Protected coils for a steam generator

Details Protected coils for a steam generator Protected coils for a steam generator

1992-12-03

1994-04-12

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

34 57A, 110245, 122 4D, 16510416, 1651341, 208113, 208120, 422201, F27B 1516, B01J 826

Patent

active

053023528

ABSTRACT:
In a steam generator for recovering heat in a hot fluidized bed of solid particles, wherein generally horizontally oriented coils of the steam generator make a 180.degree. U-bend, the U-bend portion of the coils are protected from overheating by installing an open top insulating box around the U-bend portion of the coil. In use solid particles from the circulating fluidized bed accumulate in the insulating box thus providing a non-moving layer of solid particles surrounding the U-bend which thermally insulates the U-bend portion of the coil from the higher temperature encountered in the moving fluidized bed.

REFERENCES:
patent: 2819951 (1958-01-01), Medlin et al.
patent: 2847366 (1958-08-01), Boisture et al.
patent: 3983927 (1976-10-01), Stewer et al.
patent: 4407355 (1983-10-01), Bonn et al.
patent: 4563267 (1986-01-01), Graham et al.
patent: 4811696 (1989-03-01), Lacquement et al.
patent: 4843050 (1989-06-01), Rahlwes et al.

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