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基于煤氣化學能最大化利用的上部吹氧豎爐靜態模型

Static model of shaft furnaces with oxygen injection based on chemical energy maximized utilization

  • 摘要: 針對豎爐生產中存在的煤氣還原勢未能充分利用、煤氣消耗量高以及二氧化碳排放高等問題,設計出一種上部增設吹氧裝置的豎爐.基于物料平衡和熱平衡建立了上部吹氧豎爐的靜態模型,并對其進行了數值求解模擬和分析.模擬結果表明,在典型條件下,上部吹氧豎爐每噸直接還原鐵的還原煤氣量為1404.67m3,吹氧量為20.32m3,煤氣出口還原勢降至0.56,排碳量減少26.25%,能耗減少19.56%.

     

    Abstract: In consideration of such problems as low gas utilization ratio, large gas consumption and high carbon dioxide emissions, a method was proposed by designing a new shaft furnace with oxygen injection into the upper zone. Based on the mass and energy balances of gas and solid phases, a static model of the shaft furnace was developed to simulate the iron-making process in the shaft furnace. Calculating results show that under the typical operation conditions, the gas volume of the shaft furnace with oxygen injection is 1 404. 67 m3, and the oxygen volume is 20. 32 m3 for per ton of direct reduction iron. In comparison with a traditional shaft furnace, the reduction potential of top gas decreases to 0. 56, the carbon emission decreases by 26. 25%, and the energy consumption decreases by 19. 56%.

     

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