Furnace wall structure

Details Furnace wall structure Furnace wall structure

2006-07-11

2006-07-11

Rinehart, Kenneth (Department: 3749)

Furnaces

Wall structure

C122S467000, C122S510000

Reexamination Certificate

active

07073451

ABSTRACT:
A furnace wall comprises: a furnace wall bottom part composed of furnace wall tubes having upward-spiraled fluid passages; a nose part which has nose wall tubes disposed in a middle part of a furnace rear wall adjoining the furnace wall bottom part; and a screen part having screen tubes, wherein the terminal parts of the furnace wall tubes are located lower than the nose part. Consequently, the drain generated in the nose wall tubes while the operation of the boiler is suspended can naturally fall inside the furnace wall tubes located lower than the nose part, and in a case where the header is connected with the terminal parts of the furnace wall tubes, the drain generated in the nose wall tubes can naturally fall inside the header. In addition, the furnace wall tubes which extend upright from the terminal parts of the furnace wall tubes can be provided to connect parts of the furnace wall tubes directly with the header, to connect the header with the nose wall tubes via vertical tubes and; and to connect other parts of the furnace wall tubes directly with the screen tubes, thereby integrating the vertical furnace wall tubes, the vertical tubes, and the screen tubes by being welded via membrane bars. This results in the furnace wall structure not requiring reinforcing supports for supporting the weight of the furnace wall bottom part.

REFERENCES:
patent: 2719210 (1955-09-01), Chapman
patent: 3434460 (1969-03-01), Schroedter
patent: 3927646 (1975-12-01), Dungey et al.
patent: 4075979 (1978-02-01), Michel
patent: 4864973 (1989-09-01), Lieb et al.
patent: 5950574 (1999-09-01), Matsuda et al.
patent: 6651596 (2003-11-01), Wittchow
patent: 61-23004 (1986-02-01), None
patent: 2000-130701 (2000-05-01), None
patent: 2000-186801 (2000-07-01), None
patent: 2001-525050 (2001-12-01), None
patent: 98/51964 (1998-11-01), None
English Language Abstract of JP 2001-525050.
English Language Abstract of JP 2000-186801.
English Language Abstract of JP 61-23004.
English Language Abstract of JP 2000-130701.

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