旋流吸附-芬顿氧化耦合技术用于橡胶行业挥发性有机物(VOCs)控制

A large amount of VOCs waste gas is produced in the rubber industry production process, which is complexed and seriously-polluted.Therefore there is an eager need to develop an advanced treatment technology for the VOCs waste gas . In this project, first focused on the selection of carbon-based adsorption-catalytic materials and enhanced the VOCs adsorption performance of carbon-based adsorption materials by constructing Heterogeneous nanometer Fenton (Fe/C-H2O2) in situ adsorption-catalytic system. Secondly, studied the relationship between the flow characteristics of carbon-based particles in three-dimensional rotating turbulent shear field and vortex adsorption, developmented efficient vortex adsorption equipment matching the carbon-based adsorption materials, making the VOCs removal rate above 98% and the emissions of VOCs were superior to the latest standards of the state. Finally, continuous regenerated the carbon-based adsorption-catalytic materials by senior fenton oxidation method to meet the cycle use of VOCs adsorption; Meanwhile, the VOCs which were adsorbed by the carbon-based materials were oxidative degraded to carbon dioxide and water through senior fenton oxidation method and made the whole process did not produce secondary pollution.

在橡胶行业生产过程中产生大量VOCs 废气，其组分复杂、污染严重，因此急需发展先进治理技术。本项目首先从碳基吸附-催化材料的筛选入手，通过构筑非均相纳米Fenton(Fe/C-H2O2)原位吸附-催化体系，增强碳基吸附材料对VOCs 的吸附性能。其次，研究三维旋转湍流剪切场中的碳基颗粒流动特性和旋流吸附关系，发展与碳基吸附材料所匹配的高效旋流吸附设备，使VOCs 一次去除率>98%，VOCs污染物排放优于国家最新标准。最后，通过芬顿高级氧化方法将碳基吸附-催化材料进行连续再生，再生后碳基材料满足VOCs 吸附的循环使用；与此同时芬顿高级氧化方法将碳基材料所吸附的VOCs 氧化降解为二氧化碳和水，使整个VOCs 处理过程中不产生二次污染。

本项目对橡胶行业VOCs废气进行了前期调研工作，为后续工作提供了数据指导。利用高速摄像技术对旋流吸附过程中的吸附颗粒进行了运动状态检测，掌握三维旋转湍流剪切场中碳基吸附颗粒流动特性和旋流吸附动态关系。完成了旋流流化床模拟工作，深入探究了旋流流化床中连续相流体特性以及分散相吸附颗粒运动特性。进行了碳基吸附颗粒旋流吸附VOCs实验，通过吸附实验研究了不同改性碳基吸附-催化颗粒在旋转流场中吸附 VOCs 的能力，使橡胶废气中 VOCs 一次去除率达到98%以上。成功构建了以氧基氯化铁（FeOCl）为代表的一系列铁基固体Fenton催化剂，通过芬顿氧化方法再生了吸附VOCs饱和后的改性碳基吸附-催化颗粒，将碳基颗粒所吸附的 VOCs 降解为二氧化碳和水。