论文部分内容阅读
目的调查某液晶电视显示模组技改项目通风系统,针对系统存在不合理的地方进行优化,并评价系统优化后效果。方法根据国家相关标准要求,笔者于2014年和2015年分别对该企业通风系统优化前后进行职业卫生现场调查、职业卫生检测。结果优化前,由于局部排风系统存在罩口设计不合理、风机风量不足、密闭性差等原因,导致该企业POL(偏光片)车间红色喷码机、蓝色喷码机清洗工个体CTWA丁酮为2 488.49~2 799.70 mg/m~3,远超过国家职业接触限值(PC-TWA 300 mg/m~3)。2015年企业进行局部通风系统优化后,POL车间红色喷码机、蓝色喷码机清洗工个体CTWA丁酮为3.91~9.97 mg/m~3,低于国家职业接触限值。结论全面通风系统和局部通风经过优化后,作业场所中有毒有害气体得到有效控制。
Objective To investigate the ventilation system of a technical project of a LCD TV display module, to optimize the system where unreasonable exists and to evaluate the effect of system optimization. Methods According to the requirements of relevant national standards, the author carried out on-site occupational health surveys and occupational health tests before and after optimization of the ventilation system of the enterprise in 2014 and 2015 respectively. Results Before the optimization, due to the existence of local exhaust ventilation system hood design is not reasonable, inadequate air flow fan, airtight and other reasons, leading to the enterprise POL (polarizer) shop red inkjet printer, blue inkjet printer cleaning individual CTWA butanone 2 488.49 ~ 2799.70 mg / m ~ 3, far exceeding the national occupational exposure limits (PC-TWA 300 mg / m ~ 3). After the optimization of local ventilation system in 2015, the volume of CTHO methyl ethyl ketone in POL workshop red inkjet printer and blue inkjet printer was 3.91-9.97 mg / m 3, which is lower than the national occupational exposure limit. Conclusion After the full ventilation system and local ventilation are optimized, toxic and harmful gases in the workplace are effectively controlled.