Sootblower
AssigneeABB Air Preheater, Inc.
InventorsBarry E. Campbell, Harlan E. Finnemore
Life of this patent
Estimating the term…
Abstract
A swing-arm sootblower for a rotary regenerative air preheater is mounted to sweep across the air preheater rotor at a constant speed or angular velocity. A constant speed motor is attached through a speed reducer to a drive sprocket. A chain drive turns driven sprocket which is connected to the rotatable mounting shaft for the sootblower lance or arm. Limit switches are tripped at the ends of the arc of travel of the lance by a trip arm mounted on the drive sprocket to turn the motor off and to close a valve for the sootblowing medium. The speed of the lance can be adjusted in general or at particular points in the art of travel.
Claims8
A sootblower arrangement for a rotary regenerative air preheater having a heat exchange rotor with a center portion and a peripheral portion and comprising:
- a. a drive motor,
- b. a speed reducer connected to said drive motor including an output shaft,
- c. a rotatable drive means attached to said speed reducer output shaft rotatable at a constant speed proportional to the speed of said drive motor,
- d. a rotatable driven means connected to an oscillatable swivel shaft,
- e. means for driving said rotatable driven means and said oscillatable swivel shaft from said rotatable drive means at a constant speed proportional to the speed of said rotatable drive means,
- f. a sootblower arm attached to said oscillating swivel shaft, said sootblower arm extending over a portion of said heat exchange rotor and adapted to swing through an arc extending between an end point adjacent said center portion of said rotor and an end point adjacent said peripheral portion of said rotor, and
- g. means for turning said drive motor off as said sootblower arm reaches one of said end points of said arc.
Dependencies are inferred from the claim text.