Reducing NO{sub x} while maintaining boiler performance at TVA`s Johnsonville steam plant using constrained sequential optimization
- United Energy Services Corp., New Johnsonville, TN (United States)
- Tennessee Valley Authority, Chattanooga, TN (United States)
- PowerMAX, Cincinnati, OH (United States)
The Tennessee Valley Authority (TVA) utilizes boiler tuning as an integral part of their compliance strategy to meet the requirements of the Clean Air Act Amendments of 1990. A desirable tuning solution should not only be effective for minimizing NOx emissions but also should offer opportunities for improved thermal performance leading to cost savings and a rapid return on investment. Guided by these objectives, TVA decided to apply the ULTRAMAX Method, which utilizes a new technology, co-developed by EPRI and Ultramax Corp., called sequential process optimization. This technology makes possible immediate reductions in NOx while constraining other emission and thermal performance parameters to avoid any adverse effects. The ULTRAMAX Method consists of a methodology and the supporting computer software that builds on existing boiler system knowledge and guides the operator through a sequence of control parameter adjustments to achieve ever-improving levels of performance. It is utilized during normal operations and can be applied to boiler systems of virtually any design. The software can be integrated with a data acquisition system to provide an operator advisory capability. This paper describes an application of sequential process optimization technology to six mid-sized, older-vintage coal-fired boilers. The optimization project took place from September through November 1994. The results were significant reductions of NOx from previously untuned baseline conditions at full load, with little more than two weeks of effort. In addition, heat rate and LOI reductions were achieved for some units.
- OSTI ID:
- 103722
- Report Number(s):
- CONF-950414-; TRN: IM9541%%161
- Resource Relation:
- Conference: 57. annual American power conference, Chicago, IL (United States), 18-20 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of American Power Conference: Proceedings. Volume 57-II; PB: 914 p.
- Country of Publication:
- United States
- Language:
- English
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