燃瓦斯气加热炉空气分级低氮燃烧数值模拟及验证  

Numerical Modeling and Validation of Air Staged Low Nitrogen Combustion in Heating Furnace Fired Refining Gas

作　　者：王义德 王华山[1] 孙巧群[3] 孙环 高建民[2] 刘同仁 王春生 WANG Yi-de;WANG Hua-shan;SUN Qiao-qun;SUN Huan;GAO Jian-min;LIU Tong-ren;WANG Chun-sheng(College of Vehicles and Energy,Yanshan University 1,Qinhuangdao 066004,China;Research Institute of Combustion Engineering,Harbin Institute of Technology 2,Harbin 150001,China;College of Aerospace and Civil Engineering,Harbin Engineering University3,Harbin 150001,China;Shandong Longfu Oil Shale Comprehensive Utilization Co.,Ltd.4,Longkou 265700,China)

机构地区：[1]燕山大学车辆与能源学院,秦皇岛066004 [2]哈尔滨工业大学燃烧工程研究所,哈尔滨150001 [3]哈尔滨工程大学航天与建筑工程学院,哈尔滨150001 [4]山东龙福油页岩综合利用有限公司,龙口265700

出　　处：《科学技术与工程》2018年第16期38-43,共6页Science Technology and Engineering

基　　金：十二五国家科技支撑计划(2014BAA07B03);国家自然科学基金(51506035);河北省高等学校科学技术研究项目(QN2017142);燕山大学博士基金(B989)资助

摘　　要：为实现燃瓦斯气加热炉NO_x排放低于200 mg/m3的目标,采用数值计算的方法对空气分级低氮技改方案进行了优化。利用FLUENT软件计算了燃尽风布置和当量比对温度分布、燃尽率和NO_x生成量等的影响规律;通过与工业试验对比验证了优化方案。结果表明:当燃烧区当量比约0.85时,NOx排放总量最小;当量比一定时,还原区段长度增大有利于NO_x量降低;燃尽风两级较单级布置可实现NOx的进一步降低;但其中热力型NOx占比增大。经改造后,加热炉NOx排放浓度低于200 mg/m3,满足现行法规要求;能够为燃气加热炉设计、运行及改造提供一定参考。In order to realize the goal that NOxemission below 200 mg/m^3 in heating furnace which fired refining gas,numerical modeling method was adopted to optimize the modification scheme by air staged low nitrogen combustion. The FLUENT software was used to investigate effects of burnout air arrangement and stoichiometric ratio on temperature distribution,fuel burn rate,NOxgeneration and so on,meanwhile industrial test was applied to validate the optimization scheme. The results showed that,the minimum amount of NOxoccurred when the stoichiometric is about 0. 85 in main combustion area. Increasing the reduced area length can reduce the NOxemission when the stoichiometric is constant. The two level burnout air arrangement can reduce NOx emission further,but the amount of thermal NOxis increased. After the reconstruction,the NOxemission concentration is lower than 200 mg/m^3,which meets the current regulation. Some reference can be provided for the design,operation and reconstruction in gas heating furnace.

关 键 词：加热炉 氮氧化物 空气分级 数值模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]