Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Traveling items shifted to form line – or into end or edge...
Patent
1991-09-19
1995-06-13
Bidwell, James R.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Traveling items shifted to form line, or into end or edge...
209566, 209587, 209657, 209914, 209930, 198442, 198443, B07C 502, B65G 4712
Patent
active
054234310
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method and an apparatus waste handling especially for sorting waste.
Steadily growing awareness is being paid to industrial and domestic waste, and considerable efforts have been made and are being made to process such waste in the best possible manner, inter alia to prevent injurious effects, to simplify handling of the waste and, as far as possible, to utilize the resource which such waste constitutes.
As a rule, waste from different collection points is allowed to be mixed and conveyed in common transport containers to plants for the separation of the waste or its deposition. Since the waste is allowed to become mixed on the way to the separation plants, the plants are supplied with a mixture of waste from which it is difficult to separate those fractions of the waste which allow for recovery and recycling. A number of experiments have been carried out in dividing up the waste at the source (sorting at source), but such experiments have not generally proved successful, because households lack the incentive to effect such sorting, because many households perceive the sorting and storage of separated waste as unpleasant, and because most buildings lack the space for storing of separated waste. The costs for transport of waste to its final deposition or to plants for the storage of separated waste also increase the sorting at the source, since such transports must be effected with the waste placed in separate containers. In turn, this requirement implies that the refuse collection vehicles must either be fitted with more than one collection receptacle, or that the refuse collection vehicles only collect one type of waste on each separate occasion.
An analysis of the composition of domestic waste and of the problems inherent in sorting the waste in the sorting plants shows that a sorting of the waste at the source into a wet fraction and a dry fraction entails considerable rationalization of the subsequent handling of the waste in the sorting plants, on condition that the waste sorted at the source can be transported to the sorting plants without the two fractions becoming intermixed. For economical reasons, this transport should also be effected in transport containers which are common to the waste.
The solution to the above problems will be attained by means of a method and an apparatus according to the present invention.
One of the advantages attained by application of the present invention is that existing refuse chutes in buildings can be employed in their present state. No special devices are required at the refuse chutes, such as indication buttons which are to be pressed to indicate the type of waste in order thereby to actuate means in the refuse storage chamber which cater for displacement of the waste to waste containers which correspond to the operating button which has been pressed. Such equipment is relatively bulky, for which reason many of the refuse storage chambers currently in use would need to be enlarged, and in addition all hatches to the refuse chute apart from that hatch being used must be blocked as long as any hatch for a special refuse chute is in the open position.
Furthermore, the present invention entails that refuse compactor vehicles which are already in service can be employed in their present state. Hence, no modification of the vehicles such that they are provided with different compartments for different types of waste is necessary. This circumstance is of major economical advantage, since it is obvious that the refuse collection vehicle fitted with a plurality of compartments will, in principle, be more complicated, and in particular if it is to be possible that the waste is compacted in each compartment. Furthermore, it must be expected that only one of the compartments will be completely filled, while the rest will remain only partly filled, which results in an inefficient utilization of the transport capacity of the vehicle.
Those refuse bags or containers which were closed in the household, for example by knotting need not, in the a
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Bidwell James R.
Nguyen Tuan N.
Sellsberg Engineering AB
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