化学活性剂与多级射流耦合作用下可吸入颗粒团聚清除机理

项目名称： 化学活性剂与多级射流耦合作用下可吸入颗粒团聚清除机理

项目编号： No.21206080

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 化学工程及工业化学

项目作者： 孙德帅

作者单位： 青岛大学

项目金额： 25万元

中文摘要： 大气可吸入颗粒物已经成为城市大气的首要污染物，但传统除尘器无法去除过程工业产生的超细可吸入颗粒。本项目以超细可吸入颗粒物为研究对象，提出利用多级射流管将化学活性剂溶液喷入到超细可吸入颗粒团聚装置中，利用化学活性剂改变可吸入颗粒的表面性能，增强颗粒间的粘附；合理的设计射流装置，射流管沿团聚装置构成多级射流区域，使可吸入颗粒在不同射流区域内连续团聚的创新研究思想。采用理论分析、试验研究与数值模拟相结合的方法，对团聚室内可吸入颗粒间碰撞粘附进行研究，探索颗粒之间、颗粒与活性剂之间、颗粒与团聚体之间的相互作用及其微观流动结构，揭示超细可吸入颗粒在化学活性剂与多级射流耦合作用下的团聚机理，建立超细可吸入颗粒团聚与团聚体解聚的动态速率方程。开发具有独立知识产权的超细可吸入颗粒团聚清除技术，该技术对我国治理大气环境污染具有重要应用价值。

中文关键词： 细颗粒；团聚；化学活性剂；射流；耦合

英文摘要： Inhalable particles in the urban air were the first contamination. The traditional precipitator methods failed to remove the ultrafine particles in industry processes. Our objection in this program aimed to improve the removal efficiency of inhalable particles.Chemical active agent was emitted into the agglomeration chamber by the multistage jet. Chemical active agent could change the surface properties of inhalable particle, and multistage jet could strenghen the collision of paticles. The combination of the two method could improve obviously the agglomeration of inhalable particles. Theory analysis, experimental study and numerical modelling were used to investigate the collision process. At the same time, the interaction and the micro fluidal texture between the particles or between the particle and chemical active agent or between the particle and agglomeration were researched to reveal the mechanism the agglomeration. The agglomeration and dis-sgglomeration equations were designed according to the above study. The successful completion of the program will help promote the removal technology of inhalalble particles, which contribute immensely to the progress of the urban atmospheric pollution.

英文关键词： Fine particle；agglomeration；chemical reactive agent；jet；combination