Full Scale Testing of a Cluster Nozzle Burner for the Advanced Humid Air Turbine
Full Scale Testing of a Cluster Nozzle Burner for the Advanced Humid Air Turbine
复制标题
先进湿空气涡轮机集束喷嘴燃烧器的全面测试
DOI：
10.1115/gt2007-27737
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
H. Inoue
中科院分区：
文献类型：
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作者：
T. Koganezawa;Keisuke Miura;Takeo Saito;K. Abe;H. Inoue
先进的湿空气透平(AHAT)系统具有加湿器和热回收系统的优点，可以在不需要极高的点火温度和压力比的情况下提高燃气轮机发电的热效率。已研制出适合AHAT系统的中试装置和燃气轮机样机。在中试试验之前，利用燃烧试验台进行了试验研究，以获得原型燃烧室的特性，本文对此进行了描述。AHAT系统的燃烧条件同时具有高湿度和高温空气(17.6wt%，629℃)的特点。预计高湿度条件下的低火焰温度将减少NOx的排放，而高温空气条件下将保持火焰的稳定性。然而，后一种情况的缺点是会导致NOx排放和燃料自燃。先前提出了一种集束喷嘴燃烧器结构，该结构具有多个燃料和空气同轴射流。集束喷嘴燃烧器可以在短时间内有效地混合燃料和空气，这使得它适合于AHAT系统，并能够同时解决火焰稳定性和NOx降低问题。燃烧台架试验结果表明，所研制的集束喷嘴燃烧器具有良好的燃烧性能。AHAT系统的高温条件和中心燃烧器空气旋转产生的回流区都使火焰稳定在足以使喷嘴燃烧器在AHAT运行的水平。高湿度条件下的低火焰温度对降低NOx排放是有效的，在50%-100%的负荷下，NOx排放低于10ppm。版权所有©2007，ASME
The advanced humid air turbine (AHAT) system, which has a humidifier and a heat recovery system has the advantage of improving the thermal efficiency of gas turbine power generation without needing an extremely high firing temperature and pressure ratio. A pilot plant and a prototype gas turbine adapted to the AHAT system have been developed. Before the pilot plant test, an experimental study using a combustion test rig was carried out to obtain the characteristics of a prototype combustor and it is described in this presentation. The combustion conditions in the AHAT system are characterized by both high humidity and high temperature air (17.6wt%, 629C). It is expected that a low flame temperature caused by the high humidity condition will decrease NOx emission while the high temperature air condition will sustain flame stability. However, the latter condition has the disadvantage of causing NOx emission and autoignition of fuel. A cluster nozzle burner configuration, which has many fuel and air coaxial jet streams, was previously proposed. The cluster nozzle burner can mix fuel and air effectively within a short time which makes it suited to the AHAT system and able to cope with both flame stability and NOx reduction problems. The combustion rig test results showed good combustion performance for the developed cluster nozzle burner. Both the high temperature condition of the AHAT system and the recirculation zone generated by swirling of center burner air sustained flame stability at a level sufficient for the nozzle burner in AHAT operation. The low flame temperature due to the high humidity condition was effective in decreasing NOx emission, which was less than 10ppm at 50-100% load.Copyright © 2007 by ASME