循环流化床锅炉床温动态建模与仿真  

Dynamic Modeling and Simulation for Bed Temperature of Circulating Fluidized Bed Boiler

作　　者：佘文武[1] 曹志凯[1] 江青茵[1] 吴松涛[1] 

机构地区：[1]厦门大学化学化工学院化学工程与生物工程系,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2006年第1期80-84,共5页Journal of Xiamen University：Natural Science

摘　　要：在分析了循环流化床锅炉床内温度动态特性的基础上,通过对循环流化床锅炉动态特性的主导过程-动态物料平衡,动态残碳量平衡以及动态能量平衡以及辅助过程-氧气浓度平衡,焦炭颗粒能量平衡的描述,建立了以给煤、一次风、二次风和排渣为输入变量的动态模型.结合某220 t/h循环流化床锅炉的现场数据,采用MATLAB 6.5软件对所建模型进行了连续脉冲动态仿真和实时仿真,连续脉冲动态仿真结果可以很好地反映输入脉冲变量发生变化时床温的动态响应情况,实时仿真结果与现场采集到的数据能够很好吻合.Based on the analysis of dynamic traits of CFBB,this paper gave good descriptions of dynamic processes of CFBB,such as dynamic mass balance of total bed inventory, dynamic carbon mass balance and dynamic energy balance. Then a simplified model was then proposed for the dynamic simulation of the bed temperature of CFBB, which considered the rate of coal feed, primary air, secondary air and bottom ash removal as inputs. Combining with the data obtained from the actual process of a 220t/h CFBB, the step changes simulation and the real-time simulation were implemented by the powerful technical-computing language-Matlab 6.5. The results of the step change simulation reflected well the transient dynamic response of bed temperature when inputs were changed,and the real-time simulation was in good agreement with the actual data.

关 键 词：循环流化床锅炉 床温 建模 动态仿真 实时仿真 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程] TP391.9[自动化与计算机技术—计算机应用技术]