Numerical Modeling of Gas-solid Flow and Heat Transfer in Blowpipe of BF Oxy-coal Injection
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摘要: 以氣一固兩相的動量、熱量、物質守衡為基礎,用多流體模型描述氣體和顆粒兩相的運動,用氣相湍流模型和顆粒湍流代數模型分別描述氣相和顆粒相的湍流特性,建立了高爐局部富氧噴煤直吹管內氣-固兩相流動及傳熱的數學模型.數值模擬了9種工況下的氣相流場、溫度場以及煤粉顆粒相的速度場、濃度場和溫度場,并研究了富氧率、風溫、固氣比、插槍角度等噴吹參數對各種場量的影響.數值模擬結果與實測值符合良好.Abstract: A mathematical model of the gas-solid flow and heat transfer in blowpipe of BF oxy-coal injection has been developed by the multi-flow model and turbulence model. Then the velocity and temperature of both gas and pulverized coal as well as its concentration have been calculated in industrial scale blowpipe under different injection conditions. The theoretical predictions are in qualitative agreement with experiments.
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Key words:
- blast furnace /
- coal injectoin /
- oxygen enrichment /
- mathematical model /
- numerical modeling
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