New Technology for Control of N2O Emissions from Fluid Bed Combustors

流化床燃烧器 N2O 排放控制新技术

• 批准号: 9261121
• 负责人: Richard Lyon
• 金额: $ 5万
• 依托单位: Energy and Environmental Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-01 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9261121&HistoricalAwards=false
• 关键词: New; Technology; Control; N2O; Emissions

This program is aimed at development of a novel method of controlling N2O emissions from fluidized bed coal combustors, involving injection of sodium vapor at very low levels into the flue gas leaving the fluidized bed. The objectives of the Phase I effort are: (1) Demonstrate that sodium injection can cause substantially complete decomposition of N2O at conditions relevant to coal-fired fluid bed combustors; (2) Obtain chemical kinetic data for comparison with predictions of kinetic calculations; and, (3) Complete that comparison. Laboratory experiments will be carried out in a system consisting of four subsystems, a system for blending fixed gases and vaporized liquids, a sodium vaporizer, a reactor, and an analytical train. The reactor to be employed consists of a quartz tube into which a length of steel tubing projects, with the main flow gas going through the resulting annular space and the nitrogen-sodium mixture through the steel tubing. The analytical system will be centered around an NDIR instrument for N2O, with the analytical train also including a CO analyzer, a Pulsed Fluorescent SO2 analyzer, and a Chemiluminescent NOx analyzer. Successful completion of the Phase I studies will provide a lab-scale demonstration of the process and provide a clear understanding of the chemistry involved. Considerable effort has been expended on development of fluid bed combustion technology for burning of coal with low SOx and NOx emissions. Unfortunately, this technology approach leads to production of copious amounts of N2O emissions, an unacceptably serious drawback since N2O is both a greenhouse gas and a major contributor to depletion of the ozone layer. Accordingly, development of a means of dealing with this problem is of major importance to the viability of fluidized bed combustors for burning of coal.

该计划旨在开发一种新的方法， 控制流化床煤燃烧器的N2 O排放， 包括将钠蒸气以非常低的水平注入到 烟道气离开流化床。 的目标 第一阶段的工作是：（1）证明钠注射液可以 使N2 O基本上完全分解， 与燃煤流化床燃烧器有关的条件;（2） 获得化学动力学数据，与预测值进行比较 动力学计算;（3）完成比较。 实验室实验将在一个系统中进行 由四个子系统组成，一个系统用于混合固定 气体和蒸发的液体，钠蒸发器，反应器， 和分析列车。 使用的反应器包括： 一段钢管伸入其中的石英管， 其中主流气体通过所形成的环形通道 空间和氮钠混合物通过钢 油管 分析系统将围绕一个Nemos N2 O分析仪，分析系统还包括 CO分析仪、脉冲荧光SO2分析仪和 化学发光氮氧化物分析仪 成功完成 第一阶段研究将提供一个实验室规模的示范， 过程并提供对化学的清晰理解 涉案 在开发流体方面已经花费了相当大的努力 一种低硫燃煤的床层燃烧技术， 氮氧化物排放。 不幸的是，这种技术方法导致 产生大量的N2 O排放， 由于N2 O既是温室气体， 是臭氧层破坏的主要因素。 因此，发展一种处理这一问题的手段， 这个问题对流化床的可行性至关重要。 用于燃烧煤的床燃烧器。