JP7309490B2 - Flushing water treatment filter, flushing water treatment filter manufacturing method, flushing water treatment filter device, flushing water treatment filter system, and flushing water treatment method - Google Patents

Description

The present invention relates to a flushing water treatment filter, a flushing water treatment filter manufacturing method, a flushing water treatment filter device , a flushing water treatment filter system , and a flushing water treatment method .

For example, carbon steel pipes for piping are often used for piping for heat sources in air conditioning equipment. , sand, dust, etc. entered from the outside. Zinc is also contained in so-called white gas pipes in which the inner and outer surfaces of the pipe material are galvanized. In order to remove these, flushing is performed before actual operation.

Generally, flushing is performed by applying water to the piping system to be flushed and then cleaning the inside of the piping with a pump. It is strictly regulated by laws, the Water Pollution Control Act, and local ordinances. Therefore, flushing without drainage, which does not discharge flushing drainage after flushing to the outside, is attracting attention.

In view of this point, the applicant has previously proposed a flushing wastewater treatment method that can eliminate wastewater (Patent Document 1). In this treatment method, flushing waste water is coagulated with an inorganic coagulant in a coagulation tank, then coagulated with a polymer coagulant in a coagulation tank to separate and remove aggregates containing zinc, and then sludge is separated in a sedimentation tank. It's like

JP 2013-34987 A

The prior art described above is particularly effective in treating flushing water when galvanized steel pipes are flushed, and was useful for treating wastewater strictly regulated by laws and regulations. Since it is used, the device configuration becomes large, and there is room for improvement in this respect.

In this regard, from the viewpoint of miniaturizing the device structure, it is more advantageous to use a cartridge type filter. However, this type of filter on the market has a small collection amount per filter, and a large number of cartridge filters are required to treat the above-mentioned flushing water in the pipes, which increases costs and impracticality. Therefore, the current technology can only be used in places where the amount of water for purification is small or where there is little dirt.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a filter suitable for treating flushing water, thereby solving the above problems.

In order to achieve the above object, the present invention provides a filter that is housed in a container and used for treating flushing water in pipes, wherein fibers having a fiber diameter of 100 μm or less are compressed to have a porosity of 86 % to 92%, and is characterized by compressing a large number of cylindrical pellets in which the fibers are solidified with a water-insoluble paste .
Here, the porosity [%] is expressed by (1−volume occupied by fibers/volume of filter medium)×100.

As a result of the inventors of the present application analyzing the water in a large number of heat source pipes, they newly found that the quality of the water in these pipes is as follows.
Turbidity (indicates the degree of turbidity of water, compared with the turbidity (turbidity 1) of a uniformly dispersed suspension containing 1 mg of standard substances kaolin and formazin): 10 to 100 degrees SS (in water solid suspended matter with a particle size of 2 mm or less dispersed in the
Particle size of foreign matter: There are two peaks at diameters of about 10 to 70 μm and about 150 μm (see FIG. 12 described later).
The above data are not available in the published data.

Based on the results of this analysis, theoretical calculations for fiber filtration were performed.
Mechanisms by which particles are deposited on the fibers of the filter include the following mechanisms.
(1) obstruction, (2) inertial collision, (3) diffusion, (4) interaction between diffusion and obstruction, and (5) gravitational sedimentation. Based on these theoretical formulas, the filter fiber diameter and particle removal performance were calculated. . The calculation was performed with reference to books such as Aerosol Technology written by William C. Hines.

As a result of calculation, for example, when the filtration layer thickness is 600 mm, a fiber filter medium with a fiber diameter of 100 μm or less (more preferably 25 μm or less) and a porosity of 86% or more is used to perform so-called deep layer filtration. It was found that the size can be significantly reduced compared to the filtration method. However, it has been found that when the porosity of the fiber filter medium exceeds 92%, the amount of foreign matter retained rapidly decreases, shortening the service life. On the other hand, it has been found that even if the porosity of the fiber filter medium is less than 86%, the amount of foreign matter retained is reduced. Therefore, by setting the porosity of the fiber filter medium to 86% to 92% and performing depth filtration of the treated water, flushing wastewater can be treated more favorably than conventional surface filtration. And it lasts longer than similar commercially available cartridge filters. And it can be made smaller.

According to the knowledge of the inventors, as described above, the pipe after the pipe construction contains foreign matter such as welding slag and sealing tape generated by the pipe construction, shavings from the pipe material, sand and dust that have entered from the outside, In addition, in the case of so-called white gas pipes, zinc is also included, and when the particle size of these is analyzed, it is roughly divided into two particle size distributions with two peaks with a particle size of about 100 μm as a boundary. It has been found.
When treating flushing wastewater containing foreign matter with such a tendency with a filter, by configuring the filter according to the characteristics of these foreign matter, the retention (collection) amount can be secured and the service life can be shortened. was found to be able to extend

In view of this point, the fibers were made into a large number of cylindrical pellets, which were solidified with a non-water-soluble sizing agent, and compressed. That is, by compressing a large number of, for example, cylindrical pellets in which fibers are solidified with a water-insoluble sizing agent, the gaps between the pellets are not completely crushed, and there are two particle size distributions in the flushing drainage. foreign matter can be efficiently removed, clogging can be suppressed, and the service life can be extended. As long as a gap can be created between the pellets, the shape is not limited to a cylindrical shape, and may be a spherical shape, a tablet shape, a prismatic shape, a polygonal prismatic shape, or the like.

As a method of manufacturing each of these filters, for example, the fibers or pellets are housed in a compression container whose one end is closed, and from the opening on the other end side of the compression container, the shape of the opening is adjusted. A method for manufacturing a filter for treating flushing water can be proposed, characterized in that a predetermined pressure is applied to the fibers via a member. It is also possible to propose that the fibers or pellets are housed in a container closed at one end and a pressing body is pressed against the one end by a ball screw mechanism from the other end.
Here, the predetermined pressure is, for example, 50 kPa to 150 kPa, preferably 80 kPa to 100 kPa, more preferably 90 kPa.

According to these manufacturing methods, a filter with a porosity of 86% to 92% can be easily obtained.

Further, in a filter device in which the flushing water treatment filter is housed in a container, the container comprises a cylindrical main body and holding members provided at both ends of the main body and having a plurality of openings. , an inlet provided at one end and an outlet provided at the other end.

In addition, there is provided a filter device in which the flushing water treatment filter is housed in a container, wherein the container comprises a cylindrical main body, holding members provided at both ends of the main body, and holding members inside the holding members. a rectifying plate provided respectively; a spacer provided between the holding member and the rectifying plate; an inlet member provided on one end side through one of the holding members; and an outlet member provided on the other end side through the other holding member, wherein a plurality of openings are dispersedly formed in each of the rectifying plates, and each of the spacers allows water to flow. It is good also as a structure which has the space which secures.

For these filter devices, the inlet of treated water is set below the filter for treating flushing water in the container, and the outlet of treated water is set above the filter for treating flushing water in the container. may be configured. As a result, it is possible to prevent the surface of the filter from being clogged by the foreign matter collected by the filter by allowing the treated water to flow in a so-called upward direction.

In such a case, a resistor may be provided at a position between the inlet and the filter in the container so as to collide with the treated water supplied from the inlet. As a result, it is possible to suppress the clogging of the surface of the filter by allowing foreign matter with a relatively large particle size to fall due to the inertial collision of the treated water from the inlet against the resistor.

Further, the inner surface of the container may be cylindrical, and the inlet may be provided in the container so that the treated water supplied from the inlet forms a swirling flow. As a result, the surface of the filter can be washed by the ascending swirling flow, and clogging of the surface of the filter can be suppressed accordingly.

A filter system according to the present invention is a filter system for flushing water treatment for flushing the inside of a circulation pipe connected to equipment, wherein each of the above-described filter devices for flushing water treatment is connected in parallel with the circulation pipe. is characterized by

A filter system for flushing water treatment having such a configuration can be easily constructed at the site of flushing treatment, and since the filter device of the present invention is used, the size of the filter device itself can be reduced. Easy to carry in, install and remove.

In such a case, another filter device for filtering out foreign matter having a smaller particle size may be provided after the flushing water treatment filter device. As will be described later, this makes it possible to further improve the quality of the treated water, and to prevent clogging of the front-stage filter, thereby extending the life of the filter of the flushing water treatment filter device.
Further, flushing water treatment methods using the flushing water treatment filter, the flushing water treatment filter manufactured by the flushing water treatment filter manufacturing method, or the flushing water treatment filter system can also be proposed.

According to the present invention, the size of the apparatus can be reduced, and the apparatus can be used regardless of the amount of water to be treated and the amount of dirt.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing an outline of a system of a flushing water treatment filter system according to an embodiment; FIG. 2 is a vertical cross-sectional view of a flushing water treatment filter device used in the flushing water treatment filter system of FIG. 1 ; FIG. 3 is a perspective view of a rectifying plate employed in the flushing water treatment filter device of FIG. 2 ; FIG. 3 is a perspective view of a spacer employed in the flushing water treatment filter device of FIG. 2; It is a graph which shows the relationship between the porosity of a filter layer, and the SS retention amount. FIG. 4 is an explanatory view showing a method for manufacturing a filter for flushing water treatment according to an embodiment, (a) showing a state in which fibers are placed in a compression container, (b) showing a stage before pressing with a pressing member, and (c). Each shows a state in which pressure is applied by the pressing member. FIG. 4 is an explanatory view showing a manufacturing method of a flushing water treatment filter according to an embodiment using a ball screw mechanism; FIG. 7 is a perspective view showing how the filter manufactured by the manufacturing method of FIG. 6 is accommodated in the container of the filter device for flushing water treatment. FIG. 6 is a vertical cross-sectional view of a flushing water treatment filter device according to another embodiment in which the lower surface of the filter can be washed. FIG. 10 is a vertical cross-sectional view of a flushing water treatment filter device according to another embodiment having a baffle plate and capable of washing the lower surface of the filter. FIG. 10 is an explanatory view of a flushing water treatment filter device according to another embodiment capable of forming a swirling flow and washing the lower surface of the filter, where (a) is a longitudinal sectional view and (b) is a longitudinal sectional view of (a); It is a plane sectional view seen from the arrow. 4 is a graph showing the particle size distribution of foreign matter in flushing drainage at an actual construction site. FIG. 2 is a perspective view of a columnar pellet in which fibers are solidified with a water-insoluble glue. FIG. 14 is an explanatory view showing how the pellets in FIG. 13 are compressed by a ball screw mechanism; FIG. 5 is an explanatory diagram showing an outline of a system of a flushing water treatment filter system according to another embodiment; FIG. 4 is an explanatory diagram showing an outline of a system of a filter system for flushing water treatment in which another filter device is connected in series after the filter device for flushing water treatment;

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 shows an outline of a system of a flushing water treatment filter system 1 according to an embodiment. In this system, target devices are air handling units 2 and 3. These air handling units 2 and 3 are: It is connected to a chilled water maker 5 by a circulation pipe 4 . The cold water produced by the cold water maker 5 is supplied to the air handling units 2 and 3 by the pump 6, and the cold water whose temperature has been raised is returned to the cold water maker 5 again. A flushing water treatment filter device 10 according to the embodiment is provided in a pipe 4a connected in parallel to the downstream side of the chilled water maker 5 in the circulation pipe 4. As shown in FIG.

The flushing water treatment filter device 10 has a container 11 for accommodating a filter F, as shown in FIG. The container 11 has a cylindrical main body 11a and disk-shaped holding members 12 and 13 respectively provided at the upper and lower ends of the main body 11a. The inner diameter of the main body 11a is approximately 400 mm. Further, current plates 14 and 15 are provided inside the holding members 12 and 13, respectively. The straightening plates 14 and 15 are of the same shape and size, and as shown in FIG. 3, are made of, for example, punching metal, and are provided with a large number of openings 14a.

Spacers 16 and 17 shown in FIG. 4 are provided between the holding members 12 and 13 and the current plates 14 and 15, respectively. The outer diameters of the spacers 16 and 17 are set smaller than the outer diameters of the holding members 12 and 13 and the rectifying plates 14 and 15 described above. Accordingly, a space S is formed inside the spacers 16 and 17 to ensure water flow, and an outer space sa is formed outside the spacers 16 and 17 . Concave portions 16a and 17a are formed at one end portions of the spacers 16 and 17, that is, at the edge portions on the outer end side of the main body 11a. These concave portions 16a and 17a ensure water flow between the space S and the outer space sa, thereby suppressing the occurrence of stagnation and the like. More specifically, the recesses 16a and 17a allow the water to flow into the space S from a direction perpendicular to the inlet of the filter F to a direction crossing the inlet of the filter F. . This allows water to flow back and forth in the space partitioned by the spacers 16 and 17, thereby suppressing the occurrence of stagnation. Moreover, since the flow component heading toward the inlet of the filter F can be relaxed, the velocity (momentum) of the particles riding on that flow and heading toward the filter F decreases. can also be suppressed.
Although the spacers 16 and 17 are provided close to the container 11, they only need to support the straightening plates 14 and 15. The diameter of the spacers 16 and 17 should be about 70% of the diameter of the container 11 so as to support the central side. may In the illustrated example, the recesses 16a and 17a are provided adjacent to the holding members 12 and 13. For example, the recess 16a is positioned adjacent to the holding member 12 so that the filter In the vicinity of the inlet side of F (the inlet member 18 side described later), a flow in a direction intersecting with the filter F can be formed, which is preferable. In addition, since such an effect can be obtained only by forming a recess in the end of the spacer 16, processing is easier than drilling a through hole. The concave portion 16a may be formed at the end portion on the straightening plate 14 side, and a through hole may be formed in the peripheral surface portion of the spacer 16, of course.
When a known rectifying mechanism (rectifying plate, punching metal, honeycomb plate, fibers with a fiber diameter of 100 μm or more, etc.) is placed in the space S on the upstream side, for example, foreign matter with a relatively large particle size is dropped, and the surface of the filter F is reduced accordingly. blockage can be suppressed. That is, for example, if the filter device 10 for flushing water treatment is installed vertically with the inlet member 18 side facing down as shown in FIG. Of course, the same effect can be obtained not only in the vertical direction but also in the case where the flushing water treatment filter device 10 is installed obliquely.

A pipe-shaped inlet member 18 is provided below the container 11 so as to pass through the holding member 12 . The inlet member 18 constitutes the inlet of the flushing water treatment filter device 10 . A pipe-shaped outlet member 19 is provided above the container 11 so as to pass through the holding member 13 . The outlet member 19 constitutes the outlet of the flushing water treatment filter device 10 . These inlet member 18 and outlet member 19 are connected to the above-described pipe 4a.

The filter F is filled and housed between the rectifying plates 14 and 15 described above. In this embodiment, the filter F is packed over a length of about 600 mm in the axial direction. The filter F itself is made by compressing a fiber filter medium having a fiber diameter of 100 μm or less and a porosity of 86% to 92%, and is filled and housed between the straightening plates 14 and 15 .
The thickness of the filter F can be arbitrarily shortened by increasing the length of the spacers 16 and 17 or adding a separate spacer when the amount of water to be treated is small.

The flushing water treatment filter system 1 according to the embodiment has the configuration described above. The piping system is maintained by flowing water into the circulation piping 4 . As a result, the inside of the circulation pipe 4 is flushed.

That is, the treated water that has flowed into the inlet of the flushing water treatment filter device 10 from the pipe 4a passes through the space S from the inlet member 18 and flows into the filter F through the opening 14a of the straightening plate 14. is collected and filtered by the filter F, and the filtered treated water flows from the current plate 15 through the space S and from the outlet member 19 to the pipe 4a.

According to the inventors' investigation, when a fiber filter medium with a fiber diameter of 100 μm or less and a porosity of 86% to 92% is compressed and used, the porosity of the filter and the amount of SS retained, that is, turbidity (impurities) was as shown in the graph of FIG. The result of this experiment is that kaolin is dissolved in tap water, simulated treated water with a turbidity of 100 is treated with a filter F as treated water, the water is passed at a filtration rate of 24 m / h, and the treated water has a turbidity of 10 or more. Up to now, the amount of SS retained in the filter was investigated for each fiber filter medium having a different porosity.

According to this, when the porosity is 86% or more, the SS retention amount increases, reaches a peak at 88%, and when it becomes higher than that, the SS retention amount decreases after 92%. rice field. From this result, it was found that the porosity of 86% to 92% is suitable for the flushing treatment.
Moreover, in the flushing water treatment filter device 10 according to the embodiment, since the filter F is not planar but three-dimensionally structured, clogging is suppressed by depth filtration, and the service life of the filter F is lengthened. ing. That is, if surface filtration is performed with a planar filter, SS and the like will accumulate on the surface of the filter, causing clogging immediately. Since the SS and the like that have passed through the fibers are collected by the filter material of the filter F somewhere in the flow direction in the filter F, the entire volume of the filter material constituting the filter F can be filtered, and clogging can be suppressed. Therefore, the service life of the filter F is extended. Moreover, since the porosity is optimally set as described above, it is possible to prolong the life of the filter F and to suitably purify the treated water after the flushing process.

Of course, the filter F described above can be reused by washing. In this case, known detergents and surfactants used for this type of application may be used. Even without using a detergent, the filter can be sufficiently cleaned by repeating "washing and rinsing" several times. Alternatively, it may be stored in an existing laundry net or the like and washed in a washing machine. In this case, the determination of the end of cleaning is made based on the turbidity of the rinse water. That is, if the turbidity of the treated water is 10 degrees, the filter can be reused if the turbidity of the rinse water is 9 degrees or less, more preferably 5 degrees or less.
The fibers used for the filter medium of the filter F may be natural fibers or synthetic fibers.

Particles of 150 μm or more are easily separated by gravitational sedimentation. Therefore, the flushing water treatment filter device 10 should be configured to have an upward flow as shown in FIG. 2, and the portion before the treated water flows into the filter F, that is, the space S shown in FIG. 2 should be appropriately designed. , these particles larger than 150 μm can be separated and removed before entering the filter F.

Further, when the piping is a galvanized steel pipe, the corrosion rate of the steel pipe decreases when the pH of the water flowing through the pipe is adjusted to around pH 8-10. A pH range of 8-9 is considered particularly desirable. On the other hand, the water in the pipe is often tap water with a pH of 5.8 to 8.6. In view of such circumstances, the pH and amount of water in the pipes are determined in advance, and an ion exchange material having an anion exchange group is used according to the pH, so that the pH of the water in the pipes after purification is 8 to 10. Before and after, it is possible to purify the water in the pipe and suppress the corrosion of the pipe.

Further, the pH can be adjusted by using an ion-exchange material having an anion-exchange group, activated carbon fiber, or a fiber having an anion-exchange group as the fiber used for the filter medium of the filter F.

In order to eliminate the influence of residual chlorine in the water in the piping, for example, an ion-exchange material having anion-exchange groups and activated carbon fibers can be used.

If the water in the pipe contains organic matter and the generation of bacteria is expected, activated carbon fiber can be used to not only remove contaminants, but also adsorb and remove organic matter to suppress the generation of bacteria. can.

For manufacturing the filter F described above, for example, a method as shown in FIG. 6 can be proposed. That is, as shown in FIG. 6(a), first, the fiber FF is placed in a compression container 31 closed at one end, and then, as shown in FIG. 6, a compression jig 32 adapted to the shape of the opening is pressed from above the fiber FF, and then, as shown in FIG. A pressure of 150 kPa, preferably 80 kPa to 100 kPa, more preferably 90 kPa is applied. As a result, a filter F made of a fiber filter medium with a porosity of 86% to 92% can be obtained.

In addition, as shown in FIG. 7, a receiving plate 33a is fixed to the lower side in the compression container 31, and a pressing plate 33b is slidably arranged in the compression container 31 so as to face the receiving plate 33a. do. The nut member 34 is arranged above the pressing plate 33b, and the lower end of the screw 35 that is screwed with the nut member 34 is fixed to the receiving plate 33a. By rotating the nut member 34, the nut member 34 pushes the pressing plate 33b downward, compressing the fibers FF. Alternatively, a ball screw mechanism in which the screw 35 is passed through the receiving plate 33a may be employed.

By housing the filter F manufactured by such a manufacturing method in a container 11 as shown in FIG. A filter device 10 can be realized.

The filter device 10 for flushing water treatment according to the above-described embodiment was designed to process flushing with a so-called upward flow with the inlet set downward. It was confirmed that a foreign matter adhered to the lower surface and clogged it. By suppressing such clogging, the life of the filter F can be extended.

From this point of view, for example, the flushing water treatment filter device 41 shown in FIG. 9 can be proposed. That is, the holding member 12, the spacer 16, and the rectifying plate 14 are omitted, and a mesh receiving member 43 having a large number of openings is provided on the lower surface of the housing portion of the cylindrical container 42 for the filter F. Therefore, the filter F is housed on the receiving member 43 .

The lower side of the container 42 is tapered to form a tapered portion 44 . As a result, between the taper portion 44 and the receiving member 43, a flow space 44a for the treated water is formed. An inlet 45 for treated water is provided in this flow-through space 44a in a non-vertical direction, for example, horizontally.

According to the flushing water treatment filter device 41 having such a configuration, the treated water that has flowed into the flow space 44a from the inlet 45 becomes a water flow with a vector in the horizontal direction when passing through the filter F. Foreign matter on the surface of the filter F exposed through the opening of the receiving member 43 can be washed away. In addition, since the foreign matter B riding on the flow hits the inner wall surface of the main body 11a of the container 11 rather than the filter F, the filter F is less likely to be clogged with large foreign matter. The washed away foreign matter B falls to the bottom of the tapered portion 44 . This prevents the lower surface side of the filter F from being clogged with foreign matter. In order to extract the foreign matter B deposited on the bottom to the outside of the apparatus, the bottom may be appropriately provided with a discharge port.

Furthermore, in the example shown in FIG. 10, the circulation space 44a of the example shown in FIG. 9 is extended above the tapered portion 44, and baffle plates 47 and 48 as resistors are provided in this portion. . According to such a configuration, when the treated water containing foreign matter rises, it collides with the baffle plates 47 and 48, so the foreign matter B with a relatively large particle size falls by inertial collision. Therefore, it is possible to further prevent the lower surface side of the filter F from being clogged by foreign matter, as compared with the example shown in FIG. The baffle plates 47 and 48 are preferably arranged between the treated water inlet 45 and the receiving member 43 . It is preferable that the baffle plates 47 and 48 are provided on the inner surface of the container 42 and extend downward, that is, form a so-called "back". As a result, the flow avoiding the baffle plates 47 and 48 turns into a downward flow by the baffle plates 47 and 48, and heavy and comparatively large foreign matters are guided toward the bottom part by riding on the downward flow. become. The baffle plates 47 and 48 are not limited to the plate shape shown in the drawing, and may be formed, for example, in the shape of a funnel (the shape of a mortar with no bottom).

Further, in the flushing water treatment filter device 41 shown in FIG. 11(a), the flow space 44a of the example shown in FIG. , and the inlet 45 are connected tangentially to the inner surface of the container 42 in plan view.

According to the flushing water treatment filter device 41 having such a configuration, a swirling flow is formed above the flow space 44a, and a horizontal vector larger than that in the example shown in FIG. 9 is imparted to the flow of treated water. be. Therefore, foreign matter on the surface of the filter F can be washed away more than in the example of FIG. In addition, relatively large and heavy foreign matter is pressed against the inner surface of the tapered portion by the swirling flow, and thus is less likely to flow toward the filter F side. Thereby, the life of the filter F can be further extended.
Each configuration of the present embodiment described above can be configured by appropriately combining them. For example, the baffle plates 47 and 48 in FIG. 10 may be formed in a funnel shape to form a swirling flow around it.

By the way, as described above, it is known that foreign substances with different particle sizes are present in the wastewater after the so-called white gas pipe is flushed. As a result of the investigation, as shown in FIG. 12, there is a particle size distribution with a particle size of 100 μm as a boundary and a particle size distribution with a smaller particle size peak and a particle size larger than 100 μm. I found out. Small particle size foreign matter includes sand and the like, and large particle size foreign matter includes zinc dust and the like.

Therefore, when filtering foreign substances of different sizes, for example, by filtering with a so-called fine filter that removes foreign substances with fine particle diameters, both foreign substances can be removed. , it was found that the filter was clogged at a relatively early stage due to foreign matter having a large particle size.

In view of this phenomenon, for example, by using a pellet FP obtained by compressing fibers with a fiber diameter of 100 μm or less shown in FIG. It can remove foreign matter with a particle size of 100 mm, and can extend the service life of the fine filter. The porosity of the pellet FP itself is, for example, 92-94%.

That is, as shown in FIG. 14, a large number of pellets FP are delivered into a compression container 31, and these large numbers of pellets are compressed as they are to use a filter medium as a filter F, and the container 11 of the filter device 10 for flushing water treatment is used. Fill inside.

In the filter medium obtained by compressing the pellets FP in this way, the gaps between the pellets are not completely crushed, and the removal performance of the pellets FP itself can maintain the removal performance originally possessed by the pellets FP. Therefore, when the foreign matter in the flushing waste water divided into two particle size distributions as described above is filtered, the foreign matter of these two particle size groups can be efficiently and effectively removed. Therefore, it is possible to prevent a situation in which foreign matter with a large particle size is clogged and a foreign matter with a small particle size cannot be removed, or a situation in which a coarse filter medium cannot be used to collect foreign particles with a small particle size can be prevented. . And the life of the filter itself can be extended.

The flushing water treatment filter system 1 described above is applicable to the air handling units 2 and 3, but can also be applied to piping connected to the cooling tower 60 as shown in FIG. In such a case as well, for example, after appropriately operating a valve (not shown) so that water flows through the piping 4a side, water is allowed to flow into the circulation piping 4 to maintain the piping system.

The flushing water treatment filter system 1 described above uses the flushing water treatment filter device 10 in a single stage. As shown in FIG. 16, a filter having a finer filter than the filter F employed in the flushing water treatment filter device 10, that is, a filter that removes foreign matter having a smaller particle size, is provided on the downstream side of the flushing water treatment filter device 10. A device 61 may be installed. As a result, the water quality after the treatment is improved, and clogging of the filter F employed in the flushing water treatment filter device 10 can be suppressed, and the life of the filter F can be further extended. In this case as well, for example, after appropriately operating a valve (not shown) so that water flows through the piping 4a side, water is allowed to flow into the circulation piping 4 to maintain the piping system.
In each flushing water treatment filter system 1 described above, the flushing water treatment filter device 10 is installed in parallel with the circulation pipe 4 after appropriately operating a valve (not shown) so that water flows through the pipe 4a side. However, if various devices having pressure loss larger than that of the flushing water treatment filter device 10 are provided in the circulation pipe 4, they may be connected in parallel with the various devices without operating valves or the like.

INDUSTRIAL APPLICABILITY The present invention is useful for treating flushing waste water.

Reference Signs List 1 filter system for flushing water treatment 2, 3 air handling unit 4 circulation pipe 4a pipe 5 cold water maker 6 pump 10 filter device for flushing water treatment 11 container 11a main body 12, 13 holding member 14, 15 current plate 16, 17 spacer 18 Inlet member 19 Outlet member F Filter S Space

Claims (12)

A filter housed in a container and used for treating flushing water in piping,
A fiber filter medium having a porosity of 86% to 92% by compressing a large number of cylindrical pellets in which fibers having a fiber diameter of 100 μm or less are solidified with a water-insoluble sizing agent, for flushing water treatment. filter. A filter that is housed in a container and used for treating flushing water in pipes, wherein fibers having a fiber diameter of 100 μm or less are compressed to form a fiber filter medium having a porosity of 86% to 92%. processing filters,
Alternatively, it is a filter that is housed in a container and used to treat flushing water in pipes, and is made by compressing a large number of cylindrical pellets made by solidifying fibers with a fiber diameter of 100 μm or less with a water-insoluble glue. , a filter for flushing water treatment with a fiber filter medium having a porosity of 86% to 92% ,
A method of manufacturing a
housing the fibers or pellets in a compression container closed at one end;
A method for manufacturing a filter for flushing water treatment, wherein a predetermined pressure is applied to the fibers from an opening on the other end side of the compression container via a member that conforms to the shape of the opening. . A filter that is housed in a container and used for treating flushing water in pipes, wherein fibers having a fiber diameter of 100 μm or less are compressed to form a fiber filter medium having a porosity of 86% to 92%. A filter for flushing water treatment, or a fiber filter medium with a porosity of 86% to 92% by compressing a large number of cylindrical pellets in which fibers with a fiber diameter of 100 μm or less are solidified with a water-insoluble paste. ,
A method of manufacturing a
A method for manufacturing a filter for flushing water treatment, characterized by containing the fibers or pellets in a container for compression with one end closed, and pressing a pressing body against the one end side by means of a ball screw mechanism from the other end side. A filter that is housed in a container and used for treating flushing water in pipes, wherein fibers having a fiber diameter of 100 μm or less are compressed to form a fiber filter medium having a porosity of 86% to 92%. A filter for flushing water treatment, or a fiber filter medium with a porosity of 86% to 92% by compressing a large number of cylindrical pellets in which fibers with a fiber diameter of 100 μm or less are solidified with a water-insoluble paste. ,
is stored in a container,
The container is
a tubular body;
holding members respectively provided on both end sides of the main body;
rectifying plates respectively provided inside the holding members;
a spacer provided between the holding member and the current plate;
an inlet member provided on one end side through one of the holding members;
an exit member provided on the other end side through the other holding member among the holding members;
has
A plurality of openings are dispersedly formed in each of the rectifying plates,
Each spacer has a space for ensuring water flow,
A filter device for flushing water treatment, characterized in that: an inlet of treated water is set below the flushing water treatment filter in the container;
5. The flushing water treatment filter device according to claim 4 , wherein an outlet for treated water is set above said flushing water treatment filter in said container. 6. The flushing water treatment according to claim 5 , further comprising a resistor between said inlet and said filter for flushing water treatment in said container for colliding with treated water supplied from said inlet. filter device for The flushing according to claim 5 , wherein the inner surface of the container is cylindrical, and the inlet is provided in the container so that the treated water supplied from the inlet forms a swirling flow. Filter device for water treatment. A filter system for flushing water treatment for flushing the inside of a circulation pipe connected to equipment,
A filter system for flushing water treatment, wherein the filter device for flushing water treatment according to any one of claims 4 to 7 is connected in parallel with the circulation pipe. 9. The filter system for flushing water treatment according to claim 8 , further comprising another filter device for filtering foreign matter having a smaller particle size, provided in the subsequent stage of said filter device for flushing water treatment. A method for treating flushing water, wherein the filter for treating flushing water according to claim 1 is used. A flushing water treatment method using a flushing water treatment filter manufactured by the flushing water treatment filter manufacturing method according to claim 2 or 3. A flushing water treatment method using the flushing water treatment filter system according to claim 8 .

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