钢铁厂原料堆粉尘无组织排放抑制技术进展

Progress of suppression technology of fugitive emission dust from raw material piles in iron and steel works

钢铁厂原料堆在风蚀作用、卸料以及取料过程中无组织排放的粉尘严重污染周围空气,危害工人身体健康。阐述了目前钢铁厂原料堆粉尘无组织排放抑制技术及存在的问题,通过原料堆的静态扬尘量以及动态扬尘量的估算公式,表明减小环境的来流风速与原料堆起尘临界风速的差值可有效降低粉尘的无组织排放量;介绍了喷水抑尘、喷抑尘剂抑尘、防风抑尘网抑尘、封闭料场抑尘以及新型生物纳膜抑尘、云雾抑尘技术,对比了这些技术的抑尘机理、抑尘效率、影响因素、技术优缺点,得出使抑尘效果最优的结构参数,提出未来应关注的研究方向。

The fugitive emission of dust seriously affects the surrounding air quality and workers’ health in the process of wind erosion, unloading and reclaiming of iron and steel works’ raw material piles. This paper described technologies and problems of dust emission control used in raw material piles of iron and steel works. Through the estimation formula of static dust and dynamic dust shown that the fugitive emission of dust can be effectively reduced by decreasing the difference between the ambient wind speed of environment and the critical wind speed of the raw material piles. Introduced watering dust suppression, spraying dust suppressants, windbreak dust suppression, closed stockyard dust suppression and new biological nano-film dust suppression, cloud dustsuppression technologies. Compared the aspects of dust suppression mechanism, dust suppression efficiency,influencing factors, technical advantages and disadvantages to obtain the optimal structure parameters of dust suppression effect. Proposed the research direction in the future.