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摆动式燃烧器的试验研究 总被引:3,自引:0,他引:3
本文介绍了摆动式燃烧器短喷嘴结构冷态模拟试验结果,以及中间工业试验和热态运行试验结果。研究了短喷嘴的气流特性、摆动燃烧对锅炉汽温的影响。以及摆动式燃烧器本身运行的特点与可靠性。同时对短喷嘴摆动式燃烧器的某些结构设计提出了建议。 相似文献
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1025t/b控制循环锅炉采用燃烧器喷嘴摆动调节过热蒸汽和再热蒸汽温度。锅炉投运后曾经发生燃烧器喷嘴摆动装置故障,不起调温作用,汽轮机高压缸排汽温度比设计值高10~20℃,被迫采取各用事故喷水调节再热蒸汽温度。锅炉再热器受热面偏大;使再热器减温水量比设计值多20-30tt/h,明显影响机组运行经济性。通过调查研究和实炉试验,对摆动机构采取改进措施。现在燃烧器喷嘴已能正常摆动,找到了减少再热器减温水量的途径。 相似文献
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主要论述摆动式燃烧器在制造中出现的摆动角度不到位、不灵活和卡死等疑难问题,并详细分析造成此问题产生的具体原因,同时制定工艺方案,提出工艺改进,采取相应措施,彻底消除由于摆动角度不灵活造成的返修浪费、影响交货期等情况,确保在不影响生产周期且节约制造费用的前提下,使其性能、质量得以充分保证,对摆动式燃烧器的进一步开发具有一定的意义。 相似文献
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通过锅炉燃烧器具体试验,分析证明了燃烧器顶部布置反向OFA是一种有效减少四角切圆燃烧残余旋转引起的烟温偏差的方法。 相似文献
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再热汽温控制始终是火电厂运行控制的难点,减少再热器减温水的用量对提高机组的热经济性有十分重要的意义。文中采用燃烧器摆角和再热器喷水减温联合调整再热汽温的控制策略,其中燃烧器摆角调节控制器采用内模控制器IMC以提高其控制性能。在某电厂300MW机组上进行再热汽温优化控制系统试验,试验结果表明IMC内模控制器更好地解决大时滞问题,联合控制策略可极大地降低减温水投放量。 相似文献
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《International Journal of Hydrogen Energy》2022,47(64):27703-27715
This study presents the idea of heat recovery through recirculating walls to enhance the combustion stability for ultra-low calorific gas in a porous burner. Numerical studies on the combustion of ultra-low calorific gas of CO/H2 with CO2 and N2 in a developed divergent porous burner with annular channel is conducted using two-dimensional axis symmetrical model with detailed kinetics. The heat recovery efficiency is defined as the ratio of heat recovery by the fresh mixture in the annular channel to burner power. It is shown that the heat recovery has significant effect on the minimal inlet gas temperature (MIGT) for stable combustion. It is confirmed that the heat recovery enhances the combustion and the stability limits are enlarged by preheating the fresh mixture, but it also leads to an extra pressure loss across the burner compared to that without heat recovery. Results show that heat recovery efficiency reaches up to 0.18 for all the investigated parameters and it reduces linearly from 0.32 to 0.18 as the mass flow ratio increases from 0.8 to 1.5. The MIGT for the burner with heat recirculating channel is always smaller than that without heat recovery. As a result, the combustion is greatly improved by the heat recovery in the divergent burner. Meanwhile, it is shown that pressure loss is increased significantly when the heat recirculating annular channel is added. 相似文献
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