Switching valve seal
AssigneeMegtec Systems, Inc.
InventorJames T. Cash
Life of this patent
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Abstract
Switching valve utilizing a rotatable seal suitable for use in a regenerative thermal oxidizer, and oxidizer including the switching valve. The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. The valve has a seal plate that defines two chambers, each chamber being a flow port that leads to one of two regenerative beds of the oxidizer. The valve also includes a switching flow distributor that provides alternate channeling of the inlet or outlet process gas to each half of the seal plate. The valve operates between two modes: a stationary mode and a valve movement mode. In the stationary mode, a tight gas seal is used to minimize or prevent process gas leakage. The gas seal also seals during valve movement.
Claims8
A regenerative thermal oxidizer for processing a gas, comprising:
- a combustion zone;
- a first heat exchange bed containing heat exchange media and in communication with said combustion zone;
- a second heat exchange bed containing heat exchange media and in communication with said combustion zone;
- a rotatable switch valve for alternating the flow of said gas between said first and second heat exchange beds, said rotatable switch valve comprising a radial duct enclosed by an outer housing, a retaining ring coupled to said rotatable switch valve, a mounting ring coupled to said rotatable switch valve and spaced from said retaining ring, and a ring seal between said retaining ring and said mounting ring and in fluid communication with said radial duct, said ring seal having a bore adapted to allow gas flow to or from said radial duct and form a pressurized seal with said outer housing.
Dependencies are inferred from the claim text.