Gas separation – With nonliquid cleaning means for separating media – Solid agent cleaning member movingly contacts apparatus
Patent
1992-12-02
1994-07-05
Hart, Charles
Gas separation
With nonliquid cleaning means for separating media
Solid agent cleaning member movingly contacts apparatus
55223, 55256, B01D 4512, B01D 4702
Patent
active
053263839
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to suction cleaning systems and more particularly to suction cleaning systems for the removal in industrial or household debris. Such systems may be used for cleaning silos, industrial ovens or furnaces or other applications involving the removal of large amounts of small solid or particulate matter together with any water or moisture which might also be present.
There is disclosed in International Patent Application No. PCT/AU89/00335 a heavy duty suction cleaning system which may be mounted on a truck or trailer and which comprises a liquid ring air pump, a relatively coarse filter in a suction line upstream of the pump to filter larger particles and larger matter prior to the pump and a separator in a discharge line downstream of the pump for separating from the discharge airstream water and smaller particulate matter discharged from the pump.
In this previously proposed system the relatively coarse filter is incorporated in a tank in which larger matter is accumulated, the fine particulate matter flowing through the filter to the pump. Although the filter does not trap dust and other fine particulate matter, larger size particles are progressively accumulated in the filter and it is necessary for the filter to be cleaned periodically, typically once a week depending on the usage of the system. Failure to clean the filter will result in reduced performance and, ultimately, in blockage. The liquid ring pump is capable of generating very high suction forces and in the event of a significant blockage in the upstream filter the suction generated by the pump can damage certain of the components.
According to the present invention there is provided a suction cleaning system comprising an air pump, first separating means in a suction line leading to the pump for separating substantially all particulate matter from the incoming airstream with the exception of fine particulate matter, second separating means upstream of the pump and downstream of the first separating means for separating the fine particulate matter from the incoming air, said second separating means comprising a water chamber, means for feeding the incoming air and fine particulate matter through the water chamber to generate an air and water stream within the chamber whereby the particulate matter is held in suspension, and means for causing air substantially free from the suspended particulate matter to be withdrawn from the chamber for passage through the pump.
In a preferred embodiment of the invention the water chamber includes baffles which generate at least one circulating stream of air and water, with the incoming air and fine particulate matter being charged into the water to generate the circulating stream.
Preferably, the pump is a liquid ring pump having a water sealing system between a pump rotor and casing and a further separator is downstream of the pump to separate from the discharged air liquid and any particulate matter which may have passed into the pump, separated water being fed from the separator to the pump to replace sealing water discharged from the pump.
An embodiment of the invention will now be described by way of example only with reference to the accompanying drawings in which:
FIG. 1 shows schematically a suction cleaning system in accordance with a preferred embodiment of the invention;
FIG. 2 is a schematic section showing an upstream separating system of the suction cleaning system;
FIG. 3 shows schematically a separating chamber of the upstream separating system; and
FIG. 4 shows schematically an inlet bubble pipe associated with the upstream separating system.
The suction cleaning system in accordance with the preferred embodiment of the invention comprises a pump 2 driven via a motor 4, preferably an internal combustion engine, via a belt drive system. The pump 2 is in the form of a liquid ring pump consisting of a vane rotor eccentrically mounted within a casing. The casing is partially filled with water which, when the rotor is driven, is formed into an annular layer between th
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Hart Charles
Spoutvac Manufacturing Pty Ltd
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