300MW褐煤富氧燃烧锅炉制粉系统仿真模型的研究  

Study on Pulverizing System Simulation Model of 300MW Lignite Oxygen-enriched Combustion Boiler

作　　者：高建强[1] 孙少东[1] Gao Jianqiang Sun Shaodong(School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China)

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《系统仿真学报》2017年第2期437-444,共8页Journal of System Simulation

基　　金：河北省自然科学基金(F2012502068)

摘　　要：以某300 MW褐煤富氧燃烧锅炉制粉系统为研究对象,建立其仿真模型。分别进行了原煤外在水分变化、给煤机转速扰动、磨煤机入口再循环烟气温度和流量扰动实验。结果表明:该模型能够正确模拟系统参数的动态变化过程;褐煤外在水分变化对磨煤机参数影响较大,尤其是褐煤水分小于30%时,外在水分减少,磨煤机出口煤粉温度显著升高;当磨煤机入口再循环烟气流量和给煤机转速发生扰动时,磨煤机出口参数变化明显,其中磨煤机出口水分变化幅度大,运行时应严格控制再循环烟气流量和给煤量的比例。The simulation model of the pulverizing system of a 300 MW lignite oxygen-enriched combustion boiler was developed. And the dynamic and static simulation experiments were completed, the experiments included lignite surface moisture content variation, disturbance of feeder norm speed, flue gas inlet temperature and flow rate etc. The results show that, the model is able to correctly simulate the dynamic process of the system. Moisture reduction has a larger impact on the pulverizing system operating parameters. The mill outlet temperature gets a significant rise, especially when it is less than 30%. When the feeder norm speed or flow rate of inlet flue gas changes, the mill outlet parameters change obviously, especially the moisture of pulverized coal Thus, the ratio of flue gas flow and coal should be controlled strictly by using re-circulation flue gas to dry high moisture lignite.

关 键 词：富氧 锅炉 褐煤 制粉系统 仿真 动态特性 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]