Patent ID: 9476643
Filing Date: 2016-10-25
CPC Classification: A21B,A23B,A23L,F26B,Y02P

Claim Text:
1. A method of recycling waste treatment air used in a heat recovery system having a preheating zone and a downstream oven zone of an oven for creating a preheating air to preheat a product in process prior to entering the downstream oven zone, the downstream oven zone having a zone outlet and a zone inlet, the preheating zone having a preheating inlet and a preheating outlet, the method comprising the steps of: exhausting a waste treatment air through an oven duct assembly secured to the zone outlet in the downstream oven zone following a treatment of a product in process; transferring at least a portion of the waste treatment air from the zone outlet to the zone inlet; transferring a portion of the waste treatment air through a transfer duct extending between the oven duct assembly and the preheating zone; conditioning the waste treatment air to create a preheating air having a preheating air temperature and a preheating air dew point temperature; introducing the preheating air into the preheating zone through the preheating inlet to preheat additional product in process; exhausting a waste preheating air through the preheating outlet in the preheating zone following the preheating of the product in process; and connecting the preheating outlet to the preheating inlet with a preheating duct assembly to transfer at least a portion of the waste preheating air from the preheating outlet to the preheating inlet, and conditioning the at least a portion of the waste preheating air for creating a new preheating air to preheat additional product in process.