Gas separation – With nonliquid cleaning means for separating media – Cohesive filter media cleaning
Patent
1981-01-30
1982-06-22
Nozick, Bernard
Gas separation
With nonliquid cleaning means for separating media
Cohesive filter media cleaning
55337, 55429, 55432, 55472, 55498, 55502, B01D 4604
Patent
active
043360408
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a dust separator of the type which comprises a fan with a drive motor, a cyclone separator connected to the suction side of the fan as a coarse separator and provided with an inlet for a gaseous fluid mixed with dust, a filter projecting freely coaxially into the cyclone apparatus and arranged as a fine separator between the interior of the cyclone apparatus and the suction side of the fan, and an outlet for cleaned gaseous fluid at the pressure side of the fan. Such a dust separator is described, inter alia, in DE No. 2,053,778. In this case, the filter projecting freely coaxially into the cyclone apparatus consists of a cylindrical core with a plurality of rows of slits, which are covered by star-shaped filter elements which are fitted in an air-tight manner and are open towards the slits and which have the form of cassettes covered on all sides by a filter material. Together with the cyclone apparatus and the rest of the dust separator the filter forms an integrated rigid construction. For the cleaning of the filter there is a separate cleaning pipe to which pressurized air is supplied and which is rotatable by means of a motor to supply cleaning pulses of pressurized air to the several filter cassettes in turn. This blowing of the filter involves a considerable increase in cost of the dust separator, because it requires both pressurized air and electricity for its operation. It is important to keep the filter clean, because increasing coating or choking of the filter leads to a great reduction in the suction effect.
It was also previously known, in dust separators or vacuum cleaners, particularly for industrial purposes, to have a filter in the form of a tubular member with a smooth outside and to provide, for intermittent cleaning of the filter, some form of vibrator or other shaking mechanism operatively connected to the filter, which is switched on, manually or automatically, when the fan is switched off. The vibration or shaking of the filter cannot take place, however, during suction, because then there is a risk of particles of dust being pressed into the pores of the filter and sticking so hard in these that they then cannot be removed by vibration or shaking of the filter. The known devices for intermittent vibration or shaking of the filter mean that the dust separator is generally large and heavy. They are also expensive and require manual or electrical control.
In order to render possible continuous cleaning of the filter without risk of particles of dust being pressed tight into the pores of the filter in this manner, a dust separator of the kind referred to above is characterized, according to the invention, in that the filter and the suction fan with the drive motor are arranged as a separate unit resiliently connected to the cyclone apparatus, and in that the filter comprises a pleated outer casing of filter material disposed round a perforated tubular core and clamped between its ends, the pleats of which extend axially along the core and are fixed to this at their inner folding edges while the outer folding edges are free. Thus the necessary vibration of the filter is obtained without extra means by the action of the fan proper and its drive motor, which are running during the suction.
In the dust separator according to the invention the fine dust which is deposited on the filter, gradually forms a relatively hard surface covering. As a result of the fact that the filter is exposed to vibrations because it is mounted on the separate unit resiliently connected to the cyclone apparatus, the surface covering thus formed is shaken apart and the relatively large particles packed together are sucked by the air passing at high speed between the housing of the cyclone apparatus and the filter, to be pressed down to the bottom portion together with the coarse dust. The construction of the filter plays an important part in achieving this function. The outer, free folding edges form resilient elements, and through the powerful flow of air through the cyclone apparatus bet
REFERENCES:
patent: 3240000 (1966-03-01), Hayes
patent: 3425192 (1969-02-01), Davis
patent: 3895929 (1975-07-01), Jysky et al.
patent: 3902999 (1975-09-01), Hawley
patent: 4172710 (1979-10-01), Van der Molen
Dustcontrol AB
Nozick Bernard
LandOfFree
Dust separator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dust separator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust separator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-651039