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Numerical investigation of non-spherical particle deposition characteristics on filter media

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Building Simulation 2023年第8期16卷 1331-1343页

作者： Lumin Chen Ke Yuan fuping qian Zhimin Zheng Jinli Lu Yunlong Han School of Energy and Environment Anhui University of TechnologyMa'anshanAnhui 243002China School of Civil Engineering and Architecture Anhui University of TechnologyMa'anshanAnhui 243002China

In the building environment,PM2.5 seriously affects people’s health and quality of life,so it is necessary to study the particle deposition *** addition,it is essential for a thorough investigation of the dust removal mechanism to understand the non-spherical particles deposition *** stacking angle experiment was used to calibrate the discrete element simulation *** four simulation methods(CFD-DPM,CFD-DEM,API interface loading drag model based on EDEM software and EDEM simulation)were used to numerically simulate the non-spherical particles deposition *** optimal simulation method EDEM was applied to study the non-spherical particles deposition characteristics in filter media,which saves the calculation time *** this basis,the particle parameters on the particle deposition characteristics of filter media were *** results show that the deposition rate of non-spherical(special shape)particles with the same volume is basically consistent on the filter media,hence it is more realistic that the dust actual shape is simplified into the triangular-shaped *** the particle size increases,the number of deposited particles on the filter media *** the larger the particle size,the more dispersed the *** has a significant impact on the number of particles deposited on the filter media when the particle velocity is 0.1 m/*** particle deposits to the lower part of the filter media in the form of a parabola and deviates from the outlet seriously at 0.1 m/***,it has little effect on the number of particle deposition at the other velocities,and most particles are deposited on the upper part of the filter media with the increase of particle velocity.

关键词： particle deposition non-spherical particles calibration of stacking angle discrete element method

ftr82 is necessary for hair cell morphogenesis and auditory function during zebrafish development

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Journal of Genetics and Genomics 2023年第2期50卷 77-86页

作者： Guoli Yin fuping qian Jia Yao Ziyang Wang Xin Wang Dong Liu Cheng Wang Nantong Laboratory of Development and Diseases School of Life SciencesCo-innovation Center of NeuroregenerationMOE Key Laboratory of NeuroregenerationNantong UniversityNantongJiangsu 226019China

Damages of sensory hair cells(HCs)are mainly responsible for sensorineural hearing loss,while the pathological mechanism remains not fully understood due to the many potential deafness genes ***82,a member of the largely TRIMs family in fish,has been found specifically expressed in the otic vesicle while its function is still ***,we investigate the roles of ftr82 in HC development and hearing function utilizing the zebrafish *** results of in situ hybridization illustrate that ftr82 is always restricted to localize in otic vesicles at different *** defects of HCs are observed both in ftr82 morphants and mutants,including significantly decreased crista HCs,shortened cilia as well as remarkably reduced functional HCs in neuromasts,which could be successfully rescued by co-injection of exogenous ftr82 *** behavior assay of startle response indicates that larvae lacking of ftr82 exhibits lower sensitivity to external sound *** research reveals that the loss of HCs is mainly caused by cell apoptosis mediated by caspase-3 *** study demonstrates that ftr82 is a crucial hearing-related gene that regulates the HC morphogenesis and auditory function performing,which provides new insight into the rapid identification of the deafness gene.

关键词： ftr82 TRIM protein Hair cell development Hearing loss Zebrafish

Effect of interaction between different CeO_(2)plane and platinum nanoparticles on catalytic activity of Pt/CeO_(2)in toluene oxidation

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Journal of Rare Earths 2022年第11期40卷 1743-1750,I0003页

作者： Shengsheng Chang Yong jia Yiqing Zeng fuping qian Lina Guo Shenghua Wu Jinli Lu Yunlong Han School of Energy and Environment Anhui University of TechnologyMa'anshan 243002China School of Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Civil Engineering and Architecture Anhui University of TechnologyMa'anshan 243002China

The plane exposure of support vitally affects the catalytic performance of the *** this work,CeO_(2)nanorods((110)plane exposure),nano-octahedrons((111)plane exposure)and nano-cubes((100)plane exposure)were prepared as the supports of Pt/CeO_(2)samples to investigate the effect of CeO_(2)plane exposure on total toluene *** reveal that the(110)plane of CeO_(2)is more helpful to the dispersion of Pt species,followed by(111)*** improved dispersion of Pt species can enhance the metal-supports interaction,which promotes the electron transfer of CeO_(2)carrier to Pt nanoparticles and the adsorption-activation of O_(2),thereby facilitating the total oxidation of toluene via the Langmuir-Hinshelwood(L-H)***,Pt/CeO_(2)-r(nanorods)sample expresses excellent catalytic performance of toluene ***,the procedure of toluene total oxidation was studied by in-situ diffuse reflectance infrared Fourier transform(DRIFT)*** expect that this work can contribute to the development of an effective sample for the decomposition of volatile organic compounds(VOCs).

关键词： CeO_(2)plane Pt/CeO_(2) Toluene oxidation Metal-supports interaction Rare earths

An Experimental and Numerical Study on the Cleaning of Pleated Bag Filters Using Low-Pressure Pulsed-Jets

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Fluid Dynamics & Materials Processing 2022年第1期18卷 41-56页

作者： Lumin Chen Wanying Sun fuping qian Can Fang Zhimin Zheng qianshuang Zhuang Yunlong Han Jinli Lu School of Energy and Environment Anhui University of TechnologyMa’anshan243002China School of Civil Engineering and Architecture Anhui University of TechnologyMa’anshan243002China Suzhou Hengqing Environmental Protection Technology Co. Ltd.Zhangjiagang215600China

Pulsed-jet cleaning is recognized as the most efficient method to regenerate bag dust collectors traditionally used in industrial processes to control the emission of *** this study,non-woven needle felt filter bags with and without a film coating material have been analyzed considering different geometries(different number N of pairs of pleated filter bag sides)in the frame of dedicated low-pressure pulsed-jet cleaning *** flow structure inside the bag and the response characteristics of its wall have also been analyzed numerically through a computational fluid-dynamics/structural-dynamics(CFD-CSD)unidirectional fluid-solid coupling *** shown by the experiments,the peak pressure(P_(0))on the wall of the filter bag with N=8 and 12 is higher,which indicates dust can be removed more effectively in these *** peak pressure on the wall increases first and then decreases along the direction of the bag length,while the peak pressure of the pleated filter bag with nonwoven needled felt film coating is greater than that without film coating.A comprehensive analysis of the time variation of acceleration,deformation,strain,stress and other factors,has led to the conclusion that the pleated filter bag with N=12 would be the optimal choice.

关键词： Pleated filter bag dust cleaning performance low-pressure pulsed-jet cleaning peak pressure unidirectional fluidstructure coupling

A Model for Predicting the Erosion Rate Induced by the Use of a Selective Catalytic Reduction Denitrification Technology in Cement Kilns Flue Gas

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Fluid Dynamics & Materials Processing 2023年第8期19卷 1997-2011页

作者： Yihua Gao fuping qian Yi Sun Yue Wu Shenghua Wu Jinli Lu Yunlong Han Naijin Huang School of Civil Engineering and Architecture Anhui University of TechnologyMa’anshan243032China School of Energy and Environment Anhui University of TechnologyMa’anshan243002China Anhui Weida Environment Protection Science&Technology Co. Ltd.Hefei230041China

Selective catalytic reduction(SCR)is a technology by which nitrogen oxides are converted with the aid of a catalyst into diatomic nitrogen and *** is known that the catalyst can be easily eroded if a cement kiln with a high-dust content is *** understand this process,numerical simulations have been carried out considering a single catalyst channel in order to study the collision and erosion of fly ash and catalysts at meso *** on a response surface methodology,the effects of five factors on the erosion rate have been studied,namely,the catalyst particle velocity,the particle size,the particle concentration,the incidence angle and the catalyst *** results show that the influence of particle velocity,particle size and particle concentration is statistically significant and the particle size and incidence angle have a significant effect on the erosion rate.A quadratic polynomial prediction model for the erosion rate of honeycomb catalysts in cement kiln SCR reactors is finally proposed to support the future optimization of these systems.

关键词： Cement kiln SCR denitrification catalyst erosion numerical simulation

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基于响应曲面法旋风分离器的自然旋风长

东南大学学报（自然科学版） 2006年第2期36卷 247-251页

作者：钱付平章名耀东南大学洁净煤发电与燃烧技术教育部重点实验室南京210096

利用商业计算流体力学软件Fluent6.1对不同结构尺寸以及运行条件下旋风分离器内部气相流场进行了数值模拟,基于响应曲面法并利用统计软件M initab V14得到了旋风分离器自然旋风长新的预测模型.对预测模型分析后表明,除了入口面积和排气... 详细信息

利用商业计算流体力学软件Fluent6.1对不同结构尺寸以及运行条件下旋风分离器内部气相流场进行了数值模拟,基于响应曲面法并利用统计软件M initab V14得到了旋风分离器自然旋风长新的预测模型.对预测模型分析后表明,除了入口面积和排气芯管直径影响自然旋风长外,入口风速、旋风器高度以及排气芯管的插入深度也会不同程度地影响自然旋风长.由于自然旋风长预测模型考虑了更多的影响因素,和以前的模型比较能更好地反映旋风分离器的结构尺寸及运行条件对其性能的影响.

关键词：响应曲面法旋风分离器自然旋风长预测模型

Cu-TiO_2光催化涂料的制备及降解甲醛效果研究

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涂料工业 2011年第5期41卷 46-48,56页

作者：张浩钱付平安徽工业大学建筑工程学院安徽马鞍山243002

自制Cu-TiO2光催化涂料,重点对所制备的Cu-TiO2光催化涂料在环境测试舱模拟可见光源的室内环境条件下进行降解甲醛研究。利用X射线衍射和紫外-可见分光光谱表征Cu-TiO2光催化剂的微晶尺寸、晶体结构与光学性能。分别讨论分析了光催化剂... 详细信息

自制Cu-TiO2光催化涂料,重点对所制备的Cu-TiO2光催化涂料在环境测试舱模拟可见光源的室内环境条件下进行降解甲醛研究。利用X射线衍射和紫外-可见分光光谱表征Cu-TiO2光催化剂的微晶尺寸、晶体结构与光学性能。分别讨论分析了光催化剂种类、光催化剂掺杂含量、室内环境湿度、室内环境光源和室内环境光照时间对Cu-TiO2光催化涂料降解效果的影响。结果表明:掺杂Cu的TiO2光催化涂料可以提高对可见光源的响应,在光催化剂掺杂含量2%,室内环境湿度45%时效果最佳。

关键词： Cu—TiO2 光催化涂料甲醛建筑材料

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二氧化碳制冷系统毛细管的设计及实验研究

化工学报 2011年第10期62卷 2753-2758页

作者：王栋李蒙戚利利钱付平安徽工业大学建筑工程学院安徽马鞍山243002 丹佛斯(上海)自动控制有限公司上海201103 上海理工大学能源与动力工程学院上海200093

利用绝热毛细管内制冷剂流动特性的数学模型,在给定运行工况下,针对工质为二氧化碳的制冷系统用微元法编制了计算程序,模拟了二氧化碳毛细管内的流动曲线,得到毛细管流量与尺寸及进口压力的变化关系。搭建了小型二氧化碳跨临界循环制冷... 详细信息

利用绝热毛细管内制冷剂流动特性的数学模型,在给定运行工况下,针对工质为二氧化碳的制冷系统用微元法编制了计算程序,模拟了二氧化碳毛细管内的流动曲线,得到毛细管流量与尺寸及进口压力的变化关系。搭建了小型二氧化碳跨临界循环制冷系统,通过实验研究,得出了该毛细管在不同的高压侧压力及气冷器出口温度下的流量特性曲线。将实验结果与模拟结果进行对比,结果表明:流量随着气冷器出口温度和高压侧压力的变化趋势相同,且实验数据与模拟计算值基本吻合。本研究可为二氧化碳制冷系统毛细管的设计提供理论指导。

关键词：二氧化碳制冷系统毛细管流量特性

表面覆膜多层复合纤维滤料过滤性能的数值研究

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环境科学学报 2010年第12期30卷 2392-2398页

作者：钱付平王海刚陈光安徽工业大学建筑工程学院马鞍山243002

根据Matlab软件和数值计算前处理软件Gambit中的Journal文件建立了多层复合纤维滤料模型,利用计算流体动力学(CFD)技术对沿气流方向具有不同纤维填充密度及直径分布的滤料内部的气-固两相流动特性进行了数值研究,计算了不同运行条件下... 详细信息

根据Matlab软件和数值计算前处理软件Gambit中的Journal文件建立了多层复合纤维滤料模型,利用计算流体动力学(CFD)技术对沿气流方向具有不同纤维填充密度及直径分布的滤料内部的气-固两相流动特性进行了数值研究,计算了不同运行条件下滤料的压力损失及过滤效率,并将数值计算值和经典模型及实验关联式的计算值进行了比较.结果表明,压力损失的数值计算预测值和实验关联式计算值吻合较好,误差在2%以内.随着迎面风速的增加,压力损失呈线性增加.相对于填充密度,纤维直径对压力损失和过滤效率的影响更显著.不同结构滤料过滤效率的数值计算结果和理论模型的计算值变化趋势基本一致.不同迎面风速下,过滤效率都是先减小后增大,对于颗粒直径dp≤0.05μm的颗粒,随着风速的增大,过滤效率减小;对于dp≥0.5μm的颗粒,过滤效率变化趋势正好相反.迎面风速不同,过滤效率最低点出现的位置也不同.对于小颗粒,风速越小,扩散作用起主导作用;而对于大颗粒,风速越大,惯性作用越明显.过滤效率最低点出现在扩散作用逐渐弱化,惯性作用刚刚开始加强的区域.多层复合滤料在结构上采用纤维直径逐层加大的梯次结构时,能够获得较高的过滤效率.而在多层复合滤料表面覆膜后过滤效率平均增加约13%.

关键词：多层复合纤维滤料表面覆膜过滤性能数值模拟