层式通风模式下全地下地铁检修库污染物控制效果研究  

Preliminary Study on Odor Pollution of Volatile Organic Compounds in Subway Stations:Case Studies in Southern China

作　　者：尹涵 毕海权[1] 王宏林[1] Yin Han;Bi Haiquan;Wang Honglin(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031)

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《制冷与空调（四川）》2023年第4期512-518,共7页Refrigeration and Air Conditioning

摘　　要：针对全地下地铁检修库工作区空气污染物局部超标、送风可及性差、气流不畅的问题及自然通风条件缺乏、风口布置固定等局限性,提出集中于下部作业区的单向流层式通风方式。通过数值模拟,研究对比了单向流层式通风、射流混合通风模式下工作区有机挥发性污染气体的控制效果及流场特征。研究结果表明,单向流层式通风模式对地铁检修库下部空间污染气体的控制效果明显优于以射流为主导的混合通风模式,当换气次数分别为6h^(-1)、8h^(-1)、10h^(-1),层式通风模式下污染总积累量较射流混合通风模式分别降低了38%、62.2%及62%,控制区呼吸层面污染气体浓度分别降低了9.1倍、16.1倍及12.4倍,表现出较好的通风控制及污染排除能力,为解决全地下地铁检修库近地面区域、敞开式作业污染气体防护难题提供了新的通风设计思路。In order to solve the problems of local excessive air pollution,poor air supply accessibility,poor airflow,lack of natural ventilation conditions,fixed tuyere arrangement and other limitations in the working area of the underground subway overhaul warehouse,a one-way flow layer ventilation mode concentrated in the lower working area was proposed.By means of numerical simulation,this paper studies and compares the control effect and flow field characteristics of organic volatile pollution gas in working area under one-way flow layer ventilation and jet mixed ventilation mode.The results show that the one-way layer ventilation mode is better than the mixed ventilation mode dominated by jet flow in terms of the control effect of polluted gas in the lower space of the subway maintenance warehouse.When the air exchange times were 6h^(-1),8h^(-1) and 10h^(-1),respectively,the total pollution accumulation under the layer ventilation mode was reduced by 38%,62.2% and 62% compared with the jet mixed ventilation mode,respectively,and the pollution gas concentration at the respiratory level in the control area was reduced by 9.1 times,16.1 times and 12.4 times,respectively.Layer ventilation shows a better ability of risk control and pollution removal,which provides a new ventilation design idea for solving the problem of pollution gas protection in the near-ground area and open operation of all underground subway overhaul warehouses.

关 键 词：全地下地铁检修库 污染物 气流组织 层式通风 数值模拟 

分 类 号：X820.3[环境科学与工程—环境工程]