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AssigneeThe Secretary of State for the Environment in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
InventorsBrian W. Gulley, Gilbert J. Williamson, Richard Q. Carmichael, David F. Cooke, Roderick Taylor
Estimating the term…
Refuse derived fuel is produced by taking raw refuse, pulverizing it and n screening it to remove fines and oversize material, the screened residue being passed to an air classifier where the light fraction, rich in paper and plastics, is separated. This light combustible refuse fraction is then passed to a densifying machine, either directly or via a secondary shredder, to produce partially compacted material which is then dried in a rotary dryer. The dried material can be passed to a second densifying machine which produces pellets in the form of small dense cylinders or blocks having a calorific value equal to about half that of coal. Coal dust or other combustible particulate material can be added to and mixed with the combustible fraction between the two densifying machines.
In a process of producing fuel from raw refuse material comprising the steps of:
In an apparatus for producing fuel from raw refuse material of the type comprising means for subjecting the material to a dry separating step to separate a light moist combustible fraction therefrom, a first densifying machine for partially compacting the thus separated light moist combustible material, and a drying device adapted to pass air through the thus separated light moist combustible material to dry said material to a moisture content of from 10 to 25% by weight, the improvement which comprises so arranging said first densifying machine and said drying device relative to one another and relative to the passage of said material thereto that said material is compacted by said first densifying machine prior to the drying of said partially compacted material by said drying device.
Dependencies are inferred from the claim text.