CFD FLOW FIELD SIMULATION ANALYSIS BASED ON RHEOLOGICAL CHARACTERISTICS OF ANAEROBIC FERMENTATION MIXED RAW MATERIALS

被引：0
|
作者：
Sun H. [1 ]
Chen G. [1 ]
Liu S. [2 ]
Wang C. [2 ]
Hou J. [1 ]
Wang Y. [1 ]
机构：
[1] College of Mechanical & Electrical Engineering, Hebei Agricultural University, Baoding
[2] Hebei Animal Husbandry Station, Shijiazhuang
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 08期
关键词：
anaerobic fermentation; biomass energy; CFD; mixed raw materials; numerical analysis; viscosity;
D O I：
10.19912/j.0254-0096.tynxb.2022-0594
中图分类号：
学科分类号：
摘要：
In order to determine the movement characteristic of raw materials in the anaerobic fermentation reactor under different agitators，the rheological properties of pure chicken manure and mixed raw materials of chicken manure and corn stover with ratio of 1：4 （weight basis）under different total solid content were measured. Based on the rheological properties of mixed raw materials，the numerical simulation of four kinds of agitators were analyzed by using CFD. The results show that mixed raw materials is non-Newtonian fluids which is similar to the chicken manure，and its rheological properties can be characterized by power law model. The viscosity of mixed materials decreases with the increasing of siring speed，while the consistency coefficient and rheological index of mixed raw materials are lower than those of chicken manure. The six curved blade agitator has greater influence on the nearby flow field，and the dead zone of the six inclined blade disk turbine agitator is smallest. In addition，the six curved blade agitator has higher radial velocity than the six inclined blade agitator. © 2023 Science Press. All rights reserved.
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页码：542 / 549
页数：7
相关论文
共 23 条
  • [1] XU W Q, DONG H M, SHANG B, Et al., Experiment and calculation on the biochemical methane potential of typical livestock and poultry manure in anaerobic digestion［J］, Transactions of the Chinese Society of Agricultural Engineering, 37, 14, pp. 228-234, (2021)
  • [2] TIM H M., Anaerobic digestion/co- digestion kinetic potentials of different agro-industrial wastes： a comparative batch study for C/N optimisation［J］, Waste management, 71, pp. 663-674, (2018)
  • [3] TIAN Y F，, YANG L, ZHOU M R，, Et al., Research on performance improvement of biomethane via codigestion of corncob and fowl dung［J］, Chemical industry and enggineering progress, 38, 6, pp. 2898-2904, (2019)
  • [4] QIN K., Effect of carbon nitrogen ratio and inoculum on biogenic methane production from rice straw by anaerobic fermentation［D］, (2020)
  • [5] PAN Y B., Characteristics of biogas production by mixed fermentation of straw and livestock manure［D］, (2021)
  • [6] CAO X Q, YANG P, ZHAO Z D., Research progress of sludge rheology and numerical simulation of mixing characteristics in anaerobic digestion reactors［J］, Chinese journal of environmental engineering, 9, 3, pp. 997-1003, (2015)
  • [7] KURBAN R, ZHAO X Q, MA C Y., Research progress on rheological properties of biomass slurry［J］, Agricultural engineering, 10, 5, pp. 42-51, (2020)
  • [8] ZHU K Z，, LIU J Y，, ZHAO X，, Et al., Rheological properties and apparent viscosity research of cow dung fermentation raw material research［J］, Journal of agricultural mechanization research, 38, 12, pp. 260-263, (2016)
  • [9] ESHTIAGHI N，, Et al., The rheological behaviour of anaerobic digested sludge［J］, Water research, 45, 17, pp. 5675-5680, (2011)
  • [10] MICHAEL M，, MASSOUD R，, CHRISTIAN E，, Et al., Mixing non- Newtonian flows in anaerobic digesters by impellers and pumped recirculation［J］, Advances in engineering software, 115, pp. 194-203, (2018)
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