基于Aspen Plus的循环流化床工业气化炉模拟

doi:10.16085/j.issn.1000-6613.2017-1493

化工进展 ›› 2018, Vol. 37 ›› Issue (05): 1709-1717.DOI: 10.16085/j.issn.1000-6613.2017-1493

基于Aspen Plus的循环流化床工业气化炉模拟

刘忠慧^1,2, 于旷世¹, 张海霞¹, 朱治平^1,2

1 中国科学院工程热物理研究所, 北京 100190;
2 中国科学院大学, 北京 100049

收稿日期:2017-07-19 修回日期:2017-11-07 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 于旷世,高级工程师,研究生导师。
作者简介:刘忠慧(1992-),女,硕士研究生,研究方向为煤化工工艺模拟与优化。E-mail:liuzhonghui_92@163.com。
基金资助:
国家重点研发计划项目（2017YFB0602302）。

Simulation of industrial circulating fluidized bed gasifier by Aspen Plus

LIU Zhonghui^1,2, YU Kuangshi¹, ZHANG Haixia¹, ZHU Zhiping^1,2

1 Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2017-07-19 Revised:2017-11-07 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 循环流化床煤气化炉在工业应用过程中，由于试验煤种及操作条件的多样性，通过试验法优化操作过程所需周期较长、成本较大。因此以大量工程数据为边界条件，基于Gibbs自由能最小化原理，利用Aspen Plus对气化过程进行模拟，通过灵敏度分析，研究了单因素氧煤比、蒸汽煤比、气化压力、空气/蒸汽预热温度变化对气化指标的影响；并运用正交实验，研究了以上4种因素共同作用的结果。研究结果表明：氧煤比增加使有效气（CO+H₂）含量、冷煤气效率先增加再减小，并在0.45～0.50kg/kg时取得最大值；蒸汽煤比增加使煤气热值和气化温度减小，对有效气含量基本没有影响；气化压力增加使煤气热值和气化温度增加；空气/蒸汽预热温度增加使气化温度、有效气含量、冷煤气效率增加，煤气热值减小。通过正交实验综合分析，氧煤比和空气/蒸汽预热温度对气化指标的影响较为显著，两者对气化指标的影响趋势基本一致；蒸汽煤比主要影响煤气热值，而气化压力主要影响比氧耗，对其他指标影响较小。

关键词: 循环流化床, 优化, Aspen Plus, 灵敏度分析, 正交实验

Abstract: In the process of industrial circulating fluidized bed gasification,experimental research is time-consuming and cost-consuming due to the diversity of coal types and operating conditions. A circulating fluidized bed gasifier model was developed by Aspen Plus based on Gibbs free energy minimization. The boundary conditions of the simulation were set in terms of existing industry data. Different factors in gasification process were investigated,including oxygen-coal ratio,stream-coal ratio,gasification pressure and air/stream preheating temperature. The orthogonal experiments were used to study the interactive effect of the four factors. The results showed that the gasification product (CO+H₂) content and cold gas efficiency increase first and then decrease with oxygen-coal ratio increasing. The optimal range of oxygen-coal ratio is 0.45-0.50kg/kg. The gas heating value and gasification temperature decrease with the increase of stream-coal ratio. However,the gasification product content is hardly affected by stream-coal ratio. The gas heating value and gasification temperature increase with gasification pressure increasing. The gasification temperature,gasification product content and cold gas efficiency increase with air/stream preheating temperature increasing,while gas heating value decreases with air/stream preheating temperature increasing. The oxygen-coal ratio and air/stream preheating temperature have significant influence on gasification index,and they also have the same impact on gasification index through orthogonal experiment. The stream-coal ratio mainly affects gas heating value,while gasification pressure has significant influence on oxygen consumption rate.

Key words: circulating fluidized bed, optimization, Aspen Plus, sensitivity analysis, orthogonal experiment

中图分类号:

TQ546

刘忠慧, 于旷世, 张海霞, 朱治平. 基于Aspen Plus的循环流化床工业气化炉模拟[J]. 化工进展, 2018, 37(05): 1709-1717.

LIU Zhonghui, YU Kuangshi, ZHANG Haixia, ZHU Zhiping. Simulation of industrial circulating fluidized bed gasifier by Aspen Plus[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1709-1717.

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基于Aspen Plus的循环流化床工业气化炉模拟

Simulation of industrial circulating fluidized bed gasifier by Aspen Plus

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