毕业论文：高炉布袋除尘的MCGS-PLC控制系统.doc

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
Abstract
The blast furnace in the production process, can discharge the massive coal gases from the furnace top, in which includes the massive dust, seriously has affected the blast furnace coal gas use. Therefore blast furnace, The coal gas must first carry on the purification. The cloth sack dust removal takes one coal gas dust removal way at present by the very many blast furnaces use.
The cloth sack dust remover the leaf starts in 19th century to apply to the industrial production, its movement stable reliable, the use nimble, operates, the dust removal efficiency simply is high, Can satisfy the strict environmental protection request.
Since on century 70's, our country has promoted the craft technology on the center small furnace which the use doing -like cloth sack removes dust, in the recent 20 years, many metallurgy business Industry in uses in this technology unceasingly to sum up experience, carries on the technological transformations, enable it to tend to the consummation.
At present the cloth sack dust removal takes the blast furnace coal gas fine dust removal already by the our country small furnace widespread use. Has the dust removal efficiency high, the movement is stable, the energy conservation, invests few The production operating cost is low and merit and so on solution environmental protection question. The cloth sack dust remover dust removal efficiency above 99%, the resistance loss is smaller than 2000Pa, only The coal gas dust content may reach below 5mg/m3.
This design uses is the counter air current instead blows the