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内循环厌氧反应器Fluent数值模拟与优化

蔡会勇,刘永红,李婷,于兴峰   

  1. 西安工程大学环境与化学工程学院,陕西 西安 710048
  • 出版日期:2014-12-05 发布日期:2014-12-05

Numerical simulation and optimization of internal circulation anaerobic reactor by Fluent software

CAI Huiyong,LIU Yonghong,LI Ting,YU Xingfeng   

  1. School of Environmental & Chemical Engineering,Xi’an Polytechnic University,Xi’an 710048,Shaanxi,China
  • Online:2014-12-05 Published:2014-12-05

摘要: 采用Fluent技术对25L内循环(IC)厌氧反应器内气液两相的流动过程进行了数值模拟,考察了提升管直径(0.006m、0.009m、0.012m、0.015m、0.018m、0.021m)和反应器容积负荷[8.64kgCOD/(m3?d)、10.08kgCOD/(m3?d)、11.52kgCOD/(m3?d)、12.96kgCOD/(m3?d)、14.40kgCOD/(m3?d)、15.84kgCOD/(m3?d)]变化对其内循环量的影响。研究结果表明:①当反应器容积负荷为11.52kgCOD/(m3?d)、提升管直径为0.015m时,该反应器内循环量达到最大值0.0079m3/h;②当提升管直径为0.015m、容积负荷为12.96kgCOD/(m3?d)时,该反应器内循环量增幅达到最大值9.28%,通过拟合获得了内循环量Y与产气量X间的经验关联式为Y=1.0514X+0.004。

关键词: 内循环厌氧反应器, Fluent模拟, 内循环量, 提升管直径, 容积负荷, 内循环厌氧反应器, 数值模拟, 内循环量, 气液两相流, 优化设计

Abstract: The process of gas-liquid two-phase flow of internal circulation anaerobic (IC) reactor (25L) was simulated by Fluent software. The influence of internal circulation flow rate with different riser pipe diameters (0.006m,0.009m,0.012m,0.015m,0.018m,0.021m)and volume loading rates [8.64kgCOD/(m3?d),10.08kgCOD/(m3?d),11.52kgCOD/(m3?d),12.96kgCOD/(m3?d),14.40 kgCOD/(m3?d),15.84kgCOD/(m3?d)] were investigated. When volume loading rate was 11.52kgCOD/(m3?d),and riser diameter was 0.015m,a maximum internal circulation flow rate of 0.0079m3/h was observed. When riser diameter was 0.015m,and volume loading rate was 12.96 kgCOD/(m3?d),a maximum increase amplitude of 9.28% was observed. The correlation of Y=1.0514X+0.004 between internal circulation flow rate(Y) and biogas production(X) was obtained by fitting.

Key words: internal circulation anaerobic reactor, fluent simulation, internal circulation flow rate, riser pipe diameter, volume loading rate, internal circulation anaerobic reactor, numerical simulation, internal circulation flow rate, gas-liquid flow, optimal design

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