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A 32-month gasifier mechanistic study and downstream unit process development program for the pressurized ash-agglomerating fluidized bed gasification system: Quarterly report, April 1-June 30, 1985

Technical Report ·
OSTI ID:5247220
The design report for the KRW external hot gas cleanup system is in progress. The second air-blown gasifier PDU test for evaluation of in-bed desulfurization was completed. Gasifier operability with in-bed desulfurization was demonstrated by successful operation of the PDU. This success was attributed to improved operation of the dolomite feeder, operational flexibility of the modified ash annulus gas distributors, and specific gasifier startup and transition strategies. The solid wastes discharged from the PDU gasifier during in-bed desulfurization testing include a mixture of agglomerate ash and spent sorbent. The spent sorbent (calcium sulfide) can be converted to calcium sulfate during the in-bed desulfurization process. This is a chemical reaction which minimizes the reactive waste's hazardous properties. Disposal studies and characterization of the PDU reactive wastes were initiated. In addition, process performance was analyzed in terms of gasification rate and product gas composition for selected PDU tests. Work continued to develop process models to enhance predictions of gasifier performance. An evaluation of PDU test data (1983 to 1985) is in progress to compare PDU fines collection and recycle performance based on isokinetic solids measurements versus predicted values. Preliminary results suggest that further reductions in fines loss can be achieved at the PDU by modifying the geometry of the secondary cyclone.
Research Organization:
KRW Energy Systems, Inc., Madison, PA (USA)
DOE Contract Number:
AC21-84MC21063
OSTI ID:
5247220
Report Number(s):
DOE/MC/21063-2571; ON: DE88001073
Country of Publication:
United States
Language:
English

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A 32-month gasifier mechanistic study and downstream unit process development program for the pressurized ash-agglomerating fluidized bed gasification system: Quarterly report, April 1-June 30, 1986
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Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
AGGLOMERATING ASH PROCESS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CHEMICAL REACTIONS
COAL GASIFICATION
CONCENTRATORS
CYCLONE SEPARATORS
DATA ANALYSIS
DESULFURIZATION
DOCUMENT TYPES
DOLOMITE
EQUIPMENT
FLUIDIZED BEDS
FLUIDS
FUEL GAS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASES
GASIFICATION
HOT GAS CLEANUP
INERTIAL SEPARATORS
KRW GASIFICATION PROCESS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MANAGEMENT
MINERALS
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PRESSURIZING
PROCESS DEVELOPMENT UNITS
PROGRESS REPORT
PURIFICATION
SEPARATION EQUIPMENT
SOLID WASTES
THERMOCHEMICAL PROCESSES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES