过热器减温水过量的治理改造与实施效果  

Retrofit for Excessive Desuperheating Water of Superheater and Its Implementation Effect

作　　者：严林博[1] 何伯述[1] 孟建国[2] 元怀全 许尧[4] 张爱军 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044 [2]河北大唐国际王滩发电有限责任公司,唐山063611 [3]内蒙古大唐国际托克托发电有限责任公司,呼和浩特010206 [4]华北电力科学研究院有限责任公司,北京100045

出　　处：《动力工程》2010年第2期83-90,共8页Power Engineering

摘　　要：针对某电厂5号锅炉实际运行过程中存在的过热器减温水过量的问题,提出了4种受热面改造方案,通过对4种改造方案热力计算结果的对比分析,最终选择方案A对锅炉尾部受热面进行了初步改造.改造后的实际运行和性能试验数据表明:在不同负荷工况下,过热器减温水总量明显下降,平均下降约100 t/h;省煤器出口欠焓在允许范围内,保证了锅炉水循环的安全性;机组整体的经济性、安全性及可调性都得到提高,改造取得了圆满成功.Aiming at the problem of excessive desuperheating water of the superheater during the actual operation of the boiler No.5,four retrofit schemes were proposed for the heat-absorbing surface.Through comparison and analysis for the thermal calculation results of the four retrofit schemes,scheme A was finally chosen for the primary retrofit of the tail heat-absorbing surface of the boiler.The actual operation and performance test data after retrofit indicate that the total amount of desuperheating water of superheater decreases obviously,with average drop of 100 t/h under different operational conditions.The enthalpy needed for saturation at outlet of the economizer is within allowable range,which ensures the safety of the water circulation of the boiler.The integral economy,safety and controllability of the unit are improved,and the retrofit is successful.

关 键 词：煤粉锅炉 过热器 减温水量 受热面 热力计算 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]