耐高温烟气金属电袋复合除尘器在氢氧化铝焙烧炉超低排放中的应用  

Application of High-Temperature Flue Gas Resistant MetalElectric Bag Composite Dust Collector in Ultra-LowEmission of Aluminum Hydroxide Calciner

作　　者：王向伟 WANG Xiangwei

机构地区：[1]中铝郑州有色金属研究院有限公司,河南郑州450041 [2]河南华慧有色工程设计有限公司,河南郑州450041

出　　处：《绿色矿冶》2023年第6期39-43,共5页Sustainable Mining and Metallurgy

摘　　要：根据国家超低排放的要求,分析了常规的电除尘器、布袋除尘器、电袋复合除尘器处理氢氧化铝焙烧炉烟气的局限性,提出耐高温金属滤袋电袋复合除尘器是目前实现氢氧化铝焙烧炉烟气达到超低排放的最佳选择,并详细分析了耐高温金属滤袋电袋复合除尘器的原理及技术特点。以某氧化铝厂氢氧化铝焙烧炉电除尘器改造为电袋复合除尘器的具体工程实践为例,介绍了耐高温金属滤袋电袋复合除尘器改造的技术方案及应用效果。工程实践应用表明,采用耐高温金属电袋复合除尘器,除尘器出口粉尘排放浓度低于5 mg/Nm 3,除尘器最大阻力小于800 Pa,完全符合国家超低排放要求。耐高温金属滤袋电袋复合除尘器综合了电除尘器和袋式除尘器的优点,不受燃料和粉尘性质限制,对微细超细粒子的捕集效率高,具备适用范围广,耐高温、耐腐蚀,除尘效率高,运行阻力相对较低的优势。According to the requirements of national ultra-low emissions,the paper analysed the limitations of the conventional electric precipitator,bag dust collector,electric bag composite dust collector in processing flue gas of aluminum hydroxide calciner,and put forward that the high temperature resistant metal electric bag composite dust collector is the best choice of aluminum hydroxide calciner to achieve ultra-low emissions,and analysed in detail the principle and technical characteristics of high temperature resistant metal electric bag composite dust collector.Taking one aluminum company s ultra-low emission reconstruction of aluminum hydroxide calciner as an example,the technical scheme and application effect were introduced.The engineering practice shows that using the high temperature resistant metal electric bag composite dust collector,the dust emission concentration at the outlet of the dust collector is less than 5 mg/Nm 3,and the maximum resistance of the dust collector is less than 800 Pa,which fully meets the national ultra-low emission requirements.The high temperature resistant metal filter bag electric bag composite dust collector combines the advantages of electrostatic precipitator and bag filter.It is not limited by fuel and dust property,and has high capture efficiency for fine ultrafine particles.It has the advantages of wide application range,high temperature resistance,corrosion resistance,high dust removal efficiency and relatively low operating resistance.

关 键 词：氢氧化铝焙烧炉 高温烟气 电除尘器 布袋除尘器 电袋复合除尘器 

分 类 号：TF821[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]