Research On The Impactive And Adhesive Technology Of Particulates

Since 2011,many of big and medium-sized cities have constantly emerged haze weather. The monitoring datas from National Climate Center, the pollutant emission has approached critical value, and the haze days account for 30% or above all the whole year. The fundamental cause is due to the fine particles in the atmosphere, which mainly come from power plants. The current electrostatic precipitator is inefficient for removing fine particles; and the allowing flue gas flow velocity is rather low for traditional electrostatic precipitator, leading to the large floor area and high investment. Thus, how to capture dust particles in high gas flow rate becomes a more and more important subject.Aiming at the fine particles of power plant, this article puts forward the concept of capturing fine particles in high speed airflow by an impactive and adhesive force. Currently, the related research on impact and adhesion primarily concentrates on the cascade impactor, researchers rarely study it as the dust removal equipment. Based on the impactive and adhesive theory of particles, this article firstly studies the adhesive mechanism of particles in the static state, conducting force analysis for particles’ impaction and deducing the influence factors for adhesion; then build the two-dimensional gas-solid flow fields for semi-tubular and tabulate devices, and analyzes the simulated results s; finally optimized the structure design of the two devices by the simulation and explore the removal effect of fine particles by the impactive and adhesive technology. It’s discovered that the semi-tubular devices is more efficient in removing fine particle.