Application of Exhaust Gas Recirculation in a DLN F-Class Combustion System for Postcombustion Carbon Capture
Application of Exhaust Gas Recirculation in a DLN F-Class Combustion System for Postcombustion Carbon Capture
复制标题
废气再循环在DLN F级燃烧系统中燃烧后碳捕获的应用
DOI：
10.1115/1.2982158
复制
发表时间：
2009
影响因子：
1.5
通讯作者：
Arne Lynghjem
中科院分区：
文献类型：
--
作者：
A. Elkady;A. Evulet;A. Brand;Tord Peter Ursin;Arne Lynghjem
本文描述了通用电气全球研究中心开展的实验工作，以评估在废气再循环(EGR)条件下使用干式低NOx(DLN)技术的性能和风险。废气再循环被认为是一种可行的技术，可以在减少燃烧后分离装置体积的同时提高烟道气中的二氧化碳浓度，从而显著降低二氧化碳捕获成本。为了研究低氧环境下喷管在典型压力和温度下的工作性能，研制了一种研究燃烧室。在可视试验台上进行了一系列实验，在燃气轮机的压力和温度下，使用惰性气体(如氮气/二氧化碳)将新鲜空气净化到循环模型所确定的水平。此外，本文还讨论了在通用电气F级重型燃气轮机上使用DLN喷管进行的实验工作。在部分预混模式下运行的研究型燃烧室的实验结果包括，在高达40%的废气再循环条件下，废气再循环对可操作性、效率和排放性能的影响。使用DLN单喷嘴燃烧室在完全预混模式下进行的实验表明，在保持CO排放的同时，可以进一步降低NOx。虽然大多数现有的研究集中在与燃烧室出口最低氧气浓度(MOC)有关的限制上，但我们报告了氧化剂中二氧化碳水平的重要性。这一限制与MOC一样重要，它随压力和烧成温度的不同而变化。
This paper describes experimental work performed at General Electric, Global Research Center to evaluate the performance and understand the risks of using dry low NO x (DLN) technologies in exhaust gas recirculation (EGR) conditions. Exhaust gas recirculation is viewed as an enabling technology for increasing the CO 2 concentration of the flue gas while decreasing the volume of the postcombustion separation plant and therefore allowing a significant reduction in CO 2 capture cost. A research combustor was developed for exploring the performance of nozzles operating in low O 2 environment at representative pressures and temperatures. A series of experiments in a visually accessible test rig have been performed at gas turbine pressures and temperatures, in which inert gases such as N 2 /CO 2 were used to vitiate the fresh air to the levels determined by cycle models. Moreover, the paper discusses experimental work performed using a DLN nozzle used in GE's F-class heavy-duty gas turbines. Experimental results using a research combustor operating in a partially premixed mode include the effect of EGR on operability, efficiency, and emission performance under conditions of up to 40% EGR. Experiments performed in a fully premixed mode using a DLN single nozzle combustor revealed that further reductions in NO x could be achieved while at the same time still complying with CO emissions. While most existing studies concentrate on limitations related to the minimum oxygen concentration (MOC) at the combustor exit, we report the importance of CO 2 levels in the oxidizer. This limitation is as important as the MOC, and it varies with the pressure and firing temperatures.