Development issues for the char combustor component of an integrated partial gasification combined cycle system
- British Coal Corp., Cheltenham (United Kingdom). Coal Technology Development Division
- Univ. of British Columbia, Vancouver, British Columbia (Canada). Dept. of Chemical Engineering
The Air Blown Gasification Cycle (ABGC), formerly known as the Topping Cycle, is an integrated partial gasification combined cycle system which offers potential advantages over other advanced coal-fired processes under development. Within the United Kingdom a development program is underway to develop the components of the ABGC leading to the establishment of demonstration and commercial units. The ABGC comprises an air blown partial gasifier which produces a fuel gas and a char residue. The gas after cooling and cleaning is fired in a gas turbine, while the char is burned in a CFBC to raise steam for the steam cycle. There are several char combustor component development issues which are under investigation at British Coal. The objective of this work is to produce combustion performance and emissions data for what is an unusual fuel having a very low volatile matter content, a bimodal size distribution and containing CaS which needs to be fully converted to CaSO{sub 4} before disposal. The R and D program has involved test work on the 0.12MWth CFBC test facility at the University of British Colombia (UBC) and the construction and extended operation of a 1.8MWth CFBC test facility at British Coal. In support of the CFBC test runs laboratory studies are being undertaken on the CaS oxidation reaction and a cold model of the British Coal CFBC test facility has been constructed to assist in scale up of the test facility data. Preliminary test work carried out at UBC is described. It showed that the British Coal gasifier residues can be successfully burned in a CFBC environment with the minimum generation of environmentally contentious species, giving a combustion efficiency of 99%, and a sulphur retention efficiency of 96% with a calcium to sulphur ratio of 2:1. Indications for the special requirements for the design of the CFBC for use in an ABGC plant are discussed.
- OSTI ID:
- 244995
- Report Number(s):
- CONF-950522-; ISBN 0-7918-1305-3; TRN: IM9627%%361
- 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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