Engineering design and analysis of advanced physical fine coal cleaning technologies. Quarterly technical progress report No. 11, April--June 1992
The changes made to the Coal Cleaning Simulator during this period were mostly aimed at correcting problems found during the flowsheet validations. one modification was made to the washability interpolation. Prior to interpolation, the feed size distribution is preprocessed by a subroutine which resets the size intervals. That subroutine was changed to ensure that standard screen sizes be used for the size intervals, with only the topsize being the actual user specified size limit. This should prevent problems such as the size range being much wider than that provided by the user (previously, this subroutine would add fine size intervals to the input size range, in some cases). Another change made was the modification of the heavy media cyclone water balance algorithm. Because of the internal calculations of both the amount of media and makeup water required, the water balance was not being made correctly in the case where a feed that was too dilute. The report writer for this model was also modified in order to correctly label the material balances reported. Other changes made were the addition of fifteen coals to the Coal Property Databank, and the referencing of utilities in the screen cost models for operating cost calculations. Finally, a number of problems had been reported for CCS cost models. These were related to discrepancies between UOS block sizing calculations and cost block sizing calculations, and utilities (horsepower requirement) calculations. The corrections were applied to the latest CCS version.
- Research Organization:
- Aspen Technology, Inc., Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-89PC89908
- OSTI ID:
- 10178237
- Report Number(s):
- DOE/PC/89908-T22; ON: DE92040661
- Resource Relation:
- Other Information: PBD: 20 Jul 1992
- Country of Publication:
- United States
- Language:
- English
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