A novel coal feeder for production of low sulfur fuel. Quarterly technical progress report, April 1--June 30, 1992
In this project, a dual-screw feeder was designed and constructed for desulfurization of coal before combustion. The key parts of this reactor are two screw tubes which are used to feed coal and calcined lime particles separately, the inner tube acting as a coal pyrolyzer and the outer tube acting as a desulfurizer with hot calcined lime pellets or other renewable sorbent pellets. The objective of this project is to study the feasibility of an advanced concept of desulfurization using the coal feeder. In this quarter, the following tasks have been performed: (1) Continued measurements of the organic sulfur content in the char which was produced from the pyrolysis process in the coal feeder, (2) Study of the combustion characteristics of the pyrolyzed products by using a combustor which is physically attached to the feeder system. Some preliminary conclusions have been obtained: (1) Under the experimental conditions, the organic sulfur in Ohio No.8 coal is released in the form of H{sub 2}S and 73.1% of the organic sulfur was removed in the dual-screw feeder reactor at a temperature of 475{degrees}C with the residence time of 6 min. (2) The SO{sub 2} emission from the combustor stack reduces as the coal feeder temperature rises, corresponding to the level of H{sub 2}S release from the dual-screw feeder.
- Research Organization:
- Cincinnati Univ., OH (United States). Coll. of Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-89PC89781
- OSTI ID:
- 10178582
- Report Number(s):
- DOE/PC/89781-11; ON: DE92040445
- Resource Relation:
- Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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A novel coal feeder for production of low sulfur fuel
A novel coal feeder for production of low sulfur fuel. Quarterly technical progress report, January 1, 1992--April 1, 1992