大型CFB锅炉高温分离器耐磨砖墙存在问题及改进措施  

Problems and measures of wear-resistant brick wall of high temperature cyclone in a large CFB boiler

作　　者：代泽华[1] 龚莲辉 龚兴利 营利萍 辛胜伟 Dai Zehua;Gong Lianhui;Gong Xingli;Ying Liping;Xin Shengwei(Sichuan Baima Circulating Fluidized Bed Exampled Power Co.,Ltd.,Neijiang 641005,Sichuan,China;不详)

机构地区：[1]四川白马循环流化床示范电站有限责任公司,四川内江641005 [2]无锡市宜刚耐火材料有限公司,江苏宜兴210000 [3]神华集团循环流化床技术研发中心,陕西西安710065

出　　处：《耐火材料》2021年第3期235-239,共5页Refractories

摘　　要：针对白马公司300 MW高温绝热式分离器长时间运行后出现膨胀缝和耐火砖缝间隙增大,高温烟气、物料进入墙体内,造成墙体耐磨砖大面积脱落,导致分离器壳体超温、壳体发红等问题,提出了改进措施。先在外筒壁上焊接耐热锚固件,再在保温层铺设250 mm厚的轻质保温可塑料,工作层铺设150 mm厚的SiC耐磨可塑料;优化施工,在分离器直段与顶部、入口烟道等区域接口处设计膨胀缝,严格按烘炉升温曲线进行烘炉。经改进后的高温绝热式分离器使用5年,再无壳体发红现象,改进效果明显。For the 300 MW high temperature insulation cyclone of Baima Company after long time running,the expansion joints and gaps between bricks enlarged,the high temperature flue gas and materials entered the wall,causing a large area of refractory brick spalling off,over-temperature of the cyclone shell,shell redness and other problems.Improvement measures were put forward:weld heat-resistant anchor parts on the outer cylinder wall,then lay 250 mm thick lightweight insulation plastic materials in the insulation layer and 150 mm thick SiC abrasion-resistant plastic materials on the working layer;optimize construction,design expansion joints at the areas such as direct part and top of the cyclone,the inlet flue pipe,and bake the oven strictly according to the heating curve.The improved high temperature insulation cyclone was used for 5 years,with no shell redness,showing obvious improvement effect.

关 键 词：高温绝热式分离器 耐磨砖 耐磨可塑料 膨胀缝 Y型抓钉 靶区 

分 类 号：TK17[动力工程及工程热物理—热能工程]