选煤厂筛分车间粉尘浓度分布规律数值研究  

Numerical study on dust concentration distribution in screening workshop of coal preparation plant

作　　者：刘茜尧 连清旺[2] LIU Xiyao;LIAN Qingwang(School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of In-situ Property Improving Mining of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学安全与应急管理工程学院,山西太原030024 [2]太原理工大学原位改性采矿教育部重点实验室,山西太原030024

出　　处：《矿业安全与环保》2023年第1期37-41,共5页Mining Safety & Environmental Protection

基　　金：山西省科技成果转化项目(201804D131037)。

摘　　要：针对选煤厂筛分车间粉尘污染严重的问题,以马脊梁选煤厂为研究对象,采用数值模拟与现场试验相结合的方法,使用Fluent软件对筛分车间振动筛处粉尘运移规律进行模拟。分析粉尘在风流作用下随时间和空间的运动变化规律,提出应用喷雾与密闭罩相结合的方法治理粉尘。研究结果表明:由落料管落料和振动筛工作产生的粉尘大量聚积在振动筛筛面,粉尘质量浓度最高达60 mg/m3,随着与振动筛距离的增大粉尘浓度逐渐降低;车间内风流流速随着运移距离的增大而减小;将喷雾与密闭罩相结合的粉尘治理方法应用到现场,平均降尘效率达92.3%。Aiming at the serious dust pollution in the screening workshop of coal preparation plant, taking Majiliang Coal Preparation Plant as the research object, by combining numerical simulation with field test, the dust migration law at the vibrating screen of the screening workshop was simulated by using Fluent software. The migration law of dust movement with time and space under the action of air flow was analyzed. A method combining spray and closed cover was put forward to control dust. The results show that a large amount of dust generated by the blanking pipe and the vibrating screen is concentrated on the screen surface of the vibrating screen and the dust mass concentration is up to 60 mg/m~3. The dust concentration decreases gradually with the increase of the distance from the vibrating screen. The velocity of air flow in the workshop decreases with the increase of migration distance. The dust control method combined with spray and closed cover is applied to the field and the average dust removal efficiency reaches 92.3%.

关 键 词：选煤厂 筛分车间 振动筛 粉尘运移 FLUENT 数值模拟 粉尘治理 

分 类 号：TD714[矿业工程—矿井通风与安全]