Woodchip drying system for drying wood chip and associated...

F - Mech Eng,Light,Heat,Weapons – 26 – B

Patent

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F26B 23/02 (2006.01)

Patent

CA 2753123

The invention relates to a wood chip drying system for drying wood chip (18) comprising a furnace (12), a drier (16) for the wood chip (18) and a recirculation apparatus (56) for the recirculation of exhaust vapors (34) into the drier (16), wherein the recirculation apparatus (56) has an exhaust vapor heater (42), and wherein the wood chip drying system (10) is designed to reduce organic compounds present in the exhaust vapor (34) prior to the recirculation into the drier (16). The exhaust vapor heater (42) comprises a regenerative and/or catalytic heat exchanger which is arranged downstream after the drier (16) and which is designed so as to heat up the exhaust vapor (34) to a temperature which is high enough to oxidize at least a majority of particles present in the exhaust vapor (34).

La présente invention concerne une installation de séchage de copeaux de bois (18), dotée d'un chauffage (12), d'un séchoir (16) pour les copeaux de bois (18) et d'un dispositif de renvoi (56) pour renvoyer la vapeur (34) dans le séchoir (16), le dispositif de renvoi (56) comportant un réchauffeur de vapeur (42) et l'installation de séchage de copeaux de bois (10) étant conçue pour réduire des combinaisons organiques présentes dans la vapeur (34) avant son renvoi dans le séchoir (16). Le réchauffeur de vapeur (42) comporte un échangeur de chaleur à régénération et/ou catalytique qui est disposé derrière le séchoir (16), côté aval, et qui est conçu pour réchauffer la vapeur (34) à une température telle qu'au moins la majeure partie des particules présentes dans la vapeur (34) est oxydée.

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