锅炉冷态空气动力场试验解决热态运行问题的研究  

Study on solving hot running problem by cold state aerodynamic field test of boiler

作　　者：姬亚 JI Ya

机构地区：[1]大唐华中电力试验研究院,河南郑州450000

出　　处：《节能》2020年第8期43-46,共4页Energy Conservation

摘　　要：某630 MW超临界对冲燃烧锅炉检修前存在高负荷再热器减温水量高及省煤器出口A、B侧氧量偏差大的问题。为解决以上问题,进行了冷态空气动力场试验(以下简称"冷态试验")并针对性设置试验项目。试验前对燃烧器进行冷态检查并处理存在的问题,以优化热态燃烧组织工况。试验中发现,原始工况上、下层燃尽风中心风速均偏低且下层燃尽风整体风速偏低,通过调整燃尽风调节装置开度提高了上述风速。经过上述检查及调整工作,机组启动后高负荷再热器减温水量大幅降低。通过对燃烧器和燃尽风各调节装置原始开度进行调整以及在一次风调平中尽量使A侧一次风速大于B侧,机组启动后A、B侧氧量偏差基本消除。Before the maintenance of a 630 MW supercritical opposed-firing boiler, there were problems such as the high attemperation water flow of reheater at high load condition and the large oxygen content deviation at the outlets of economizer A and economizer B. To solve the above problems, a cold state aerodynamic field test(hereinafter referred to as the cold state test) was carried out and the test items were set up specifically. Before the test, the burners were checked in cold state and the existing problems were solved to optimize the combustion organization under hot condition. In the test, it was found that the velocity of central air of the upper and lower over-fire air, and the overall velocity of the lower over-fire air were both low under the original condition. The above velocity was increased by adjusting the opening degree of overfire air adjusting devices. After the above checking and adjusting work, the attemperation water flow of reheater at highload condition was greatly reduced after unit start-up. By adjusting the original opening degree of the adjusting devices of pulverized coal burners and over-fire air, and by trying to make the primary air velocity on side A greater than that on side B during the leveling of primary air, the oxygen content deviation between side A and side B was basically eliminated after unit start-up.

关 键 词：燃煤锅炉 对冲燃烧 冷态空气动力场试验 再热器减温水量 氧量偏差 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]