| 水激冷对粉煤气化过程气体组成的影响 |
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| 引用本文： | 张强,代正华,黄波,王亦飞,刘海峰,龚欣.水激冷对粉煤气化过程气体组成的影响[J].医学教育探索,2018,44(5):625-630. |
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| 作者姓名： | 张强 代正华 黄波 王亦飞 刘海峰 龚欣 |
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| 作者单位： | 华东理工大学煤气化及能源化工教育部重点实验室, 上海市煤气化工程研究中心, 上海 200237,华东理工大学煤气化及能源化工教育部重点实验室, 上海市煤气化工程研究中心, 上海 200237,华东理工大学煤气化及能源化工教育部重点实验室, 上海市煤气化工程研究中心, 上海 200237,华东理工大学煤气化及能源化工教育部重点实验室, 上海市煤气化工程研究中心, 上海 200237,华东理工大学煤气化及能源化工教育部重点实验室, 上海市煤气化工程研究中心, 上海 200237,华东理工大学煤气化及能源化工教育部重点实验室, 上海市煤气化工程研究中心, 上海 200237 |
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| 基金项目： | 国家自然科学基金（21776087）；国家重点研发计划课题（2017YFB0602604）；山西省煤基重点科技攻关项目（MH2014-01）；中央高校基本科研业务费专项资金（222201717004） |
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| 摘 要： | 激冷室下降管内热质传递过程强烈，水蒸气含量较高，下降管内变换反应对激冷室出口合成气组成有一定的影响。基于激冷室的数值模拟研究，建立了涉及气化室、激冷室的粉煤气化炉数学模型，利用所建气化模型研究了激冷水流量及温度对激冷室出口合成气组成的影响。结果表明，下降管内蒸发的激冷水质量占入口激冷水总质量的4.4%；气化室出口合成气经激冷室后CO体积分数降低12.5%、H2体积分数增加5.8%，有效气体积分数降低6.7%，激冷室出口合成气组成计算结果与工业数据吻合较好；激冷水流量与温度对激冷室出口合成气组成影响差别较小。
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| 关 键 词： | 粉煤气化炉 激冷室 下降管 变换反应 |
| 收稿时间： | 2017/9/12 0:00:00 |
Influence of Water Quench on Syngas Composition of Entrained Flow Pulverized Coal Gasification Process |
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| ZHANG Qiang,DAI Zheng-hu,HUANG Bo,WANG Yi-fei,LIU Hai-feng and GONG Xin.Influence of Water Quench on Syngas Composition of Entrained Flow Pulverized Coal Gasification Process[J].Researches in Medical Education,2018,44(5):625-630. |
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| Authors: | ZHANG Qiang DAI Zheng-hu HUANG Bo WANG Yi-fei LIU Hai-feng and GONG Xin |
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| Institution: | Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China,Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China,Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China,Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China,Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China and Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | Strong heat and mass transfer processes exist in the vertical pipe of quench chamber. The content of water vapor in the gas phase resulted from the high temperature of the gas phase is so high that the water gas shift reaction will have an effect on the composition of raw syngas. Firstly, based on the flow field and partitions of the pulverized coal gasifier, a reactor network model of gasification chamber is built to obtain the results of the gasifier outlet gas, such as temperature and composition of the gasifier outlet gas. The coal pyrolysis process, homogeneous and heterogeneous reactions are all included in the model. The ratio of evaporated water to the inlet cooling water is obtained through the numerical simulation of the heat and mass transfer process in the vertical pipe. Then, a quench chamber model is built in which the vertical pipe and the liquid pool are simulated by a plug flow reactor and a separator respectively. A mathematical model involving the gasification chamber and quench chamber of an entrained flow pulverized coal gasifier is developed. The effects of the feeding rate and temperature of cooling water on composition of raw syngas are investigated respectively by the mathematical model. The results show that the mass of evaporated cooling water accounts for 4.4% of the inlet cooling water in the vertical pipe. CO volume fraction of gasifier outlet gas decreased by 12.5%, H2 volume fraction increased by 5.8%, and the volume fraction of effective gas decreased by 6.7% during the quench process. The results of composition of raw syngas meet well with the industrial data. Feeding rate and temperature of cooling water have little influence on the composition of raw syngas. |
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| Keywords: | pulverized coal gasifier quench chamber vertical pipe shift reaction |
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