某燃煤发电机组扩建项目职业病危害预评价

目的识别、分析和评价某燃煤发电机组可能产生的职业病危害因素及危害程度,为项目设计提供必要的职业病危害防护对策和建议。方法采用类比法、检查表法等对本项目可能产生的职业病危害因素的种类和强度进行定性、定量分析。结果该项目的选址、总体布局、职业病危害防护措施、卫生辅助用室、个体防护用品、职业卫生管理和应急救援措施等内容基本符合卫生学要求。类比项目存在的主要职业病危害因素为煤尘、粉煤灰粉尘、氨、肼、盐酸、二氧化硫、噪声、高温、工频电场,5个工种接触的总粉尘浓度和2个工种接触的噪声强度超标,粉尘的STEL和TWA分别为0.3～38.7 mg/m3、0.3～12.2 mg/m3,噪声的等效声级分别是88.6 dB(A)和91.1 dB(A),其他职业病危害因素均符合国家职业接触限值。结论该项目为职业病危害严重项目,只要认真落实拟采取职业病危害防护措施和补充措施可以满足职业卫生要求。

Pre-evaluation of occupational hazards in the expand construction project of coal power plant

Objective To identify,analyze the occupational hazards possibly existed in the expand construction project of the coal power plant,and evaluate hazard level,provide necessary suggestion and strategy of preventing occupational diseases.Methods Analogy and checklist methods was applied in the occupational risk factors with qualitative and quantitative analysis.Results The site selection,general layout,protective measures on occupational disease,personal protective equipment,the management of occupation hygiene and emergency rescue measures achieved the hygiene requirements.The main occupational hazards in the analogy project were coal dust,fly ash dust,ammonia,hydrazine,hydrochloric acid,carbon disulfide,noise,heat stress and power frequency electric field,the total dust concentrations of five types of work exposure and noise intensities of two types of work exposure(88.6 dB(A) and 91.1 dB(A))exceeded occupational exposure limits,CSTEL and CTWA for dust were 0.3-38.7 mg/m3 and 0.3-12.2 mg/m3.Other occupational hazards of all types of work were in accord with occupational exposure limits.Conclusion The project is a serious harm of occupational disease,occupational protective measures and additional measures adopted will satisfy occupational requirements.