Characteristics of carbonized sludge for co-combustion in pulverized coal power plants
- Department of Environmental Engineering, Hanbat National University, Daejeon 305-719 (Korea, Republic of)
Co-combustion of sewage sludge can destabilize its combustion profile due to high volatility, which results in unstable flame. We carried out fuel reforming for sewage sludge by way of carbonization at pyrolysis temperature of 300-500 deg. C. Fuel characteristics of carbonized sludge at each temperature were analyzed. As carbonization temperature increased, fuel ratio increased, volatile content reduced, and atomic ratio relation of H/C and O/C was similar to that of lignite. The analysis result of FT-IR showed the decrease of aliphatic C-H bond and O-C bond in carbonization. In the analysis result of TG-DTG, the thermogravimetry reduction temperature of carbonized sludge (CS400) was proven to be higher than that of dried sludge, but lower than that of sub-bituminous coal. Hardgrove grindability index increased in proportion to fuel ratio increase, where the carbonized sludge value of 43-110 was similar or higher than the coal value of 49-63. As for ash deposits, slagging and fouling index were higher than that of coal. When carbonized sludge (CS400) and coal were co-combusted in 1-10% according to calorific value, slagging tendency was low in all conditions, and fouling tendency was medium or high according to the compositions of coal.
- OSTI ID:
- 21550351
- Journal Information:
- Waste Management, Vol. 31, Issue 3; Other Information: DOI: 10.1016/j.wasman.2010.10.009; PII: S0956-053X(10)00533-7; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASHES
BITUMINOUS COAL
CALORIFIC VALUE
CARBONIZATION
COMBUSTION
FLAMES
FOSSIL-FUEL POWER PLANTS
FOULING
FOURIER TRANSFORM SPECTROMETERS
GRINDING
INFRARED SPECTRA
LIGNITE
PULVERIZED FUELS
PYROLYSIS
SEWAGE SLUDGE
THERMAL GRAVIMETRIC ANALYSIS
VOLATILITY
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
COMMINUTION
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
MACHINING
MATERIALS
MEASURING INSTRUMENTS
OXIDATION
POWER PLANTS
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
SEWAGE
SLUDGES
SPECTRA
SPECTROMETERS
THERMAL ANALYSIS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
WASTES