Damper system for heater stack
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United States of America
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Sep 10, 2019
Grant Date -
Jul 13, 2017
app pub date -
Jan 7, 2016
filing date -
Jan 7, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
In a stack leading from a fired heater, a plurality of damper blades are positioned at a longitudinal location, each blade being at least partly rotatable around its longitudinal axis to regulate flow through the stack. A plurality of controllers is operatively associated with the plurality of parallel blades to effect rotation of the blades. At least one of the controllers is decoupled from the rest of the plurality of controllers and used to independently control at least one but not all of the plurality of damper blades. The damper blades can be parallel or opposed.
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