F - Mech Eng,Light,Heat,Weapons – 22 – B
Patent
F - Mech Eng,Light,Heat,Weapons
22
B
257/1, 122/13
F22B 37/52 (2006.01) F22B 37/48 (2006.01) F28G 3/16 (2006.01) F28G 9/00 (2006.01)
Patent
CA 1199022
APPARATUS AND METHOD FOR SOOT CLEANING IN THE HIGH-PRESSURE HEAT EXCHANGERS Abstract of the Disclosure 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 is 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 ex- changer. 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.
431247
Deltak Corporation
Fetherstonhaugh & Co.
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