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 Spiral furnace support tube strap

Details
Inventors: Phelps, Sr., Calvin E.;
Assignee: The Babcock & Wilcox Company (New Orleans, LA)
Primary Examiner: Lo; Weilun
Assistant Examiner:
Attorney, Agent or Firm: Edwards; Robert J., Hoelter; Michael L.

A method of supporting the spiral boiler tubing that surrounds a portion of the furnace or combustion area of a steam generator. This method of support eliminates the need to weld plate to the outside of the boiler tubing thereby increasing the mass of the boiler tubing which will result in the creation of temperature differentials within the spiral tubing. In accordance with this invention, a plurality of support members are inserted within and alongside the regular spiral tubing forming a part of the furnace enclosure. These support members are periodically removed from within the plane of this furnace enclosure and re-positioned to another (usually more elevated) position within the furnace enclosure. As the support members near the top of the spiral tubing (which is also the transition from the spiral tubing to more vertically aligned tubing), these support members are secured to this vertical tubing thereby transferring the loading of the spiral tubing to the vertical tubing. In other embodiments, it may be desirable to transfer the loading to other support members such as boiler top support steel.

DETAILED DESCRIPTION A method of supporting the spiral boiler tubing that surrounds a portion of the furnace or combustion area of a steam generator.
This method consists of the steps of securing a plurality of elongated support members parallel to and co-planer with a series of upwardly spiraling elongated tubular members.
These upwardly spiraling elongated tubular members are formed or configured to surround a portion of the furnace or combustion area of the steam generator.
The combination of these support members and tubular members define a spiral tubular furnace enclosure.
Periodically, a first support member is removed from within the spiral tubular furnace enclosure at a first location and re-positioned to a second location within the spiral tubular furnace enclosure.
Furthermore, a second support member is inserted within the spiral tubular furnace enclosure at this first location where the first support member was removed from the spiral tubular furnace enclosure.
Finally, these support members are secured to an upper region of the steam generator.


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