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对珞璜电厂引进法国Stein公司 36 0MW的W型火焰锅炉进行了冷态模化研究 .采用热线风速仪对炉内流场进行测试 ,在此基础上研究了炉膛喉口面积对炉内空气动力场的影响规律 ,得出了在不同相对喉口面积下的炉内气流流场图 ,并对炉内气流速度分布、气流充满度和平均有效动量流率等进行了比较与分析 .研究表明 ,适当缩小炉膛喉口面积 ,一方面有利于喷入炉内煤粉的着火和燃尽 ,另一方面有利于减小高温烟气对喉口和前、后拱及冷灰斗的冲击 ,从而达到降低这些部位结渣的可能性 ,此外还可以降低高温烟气对前后墙 (即水冷壁 )的冲刷 ,有效防止或降低水冷壁的高温腐蚀 .
Cold model research was carried out on the introduction of 36MW W-type flame boiler from Luohuang Power Plant in Stein, France.The flow field in the furnace was tested by hot wire anemometer, and the effect of furnace throat area on furnace aerodynamic Field and the law of the field, the airflow field in the furnace with different relative throat area is obtained, and the airflow velocity distribution, airflow fullness and average effective momentum flow rate in the furnace are compared and analyzed.The results show that, Proper reduction of the furnace throat area, on the one hand, is conducive to the injection of coal combustion and burnout on the other hand, is conducive to reducing the high temperature flue gas on the throat and front and rear arches and cold gray bucket impact, so as to achieve Reduce the possibility of slagging in these areas, in addition to reduce the erosion of high temperature flue gas on the front and rear walls (ie, water wall), effectively prevent or reduce the high temperature corrosion of water wall.