Heat exchange – Regenerator – Cleaning
Patent
1988-02-10
1989-07-25
Davis, Jr., Albert W.
Heat exchange
Regenerator
Cleaning
134 46, 134172, F28D 1700, F28G 900
Patent
active
048504238
ABSTRACT:
An air preheater water jet apparatus is provided for cleaning fly ash, soot and the like from a rotating or stationary heat exchange basket on a air preheater used to improve the efficiency of a boiler in an electric utility generating plant. The air preheater cleaning apparatus includes a cleaning assembly with water jet nozzles, thereon, attached to a carriage which moves along a track, such as a channel beam, affixed radially above and adjacent to the air preheater basket. A drive assembly and an idler bracket assembly with a roller chain therebetween are disposed on the channel beam. The carriage assembly is attached to the roller chain and as the carriage is driven, the cleaning assembly is moved along the channel beam. Thus, when the basket, or the air preheater cleaning apparatus, is rotated and the carriage is moved inward, a circular path of the basket is cleaned. Additionally, a variable speed motor control apparatus is used to increase the air preheater rotational speed as the carriage assembly moves inward, such that the relative speed between the cleaning assembly and the air preheater basket remains constant as inward movement occurs.
REFERENCES:
patent: 2761653 (1956-09-01), Grames et al.
patent: 3985161 (1976-10-01), Nelson
patent: 4041899 (1977-08-01), Wolfe et al.
patent: 4256511 (1981-03-01), Atchison et al.
patent: 4466572 (1984-08-01), Shelton
patent: 4503811 (1985-03-01), Hammond
Weatherford Sales Brochure, Air Preheater Cleaning System, Sections 1, II, V.
Allen John T.
Cogbill Randall B.
Pitts Alan J.
Roberts Don M.
Davis Jr. Albert W.
Halliburton Company
McBurney Mark E.
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