Investigations of the effects of two typical jet crushing methods on the atomization and dust reduction performance of nozzles
Han Han1
Hetang Wang1
Qi Zhang1
Yunhe Du2
Haojie Wang2
Hui Wang1
1.State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China2.School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China
摘要：Single-fluid nozzles and dual-fluid nozzles are the two typical jet crushing methods used in spray dust reduction.To distin-guish the atomization mechanism of single-fluid and dual-fluid nozzles and improve dust control efficiency at the coal min-ing faces,the atomization characteristics and dust reduction performance of the two nozzles were quantitatively compared.Results of experiments show that,as water supply pressure increased,the atomization angle of the swirl pressure nozzle reaches a maximum of 62° at 6 MPa and then decreases,but its droplet size shows an opposite trend with a minimum of 41.7 μm.The water supply pressure helps to improve the droplet size and the atomization angle of the internal mixing air-liquid nozzle,while the air supply pressure has a suppressive effect for them.When the water supply pressure is 0.2 MPa and the air supply pressure reaches 0.4 MPa,the nozzle obtains the smallest droplet size which is 10％smaller than the swirl pressure nozzle.Combined with the dust reduction experimental results,when the water consumption at the working surface is not limited,using the swirl pressure nozzle will achieve a better dust reduction effect.However,the internal mix-ing air-liquid nozzle can achieve better and more economical dust reduction performance in working environments where water consumption is limited.
机标关键词：atomizationdustcrushingeffectsinvestigationsmethodsnozzlesperformance
论文发表日期：2023-08-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：15( 92-106 )
英文信息