Liquid processing media bed drain system
AssigneeCombustion Engineering, Inc.
InventorCharles Robert Ferrin
Life of this patent
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Abstract
A bed of granular media is supported in a vessel to process liquid flowed in through both the upper and lower faces of the bed and out of the bed at a location intermediate the upper and lower faces. A drain structure for the processed liquid is mounted at the location intermediate the two bed faces with the capacity to withdraw the quantity of liquid flowing into both of the bed faces. A closed circuit is provided to transfer residual material in the drain structure back to the inlet system of the bed after backwash of the bed. A holding vessel is connected to the vessel in which the media bed is supported to temporarily receive the media for service periods of the bed vessel.
Claims5
A fluid processing unit, including,
- a vessel in which fluid is processed by being passed through granular media;
- a bed of granular media mounted in the vessel so as to provide horizontal and parallel faces vertically spaced from each other through which fluid to be processed is passed into the bed for processing,
- inlet conduits mounted through the wall of the vessel and positioned relative to the upper and lower faces of the bed so as to direct fluid to be processed through each face at the same time;
- a source of fluid to be processed by the bed of granular media;
- a pump connected between the source and inlet connections to deliver fluid to be processed to the bed faces and through both bed faces and into the bed;
- a drain structure mounted in the vessel and intermediate the bed faces and within the bed and extending horizontally across the bed and comprising;
- an elongated chamber orientated to extend horizontally across the bed, and having a chamber thickness substantially smaller than its vertical width to thereby provide a relatively small profile to the vertical movement of the media bed within the vessel, said elongated chamber having spaced holes in its wall through which fluid processed by the bed is received into the chamber;
- an an outlet conduit connected to communicate to the chamber to remove the processed fluid from the vessel.
Dependencies are inferred from the claim text.