摘要
文章调研了国内20家炼化企业78套污水集输系统挥发性有机物(VOCs)治理设施,发现35%的治理设施采用了生物法治理技术。根据调研结果,发现部分采用生物法的治理设施在实际运行时并没有达到预期的治理效果,设施出口NMHC和苯系物浓度甚至超出了排放限值,无法满足日益严格的环保要求。针对某炼化企业2套污水废气治理设施开展了人工现场监测,对生物法的治理效果进行评估。结果表明,NMHC的去除率分别为40.39%和8.29%,低于GB 31570—2015《石油炼制工业污染物排放标准》去除率要求,苯系物的出口浓度最高达到14.00 mg/m^(3),这意味着单一的生物法可能无法有效地处理污水废气。由于生物法受环境温度、湿度、填料堵塞、气流分布等诸多条件的影响,VOCs去除率难以达标,文章分析了生物法不能有效治理污水VOCs的原因,对采用生物法的治理设施提出了调节微生物的生存环境、治理工艺进行改造等改进建议,有助于炼化企业对VOCs排放进行防治与管控。
A survey was conducted on 78 wastewater collection and transportation systems from 20 refining and petrochemical enterprises in China to investigate VOCs treatment facilities.Results show that 35%of these facilities adopted biological treatment technologies.However,the survey revealed that some facilities using biological methods did not achieve the expected treatment performance during operation,with outlet concentrations of NMHCs and aromatic hydrocarbons even exceeding emission limits,failing to meet increasingly stringent environmental requirements.Field monitoring was carried out on two wastewater exhaust gas treatment facilities at a refining enterprise to evaluate the effectiveness of biological treatment.The results indicated NMHC removal rates of 40.39% and 8.29%,both below the removal efficiency required by GB 31570—2015“Emission Standard of Pollutants for Petroleum Refining Industry”,while the maximum outlet concentration of aromatic hydrocarbons reached 14.00 mg/m^(3).This suggests that biological treatment alone may not effectively handle wastewater exhaust gases.Since biological methods are influenced by multiple factors such as environmental temperature,humidity,filler clogging,and airflow distribution,VOCs removal rates often fail to meet standards.The paper analyzes the reasons for the limited effectiveness of biological treatment and proposes improvement measures,including adjusting microbial living conditions and modifying treatment processes,to enhance VOCs emission control and management in refining enterprises.
作者
王晨
郭帅
栾辉
许德刚
刘寅飞
张为民
Wang Chen;Guo Shuai;Luan Hui;Xu Degang;Liu Yinfei;Zhang Weimin(State Key Laboratory of Petroleum Pollution Control;CNPC Research Institute of Safety&Environment Technology;PetroChina Refining,Chemicals&New Materials;Daqing Oilfield Water Environmental Protection Company)
出处
《油气田环境保护》
2025年第5期42-47,共6页
Environmental Protection of Oil & Gas Fields
基金
中国石油天然气股份有限公司炼化新材料分公司2024年度科技项目(AYLH2024-201)。
关键词
炼化企业
挥发性有机物(VOCs)
污水集输系统废气
生物法
refinery enterprise
volatile organic compound
waste gas from sewage gathering and transportation system
biological method
