Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Patent
1999-07-12
2000-09-12
Simmons, David A.
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
210407, B01D 2118
Patent
active
061164305
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to filtration and, in particular, to a filtration apparatus in which a fluid, preferably water, passes through a fine mesh screen entrapping solid matter or particles which is/are cleared from the fine mesh screen allowing the filtration apparatus to more efficiently remove the solid matter or particles from the fluid.
BACKGROUND TO THE INVENTION
Within the filtration industry, and with particular regard to the filtration of sewage in a sewerage treatment works, there are problems associated with the filtration of solid matter and/or particles through screen meshes and the like. In the particular case of a sewerage treatment works, the presence of mashed toilet paper as the solid matter and/or particles in the already primary treated sewage causes problems with fine mesh screens. This is because the mashed toilet paper is cellulose which tends to be entrapped by the fine mesh screen and thereby builds up to be an obstruction to the efficient passing of the primary treated sewage, which at this stage of the treatment is relatively clean water with a certain amount of impurities dissolved therein. As the cellulose is entrapped the efficiency of the treatment of the filtration process decreases and therefore regular clearing, cleaning and maintenance of the fine mesh screens is required.
Therefore it would be advantageous to provide a filtration apparatus in which a fluid, preferably water, passes through a fine mesh screen entrapping solid matter or particles which is/are cleared from the fine mesh screen while the apparatus is being used. Such an apparatus would improve the efficiency of the filtration process as less regular clearing, cleaning and maintenance would be required.
Although the foregoing and following description refers primarily to filtration apparatus for sewerage or water treatment works, it will be readily appreciated that the filtration apparatus of the present invention would be suitable for the filtration of other liquids as well as gases as the filtration apparatus is suitable for filtering solid matter and/or particles which are present in a variety of fluids.
OBJECT OF THE INVENTION
It is an object of the present invention to provide an improved filtration apparatus which substantially overcomes or ameliorates the above mentioned disadvantages. At the very least, the object of the invention is to provide an alternative to known filtration devices.
SUMMARY OF THE INVENTION
According to one aspect of the present invention there is provided a filtration apparatus comprising:
a filter screen arranged so as to filter solid matter and/or particles or the like from a fluid stream passing through the filter screen; and,
a barrier means located on a downstream side of an adjacent to said filter screen and having a plurality of reflector ribs provided therein, each of said reflector ribs having a concave surface facing substantially in an upstream direction, wherein a portion of the fluid passing through the filter screen is directed back towards the filter screen, the barrier means also having fluid vents provided therein to allow fluid to pass through the barrier means whereby, in use, the fluid directed back towards the filter screen dislodges any solid matter and/or particles held thereon so as to clear the filter screen and maintain fluid flow therethrough.
Preferably said barrier means further comprises a plurality of intermediate deflector ribs provided therein, each of said deflector ribs having a convex surface facing substantially in said upstream direction.
Typically said plurality of reflector ribs are substantially parallel and said plurality of deflector ribs are parallel, and wherein said convex surfaces of the deflector ribs and said concave surface of the reflector ribs are aligned so as to form a corrugated surface of the barrier means facing substantially in an upstream direction.
In a preferred form of the invention, the filtration apparatus is located in a housing having an inlet and an outlet for the passage of the fluid and a sedime
REFERENCES:
patent: 4097382 (1978-06-01), Cruea
Aligned Concepts Pty. Ltd.
Barry Chester T
Simmons David A.
LandOfFree
Filtration apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Filtration apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filtration apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-87997