工业硅余热锅炉结渣和积灰特性研究  

Research on Slagging and Fouling Characteristics in the Waste-heat Recovery Boiler for Industrial Silicon Furnace

作　　者：潘佩媛 陈衡 赵钦新[2] 徐钢[1] 张鄂婴 李秋梅 PAN Peiyuan;CHEN Heng;ZHAO Qinxin;XU Gang;ZHANG Eying;LI Qiumei(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China;Jiangsu Sifang Boiler Co.,Ltd.,Xuzhou 221142,Jiangsu,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]西安交通大学能源与动力工程学院,陕西西安710049 [3]江苏四方锅炉有限公司,江苏徐州221142

出　　处：《工业锅炉》2022年第4期1-8,共8页Industrial Boilers

基　　金：国家自然科学基金青年项目(52106008)。

摘　　要：为了探究和解决工业硅余热锅炉面临的严重结渣和积灰问题,从运行现场采集灰渣样品,分析其微观形貌和粒度分布,利用XRD/Rietveld全谱拟合方法得到非晶和晶体组分的半定量质量分数。结果表明,工业硅余热锅炉灰渣的主要成分为纳米级的无定形SiO_(2)、方石英和石英晶体颗粒。高温段以结渣为主,无定形SiO_(2)含量超过60%,其部分熔融导致颗粒黏结形成连续渣块。低温段以积灰为主,无定形SiO_(2)含量约40%,形成疏松脆性灰块。锅炉不同部位的传热元件及清灰方法应根据上述结渣与积灰特征进行合理选择。In order to study and solve the serious slagging and ash deposition problems faced by the waste-heat recovery boilers for industrial silicon furnaces, ash and slag samples were collected from a boiler in operation, and their microscopic morphology and particle size distribution were analyzed. XRD/Rietveld full spectrum fitting method was used to obtain semi-quantitative mass fractions of the amorphous and crystalline components. The results show that the main components of the ashes and slags from the waste-heat boiler for industrial silicon furnace were nano-scale particles of amorphous SiO_(2), cristobalite and quartz crystals.The problem in the high-temperature section was mainly slagging, and the amorphous SiO_(2) content exceeded 60%, partly melting of the amorphous SiOled to adhesion of the particles and formation of continuous clinkers.The low-temperature section was more influenced by fouling, and the amorphous SiO_(2) content was about 40%, forming loose and fragile ash blocks. The heat exchange element type and ash removing method for different sections of the boiler should be properly arranged based on the slagging and ash deposition characteristics described above.

关 键 词：工业硅 余热锅炉 结渣 积灰 二氧化硅 

分 类 号：TK229.929[动力工程及工程热物理—动力机械及工程] TK227.2