Co-firing coal and biomass waste in an FB boiler
The CSIR has been involved in the field of FBC since 1976, when a small 0.25m{sup 2} test facility was erected. Work really began in earnest in 1984, when the National Fluidised Bed Combustion (NFBC) boiler was commissioned. This facility, situated at the CSIR`s pilot plant terrain in Pretoria West, was designed to produce 12 tph steam while utilising {open_quotes}waste{close_quotes} coal reserves are large, accounting for some 11% of the worlds reserves. Unfortunately the quality of the coal is comparatively poor, and beneficiation is required in order to produce an acceptable fuel for the local and international markets. This leads to a large production of {open_quotes}waste{close_quotes} coal. More detail is given. It was concern about this waste that prompted the Department of Mineral and Energy Affairs (DMEA) to fund the construction of the NFBC boiler, the purpose of which was to prove the ability of FBC technology to utilize the low quality discard coal. The running costs of the unit were at first provided by the DMEA, and later by the National Energy Council (NEC). The NEC also played an active role in the formulation of test campaigns on the boiler. Management of the NFBC was undertaken by the division of Energy Technology (Enertek) at the CSIR in Pretoria, and it was sited at the CSIR`s pilot plant facility in Pretoria West. The boiler has been running since 1984 and many thousands of tonnes of low-grade coal have been burnt in it. During the course of the test campaign on the NFBC the CSIR developed a great deal of experience in the field of FBC, and in particular use of low grade fuels in FBC equipment. The following paper describes the highlights of this test work and details the commercial plant which have since been built using CSIR technology.
- Research Organization:
- Coal and Slurry Technology Association, Washington, DC (United States); USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
- OSTI ID:
- 171610
- Report Number(s):
- CONF-950313-; ON: TI96120242; TRN: 95:007972-0040
- Resource Relation:
- Conference: 20. international technical conference on coal utilization and fuels systems, Clearwater, FL (United States), 20-23 Mar 1995; Other Information: PBD: 1995; Related Information: Is Part Of Coal utilization and fuel systems: Proceedings; PB: 780 p.
- Country of Publication:
- United States
- Language:
- English
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