Heat recuperative catalytic oxidation device

A catalytic oxidation assembly comprising, in combination:

• a preheater;
• catalyst means having an inlet duct communicating with said preheater, a hood receiving at least a portion of said inlet duct, a catalyst positioned in said hood and surrounding at least a portion of said inlet duct and forming a catalyst layer between said hood and said inlet duct, and an outlet;
• an ambient air inlet duct connected to said hood so as to provide communication between the ambient and said hood;
• a recirculation duct having an inlet communicating with said catalyst means outlet, and an outlet;
• gas moving means having an inlet, and an outlet;
• means for providing communication between said gas moving means inlet and said recirculation duct outlet, and means for providing communication between said gas moving means outlet and said recirculation duct inlet;
• and
• an ambient air preheat exchanger having first and second passageways in thermal communication with each other, means for providing communication between the ambient and said gas moving means inlet which includes said first passageway, and means for providing communication between said catalytic heat generator means outlet and the ambient which includes said second passageway.

A catalytic oxidation assembly comprising, in combination:

• a preheater;
• catalyst means having an inlet duct communicating with said preheater, a hood receiving at least a portion of said inlet duct, a catalyst positioned in said hood and surrounding at least a portion of said inlet duct and forming a catalyst layer between said hood and said inlet duct, and an outlet;
• an ambient air inlet duct communicating between the ambient and said hood;
• a recirculation duct having an inlet communicating with said catalyst means outlet, and an outlet;
• gas moving means having an inlet, a first outlet, and a second outlet;
• means for providing communication between said gas moving means inlet and said recirculation duct outlet, and means for providing communication between said gas moving means first outlet and said recirculation duct inlet;
• return means communicating between said gas moving means second outlet and said preheater;
• and
• an ambient air preheat exchanger having first and second passageways in thermal communication with each other, means for providing communication between the ambient and said gas moving means inlet which includes said first passageway, and means for providing communication between said catalyst means outlet and the ambient which includes said second passageway.

A catalytic oxidation assembly comprising:

• a stack;
• a recuperative heat generator positioned in said stack comprising:
• plate positioned in and extending across said stack;
• an inlet duct passing through said plate;
• a hood receiving at least a portion of said inlet duct;
• a catalyst positioned in said hood and surrounding at least a portion of said inlet duct and forming a catalyst layer between said hood and said inlet duct;
• an ambient inlet duct connected to said hood for providing communication between the ambient and said hood;
• and
• an outlet;
• and
• an ambient air preheat exchanger having first and second passageways in thermal communication with each other, means for providing communication between the ambient and said duct passing through said plate which includes said first passageway, and means for providing communication between said catalytic heat generator means outlet and the ambient which includes said second passageway.