GE Rich-Quench-Lean贫燃燃气轮机燃烧器,Journal of Engineering for Gas Turbines and Power

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GE Rich-Quench-Lean贫燃燃气轮机燃烧器
Journal of Engineering for Gas Turbines and Power Pub Date : 1998-07-01 , DOI: 10.1115/1.2818173
A. S. Feitelberg ₁ , M. A. Lacey ₁

Affiliation

通用电气公司已经开发并成功测试了全尺寸F级（燃烧室出口温度为2550°F），贫油-贫油（RQL）燃气轮机燃烧室，命名为RQL2，用于低热值（LHV）燃料和整体气化联合循环应用。尽管这项工作的主要目的是开发一种RQL燃烧器，其燃料结合的氮向NOx的转化率比传统的燃气轮机燃烧器要低，但RQL2的设计可以很容易地适应天然气和液体燃料的燃烧。RQL2是一项为期5年研发工作的结晶，始于2直径穿孔板式燃烧器的天然气测试，其中包括RQL1（缩小规模（6直径）的燃气轮机燃烧器）的LHV燃料测试。RQL2燃烧器包括一个14直径的会聚富油级衬套，撞击冷却的直径为7的径向分层淬火阶段，以及在直径为10'的薄膜冷却的贫油阶段的入口处的向后台阶。富燃燃烧室衬套具有新颖的双壁结构，具有狭窄的圆周冷却通道，可将金属壁温保持在设计极限内。作出规定以允许独立控制供应到浓和急冷/稀阶段的空气。RQL2用中试规模的煤气化和高温脱硫系统提供的LHV燃料燃烧了将近100个小时。在最佳富油阶段，NO x排放量约为50 ppmv（以干燥的15％O 2为基准），比燃烧相同燃料的传统扩散火焰燃烧器所预期的低3倍以上。在LHV燃料中含有4600 ppmv NH 3时，这相当于NH 3转化为NO x约5％。随着条件偏离最佳状态，RQL2 NOx排放逐渐增加，直到可以与标准燃烧室相媲美。RQL2的化学动力学模型由一系列理想的化学反应器构建而成，与测得的NOx排放相当吻合。在所有条件下，CO排放量在5至30 ppmv之间（以干燥的15％O 2为基准）。

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The GE Rich-Quench-Lean Gas Turbine Combustor

The General Electric Company has developed and successfully tested a full-scale, F-class (2550°F combustor exit temperature), rich-quench-lean (RQL) gas turbine combustor, designated RQL2, for low heating value (LHV) fuel and integrated gasification combined cycle applications. Although the primary objective of this effort was to develop an RQL combustor with lower conversion of fuel bound nitrogen to NO x than a conventional gas turbine combustor, the RQL2 design can be readily adapted to natural gas and liquid fuel combustion. RQL2 is the culmination of a 5 year research and development effort that began with natural gas tests of a 2 diameter perforated plate combustor and included LHV fuel tests of RQL1, a reduced scale (6 diameter) gas turbine combustor. The RQL2 combustor includes a 14 diameter converging rich stage liner, an impingement cooled 7 diameter radially-stratified-quench stage, and a backward facing step at the entrance to a 10' diameter film cooled lean stage. The rich stage combustor liner has a novel double-walled structure with narrow circumferential cooling channels to maintain metal wall temperatures within design limits. Provisions were made to allow independent control of the air supplied to the rich and quench/lean stages. RQL2 has been fired for almost 100 hours with LHV fuel supplied by a pilot scale coal gasification and high temperature desulfurization system. At the optimum rich stage equivalence ratio NO x emissions were about 50 ppmv (on a dry, 15 percent O 2 basis), more than a factor of 3 lower than expected from a conventional diffusion flame combustor burning the same fuel. With 4600 ppmv NH 3 in the LHV fuel, this corresponds to a conversion of NH 3 to NO x ofabout 5 percent. As conditions were shifted away from the optimum, RQL2 NO x emissions gradually increased until they were comparable to a standard combustor. A chemical kinetic model ofRQL2, constructed from a series of ideal chemical reactors, matched the measured NO x emissions fairly well. The CO emissions were between 5 and 30 ppmv (on a dry, 15 percent O 2 basis) under all conditions.

更新日期：1998-07-01

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