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对某大型化肥企业进行了职业卫生现场调查、职业病危害因素检测,结果发现工人接触尿素粉尘的时间加权平均浓度(CTWA)为2.32~5.54 mg/m3,在散控系统大多巡检点及包控系统的料仓巡检点粉尘短时间接触浓度(CSTEL)为16.1~28.43 mg/m3,超过最大超限倍数标准;散控系统巡检工人接触氨CTWA为18.99 mg/m3,部分巡检点氨CSTEL达到79.16~229.12 mg/m3;成品包装工人接触的等效噪声LEXW超标,为88.7 dB(A)。可见,该系统存在尿素粉尘、氨、噪声等主要职业病危害因素,超标岗位职业病危害可能造成工人职业健康损害,应从工程防护、个人防护、职业卫生管理等方面设置职业病危害关键控制点,采取职业病危害综合防控措施降低职业病危害风险。
A large-scale fertilizer enterprise conducted a occupational health field survey and the detection of occupational hazard factors. The results showed that the time-weighted average concentration (CTWA) of workers exposed to urea dust was 2.32-5.54 mg / m3. Most inspection points and control measures The system’s silo inspection point dust short-term exposure concentration (CSTEL) of 16.1 ~ 28.43 mg / m3, exceeding the maximum limit of multiple times the standard; scattered inspection system inspection workers exposure to ammonia CTWA 18.99 mg / m3, part of the inspection ammonia The CSTEL reached 79.16 ~ 229.12 mg / m3. The equivalent noise LEXW of finished package workers exceeded 88.7 dB (A). It can be seen that there are major occupational hazards such as urea dust, ammonia and noise in this system. Occupational hazards of excessive occupational hazards may cause occupational health damage to workers. Occupational hazards should be set from the aspects of engineering protection, personal protection and occupational health management. Comprehensive prevention and control measures to reduce the risk of occupational hazards.