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Books > Professional & Technical > Energy technology & engineering > Heat transfer processes
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Combustion Characteristics of Simulated Municipal Solid Wastes in a Fixed Bed (Hardcover)
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Combustion Characteristics of Simulated Municipal Solid Wastes in a Fixed Bed (Hardcover)
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The notion of a lifestyle system leading to zero waste is obviously
appealing, and a strategy of total reuse and recycling of: waste
material is often advocated. However, there is a growing
realization that the recycling process itself produces waste, and
the environmental and economic cost of recycling and reusing
certain materials invalidates the zero waste approach as a
universally viable solution. Thus, solutions must be found to deal
with the part of waste that it is not practicable to recycle or
reuse. The energy content of municipal waste (whether raw or
classified) is about 10MJ kg-1. If the total amount of waste
material in any region is around 30 million tons per year or about
1000 kg/ s, the total energy is thus 10,000MJ /s = 10,000 MW. At an
electricity generation efficiency of 20%, this could provide 2000
MW plus about 6000MWof district heating. This energy source is
largely biomass, which is carbon dioxide neutral, and thus does not
contribute to the total atmospheric greenhouse gases. The present
work includes many aspects of municipal solid waste combustion,
such as the effects of moisture, particle size and ash content
effects on solid particle during process rates (moisture
evaporation, volatile release, and char burning rate). The COMMENT
code has developed to reveal much detailed information on the
combustion processes. Through experimental and numerical
investigations, the combustion process of simulated MSW in bed can
be better understood and the experiment results can be used to
amend the mathematics model and be consulted by the application in
the project. The results from modeling can show the combustion
process, and make us deeply know how the heat transfers in the fuel
and gas yields from fuel. At the same time, the simulation can
predict the maximum temperature of waste incineration and the trend
concerning combustion.
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