Furnaces – Process
Patent
1990-02-26
1991-04-02
Yuen, Henry C.
Furnaces
Process
110347, 110264, 122 4D, F23B 700, F23D 102
Patent
active
050038915
ABSTRACT:
The known pulverized coal combustion method including the steps of separating pulverized coal mixture gas ejected from a vertical type coal grinder into thick mixture gas and thin mixture gas by a distributor, and injecting these thick and thin mixture gases, respectively, through separate burner injecting ports into a common furnace to make them burn, is improved so as to reduce both an unburnt content in the ash and a nitrogen oxide concentration in exhaust gas while maintaining an excellent ignition characteristic. The improvements reside in that an air-to-fuel ratio of the thick mixture gas is regulated to within the range of 1-2, while an air-to-fuel ratio of the thin mixture gas is regulated to within the range of 3-6, and the range of a degree of pulverization of the pulverized coal is regulated to 100 mesh residue 1.5% or less. The degree of pulverization of the pulverized coal fed to the distributor is regulated either by adjusting the rotational speed of a rotary type classifier in the grinder or by adjusting the angles formed between classifying vanes, rotating about the axis of the rotary type classifier, and the direction of rotation.
REFERENCES:
patent: 4501204 (1985-02-01), McCantney et al.
patent: 4672900 (1987-06-01), Santalla et al.
patent: 4773339 (1988-09-01), Garcia-Mallol
Kaneko Shozo
Kinoshita Masaaki
Mitsubishi Jukogyo Kabushiki Kaisha
Yuen Henry C.
LandOfFree
Pulverized coal combustion method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pulverized coal combustion method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulverized coal combustion method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-321037