Conveyor/Compactor Keeps Screenings from Clogging Plant

ScrewpactorHD from Headworks
Conveyor/Compactor Keeps  Screenings from Clogging Plant

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The ScrewpactorHD heavy-duty shafted spiral conveyor/compactor from Headworks can bust, crush and tear up materials such as fired clay brick, blocks of oak, baseball bats, beverage cans and bottles, tires, traffic cones and buckets of gravel.

“This is a little more heavy-duty to handle things in wastewater that wouldn’t be considered typical screenings, like rocks, bricks, pieces of wood and irregular-shaped objects that are difficult to convey,” says Wayne McCauley, senior projects and special projects manager. “It takes those materials and breaks them when necessary into smaller pieces.”

McCauley says one problem treatment plants face, especially those with older collection systems, is inorganic solids entering the system, or pieces of the system itself, such as a brick-lined sewer, breaking down and getting caught. “At some point you need to retrieve and dispose of it,” he says.

The low-profile conveyor/compactor (about 6 feet long and 3 feet wide) can handle about 105 cubic feet per hour and is easily retrofitted to existing systems. Solids are fed directly into the shafted spiral from one or two bar screens and then conveyed through the wash zone on the way to the press zone where they are dewatered and compacted. A trumpet-shaped discharge tube provides additional dewatering and directs solids to a roll-off container.

Below the drain section, a U-trough with quick-release clamps collects the presswater. Two rotary shaft seals keep the presswater inside and away from the greasable axial thrust bearing and drive. When an overload is detected, the unit shuts down and an alarm is sent.

The unit is manufactured from grade 304 or 316 stainless steel, and the spiral shaft is made of alloy steel. System maintenance is minimal, mainly limited to the wear bars and the gear reducer, which typically requires an annual oil change. Options include a screenings washing system that loosens and emulsifies organic material on the screenings and a continuous bagging module that collects screenings. 713/647-6667;


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