SBIR Phase I: Innovative Reburning Technique for Deep NOx Control

* 96-60084 Zamansky 有前景的固定式燃烧后NOx控制技术包括：选择性非催化还原（SNCR）、选择性催化还原（SCR）和再燃。SNCR和SCR通过与氮剂（氨或尿素）的非催化或催化反应来减少NOX。SCR存在几个问题，例如高资本成本、有限的催化剂寿命、催化剂中毒和处置。SNCR较便宜，但SNCR的能力受到NOX控制的窄温度窗口、氨泄漏、氮剂利用率低以及尿素喷射形成N2 O的限制。常规天然气再燃是目前较为成熟的NOx控制技术。再燃已成功地证明了在全面的EER和其他人在许多场合。然而，再燃烧单独提供约60%的NOx减少，并且在某些地理区域不能达到臭氧达到法规所要求的80%。拟议项目旨在通过在特定条件下向再燃区注入空气来改善再燃过程的性能。该项目的目标是通过空气促进再燃（阿普）工艺实现80%的NOx去除。与其他廉价的NOx控制方法（如低NOx燃烧器和SNCR）相结合，APR工艺将使NOx减少90%以上。 ***

*** 96-60084 Zamansky Prospective technologies for stationary post-combustion NOX control include: Selective NonCatalytic Reduction (SNCR), Selective Catalytic Reduction (SCR), and reburning. SNCR and SCR reduce NOX by non-catalytic or catalytic reactions with N-agents (ammonia or urea). There are several problems with SCR, such as high capital cost, limited catalyst life, catalyst poisoning and disposal. SNCR is less expensive, but capabilities of SNCR are limited by the narrow temperature window of NOX control, ammonia slip, low utilization of N-agents, and formation of N2O with urea injection. Conventional natural gas reburning is currently a mature technology for NOX control. Reburning has been successfully demonstrated at full scale by EER and others on numerous occasions. However, reburning alone provides about 60% NOz reduction and cannot achieve 80% required by ozone attainment regulations in certain geographic areas. The proposed project is directed towards improving performance of the reburning process by injection of air in the reburning zone under specific conditions. The goal of the project is to achieve 80% NOX removal by the Air Promoted Reburning (ARP) process. In a combination with other inexpensive NOX control methods (such as low NOz burners and SNCR), the APR process will make it possible to reduce NOX by 90+%. ***