2016年第12期（总第228期）
doi;10.3969/j. issn. 1009 3230.2016.12.008
应用能源技术
25
W锅炉重油点火启动拱下水冷壁结焦原因分析及对策
朱家英
（中国大唐集团科学技术研究院有限公司华中分公司，郑州450000）
摘要：W火焰锅炉采用重油点火方式启动，拱下水冷壁容易结焦。基于一台新建锅炉启动过程中拱下水冷壁的结焦情况，分析了其结焦原因，主要原因有喷嘴距离水冷壁过近，油雾直接冲剧水冷壁；油枪保护套管设计过短，火焰刚性不足；重油高温下析碳结焦，堵塞喷嘴等。针对这些原因采取了相应的防结焦措施。实施这些措施后，结焦现象明显改善，在锅炉以后的启动过程中，油枪护率及其拱下水冷壁上均未出现油焦。同时电改善油枪的雾化，保证了油枪长期、持续运行。
关键调：W锅炉；油枪；重油点火；结焦；改善
中图分类号：TK229.4文献标志码：B文章编号：1009-3230(2016)12-0025-05
Analysis and Solving Measures of Water Wall below the Arch Coking
in"W" Style Boiler during Heavy Oil Ignition Start -up
ZHU Jiaying
(China Datang Corporation Science and Technological Research Institute Co., Ltd. in Central
China Branch,Zhengzhou 450000, China)
Abstract: Water wall below the arch coking occurs more frequently in * W" style boiler during heavy oil ignite start up. Based on a water wall below the arch coking problem during the start - up process of a new w" style boiler, the paper analyzed the coking causes were that too close distance from nozzle to water wall, result in oil mist directly scouring water wall due to the poor atomization, the design deficiency of oil gun protecting sleeve result in flame less rigid, heavy oil coking clogged nozzle at high temperature, etc. Finally, according to these causes, the corresponding solving measures of coking were put forward, whose effect was obvious: there was no oil coking in the region oil gun shield and water wall blow the arch.At the same time, improve atomizing of the oil gun, ensure the oil gun long time and continuous running-
Key words: "w" style boiler; Oil gun; Heavy oil ignition; Coking; Improve
0引言
电厂锅炉燃用的重油发热量高、价格低廉，但重油燃烧时也经常出现以下问题：①燃烧不完全，冒黑烟；②高温下析碳，堵塞油枪喷嘴；③喷嘴附近区域或锅炉尾部低温受热面上结焦；④粘度过大，流动性差，容易造成枪管堵塞，并且清理困难。
收稿日期：2016-1025
修订日期：2016-11-18
作者篇介：宋家英（1984-），男，硕士，工程师。万方数据
本文通过一台新建机组锅炉在启动过程中发生的油枪护罩及其附近拱下水冷壁区域结焦情况，分析其结焦的原因，给出防止W锅炉重油点火启动
时发生结焦的措施。 1
锅炉简介 1.1燃烧设备布置
越南某电厂一期工程1、2号锅炉系东方锅炉厂生产的亚临界压力中间一次再热自然循环锅