纵向控制流固定床在篦冷机改造中的应用  

Application of Longitudinal Controlled Flow Fixed Grate Bed in the Retrofit of Grate Cooler

作　　者：张传仁 郭红军 ZHANG Chuanren;GUO Hongjun(Zibo Traditional Industry Development Center,Zibo Shandong 255000,China;Zibo Kebang Thermal Technology Co.,Ltd.,Zibo Shandong 255000,China)

机构地区：[1]淄博市传统产业发展中心,山东淄博255000 [2]淄博科邦热工科技有限公司,山东淄博255000

出　　处：《水泥技术》2022年第4期27-33,共7页Cement Technology

摘　　要：介绍了第三、四代篦冷机固定篦床、活动篦床及风室、灰斗卸料密封等部件的改造方案。通过在高温落料端采用纵向控制流固定床,对固定篦床进行分区设置,配置穿透力强的急冷篦板,在供风管道安装电动蝶阀等,有效提高了固定篦床的冷却效率,实现了熟料的急冷。同时,通过采用纵向布置的通风槽,可以从多个方向对活动篦床上的熟料颗粒进行冷却,形成“交叉气流冷却篦床”,熟料料层厚度和移动速度得到有效控制。改造后,当热回收区内风机负荷率>95%时,二次风温稳定在1100℃以上,出篦冷机熟料温度<65℃+环境温度,熟料强度提高2~4MPa,物料细度提高。This paper introduces the transformation plan of the fixed grate bed,movable grate bed,air chamber,ash hopper discharge seal and other components of the third and fourth generation grate coolers.The cooling efficiency of the fixed grate bed is effectively improved by adopting the vertical control flow fixed grate bed at the high temperature blanking end,partitioning the fixed grate bed,configuring the quenching grate plate with strong penetrating power,and installing electric butterfly valves in the air supply duct to achieve the rapid cooling of clinker.At the same time,by using longitudinally arranged ventilation grooves,the clinker particles on the movable grate bed can be cooled from multiple directions to form a"cross-flow cooling grate bed",and the thickness and moving speed of the clinker layer can be effectively controlled.After the transformation,when the fan load rate in the heat recovery area is greater than 95%,the secondary air temperature is stable above 1100℃,the clinker temperature of the grate cooler is less than 65℃+ambient temperature,the clinker strength is increased by 2~4MPa,and the material fineness is improved.

关 键 词：固定篦床 二次风温 篦板风槽 冷却效率 

分 类 号：TQ172.622.4[化学工程—水泥工业]