除氯系统对水泥窑协同处置含氯固废的影响分析

Analysis of the Impact of Chlorine Removal System on the Collaborative Disposal of Chlorine Containing Solid Waste in Cement Kilns

水泥窑协同处置固废技术具有环境友好、处置高效、技术可靠等显著优势,但固体废物的氯离子含量偏高,导致预分解窑系统结皮严重,固废入窑处置量减少。分析了水泥熟料煅烧过程中氯盐在窑尾系统内循环富集的过程,对比研究了除氯系统开启前后以及不同固废投加量对水泥窑系统运行的影响。结果表明,除氯系统的运行显著降低了氯元素在窑系统的循环量,减少了预分解窑系统结皮现象,提高了固废投加量。在实际生产过程中,应结合不同阶段原燃材料的氯含量本底浓度及固废中的有害元素成分情况,及时调整除氯系统放风率及开启时长,以优化除氯系统运行成本及热能损失。

The collaborative disposal of solid waste in cement kilns has significant advantages such as environmental friendliness,efficient disposal,and reliable technology.However,the high chloride ion content in solid waste leads to severe crust formation in the pre decomposition kiln system,resulting in a reduction in the amount of solid waste disposed of in the kiln.The process of chloride salt circulation and enrichment in the preheater system during the calcination of cement clinker was analyzed,and the effects of the chlorine removal system before and after opening,as well as different solid waste dosages,on the operation of the cement kiln system were compared and studied.The results showed that the operation of the chlorine removal system significantly reduced the circulation of chlorine elements in the kiln system,reduced the phenomenon of crust formation in the pre decomposition kiln system,and increased the amount of solid waste added.In the actual production process,the chlorine content and background concentration of raw materials at different stages,as well as the harmful element composition in solid waste,should be combined to adjust the exhaust rate and opening time of the chlorine removal system in a timely manner,in order to optimize the operating cost and heat loss of the chlorine removal system.