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Macmet's Debris Filter to protect Heat Transfer equipment

Macmet supplies debris filters for protecting the heat transfer equipment against small to medium size wastes that may have passed through upstream screens.

The Debris Filter is capable of handling various forms of debris/sludge i.e. suspended particles/matter, mussels, grass, leaves, wood pieces, etc. The strainer effectively prevents fouling by capturing and ejecting all debris in an optimal manner. The optimal cleaning capability is achieved through the incorporation of dedicated suction ports for the two basic classes of debris - coarse and fibrous.

When fouling creates the critical predetermined pressure across the filter, the backwash/debris evacuation sequence is initiated. The valve on the debris evacuation pipe automatically opens and the evacuation rotor is actuated. The differential pressure at the portals creates the vacuum by which all the debris is evacuated. The rotor continues to clean the filter until allowable differential pressure exists. The rotor then is automatically stopped and the valve on the evacuation is closed.

Equipment description:

The filter body/housing is a fabricated unit complete with filter membrane assembly, flanged inlet, outlet, debris discharge opening, pressure measuring tapping, etc.

The filter membrane is cone shaped with inlet water entering on the concave side. A Debris evacuation rotor is located on the inlet side which features several slotted suction ports for removing fibrous material and other debris captured by the filter. A broader suction portion is located at the top of the rotor to extract larger, coarse and marine type particulate. The slotted ports have flexible sealing lips, which concentrates suction on the filter surface directly at the point of treatment. Because of oblique mounting of these ports and their rotation, the larger particulate is conveyed to the top suction port of evacuation. The debris discharge/evacuation pipe is opened or closed by the discharge valve. A differential pressure measuring system with a limiting contact continuously assesses the degree of fouling on the filter and controls the actuation of the rotor and debris discharge valve.