It is an important way to reduce ultrafine particulate emissions by using the turbulence coagulation technology to make small particulate coagulate to larger particulate which can be removed by dust removal device.The gas-solid two-phase flow field and ultrafine particulate coagulation with different slotting structures was simulated

based on the Euler-Lagrange method and O'Rouekr collision model.A basis for structural optimization of coagulation element was provided.The results show that slotting on the coagulation module can increase the collision chance of particles along the height direction and enhance the particles coagulation.After optimizing the slotting way and location of the coagulation element

the proportion of the ultrafine particles with size of 2.5μm at the passage outlet reduced

while that with size of 5μm and the maximum increased

indicating the coagulation effect was enhanced.