| 工业裂解炉数学模拟的加速算法 |
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| 引用本文： | 徐强,陈丙珍,何小荣.工业裂解炉数学模拟的加速算法[J].清华大学学报(自然科学版),2002,42(10):1300-1303. |
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| 作者姓名： | 徐强 陈丙珍 何小荣 |
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| 作者单位： | 清华大学,化学工程系,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目 ( 2 9910 76 186 3) |
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| 摘 要： | 乙烯裂解炉裂解过程模拟是一个复杂的迭代试算过程 ,现有模拟方法计算时间冗长 ,难以用于在线优化。为此提出的加速算法把裂解过程中的能量平衡关系式作适当简化 ,把反应管管壁温度的求解转换为解一元四次方程的根 ,从而直接得到温度沿管长的微分方程式 ,再结合反应物料和压力沿管长的微分方程式 ,使得裂解过程由一套新的、完整的微分方程组来描述 ,并在模拟过程中对能量关系式的简化作了逐步改进的处理。工业实例表明该算法避免了复杂的迭代计算 ,模拟计算的速度比以前的算法提高约 1/18,同时模拟准确度也有相当的保证
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| 关 键 词： | 裂解炉 乙烯 模拟 |
| 文章编号： | 1000-0054(2002)10-1300-04 |
| 修稿时间： | 2001年6月25日 |
An improved method of simulation of ethylene cracking furnaces |
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| XU Qiang,CHEN Bingzhen,HE Xiaorong.An improved method of simulation of ethylene cracking furnaces[J].Journal of Tsinghua University(Science and Technology),2002,42(10):1300-1303. |
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| Authors: | XU Qiang CHEN Bingzhen HE Xiaorong |
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| Abstract: | To accelerate the calculation speed for simulating ethylene cracking furnace, an improved simulation method was proposed. The tube wall temperature of cracking furnaces was described using a quartic equation, which made the energy equations changed to the oil gas temperature differential equation along tube length. One set of new continuity equations for various species, temperature and pressure was implemented to describe the whole pyrolysis process. The rough effects from the simplified assumptions were also compensated through successive approximation with reusing the intermediate results during the simulating process. Industrial examples showed that the method reduced a great deal of complex iterations and the calculating time shrank to about 1/18 compared with previous methods. The improved method significantly accelerates the simulation speed with enough accuracy. |
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| Keywords: | cracking furnace ethylene simulation |
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