Furnace blower with external gas recycling for the reduction of

Details Furnace blower with external gas recycling for the reduction of Furnace blower with external gas recycling for the reduction of

1989-04-04

1990-05-22

Favors, Edward G.

Furnaces

Combined

With boiler

110204, 431115, F23B 700

Patent

active

049267655

ABSTRACT:
A furnace system is provided with exhaust gas recirculation via a recirculation tube having an inlet mounted downstream of the furnace firing area and an inlet disposed in juxtaposition to the blower fan wheel of the furnace blower. The recirculated gases can enter the tube from either the stack or the firebox. The inlet penetrates the air intake plenum either axially thereof or at an angle thereto through a sidewall. The furnace includes both an air intake throttle and an air intake butterfly control valve. An exhaust gas recirculation control valve can be linked to the air intake control butterfly valve for their operation in concert. The air intake throttle is either a rigid baffle or a pivotable flap.

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