可过滤颗粒物（FPM）即人们熟知的烟尘已实现超低排放，而在烟道内呈气态、排放后经冷却转变为颗粒的可凝结颗粒物（CPM）成为下一步治理的重点。直接捕集微量气态CPM很困难，为此，本项目提出通过冷却方式将气态CPM的凝结成核过程提前到排放前，然后借助常规颗粒物处理方法对其进行治理的设想。但CPM凝结后属于超细颗粒物，其治理问题也未得到彻底解决，这又归结到颗粒物治理领域的共性关键难题：颗粒团聚。因此，同步实现凝结和团聚是解决CPM治理的关键。前期研究发现：超细颗粒物可在冷介质表面发生汇流团聚和沉积，而冷介质同时也是CPM凝结的诱因。因此，本项目提出利用冷介质诱导方法解决CPM同步凝结和团聚的问题。项目拟通过实验研究建立该方法的基础理论体系；探索CPM与FPM协同团聚规律；研究烟气中水蒸气的影响；完善该机制应用于CPM高效脱除的方法体系。项目符合国家治理雾霾重大需求，具有重要的科研价值和现实意义。

Filterable particulate matter (FPM), which is usually known as soot, has been achieved ultra-low emission. Therefore, condensable particulate matter (CPM), which is in gas state in the stack and immediately condenses into granules after discharge, becomes the key object in the next stage. It is very difficult to capture insignificant amounts of the gaseous CPM directly. Thus, this project proposes the idea of making gaseous CPM to be condensed before discharge via cooling. However, CPM belongs to ultra-fine particle after condensation, and the control of ultra-fine particles has not been completely solved, which makes us come to the common key problem in the field of particle control: particle aggregation. Therefore, the synergistical implementation of condensation and agglomeration is the key to solve CPM control problem. Our previous studies have found that ultrafine particles (refering to FPM) can be agglomerated and deposited on cold surface. Meanwhile, the cold media is also the cause of CPM condensation. Therefore, this project proposes to solve the problem of CPM condensation and agglomeration by using the cold medium induction. This project intends to establish the basic knowledge system of above-mentioned method through experimental research, including exploring the law of synergistical aggregation of CPM and FPM and the influence of steam in flue gas. This method will be applied to the efficient removal of CPM. The project is in line with the major national requirement of haze control, and has important scientific value and practical significance.