摘要
为了研究抗生素原料药筛粉车间药物粉尘分布规律,改善作业环境,我们采用COMSOL Multiphysics 6.0软件进行模拟,研究筛粉车间的气流分布和粉尘运移规律。结果表明筛粉车间粉尘随风流扩散速度较快,在第100 s时达到稳定状态;粉尘运移至稳定状态后,粉尘浓度超标区域(粉尘浓度>6 mg/m^(3))分布广,主要分布于旋振筛至进风口对侧墙壁中下部区域;粉尘分布呈现局部聚集的特点,粉尘运移与风流运动相关,易聚集在风流速度小且涡流区域;在人体呼吸带高度(h=1.5 m)平面上,产尘面附近区域粉尘浓度高,局部浓度超过32 mg/m^(3),是粉尘防治的重点区域,可通过改变车间风流分布或其他降尘手段改善作业环境。
To study the distribution pattern of drug dust in the antibiotic raw material drug powder screening workshop and improve the working environment,we used COMSOL Multiphysics 6.0 software to simulate and study the airflow distribution and dust transport law in the powder screening workshop.The results indicated that the dust in the powder screening workshop diffused rapidly with the airflow and reached a stable state at the 100th second.After the dust migrated to a stable state,the area with excessive dust concentration(dust concentration>6 mg/m^(3))widely distributed,mainly distributed in the middle and lower parts of the wall opposite the air inlet from the rotary vibrating screen.The distribution of dust showed a characteristic of local aggregation,and dust transport was related to airflow movement,which was prone to aggregation in areas with low airflow velocity and eddy currents.On the plane of the human respiratory belt height(h=1.5 m),the concentration near the dust producing surface was high,with local concentrations exceeding 32 mg/m^(3).It was the key area for dust prevention and control.And the working environment can be improved by changing the air flow distribution in the workshop or other dust reduction methods.
作者
贾田田
王飞
Jia Tiantian;Wang Fei(School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《中华劳动卫生职业病杂志》
CAS
CSCD
北大核心
2023年第12期942-947,共6页
Chinese Journal of Industrial Hygiene and Occupational Diseases
基金
山西省基础研究计划资助项目(202203021211160)
山西省研究生教育教学改革课题(2022YJJG039)。
关键词
粉尘
筛粉车间
风流分布
粉尘分布
数值模拟
Dust
Powder screening workshop
Air flow distribution
Dust distribution
Numerical simulation
