干冰喷射去除带有油漆涂层金属表面污染实验  

A dry ice jet system for decontamination of painted metal

作　　者：李烨[1] 张东[1] 王萍[1] 李涛文[1] 孙宇[1] 赵丹[1] 谭昭怡[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核技术》2012年第7期557-560,共4页Nuclear Techniques

摘　　要：采用干冰喷射去污技术去除金属表面油漆涂层,实验显示,随着喷嘴行走速度的增加,油漆涂层的去除重量及去除宽度均呈下降趋势;最佳靶距为25 mm,最佳入射角度为63°,压缩空气压力为0.6–0.7 MPa时,对金属表面油漆涂层的去除效果较好;空气净化装置净化效果>99%;去除油漆涂层时生成的气溶胶集中在5.8–9.0μm。结果表明,干冰喷射去污技术可将137Cs表面污染水平降至仪器探测限以下;对于235U污染样品,可达到清洁解控水平。In this work, decontamination of painting on metal surface by dry ice jet was carried out. The influence of jet parameters on decontamination efficiency was examined. The results showed that the painting weight loss decreased with increasing speed of jet movement. The optimized parameters were target distance of 25 mm, jet angle of 63°, and the pressure of 0.6 -0.7 MPa, with a filtration efficiency of over 99% and 5.8-9.0 μm particle sizes of the aerosol. For the painted samples polluted by 137Cs and 235U, the decontamination effect is excellent. For the polluted plumbum kettles, this method is effective. Therefore, the dry ice jet is an excellent technology for painting on metal surface.

关 键 词：干冰 去污 涂层 气溶胶 

分 类 号：X591[环境科学与工程—环境工程]