500MW塔式锅炉辐射过热器悬吊管泄漏对策研究  

Countermeasuresfor the Leakage Problem of the Radiation Super-Heater Hanger Tubesin a 500 MW Tower Boiler

作　　者：高如云 贠念增 郭小兵 严林博[2] 何伯述[2] 

机构地区：[1]神华国能神头第二发电厂,山西朔州036000 [2]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《神华科技》2014年第6期55-59,共5页Shenhua Science and Technology

摘　　要：神头第二发电厂#1机组配备500MW塔式锅炉。由于设计等方面的原因,该锅炉存在省煤器入口温度设计过低,致使蒸发受热面产汽量不足,导致过热器超温现象严重、排烟温度过高、锅炉效率较低,严重影响了锅炉的整体经济性。近年来,入炉煤质变化过大,对锅炉燃烧及锅炉整体经济性能及安全性能影响更大,需要就过热器超温的问题开展专题攻关研究,达到治理辐射过热器悬吊管泄漏现象的目的,最终实现锅炉效率的提高,实现机组更加经济地运行的目标。文章针对该锅炉所存在的问题,提出了四种改造方案(改造方案A、B、C、D),并对四种方案的改造效果进行了预测。所提出的改造方案对国内存在类似问题的同类锅炉具有较好的参考价值。#1 Unit in our power plant is assembled with a 500 MW scale tower type boiler.For the design de-fect of the boiler, the inlet water temperate of the economizer is very low, which leads the under productionof steam from the steam generator and, consequently, leads the overheat of the super-heater, extra high tem-perature of the exhaust gas and the low efficiency of the boiler. All those problems have negative impactson the security and economics of the power plant. Furthermore, the feed coal quality varies greatly in recentyears, which has higher adverse impact on the overall security and economy performance of the boiler. Thus,immediate measures are needed to solve the problems of the super-heater overheating and the leakage of itshanger tube so as to achieve the object of highly safe and efficient operation of the Unit. Four retrofitschemes （schemes A, B, C and D） are provided in this work and thermal checking calculation are used topredict the retrofit effect of the four schemes. The retrofit schemesare of reference value for other large scaletower type boilers suffering similar problems.

关 键 词：辐射过热器 悬吊管 泄漏 塔式锅炉 

分 类 号：TK22[动力工程及工程热物理—动力机械及工程]