Water filter abstract
An effluent water filter device and method comprised of a cellular
grid packed with an activated carbon and enclosed in a housing.
The cellular grid is formed of a bacteria retarding material such
as stainless steel. The housing is formed of a frame having screens
on either side and locking end cap rings. The filter pack may be
in any shape either rectangular or cylindrical.
Water filter claims
What is claimed is:
1. An effluent filtering system comprising:
a pipe section;
a plurality of filter pack means serially positioned in said pipe;
said filter pack means comprising;
grid support means having a plurality of cells;
said cells being packed with granular carbon;
ring means receiving said grid support means packed with granular
a screen on each side of said ring means;
locking end caps on each side of said ring means locking said ring
means, screens and grid together thereby forming a filter pack assembly;
said grid and ring means being formed of bacterial growth retarding
securing means securing said plurality of filter pack means in
said pipe section;
connecting means for connecting said pipe section with said plurality
of filter pack means in an effluent pipe whereby effluent is caused
to flow through said series of filter pack means.
2. The effluent filtering system according to claim 1 in which
said means for securing said filter pack means in said pipe section
comprises a recess at one end and a cap ring secured to the opposite
3. The effluent filtering system according to claim 2 including
spacer means between each of said filter pack means.
4. An effluent water filtering method comprising;
forming a cellular grid from a bacteria retarding material;
packing the cells of said cellular grid with carbon;
enclosing said packed cellular grid in a screened housing;
positioning a plurality of said carbon packed cellular grids in
the path of water to be filtered.
5. The effluent filtering method according to claim 4 comprising
forming said cellular grid from a bacteria retarding stainless steel.
6. The effluent filtering method according to claim 5 comprising
packing said cellular grid with an activated carbon.
7. The effluent filtering method according to claim 4 comprising;
positioning a plurality of carbon packed grids in series in a section
installing said section of pipe in a water supply pipeline.
Water filter description
This invention relates to effluent water filtering systems and
more particularly relates to an effluent water filter device, which
is easy to install and maintain.
In present effluent water filtering systems, most suspended solids,
bacteria and other organisms are filtered out by passing the water
through a bed of sand sometimes layered on top of pulverized charcoal
or through a matrix of fibrous materials. Some of these types of
filters are known as "slow sand filters" and may range
in size from a fraction of an acre in some small plants to several
acres in large plants. The water is passed through these systems
at a relatively low rate. The sand used in these filter systems
is usually a fine sand, which clogs with use and thin layers of
the dirty sand must be scrapped from the filter periodically to
maintain capacity. The disadvantages of these types of filter systems,
are the large area required in addition to the labor needed to clean
the filters and handle the filter sand.
More often, the filtering systems presently in use are rapid sand
filters, which is made possible by coagulation and sedimentation
before filtration to remove the heaviest part of the load. These
systems use a fairly coarse sand and include facilities for backwashing
the filter to keep the bed clean. The filter beds are generally
small ranging from 150 square feet in some small plants to 1500
square feet in larger plants. The filters themselves consist of
a layer of sand or occasionally crushed anthracite coal up to two
(2) feet deep resting on graded layers of gravel above an underdrain
system. Maintenance of these systems is difficult and requires a
great deal of labor. These type filters are generally built in concrete
boxes or open tanks of wood and steel. The flow through the filter
is generally by gravity or the water may be forced through the sand
under pressure by pumping. However, excessive pressure frequently
causes turbidity and bacteria may appear in the discharge water.
Thus, pressure filters are not favored because they are difficult
to inspect and keep in good order, thus, open gravity filters are
favored for public water supplies. Even these, however, do not always
filter out some of the harmful bacteria, carcinogens and cancer-causing
The purpose of the present invention is to provide an effluent
water filtering device and system which is efficient and easily
In the filtering device of the present invention, a cellular grid
is formed, which is then packed with an activated carbon. The packed
cellular grid is then installed in a housing formed of a frame having
screens at either end secured by locking end cap rings. The construction
of the filter devices may be in any shape and size providing a unitary
filtering system which can be easily removed, replaced and serviced
The effluent water filter device described utilizes a stainless
steel grid, which will retard formation of bacteria. The activated
charcoal in the grid will remove harmful bacteria and carcinogens
or cancer-causing agents or chemicals from the water. The water
filter device of the present invention may be used but is not limited
to conventional industrial water treatment plants. It is preferably
used in final filtration process and may be used in aquaduct or
The packed cellular grid and housing are designed to make one filter
device or pack. By proper positioning a plurality of these filter
devices or packs, the filtering system may be easily expanded in
length and size for various purposes. To provide a plurality of
series installed filter packs a pipe section will be constructed
having a shoulder or recess against which the filter packs will
seat. This will generally hold the filter packs in position for
flow through of water to be filtered. At the rear of the pipe section,
a lock ring will clamp the plurality of series installed filter
packs in the pipe section. Thus, the pipe section may be installed
or removed from a water supply aquaduct or pipe line as desired.
The filter packs for the pipe are cylindrical in design and easily
slide into or out of the pipe for simplifying maintenance. As in
prior filtering systems, the filter packs can be regenerated by
simply back flushing the system or removing and replacing individual
filter packs in the pipe. Thus, the device and system provided is
readily reusable except in extreme cases where the activated carbon
may be too saturated. In this event, the entire filter pack can
be removed and pressure-steamed before it may be reused.
It is one object of the present invention to provide an effluent
water filtering device, which can be easily removed and exchanged.
Another object of the present invention is to provide an effluent
filtering device, which can be easily removed and exchanged.
Still another object of the present invention is to provide an
effluent filtering device constructed of a cellular grid material
which retards bacterial growth.
These and other objects of the invention become apparent from the
following detailed description when considered in conjunction with
the accompanying drawings wherein like reference numbers identify
like parts throughout.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the construction of an effluent water filtering
device according to the invention.
FIG. 2 shows the effluent water filtering device constructed for
use in a water supply system.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The water filtering device of the present invention consists of
a cellular grid 10 which is packed or filled with an activated carbon
material 12 enclosed in a housing. The housing is formed of a cylindrical
ring or frame 14 having screens 16 and 18 on either end locked together
by locking rings 20 and 22.
Preferably the cellular grid 10 is comprised of a bacteria-retarding
stainless steel material such as stainless steel type 304 A.S.T.M.
specification A-213. The frame 14 would also be constructed of this
The activated carbon 12 may be made to many different pure structures
for a variety of water conditions. It may be a biologically activated
carbon in a crystalline granular form desirable because of its efficient
filtration properties. The screens 16 and 18 would be sufficient
to allow a free flow of water through the filter while preventing
the activated carbon 12 from washing out of the filter pack. While
the filtering device or pack illustrated in FIG. 1 is cylindrical
in shape, it can be rectangular or any shape desired. Likewise,
the cellular grid 10 can be a circular, diamond or square-celled
The use of the effluent water filtering device of the present invention
is illustrated in FIG. 1. In FIG. 2 a section of pipe 24 may be
provided in any desired diameter according to the water supply the
system is to be used with. Installed in the pipe are effluent water
filtering devices or packs 26 according to the invention, which
are stacked or in series to provide maximum filtration. The pipe
24 in order to lock the filter packs within the pipe section, is
provided with a recess or step 28 against which the furthest pack
30 seats. Additional packs would be loaded into the pipe section
24 separated by spacers 32. The entire assembly is then closed and
sealed by a threaded locking ring 34. This entire filtering system
may now be installed into the path of a water supply pipeline to
provide effective filtering and purification of water.
The size of the grids 10 and density of the activated carbon 12
packed into the grids would depend upon the amount of flow desired.
The cellular grids would be loosely filled with the activated carbon
in order to minimize restriction to flow while at the same time
providing maximum filtration.
Obviously, many modifications and variations of this invention
are possible in the light of the above teachings. It is therefore
to be understood that the full scope of the invention is not limited
to the details disclosed herein, but only by the appended claims
and may be practiced otherwise than as specifically described.