학술논문
厌氧消化流场可视化技术研究进展 / Research progress on the visualization of flow field of anaerobic digestion
Document Type
Academic Journal
Author
胡玉瑛; 王鑫; 张世豪; 胡锋平; 汪楚乔; 吴静; 许莉; 许高平; HU Yuying; WANG Xin; ZHANG Shihao; HU Fengping; WANG Chuqiao; WU Jing; XU Li; XU Gaoping
Source
化工进展 / Chemical Industry and Engineering Progress. 42(12):6535-6543
Subject
Language
Chinese
ISSN
1000-6613
Abstract
厌氧消化是一种可持续的有机废弃物处理处置技术,在降解有机废弃物的同时可以产生可再生能源沼气,是一种环境友好型处理技术.然而,厌氧消化系统内基质具有复杂的流变特性,其黏度高、流动性差,阻碍了反应的顺利进行.因此,研究厌氧消化的流场特性有助于了解厌氧消化系统内部流态,强化运行效果与过程稳定性.本文分析了厌氧消化基质的特性与适用的流变模型,总结了计算流体力学(CFD)数值模拟过程中的模型选取以及粒子图像测速法(PIV)和正电子发射粒子跟踪(PEPT)技术的应用现状.获得可靠的流场可视化结果,需要在考量厌氧消化基质剪切稀化特性的同时关注黏弹性、触变性等其他流变特性.在今后的研究中,应综合运用多种流场可视化技术对厌氧消化水力学特性进行优化.
Anaerobic digestion is a sustainable technology for organic waste treatment and disposal,which can produce renewable energy biogas while degrading organic waste.It is an environmentally friendly treatment technology.However,the substrate in anaerobic digestion system has complex rheological characteristics,and its high viscosity and poor flowability hinder the stable operation of the reaction.Therefore,research on flow field characteristics of anaerobic digestion can contribute to the understanding in internal flow pattern of anaerobic digestion system and improve the operating results and process stability.The characteristics of the substrate in anaerobic digestion and applicable rheological models are analyzed,and current status of the rheological model selection in numerical computational fluid dynamics(CFD)simulation process as well as application of particle image velocimetry(PIV)and positron emission particle tracking(PEPT)techniques are summarized.To obtain reliable flow field visualization results,it is necessary to pay attention to other rheological properties such as viscoelasticity and thixotropy while considering the shear-thinning properties of anaerobic digestion matrices.In future research,multiple flow field visualization techniques should be used in combination to optimize the hydrodynamic properties of anaerobic digestion.
Anaerobic digestion is a sustainable technology for organic waste treatment and disposal,which can produce renewable energy biogas while degrading organic waste.It is an environmentally friendly treatment technology.However,the substrate in anaerobic digestion system has complex rheological characteristics,and its high viscosity and poor flowability hinder the stable operation of the reaction.Therefore,research on flow field characteristics of anaerobic digestion can contribute to the understanding in internal flow pattern of anaerobic digestion system and improve the operating results and process stability.The characteristics of the substrate in anaerobic digestion and applicable rheological models are analyzed,and current status of the rheological model selection in numerical computational fluid dynamics(CFD)simulation process as well as application of particle image velocimetry(PIV)and positron emission particle tracking(PEPT)techniques are summarized.To obtain reliable flow field visualization results,it is necessary to pay attention to other rheological properties such as viscoelasticity and thixotropy while considering the shear-thinning properties of anaerobic digestion matrices.In future research,multiple flow field visualization techniques should be used in combination to optimize the hydrodynamic properties of anaerobic digestion.