Liquid heaters and vaporizers – Industrial – Port
Patent
1982-07-30
1984-06-12
Yuen, Henry C.
Liquid heaters and vaporizers
Industrial
Port
122 13R, 122155A, 122235A, 165156, 165180, F22B 700
Patent
active
044534965
ABSTRACT:
A multitubular once-through boiler which exhibits an excellent heat transfer efficiency and requires a relatively smaller installation area. The multitubular once-through boiler comprises a combustion device, a ring-shaped upper header which functions as a vapor chamber, a ring-shaped lower header which functions as a water chamber, a plurality of vertical water-tubes connecting the upper and lower headers to form a single-row ring-shaped water-tube wall, a combustion chamber which is a cylindrical inner space surrounded by the water-tube wall, and a ring-shaped combustion gas passage formed between the water tube wall and an outer wall of the boiler. The water-tubes each has a spiral channel grooved on the surface thereof and is in contact with adjacent water-tubes. The area next to each two adjacent water-tubes, on the side of the tubes facing the outer wall of the boiler, has a barrier plate disposed in contact with the water tubes. The barrier plate has an approximately V-shaped cross-section corresponding to the configuration of said area.
The multitubular once-through boiler may further comprises a partition wall for dividing the cylindrical inner space of the water-tube wall into the combustion chamber and a flue.
REFERENCES:
patent: 1944817 (1934-01-01), Thomas
patent: 3170512 (1965-02-01), Smith
patent: 3311091 (1967-03-01), Kollerup
patent: 3566615 (1971-03-01), Roeder, Jr.
patent: 3838665 (1974-10-01), Astrom
patent: 4168743 (1979-09-01), Arai et al.
patent: 4344388 (1982-08-01), Stevens
patent: 4356794 (1982-11-01), Bowman et al.
patent: 4387669 (1983-06-01), Brown
Miura Co., Ltd.
Yuen Henry C.
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