Rotary regenerative heat exchanger: Application to atmospheric fluidized-bed combustion boilers
- ABB Air Preheater, Inc., Wellsville, NY (United States)
- Kraftanlagen Abgastechnik GmbH, Bammental (Germany)
- GEC Alsthom-Stein Industrie, Lys-Lez-Lannoy (France)
- ABB Gradelius K.K., Kobe (Japan)
The application of the Ljungstrom{reg_sign} air preheater, a rotary regenerative type, to atmospheric fluidized-bed combustion (AFBC) bubbling-bed and circulating-bed boilers is summarized. The air preheater is used to recover useful heat from the boiler exhaust gas and return it to the incoming combustion air. This provides a more efficient combustion process. Tubular and regenerative air preheaters are key accessories being used on AFBC boilers throughout the world. Descriptions in this paper will cover nine units in operation or planned. The projects include: USA`s Northern States Power Company`s 130 MWe Black Dog No. 2; TVA`s 160 MWe Shawnee No. 10; Japan`s Electric Power Development Company`s 1,115 t/hr, Takehara Power Station No. 2; Finland`s 360 t/hr, Kainuum Voima Unit; Germany`s Go-Werk Unit at 400 t/hr, Go-Werk Unit at 290 t/hr; France`s 125 MWe E. Huchet Power Station and 250 MWe Provence Power Station. This paper will cover key selection and design features, some operating history, and successful modifications for improved AFBC performance. Design features reviewed are designs developed to control leakage at acceptable levels, cleaning devices and routines to maintain a clean heat transfer surface for satisfactory thermal performance and pressure drop, and maintenance experiences. This summary of experience, based on cooperative efforts with customers, shows availability of the Ljungstrom rotary regenerative heat exchanger on AFBC boilers is similar to that on pulverized coal-fired boilers.
- OSTI ID:
- 245031
- Report Number(s):
- CONF-950522-; ISBN 0-7918-1305-3; TRN: IM9627%%397
- Resource Relation:
- Conference: 13. international conference on fluidized-bed combustion, Orlando, FL (United States), 7-10 May 1995; Other Information: PBD: 1995; Related Information: Is Part Of 13. international conference on fluidized bed combustion: Proceedings. Volume 1; Heinschel, K.J. [ed.] [Air Products and Chemicals, Inc., Allentown, PA (United States)]; PB: 719 p.
- Country of Publication:
- United States
- Language:
- English
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