JP5005619B2 - Recycling of filter media - Google Patents

Description

The present invention relates to a recycling method of Filtration timber, and particularly relates to a method of reusing regenerated filtration media to be utilized in a filtration apparatus using a filter medium made of basalt filament.

  Conventionally, a sand filtration device {coagulation sedimentation sand filtration device (for example, see Patent Document 1 etc.) or a coagulation pressure floating sand filtration device, etc.} is used for water purification treatment of factory effluent and sewage and water quality purification treatment of lakes and rivers. Is generally performed.

  However, sand filter equipment is not only costly due to restrictions in terms of cost and sales handling source when procuring filter media, etc., but clogging of filter media tends to occur in a short time during processing. The backwash process must be performed frequently and has the disadvantage of low filtration efficiency.

  In addition, a large amount of backwash water is required for backwash treatment, and the large amount of backwash water used for backwash treatment cannot be discharged as it is, so reprocessing is required. Has the disadvantage that it takes time and effort.

JP 2001-224907 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for reusing a filter medium that is easy to recycle a filter medium used in a filtering device having high filtration efficiency.

  The present invention for solving the above problems has the following configuration.

1. In the recycling method of the filtering material used in the filtering device that performs filtration by passing the raw water as filtered water through the filtering material disposed in the water passage,
The filter medium is
Permanent wave filter media body consisting of an accumulation of basalt long fibers processed into a permanent wave shape and accumulated in a lump,
A filter medium-covered mesh body capable of retaining the form of the permanent wave filter medium body by processing a basalt long fiber into a net shape and forming a shape that covers at least a part of the surface of the permanent wave filter medium body,
And is used in a state where the permanent wave filter medium main body is fixed in the filter medium-covered mesh body ,
A permanent wave filter medium body to which an object to be filtered such as a contaminant is attached to the filter apparatus is removed from the filter apparatus and subjected to a strong heat treatment in a state of being internally fixed in the filter material-covered mesh, and the object to be filtered burning, after removal, recycling method of filtering material, characterized in re-arranged to Rukoto to the filtration device.

2. The filter material-covered mesh body and the permanent wave filter material body fixed internally in the filter material-covered mesh body are bound and fixed by a string-like body formed by processing basalt long fibers into a string shape. 2. The method for recycling the filter material according to 1 above.

3 . The method for reclaiming a filter medium according to claim 1 or 2 , wherein a filling rate of the filter medium (volume ratio in a portion where the filter medium is disposed) is 40 to 60%.

According to the first aspect of the present invention, it is possible to provide a filter material recycling method that facilitates the recycling of the filter material.

In particular, when reclaiming filtration media whose filtration performance has deteriorated due to clogging by the filtration object such as pollutants, the filtration object such as pollutants is reduced or removed by strongly heat-treating the permanent wave filtration material body. Is possible. Accordingly, even when backwashing is performed, the amount of backwashing water used can be significantly reduced as compared with the conventional sandfiltration backwashing.

In particular, strong heat treatment is possible in a state in which the shape of the permanent wave filter material body is prevented from being deformed.

The filtration device to which the present invention is applied has high filtration efficiency.
In particular, by using a permanent wave filter medium body made of basalt long fiber , which is a flexible and highly rigid material, into a permanent wave shape, the filter medium placement space in the filter device is flexible and has fine fiber voids. from in being able to uniformly fill, clogging of the filtering material because partial raw water is occluded in the treated water in the filtration media by the filtrate is filtration by avoiding freely performed of contaminants such as Compared with conventional sand filtration, the frequency of backwashing treatment is much lower, so that more efficient filtration treatment can be performed.

In addition, the permanent wave filter medium main body processed into a permanent wave shape is internally fixed to the filter medium-covered mesh body, so that the permanent wave filter medium main body composed of an aggregate of basalt long fibers processed into a permanent wave shape is collected. The collapse of the form is suppressed, and the form can be maintained.

  Furthermore, by forming the filter medium-covered mesh body with basalt long fibers of the same quality as the permanent wave filter medium body, the filter medium-covered network body has no gap on the inner peripheral surface of the sheath tube or the like where the filter medium is disposed. Since it adheres closely, it can be filled with a net-like body in the said arrangement | positioning site | part without a clearance gap, Therefore The flow of raw | natural water is equalized and high filtration processing ability can be obtained. That is, the raw water preferentially passes through the gap formed between the inner peripheral surface of the sheath and the pipe and the stainless steel mesh body as in the case where the filter medium body that is generally used is covered with a stainless steel mesh body. Can prevent incomplete filtration.

According to the second aspect of the present invention, the shape of the permanent wave filter medium body composed of an aggregate obtained by accumulating basalt long fibers processed into a permanent wave shape is further suppressed, and the retainability of the shape is further improved. To do.

According to the third aspect of the present invention, the in-pipe pressure can be maintained within an appropriate range and the filtration performance can be exhibited.

Hereinafter, the engagement Ru Filtration Material recycling methods to the present invention, the present invention will be described in detail with reference to the accompanying drawings showing an example of the applied filtration device.

Figure 1 is a schematic sectional view showing an example of a filtration device to which the present invention is applied, FIG 2 is spread exploded perspective view showing an example of a filtering material for use in filtration apparatus of FIG. 1, FIG. 3 is other filtering material perspective view showing an example, FIG. 4 is a schematic explanatory view showing an embodiment of a recycling method of filtering material according to the present invention.

The filtration apparatus to which the present invention is applied performs filtration by passing raw water as filtered water through a filter medium disposed in a water passage. As shown in FIG. The filter medium 3 is disposed in the sheath 2 of the apparatus 1, and the raw water, which is the treated water flowing from the raw water inflow pipe 4, is passed through the filter medium 3 to filter contaminants in the raw water. The filtered water is discharged from the filtered water discharge pipe 5.

  As shown in FIGS. 1 and 2, the filter medium 3 used in the filter device 1 has a permanent wave filter medium body 31 and a filter medium-covered mesh body 32, and the filter medium-covered mesh body 32 has a permanent wave. In this configuration, the filter medium main body 31 is fixed in the interior.

  The permanent wave filter material main body 31 is formed of an accumulation body obtained by processing heat-resistant and incombustible long fiber materials into a permanent wave shape and accumulating in a lump shape. In the present embodiment, the permanent wave filter material body 31 of the filter device 1 is an arrangement place of the filter material 3. Since the sheath pipe 2 is a cylindrical tube, it is formed in a columnar shape that can be uniformly filled in the cylindrical tube.

  The filter material-covered mesh body 32 is formed by processing a long fiber material having the same quality as the permanent wave filter material body 31 into a mesh shape and covering at least a part of the surface of the permanent wave filter material body 31. It is the structure which carries out interior fixation in the state which enabled holding | maintenance of the form of the filter medium main body 31. FIG. In the present embodiment, the permanent wave filter medium main body 31 having a cylindrical shape is formed in a cylindrical shape covering the entire side surface except the upper and lower surfaces.

  The permanent wave filter material main body 31 and the filter material-covered mesh body 32 are preferably bound together in order to make the fixation at the time of fixing the interior more firm. As a preferable binding means, the heat-resistant and non-flammable material is used. As shown in FIG. 3, it is possible to use a string-like body 33 formed by processing a long fiber material of the same quality as the long fiber material into a string shape. As a specific method for binding and fixing, as shown in FIG. 3, a plurality of (six in this embodiment) string-like bodies 33 are passed through the interior of the permanent wave filter material body 31, and both ends are filtered. For example, the material-covered mesh 32 may be tied and fixed to the mesh.

The heat-resistant and non-combustible long fiber material constituting each of the permanent wave filter material main body 31, the filter material-covered mesh body 32, and the string-like body 33 is a basalt long fiber . The basalt long fiber has a wide usable temperature range of −260 to 650 ° C., and thus can be used for filtration under various conditions, and is flexible and highly rigid. In addition, since it has a high heat resistance and is nonflammable (sintering temperature is 1000 ° C. or higher), there is no problem in the strong heat treatment during regeneration. During the strong heat treatment, only the matter to be filtered such as pollutants is burned to reduce the weight. Or can be removed.

  The filter medium 3 having the permanent wave filter medium main body 31 and the filter medium-covered mesh body 32 has a filling rate (arrangement of the filter medium 3 in the sheath portion 2 in this embodiment). The volume ratio in the portion is preferably 40 to 60%. By setting the filling rate to 40 to 60%, the pressure in the tube can be maintained in an appropriate range and the filtration performance can be exhibited.

Then any time using the Filtration device 1 that have a above-described structure, or a period of time, the filtrate of such contaminants in the permanent waving filtration material body 31 of the filter material 3 by performing filtering processing It will adhere and accumulate. Therefore, after an arbitrary period or a certain period of time has elapsed, the filter medium 3 is removed from the sheath pipe 2 of the filter device 1 and subjected to strong heat treatment to burn the filtered material and reduce or remove it. The filter medium 3 can be reused by rearranging it in the sheath 2 of the filter device 1.

  The heat treatment of the filter medium 3 is performed by a strong heat treatment means such as a combustion furnace. The strong heat treatment in the combustion furnace is preferably performed in a state where at least one filter medium 3 is stored in the combustion furnace 9 as shown in FIG. In addition, the strong heat treatment temperature is appropriately set according to the type of an object to be filtered such as a contaminant.

Strong heat treatment of the filter material 3, after removal of the filtered material 3 from the sheath pipe 2 of the filter 1, while the strength of the state of the path over imitating cement wave filtering material body 31 and interior fixed in the filtering material covering meshwork 32 Heat treatment . It is more preferable to perform a strong heat treatment with the string-like body 33 being bound and fixed. From the accumulated body in which the long fiber material processed into a permanent wave shape is accumulated in a lump by keeping it fixed in the filter medium-covered mesh body 32 and further in a state of being bound and fixed by the string 33. The permanent wave filter medium body 31 is further prevented from being deformed, and strong heat treatment can be performed while the shape is maintained.

  As mentioned above, although the recycling method of the filter medium which concerns on this invention was demonstrated based on the Example, this invention is not limited to the said Example, Other aspects can also be taken within the scope of the present invention.

In the above SL embodiment, permanent wave filtering material body 31 of the filter member 3 is formed in a cylindrical shape, the filtering material covering meshwork 32 which covers the permanent wave filtering material body 31 has a configuration which is formed in a cylindrical shape However, this invention is not limited to this, A various shape can be taken according to the shape of the sheath of the filtration apparatus 1 which is the arrangement | positioning location of the filter medium 3, and the piping 2. As shown in FIG. For example, when the sheath pipe 2 is a square pipe, the permanent wave filter material body 31 is formed in a prismatic shape, and the filter material-covered mesh body 32 is formed in a rectangular tube shape.

Moreover, in the said Example, although the filter material covering net-like body 32 was the structure which coat | covers the whole side surface except the upper surface and lower surface of the permanent wave filter material main body 31 which comprises a column shape, this invention is the structure of the permanent wave filter material main body 31. It may be a coating capable of maintaining the form, and may be configured to cover only a part of the side surface, or may be configured to cover the upper surface and / or the lower surface excluding the side surface, or the upper surface / lower surface. And the structure which coat | covers the whole surface which is the whole side surface may be sufficient.

Schematic configuration sectional view showing an example of a filtration device to which the present invention is applied 1 is a diffusion exploded perspective view showing an example of a filter medium used in the filtration device of FIG. The perspective view which shows the other example of a filter medium Schematic explanatory drawing which shows one Example of the recycling method of the filter medium which concerns on this invention

DESCRIPTION OF SYMBOLS 1 Filtration apparatus 2 Sheath piping 3 Filter material 31 Permanent wave filter material main body 32 Filter material covering net-like body 33 String body 4 Raw water inflow pipe 5 Filtration processed water discharge pipe 6 Solenoid valve 7 Aeration backwash pipe 8 Backwash water discharge tube

Claims (3)

In the recycling method of the filtering material used in the filtering device that performs filtration by passing the raw water as filtered water through the filtering material disposed in the water passage,
The filter medium is
Permanent wave filter media body consisting of an accumulation of basalt long fibers processed into a permanent wave shape and accumulated in a lump,
A filter medium-covered mesh body capable of retaining the form of the permanent wave filter medium body by processing a basalt long fiber into a net shape and forming a shape that covers at least a part of the surface of the permanent wave filter medium body,
And is used in a state where the permanent wave filter medium main body is fixed in the filter medium-covered mesh body ,
A permanent wave filter medium body to which an object to be filtered such as a contaminant is attached to the filter apparatus is removed from the filter apparatus and subjected to a strong heat treatment in a state of being internally fixed in the filter material-covered mesh, and the object to be filtered burning, after removal, recycling method of filtering material, characterized in re-arranged to Rukoto to the filtration device. The filter material-covered mesh body and the permanent wave filter material body fixed internally in the filter material-covered mesh body are bound and fixed by a string-like body formed by processing basalt long fibers into a string shape. The recycling method of the filter medium according to claim 1, wherein the filter medium is recycled . The method for reclaiming a filter medium according to claim 1 or 2 , wherein a filling rate of the filter medium (volume ratio in a portion where the filter medium is disposed) is 40 to 60%.

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