Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Reexamination Certificate
1995-01-24
2001-10-02
Bushey, C. Scott (Department: 1724)
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
C055S323000, C055S327000, C055S443000, C055S472000, C096S392000
Reexamination Certificate
active
06296680
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to bulk material handling and more particularly to an apparatus into which particulate or comminuted material contents of rupturable bags may be charged for further material handling, generally referred to in the relevant industry as filter bag dump stations.
2. Description of the Prior Art
In the prior art, there has been developed and in widespread use, a type of apparatus into which particulate material contents of rupturable bags may be charged for further handling such as pneumatic conveying, processing, storing and the like. Such type of apparatus generally includes a hopper having a grate disposed across an inlet opening thereof into which the contents of bagged material may be charged, a filtering unit having an inlet communicating with the interior of the hopper and a blower for drawing airborne particles produced by the charging of such material into the hopper from the vicinity of the work area and conveying them through the filter unit to prevent such particles from escaping into the ambient atmosphere and possibly causing environmental problems in a work area. An example of such an apparatus is illustrated and described in U.S. Pat. No. 4,889,452.
The type of filter unit provided in such an apparatus typically consists of a tube sheet forming a wall of an air plenum, a plurality of elongated, tubularly configured cages mounted on the tube sheet with the interiors thereof communicating with the air plenum through openings in the tube sheet, and filter media consisting of fabric or felt materials disposed on the tubular cages. A motor driven centrifugal blower typically is employed to create an air flow for capturing airborne particles at the charging inlet of the hopper, conveying such particles through the filtering media for removal and discharging the clean air into the ambient atmosphere. Although such particle filtration process has been highly effective in capturing and removing a substantial portion of the airborne particles produced in conventional bag dump stations of the type described, it has been found that such conventional stations are not always sufficiently effective in removing particulates of less than one micron size in compliance with more stringent federal and state dust control requirements.
SUMMARY OF THE INVENTION
Accordingly, it is the principal object of the present invention to provide an improved bag dump apparatus.
Another object of the present invention is to provide an improved bag dump apparatus capable of not only removing airborne particles produced when charging the contents of comminuted material into such apparatus but further recovering such material at the work site for further handling such as conveying, processing, storing and the like.
A further object of the present invention is to provide an improved bag dump apparatus which is capable of removing airborne particles of material being dumped into the apparatus of a smaller particle size than capable with conventional filter bag dump stations.
A still further object of the present invention is to provide an improved filter bag dump station into which bulk comminuted materials may be dumped for further handling which is capable of capturing and recovering particles of sub-micron size.
Another object of the present invention is to provide an improved filter bag dump station capable of capturing and recovering airborne particles created when bulk comminuted materials are charged therein which complies with more stringent governmental dust control regulations.
A further object of the present invention is to provide an improved filter bag dump station capable of capturing airborne particles having a sub-micron particle size which is simple in construction, comparatively inexpensive to manufacture, highly effective in performance and convenient to service and maintain.
Other objects and advantages of the present invention will become more apparent to those persons having ordinary skill in the art to which the present invention pertains from the following description taken in conjunction with the accompanying drawings wherein:
REFERENCES:
patent: 1522111 (1925-01-01), Franck-Philipson
patent: 3944404 (1976-03-01), Andrasfalvy
patent: 4277260 (1981-07-01), Browning
patent: 4655804 (1987-04-01), Kercheval et al.
patent: 4889452 (1989-12-01), Heyl
patent: 5141706 (1992-08-01), Clark
patent: 5176726 (1993-01-01), Beavis
patent: 5230723 (1993-07-01), Travis et al.
patent: 5261934 (1993-11-01), Shutic et al.
patent: 5348572 (1994-09-01), Jelich et al.
patent: 5397371 (1995-03-01), Hough
Ambs Richard W.
Reiner Mary
Bushey C. Scott
Lalos & Keegan
The Young Industries, Inc.
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