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阻挡室内污染气体外溢气压门适用条件的模拟研究

2018-09-13朱楚珂陈烨琳刘刚

科技视界 2018年14期

朱楚珂 陈烨琳 刘刚

【摘 要】随着社会进步和城镇化进程加快,城市人口急剧增加,城市生活垃圾的产量也逐年增加,垃圾场、生产车间等场所异味和有害气体外溢现象严重,对周边环境和人员健康带来极大的危害。本文研究一种阻挡污染气体外溢的气压门,使压缩空气通过气幕管在门缝处形成致密的气帘,有效阻挡污染区内部空气向外流动,采用Fluent软件模拟分析在气幕作用下,室内外压差不同时,该种阻挡室内污染气体外溢气压门的适用条件,为今后研究及相关工程设计提供依据。

【关键词】气幕;门缝;室内外压差;Fluent

中图分类号: TB6 文献标识码: A 文章编号: 2095-2457(2018)14-0036-002

DOI:10.19694/j.cnki.issn2095-2457.2018.14.015

Research of Applicability for Barometer Blocking Overflow of Polluted Air

ZHU Chu-ke CHEN Ye-lin LIU Gang

(College of Environmental Science and Engineering, Donghua University, Shanghai 201620,China)

【Abstract】With the rapid development of socialization and urbanization, the explosion of population has became a big problem along with urban garbage problem which bring a lot of negative effect to surrounding environment and living health. The essay focuses on a kind of barometer which could block the overflow of polluted air. It can make compresses air become a compact air curtain through the crack so that the polluted air can be blocked in case of overfalling outside. In this research, FLUENT is used as simulation software to study the operation situation of the barometer when the in-and-out environment has a different pressure.

【Key words】Air curtain; Crack; Differential pressure; FLUENT

0 引言

惡臭污染物即一切刺激嗅觉器官引起人们不愉快及损坏生活环境的气体物质[2],空气中如含0.1 %硫化氢就会迅速引起头疼晕眩等症状[3]。可以设计一种阻挡污染气体外溢的气压门[4]用以解决上述问题,现今使用的空气幕,有相当大数量的空气幕并没有达到预计的效果[5],本文研究的阻挡污染气体外溢的气压门,在门缝处出风形成气幕,阻挡室内污染气体的外溢,分析比较该种气压门的适用条件。

1 模型设置

房间布置及门缝处的三维模型如图1所示:

如图1所示,房间模型为长方体4m×3m×4m,门高即门缝高度3m,污染源用地面表示。房间顶部设通风口0.5m×0.5m。

2 确定判断依据

以硫化氢作为污染气体代表进行模拟分析,结合实际情况,车间空气内硫化氢的最高允许浓度为10mg/m3,转化为质量分数8e-6。硫化氢气体的嗅觉阈值为0.035mg/m3[6],转化为质量分数2.8e-8。……

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