MIL-HDBK-1003/6
Table 13
Heating Values and Composition of Typical Unprepared
and Prepared American Solid Waste
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*
*
*
*
Unprepared Refuse
Prepared Refuse
*
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*
*
*
*
* Double
*
As
* Received(1) * Coarse(2)
* Fluff(3) *Screened(4)*
*
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* Heating Value, Btu/lb *
*
*
5,100 *
*
4,500
4,600
5,900
*
*
*
*
*
*
* Analysis, % by Weight *
*
*
*
*
*
*
*
*
*
*
Ash & Inerts
24
20
21
13
*
*
*
*
*
*
Moisture
30
29
22
24
*
*
*
*
*
*
Combustible Matter
46
51
57
63
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(1)
Municipal solid wastes (MSW) used as fuel in as-discarded form without
oversize bulky waste such as water heaters, etc.
(2)
MSW processed to coarse particle size with glass and ferrous metal
removal such that 95 percent by weight passes through a 6-inch square
mesh screen.
(3)
Shredded fuel derived from MSW processed for the removal of metal, glass
and other entrained inorganics such that 95 percent by weight passes
through a 2-inch square mesh screen.
(4)
Shredded fuel processed similarly to (3) except for additional screening.
(Samples not from same processing facility as (3).)
Mass Burning. Mass burning of unprepared refuse in heat recovery
5.1.5.1
boilers can be a technically reliable, environmentally acceptable, and an
economic solution to the disposal of refuse when usable energy is generated.
Refuse Derived Fuel (RDF). Refuse derived fuel (RDF) refers to
5.1.5.2
solid waste that has been sorted and shredded into an approximate uniform
size. Separation of noncombustible materials is a part of this process. This
process should be carefully compared to the mass burning process as this
additional processing of the fuel may not be cost effective. Uniformity of
the refuse for burning is improved, but the capacity to deliver RDF to the
incinerator boiler on a reliable basis has been a technical problem.
Preparation of refuse by shredding and separation of combustible materials
prior to combustion provides a more uniform product to burn. Prepared refuse
of the composition and heating values shown in Table 13 is fired by itself or
in combination with coal.
5.2
Fuel Applications and Equipment
5.2.1
Applications. Selection of fuel burning equipment for central
heating plants is basically dependent on fuel selection. The availability of
the fuel throughout the projected life of the facility must be considered or
the facility should be designed to convert to another available fuel at some
future date when the original fuel may become scarce or prohibitive in cost.
The required pollution abatement equipment and/or systems which will conform
to applicable codes and regulations must be considered.
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