JP2018015675A - Layer module and multilayer filter column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayer filter tower which forms a plurality of filter layers by different filter particles with a high degree of freedom in selecting the filter particles.SOLUTION: A layer module structures a multilayer filter tower, and includes a filter column for storing filter particles. The filter column includes a cylindrical side frame arranged in the multilayer filter tower approximately coaxially, and a porous bottom body which covers a lower surface side of the side frame. The filter column further includes a porous lid body structured so as to engage with the side frame to cover an upper surface side of the side frame preferably. The filter particles stored in the filter column are further included preferably. An outer edge part of the porous bottom body is bent to a side surface of the side frame, and the porous bottom body is preferably fastened by winding a belt on it. It is more preferable that a cylindrical external column, which structures a part of an outer wall of the multilayer filter tower and in which the filter column is arranged, be further provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a layer module and a multi-layer filtration tower.

  From the viewpoint of environmental conservation, it is necessary to discard the oil / water mixture containing oil and turbidity generated in oil fields and factories after reducing the amount of oil and turbidity to a certain value or less. There are gravity separation, distillation separation, chemical separation, etc. as a method for separating and removing oil and turbidity from the liquid to be treated. As a method for separating and removing oil and turbidity at a low cost, a filtration tower enclosing filtration particles is used. There is a method to use. In such a filtration tower, oil and turbidity are filtered by a filtration layer formed by enclosed filtration particles.

  In the filtration tower, oil or turbidity adheres to the filtration particles, so that separation of the turbidity becomes insufficient or the amount of water flow decreases. For this reason, a method is known in which filtration particles are locally blocked by clogging the filtration tower with a plurality of types of filtration particles so that the gap between the filtration particles increases toward the upstream side. (For example, refer to JP2013-248563A).

  In addition, when the filter particles are clogged in the filter tower, or in order to prevent clogging, the wash water is passed through the filter tower in the direction opposite to the normal water flow direction to adhere to the filter particles. A washing process for removing the oil and turbidity, so-called back washing is performed.

  In the above publication, in order to perform the backwashing efficiently, the filtration particles having different specific gravities are filled, and these particles are agitated at the time of backwashing so that they can be washed with each other. It has been proposed to

  In the multi-layer filtration tower of the above publication, at the end of backwashing, the filtration particles are divided into layers according to the difference in the sedimentation speed of the filtration particles. For this reason, the sedimentation rate of the filtration particles in which the gaps between the particles are large must be smaller than the sedimentation rate of the filtration particles in which the gaps between the particles are small. Therefore, the above publication proposes using a resin fiber filter medium having a small specific gravity as the filter particles forming the upper layer and using a porous ceramic filter medium having a large specific gravity as the filter particles forming the lower layer.

  As described above, in the multi-layer filtration tower, it is necessary to increase the gap between the particles toward the upper side. However, in general, the sedimentation rate of granular materials increases as the particle diameter increases. Accordingly, when trying to stratify due to the difference in sedimentation speed, the gap between particles tends to be larger in the lower layer, and there is a possibility that fine turbidity or the like cannot be captured in the lower layer. For this reason, in the structure of the said gazette, the difference of the sedimentation rate is ensured by the combination of the resin fiber filter medium and the porous ceramics filter medium.

JP 2013-248563 A

  However, even in the multi-layer filtration tower described in the above publication, clogging may not be eliminated even by backwashing due to continuous use. Then, it is necessary to take out all the filtration particles from the filtration tower and fill the filtration tower with new filtration particles. For this reason, the multi-layer filtration tower described in the above publication is not efficient in maintenance work.

  In general, it is desirable for the filtration tower to optimize the material and particle diameter of the filtration particles forming each filtration layer according to the type and amount of oil, turbidity, etc. contained in the liquid to be treated. However, in the multi-layer filtration tower described in the above publication, the combination of filtration particles that can be used is limited because the layers are divided according to the difference in sedimentation speed.

  The present invention has been made based on the above-described circumstances, and can provide a multi-layer filtration tower having a high maintenance work efficiency and a washing module and a multi-layer filtration tower having a high degree of freedom in selecting filter particles. The task is to do.

  One aspect of the present invention made to solve the above problems is a layer module constituting a multilayer filtration tower, comprising a filtration column containing filtration particles, and the filtration column is disposed in the multilayer filtration tower. A layer module having a cylindrical side frame installed substantially coaxially with a porous bottom body covering the lower surface side of the side frame.

  By using the layer module according to one embodiment of the present invention, it is possible to provide a multi-layer filtration tower with high maintenance work efficiency and a high degree of freedom in selecting filtration particles.

FIG. 1 is a schematic cross-sectional view showing a multi-layer filtration tower according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing details of the layer module of FIG.

[Description of Embodiment of the Present Invention]
One aspect of the present invention is a layer module constituting a multi-layer filtration tower, comprising a filtration column containing filtration particles, and the filtration column is installed in a substantially cylindrical shape in the multi-layer filtration tower. This is a layer module having a side frame and a porous bottom covering the lower surface side of the side frame.

  The layer module has a cylindrical side frame and a porous bottom so that a liquid to be treated can flow therethrough and can include a filtration column. For this reason, the filtration particles are accommodated in the filtration column and installed in the filtration tower, so that each of them forms an independent filtration layer, and the liquid to be treated can be filtered and discharged from the porous bottom body. The layer module can be used to configure various multi-layer filtration towers according to the liquid to be treated, for example, by combination with other layer modules, selection of filtration particles to be accommodated, etc. high. In particular, the layer module prevents the filtered particles from flowing out by the porous bottom body, and the inner filtered particles do not mix with the filtered particles stored in the other layer modules. Any filtration particle can be used without being affected by the type of filtration particle. For this reason, the freedom degree of selection of filtration particles is large. In addition, when it becomes necessary to maintain the multi-layer filtration tower due to clogging of filtration particles or the like, the maintenance work can be performed by removing the layer module from the multi-layer filtration tower. The maintenance work efficiency can be improved.

  The filtration column may further include a porous lid configured to be engageable with the side frame so as to cover the upper surface side of the side frame. Thus, by having the porous cover body configured to be engageable with the side frame so as to cover the upper surface side of the side frame, it is possible to prevent the filtered particles from flowing out during backwashing or the like.

  It is good to further provide the filtration particles stored in the filtration column. Thus, by providing the filtration particle accommodated in the said filtration column previously, handling of filtration particle | grains becomes easy and a multilayer filtration tower can be comprised comparatively easily.

  The porous bottom body may be fastened by bending the outer edge portion to the side surface of the side frame and winding the belt from above. As described above, the porous bottom body is securely fastened to the side frame by bending the outer edge portion to the side surface of the side frame and fastening the belt from above. Since it is fixed to, it becomes easier to handle.

  It is good to further comprise the cylindrical external column which comprises a part of outer wall of the said multilayer filtration tower, and the said filtration column is installed. In this way, the multi-layer filtration tower that constitutes a part of the outer wall of the multi-layer filtration tower and includes the cylindrical external column in which the filtration column is installed is optimal for accommodating the filtration column to be used. Can be configured easily.

  It is good to further provide the reinforcement member which is arrange | positioned inside the said external column and supports the bottom face of a filtration column. Thus, by providing the reinforcing member that is disposed inside the outer column and supports the bottom surface of the filtration column, it is possible to reliably prevent the porous bottom body from being broken.

  The multilayer filtration tower according to another aspect of the present invention is a multilayer filtration tower in which a plurality of the layer modules are installed substantially coaxially.

  Since the plurality of layer modules are installed substantially coaxially, the multi-layer filtration tower is easy to assemble, and the filtration particles can be exchanged together with the layer modules. Moreover, since filtration particle | grains are enclosed for every said layer module, the kind of filtration particle | grains enclosed with each layer module can be selected freely.

  Here, “substantially coaxial” means that the deviation of the central axis is 10% or less, preferably 5% or less, of the average inner diameter of the multi-layer filtration tower.

[Details of the embodiment of the present invention]
Hereinafter, embodiments of a multi-layer filtration tower according to the present invention will be described in detail with reference to the drawings.

  The multi-layer filtration tower of FIG. 1 includes a plurality of layer modules 1 arranged substantially coaxially in a vertical direction, an upper end module 2 installed on the uppermost layer module 1, and a lowermost layer module 1. And a lower end module 3 installed underneath.

<Layer module>
As shown in detail in FIG. 2, the layer module 1 includes a filtration particle 4, a filtration column 5 that accommodates the filtration particle 4, and a part of the outer wall of the multilayer filtration tower, and the filtration column 5 is disposed inside. And a cylindrical outer column 6 installed coaxially.

(Filtered particles)
The filtration particle 4 is a filter medium that forms a filtration layer for filtering the liquid to be treated in the filtration column 5. As the filtration particles 4, known filtration particles can be used, for example, natural sand, inorganic particles, ceramics, polymers (polymer compounds), particles mainly composed of natural organic materials, and the like. it can. Moreover, the particle diameter of the filtration particle | grains 4 is suitably selected according to the oil and turbidity in a to-be-processed liquid. Further, the type and particle size of the filtration particles 4 may be different for each filtration column 5. In particular, the clogging of the filtration layer formed by the filtration particles 4 can be suppressed by increasing the particle size of the filtration particles 4 on the upstream side, and filtering out the oil and turbidity in the liquid to be treated in order from the largest. Can do.

  The average thickness of the filtration layer formed in each filtration column 5 by the filtration particles 4 varies depending on the processing capacity required for the multi-layer filtration tower, the particle diameter of the filtration particles 4, and the like, for example, 3 cm or more and 200 cm It can be as follows. Since the multi-layer filtration tower forms a plurality of filtration layers and sequentially removes oil and turbidity in the liquid to be treated, the thickness of the filtration particle 4 in each filtration column 5 is reduced, It is more effective to increase the processing capacity by increasing the number of filtration columns 5, that is, the number of filtration layers.

(Filtration column)
The filtration column 5 includes a multi-layer filtration tower, that is, a cylindrical side frame 7 installed substantially coaxially with the external column 6 in the external column 6, and a porous bottom body 8 covering the lower surface side of the side frame 7. And a porous lid 9 configured to be engageable with the side frame 7 so as to cover the upper surface side of the side frame 7.

[Side frame]
The side frame 7 of the present embodiment includes a cylindrical lower frame 10 and a cylindrical upper frame 11 provided continuously above the lower frame 10. The lower frame 10 has an annular plate-shaped lower flange 12 on the outer periphery of its upper end. The upper frame 11 has an annular plate-shaped upper flange 13 which is connected to the lower flange 12 in a watertight manner and is separably connected to the outer periphery of the lower end. The lower flange 12 and the upper flange 13 may be connected via a packing in order to improve water tightness.

  The lower flange 12 and the upper flange 13 have a plurality (for example, 24 locations) of fixing holes 12a and 13a formed in an annular manner so as to overlap each other, and a part of the plurality of fixing holes 12a and 13a (for example, The bolts 14 that pass through the four locations) and the nuts 15 that are screwed into the bolts 14 are connected in close contact with each other. In the present embodiment, the side frame 7 is watertightly fixed to the outer column 6 described later using the remaining of the plurality of fixing holes 12a and 13a.

  The lower limit of the ratio of the height of the lower frame 10 in the side frame 7 to the height of the upper frame 11 is preferably 1 time, and more preferably 8 times. On the other hand, the upper limit of the ratio of the height of the lower frame 10 in the side frame 7 to the height of the upper frame 11 is not particularly limited and may be any value that can be manufactured. In other words, the height of the upper frame 11 is not limited as long as the height necessary for mounting the porous lid 9 described later can be secured. Depending on the mounting structure of the porous lid 9, the upper frame 11 may not be provided. May be. When the ratio of the height of the lower frame 10 in the side frame 7 to the height of the upper frame 11 is less than the lower limit, when the lower frame 10 and the upper frame 11 are separated, the filtered particles 4 are likely to be scattered outside. There is a risk.

  As a method of disposing the lower flange 12 and the upper flange 13 on the lower frame 10 and the upper frame 11, it is sufficient if they can be connected in a watertight manner. For example, welding, brazing, bonding with an adhesive, or the like is used. Further, the lower flange 12 and the upper flange 13 may be formed integrally with the straight body portions of the lower frame 10 and the upper frame 11, respectively.

  The side frame 7 further includes a handle 16 that is disposed on the upper surface of the upper flange 13 so as to extend upward, and has a shape that can be gripped by a person, and can be lifted by gripping the handle 16. It is configured as follows.

  As the material of the side frame 7, for example, resin, metal, or the like can be used. Among them, stainless steel that is excellent in strength, corrosion resistance, etc. and easy to process is preferably used.

  The average inner diameter of the side frame 7 can be appropriately selected according to, for example, the processing capacity required for the multi-layer filtration tower, and can be, for example, 4 cm to 300 cm.

  The height of the side frame 7 is preferably set to a height that can provide a sufficient space so that the filtration particles accommodated in the filtration column 5 can be washed even if they rise up during backwashing. The specific average height of the side frame 7 can be set to 4 cm or more and 300 cm or less, for example.

  The average width in the radial direction of the lower flange 12 and the upper flange 13 can be, for example, 1 cm or more and 20 cm or less. The average thickness of the lower flange 12 and the upper flange 13 may be, for example, 1 mm or more and 10 mm or less, depending on the material.

(Porous bottom)
The porous bottom body 8 prevents outflow of the filtered particles 4 while allowing outflow or inflow of liquid from the lower end of the side frame 7. For this reason, the porous bottom body 8 is formed from, for example, a plate-like or sheet-like water-permeable material. As a specific example of the plate-like or sheet-like water-permeable material, for example, a mesh (mesh) formed of metal, resin, or the like can be given. In this embodiment, a stainless steel wire mesh is used.

  The porous bottom body 8 of the present embodiment is fastened by bending the outer edge portion to the side surface of the side frame 7 (lower frame 10) and winding a metal belt 17 from above. Further, in the present embodiment, the peripheral edge portion of the porous bottom body 8 extending above the belt 17 is further folded on the outer peripheral surface of the belt 17 so that the gap between the porous bottom body 8 on the belt 17 and the side frame is between. The porous bottom body 8 and the belt 17 are fixed to the side frame 7 by spot welding. This spot welding is performed at a plurality of locations, for example, at intervals of 1 cm to 10 cm in the circumferential direction, for example.

[Porous lid]
The porous lid body 9 is formed of a plate-like or sheet-like water-permeable material so as to prevent the filtration particles 4 from flowing out while allowing the liquid to flow into or out of the side frame 7. As a specific example of the porous lid 9, the same one as the porous bottom 8 can be used. In addition, the method for attaching the porous lid body 9 to the side frame 7 of the present embodiment can be the same as that of the porous bottom body 8. Specifically, the porous lid body 9 of the present embodiment is bent to the side surface of the side frame 7 (upper frame 11), and the belt 17 is wound from above, similarly to the porous bottom body 8. It is concluded with. Further, spot welding is performed between the porous lid 9 on the belt 17 and the side frame 7.

(External column)
The outer column 6 includes a cylindrical body 18 and a pair of outer flanges 19 and 20 each having an annular plate disposed on the upper and lower ends of the body.

  The outer column 6 has an annular plate-like mounting flange 21 that protrudes inward from the inner peripheral surface of the body portion 18 and to which the filtration column 5 is attached. Further, the outer column 6 is fixed to the auxiliary flange 22 having an annular plate shape projecting inwardly from the inner peripheral surface of the body 18 below the mounting flange 21, and the bottom surface of the filtration column 5 is fixed to the outer column 6. And a reinforcing member 23 to be supported. Therefore, the mounting flange 21 is disposed at such a height that the filtration column 5 does not protrude downward from the lower end of the external column 6.

  Further, the external column 6 has a washing water pipe 24 that protrudes outward from the body portion 18 so as to open above the mounting flange 21.

[Body]
The body portion 18 is a structure of the multilayer filtration tower, and is formed in a cylindrical shape so as to constitute a part of an outer wall that defines a flow path of the liquid to be processed. The body portion 18 accommodates the filtration column 5 and is formed watertight so as to seal the liquid to be processed filtered inside.

  The material of the body portion 18 is not particularly limited as long as it has sufficient strength, but may be, for example, resin, metal, or the like. Therefore, this trunk | drum 18 can be formed using a commercially available large diameter pipe, and especially the pipe | tube made from a vinyl chloride which can be reduced in weight at low cost is used suitably.

  The difference between the average inner diameter of the body portion 18 and the average radius of the side frame 7 of the filtration column 5, that is, the average gap between the body portion 18 and the side frame 7 can be, for example, 1 cm or more and 20 cm or less. Since the gap between the body portion 18 and the side frame 7 is a dead space, it is preferable to minimize the gap for the mechanism for attaching and detaching the filtration column 5 to and from the external column 6.

  The average height of the body portion 18 is preferably larger than the average height of the filtration column 5 so that one filtration column 5 can be disposed in each external column 6. Further, in order to efficiently drain the washing water from the washing water pipe 24 at the time of backwashing, the difference between the average height of the trunk portion 18 and the average height of the side frame 7 of the filtration column 5 is preferably set to 5 cm or more and 15 cm or less, for example.

[External flange]
The outer flanges 19 and 20 are arranged to connect the layer module 1 with other components of the multilayer filtration tower. Specifically, the layer module 1 is connected to another layer module 1, the upper end module 2, or the lower end module 3 using the external flanges 19 and 20. For this reason, the outer flanges 19 and 20 have a plurality of bolt holes 19a and 20a through which bolts are inserted and arranged at regular angular intervals with a constant pitch.

  As the external flanges 19 and 20, when the body portion 18 is formed using a large-diameter pipe, a commercially available flange that is commercially available as a pipe for forming the body portion 18 can be used.

  The upper outer flange 19 has an outer wall O-ring 25 that seals between the lower outer flange 20 of the outer column 6 of the upper layer module 1. That is, on the upper surface of the upper external flange 19, an annular groove 19b for disposing the outer wall O-ring 25 is formed.

  The material of the outer flanges 19 and 20 is not particularly limited as long as it has sufficient strength. For example, a resin, a metal, or the like can be used, and is typically the same material as that of the body portion 18.

  As a method for connecting the outer flanges 19 and 20 to the body portion 18, for example, welding, brazing, bonding with an adhesive, or the like is used. Further, the outer flange 20 may be formed integrally with the body portion 18.

[Mounting flange]
The mounting flange 21 is formed with a screw hole 21a into which a mounting screw 26 that passes through the fixing holes 12a and 13a of the lower flange 12 and the upper flange 13 is screwed. Further, the mounting flange 21 is formed with a recess 21b that receives the head of the bolt 14 or the nut 15 that connects the lower flange 12 and the upper flange 13. Further, the mounting flange 21 has an internal sealing O-ring 27 that seals between the mounting flange 21 and the lower flange 12. For this reason, the mounting flange 21 is formed inside the screw hole 21a and the recess 21b, and an annular groove 21c in which the internal sealing O-ring 27 is disposed is formed.

  The material of the mounting flange 21 is not particularly limited as long as it has sufficient strength. For example, it can be made of resin, metal or the like, and is typically made of the same material as that of the body portion 18.

  As a method for connecting the mounting flange 21 to the body portion 18, for example, welding, brazing, bonding with an adhesive, or the like is used. Further, the mounting flange 21 may be formed integrally with the body portion 18.

  The width in the radial direction of the mounting flange 21 can be, for example, 3 cm or more and 10 cm or less. The average thickness of the mounting flange 21 may be, for example, 1 mm or more and 10 mm or less, depending on the material.

  The screw hole 21a is preferably formed so as not to penetrate the mounting flange 21 in the thickness direction in order to ensure water sealability.

[Auxiliary flange]
The auxiliary flange 22 is disposed to hold a reinforcing member 23 described later, and the reinforcing member 23 is attached to the bottom surface of the filtration column 5, that is, the bottom surface of the porous bottom body 8 in a state where the filtration column 5 is attached to the mounting flange 21. Place in the vicinity of

  The auxiliary flange 22 is disposed at a position where the reinforcing member 23 does not come into contact with the porous bottom body 8 so as not to hinder water-tight attachment to the mounting flange 21 of the filtration column 5 and the reinforcing member 23 and the porous bottom. A position where a large gap is not formed between the body 8 and the body 8 is selected.

  The inner diameter of the auxiliary flange 22 is preferably equal to or larger than the inner diameter of the side frame 7 of the filtration column 5. As the thickness of the auxiliary flange 22, it is sufficient that a sufficient strength is obtained.

  Further, the material of the auxiliary flange 22 and the connection method to the body portion 18 can be the same as those of the mounting flange 21.

(Reinforcing member)
The reinforcing member 23 is formed of a member having water permeability and strength, for example, a punching metal, a plurality of bar materials arranged in parallel at intervals, and a wire mesh having a large wire diameter and mesh. The reinforcing member 23 is fixed to the auxiliary flange 22 using, for example, a screw.

  The reinforcing member 23 supports the porous bottom body 8 which is to be bent so as to protrude downward depending on the weight of the filtration particles 4 and the pressure of the liquid to be processed, and the porous bottom body 8 is excessively deformed and stressed. Prevents breakage due to concentration.

[Washing water pipe]
The washing water pipe 24 is disposed in the external column 6 so as to open at a position higher than the porous lid 9 of the filtration column 5.

  The washing water pipe 24 is used for supplying or discharging washing water when the filtration particles 4 in the filtration column 5 are backwashed. That is, in the multi-layer filtration tower, the wash water is supplied from the wash water pipe 24 of the lower layer module 1 to backwash the filter particles 4 of the upper layer module 1 and the filter module 4 is washed. Wash water can be drained from the wash water pipe 24.

<Top module>
The upper end module 2 is disposed to seal the upper ends of the plurality of layer modules 1 stacked, and includes a water supply pipe 28 for supplying a liquid to be treated to the layer module 1.

  The structure of the upper end module 2 includes a cylindrical body portion 2a, a pair of flange portions 2b disposed outside both ends of the body portion 2a, and a blind flange 2c attached to the upper flange portion. can do.

  The material of the upper end module 2 can be the same as that of the external column 6.

<Bottom module>
The lower end module 3 is disposed in order to seal the lower ends of the plurality of layer modules 1 stacked, a drain pipe 29 for discharging treated water that has passed through the plurality of layer modules 1, and a lowermost layer A cleaning water pipe 30 for supplying cleaning water to the module 1 is provided.

  The structure of the lower end module 3 is the same as that of the upper end module 2, and is attached to a cylindrical body 3a, a pair of flanges 3b disposed outside both ends of the body 3a, and a lower flange. It is possible to have a blind flange 3c.

  The material of the lower end module 3 can be the same as that of the upper end module 2.

<Advantages>
The layer module 1 includes a side column 7 and a porous bottom body 8 so that a liquid to be treated can flow therethrough and a filtration column 5 that can accommodate filtration particles 4. For this reason, the filtration particles 4 are accommodated in the filtration column 5 and installed in the multi-layer filtration tower to form independent filtration layers, and the liquid to be treated is filtered and discharged from the porous bottom body 8. be able to. For this reason, the layer module 1 is used to configure various multi-layer filtration towers according to the liquid to be treated, for example, by combination with the other layer module 1 or selection of the filtration particles 4 to be accommodated. Can be used and is highly versatile. In particular, the layer module 1 prevents the filtration particles 4 from flowing out by the porous bottom body 8, and the inner filtration particles 4 do not mix with the filtration particles 4 accommodated in the other layer modules 1. Arbitrary filtered particles 4 can be used without being affected by the type of filtered particles 4 accommodated in the layer module 1. For this reason, the freedom degree of selection of the filtration particle 4 is large. In addition, when it is necessary to maintain the multi-layer filtration tower due to clogging of the filtration particles 4, etc., maintenance work can be performed by detaching the layer module 1 from the multi-layer filtration tower. The work efficiency of the maintenance of the multi-layer filtration tower can be improved.

  In addition, the layer module 1 includes a porous lid 9 that can be engaged with the side frame 7 so as to cover the upper surface side of the side frame 7, thereby preventing the filtered particles 4 from flowing out during backwashing or the like. it can.

  Moreover, the said layer module 1 becomes easy to handle the filtration particle 4 by providing the filtration particle 4 accommodated in the filtration column 5 beforehand, and can comprise a multilayer filtration tower comparatively easily.

  In addition, the layer module 1 includes the porous bottom body 8 which is fastened by bending the outer edge portion to the side surface of the side frame 7 and winding the belt 17 from above. Is securely and firmly fixed to the side frame 7, and handling is further facilitated.

  In addition, the layer module 1 constitutes a part of the outer wall of the multilayer filtration tower, and includes a cylindrical external column 6 on which the filtration column 5 is installed, so that the filtration column 5 to be used can be accommodated. An optimal multi-layer filtration tower can be easily constructed.

  In addition, the layer module 1 is disposed inside the outer column 6 and includes the reinforcing member 23 that supports the bottom surface of the filtration column 5, whereby the porous bottom body 8 can be reliably prevented from breaking.

  Thus, since the said several layer module 1 is installed substantially coaxially, an assembly is easy and the filtration particle | grains 4 can be replaced | exchanged for the said layer module 1 whole. Moreover, since filtration particle | grains are enclosed for every said layer module 1, the kind of filtration particle | grains 4 enclosed with each layer module 1 can be selected freely.

[Other Embodiments]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is not limited to the configuration of the embodiment described above, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims. The

  In the layer module, the filtration column may not have a porous lid. For example, the upper end of the lower filtration column may be connected so as to be sealed with the porous bottom body of the upper filtration column, and a porous body that prevents the outflow of filtered particles may be provided in the washing water pipe.

  When the layer module does not have a porous lid, a washing water pipe may be provided in the filtration column, and a porous body that prevents the outflow of filtered particles may be disposed in the opening of the washing water pipe. Further, the cleaning water pipe is not essential in the layer module. That is, it may be possible to only back-wash the filtered particles in the plurality of layer modules at once with the washing water flowing through the plurality of layer modules.

  Moreover, the said layer module may be provided in the state which does not contain the filtration particle. That is, the user may use it by filling desired filtration particles.

  In the layer module, the method of attaching the porous bottom body to the side frame is not limited to the method of using a belt as in the above embodiment, and any method such as welding, brazing, or adhesion may be used. .

  In the layer module, the filtration column may be formed such that the side frame, the porous bottom body, and the porous lid body are connected so as not to be separated, and the filtration particles cannot be exchanged. Thus, by making the filtration particles non-exchangeable, the amount of filtration particles necessary for forming the filtration layer can be ensured, and the configuration of the filtration column can be simplified to suppress the manufacturing cost.

  Further, the layer module may not have an external column. For example, using a cylindrical connection column that provides connection flanges on the outer periphery near the upper end and the outer periphery near the lower end of the side column of the filtration column, and connects the connection flanges of the two filtration columns arranged above and below in a watertight manner. A filtration column may be connected.

  Further, the side frame of the filtration column of the layer module is not divided into the upper frame and the lower frame, and may be integrally formed.

  Further, the connection between the upper frame and the lower frame, the connection between the filtration column and the external column, and the connection between the external columns may be a method other than a flange, for example, a method using a clamp or the like. Moreover, when using a flange, the flange itself does not need to be connected in a watertight manner, and a so-called loose flange structure in which the end surfaces of the straight body portion are pressed directly or via a sealing member may be used.

  Moreover, the structure used for the water seal between each member, such as a flange, can employ a known water seal structure such as a structure using a flat packing as well as a structure using an O-ring.

  In the layer module, the auxiliary flange and the reinforcing member may be omitted.

  The filtration column may be disposed in the outer column by sandwiching the flange of the filtration column between the flanges of the outer column. In this case, a cleaning water pipe for discharging the cleaning water used for backwashing the lower layer module may be provided at the lower part of the body of the external column, and the cleaning water pipe may be provided as a separate module.

  The drain pipe and the cleaning water pipe of the lower end module may share one pipe.

  The layer module and the multi-layer filtration tower can be widely used for filtering out oil and turbidity.

1 layer module 2 upper end module 2a trunk 2b flange 2c blind flange 3 lower end module 3a trunk 3b flange 3c blind flange 4 filtration particle 5 filtration column 6 outer column 7 side frame 8 porous bottom body 9 porous lid 10 Lower frame 11 Upper frame 12 Lower flange 12a Fixing hole 13 Upper flange 13a Fixing hole 14 Bolt 15 Nut 16 Handle 17 Belt 18 Body 19, 20 External flange 19a, 20a Bolt hole 19b Annular groove 21 Mounting flange 21a Screw hole 21b Recess 21c Annular groove 22 Auxiliary flange 23 Reinforcement member 24 Washing water pipe 25 Outer wall O-ring 26 Mounting screw 27 Internal sealing O-ring 28 Water supply pipe 29 Drain pipe 30 Washing water pipe

Claims (7)

A layer module constituting a multi-layer filtration tower,
Comprising a filtration column containing filtration particles;
This filtration column is
A cylindrical side frame installed substantially coaxially in the multi-layer filtration tower;
A layer module having a porous bottom covering the lower surface side of the side frame.   The layer module according to claim 1, wherein the filtration column further includes a porous lid configured to be engageable with the side frame so as to cover the upper surface side of the side frame.   The layer module according to claim 1, further comprising filtration particles accommodated in the filtration column.   4. The layer module according to claim 1, wherein the porous bottom body is fastened by bending an outer edge portion to a side surface of the side frame and winding a belt from above.   The layer module according to any one of claims 1 to 4, further comprising a cylindrical external column that constitutes a part of an outer wall of the multi-layer filtration tower and in which the filtration column is installed.   The layer module according to claim 5, further comprising a reinforcing member disposed inside the outer column and supporting a bottom surface of the filtration column.   A multi-layer filtration tower in which the plurality of layer modules according to claim 5 or 6 are installed substantially coaxially.

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