Reducing the moisture content of clean coals: Volume 1, Pressure filter with air-drying cycle
This report contains the results of an EPRI investigation into the performance of a new type of pressure filter when dewatering fine clean coal. Tests were designed so that equations predicting filter performance could be developed. The tests also provided data for an economic comparison between the pressure filter with air-drying cycle and a conventional thermal dryer. For 100M /times/ 0 clean coal, this pressure filter produced cake with a surface moisture content of less than 14 percent and a clear effluent that can be reused as process water. This moisture is approximately 15 percent lower than that produced by conventional mechanical dewatering equipment for the same size feed. Economic analysis shows the pressure filter saves 5/cents//MBtu or $5.5 million per year for a new cleaning plant producing five million tons per year of clean coal. Even when an existing five million tons per year cleaning plant with thermal dryers is retrofitted with this pressure filter, cost savings are still significant: 2/cents//MBtu. 12 refs., 24 figs., 20 tabs.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (USA); Kaiser (Raymond) Engineers, Inc., Homer City, PA (USA). Homer City Office; Science Applications International Corp., Homer City, PA (USA)
- OSTI ID:
- 7177356
- Report Number(s):
- EPRI-CS-5869-Vol.1; ON: TI89000256
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
CARBONACEOUS MATERIALS
CLEANING
COAL
COAL PREPARATION
COMBUSTION PROPERTIES
CONCENTRATORS
COST BENEFIT ANALYSIS
DEWATERING EQUIPMENT
DOCUMENT TYPES
ECONOMICS
ENERGY SOURCES
FILTERS
FLUIDS
FOSSIL FUELS
FUELS
GASES
MATERIALS
MOISTURE
PERFORMANCE
PROGRESS REPORT
VAPORS
WATER VAPOR