Combustion of fuel with high fines in Ahlstrom Pyroflow{reg_sign} CFB boilers
- Pyropower Corp., San Diego, CA (United States)
Ahlstrom Pyroflow{reg_sign} boilers have demonstrated the ability of circulating fluidized bed (CFB) boilers to successfully burn unconventional fuels. These boilers have played a major role in the utilization of waste fuels, like bituminous gob and anthracite culm. Many of the waste fuels are processed prior to combustion to increase their heating value. As the technology for combustion of these fuels advanced, so has the desire of the owners to utilize more of the waste fuel and minimize the rejects. In the past, a majority of the fines content (less than 150 microns) was rejected and returned to the piles along with other rejects. In some cases, pond settlings were found to have a reasonably useful heat content, and were a preferred supplement to the anthracite culm. The use of these rejects had one result in common, i.e., to increase the fines content in the fuel feed to the CFB boilers. Pyropower was involved in tests conducted at two boilers, one burning bituminous gob and the other burning processed anthracite culm and silt. These tests were aimed at studying the effect of the high fuel fines content on the CFB boiler performance to determine the maximum practical fines limit. There were concerns of high unburned carbon loss, high CO and high cyclone temperatures. The actual test data confirmed that these boilers could fire a high percent of fines without major concerns. This paper discusses in detail the results of the testing with anthracite culm and silt, and references similar observations made during the testing with high fines bituminous gob.
- OSTI ID:
- 245043
- Report Number(s):
- CONF-950522-; ISBN 0-7918-1305-3; TRN: IM9627%%409
- 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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