Multiple Rate Filter Underdrain Lateral Gas Metering Plate
AssigneeXylem Water Solutions Zelienople LLC
InventorsDean T. Berkebile, John L. Geibel, Ivan Xuetang Zhu
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Abstract
A filtration system has at least one underdrain lateral, a flume, and at least one metering plate. The metering plate includes a plate member with at least one opening configured to receive liquid or gas therethrough at a first flow rate during a backwash function and is configured to receive liquid or gas therethrough at a second, lower flow rate during filtration. A method of metering gas into a filtration system with a metering plate is also disclosed. The metering plate allows gas to flow into each underdrain lateral at two very different flow rates.
Claims20
A filtration system comprising:
- at least one underdrain lateral comprising a plurality of underdrain blocks;
- a flume;
- and
- at least one metering plate positioned between the at least one underdrain lateral and the flume, each metering plate comprising a plate member, the plate member comprising at least one opening,
- wherein at least one opening is configured to receive liquid or gas therethrough at a first flow rate during a backwash function and at least one opening is configured to receive liquid or gas therethrough at a second, lower flow rate during filtration.
A metering plate comprising:
- a plate member comprising at least one opening,
- wherein at least one opening is configured to receive liquid or gas therethrough at a first flow rate during a backwash function and at least one opening is configured to receive liquid or gas therethrough at a second, lower flow rate during filtration.
- wherein the metering plate is configured to be positioned in a filtration system between a flume and an underdrain lateral, the underdrain lateral comprising at least one underdrain block.
A method of metering gas into a filtration system at a plurality of flow rates comprising:
- positioning at least one metering plate between at least one underdrain lateral and a flume, each metering plate comprising a plate member, the plate member comprising at least one opening, wherein at least one opening is configured to receive liquid or gas therethrough at a first flow rate during a backwash function and is configured to receive liquid or gas therethrough at a second, lower flow rate during filtration;
- filtering liquid or gas through the filtration system;
- and
- backwashing the filtration system using liquid or gas.
Dependencies are inferred from the claim text.