论文部分内容阅读
为研究热电厂接尘工人接尘剂量与尘肺发病的关系，根据某热电厂接尘工人接尘时间、肺总通气量及车间的粉尘浓度和游离ＳｉＯ２含量，计算职工肺内石英负荷量，然后采用累积剂量患病率寿命表法研究尘肺患病率与粉尘剂量反应关系，推算该类粉尘的容许浓度。结果：接尘剂量与尘肺患病率呈显著正相关关系（ｒ＝０．９２３，Ｐ＜０．００５），并推算出其直线回归方程为Ｙ＝－４５．４０４４＋１１．０１０１２Ｘ。提示：如果要求每人平均工作３０ａ，且尘肺患病率低于０５％，则接触煤粉（ｃｏａｌｄｕｓｔ）者和接触灰粉（ｆｌｙａｓｈ）者作业场所平均粉尘浓度分别应控制在１０００ｍｇ／ｍ３和３２５ｍｇ／ｍ３以下。
In order to study the relationship between the dose of dust pick-up workers and the incidence of pneumoconiosis in thermal power plants, the worker’s lung volume of quartz was calculated according to the dust pick-up time, the total lung ventilation, the dust concentration in the workshop and the free SiO2 content, Study on the relationship between the prevalence of pneumoconiosis and the dose response of dust by using the dose-rate life-table method to calculate the allowable concentration of this kind of dust. Results: There was a significant positive correlation between dust dose and the prevalence of pneumoconiosis (r = 0.923, P <0.005). The linear regression equation was calculated as Y = -45.4044 + 11.01012X. Tip: If the average work per person is required for 30 years, and the prevalence of pneumoconiosis is less than 05%, the average dust concentration at the workplace exposed to coaldust and flyash should be controlled at 1000mg / M3 and 3 25mg / m3 below.