Predicting the moisture content of coals dewatered by vacuum filters

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:257080

Arnold, B J ^[1]

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1. CQ Inc., Homer City, PA (United States)

Coal cleaning separations, both size- and gravity-based, rely on the use of water to make the process more efficient. Removal of water from the clean coal product reduces transportation costs, handling problems, and coal utilization problems. Coal cleaning refuse is also dewatered prior to disposal. The coal industry uses a wide range of equipment to dewater coal and refuse streams in cleaning plants, including thickeners, screens, filters, centrifuges, and thermal dryers. Aspen Technology Inc. developed the Coal Cleaning Simulator (CCS) running under ASPEN PLUS{trademark}. Simulator models for coal sizing, cleaning, and dewatering devices were developed by ICF Kaiser Engineers and CQ Inc., with assistance from The Pennsylvania State University. CQ Inc. and Penn State collaborated on the dewatering models. The CCS dewatering models predict the remaining free (surface) moisture of the cake, moisture which is potentially removal by mechanical means. By definition, the free moisture is the difference between total and equilibrium moisture. The equilibrium moisture is considered non-removable. One of the simpler dewatering models in the CCS is the vacuum-disk filter model. This paper highlights the calculation for moisture content in the product from this dewatering device.

• OSTI ID: 257080
• Report Number(s): CONF-950952--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ALGORITHMS
COAL
COAL PREPARATION
COMPUTERIZED SIMULATION
DEWATERING EQUIPMENT
MOISTURE
PACKED BEDS
REGRESSION ANALYSIS
VACUUM SYSTEMS
WATER REMOVAL