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1、内蒙古科技大学毕业设计说明书(毕业论文)毕业设计说明书高炉布袋除尘的MCGS-PLC控制系统-43-内蒙古科技大学毕业设计说明书(毕业论文)摘要高炉在生产过程中,会从炉顶排出大量煤气,其中含有大量粉尘,严重影响了高炉煤气的利用。因此高炉煤气需先进行净化。布袋除尘作为一种煤气除尘方式目前被很多高炉采用。布袋除尘器于19世纪中叶开始被应用于工业生产,其运行稳定可靠、使用灵活、操作简单、除尘效率高、能够满足严格的环保要求。自上世纪70年代以来,我国在中小高炉上推广使用干式布袋除尘的工艺技术,近20年来,诸多冶金企业在使用此技术中不断总结经验,进行技术改造,使之趋于完善。目前
2、布袋除尘器作为高炉煤气精除尘设备已被我国小高炉广泛采用。具有除尘效率高、运行稳定、节能、投资少、生产运行费用低和解决环保问题等优点。布袋除尘器的除尘效率在99%以上,压力损失小于2000Pa,净煤气含尘量可降低到5mg/m3以下。本设计采用的是逆气流反吹净煤气净化工艺。采用分室工作制,按照时间和压差两种反吹制度使阀门自动开闭,逐室地进行反吹。关键词:高炉煤气,布袋除尘,逆气流反吹-43-内蒙古科技大学毕业设计说明书(毕业论文)AbstractTheblastfurnaceintheproductionprocess,candischargethemassivecoal
3、gasesfromthefurnacetop,inwhichincludesthemassivedust,seriouslyhasaffectedtheblastfurnacecoalgasuse.Thereforeblastfurnace,Thecoalgasmustfirstcarryonthepurification.Theclothsackdustremovaltakesonecoalgasdustremovalwayatpresentbytheverymanyblastfurnacesuse.Theclothsackdustremovertheleafsta
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5、lothsackremovesdust,intherecent20years,manymetallurgybusinessIndustryinusesinthistechnologyunceasinglytosumupexperience,carriesonthetechnologicaltransformations,enableittotendtotheconsummation.Atpresenttheclothsackdustremovaltakestheblastfurnacecoalgasfinedustremovalalreadybytheourcount
6、rysmallfurnacewidespreaduse.Hasthedustremovalefficiencyhigh,themovementisstable,theenergyconservation,investsfewTheproductionoperatingcostislowandmeritandsoonsolutionenvironmentalprotectionquestion.Theclothsackdustremoverdustremovalefficiencyabove99%,theresistancelossissmallerthan2000Pa
7、,onlyThecoalgasdustcontentmayreachbelow5mg/m3.Thisdesignusesisthecounteraircurrentinsteadblowsthecoalgaspurificationcraft.Usestheseparatingroomworksystem,pressestwokindsaccordingtothetimeandthedifferenceinsteadtoblowthesystemtocausethevalveautomaticallytoopenShuts,carriesonbyth