Gas separation – Two or more separators – Spaced for parallel flow of gas
Reexamination Certificate
1999-06-01
2001-02-06
Smith, Duane S. (Department: 1724)
Gas separation
Two or more separators
Spaced for parallel flow of gas
C055S493000, C055S502000, C055S508000, C055S523000
Reexamination Certificate
active
06183529
ABSTRACT:
TECHNICAL FIELD
The invention relates to a filter assembly for use with a high temperature gas filtration system having a support member, and more particularly to a filter assembly which can be quickly and easily installed on and removed from the support member.
BACKGROUND ART
Many industrial processes such as oil refining and polymer production require filtration of high temperature, high pressure gas streams to separate particles such as catalyst particles, waste particles, or other solids from the gas streams. A prior high temperature gas filtration system includes a vessel and a support plate or tube sheet which divides the vessel into upper and lower chambers. The tube sheet has a plurality of threaded apertures which receive a plurality of threaded filter elements for filtering a gas stream as it passes from one chamber to the other. One problem associated with such a filtration system is that gulling or fusing of the filter elements to the tube sheet may occur along the threaded surfaces under certain circumstances. As a result, the filter elements may be difficult to remove from the tube sheet and may be damaged during such removal.
U.S. Pat. No. 4,960,448 to Zievers discloses another high temperature gas filtration system including a plurality of filter elements and a support plate having a plurality of apertures for receiving the filter elements, each aperture being surrounded by a ring extending upwardly from the support plate. Each filter element is connectable to the support plate using a pair of rods which extend through aligned holes in a respective ring and across the top of the filter element in abutment therewith. The rods, however, are typically difficult to install and remove, and cannot be adjusted to vary the compressive force exerted on a respective filter element to compensate for such things as gasket or seal yield.
Accordingly, a need exists for a filter assembly for use with a high temperature gas filtration system having a support member, wherein the filter assembly can be quickly and easily connected to and removed from the support member.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved filter assembly which can be quickly and easily connected to and removed from a support member.
It is another object of the invention to provide a gas filtration system including such an improved filter assembly.
A more specific object of the invention is to provide an improved filter assembly including a threadless adapter adapted to be connected to the support member, and a threadless filter element removably connected to the adapter.
Another more specific object of the invention is to provide an improved filter assembly in which the adapter and the filter element have flange portions disposed adjacent to each other.
In carrying out these and other objects, features and advantages of the invention, there is provided a filter assembly for use with a gas filtration system for separating particles from a high temperature gas stream, the gas filtration system having a support member. The filter assembly comprises an adapter adapted to be connected to the support member and having an opening extending therethrough. A filter element is removably connected to the adapter and extends through the opening for separating the particles from the gas stream. A removable clamping device engages the adapter and the filter element for removably connecting the filter element to the adapter.
The present invention overcomes the above noted shortcomings of the prior art by providing an improved filter assembly including a filter element and a clamping device which enables the filter element to be quickly connected to and removed from a support member. Furthermore, the clamping device is preferably adjustable for varying the clamping forces exerted on the filter element.
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patent: 4960448 (1990-10-01), Zievers
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Janikowski Zbigniew M.
Krause Waldemar H.
Musso José A.
GKN Sinter Metals, Inc.
Smith Duane S.
Woodcock Washburn Kurtz Mackiewicz & Norris
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