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To mitigate dust dispersion during electric shovel excavation and loading operations, an externally mounted high-pressure air curtain closed-loop jet dust removal system was designed. This system isolated dust generated during dumping operations at the shovel front from the surrounding environment, creating a low-disturbance zone. When only the airflow system was activated, dust was drawn into the negative-pressure dust collection port through a predetermined closed-loop path via the combined action of jet outlets and the collection port. Subsequent activation of the spray system intensified droplet fragmentation under high-velocity jet impact, enabling thorough mixing of mist particles with dust-laden airflow before settlement. Numerical simulations were conducted to analyze the shovel's external flow field characteristics and droplet distribution during system operation. Four jet deflection angles were evaluated to determine optimal flow field distribution. Simulation results show that the optimal closed-loop entrainment is achieved when the jet velocity is 30 m/s and the deflection angle is 30°. Spray activation enhances droplet fragmentation through high-speed airflow impact, significantly improving dust wetting coverage in front of the shovel body. Airflow field simulations were confirmed through smoke visualization tests showing high similarity to observed flow patterns. Dust concentration measurements after spray activation demonstrated the best dust control effect around the shovel when the jet deflection is 30°, verifying the simulation accuracy of the external flow field and establishing optimal operational parameters.

, authors=Jingxu CHEN^{1, 2, 3}, Jiacheng ZHAO¹, Chengfu CAO¹, Yejiao LIU^{1, 2, 3}, Deji JING⁴, Yongkai ZHI¹, authorsList=Jingxu CHEN, Jiacheng ZHAO, Chengfu CAO, Yejiao LIU, Deji JING, Yongkai ZHI, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1281627186830480310, articleId=1281627184414561204, tenantId=1146029695717560320, journalId=1146031787341344770, language=CN, title=电铲外高压风幕闭环射流除尘装置数值模拟及试验研究, columnId=1277328337940902469, journalTitle=中国安全科学学报, columnName=安全技术与工程, runingTitle=null, highlight=null, articleAbstract=

为降低电铲采装作业过程中的粉尘扩散，设计一种安装于电铲车身外的高压风幕闭环射流除尘装置，将电铲倾倒时车前方产生的粉尘团与周围环境分隔开，形成一个小型非扰动区，只开启风流装置时，通过射流风口与负压集尘口共同作用将粉尘通过指定闭环路径吸入负压集尘口；开启喷雾装置后，液滴粒子在高速射流冲击下加剧破碎，水雾粒子与含尘气流充分混合后沉降；通过数值模拟方法分析开启该装置时电铲车身外流场特性及液滴粒子分布特征，并设置4个不同的偏转角度探究最佳流场分布。模拟结果表明：射流风速30 m/s，偏转角30°的情况下闭环卷吸效果最佳；开启喷雾装置后，液滴粒子在受到高速风流冲击下加剧液滴破碎，增大了车身前方粉尘润湿覆盖面积；烟流观测试验与风流场模拟保持高度相似，验证了开启装置外流场模拟结果的准确性；雾化降尘试验表明开启雾化装置后射流偏转角30°时电铲周围粉尘治理效果最佳。

, authors=陈景序副教授^{1, 2, 3}, 赵嘉诚¹, 曹成福¹, 刘业娇副教授^{1, 2, 3}, 荆德吉教授⁴, 智栐凯¹, authorsList=陈景序副教授, 赵嘉诚, 曹成福, 刘业娇副教授, 荆德吉教授, 智栐凯, authorCompany=null, correspAuthors=null, authorNote=, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=FTcw0CWZU15qdFPk6S7jcA==, magXml=8JgT1gqm5KTYWI7EXOeKCw==, pdfUrl=null, pdf=Cwuztk0dT4k+6o8hn2C4qQ==, pdfFileSize=2041491, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=ysUMAu3oO9SExEF0zyKyAw==, mapNumber=null, fund=null)}, authors=[Author(id=1281627187493180356, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1281627184414561204, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=chanjingxu@sina.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1281627187623203784, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1281627184414561204, authorId=1281627187493180356, language=EN, stringName=Jingxu CHEN, firstName=Jingxu, middleName=null, lastName=CHEN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=^{1, 2, 3}, address=¹School of Mining and Coal, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China
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陈景序（1989—），男，辽宁鞍山人，博士，副教授，主要从事粉尘防治理论及技术等方面的研究。E-mail:chanjingxu@sina.com。

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陈景序（1989—），男，辽宁鞍山人，博士，副教授，主要从事粉尘防治理论及技术等方面的研究。E-mail:chanjingxu@sina.com。

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