风机选型与炉膛结构对高原燃气锅炉燃烧状况影响的数值模拟研究  

Numerical Simulation on the Combustion Condition of Plateau Gas-fired Boiler with Different Fan and Furnace Structure

作　　者：张井坤 刘雪敏[2] 于吉明 王玉涛 杜勇博 车得福[1] 笪耀东[2] ZHANG Jing-kun;LIU Xue-min;YU Ji-ming;WANG Yu-tao;DU Yong-bo;CHE De-fu;DA Yao-dong(State Key Laboratory of Multiphase Flow in Power Engineering,School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;China Special Equipment Inspection and Research Institute,Beijing 100029,China;Qinghai Special Equipment Inspection and Testing Institute,Xining 810003,China)

机构地区：[1]西安交通大学能源与动力工程学院,动力工程多相流国家重点实验室,陕西西安710049 [2]中国特种设备检测研究院,北京100029 [3]青海省特种设备检验检测院,青海西宁810003

出　　处：《节能技术》2022年第6期497-501,共5页Energy Conservation Technology

基　　金：国家重点研发计划(2021YFF0600603);市场监管总局科技计划(2020MK178)。

摘　　要：为了改善高原燃气锅炉运行时出现的出力不足与热效率下降等问题,本文采用数值模拟方法研究了高原条件下风机选型对燃气锅炉炉内燃烧状况的影响,进一步结合热力计算方法开展炉膛结构优化方法研究。结果表明:风机压头与流量不变时,炉膛前中部平均温度随海拔升高逐渐降低,而炉膛后部平均温度随海拔升高先升高后降低。风机修正后,高原地区供氧质量与平原地区一致,炉内平均温度随海拔升高而增加;相同海拔条件下,风机修正后的炉内平均温度高于风机不变时。“瘦长型”锅炉的NOx排放略高于原锅炉,但炉内温度水平与原锅炉较为接近。综合来看,“瘦长型”锅炉的高原运行性能优于原锅炉与“粗短型”锅炉,对高原燃气锅炉炉膛结构优化时可以选择该种炉型作为炉型优化方向之一。To improve the problems of insufficient output and decreasing thermal efficiency for plateau gas-fired boilers,the combustion condition was studied by numerical simulation method under different altitudes,and the furnace structure optimization was further carried out by thermal calculation and numerical simulation.The results show that:when the fan pressure and flow are constant,the average temperature of the front and middle part of the lanky furnace gradually decreases with increasing altitude,but the average temperature of the rear of the furnace increases first and then decreases with increasing altitude.When the fan is corrected,the oxygen quality keeps the same with high altitude,the average temperature in the furnace increases with increasing altitude;Under the same altitude,the average temperature of the fan correction in the furnace after is higher than the uncorrected fan.The NOxemission of the lanky boiler is slightly higher than the original boiler,but the temperature level in the furnace is relatively close to the original boiler.And the operating performance of the lanky boiler is better than the original boiler and stubby boiler.

关 键 词：高原 燃气锅炉 温度分布 炉膛结构优化 数值模拟 

分 类 号：TK229.8[动力工程及工程热物理—动力机械及工程]