Boiler with increased flame temperature and output

Details Boiler with increased flame temperature and output Boiler with increased flame temperature and output

1995-10-18

1997-05-06

Bennett, Henry A.

Liquid heaters and vaporizers

Heat transmitter

126 91A, 432181, F22B 2306

Patent

active

056261047

ABSTRACT:
A boiler is provided with a radiation heat transfer section in its combustion chamber, which has therein, at least one regenerative-heating burner system including a pair of burners each with a regenerative bed. The burners receive combustion air and exhaust combustion gas which passes through the regenerative beds. Combustion is alternately effected in one of the burners and combustion gas is passed into the other burner, and exhausted through the corresponding regenerative bed of this other burner. Surplus thermal energy which is not completely consumed in the radiation heat transfer section is recovered in the regenerative bed. Combustion air then passes through the heated regenerative bed to heat the air. The boiler temperature is kept flat across the boiler. That is, the temperature is kept almost constant across the combustion chamber. This is done by maintaining a high rate of forced supply of more than 60 m/s for the combustion air. Also, the combustion air is heated to above the ignition point of the fuel, that is, about 800.degree. C. These two factors increases thermal efficiency while reducing NO.sub.x emissions.

REFERENCES:
patent: 4522588 (1985-06-01), Todd et al.
patent: 4856492 (1989-08-01), Kawamoto
patent: 5057010 (1991-10-01), Tsai
patent: 5161968 (1992-11-01), Nutcher et al.
patent: 5304059 (1994-04-01), Tanaka et al.

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