Coal-burning boiler's ignition burner

Details Coal-burning boiler's ignition burner Coal-burning boiler's ignition burner

2006-04-04

2006-04-04

Rinehart, Kenneth (Department: 3749)

Furnaces

Utilizing powdered fuel

Having secondary air mixing means

Reexamination Certificate

active

07021222

ABSTRACT:
The present application disclosed an ignition and burning apparatus used in a coal boiler, comprising a pulverized coal burner and one or more combustion-enhancing miniature oil guns inserted in the pulverized coal burner, wherein the miniature oil gun comprises a first air supplying cylinder, an atomizing nozzle positioned in the first air supplying cylinder, an oil burner at a lower end of the atomizing nozzle, an ignition device adjacent to the oil burner and an air intake communicating with the first air supplying cylinder, wherein the pulverized coal burner comprises a cooling air cylinder, an air intake communicating with the cooling air cylinder, an expansion channel supported in the cooling air cylinder by a support, cooling structures surrounding the expansion channel, an external nozzle at one end of the expansion channel and a second air supplying cylinder adjacent to the miniature oil gun and communicating with the expansion channel. During the combustion of the pulverized coal, a certain amount of dry steam may be added for generating carbon monoxide and hydrogen for further enhancing the combustion of the pulverized coal. The ignition and burning apparatus used in coal boiler according to the present invention may save more than 90% of oil and demonstrates excellent economic performance.

REFERENCES:
patent: 4054028 (1977-10-01), Kawaguchi
patent: 4951581 (1990-08-01), Wiest
patent: 5647739 (1997-07-01), McDonald
patent: 6116171 (2000-09-01), Oota et al.
patent: 1201878 (1998-12-01), None
patent: 2325646 (1999-06-01), None
patent: 2337408 (1999-09-01), None
patent: 2371445 (2000-03-01), None
patent: 8-226615 (1996-09-01), None

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