600 MW电站锅炉引增合一改造流场数值模拟及性能研究  

Numerical Simulation of Flow Field and Performance Study of 600 MW Utility Boiler with Combination of Induced Draft Fan and Boost Up Fan

作　　者：黄思林 沈小兵 李英 HUANG Si-lin;SHEN Xiao-bing;LI Ying(National Energy Group Guangdong Electric Power Co.,Ltd.;National Energy Group Yuedian Taishan Power Generation Co.,Ltd.;National Energy Group Guohua(Beijing)Electric Power Research Institute Co.,Ltd.)

机构地区：[1]国家能源集团广东电力有限公司 [2]国能粤电台山发电有限公司 [3]国能国华(北京)电力研究院有限公司

出　　处：《电站系统工程》2023年第3期11-14,共4页Power System Engineering

摘　　要：针对某电厂600 MW机组锅炉进行增压风机与引风机合一改造后,锅炉尾部烟道系统阻力提高可能会引起炉膛发生内爆的安全问题,利用数值模拟技术对锅炉烟气系统进行了研究。模拟了锅炉发生主燃料跳闸工况下的锅炉烟气阻力的瞬态变化,计算结果表明:在MFT发生的3.5 s时炉膛中心达到负压最大值-8035.3 Pa,引风机的负压在0.8 s时达到最小值-3987.8 Pa,引风机的选型符合防爆要求。研究可为电站锅炉进行增压风机改造后烟气阻力提高的安全评估提供技术方法。For the safety problem of furnace implosion occurred in the boiler of a power plant 600MW unit boiler implementation of the booster up fan and the induced draft fan combined operating conditions,it was studied using numerical simulation techniques for the boiler flue gas system.This work simulates the transient changes in boiler flue gas resistance in the event of a main fuel trip condition in the boiler and the results of the calculations show that the negative pressure reaches a maximum value of-8035.3Pa in the centre of the furnace chamber at 3.5s when MFT occurs,and the negative pressure of the induced draft fan reaches a minimum value of-3987.8Pa at 0.8s,the selection of the induced draft fan meets the explosion-proof requirements.The results of this study can provide a technical method to assess the safety problems caused by increased flue gas resistance after booster fan retrofit in utility boilers.

关 键 词：电站锅炉 增压风机 引风机 数值模拟 内爆 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]