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目的分析地铁集中空调通风系统清洗后消毒效果,为地铁集中空调清洗后消毒工作提供技术指导。方法选取某市新建地铁线路一条,抽取其中5座结构相似地铁站,清洗后使用不同种类、剂量消毒剂进行消毒,消毒完后12 h后对其集中空调通风系统进行检测,观察消毒效果。结果新风井采用含氯消毒剂消毒效果最为明显,集中空调管道内消毒采用长效季铵盐类消毒剂优于75%酒精,地铁隧道风压对集中空调清洗消毒后的效果维持存在显著影响(P<0.05)。结论地铁集中空调通风系统通过全面清洗消毒能够明显地提高一次性监测合格率,但消毒后效果维持易受地铁隧道风压影响。
Objective To analyze the disinfection effect after the cleaning of metro central air conditioning and ventilation system and to provide technical guidance for the disinfection of metro air conditioning after cleaning. Methods One new metro line in a city was selected and five subway stations of similar structure were selected. After disinfection, disinfectant was disinfected with different kinds of disinfectants and disinfected. After 12 hours of disinfection, the central air conditioning and ventilation system was tested and the disinfection effect was observed. Results The disinfection effect of fresh air well with chlorine disinfectant was the most obvious. Long-acting quaternary ammonium disinfectant was better than 75% alcohol disinfected in central air conditioning pipeline. The effect of subway tunnel wind pressure on central air conditioning cleaning and disinfection maintained significant effects ( P <0.05). Conclusion Subway central air-conditioning and ventilation systems can significantly improve the one-time monitoring pass rate through thorough cleaning and disinfection, but the effect after disinfection remains vulnerable to the wind pressure of subway tunnels.