Fluid dynamic optimization of SCR plants by modeling demonstrated by the SCR plant Logan Generating Plant
- Siemens AG, Power Generation KWU, Erlangen (Germany)
The SCR process for the reduction of nitrogen oxides has proven itself in practical application in many fossil-fired power stations. The concept of integrating a high-dust SCR plant between the boiler and air preheater has often been hampered by structural constraints. As a result of the limited space available, the plant`s ducting will have in most cases a high degree of complexity. In order to achieve efficient SCR plant functioning, however, the flow conditions have to be analyzed in detail and to be optimized. The goal is to obtain uniform flow distribution upstream of the catalysts and a homogeneous distribution of the reducing agent ammonia, while incurring as small a pressure drop as possible. To this end, fluid dynamic measures are implemented such as the installation of guide vanes and static mixing systems. This paper describes the procedure used to meet the requirements mentioned above. It enables the changes and modifications to be developed efficiently in terms of time and cost. Experience shows that the results obtained can indeed be transferred to and confirmed in a full-scale plant. The fluid dynamic solutions derived by modeling and the adaptation of a static mixer to the geometry of the flue gas ducting are demonstrated using the example of the SCR plant at the Logan Generating Plant operated by US Generating Company. The results of the measurements are presented to illustrate the mechanisms of the modifications.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
- OSTI ID:
- 374523
- Report Number(s):
- EPRI-TR-105978-V3; CONF-9505150-Vol.3; TRN: 96:004683-0014
- Resource Relation:
- Conference: EPRI/EPA joint symposium on stationary combustion NO/sub x/ control, Kansas City, MO (United States), 16-19 May 1995; Other Information: PBD: Jan 1996; Related Information: Is Part Of Proceedings: EPRI/EPA 1995 joint symposium on stationary combustion NO{sub x} control: Volume 3, Thursday, May 18, 1995, Sessions 6A, 7A, 7B; PB: 476 p.
- Country of Publication:
- United States
- Language:
- English
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