Liquid purification or separation – Structural installation – Flume stream type
Patent
1991-07-22
1993-04-13
Silverman, Stanley S.
Liquid purification or separation
Structural installation
Flume stream type
210413, 210414, 210459, 210435, 209387, B01D 2923, B01D 2925, B01D 3502
Patent
active
052020193
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for the mechanical separation of insoluble solids from a liquid containing said solids.
The invention is particularly concerned with the mechanical purification of sewage, but it may well be utilized for other separation purposes, such as are desired to take place in applications within the agricultural, chemical or food processing industries or other processing industries, wherein insoluble solids are to be separated from a liquid flow carrying such solids.
By sewage is meant polluted potable water. Other wast water admixed sewage is also considered as sewage. The sewage purification in question aims at removal of undesired matter from the sewage mechanically.
In purification plants for sewage, paper and other solid matter, the sewage mass, are removed from the sewage, for thereafter to be burried at suitable filling places.
The prime and running cost of known purification plants, including mechanical mills, are high.
According to the present invention one has aimed at providing a simple and cheap purification device which is reliable and efficient in use.
This object is achieved by means of a purification device characterized through the features defined in the following claims.
The sewage purification device in accordance with the invention comprises substantially a strainer pipe which may be formed for the connection to a sewage pipe. The straine pipe is formed with perforations covering the lower half of the pipe in the position of use. The perforations of the strainer pipe are so small that undesired solid substances, i.e. the sewage mass, cannot penetrate therethrough and, accordingly, the strainer pipe serves to drain off mechanically purified sewage.
The strainer pipe is assigned an underlying water collecting pipe receiving mechanically purified sewage. In its portion opposite the strainer pipe, the collecting pipe is open, respectively has openings, holes, perforations, slots or apertures. Preferably, strainer pipe and water collecting pipe are sealingly connected to each other across a longitudinal area covered by their opposing holes, so that all or the predominant portion of the sewage leaving the strainer pipe, with certainty enters the water collecting pipe.
In order to counteract that solid matter, the sewage mass, deposits and builds up in the strainer pipe, so that its through-going bores or perforations are clogged in whole or in part, thereby reducing the capasity/efficiency of the strainer pipe, the latter must be provided with an internal scraper or pusher device for removal of solid sewage mass through an opening at one end of the strainer pipe.
Said scraper or pusher device comprises pivotable carrier flaps suspended on a piston rod/piston rod extension included in a double-acting pressure cylinder, the carrier flaps being adapted to take a first, active position when being displaced in the same direction as the flowing direction of the raw sewage, and a second, inactive, swung-up position, wherein they may slide over underlying sewage mass, when displaced in the opposite direction, i.e. countercurrently with respect to the flowing direction of the raw sewage.
Advantageously, the carrier flaps may carry brushes or, respectively, be constituted through brushing means.
The invention is further explained in the following in connection with an example of a preferred embodiment illustrated diagrammatically through a single FIGURE on the accompanying drawing.
In the FIGURE on the drawing, a sewage purification device according to the invention is shown in side view/axial section.
In accordance with the FIGURE, the uncleaned sewage, the raw sewage, has the direction of flow as indicated by the arrow P1.
The purification device according to the invention is generally denoted by the reference numeral 1 and comprises mainly a strainer pipe 2, which may be designed to be coupled to a sewage pipe line (not shown) represented through the arrow P1.
In accordance with the embodiment shown, the strainer pipe 2--over a portion of the axial length thereof--i
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Lithgow Thomas M.
Silverman Stanley S.
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