Solid material comminution or disintegration – Processes – With classifying or separating of material
Patent
1989-05-11
1991-04-23
Focarino, Margaret A.
Solid material comminution or disintegration
Processes
With classifying or separating of material
209 12, 209 19, 209 441, 209241, 209257, 209284, 209290, 209630, 209634, 209683, 209930, 241 81, 241DIG38, B02C 2314, B07B 900
Patent
active
050093703
ABSTRACT:
A municipal solid waste material sorting system comprises a multi-stage trommel having a relatively short first stage section with relatively small holes for screening out grit, dirt, coins, small stones and the like, a second substantially longer second stage section for screening out beverage bottles, metal cans, and other waste materials of similar size and a third stage relatively short section for screening out large objects such as half gallon and gallon plastic, metal and glass containers. The respective screened municipal solid waste fractions from each of the three trommel sections are advantageously handled in respective handling streams. Materials screened in the first stage section of the trommel may be further classified as by a vibrative air table-specific gravity device to recover useful materials, such as glass cullet and coins. Materials screened in the second stage of the trommel may be further screened in a two-section disk screening and air classification arrangement. Materials screened in the third section of the trommel are further classified by manually sorting large size objects, particularly half-gallon and gallon size metal, glass and plastic containers to a take-away conveyor for further processing. Unsorted materials from the third trommel section are directed by a U-turn conveyor system to a larger conveyor which also receives the largest oversize materials discharged from the low, discharge end of the trommel. This large conveyor feeds to a shredder from which the shredded material may be directed to a point of use or a reserve discrete storage facility.
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Focarino Margaret A.
New Life Foundation
Wacyra Edward M.
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