气泡修正多尺度曳力模型的鼓泡流化床生物质气化分析

doi:10.16085/j.issn.1000-6613.2017.04.010

化工进展 ›› 2017, Vol. 36 ›› Issue (04): 1224-1230.DOI: 10.16085/j.issn.1000-6613.2017.04.010

气泡修正多尺度曳力模型的鼓泡流化床生物质气化分析

陈巨辉^1,2, 殷维杰¹, 王帅³, 于广滨¹, 胡汀², 林枫²

1 哈尔滨理工大学机械学院, 黑龙江哈尔滨 150080;
2 哈尔滨第703研究所燃气轮机室, 黑龙江哈尔滨 150036;
3 哈尔滨工业大学能源科学与工程学院, 黑龙江哈尔滨 150001

收稿日期:2016-09-29 修回日期:2016-11-21 出版日期:2017-04-05 发布日期:2017-04-05
通讯作者: 陈巨辉
作者简介:陈巨辉(1982-),女,博士,副教授,研究方向为气固两相流、流化床洁净燃烧技术。E-mail:chenjuhui@hit.edu.cn。
基金资助:
国家自然科学基金（51406045）；中国博士后自然科学基金（2016M590122）及哈尔滨理工大学青年拔尖创新人才培养计划（201504）项目。

Analysis of biomass gasification in bubbling fluidized bed with a revised bubble-based energy minimization multiscale drag model

CHEN Juhui^1,2, YIN Weijie¹, WANG Shuai³, YU Guangbin¹, HU Ting², LIN Feng²

1 School of Mechanical Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China;
2 No. 703 Research Institute of China Shipbuilding Industry Corporation, Harbin 150001, Heilongjiang, China;
3 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Received:2016-09-29 Revised:2016-11-21 Online:2017-04-05 Published:2017-04-05

摘要/Abstract

摘要： 以双流体模型为框架，气泡修正多尺度曳力模型描述介观尺度作用影响，结合化学反应动力学方法建立生物质气化模型，模拟了鼓泡流化床内生物质气化过程。采用气泡修正多尺度曳力模型考虑了介观尺度影响，使气固异相反应增强，模拟结果更接近实验值。模拟结果给出了颗粒浓度、速度矢量瞬时分布、气体组分摩尔分数瞬时分布及碳和灰分的质量分数瞬时分布特性。分析了氧当量比对鼓泡流化床生物质气化过程的影响。总体上，气体产量随着氧当量比的增加而减小。经分析得出，H₂和CH₄的产量与氧当量比有着较高的相关性，拟合优度都在0.99以上；对于CO和CO₂，则用三次多项式拟合时能有较好拟合优度。并且，CO随着氧当量比的增加先下降较快，然后平缓，最后再次较快下降。而CO₂的下降趋势则与CO正好相反，先平缓，后下降快，最后再次平缓。

关键词: 气泡修正多尺度曳力模型, 双流体模型, 氧当量比, 生物质气化, 鼓泡流化床

Abstract: Based on the framework of two-fluid model,a revised bubble-based energy minimization multiscale(EMMS) drag model was proposed. Incorporating chemical kinetics method,the biomass gasification model was presented for simulating the biomass gasification process in the bubbling fluidized. The simulations with Bubble-based EMMS drag model that accounted for the effect of bubble in mesoscale which enhances the heterogeneous reaction between gas phase and solid phase were in good agreement with the experimental data. The simulation results provided the distributions of particles concentration,velocity vector,molar fractions of gas phase,and mass fractions of carbon and ash. The effect of equivalence ratio on biomass gasification process in the bubbling fluidized bed was analyzed. In general,the gas products tend to decrease with the increase of equivalence ration. Analysis found that the production of H₂ and CH₄ has strong correlation with the equivalence ratio with goodness of fit(adj. R²) above 0.99. As for CO and CO₂,their correlations with the equivalence ratio can be better predicted by cubic polynomials. And,CO first decreases significantly as equivalence ratio increases,then becomes flat and finally decreases afterwards. CO₂,however,follows the opposite trend.

Key words: revised bubble-based EMMS drag model, two-fluid model, equivalence ratio, biomass gasification, bubbling fluidized bed

中图分类号:

O359

陈巨辉, 殷维杰, 王帅, 于广滨, 胡汀, 林枫. 气泡修正多尺度曳力模型的鼓泡流化床生物质气化分析[J]. 化工进展, 2017, 36(04): 1224-1230.

CHEN Juhui, YIN Weijie, WANG Shuai, YU Guangbin, HU Ting, LIN Feng. Analysis of biomass gasification in bubbling fluidized bed with a revised bubble-based energy minimization multiscale drag model[J]. Chemical Industry and Engineering Progress, 2017, 36(04): 1224-1230.

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气泡修正多尺度曳力模型的鼓泡流化床生物质气化分析

Analysis of biomass gasification in bubbling fluidized bed with a revised bubble-based energy minimization multiscale drag model

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