9FA燃气轮机目前大部分使用的是DLN2.0燃烧系统,由于其燃烧模式和控制系统的原因造成运行过程中瞬时出现烟气的氮氧化物排放浓度超出国家环保局制定的排放标准;另外由于在燃烧模式切换的过程中和极端天气下,由于燃烧脉动或其他不确定因...9FA燃气轮机目前大部分使用的是DLN2.0燃烧系统,由于其燃烧模式和控制系统的原因造成运行过程中瞬时出现烟气的氮氧化物排放浓度超出国家环保局制定的排放标准;另外由于在燃烧模式切换的过程中和极端天气下,由于燃烧脉动或其他不确定因素,导致出现燃烧室损坏的问题,增加了运行风险和检修成本。本文通过对9FA燃气轮机排放烟气的氨氧化物浓度高产生的原因、燃烧脉动升高的原因以及最新的DLN2.6+燃烧器和Op Flex Auto Tune自动燃烧调整系统的工作原理,分析其环保经济效益。展开更多
Combined with the use of renewable energy sources for its production,hydrogen represents a possible alternative gas turbine fuel within future low emission power generation.Due to the large difference in the physical ...Combined with the use of renewable energy sources for its production,hydrogen represents a possible alternative gas turbine fuel within future low emission power generation.Due to the large difference in the physical properties of hydrogen compared to other fuels such as natural gas,well established gas turbine combustion systems cannot be directly applied for dry-low-NO_(x)(DLN)hydrogen combustion.Thus,the development of DLN combustion technologies is an essential and challenging task for the future of hydrogen fuelled gas turbines.The DLN micromix combustion principle for hydrogen fuel has been developed to significantly reduce NO_(x) emissions.This combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type flames.The major advantages of this combustion principle are the inherent safety against flash-back and the low NO_(x) emissions due to a very short residence time of reactants in the flame region of the micro-flames.The micromix combustion technology has been already proven experimentally and numerically for pure hydrogen fuel operation at different energy density levels.The aim of the present study is to apply and compare different combustion models for the characterization of the micromix flame structure,its interaction with the flow field and its NO_(x) emissions.The study reveals great potential for the successful application of numerical flow simulation to predict flame structure and NO_(x) emission level of micromix hydrogen combustion,help understanding the flow phenomena related with the micromixing,reaction zone and NO_(x) formation and support further optimization of the burner performance.展开更多
文摘9FA燃气轮机目前大部分使用的是DLN2.0燃烧系统,由于其燃烧模式和控制系统的原因造成运行过程中瞬时出现烟气的氮氧化物排放浓度超出国家环保局制定的排放标准;另外由于在燃烧模式切换的过程中和极端天气下,由于燃烧脉动或其他不确定因素,导致出现燃烧室损坏的问题,增加了运行风险和检修成本。本文通过对9FA燃气轮机排放烟气的氨氧化物浓度高产生的原因、燃烧脉动升高的原因以及最新的DLN2.6+燃烧器和Op Flex Auto Tune自动燃烧调整系统的工作原理,分析其环保经济效益。
文摘Combined with the use of renewable energy sources for its production,hydrogen represents a possible alternative gas turbine fuel within future low emission power generation.Due to the large difference in the physical properties of hydrogen compared to other fuels such as natural gas,well established gas turbine combustion systems cannot be directly applied for dry-low-NO_(x)(DLN)hydrogen combustion.Thus,the development of DLN combustion technologies is an essential and challenging task for the future of hydrogen fuelled gas turbines.The DLN micromix combustion principle for hydrogen fuel has been developed to significantly reduce NO_(x) emissions.This combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type flames.The major advantages of this combustion principle are the inherent safety against flash-back and the low NO_(x) emissions due to a very short residence time of reactants in the flame region of the micro-flames.The micromix combustion technology has been already proven experimentally and numerically for pure hydrogen fuel operation at different energy density levels.The aim of the present study is to apply and compare different combustion models for the characterization of the micromix flame structure,its interaction with the flow field and its NO_(x) emissions.The study reveals great potential for the successful application of numerical flow simulation to predict flame structure and NO_(x) emission level of micromix hydrogen combustion,help understanding the flow phenomena related with the micromixing,reaction zone and NO_(x) formation and support further optimization of the burner performance.