某化工厂工作场所空气中丙酮浓度现状分析

Acetone concentration in the workplace air of a chemical factory

目的探讨某化工厂准备工序和纺丝工段作业场所空气中丙酮在各作业点的分布及作业人员个体接触水平,提出预防措施及作业人员现场操作时应注意事项。方法依据《工作场所空气中有害物质监测的采样规范》(GBZ 159-2004)、《工作场所空气有毒物质测定脂肪族酮类化合物》(GBZ/T 160.55-2007)国家标准,对该厂相关工作场所空气中的丙酮进行采样监测。结果该化工厂准备工序、纺丝工段主要工作岗位丙酮的短时间接触浓度合格率分别为25%、13%,准备工序、Ⅰ期纺丝工段三楼、Ⅱ期纺丝工段三楼丙酮的时间加权平均浓度分别为3153.9、882.1和599.5 mg/m3,超过国家标准。结论丙酮是该化工厂的主要职业病危害因素,在其主要工作场所中丙酮的浓度超标较为严重,需加强工程防护及职业健康监护以减少职业病的产生。

Objective To discuss the exposure level for individual worker and the distribution of acetone in the air of prep- aration and spinning section, propose preventive measures and points for attention on field operation. Methods According to Specifications of Air Sampling for Hazardous Substances Monitoring in the Workplace （ GBZ 159 - 2004） and Methods for Toxic Substance in the Air of Workplace Aliphatic Koncs （ GBZ/T 160. 55 - 2007 ）, acetone in the air were moni- tored. Results The qualified rates of short time exposure acetone concentration in main posts of preparation and spinning section were 25% and 13%. The CTW^ for workers in preparation section, the third floor of spinning section （Phase I ）, the third floor of spinning section （ Phase II ）were 3 153.9,882. 1 and 599. 5 mg/m3 respectively, exceeding national expo- sure occupational limits. Conclusion Acetone is the main source of industrial diseases in this chemical factory. The ace- tone concentrations in the most workplace are higher than national standards. The key positions existed occupational diseases should be reinforced, and the prevention measures and occupational health surveillance should be strengthened.