The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1983
Filed:
Sep. 07, 1982
Robert J Krowech, Minneapolis, MN (US);
Deltak Corporation, Minneapolis, MN (US);
Abstract
A valve-controlled pneumatic actuator is used to actuate a movable cleaning head to remove soot, ash or other sediment from tubes, headers and other internal parts of a heat exchanger of the type used in coal gasification plants. A rotary sootblower tube is coupled to a stationary inlet tube in a chamber of the heat exchanger vessel where a hot, highly pressurized and dirty gas circulates. Both the actuator and the stationary inlet tube are fixed to the vessel so that seals for moving parts are avoided. In one embodiment, the blowing tube extends in the inlet tube to a free end, and in another embodiment the opposite end is mounted to rotate around a stub tube. The blowing medium is provided in a jet or blast through nozzles in the blowing tube to loosen soot in the internal parts of the heat exchanger. The blowing medium is also used to power the actuator. In another embodiment a rapper head is carried by an actuator shaft, and an actuator piston is moved through a rapid stroke to strike a lower header and loosen accumulated deposits with the resulting vibrations.