Continuous Dewatering Recirculation System with Integral Coal Combustion Residual High Flow Plate Separator
AssigneeUnited Conveyor Corporation
InventorsDaniel Charhut, Ronald Bugar, Saurabh Rastogi, Kenneth Lauridsen
Life of this patent
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Abstract
The system for a continuous dewatering recirculating for removing particulate such as coal combustion residue from a water stream. The system includes multiple dewatering and recirculation containers, each having a submerged flight conveyor and lamella settlings plate located therein, at least one dewatering and recirculation container receives ash water stream overflow.
Claims17
A system for reducing the particulate in a bottom ash water stream comprising:
- a) A plurality of continuous dewatering and recirculation containers, each of the plurality of continuous dewatering and recirculation containers containing a submerged flight conveyor therein, with at least one of the plurality of continuous dewatering and recirculation containers receiving coal combustion residue water stream overflow from another of the plurality of continuous dewatering and recirculation containers;
- b) At least one lamella settling plate located within each of the plurality of continuous dewatering and recirculation containers;
- and
- c) A control unit for selecting at least one continuous dewatering and recirculation container from among the plurality of continuous dewatering and recirculation containers for receiving ash water stream overflow.
A system for reducing the particulate in a coal combustion residue water stream of at least 2000 gallons per minute comprising:
- a) At least one continuous dewatering and recirculation container for receiving the coal combustion residue water stream;
- b) At least one variable water level surge tank operatively connected to the at least one continuous dewatering and recirculation container so as to maintain a substantially constant water level therein for filtering the coal combustion residue water stream;
- c) A plurality of lamella settling plates located within the continuous dewatering and recirculation containers for filtering the coal combustion residue water stream,
- wherein the flow of the coal combustion residue water stream, the number and geometry of plates in the plurality of lamella settling plates generates a Reynolds number within the plurality of lamella settling plates of at least 500.
A continuous dewatering and recirculation system for reducing the particulate in a coal combustion residue water stream of at least 2000 gallons per minute comprising:
- a) A first and second container operatively connected to one another for receiving the coal combustion residue water stream, wherein the second container is capable of both secondarily filtering particulate in a coal combustion residue water stream, and maintaining a substantially constant water level in the first container for filtering the coal combustion residue water stream, and the first and second containers may be switched in operation such that the first container is capable of maintaining a substantially constant water level in the second container for filtering the coal combustion residue water stream;
- b) A conveyor system in the each of the first and second container for dewatering and removing settled particulate therefrom;
- and
- c) A plurality of lamella settling plates located within each of the first and second continuous dewatering and recirculation containers for filtering the coal combustion residue water stream,
- wherein the flow of the coal combustion residue water stream, the number and geometry of plates in the plurality of lamella settling plates generates a Reynolds number within the plurality of lamella settling plates of at least 500.
Dependencies are inferred from the claim text.