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Mechanical Conveying-old Q&A

  •   We are evaluating whether drying our waste treatment sludge from a filter press is the right thing to do. We have selected a Jmate Dryer to do the job. The dryer pushes the sludge cake through a plate, creating pellets of wet sludge to a metal belt. The dryer then uses natural gas to dry the sludge to hard pellets with a discharge temperature around 500ºF. From the dryer, at 50 in. off the floor, we need to move these pellets out to a metal roll-off container 7 ft high and 24 ft long, and fill it from back to front using a conveying system. What would be the best conveying system to use? We are trying to do this inexpensively since we don’t care if the pellets get damaged, but we don’t want a dust storm at the roll-off either, or blowing dust from the roll off when it is on the road.

    Answered October 2nd, 2009 by Expert: Matt Mayo

    Given your parameters, I would recommend a screw conveyor with a method for partial discharge along the length of the roll-off container. Simple holes with partial covers set manually is one method to discharge over a long length.

    There are telescoping belt conveyors that would give more distribution options, but I believe that they would be more expensive.

    A vibrating conveyor would work well with lower maintenance, but elevating and support would be uneconomical factors.

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