Gas separation – With nonliquid cleaning means for separating media – Solid agent cleaning member movingly contacts apparatus
Patent
1985-10-25
1987-04-07
Hart, Charles
Gas separation
With nonliquid cleaning means for separating media
Solid agent cleaning member movingly contacts apparatus
55302, 55323, 55382, 55497, 55521, B01D 4604
Patent
active
046558055
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a filter of the type comprising at least one filtering wall which has a front face and a rear face and which is normally permeated by the medium to be purified in a direction from the front face towards the rear face such that pollutants entrained are separated at the front face of the filtering wall and the purified medium is allowed to pass through the wall into a space located behind it, the flow of medium through said wall being reversible, if so desired, in order to remove said separated pollutants from the front face of the filtering wall so as to clean said wall.
BACKGROUND OF THE INVENTION
In conventional air or gas filters of the above-mentioned type, the polluting substances entrained by the air flow and separated by means of the filtering wall tend to adhere so strongly to the filtering wall that it is impossible or at any rate very difficult to remove them when the air flow, as is sometimes the case, is reversed for cleaning the filter. This shortens the life of conventional filters considerably.
BRIEF ACCOUNT OF THE INVENTIVE CONCEPT
The present invention aims at overcoming the above-mentioned drawback by means of a filter which can be efficiently cleaned by reversing the flow of medium, thus considerably increasing the life of the filter. According to the invention, this and further objects are achieved in that the front face of the filtering wall is provided with one or more elastic cover elements which are movable relative to the filtering wall and adapted upon reversal of the flow of medium, by elastic deformation under the action of said flow, to be removed wholly or partly from the wall while working said separated, adhering pollutants in order to facilitate the removal thereof.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
In the drawings,
FIG. 1 is a part-sectional perspective view showing a first alternative embodiment of the filter according to the invention,
FIGS. 2 and 3 are sectional views schematically showing a dust separating unit with a filter according to FIG. 1, the filter being illustrated in two states of operation,
FIG. 4 is a part-sectional perspective view showing a filter according to the invention in a second alternative embodiment,
FIGS. 5 and 6 show the filter of FIG. 4 in two different states of operation,
FIG. 7 is a part-sectional perspective view showing another embodiment of a dust separating unit with a filter according to the invention,
FIG. 8 is part-sectional perspective view showing the filter of the unit according to FIG. 7,
FIGS. 9 and 10 show the filter according to FIG. 8 in two different states of operation,
FIG. 11 is a sectional view showing yet another dust separating unit with two filters according to the invention in a first state of operation,
FIG. 12 is a cross-section of the unit according to FIG. 11,
FIGS. 13 and 14 show the unit according to FIGS. 11 and 12 with the associated filter in a second state of operation, and
FIG. 15 is a cross-section of a further alternative embodiment of the filter according to the invention.
DETAILED DESCRIPTION OF A NUMBER OF EMBODIMENTS
In FIGS. 1-3, the filter generally designated 1 comprises a cylindrical tubular filtering wall 2 which is closed at one end by a bottom wall 3. At its opposite end, the filter tube 2 has an opening 4 which is defined by a connecting flange 5. In actual practice, the tube or wall 2 may consist of a folded rigid filter paper which gives the tube the desired stiffness and allows air to pass therethrough while separating the entrained solid substances or pollutants. In the illustrated embodiment, it is assumed that the polluted air passes through the wall 2 in a direction from outside and in through the wall, as illustrated in FIG. 2. This means that the outer side 6 of the filtering wall 2 forms the front face which is first hit by the throughflowing air, while the inner side of the wall forms the rear face 7 which defines the cavity or space 8 into which the purified air is conducted after the pollutants ha
REFERENCES:
patent: 3568412 (1971-03-01), Schwab
patent: 3653189 (1972-04-01), Miyake et al.
patent: 3853508 (1974-12-01), Gordon et al.
patent: 4128408 (1978-12-01), Poole
patent: 4164400 (1979-08-01), Wald
patent: 4304579 (1981-12-01), Granville
patent: 4398931 (1983-08-01), Shevlin
American Precision Industries Bulletin #311, "We Clean Air".
Hart Charles
Industriell Arbetshygien i Soderhamn AB
LandOfFree
Filter, especially air filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Filter, especially air filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter, especially air filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1084511