Combustion – Flame holder having protective flame enclosing or flame... – Including means feeding air axially spaced points of the flame
Patent
1988-03-03
1989-09-19
Kamen, Noah P.
Combustion
Flame holder having protective flame enclosing or flame...
Including means feeding air axially spaced points of the flame
431 10, 122 44R, F23D 1500
Patent
active
048676748
ABSTRACT:
In the method, a process medium (14) is heated in two stages, in which fuel oil and gas premixed with air in a burner device (1) are partially burnt in a preliminary combustion chamber (12) substoichiometrically with an air coefficient (.lambda.) of approximately 0.7. The partially burnt mixture, which is low in nitrogen oxides, reaches a temperature of 1800.degree.-1900.degree. C., heats the process medium (14), which is already preheated to an intermediate temperature, to its final temperature in a heat exchanger (13) with counter-current flow and is cooled to 700.degree.-900.degree. C. In an air injection region (15) of the process heat generator the partially burnt mixture is mixed with quenching air in a stoichiometric ratio with respect to the unburnt fractions and is thereby completely burnt in a secondary combustion chamber (18) during which practically no nitrogen oxides (NO.sub.x) are produced. It reaches a temperature of 900.degree.-1300.degree. C. and then heats the process medium (14) from its initial temperature to the aforesaid intermediate temperature in a second heat exchanger (19 ). The process medium flows between the two heat exchangers (13, 19) and the process medium discharge line (25) in an annular duct (22) which essentially forms the outer boundary of the process heat generator.
REFERENCES:
patent: 3955909 (1976-05-01), Craig et al.
patent: 4343606 (1982-08-01), Blair et al.
patent: 4388062 (1983-06-01), Bartok et al.
Keller Jakob
Sattelmayer Thomas
BBC Brown Boveri AG
Kamen Noah P.
LandOfFree
Method and device for process heat generation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for process heat generation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for process heat generation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-365586