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Decanter centrifuge with adjustable gate control

  • US 5,643,169 A
  • Filed: 06/06/1995
  • Issued: 07/01/1997
  • Est. Priority Date: 06/06/1995
  • Status: Expired due to Fees
First Claim
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1. A decanter centrifuge comprising:

  • a bowl rotatable about a longitudinal axis, said bowl having a cake discharge opening at one end and a liquid phase discharge opening;

    a conveyor having at least a portion disposed inside said bowl for rotation about said longitudinal axis at an angular speed different from an angular rotational speed of said bowl, said conveyor including a helical screw disposed inside said bowl for scrolling a deposited solids cake layer along an inner surface of said bowl towards said cake discharge opening, said helical screw including a plurality of screw wraps, said screw wraps including a last screw wrap which is most proximate to said cake discharge opening, said screw wraps further including a penultimate screw wrap disposed next to said last screw wrap on a side thereof opposite said cake discharge opening;

    a feed element extending into said bowl and said conveyor for delivering a feed slurry into a pool inside said bowl; and

    an adjustable gating element mounted to said conveyor between said penultimate screw wrap and said cake discharge opening, said gating element being spaced a variable and adjustable predeterminable distance from said inner surface of said bowl.

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