某电厂不同类型锅炉掺烧新疆淖毛湖高碱煤适应性研究  

Adaptability research of different types of boiler burning Naomaohu high-alkali coal inone power plant

作　　者：蒙玉仓 李炎[2] 杨忠灿[2] 祁青福 蒋泰宇 赵小兵[1] 聂明清 MENG Yucang;LI Yan;YANG Zhongcan;QI Qingfu;JIANG Taiyu;ZHAO Xiaobing;NIE Mingqing(Hongsheng Electric Company of Jiuquan Iron and Steel Co.,Ltd.,Jiayuguan 735100,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]酒钢集团宏晟电热公司,甘肃嘉峪关735100 [2]西安热工研究院有限公司,陕西西安710054

出　　处：《热力发电》2023年第7期142-149,共8页Thermal Power Generation

摘　　要：电站锅炉高比例掺烧高碱煤,会造成受热面严重结渣沾污,威胁电厂安全稳定生产。对比了甘肃某电厂3种不同类型锅炉掺烧新疆淖毛湖高碱煤炉况劣化前后的烟气温度变化,并对受热面沾污的灰渣进行了XRD物相分析和化学成分分析。分析结果表明:短时间粘结发展而成的灰块成分与煤灰成分接近,质地疏松,可通过优化吹灰保持受热面清洁;长时间沾污形成的管壳状渣块中富集SO3、Na2O,烧结程度高、质地坚硬,控制受热面入口烟气温度可有效缓解管屏沾污结渣;管屏间距50 mm左右的对流受热面,入口烟气温度应控制在800℃以下;管屏间距200 mm以上的对流受热面,入口烟气温度应控制在1 000℃以下。研究结果可为同类型锅炉掺烧高碱煤提供参考。Large proportion burning high-alkali coal will cause serious contamination to the heating surface of the boiler,and threat the device security and stable production of the power plant.The article compared flue gas temperature changes of three types of boilers burning Xinjiang Naomaohu high-alkali coal,XRD phase analysis and chemical composition analysis of ash slag was also performed.Analysis results indicate the composition of the ash block developed by short-term bonding is close to that of coal ash,and the texture is loose,and the heating surfaces can be kept clean by soot blowing optimization.The shell-like slag formed by long-term contamination is rich in SO3 and Na2O,the degree of sintering is high,and the texture is hard,controlling the flue gas temperature of the heating surface inlet can effectively reduce the fouling and slagging of the tube panel.The flue gas temperature at the convection heating surface inlet with tube panel gaps of about 50 mm should be controlled below 800℃,when the gaps are above 200 mm,the flue gas temperature should be controlled below 1000℃.The results of the research can be used as a reference for the same type of boiler burning high-alkali coal.

关 键 词：淖毛湖高碱煤 掺烧 结焦 沾污 锅炉 

分 类 号：TM621.2[电气工程—电力系统及自动化]