Switching valve and a regenerative thermal oxidizer...

F - Mech Eng,Light,Heat,Weapons – 27 – D

Patent

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Details

F27D 17/00 (2006.01) F23G 7/06 (2006.01) F23L 15/02 (2006.01) F27D 7/02 (2006.01)

Patent

CA 2407230

Switching valve and a regenerative thermal oxidizer (10) including the switching valve (20). The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. The valve (20) has a seal plate (100) that defines two chambers (25), each chamber being a flow port that leads to one of two regenerative beds of the oxidizer (10). The valve also includes a switching flow distributor (50) which provides alternate channeling of the inlet or outlet process gas to each half of the seal plate (100). 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.

L'invention concerne une vanne d'aiguillage et un réacteur d'oxydation thermique régénérateur (10) comprenant ladite vanne d'aiguillage (20). Selon la présente invention, la vanne présente d'excellentes caractéristiques d'étanchéité et minimise l'usure. Cette vanne (20) comprend une plaque d'étanchéité (100) définissant deux chambres (25), chaque chambre étant une voie d'écoulement conduisant à un des deux lits de régénération du réacteur d'oxydation (10), et un distributeur de flux d'aiguillage (50) permettant un acheminement alterné du gaz utilisé d'entrée ou de sortie vers chaque moitié de la plaque d'étanchéité (100). Ladite vanne fonctionne selon deux modes : un mode stationnaire et un mode mouvement. En mode stationnaire, on utilise un joint étanche au gaz pour minimiser ou prévenir toute fuite de gaz utilisé. Le joint au gaz assure également une étanchéité pendant le mouvement de la vanne.

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