Modeling of the reburning process using sewage sludge-derived syngas

Journal Article · Sun Apr 15 00:00:00 EDT 2012 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2011.10.013· OSTI ID:21612961

Werle, Sebastian ^[1]

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1. Institute of Thermal Technology, Silesian University of Technology at Gliwice, 44-100 Gliwice, Konarskiego 22 (Poland)

Highlights: Black-Right-Pointing-Pointer Gasification provides an attractive method for sewage sludges treatment. Black-Right-Pointing-Pointer Gasification generates a fuel gas (syngas) which can be used as a reburning fuel. Black-Right-Pointing-Pointer Reburning potential of sewage sludge gasification gases was defined. Black-Right-Pointing-Pointer Numerical simulation of co-combustion of syngases in coal fired boiler has been done. Black-Right-Pointing-Pointer Calculation shows that analysed syngases can provide higher than 80% reduction of NO{sub x}. - Abstract: Gasification of sewage sludge can provide clean and effective reburning fuel for combustion applications. The motivation of this work was to define the reburning potential of the sewage sludge gasification gas (syngas). A numerical simulation of the co-combustion process of syngas in a hard coal-fired boiler was done. All calculations were performed using the Chemkin programme and a plug-flow reactor model was used. The calculations were modelled using the GRI-Mech 2.11 mechanism. The highest conversions for nitric oxide (NO) were obtained at temperatures of approximately 1000-1200 K. The combustion of hard coal with sewage sludge-derived syngas reduces NO emissions. The highest reduction efficiency (>90%) was achieved when the molar flow ratio of the syngas was 15%. Calculations show that the analysed syngas can provide better results than advanced reburning (connected with ammonia injection), which is more complicated process.

• OSTI ID: 21612961
• Journal Information: Waste Management, Vol. 32, Issue 4; Other Information: DOI: 10.1016/j.wasman.2011.10.013; PII: S0956-053X(11)00472-7; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
AMMONIA
ANTHRACITE
BOILERS
COMBUSTION
COMPUTERIZED SIMULATION
CONVERSION
EFFICIENCY
FUEL GAS
GASIFICATION
NITRIC OXIDE
SEWAGE SLUDGE
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GAS FUELS
GASES
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SEWAGE
SIMULATION
SLUDGES
THERMOCHEMICAL PROCESSES
WASTES