Rappable steam generator tube bank

Details Rappable steam generator tube bank Rappable steam generator tube bank

1994-12-07

1996-09-10

Bennett, Henry A.

Liquid heaters and vaporizers

Cleaning

122393, 165 84, 165 95, F22B 3718

Patent

active

055535712

ABSTRACT:
An apparatus and method of operating a steam generator tube bank are disclosed in which a water drum of a typical steam drum/water drum combination is replaced with a plurality of smaller readers to permit the use of rapping, or mechanical rappers, to clean the tubes extending between the steam drum and the headers. The steam generator tube bank of the present invention comprises a steam drum or collecting header, a plurality of headers extending below the steam drum, and a plurality of tubes extending between the steam drum and the headers and placing the steam drum and headers in fluid flow communication. The headers are sized to permit debris or deposits which accumulate on the tubes to be removed by rapping the headers, thereby inducing vibration of the headers and the tubes. The tubes are arranged in rows, and the headers are arranged to form rows of axially-aligned pairs of headers. A mechanical rapper is associated with each header to periodically strike the header and induce vibration of the header and tubes connected thereto to remove debris and deposits which may have accumulated on the tubes.

REFERENCES:
patent: 600059 (1898-03-01), Brady
patent: 3997000 (1976-12-01), Piela
patent: 4294200 (1981-10-01), Gorzegno
patent: 4301771 (1981-11-01), Jukkola et al.
patent: 4442880 (1984-04-01), Seifert et al.
patent: 4809625 (1989-03-01), Garcia-Mallol et al.
patent: 4836146 (1989-06-01), Russel et al.
patent: 4878654 (1989-11-01), Carminati et al.
patent: 4888158 (1989-12-01), Downs
patent: 5315966 (1994-05-01), Gamache et al.

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