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斜巷转载点粉尘污染规律及多断面雾幕控尘技术研究

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金属矿山 2024年第5期 118-125页

作者：荆德吉鲍春花刘鸿威阚琦笙杜鹏宇辽宁工程技术大学安全科学与工程学院辽宁阜新123000 矿山热动力灾害与防治教育部重点实验室辽宁葫芦岛125105 辽宁工程技术大学鄂尔多斯研究院内蒙古鄂尔多斯017000

针对斜巷转载点粉尘污染严重的问题,运用COMSOL软件对棋盘井煤矿3号转载点进行了几何建模,并基于计算流体力学(CFD)粒子追踪模型、有限元法和k-ε湍流模型,计算了3号转载点风流流线分布、速度多切面分布以及粉尘粒子运动轨迹,研究了生... 详细信息

针对斜巷转载点粉尘污染严重的问题,运用COMSOL软件对棋盘井煤矿3号转载点进行了几何建模,并基于计算流体力学(CFD)粒子追踪模型、有限元法和k-ε湍流模型,计算了3号转载点风流流线分布、速度多切面分布以及粉尘粒子运动轨迹,研究了生产工作时3号转载点处风流变化及粉尘运移规律,并针对性地提出了一种多断面雾幕控尘技术。该技术基于螺旋雾幕控尘、超音速隔尘原理,可形成距离长、覆盖范围广的雾幕以最大限度包裹粉尘颗粒,实现粉尘高效净化。最后通过控尘试验及在棋盘井煤矿3号转载点现场应用,验证了该技术的高效降尘特性以及可靠性。研究结果表明:风流分布主要受皮带速度、牵引力和诱导气流的综合作用影响,沿水平和垂直方向分层分布,形成密集且平均速度为0.5 m/s的涡流;粉尘易受涡流影响向四周扩散,主要分布在下风侧,粒径为5~15μm更容易受风流牵引扩散,聚集于工人呼吸带高度,污染严重。将该技术进行控尘试验和现场应用后,全尘和呼尘降尘效率分别高达93.65%、85.59%以上。

关键词：转载点数值模拟多断面雾幕粉尘运移降尘效率

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A novel approach for VOC source apportionment combining characteristic factor and pattern recognition technology in a Chinese industrial area

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Journal of Environmental Sciences 2022年第11期34卷 25-37页

作者： deji jing Nana Cheng Cheng Zhang Ziwei Chen Xingnong Cai Sujing Li jingkai Zhao Qiaoli Wang Wei Li Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou 310027China College of Environment Zhejiang University of TechnologyHangzhou 310032China

Volatile organic compound(VOC) emission control and source apportionment in small-scale industrial areas have become key topics of air pollution control in China. This study proposed a novel characteristic factor and pattern recognition(CF-PR) model for VOC source apportionment based on the similarity of characteristic factors between sources and receptors.A simulation was carried out in a typical industrial area with the CF-PR model involving simulated receptor samples. Refined and accurate source profiles were constructed through in situ sampling and analysis, covering rubber, chemicals, coating, electronics, plastics, printing, incubation and medical treatment industries. Characteristic factors of n-undecane,styrene, o-xylene and propane were identified. The source apportionment simulation results indicated that the predicted contribution rate was basically consistent with the real contribution rate. Compared to traditional receptor models, this method achieves notable advantages in terms of refinement and timeliness at similar accuracy, which is more suitable for VOC source identification and apportionment in small-scale industrial areas.

关键词： VOC Source apportionment Characteristic factors Pattern recognition Industrial areas

A supplementary assessment system of AQI-V for comprehensive management and control of air quality in chemical industrial parks

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Journal of Environmental Sciences 2023年第8期130卷 114-125页

作者： Qiaoli Wang Dongping Sheng Chengzhi Wu deji jing Nana Cheng Xingnong Cai Sujing Li jingkai Zhao Wei Li Jianmeng Chen College of Environment Zhejiang University of TechnologyHangzhou 310032China Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou 310027China Trinity Consultants Inc.(China office)Hangzhou 310012China Zhejiang Ocean University ZhoushanZhejiang Province 316022China

Volatile organic compounds(VOCs)are the dominant pollutants in industrial ***,they are not generally considered as part of the air quality index(AQI)system,which leads to a biased assessment of pollution in industrial *** this study,a supplementary assessment system of AQI-V was established by analyzing VOCs characteristics with vehicle-mounted PTR-TOFMS instrument,correlation analysis and the standards *** hourly and daily scenarios were considered,and the hierarchical parameter setting was further optimized by field *** hourly and daily assessments revealed the evaluation factors for the discriminability of different air quality levels,practiced value for regional air quality improvement,and the reservation of general dominant ***,the universality testing in ZPIP successfully recognized most of the peaks,with 54.76%,38.39%and 6.85%for O_(3),VOCs and NO_(2) as the dominant pollutant,and reflected the daily ambient air quality condition,togetherwith the dominant *** AQI-V systemwith VOCs sub-index is essential for air quality evaluation in industrial parks,which can further provide scientific support to control the pollution of VOCs and the secondary pollutant,therefore significantly improve the air quality in local industrial parks.

关键词： Air quality index Industrial parks,VOCs sub-index AQI-V system Scenario analysis

An integrated chemical mass balance and source emission inventory model for the source apportionment of PM2.5 in typical coastal areas

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Journal of Environmental Sciences 2020年第6期32卷 118-128页

作者： Nana Cheng Cheng Zhang deji jing Wei Li Tianjiao Guo Qiaoli Wang Sujing Li Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou310027China

The source apportionment of PM2.5 is essential for pollution *** view of the weaknesses of individual models,we proposed an integrated chemical mass balancesource emission inventory(CMB-SEI)model to acquire more accurate ***,the SEI of secondary component precursors(SO2,NOx,NH3,and VOCs)was compiled to acquire the emission ratios of these sources for the ***,a regular CMB simulation was executed to obtain the contributions of primary particle sources and secondary components(SO4^2-,NO3^-3,NH4^+,and SOC).Afterwards,the contributions of secondary components were apportioned into primary sources according to the source emission *** final source apportionment results combined the contributions of primary sources by CMB and *** integrated approach was carried out via a case study of three coastal cities(Zhoushan,Taizhou,and Wenzhou;abbreviated WZ,TZ,and ZS)in Zhejiang Province,*** regular CMB simulation results showed that PM2.5 pollution was mainly affected by secondary components and mobile *** SEI results indicated that electricity,industrial production and mobile sources were the largest contributors to the emission of PM2.5 gaseous *** simulation results of the CMB-SEI model showed that PM2.5 pollution in the coastal areas of Zhejiang Province presented complex pollution characteristics dominated by mobile sources,electricity production sources and industrial production *** to the results of the CMB and SEI models alone,the CMB-SEI model completely apportioned PM2.5 to primary sources and simultaneously made the results more accurate and reliable in accordance with local industrial characteristics.

关键词： Integrated model Chemical mass balance Source emission inventory Source apportionment PM2.5

Numerical simulation of the dimensional transformation of atomization in a supersonic aerodynamic atomization dust-removing nozzle based on transonic speed compressible flow

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International Journal of Coal Science & Technology 2020年第3期7卷 597-610页

作者： Tian Zhang deji jing Shaocheng Ge Jiren Wang Xiangxi Meng ShuaiShuai Ren College of Safety Science and Engineering Liaoning Technical UniversityFuxinChina Research Institute of Safety Science and Engineering Liaoning Technical UniversityFuxinChina Thermodynamic Disasters and Control of Ministry of Education Liaoning Technical UniversityFuxinChina Safety and Emergency Management Engineering College Taiyuan University of TechnologyTaiyuanChina

To simulate the transonic atomization jet process in Laval nozzles,to test the law of droplet atomization and distribution,to find a method of supersonic atomization for dust-removing nozzles,and to improve nozzle efficiency,the finite element method has been used in this study based on the COMSOL computational fluid dynamics *** study results showed that the process cannot be realized alone under the two-dimensional axisymmetric,three-dimensional and three-dimensional symmetric models,but it can be calculated with the transformation dimension method,which uses the parameter equations generated from the two-dimensional axisymmetric flow field data of the three-dimensional *** visualization of this complex process,which is difficult to measure and analyze experimentally,was realized in this *** physical process,macro phenomena and particle distribution of supersonic atomization are analyzed in combination with this *** rationality of the simulation was verified by experiments.A new method for the study of the atomization process and the exploration of its mechanism in a compressible transonic speed flow field based on the Laval nozzle has been provided,and a numerical platform for the study of supersonic atomization dust removal has been established.

关键词： Aerodynamic atomization Dust-removing Laval nozzle Compressible flow field Transonic speed Dimension transform

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煤矿胶带转载点多径向旋流卷吸除尘技术

煤炭学报 2023年第11期48卷 4261-4268页

作者：马明星荆德吉张天葛少成刘鸿威蒋卓张强辽宁工程技术大学安全科学与工程学院辽宁阜新123000 矿山热动力灾害与防治教育部重点实验室辽宁阜新123000 太原理工大学安全与应急管理学院山西太原030024 辽宁铁法能源有限责任公司大兴煤矿辽宁铁岭112710

胶带转载点粉尘危害与治理是实现煤矿高效、安全、清洁生产的重要问题之一。为解决转载点粉尘污染问题,降低转载点粉尘危害,根据旋流卷吸理论,提出胶带转载点多径向旋流卷吸除尘技术。该技术是在竖直设立的落料管侧壁上安设一定数量和... 详细信息

胶带转载点粉尘危害与治理是实现煤矿高效、安全、清洁生产的重要问题之一。为解决转载点粉尘污染问题,降低转载点粉尘危害,根据旋流卷吸理论,提出胶带转载点多径向旋流卷吸除尘技术。该技术是在竖直设立的落料管侧壁上安设一定数量和射流角度的进风口,抽风口设置在落料管正上方。工作原理是落料管侧壁射入的风流遇到侧壁改变方向,进风口射流相互作用下,在落料管内形成向上流动的旋流,抽风口负压牵引旋流携带粉尘流入除尘器,实现粉尘净化。通过建立高度仿真的3D实体模型和搭建胶带转载点多径向旋流卷吸除尘技术试验平台,采用数值模拟和试验测试相结合对转载点内风流分布、粉尘运移分布进行研究。数值模拟和试验测试中在落料管4个侧壁上分别设有8个倾斜向上且与水平面夹角为10°的进风口,导料槽上设有4个进风口,进风口朝向与下级胶带上粒子释放位置的圆相切。根据旋流卷吸理论得出:落料管上进风风速越大,落料管边界与中心压力差越大,对粉尘的聚集效果越好。模拟结果得出:多径向旋流卷吸除尘技术最佳进风速度为8 m/s,此时可收集下落过程中粒径小于50μm的粉尘和煤料与下级胶带撞击产生的粒径小于30μm的粉尘。对比试验中下落前后煤料分散度得出:除尘技术应用后下级胶带上煤料中粒径小于50μm的颗粒占比减小47.96%,粒径小于5μm的颗粒减小44.62%,降低煤料中有害颗粒的占比;通过测定导料槽两端及入料口处粉尘质量浓度,试验确定多径向旋流卷吸除尘技术最佳进风速度为8 m/s,此时,导料槽左右两端及入口处粉尘质量浓度最低,除尘效率分别为97.71%和99.92%,转载点整体的除尘效率可达95%以上。证明转载点多径向旋流卷吸除尘技术可以解决转载点粉尘污染难题,改善转载点处工作环境。

关键词：胶带转载点粉尘多径向旋流卷吸除尘技术分散度除尘效率

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掘进工作面不同通风方式的粉尘运移规律研究

金属矿山 2023年第7期 113-119页

作者：荆德吉阚琦笙张天贾鑫辽宁工程技术大学安全科学与工程学院辽宁阜新123000 矿山热动力灾害与防治教育部重点实验室辽宁葫芦岛125105 国家卫生健康委职业安全卫生研究中心北京102308

为了解决掘进工作面粉尘污染严重的问题,运用COMSOL软件对某矿1019掘进工作面进行了几何模型构建,并基于k-ε湍流模型和流体流动颗粒跟踪模型,计算了在压入式和长压短抽通风方式下的速度切面、风流流线分布以及粉尘粒子的运移轨迹,分析... 详细信息

为了解决掘进工作面粉尘污染严重的问题,运用COMSOL软件对某矿1019掘进工作面进行了几何模型构建,并基于k-ε湍流模型和流体流动颗粒跟踪模型,计算了在压入式和长压短抽通风方式下的速度切面、风流流线分布以及粉尘粒子的运移轨迹,分析了两种通风方式对粉尘粒子运移的影响,并研究了掘进工作面在两种通风方式下的粉尘运移规律。结果表明:压入式通风方式下,由压风筒将新鲜空气压入巷道内,迫使掘进工作面的粉尘随风流排出巷道,导致掘进机前方区域风流曲线非常密集形成多处涡流导致粉尘粒子在涡流处聚集,同时部分粉尘粒子沉淀在巷道底部,还有部分粉尘粒子沿右侧巷道壁面向后方移动,其控尘效果较差;长压短抽通风方式下,两风筒前方区域速度较大,且压风筒和抽风筒之间风流流线密集;压风筒吹出气流裹挟粉尘粒子移动,同时利用抽风筒的抽吸作用将粉尘粒子吸入排出巷道,与压入式通风方式相比长压短抽的降尘效果更好。

关键词：掘进工作面压入式通风长压短抽数值模拟粉尘运移

选煤厂并行带式输送机运转系统煤尘污染规律研究

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煤矿安全 2023年第1期54卷 16-21页

作者：荆德吉马纪闯张天任帅帅辽宁工程技术大学安全科学与工程学院辽宁阜新123000 矿山热动力灾害与防治教育部重点实验室(辽宁工程技术大学) 辽宁阜新123000

为了解决选煤厂并行带式输送机运转系统粉尘污染问题,使用k-ε湍流模型和COMSOL软件,建立了黄玉川选煤厂并行带式输送机运转系统数值模型,计算获得了其风流的分布规律;分析诱导气流及走廊风速对其风流场的影响,确定了选煤厂并行带式输... 详细信息

为了解决选煤厂并行带式输送机运转系统粉尘污染问题,使用k-ε湍流模型和COMSOL软件,建立了黄玉川选煤厂并行带式输送机运转系统数值模型,计算获得了其风流的分布规律;分析诱导气流及走廊风速对其风流场的影响,确定了选煤厂并行带式输送机运转系统粉尘污染的风流影响机理。研究表明:走廊风速大小直接决定系统风流场的流速,走廊风速越大整个系统风流速度越大;诱导气流的大小决定风流场为单涡流风流场、双涡流风流场或无涡流风流场。针对性的提出方案减少因产生涡流导致粉尘污染严重的问题,设计针对性湿式降尘方案,并在黄玉川选煤厂安装使用,车间内全尘及呼尘降尘效率均达到90%以上。

关键词：选煤厂并行带式输送机系统降尘方案风流分布粉尘污染

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超细螺旋雾化喷头降尘技术及其应用

中国安全科学学报 2022年第11期32卷 82-89页

作者：荆德吉王志恒葛少成张天任帅帅贾鑫辽宁工程技术大学安全科学与工程学院辽宁阜新123000 矿山热动力灾害与防治教育部重点实验室(辽宁工程技术大学) 辽宁阜新123000 太原理工大学安全与应急管理工程学院山西太原030024

为解决煤矿粉尘污染问题,根据气水喷雾原理与涡旋气流生成特性,研制一种雾滴粒径小、降尘能力强的新型超细螺旋雾化喷头。首先,利用数值模拟软件探究不同参数下风流导向器内部风流场速度流线分布特征,得到风流导向器最佳螺旋效果参数;然... 详细信息

为解决煤矿粉尘污染问题,根据气水喷雾原理与涡旋气流生成特性,研制一种雾滴粒径小、降尘能力强的新型超细螺旋雾化喷头。首先,利用数值模拟软件探究不同参数下风流导向器内部风流场速度流线分布特征,得到风流导向器最佳螺旋效果参数;然后,搭建试验平台,测定超细螺旋雾化喷头性能参数;最后,通过超声波干雾抑尘效率对比试验,研究超细螺旋雾化喷头降尘性能,设计一套高效除尘设施,并将其应用于敏东一矿06回风巷。结果表明:当螺旋槽体与锥形壁面的夹角α为30°、风流导向器顶面直径与其高度比d为1.25时,风流导向器定向风流螺旋效果最佳;喷雾压力为0.4 MPa时,超细螺旋雾化喷头的雾化角最大,雾滴数量中占比90%的雾滴直径小于19.7μm,综合雾化性能最优,此时全尘降尘效率为92.18%,较超声波干雾抑尘全尘降尘效率提高10.21%。以超细螺旋雾化喷头为核心的全断面螺旋气动雾幕对呼吸性粉尘的降尘效率为88.8%~91.58%。

关键词：超细螺旋雾化喷头螺旋气流雾化性能回风巷降尘效率