PLASMA PROCESSING OF URANIUN- CONTAINING SOLID FUELS V.E. Messerle Combustion Problems Institute, Almaty, Kazakhstan Institute of Thermophysics of SB RAS, Novosibirsk, Russia O.A. Lavrichshev, A.B. Ustimenko Plasmatechnics R&D LLP, Institute of Experimental and Theoretical Physics of Kazakhstan National University, Almaty, Kazakhstan E-mail: [email protected]
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PLASMA PROCESSING OF URANIUN- CONTAINING SOLID FUELS
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PLASMA PROCESSING OF URANIUN-
CONTAINING SOLID FUELSV.E. Messerle
Combustion Problems Institute, Almaty, Kazakhstan Institute of Thermophysics of SB RAS, Novosibirsk, Russia
O.A. Lavrichshev, A.B. UstimenkoPlasmatechnics R&D LLP, Institute of Experimental and Theoretical Physics of
Kazakhstan National University, Almaty, KazakhstanE-mail: [email protected]
Generation of electricity in the world
1 – natural gas, 2 – nuclear power, 3 – hydroelectric, 4 – renewable energy sources, including waste,5 – coal, including lignite and shale,6 - oil fuel
2Key World Energy Statistics 2017: International Energy Agency.
THE MOTIVATION FOR THE DEVELOPMENT OF PLASMA PROCESSING OF URANIUM-BEARING COAL
Balance reserves of coal in Kazakhstan – 33
billion tons
Uranium-bearing coal(0,06% U) -
14 billion tons
Plasma processing of uranium-bearing coal would increase the fuel base of the Republic of Kazakhstan by 42%, while the existing uranium base – fivefold, up to 5 million tons
The Economic Effect of plasma processing of
uranium-bearing coal will exceed $ 550 billion3
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COAL UTILIZATION
SiO2Fe2O3Al 2O3CaOMgO
UO2U2C3
COMPREHINSIVE PLASMA PROCESSING OF COAL
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С+H2O=CO+H2
MenOm + C = nMe +mCO
МеnOm+2mC=MenCm+mCO
PLASMA U, UO, UO2, UO3
For computation of the solid fuels comprehensive processing thermodynamic code TERRA was used. The calculations were performed over a range of temperatures from 300 to 4000 K and pressure 0.1 MPa.
THERMODYNAMIC COMPUTATION
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Chemical analysis of SFs, Wt. % dry mass basis
С О Н N S Si Al Fe Ca Mg Ti K Na U
Nizhneilli brown coal (Kazakhstan), Аsh=12%, HHV=20,400 kJ/kg, Vdaf=39%
Temperature dependence of coal gasification degree at comprehensive processing of the brow coal (1, 3) and shale (2, 4) and specific power consumption for the processes
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The mixture composition is: 1, 2 – plasma pyrolysis of brown coal and shale, resp.3 – 100% of coal + 85% of steam4 – 100% of shale + 10% of steam
Temperature dependence of concentrations of components in gas phase at comprehensive processing of brown coal and shale
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100% of brown coal + 85% of steam 100% of shale + 10% of steam
Temperature dependence of concentrations of mineral components in condensed phase and Uranium containing components in gaseous
phase at complex processing of the brown coal10
100% of brown coal + 85% of steam
Temperature dependence of concentrations of mineral components in condensed phase and Uranium containing components in gaseous
phase at complex processing of the shale11
100% of shale + 10% of steam
BLOCK DIAGRAM OF PLASMA PROCESS FOR URANIUM EXTRACTING FROM COAL
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С+H2O=CO+H2
UnOm+mC=mCO+nU
plasma gasifier
Off-gas cooling section –heat exchanger
solid fuel dust hopper
Layout of Plasma Installation for Processing of Coal
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EXPERIMENTAL REACTOR FOR PLASMA GASIFICATION AND COMPREHENSIVE PROCESSING OF COAL