprising:
- a tank having an inlet for receiving liquid influent and an outlet for filtered effluent;
a disk-shared frame disposed inside said tank and supporting filter material, said filter material having an inlet surface and an outlet surface, wherein liquefied influent can be passed through said filter material in a direction from said inlet surface to said outlet surface; and
a suction generating assembly including a suction generating nozzle having a nozzle inlet, a nozzle outlet, and a suction port in fluid communication with said filter material, the suction port drawing liquid in said tank through said filter material to remove filtered solids from said filter material when operating fluid is passed through said suction generating nozzle in a direction from said nozzle inlet to said nozzle outlet.
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Accused Products
Abstract
A filter cleaning apparatus includes a suction generating assembly having a suction generating nozzle, such as an eductor nozzle. The suction generating nozzle has a nozzle inlet, a nozzle outlet, and a suction port in fluid communication with the filter material. The suction generating assembly also includes a suction member positioned in fluid communication with the suction port and positioned adjacent the influent surface of the filter material. A pump is positioned upstream of the nozzle inlet and in fluid communication, on a suction side, with the filter tank or other liquid source. The pump may be operated to deliver operating fluid from the filter tank so as to pass the operating fluid through the suction generating nozzle in a direction from the nozzle inlet to the nozzle outlet. As a result, liquid in the filter tank is drawn through the filter material in a reverse direction and into the suction member. The liquid stream that results acts to remove filtered solids and biogrowth from the filter material. The liquid stream, filtered solids and biogrowth, are discharged along with the operating fluid through the nozzle outlet.
115 Citations
21 Claims
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1. A disk filter apparatus for filtering suspended solids from liquid influent, the disk filter apparatus comprising:
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a tank having an inlet for receiving liquid influent and an outlet for filtered effluent; a disk-shared frame disposed inside said tank and supporting filter material, said filter material having an inlet surface and an outlet surface, wherein liquefied influent can be passed through said filter material in a direction from said inlet surface to said outlet surface; and a suction generating assembly including a suction generating nozzle having a nozzle inlet, a nozzle outlet, and a suction port in fluid communication with said filter material, the suction port drawing liquid in said tank through said filter material to remove filtered solids from said filter material when operating fluid is passed through said suction generating nozzle in a direction from said nozzle inlet to said nozzle outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of cleaning filter material in a disk filter, the disk filter including a tank having an inlet for receiving liquid influent and an outlet for filtered effluent, the filter material being supported on a disk-shaped frame inside the tank between the inlet and the outlet and for filtering out suspended solids from liquid passed through the filter material as the liquid flows from the inlet to the outlet, the filter material having an inlet surface and an outlet surface, the cleaning method comprising the steps of:
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providing a suction generating nozzle having a nozzle inlet, a nozzle outlet, and a suction port; positioning the suction port of the suction generating nozzle in fluid communication with the filter material; passing operating fluid through the suction generating nozzle in a direction from the nozzle inlet to the nozzle outlet so as to draw liquid in the tank through the filter material and into the suction port to remove filtered solids from the filter material; and
discharging the liquid and the filtered solids through the nozzle outlet with the operating fluid. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A cleaning apparatus in a disk filter for removing filtered solids from filter material, wherein the disk filter includes a tank having an inlet for receiving liquid influent and an outlet for filtered effluent, the filter material being supported on a disk-shaped frame inside the tank between the inlet and the outlet and for filtering out suspended solids from liquid passed through the filter material as the liquid flows from the inlet to the outlet, the filter material having an inlet surface and an outlet surface, the cleaning apparatus comprising:
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a suction generating nozzle having a nozzle inlet, a nozzle outlet, and a suction port; and a suction member in fluid communication with said suction port and positionable adjacent the filter material, said suction member drawing liquid through the filter material to remove filtered solids from the filter material when operating fluid is passed through said suction generating nozzle in a direction from said nozzle inlet to said nozzle outlet. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification