Liquid purification or separation – Filter – Medium – cleaner or agitator moved by fluid
Patent
1987-07-15
1989-05-23
Lacey, Daivd L.
Liquid purification or separation
Filter
Medium, cleaner or agitator moved by fluid
210 98, 210111, 210113, 210359, 210398, 210407, 55215, 55299, 55305, 55361, B01D 3300
Patent
active
048328430
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to the art of removal of suspended particles and inclusions from fluid media, and more particularly to an apparatus for filtering a fluid medium.
The invention can be used very efficiently for removing solids from chemical products, purifying drinking and circulating water, cleaning industrial effluents from silt and slag, and air dedusting.
The invention can also be used with advantage for removing chemical impurities from liquids and gases, and for drying air and gas.
BACKGROUND OF THE INVENTION
Cleaning liquids and gases from harmful contaminants and solids has become lately a very important aspect of industrial production. However, the present-day filtering systems are either too bulky, or fail to provide sufficient output capacity, or have insufficient pressure sealing during operation, which is especially disadvantageous when filtering harmful or agressive media. So far, no efficient devices are available for cleaning agressive fluid media containing suspended particles, such as devices for cleaning effluents from cattle-breeding farms.
There is known an electromagnetic separator comprising a perforated tray located in a magnetic field and rotated by a drive.
However, this device is disadvantageous because it is structurally overcomplicated.
There is also known an apparatus for filtering liquids comprising a hemetically sealed housing having a slot-shaped opening through which an endless belt of filter cloth is conveyed. The top part of the housing is connected to a means for supplying a liquid to be cleaned, whereas the bottom part thereof is connected to a means for evacuating the clean liquid. The apparatus is further provided with a means for removing cake from the belt of filter cloth (cf., e.g., SU, A No. 79,522).
An inherent disadvantage of this apparatus is its low efficiency. Also, the apparatus is not provided with reliable pressure sealing facilities to result in less efficient operation.
There is further known an apparatus for filtering a fluid medium comprising a hollow housing, a flexible filtering element accommodated inside the housing, and a means for feeding the liquid being cleaned, discharging the clean medium, and evacuating filter cake. (cf., SU, A, No. 98,539).
However, this prior art apparatus is also inherently disadvantageous because periodic cleaning of the filtering elements necessitates termination of the filtration process to result in low efficiency during operation. In addition, the apparatus is insufficiently sealed from the outside, whereby filtering media giving off acrid ordous or agressive media is not possible.
This invention aims at providing an apparatus for filtering a fluid medium, which would be so constructed as to ensure continuous cleaning of the filtering element during operation, while completely separating the medium being cleaned from the outside.
The aims of the invention are attained by that in an apparatus for filtering a fluid media comprising a hollow housing, a flexible filtering member accommodated inside the housing, and means for feeding the fluid to be cleaned, discharging the clean medium, and evacuating filter cake, according to the invention, the housing is hermetically sealed, whereas the filtering member is fashioned as a hose ends of which are turned inside out to be attached to the periphery of the inside surface of the housing to define therewith cavities each communicating with the means for discharging the clean medium, a partition wall having an opening being arranged between the ends of the hose for ensuring the passage of the hose therethrough, this partition wall dividing the interior of the housing occupied by the hose into two chambers each communicating with the respective means for feeding the medium to be cleaned and evacuating the filter cake.
The present invention makes it possible to substantially increase the filtration efficiency.
Such an increase has been attained by that used as a filtering member is the aforementioned flexible hose movable through the hole in the pa
REFERENCES:
patent: 391328 (1888-10-01), McTighe
patent: 3983036 (1976-09-01), Lauzeral
patent: 4147114 (1979-04-01), Holmes
patent: 4155850 (1979-05-01), Rathbone
patent: 4326963 (1982-04-01), Watson
patent: 4713175 (1987-12-01), Bray
Inzhenerny Tsentr "Truboprovod"
Lacey Daivd L.
Lithgow Thomas M.
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