炉内配风方式对锅炉经济性的影响  

INFLUENCE OF AIR DISTRIBUTIOM IN THE FURNACE ON ECONOMICAL OPERATION OF THE BOILER

作　　者：吴东垠[1] 魏小林[2] 盛宏至[2] 徐永香[2] 李华民[3] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]中国科学院力学研究所,北京100080 [3]华能天津杨柳青发电厂,天津300380

出　　处：《工程热物理学报》2005年第1期163-166,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50376068)

摘　　要：本文以炉内配风方式对锅炉经济性的影响为研究对象。当机组负荷为300 MW时,省煤器出口的最佳氧量为3.4％左右;当机组负荷为225 MW时,省煤器出口的最佳氧量为4.6％左右;就二次风的组合方式而言,在高温区保持适宜的氧气浓度,可以提高反应速度,保证煤粉颗粒的燃尽,提高锅炉的经济性,而燃尽风的风门开度选择主要考虑降低锅炉的气体排放物(丰要是NOx),对炉内燃烧效果影响不大。The influence of air distribution in the furnace on economical operation of the boiler is investigated. For 300 MWe electrical load, the optimal O2 concentration is 3.4% at outlet of economizer, and for 225 MWe electrical load, the optimal O2 concentration is 4.6%. From the view of assembled way of secondary airs, the optimal O2 concentration maintained in the high temperature zone can enhance the char reactive rate and improve the burnout of coal particle as well as the economical operation of the boiler. The selection of opening degree of the burnout air value is concerned to decrease the pollutant emission (mainly for NOx), which only has less influence on the combustion efficiency in the furnace.

关 键 词：锅炉 总风量 二次风 经济性 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]