式提升机的泄爆排气

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1、斗式提升机的泄爆排气摘要Thispaperisareportofanexperimentalprogrammeontheexplosionprotectionofbucketelevatorsbyventing.TheprojectwasacollaborativeeffortwithfundingbytheHealthandSafetyExecutiveandmanufacturersandusersofbucketelevatorsthroughtheBritishMaterialsHandlingBoard.Twobucketelevatorswereusedinth

2、eproject—asinglelegelevatorandatwin-legelevator.FourdustswereusedwithKStvaluesupto211barms−1anddustcloudswereproducedbydustinjectionandbynormaloperation.Reducedexplosionpressuresweremeasuredandguidancehasbeenderivedfromtheresults.ThisguidanceisintermsofventspacingasafunctionoftheKStvalueof

3、thedust.本文介绍附在斗式提升机上的防爆装置的泄爆实验。该项目是由卫生安全部门以及制造商和用户委托英国材料处理部门执行。两斗式提升机中使用了一个单腿电梯和一双腿电梯。测量了爆炸压力和已经衍生出的结果。本指南是根据排气间距为尘埃中的值函数。Keywords关键词：粉尘爆炸；发泄；斗式提升机Bucketelevatorsarewidelyusedinthehandlingoflargequantitiesofbulkpowdersandarenormallythepreferredmeansofconveyingwherelongverticalliftsarerequi

4、redforfreeflowingpowders/granularproducts.Assuchtheyaretobefoundinnearlyallanimalfeedmills,bulkgrainstoresandmanyofthelargerinstallationshandlingpowdersinthefoodindustry.Powderorgranularproductsinevitablyspillfromthebucketsduringoperationandfalldowntheuplegoftheelevator.Thefinermaterialisl

5、ikelytoremaininsuspensionwhilethecoarsermaterialfallsbacktotheboot.Atthetopoftheelevatormostofthepowderwilldischargedowntheoff-takechute,butsomewillnormallybecarriedoverintothedownlegoftheelevator.Thusbothlegsarelikelytocontainadustcloudofunknownconcentration,constantlyagitatedbythemovingb

6、uckets,allthetimetheelevatorisinoperation.Varioussourcesofignitionareforeseeableinsuchunitsandexplosionincidentshavebeenreported.斗式提升机广泛应用于处理大批量散装粉末，是自由流动的粉末或颗粒长距离垂直输送优先选择。正是因为这样他们可以在几乎所有的动物饲料以及散装谷物的商店和许多大型设备在食品工业中用于处理粉末。粉末或颗粒状产品在操作中不可避免地溢出。较细的物料可能会保持在悬浮液中而较粗的物料落回地面。在斗提机顶部的大多数粉末会从出料口流出，但有一

7、些粉末通常会被带到斗提机的下部。因此，在斗提机运行的整个过程中两条输送带可能含有未知浓度的粉尘云，不断的被搅动着。各种可预见的火灾和爆炸事件纷纷报道出来。Explosionventingisonemethodforexplosionprotectionofbucketelevators.ThecurrentInstitutionofChemicalEngineersguidancerequiresthatthevents—equalincrosssectionalareatothelimb—arepositione