Study On Dust Removal Performance Of Pulse-Injeted Polyethylene Filter Dust Collector

At present,pneumatic conveying is widely used in various industries such as medicine,chemical manufacturing,and mineral processing.Dust collectors are a vital part of a pneumatic conveying system.During the conveying process,it was found that the dust adhered to the surface of the traditional filter material and the folds resulted in waste of powder and caused serious economic losses.On the other hand,traditional filter materials have a short service life,resulting in waste of resources and environmental pollution.Therefore,this paper takes the polyethylene pipe dust collector as the research object,through numerical simulation and industrial experiments,to explore the internal airflow distribution of the polyethylene pipe dust collector and the effect of different industrial parameters on the cleaning effect of the polyethylene pipe dust collector during the pulse injection process.influences.In order to know the airflow distribution inside the polyethylene tube dust collector during the pulse injection process,the numerical simulation method is used to simulate the airflow.The results show that:in the process of pulse injection,the high-speed airflow gathers at the entrance of the flower plate.With the increase of the injection pressure,the airflow velocity at the entrance of the flower plate increases,and the pulse cleaning effect is better;the pressure on the side wall of the filter material.The simulation results lay a theoretical foundation for the following industrial experimental research.Then we select different particle sizes of fly ash powder,establish（Filtration velocity,pulse interval,dust concentration and pulse pressure）industrial parameters and dust collector cleaning effect（operating pressure drop,dust concentration emission,The relationship between the residual amount of dust and the recovery efficiency）,and finally determine the parameters that can ensure the stable operation of the polyethylene pipe dust collector.end up with:（1）When collecting powder,when the filtration velocity is 0.8～1.2m/min,the resistance of the polyethylene pipe dust collector is stable after running for 25 minutes,the dust emission concentration is much lower than 1mg/m~3,and the recovery efficiency is all When it reaches more than 97%,the dust removal effect is the best when the injection pressure is increased;when the filtration velocity is increased（2.2～4.0m/min）,the resistance of the equipment is stable,and the powder recovery efficiency reaches more than 94.5%and can achieve ultra-low emissions.The relationship between the filtration velocity and the running resistance increment is:y=575.9x~2-3492.37x+5436.08.Its filtration velocity range does not exceed 3.8m/min.At the same time,it can be considered to increase the pulse interval to reduce resource consumption,and to increase the gas-solid concentration to improve work efficiency.（2）In the process of collecting powders with a particle size d50 of 5μm,when the filtration velocity is 2.8～3.6m/min,the powder recovery efficiency can reach more than92.8%and all achieve ultra-low emissions.The relationship between the filtration velocity and the operating resistance increment of the dust collector is:y=303.57x~2-1647.85x+2472.3.The filtration velocity is proportional to the square of the resistance of the equipment.The filtration velocity range should not exceed 3.6m/min.The above research results show that the polyethylene pipe dust collector has the characteristics of high efficiency recovery and ultra-low emission,and provides certain theoretical reference and technical support for the application of polyethylene pipe dust collector in industrial production.