Liquid heaters and vaporizers – Heat transmitter
Patent
1996-01-16
1999-04-06
Parshall, Mark H.
Liquid heaters and vaporizers
Heat transmitter
432181, F22B 2306
Patent
active
058904573
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 than 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: 4829703 (1989-05-01), Watson et al.
patent: 4838782 (1989-06-01), Wills
patent: 4870947 (1989-10-01), Kawamoto
patent: 4923391 (1990-05-01), Gitman
patent: 4948365 (1990-08-01), Yuen
patent: 5049064 (1991-09-01), Wills
patent: 5057010 (1991-10-01), Tsai
patent: 5304059 (1994-04-01), Tanaka et al.
Kataoka Yosuke
Matsuo Mamoru
Tanaka Ryoichi
Yahara Hitoshi
Lu Jiping
Nippon Furnace Kogyo Kabushiki Kaisha
Parshall Mark H.
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