Research On Improving The Dust Separation Efficiency Of Cyclone Dust Collector

Cyclone dust extractor as a kind of commonly used dust removal equipment, toimprove the separation efficiency of the cyclone has been a hot research at home andabroad. For8~10μm or more particles, the modern cyclone can remove full of thembasically. For more than5um particles, the cyclone also has better removal efficiency,and it can be widely used in the industry. But for the fine dust under5μm,because thecyclone has low separation efficiency and it has not been widely used in the industry.This paper focuses on the problem of low removal efficiency of fine dust and theoptimization of cyclone dust collector overall size, the mainly work as following.(1)Combined the cyclone dust removal spray dust removal by installing the nozzlein the top of cyclone. The high-speed cyclone has improved the probability of dropletcollision and the fine dust being captured, the droplet increased centrifugal force of dustparticles, and it makes dust particles are more likely to be thrown to the wall. To dosimulation and Calculated the can spray space of dust collector by using CFX, we havefound that the spray space only related to the diameter of the cylinder, and it has nothingrelationship with entrance gas velocity and diameter of dust particle. And we havedetermine the range of nozzle installation, calculated the relationship between thepressure and the capture efficiency during spray process by using mathematical method.At the same time, considered the evaporation of spray droplets that caused by heatconduction of rotation of the air, we has calculated the relationship between thediameter of spray droplets and the temperature of dust containing gas.(2) The exhaust pipe of the diameter and depth of insertion all will cause obviousinfluence on the removal efficiency in view of the small diameter tube cyclone dustcollector. The paper simulated the diameter of the exhaust pipe and the insertion depthof the cylinder through the use of ANSYS CFX fluid simulation software of multiphaseflow module and to analyze the influencing factors of cyclone dust catcher. The resultsshow that the cyclone owns per dust removal efficiency when the diameter of thecylinder is30mm and the exhaust pipe insert depth is60mm.(3) Taken the insertion depth of exhaust shaft and tube diameter to combinedsimulation and optimization by using the ANSYS CFX software and complex method. It has solved the local optimal solution above two parameter in the way of improvingthe separation efficiency.It also provides reference for multi parameter simulation.