中储式钢球磨锅炉飞灰含碳量偏高的原因分析及对策  

Analysis and countermeasures of high carbon content in fly ash of medium storage steel ball mill boiler

作　　者：方建 钱芳树 吴伟 陈晓玮 刘良喜 楼勇 施子福 黄群星[2] FANG Jian;QIAN Fang-shu;WU Wei;CHEN Xiao-wei;LIU Liang-xi;LOU Yong;SHI Zi-fu;HUANG Qun-xing(Zhejiang Juhua Thermal Power Co.,Ltd.,Quzhou 324004;State Key Laborator of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江巨化热电有限公司,浙江衢州324004 [2]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《能源工程》2022年第1期68-73,共6页Energy Engineering

摘　　要：针对某热电厂7号锅炉飞灰含碳量偏高的问题进行研究,分析主要原因是入炉煤粉细度较粗、一次风喷口风速偏高、二次风喷口风速偏低以及周界风喷口风速不均且偏高所致。对此进行锅炉燃烧优化调整,通过减小粗粉分离器上层挡板角度、降低一次风喷口风速、增大二次风小风门开度以及减小周界风小风门开度实现降低飞灰含碳量的目的。燃烧优化调整后平均飞灰含碳量降低约3.2%,全年可节省标煤耗约1954 t,在显著提高锅炉运行经济性的同时全年可降低CO_(2)排放量约5419 t。The problem of high carbon content in fly ash of a thermal power plant#7 boiler is studied.The main reasons are coarse fineness of pulverized coal,high wind speed at primary air nozzle,low wind speed at secondary air nozzle and uneven and high wind speed at peripheral air nozzle.The boiler combustion is optimized and adjusted.The purpose of reducing the carbon content of fly ash is achieved by reducing the angle of the upper baffle of the coarse powder separator,reducing the wind speed of the primary air nozzle,reducing the opening of the small air valve of the secondary air and increasing the opening of the small air valve of the peripheral air.After combustion optimization and adjustment,the average carbon content of fly ash is reduced by 3.2%,and the annual standard coal consumption can be saved by about 1954 t.While significantly improving the boiler operation economy,the annual CO_(2) emission can be reduced by about 5419 t.

关 键 词：中储式钢球磨 节能 飞灰含碳量 优化 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]