Heating – Processes of heating or heater operation – Continous strip – strand or web passed longitudinally through...
Patent
1985-09-09
1987-05-05
Wayner, William E.
Heating
Processes of heating or heater operation
Continous strip, strand or web passed longitudinally through...
432 59, 432 72, 34 29, 34 34, 34 46, 34 54, 34212, 34242, F26B 1300, F27B 928
Patent
active
046628401
ABSTRACT:
An indirect fired oven system for curing coated products, particularly metal product such as coiled sheet steel or coiled sheet aluminum, is provided. The oven line comprises at least one oven zone though usually at least two or three zones are present, through which the coated product travels, and the oven line is operated at elevated temperatures. An indraft is induced at the entrance and exit ends of the oven line by a balance air fan which captures the indraft air at both ends almost immediately that it enters the oven line, and feeds part of the indraft air to a heat exchanger and then back to the oven zones, and part of it unheated directly back to the oven zones. The temperature in the oven zones is controlled by the influx to each zone of heated air. An exhaust fan is arranged to exhaust the oven zones including the volatile solvent released from the coating material as it heats up for curing in the oven; and the output from the exhaust fan is fed to an afterburner for combustion after which it flows through the heat exchanger and then to an exhaust stack. No products of combustion are therefore fed directly to the oven line or are in contact with the coated product as it moves through the oven.
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Hewson Donald E.
Hunter Engineering (Canada) Ltd.
Wayner William E.
Westphal David W.
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