基于Aspen Plus的Shell气流床工业气化炉模拟  

Simulation of industrial Shell entrained flow bed by Aspen Plus

作　　者：郑志行 李谦 张家元[1] 周浩宇[2] ZHENG Zhihang;LI Qian;ZHANG Jiayuan;ZHOU Haoyu(College of Energy Science and Engineering,Central South University,Changsha 410083,Hunan,China;National Engineering Research Center of Sintering and Pelletizing Equipment System,Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China)

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]中冶长天国际工程有限责任公司国家烧结球团装备系统工程技术研究中心,湖南长沙410205

出　　处：《化工进展》2021年第4期2152-2160,共9页Chemical Industry and Engineering Progress

基　　金：湖南省自然科学基金(2020JJ5994)。

摘　　要：基于Aspen Plus软件的Gibbs自由能最小化法,本文建立了煤粉在Shell气流床中的气化模型。该模型预测气化温度和煤气组成,与文献试验结果吻合良好。利用Aspen Plus的灵敏度分析模块研究了氧煤比、氧气体积分数和氧气预热温度对气化结果的影响,并进行了正交模拟计算,研究了以上3种因素共同作用的结果。结果表明:氧煤比增加使碳转化率升高,冷煤气效率先升高后降低,并在氧煤比为0.9kg/kg时取得最大值77.72%;氧气体积分数增加使煤气热值、碳转化率和冷煤气效率升高,氧煤比为0.8kg/kg且氧气体积分数为50%时,冷煤气效率可达82.6%;氧气预热温度增加使碳转化率、冷煤气效率升高,氧煤比为0.8kg/kg且氧气预热温度为600℃时,冷煤气效率可达82%。通过正交模拟计算综合分析,氧煤比对冷煤气效率和碳转化率的影响作用占首位,氧气体积分数对煤气热值、有效气体积分数、煤气产率的影响作用占首位,氧气预热温度对煤气化指标影响较小。在实验范围内,当氧煤比0.8kg/kg、氧气体积分数100%、氧气预热温度300℃时的煤气热值达到最大值3011kcal/m^(3);当氧煤比为0.8kg/kg、氧气体积分数60%~100%、氧气预热温度300~500℃时的冷煤气效率达到最大值83.46%。Based on the Gibbs free energy minimization method of Aspen Plus software,the coal gasification model in the Shell entrained flow bed was established.The model predicted the gasification temperature and gas composition,which was in good agreement with experimental results.The sensitivity analysis module of Aspen Plus was used to research the effects of oxygen-to-coal ratio,oxygen concentration and oxygen preheating temperature on the gasification results,and an orthogonal simulation calculation was designed to research the results of the above three factors.The results show that with the increase in the oxygen-to-coal ratio,the carbon conversion rate increases,and the cold gas efficiency increases initially and then decreases,and reaches a maximum value of 77.72% when the oxygen-to-coal ratio is 0.9kg/kg;the increase in oxygen concentration makes the gas calorific value,carbon conversion rate,and cold gas efficiency increase,and when the oxygen-to-coal ratio is 0.8kg/kg and the oxygen volume fraction is 50%,the cold gas efficiency can reach 82.6%;the increase in oxygen preheating temperature increases the carbon conversion rate and the cold gas efficiency,and when the oxygen-tocoal ratio is 0.8kg/kg and the oxygen preheating temperature is 600℃,the cold gas efficiency can reach 82%.The comprehensive analysis of orthogonal simulation calculation shows that the effect of oxygen-tocoal ratio on the efficiency of cold gas and carbon conversion rate takes the first place;the effect of oxygen volume fraction on the gas calorific value,effective gas volume fraction,and gas yield takes the first place;and the oxygen preheat temperature has little effect on coal gasification index.Within the experimental range,when the oxygen-to-coal ratio is 0.8kg/kg,the oxygen volume fraction is 100%,and the oxygen preheating temperature is 300℃,the gas calorific value reaches the maximum value of 3011kcal/m^(3);when the oxygen-to-coal ratio is 0.8kg/kg,the oxygen volume fraction is 60%—100%,and the oxygen preheating temperature i

关 键 词：Aspen Plus 气流床 灵敏度分析 氧气体积分数 正交模拟计算 

分 类 号：TQ545[化学工程—煤化学工程]