Advanced sootblower nozzle design

Details Advanced sootblower nozzle design Advanced sootblower nozzle design

1994-02-14

1996-09-10

Weldon, Kevin P.

Fluid sprinkling, spraying, and diffusing

Processes

239450, 239566, 239DIG13, 239590, 122391, F22B 3754

Patent

active

055537782

ABSTRACT:
A nozzle suitable for use with a device for removal of deposits from contaminated surfaces, such as a sootblower in a heat recovery boiler, is designed to avoid normal shock wave formation, and hence energy dissipation, by achieving a condition whereby, the emergent steam pressure (p.sub.e) is related to the ambient pressure (p.sub.oo) by the relationship p.sub.e /p.sub.oo <about 2, preferably about 1. A compact design achieving this result and able to function over a wide range of flow rates comprises a cylindrical body with a downstream convergent outlet and a rounded-head conical insert located axially in the body with its maximum dimension generally coinciding with the commencement of convergence of the outlet and extending through the outlet.

REFERENCES:
patent: 837934 (1906-12-01), Kerr
patent: 1242359 (1917-10-01), McKenna
patent: 1377622 (1921-05-01), Henry
patent: 1930515 (1933-10-01), Eby
patent: 3528704 (1970-09-01), Johnson
patent: 4014961 (1977-03-01), Popov
patent: 4261516 (1981-04-01), Tillman
patent: 4565324 (1986-01-01), Rebula et al.
patent: 5050805 (1991-09-01), Llyod et al.
patent: 5271356 (1993-12-01), Kling et al.

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