Liquid heaters and vaporizers – Feeders – Automatic
Patent
1984-09-28
1986-06-10
Makay, Albert J.
Liquid heaters and vaporizers
Feeders
Automatic
122446, 122448R, 236 245, 236 25R, F22D 526
Patent
active
045936544
ABSTRACT:
A feedwater controller for a flash type water tube boiler wherein feedwater flow through steam generating coils heated by combustion gases is compensated and adjusted, in order to provide proper combustion heat input over a broad range of boiler operating pressures and feedwater temperatures. Flowing feedwater affects combustion heat input through predetermined variations in fuel and air input to the boiler's burner. As disclosed, the first embodiment utilizes temperature and pressure compensating gates in a cylindrical orifice containing a spherical flow control member. Fuel/air control of the generator is provided through movement of the flow control member due to the forces induced by flowing feedwater. In an alternate embodiment, utilizes a piston in the feedwater flow path having a slotted cylindrical metering orifice attached thereto. Internal of the cylindrical orifice is a cooperating temperature compensated helical flow control member. Feedwater flow adjustments over a wide range of feedwater temperature is provided.
REFERENCES:
patent: 4346835 (1982-08-01), Trotter et al.
patent: 4429682 (1984-02-01), Huang
patent: 4431132 (1984-02-01), Edmundson et al.
patent: 4505253 (1985-03-01), Mizuno et al.
Lidd Francis J.
Makay Albert J.
Vapor Corporation
Warner Steven E.
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