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Abstract

The burner device of the present invention for high-temperature combustion is equipped with: an insulating part (5), which is provided facing a furnace (1) and has a throat (6); a burner nozzle (9), which is provided at the center of the axis of this throat and which sprays a mixed flow of pulverized coal (38) into the furnace through the throat; a wind box (8) provided so as to house this burner nozzle; an air register (16), which is provided at the tip of the burner nozzle, and sprays low-temperature secondary air from the wind box toward the throat; a high-temperature air nozzle (23), one end of which opens into the furnace through the insulating part; and combustion air switching means (16, 24), which switch between spraying low-temperature secondary air toward the throat through the air register and spraying high-temperature secondary air into the furnace through the high-temperature air nozzle. During normal combustion, low-temperature secondary air is sprayed toward the throat through the air register and a mixed flow of pulverized coal is sprayed from the burner nozzle, by means of the combustion air switching means. During high-temperature air combustion, high-temperature secondary air is sprayed into the furnace through the high-temperature air nozzle and a mixed flow of pulverized coal is sprayed from the burner nozzle, by means of the combustion air switching means.

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First Claim

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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other