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Erschienen in:
2022 | OriginalPaper | Buchkapitel
26. Numerical Simulation on Pulverized Coal Combustion Chamber with Air Cooling
verfasst von : Yongying Wang, Naiji Wang, Shi Yang
Erschienen in: Clean Coal and Sustainable Energy
Verlag: Springer Singapore
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Abstract
To investigate the relationship between the temperature distribution in the air-cooled combustor, flame shape and gas distribution ratio, 3D modeling of 14 MW air-cooled combustor and its corresponding furnace was constructed and a series of numerical simulation cases were conducted in this article. The results show that: At the constant excess air ratio, the average temperature in the combustion chamber and the wall temperature both decrease with the increase of internal secondary air ratio. When the internal secondary air ratio is in the range of 0.3–0.4, the wall temperature is relatively high. The highest wall temperature is 930 K, which appears when the internal secondary air ratio is 0.4. When the internal/external secondary air ratio is 0.5/0.5, the flame fullness is at the highest value, which is an appropriate operating condition.