锅炉灰污染损失数学模型  

Mathematical Model of Thermal Loss of Utility Boiler Caused by Ash Deposition

作　　者：徐啸虎[1] 周克毅[1] 胥建群[1] 

机构地区：[1]东南大学能源与环境学院,江苏省南京市210096

出　　处：《中国电机工程学报》2010年第32期20-24,共5页Proceedings of the CSEE

摘　　要：电站燃煤锅炉运行中,灰污染使得传热热阻变大,导致排烟热损失增加,锅炉效率降低。由灰污染引起的实际运行状态与无灰污染状态时的锅炉效率偏差即为灰污染损失。文中建立了灰污染损失的计算模型,包括排烟温度偏差和传热量偏差2个子模型,介绍了建模原理和方法,并对模型的正确性进行了初步验证。所建模型基于能量守恒和换热过程一般原理,建模和偏差分析过程均不涉及任何线性化的数学处理,因而保证了模型计算结果与真实值的一致性。In the heat transfer process of coal-fired utility boilers,ash deposition increases the thermal resistance of the heating surfaces,causing thermal loss of the exhaust gas increases and boiler efficiency reduces.Due to this ash pollution,the deviation of efficiency would appear between the actual running state and no ash fouling state of the boiler.The mathematical model for computing this thermal loss was established,including two sub models： exhaust gas temperature deviations model and heat transfer quantity deviation model.These models were based on the conservation of energy and the general principle of the heat transfer process.And the process of modeling and deviation analysis did not involve any linear mathematical treatments.It ensures the consistency in the results of model calculation and the actual running.

关 键 词：电站锅炉 灰污染 数学模型 性能分析 

分 类 号：TK122[动力工程及工程热物理—工程热物理]