压电式超声雾化降尘系统设计及其试验研究

Design and Experimental Study of Piezoelectric Ultrasonic Atomizing Dust Removal System

通过传送带传送物料是散料工业运输的主要方式,对运输过程中产生的粉尘进行治理是散料工业运输亟需解决的问题,目前应用比较多的方法为雾化降尘法。为了提升雾化降尘的效果,设计了一种30 kHz喇叭型压电式超声雾化装置和配套的雾化降尘试验系统,并采用单因素试验研究入口水流量、风速、粉尘种类、颗粒直径、喷嘴安装角度等工艺参数对雾化降尘效率的影响规律。结果表明,当入口水流量为30 L/h时,对煤粉粉尘降尘效率为75.9%;当风速为2.1 m/s时,对煤粉粉尘降尘效率为61.1%;相比较于煤粉和沙子,黄土的降尘效率略高;该喷嘴对粒径为107~180μm范围内的煤粉粉尘降尘效率最高为73.9%;当喷嘴安装角度为0时,对煤粉粉尘降尘效率最高为81%。

Conveying materials through a conveyor belt is the main way of bulk material industrial transportation,and the dust control in the transportation process in the bulk material transportation urgently needs to be solved.Currently,more methods for atomized dust removalare applied.In order to enhance the atomization and dust removal effects,this paper designs a 30 kHz horn piezoelectric ultrasonic atomization device and its supporting atomized dust removal system and then uses the single factor test to study the effects of process parameters such as inlet water flow,wind speed,dust type,particle diameter and nozzle installation angle on atomization and dust removal efficiency.The results show that when the inlet water flow is 30 L/h,the coal dust removal efficiency is 75.9%and thatwhen the wind speed is 2.1 m/s,the removal efficiency is 61.1%.Compared with pulverized coal and sand,loess has higher dust removal efficiency.The pulverized coal dust removal efficiency of the nozzle increases to 73.9%,ranging between 107~180μm.When the nozzle installation angle is 0,the coal dust removal efficiency is the highest,being 81%.