Liquid heaters and vaporizers – Feeders – Automatic
Patent
1991-01-31
1991-10-15
Favors, Edward G.
Liquid heaters and vaporizers
Feeders
Automatic
1224064, 1224065, F22D 526
Patent
active
050564684
ABSTRACT:
A steam generator includes a gas flue having burners for fossil fuel, a gas-tight tube wall with tubes, inlet and outlet headers connected to the tubes, the outlet header being at a higher level than the inlet header, and a down pipe outside the tube wall connecting the outlet to the inlet header. A steam line is connected to the outlet header and at least one heating surface is connected downstream of the outlet header in the steam line. A feedwater line is connected to the gas flue and an economizer is connected upstream of the gas flue in the feedwater line. A regulating device for influencing feedwater flow in the feedwater line detects at least one of: the steam enthalpy in the heating surface or the steam line downstream of the heating surface, the steam temperature in the heating surface or the steam line downstream of the heating surface, the thermal output transfer to the tubes, a ratio of feedwater flow in the feedwater line to steam flow in the steam line, a ratio of injection water flow into an injection cooler connected in the steam line to feedwater flow in the feedwater line, and residual moisture of steam in the steam line.
REFERENCES:
patent: 3213835 (1965-10-01), Egglestone
patent: 3297004 (1967-01-01), Midtlyng
patent: 4290389 (1981-09-01), Palchik
patent: 4294200 (1981-10-01), Gorzegno
patent: 4457266 (1984-07-01), Laspisa
patent: 4829831 (1989-05-01), Kefer et al.
patent: 4841918 (1989-06-01), Fukayama et al.
patent: 4869210 (1989-09-01), Wittchow
G. Klefenz: "Die Regelung von Dampfkraftwerken", 1985, Bibliografisches Institut, Mannheim: p. 109, line 1-p. 129, line 8, Figs. 73 and 83.1.
R. Dolezal: "Dampferzeugung", 2/1985, pp. 7, 8 and 262.
Franke Joachim
Vollmer Wolfgang
Wittchow Eberhard
Favors Edward G.
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
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