精轧工艺颗粒物污染特征及其岗位环境浓度监测  

Pollution characteristics of the generated particles during finishing rolling process and concentration monitoring in the occupied zone

作　　者：郭胜男 黄艳秋[1,2] 王怡 卢柯[1] 郭军伟 范锦龙 文福 GUO Shengnan;HUANG Yanqiu;WANG Yi;LU Ke;GUO Junwei;FAN Jinlong;WEN Fu(School of Building Services Science and Engineering,Xian University of Architecture and Technology,Xian 710055,China;Statc Key Laboratory of Green Building in Western China,Xi'an 710055,China;WISDRI Engineering&Research Incorporation Limited,Wuhan 430223,China)

机构地区：[1]西安建筑科技大学建筑设备科学与工程学院,西安710055 [2]西部绿色建筑国家重点实验室,西安710055 [3]中冶南方工程技术有限公司,武汉430223

出　　处：《环境工程学报》2021年第1期307-315,共9页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划项目(2018YFC0705300);国家自然科学基金青年基金项目(51608424);陕西省高校科协青年人才托举计划项目(20190418)。

摘　　要：为探究我国钢铁行业热轧厂精轧工艺的污染特征,利用扫描电镜(SEM)和激光粒度分布测定实验以及现场实测,于2019年夏季对广东省某典型热轧厂精轧工艺颗粒物进行微观形貌、粒径分布及其岗位环境污染规律研究。结果表明,精轧工艺所产颗粒物外观呈不规则块状形态,粒径集中在2.423~3.519μm,其RosinRammler粒径分布函数的均匀度指数为1.769,特征尺寸为2.932μm。该结果为精轧工艺进行净化除尘数值模拟分析奠定了基础;其岗位环境颗粒物浓度随时间呈周期性波动变化,精轧区测点浓度沿轧制方向逐架递增,PM_(2.5)/PM_(10)均值比例依次为0.807、0.749、0.912,侧面反映了精轧源的污染特性。在精轧区排风罩设计中,建议沿轧制方向,每架精轧机排风罩的设计风量依次增大,达到精准控制局部环境的效果。In order to explore the pollution characteristics of finishing rolling process in hot rolling mill of the iron and steel industry in China,SEM,laser particle size distribution test and field measurement were used to study the micro morphology,particle size distribution and pollution property of the occupied zone during the finishing rolling process in hot rolling mill of Guangdong province in Summer of 2019,respectively.The results showed that the particles produced by the finishing rolling process had irregular morphology and conglomeration.The particle size was mainly within the range of 2.423~3.519μm,the uniformity index of the Rosin-Rammler distribution was 1.769,and the characteristic size was 2.932μm.The results laied a foundation for the numerical simulation and analysis of the cleaning and dust removal of the finishing rolling process.The environmental particle concentration in the occupied zone fluctuated periodically over time.The aforementioned concentration of the environmental measuring points in the finishing rolling zone showed an increasing trend along the rolling direction,and the average concentration ratio of PM_(2.5)/PM_(10)were 0.807,0.749 and 0.912 in turn,which indirectly reflected the pollution characteristics of finishing rolling source.Thus,it is suggested that along the rolling direction,the designing ventilation flow rate should be enlarged for each exhaust hood in sequence,so as to achieve the precise control of local environment quality.

关 键 词：精轧工艺 颗粒物 污染源 岗位环境 净化除尘 

分 类 号：X83[环境科学与工程—环境工程]