Liquid heaters and vaporizers – Plants – Feed water heaters
Patent
1998-03-02
2000-01-04
Leung, Philip H.
Liquid heaters and vaporizers
Plants
Feed water heaters
431 62, 110173B, F22B 3300
Patent
active
060098406
ABSTRACT:
When a boiler plant (100), which is equipped with an air plenum (104), is in operation, during the startup phase the admission pressure in this air plenum (104) is lowered in terms of time and amount via a blowoff device (106) with respect to combustion air (7) and startup air (105) made available from this air plenum (104). The air coefficient to the burner is consequently reduced. This ensures that, by means of such a near-stoichiometric fuel/air mixture, favorable ignition conditions are provided in the burner and the pollutant emissions during the startup phase are greatly reduced.
REFERENCES:
patent: 2623482 (1952-12-01), Ayers
patent: 2835230 (1958-05-01), Cleaver et al.
patent: 4940042 (1990-07-01), Moore, Jr. et al.
patent: 5029533 (1991-07-01), Hengelmolen
patent: 5636619 (1997-06-01), Poola et al.
Haumann Jurgen
Knopfel Hans Peter
Sattlemayer Thomas
ABB Research Ltd.
Leung Philip H.
Lu Jiping
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