Primary & Secondary Clarification: Suction Header Clarifier
MultiDraw Suction Nozzle Collectors, Type RSMTP and RSM Series
An alternate to the SightWell method of rapid sludge removal is the Walker Process MultiDraw, a multiple suction nozzle-type collector. The MultiDraw can be furnished in either bridge-supported (Type SC) or pier-supported (Type RSM) designs. Sludge suction pipe arms, V-plows and a manifold assembly enable sludge to be "vacuumed" off the tank floor over the full length of each pipe arm.
Suction is provided directly from the sludge pumps to the sludge manifold centrally located at the tank bottom. Two pipe arms projecting from the center manifold are fitted with a limited number of suction nozzles. The number of nozzles are specifically designed for each application so that nozzle openings are large, yet maintain sufficient suction volume (velocity) to prevent nozzle clogging, thus ensuring uniform sludge distribution to each nozzle.
Nozzles with V-plows are arranged along the length of each arm so that sludge removal occurs across the full floor area. The sludge that is collected then moves inside the pipe arms to the center manifold and exits to the sludge withdrawal system.
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