Page 316 - Materials Chemistry, Second Edition

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Incineration of MSW 287
18. For RDF to produce the same amount of heat as coal, more ash will probably be produced.
Explain.
19. Compare and contrast RDF and raw MSW in terms of fuel properties. How do they differ in
terms of heat content, moisture content, density, and ash content?
20. How do RDF and coal differ in terms of emissions of SO ,NO , and HCl? How do they dif-
x
2
fer in ash composition?
21. A materials recovery facility is being installed in Pristine, Illinois (pop 110,000). The MRF
will be receiving mixed MSW. RDF will be produced. For maximum efficiency and ease
of mixing with coal, what form (e.g., fluff, wet-pulped, densified, etc.) of RDF is rec-
ommended?
22. How will the RDF be stored: (a) in the customers’ yard for easy utilization; (b) in a covered
pole barn; (c) no need to store the RDF as it will be immediately sent to market; (d) in
50:50 mixtures with coal in customers’ yard.
23. An incinerator burns 120 MT/h of MSW with the formula C H O N S. How much air
455
235
4
285
is needed to combust this waste? A rate of 35% excess air is used during combustion.
24. Calculate the heating value for the waste discussed in question 23.