摘要
为分析排污管网硫化氢气体的分布规律和影响因素,对北京市污水检查井硫化氢气体浓度进行现场检测和连续监测,分析了硫化氢气体分布的区域特征及硫化氢气体沿检查井深度和流向的变化规律,同时采用统计分析方法研究了硫化氢气体质量浓度分布的影响因素,并探究了不同沟段硫化氢气体随时间、季节的变化规律。结果表明,大部分检查井硫化氢气体质量浓度存在超标现象;硫化氢气体质量浓度随检查井的深度而逐渐增大,下部硫化氢气体质量浓度高于中部和上部;跌水和支流汇入检查井的硫化氢气体质量浓度显著增大;硫化氢气体质量浓度较大的检查井,其氨气质量浓度也较高;检查井内硫化氢气体质量浓度受时段和季节的影响较大。
The paper has conducted an in-site detection and investigation of the 63 inspection wells of 10 trenches in Beijing so as to trace the distribution and influential factors of the hydrogen sulfide gas in the municipal sewage pipes.At the same time,we have also been keeping on with the in-site continuous monitoring activities in the 6 inspection wells of the 3 trenches in Beijing area.Based on the afforementioned investigation and inspection activities,the paper has made a detailed analysis of the distributive features of the hydrogen sulfide mass concentration in the different trenches and pursued the variation of the hydrogen sulfide mass concentration rates in the inspection wells and the sewage flowing directions while emphasizing the observation of the effects of the sewage drops,the branch entry,the time and season on the hydrogen sulfide mass concentration rates,in addition to the exploration of the relation between the hydrogen sulfide and other parameters.The results of the above mentioned studies show that the hydrogen sulfide mass concentration trends in each trench are different,though the said concentration in most of trenches tends to be high.Of all the 63 inspection wells,the maximum hydrogen sulfide mass concentration rate is over 10 mg/m3,which accounts for 58.7%.And,comparativley speaking,the wells distributed in the residential areas and the comprehensive areas tend to be higher with their hydrogen sulfide mass concentration rates.On the other hand,in the sewage flowing direction,the hydrogen sulfide mass concentration may be different from well to well with the significant increase in the branch entry and water drop wells.And,in contrast,in the depth of the inspection wells,the hydrogen sulfide mass concentration at the bottom of the inspection well tends to be greater than that in the middle and upper parts.What is more,the hydrogen sulfide mass concentration in the said inspection wells proves significantly influenced by the time elapsed.Furthermore,in the office and catering areas,the hydrogen sulfide mass concentration also tends to be higher during the working days but lower during the rest days.Nevertheless,in the residential areas,the hydrogen sulfide mass concentration at daytime is greater,and the fluctuation amplitude of the hydrogen sulfide in the rest days tends to be greater than that in the working days.Even for the same inspection well,the hydrogen sulfide mass concentration in summer days tends to be greater than that in autumn,for the higher temperature in summer is likely to be conducive to the formation of such hydrogen sulfide gas.Thus,it can be concluded that there exists a significant positive correlation between the hydrogen sulfide and the ammonia mass concentration,that is to say,the ammonia mass concentration tends to increase with the increase of the hydrogen sulfide mass concentration.
作者
杨春丽
刘艳
张悦
陈娅
秦妍
YANG Chun-li;LIU Yan;ZHANG Yue;CHEN Ya;QIN Yan(Occupational Hazards Control Technology Center,Beijing Mu- nicipal Institute of Labour Protection,Beijing 100054,China)
出处
《安全与环境学报》
CAS
CSCD
北大核心
2018年第6期2230-2235,共6页
Journal of Safety and Environment
基金
北京市自然科学基金项目(8152014)
北京市科学技术研究院创新团队计划课题(IG201702C1)
关键词
安全工程
硫化氢
污水
有限空间
中毒
safety engineering
hydrogen sulfide
sewage
confined space
poisoning
