中小型煤粉炉的运行优化  

Optimized Operation of Medium and Small-sized Pulverized Coal-fired Boilers

作　　者：吕泽华[1] 徐春晖[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《热能动力工程》2002年第1期90-91,共2页Journal of Engineering for Thermal Energy and Power

基　　金：国家攀登计划B基金资助项目 (85 -3 5 )

摘　　要：提高中小型煤粉炉的运行效率 ,控制其在最佳风煤比运行一直是个难题 ,原因是最佳风煤比是随炉况、负荷、煤种变化的 ,是非定常的。本文由计算锅炉效率的反平衡法出发 ,以炉膛出口温度和排烟温度为主导因素 ,论证得到寻求最佳风煤比的热效率判据 ,进而由自学习系统建立知识库 ,得到以负荷和煤种为参变量 ,以表征最佳风煤比的烟气含氧量为应变量的二维模糊决策表 。The enhancement of operating efficiency of medium and small-sized pulverized coal-fired boilers with their operation controlled at an optimum air-coal ratio has always been a difficult issue. This comes about because the optimum air-coal ratio varies with boiler conditions, boiler load and ranks of coal fired and assumes a non-steady magnitude. Proceeding from the reverse balance method of boiler efficiency calculation mid by taking furnace outlet temperature and exhaust gas temperature as major factors the authors have derived by logical reasoning the thermal efficiency judgement criteria for seeking an optimum air-coal ratio. On this basis a knowledge base was set up by a self-study system. As a result, a two-dimensional fuzzy decision table can he obtained. It has the boiler load and coal rank serving as parametric variables and the oxygen content of flue gas, which characterizes the optimum air-coal ratio, serving as dependent variables. This approach has solved the difficult problem of how to attain the high-efficiency operation of medium and small-sized pulverized coal-fired boilers during their on-line and real-time control.

关 键 词：最佳风煤比 热效率判据 模糊决策表 运行优化 中小型 煤粉炉 燃煤锅炉 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]