Gas Turbine NOx Emissions Approaching Zero – Is it Worth the Price?
Gas Turbine NOx Emissions Approaching Zero – Is it Worth the Price?
复制标题
燃气轮机氮氧化物排放接近零——值得付出代价吗？
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Manager Joel Chalfin
中科院分区：
文献类型：
--
作者：
Consulting Engineer Marvin M. Schorr;Manager Joel Chalfin
燃气轮机满足更低NOx排放水平的要求源于在能够实现个位数NOx的燃烧系统存在之前开发的监管方法。用于GE Frame 7FA、7EA和6B的干式低NOx（DLN）燃烧室现在显示出9 ppm NOx。本文比较了需要附加排放控制以实现较低水平的NOx与已经能够实现个位数NOx的燃气涡轮机燃烧系统的能量、环境和经济影响。得出的结论是，当燃气涡轮机燃烧系统能够实现个位数的NOx时，通过使用附加排放控制将NOx逐步降低到越来越低的水平达到了收益递减点。为实现较低的NOx水平而进行的附加排放控制的成本变得过高，热耗率增加，总体环境影响实际上恶化。建议美国环境保护局修改监管程序，允许许可当局考虑冲突的环境，能源和经济影响，在非达标地区，因为他们现在可以在达标地区，在附加排放控制的情况下，将导致只有一个小的减少排放量。
The requirement for gas turbines to meet ever lower NOx emission levels results from a regulatory approach developed before combustion systems existed that are capable of achieving single digit NOx. Dry low NOx (DLN) combustors for GE Frame 7FAs, 7EAs and 6Bs are now demonstrating 9 ppm NOx. This paper compares the energy, environmental and economic impacts of requiring add-on emission controls to achieve a lower level of NOx, with a gas turbine combustion system that is already capable of achieving single digit NOx. The conclusion reached is that ratcheting NOx down to lower and lower levels through the use of add-on emission controls reaches the point of diminishing return when the gas turbine combustion system is capable of achieving single digit NOx. The cost of add-on emission controls to achieve a lower NOx level becomes excessive, the heat rate increases and the overall environmental impacts are actually worsened. The recommendation is made for the U.S. EPA to amend the regulatory process to allow permit authorities to consider conflicting environmental, energy and economic impacts in nonattainment areas, as they now can in attainment areas, in cases where add-on emission controls will result in only a small reduction in emissions.