切圆燃烧锅炉冷灰斗高温腐蚀与运行防控分析  

Analysis on High Temperature Corrosion and Operation Prevention and Control of Ash Hopper of Tangentially Fired Boiler

作　　者：俞胜捷 杨清生 王小华[1] 丁奕文 陈敏[1] YU Shengjie;YANG Qingsheng;WANG Xiaohua;DING Yiwen;CHEN Min(Xi’an Thermal Power Research Institute Co.,Ltd..Suzhou Branch,Suzhou 215153,China;Maintenance center of China Huaneng Group Co..Ltd.,Beijing 100031,China)

机构地区：[1]西安热工研究院有限公司苏州分公司,江苏苏州215153 [2]中国华能集团有限公司检修中心,北京100031

出　　处：《锅炉技术》2022年第1期58-62,共5页Boiler Technology

摘　　要：燃煤锅炉采用深度空气分级低氮燃烧技术控制炉内NO;生成的同时,带来了严重的水冷壁高温腐蚀的问题,影响了机组的安全运行。以某660 MW超临界机组锅炉为研究对象,通过现场测试,研究了运行氧量、配风方式、磨煤机组合方式和配煤方式等对炉膛水冷壁高温腐蚀的影响特性,并通过运行参数的合理化设置改善了冷灰斗高温腐蚀的情况,取得了一定的效果。运行优化调整后,660 MW负荷优化工况下,冷灰斗区域烟气中CO体积分数平均值由调整前的52 125μL/L降为25 998μL/L,H_(2)S体积分数平均值由调整前的305μL/L降为100μL/L,降幅明显。但要根治高温腐蚀的问题,需从燃烧器和配风方式的改造角度综合进行治理。When deep air staged low nitrogen combustion technology is used to control NO;generation in coal-fired boiler, it brings serious high temperature corrosion of water wall and affects the safe operation of the unit. In this paper, a 660 MW supercritical unit boiler is taken as the research object. Through the field test, the influence characteristics of the operating oxygen content, air distribution mode, coal mill combination mode and coal blending mode on the high temperature corrosion of the furnace water wall are studied. Through the reasonable setting of the operating parameters, the high temperature corrosion of the cold ash hopper is improved, and a certain effect is achieved. After operation optimization and adjustment, under 660 MW load optimization condition, the average volume fraction of CO in the flue gas in the cold ash hopper area decreased from 52 125 μL/L to 25 998 μL/L, and the average volume fraction of H_(2)S decreased from 305 μL/L to 100 μL/L. However, in order to solve the problem of high temperature corrosion thoroughly, comprehensive treatment should be carried out from the perspective of burner and air distribution mode transformation.

关 键 词：燃煤锅炉 切圆燃烧方式 冷灰斗 高温腐蚀 CO体积分数 H_(2)S体积分数 优化调整 

分 类 号：TK229.2[动力工程及工程热物理—动力机械及工程]