JP2018015676A - Cleaning module and multilayer filter column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning module which can structure a multilayer filter tower which exhibits a high agitation effect of filter particles in cleaning the filter particles.SOLUTION: A cleaning module 1 of a multilayer filter tower includes a plurality of nozzles arranged on an outer edge part of the multilayer filter tower, and one or a plurality of pipes which force-feed a liquid to these nozzles. The plurality of nozzles incline to one side in a circumferential direction with a radius direction of the multilayer filter tower as a reference. The plurality of nozzles are positioned in approximately same axial direction positions and at approximately equal angle intervals of the multilayer filter tower. The plurality of nozzles incline upward or downward in an axial direction of the multilayer filter tower. The plurality of nozzles are arranged in the multilayer filter tower, and include in-tower pipes arranged in the multilayer filter tower as a part of the pipes. An annular support member, which supports the plurality of nozzles and the in-tower pipes and are arranged in the multilayer filter tower, is further provided preferably.SELECTED DRAWING: Figure 1

Description

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

  For oil / water mixtures containing oil and turbidity generated in oil fields and factories, reduce the amount of oil and turbidity (including suspended solids and gel-like substances) to a certain level or less from the viewpoint of environmental conservation. It must be discarded. 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, 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 addition, in the above publication, a nozzle for supplying gas to the layer of filtered particles is disposed in the filter tower body, and when the cleaning water is supplied from the bottom of the filter tower, the gas is blown from the nozzle. It has also been proposed to improve the stirring effect due to the swirling flow generated in the filtration tower.

JP 2013-248563 A

  In the configuration disclosed in the above publication, the swirl flow is generated by the gas, so the swirl energy cannot be increased, and the stirring effect may not be sufficiently promoted.

  The present invention has been made based on the above-described circumstances, and a washing module that can constitute a multi-layer filtration tower having a high stirring effect of the filtration particles at the time of washing the filtration particles, and a multi-layer filtration tower using the washing module It is an issue to provide.

  One aspect of the present invention made to solve the above problems is a cleaning module for a multi-layer filtration tower, which includes a plurality of nozzles disposed at an outer edge portion in the multi-layer filtration tower, and these nozzles. The cleaning module includes one or a plurality of pipes for pumping liquid, and the plurality of nozzles are inclined to one side in a circumferential direction with respect to a radial direction of the multilayer filtration tower.

  The cleaning module according to one embodiment of the present invention can improve the stirring effect of the filtered particles when cleaning the filtered particles in the multi-layer filtration tower.

FIG. 1 is a schematic vertical sectional view showing a multi-layer filtration tower according to an embodiment of the present invention. FIG. 2 is a schematic vertical sectional view of the cleaning module of FIG. FIG. 3 is a schematic horizontal sectional view of the cleaning module of FIG. FIG. 4 is a schematic vertical sectional view of a cleaning module according to an embodiment different from FIG. FIG. 5 is a schematic horizontal sectional view of the cleaning module of FIG.

[Description of Embodiment of the Present Invention]
One aspect of the present invention is a cleaning module for a multi-layer filtration tower, which includes a plurality of nozzles disposed at an outer edge portion of the multi-layer filtration tower, and one or a plurality of pipes that pump liquid to these nozzles. And the plurality of nozzles are inclined to one side in the circumferential direction with respect to the radial direction of the multilayer filtration tower.

  The said washing | cleaning module is installed in a multi-layer filtration tower, a liquid is ejected from a nozzle, and it is used for the washing | cleaning of the filtration particle | grains of a multi-layer filtration tower. When washing the filtration particles, the liquid pumped through the piping can be sprayed from the plurality of nozzles into the multilayer filtration tower. The plurality of nozzles inject liquid in a direction inclined to one side of the circumferential direction with respect to the radial direction of the multi-layer filtration tower, so that a swirl flow can be reliably generated in the multi-layer filtration tower. Therefore, the stirring effect of the filtration particle | grains at the time of washing | cleaning of the filtration particle | grains of a multilayer filtration tower can be improved.

  The plurality of nozzles may be located at substantially the same axial position and substantially equiangular intervals of the multi-layer filtration tower. As described above, the plurality of nozzles are positioned at substantially the same axial direction and substantially equiangular intervals of the multi-layer filtration tower, so that the swirl flow can be more reliably generated in the multi-layer filtration tower. Therefore, the stirring effect can be further improved.

  The plurality of nozzles may be inclined upward or downward in the axial direction of the multilayer filtration tower. As described above, the plurality of nozzles are inclined upward or downward in the axial direction of the multi-layer filtration tower, whereby the filtered particles can be more efficiently stirred. That is, if the injection by a plurality of nozzles is parallel to the vertical plane with respect to the axial direction, the swirling flow generated by the nozzles tends to be a circular flow parallel to the vertical plane. On the other hand, if the plurality of nozzles are inclined upward or downward in the axial direction of the multi-layer filtration tower as described above, the swirling flow formed is only a component in a direction parallel to the vertical plane. Therefore, a three-dimensional flow having a vertical component along the axial direction is likely to occur, and thus the filtered particles can be stirred more efficiently.

  The plurality of nozzles are disposed in a multi-layer filtration tower, and have a pipe in the tower disposed in the multi-layer filtration tower as a part of the pipe, supporting the plurality of nozzles and the pipe in the tower, It is good to further provide an annular support member disposed in the multilayer filtration tower. As described above, by supporting the plurality of nozzles and the pipe in the tower on the annular support member arranged in the filtration tower, the plurality of nozzles can be easily arranged in the filtration tower at once. it can. This facilitates the installation, assembly and maintenance of the multi-layer filtration tower.

  The plurality of nozzles may be disposed so as to penetrate the outer wall of the multilayer filtration tower. Thus, by arranging the plurality of nozzles so as to penetrate the outer wall of the multilayer filtration tower, the plurality of nozzles can be arranged as described above with a relatively simple configuration.

  It is good to further comprise an external column that constitutes a part of the outer wall of the multi-layer filtration tower and in which the plurality of nozzles and the one or more pipes are arranged. As described above, the outer column and the outer wall of the multi-layer filtration tower are provided by forming an external column that constitutes a part of the outer wall of the multi-layer filtration tower and in which the plurality of nozzles and the one or more pipes are disposed. A multi-layer filtration tower can be easily assembled by combining with members constituting other parts. This facilitates the installation, assembly and maintenance of the multi-layer filtration tower.

  A filtration column containing filtration particles is further provided, and the plurality of nozzles may be installed so as to eject liquid into the filtration column. Thus, by providing the filtration column containing the filtration particles, the exchange of the filtration particles is easy, and the plurality of nozzles are installed so as to eject liquid into the filtration column, thereby further improving the efficiency of the filtration particles. Stir well. Moreover, by providing both the filtration column which accommodates filtration particle | grains, and the said nozzle which injects a liquid in this filtration column, the optimization of the liquid injection direction of the nozzle with respect to filtration particle | grains can be ensured, and filtration particle | grains The stirring effect can be obtained more easily and reliably.

  The multilayer filtration tower which concerns on another aspect of this invention is equipped with the said washing | cleaning module.

  Since the multi-layer filtration tower is equipped with the cleaning module, it is easy to install, assemble and maintain, and a plurality of nozzles of the cleaning module can reliably generate a swirling flow in the tower. The stirring effect at the time of washing particles can be easily and reliably improved.

  Here, “the plurality of nozzles are positioned at substantially the same axial position and at substantially equal angular intervals” means that the plurality of nozzles that generate the swirling flow by the liquid injection do not hinder the generation of the swirling flow by the mutual injection. It is arranged substantially evenly with respect to the shaft. Specifically, “substantially the same axial position” means that the vertical distance between the center of the nozzle tip in the axial direction between the uppermost nozzle and the lowermost nozzle is the axial direction of the cleaning module. It means 10% or less of the maximum height, preferably 5% or less. In addition, “substantially equiangular intervals” means that the maximum value of angular intervals viewed from the central axis is 120% or less, preferably 110% or less of the minimum value.

[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.

[First embodiment]
The multi-layer filtration tower of FIG. 1 includes two cleaning modules 1 that are stacked substantially coaxially in the vertical direction. In addition, the multi-layer filtration tower includes a filtration module 2 that is stacked on the lower side of the washing module 1 so as to be substantially coaxial with the washing module 1 in the vertical direction. In addition, the multi-layer filtration tower includes an upper end module 3 that is installed on the uppermost cleaning module 1 substantially coaxially with the cleaning module 1. Further, the multi-layer filtration tower includes a lower end module 4 that is installed substantially coaxially with the cleaning module 1 and the filtration module 2 below the filtration module 2. 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.

<Washing module>
The washing module 1 which is a component of the multi-layer filtration tower is itself an embodiment of the present invention. As shown in detail in FIG. 2, the cleaning module 1 includes a filtration particle 5 and a filtration column 6 that accommodates the filtration particle 5. The cleaning module 1 is a component that forms a filtration layer with the filtration particles 5 and removes oil, turbidity, and the like in the liquid to be treated that circulates in the multilayer filtration tower, and also cleans the filtration particles 5. It is a component for.

  Moreover, the said washing | cleaning module 1 comprises a cylindrical outer column 7 which comprises a part of outer wall of the said multilayer filtration tower, and the said filtration column 6 is arrange | positioned inside. The cleaning module 1 includes a cleaning unit 8 disposed at the upper end of the filtration column 6. Further, the cleaning module 1 includes a lid 9 disposed on the upper portion of the cleaning unit 8.

  The filtration column 6, the washing unit 8 and the lid 9 have a plurality of fixing holes 14 a of the filtration column 6, which will be described in detail later, a plurality of fixing holes 23 of the washing unit 8 and a part of the plurality of fixing holes 25 a of the lid 9. The plurality of bolts 10 that pass therethrough and the nuts 11 that are screwed to the plurality of bolts are integrally coupled. In addition, the filter column 6, the cleaning unit 8 and the lid 9 are integrated using a plurality of fixing holes 14a, fixing holes 23, and mounting screws 37 penetrating the rest of the fixing holes 25a, as will be described in detail later. It is configured to be fixed inside the external column 7.

(Filtered particles)
The filtration particle 5 is a filter medium that forms a filtration layer for filtering the water to be treated in the filtration column 6. As the filtration particles 5, 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 can be used. it can. Moreover, the particle diameter of the filtration particle | grains 5 is suitably selected according to the oil and turbidity which should be filtered. Further, the type and particle size of the filtration particles 5 may be different for each filtration column 6. In particular, it is possible to suppress clogging of the filtration layer formed by the filtration particles 5 by increasing the particle diameter of the filtration particles 5 on the upstream side, and filtering off the oil and turbidity in the water to be treated in order from the largest. it can.

  The average thickness of the filtration layer formed in each filtration column 6 by the filtration particles 5 varies depending on the processing capacity required for the multi-layer filtration tower, the particle diameter of the filtration particles 5, and the like. 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 water to be treated, the filtration particle 5 in each filtration column 6 is reduced in thickness and filtered. It is more effective to increase the processing capacity by increasing the number of columns 6, that is, the number of filtration layers.

(Filtration column)
The filtration column 6 includes a cylindrical side frame 12 and a porous bottom body 13 that covers the lower surface side of the side frame 12.

[Side frame]
The side frame 12 is installed substantially coaxially with the external column 7 in the multi-layer filtration tower, that is, the external column 7.

  The side frame 12 has an annular plate-like flange 14 that is disposed on the outer periphery of the upper end and in which a plurality of fixing holes 14a are formed at substantially equal intervals. The flange 14 is used for coupling with the washing unit 8 and the lid 9 and fixing to the external column 7.

  As a method of connecting the flange 14 to the main body of the side frame 12, it is sufficient if it can be connected in a watertight manner, and for example, welding, brazing, bonding with an adhesive, or the like is used. Further, the side frame 12 may be integrally formed with the flange 14.

  As the material of the side frame 12, 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 12 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.

  It is preferable that the height of the side frame 12 be a height that can provide a sufficient space so that the filtration particles accommodated in the filtration column 6 can be washed even if they rise up during backwashing. The specific average height of the side frame 12 can be, for example, 4 cm or more and 300 cm or less.

(Porous bottom)
The porous bottom body 13 prevents the filtered particles 5 from flowing out while allowing outflow or inflow of water from the lower end of the side frame 12. For this reason, the porous bottom body 13 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 13 is fixed to the lower end of the side frame 12. As a specific fixing method of the porous bottom body 13, for example, there is a method in which the outer edge portion of the porous bottom body 13 is bent to the side surface of the side frame 12 and fastened by winding a metal belt 15 from above. Can be mentioned. Further, the peripheral edge portion of the porous bottom body 13 extending above the belt 15 is further folded on the outer peripheral surface of the belt 15, and spot welding is performed between the porous bottom body 13 on the belt 15 and the side frame 12. The porous bottom body 13 and the belt 15 may be fixed to the side frame 12. 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.

(Washing unit)
As shown in FIG. 3 in addition to FIG. 2, the washing unit 8 is disposed in the inner outer edge of the multi-layer filtration tower, that is, in the vicinity of the outer column 7, and a liquid (filtered particles 5) is placed in the filtration column 6. A plurality of nozzles 16 that eject water), and a plurality of pipes that constitute flow paths for pumping liquid to these nozzles 16. Further, the cleaning unit 8 includes an annular support member 19 that supports the plurality of nozzles 16 and the plurality of pipes and is disposed in the multilayer filtration tower.

  More specifically, the cleaning unit 8 includes two tower pipes 17 and two supply pipes 18 respectively connected to the two tower pipes 17 as the plurality of pipes. A total of four nozzles 16 connected to each other are provided. The plurality of pipes and nozzles 16 are disposed in the external column 7.

〔nozzle〕
The four nozzles 16 are disposed at substantially the same axial position of the multi-layer filtration tower at equiangular (90 °) intervals when viewed from the central axis of the multi-layer filtration tower. The nozzles 16 are inclined at a constant angle on one side in the circumferential direction with respect to the radial direction of the multi-layer filtration tower and at a constant angle below the axial direction of the multi-layer filtration tower. Such an arrangement of the nozzles 16 allows the swirling energy to be uniformly distributed in the circumferential direction to the liquid inside the multi-layer filtration tower, and a swirling flow can be efficiently formed.

  The nozzle 16 may be any nozzle that can eject the liquid supplied by being pumped through the tower piping 17 as a jet. The specifications such as the diameter of the nozzle 16 are selected according to, for example, the number of nozzles 16 included in the cleaning module, the type and amount of the filtration particles 5 accommodated in the filtration column 6, the type and amount of the liquid to be treated, and the like. . The specifications of the nozzles 16 may be different from each other, but a uniform swirling flow can be formed in the circumferential direction by using the same specifications. The total flow rate of the liquid ejected from the nozzle 16 of one cleaning module is not particularly limited, but is preferably equal to or more than the water flow rate during filtration.

  The nozzle 16 is disposed at the outer edge of the multilayer filtration tower. Specifically, the lower limit of the distance from the center axis of the outer column 7 at the center of the nozzle 16 is preferably 60%, more preferably 70%, and even more preferably 75% of the inner radius of the outer column 7. .

  The absolute value of the inclination angle of the injection direction of the nozzle 16 as viewed in the axial direction of the multi-layer filtration tower, that is, the inclination angle θ in the circumferential direction with respect to the radial direction of the multi-layer filtration tower at the center of the nozzle tip of the nozzle 16 As a minimum of (refer FIG. 3), 10 degrees is preferable, 20 degrees is more preferable, 45 degrees is further more preferable, and 60 degrees is especially preferable. On the other hand, the upper limit of the circumferential inclination angle θ of the nozzle 16 is preferably 90 ° and more preferably 80 °. When the circumferential inclination angle θ of the nozzle 16 is less than the lower limit, the circumferential component of the jet, that is, the swirl energy for swirling the liquid in the multi-layer filtration tower is insufficient, and the stirring effect of the filter particles is increased. May be insufficient. On the contrary, when the inclination angle θ in the circumferential direction of the nozzle 16 exceeds the above upper limit, the radial component of the liquid flow formed in the multi-layer filtration tower becomes small, and the stirring effect of the filter particles 5 is not good. May be sufficient.

  Although it does not specifically limit as a minimum of the absolute value of the inclination angle of the up-down direction with respect to the horizontal direction of the injection direction of the nozzle 16, 10 degrees is preferable and 20 degrees is more preferable. On the other hand, the upper limit of the inclination angle of the nozzle 16 in the vertical direction is preferably 60 °, and more preferably 50 °. When the inclination angle of the nozzle 16 in the vertical direction is less than the lower limit, the vertical component of the liquid flow formed in the multi-layer filtration tower becomes small, and the stirring effect of the filter particles 5 becomes insufficient. There is a fear. On the contrary, when the vertical inclination angle of the nozzle 16 exceeds the upper limit, the swirling energy of the liquid formed in the multi-layer filtration tower becomes small, and the stirring effect of the filter particles 5 may be insufficient. is there.

[Tower piping]
The two in-column pipes 17 have the same shape and are arranged symmetrically so as to face each other with the central axis of the multi-layer filtration tower interposed therebetween. These in-column pipes 17 are each curved in an arc shape along an annular support member 19 described later. The two pipes 17 in the tower are supported by the support member 19 so as to be accommodated in the support member 19. A plurality of nozzles 16 are arranged in each of these in-column pipes 17.

  The material of the pipe 17 in the tower is not particularly limited, but can be, for example, resin, metal or the like. Specifically, the tower piping 17 can be formed by sealing both ends of a curved pipe.

  The diameter of the tower piping 17 is appropriately selected in consideration of the flow rate of the liquid ejected from the nozzle 16 and the like. In addition, the length of the tower piping 17 is appropriately selected in consideration of the length necessary for mounting the nozzle 16 and fixing the tower piping 17 to the support member 19.

  As a method of attaching the nozzle 16 to the tower piping 17, a structure that can connect the nozzle 16 to one end, for example, a socket formed with an internal screw, a single pipe provided with a flange, or the like is formed in the opening formed in the tower piping 17. Examples of the method include attachment by welding, brazing, adhesion using an adhesive, and the like.

[Supply piping]
The supply pipe 18 is arranged in a one-to-one correspondence with the tower pipe 17 and is connected to the tower pipe 17 through the external column 7. Specifically, the supply pipe 18 is connected to the outside of the central part in the length direction of the tower pipe 17.

  As a method of connecting the supply pipe 18 to the tower pipe 17, for example, a method of attaching the tower pipe 17 to the opening formed in the tower pipe 17 by welding, brazing, bonding with an adhesive, or the like. And a method having a joint such as a pipe joint).

  The supply pipe 18 is preferably provided with a seal mechanism 20 at the penetrating portion of the external column 7. As such a sealing mechanism 20, a frame member that sandwiches the external column 7 via packing, and a sealing member that seals between the frame member and the outer periphery of the supply pipe 18 using, for example, a gland packing or the like. It can have.

(Support member)
The support member 19 is formed in an annular shape having a square cross section and having a cavity inside, and an opening into which the tower piping 17 can be inserted is provided on the inner peripheral surface. In addition, the support member 19 has a plurality of ribs 21 that support the in-tower tower pipe 17 disposed on the inner side thereof substantially coaxially. The support member 19 is provided with a pressing member 22 for fixing the tower piping 17 to the inner peripheral surface.

  As a method for attaching the rib 21 and the pressing member 22, for example, a screw hole is provided at the radially inner end of the rib 21, and a fixing screw is screwed through a through hole formed in the inner portion of the support member 19 and the pressing member 22. Can be adopted.

  The support members 19 are integrally formed with the filtration column 6 and the lid 9, and are arranged in an annular shape at substantially equal angular intervals so as to be fixed to the external column 7, and are formed by penetrating in the vertical direction. The fixing hole 23 is provided.

(lid)
The lid 9 is attached to the upper end of the cleaning unit 8. The lid 9 prevents the filtered particles 5 from flowing out while allowing the water to flow into or out of the filtering column 6 via the washing unit 8.

  The lid 9 is disposed on the outer periphery of the cylindrical frame portion 24, the lower end portion of the frame portion 24, and seals the upper end of the frame portion 24 and the flange 25 in which a plurality of fixing holes 25a are formed at substantially equal angular intervals. And a porous lid 26 attached to stop. The lid 9 includes a plurality of handles 27 that are disposed on the upper surface of the flange 25 so as to extend upward and have a shape that can be gripped by a person.

  The porous lid 26 is formed from a plate-like or sheet-like water-permeable material. As a specific example of the porous lid body 26, the same one as the porous bottom body 13 can be used. Further, like the porous bottom body 13, the porous lid body 26 is fastened by bending the side surface of the frame portion 24 and winding the belt 28 from above. Further, spot welding is performed between the porous lid 26 on the belt 28 and the frame portion 24.

(External column)
The external column 7 includes a cylindrical body portion 29 and a pair of outer flanges 30 and 31 having a circular plate shape disposed on the upper and lower ends of the body portion 29.

  The external column 7 has an annular plate-like mounting flange 32 that protrudes inward from the inner circumferential surface of the body portion 29 and to which the filtration column 6, the cleaning unit 8, and the lid 9 are attached. Accordingly, the nozzle 16 and the plurality of pipes of the cleaning unit 8 are disposed in the external column 7. Further, the outer column 7 is fixed to the auxiliary flange 33 having an annular plate shape projecting inwardly from the inner peripheral surface of the body portion 29 below the mounting flange 32, and the bottom surface of the filtration column 6. And a reinforcing member 34 for supporting. Therefore, the mounting flange 32 is disposed at such a height that the filtration column 6 does not protrude downward from the lower end of the external column 7.

  Further, the outer column 7 has a washing water pipe 35 protruding outward from the body portion 29 so as to open above the mounting flange 32.

[Body]
The trunk | drum 29 is a structure of the said multilayer filtration tower, and is formed in a cylindrical shape so that a part of outer wall which defines the flow path of to-be-processed water may be comprised. The body portion 29 accommodates the filtration column 6 and seals the liquid to be processed that is filtered inside. Further, the supply pipe 18 of the cleaning unit 8 penetrates through the body portion 29.

  The material of the body part 29 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 29 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 29 and the average radius of the side frame 12 of the filtration column 6, that is, the average gap between the body portion 29 and the side frame 12 can be, for example, 1 cm or more and 20 cm or less. Since the gap between the body 29 and the side frame 12 is a dead space, it is preferable to minimize the gap for the mechanism for attaching and detaching the filtration column 6 to and from the external column 7.

  The average height of the body portion 29 is preferably larger than the average height of the filtration column 6 so that one filtration column 6 can be disposed in each external column 7. Further, in order to efficiently drain the cleaning water from the cleaning water pipe 35 at the time of backwashing, the difference between the average height of the body portion 29 and the average height of the side frame 12 of the filtration column 6 may be set to, for example, 5 cm or more and 15 cm or less.

[External flange]
The outer flanges 30, 31 are arranged to connect the washing module 1 with other components of the multi-layer filtration tower. Specifically, the cleaning module 1 is connected to another cleaning module 1, the filtration module 2, the upper end module 3, or the lower end module 4 using the external flanges 30 and 31. For this reason, the outer flanges 30 and 31 have a plurality of bolt holes 30a and 31a through which bolts are inserted and arranged at equal angular intervals at a constant pitch.

  As the external flanges 30 and 31, when the trunk portion 29 is formed using a large-diameter pipe, a commercially available flange that is commercially available as a pipe for forming the trunk portion 29 can be used.

  The upper outer flange 30 has an outer wall O-ring 36 that seals between the lower outer flange 31 of the outer column 7 of the upper cleaning module 1. That is, on the upper surface of the upper outer flange 30, an annular groove 30b is formed which is formed inside the bolt hole 30a and in which the outer wall O-ring 36 can be disposed.

  The material of the outer flanges 30 and 31 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 29.

  As a method for connecting the outer flanges 30 and 31 to the body portion 29, for example, welding, brazing, adhesion with an adhesive, or the like is used. Further, the outer flange 31 may be formed integrally with the body portion 29.

[Mounting flange]
The mounting flange 32 is formed with a screw hole 32a into which a mounting screw 37 passing through the fixing hole 14a of the filtration column 6, the fixing hole 23 of the cleaning unit 8, and the fixing hole 25a of the lid 9 is screwed. Further, the mounting flange 32 is formed with a recess 32b for receiving the head of the bolt 10 or the nut 11 connecting the filtration column 6, the cleaning unit 8 and the lid 9. Further, the mounting flange 32 has an internal sealing O-ring 38 that seals between the flange 14 of the filtration column 6. For this reason, the mounting flange 32 is formed with an annular groove 32c that is formed inside the screw hole 32a and the recess 32b and in which the internal sealing O-ring 38 can be disposed.

  The material of the body part 29 is not particularly limited as long as it has sufficient strength. For example, it can be a resin, metal, or the like, and is typically the same material as the body part 29.

  As a method for connecting the mounting flange 32 to the body portion 29, for example, welding, brazing, bonding with an adhesive, or the like is used. Further, the mounting flange 32 may be formed integrally with the body portion 29.

  The radial width of the mounting flange 32 can be, for example, 3 cm or more and 10 cm or less. Further, the average thickness of the mounting flange 32 may be, for example, 1 mm or more and 10 mm or less, depending on the material.

  The screw hole 32a is preferably formed so as not to penetrate the mounting flange 32 in the thickness direction in order to ensure water sealability.

[Auxiliary flange]
The auxiliary flange 33 is disposed to hold a reinforcing member 34 described later, and the reinforcing member 34 is attached to the bottom surface of the filtration column 6, that is, the lower surface of the porous bottom body 13 in a state where the filtration column 6 is attached to the attachment flange 32. Place in the vicinity of

  The auxiliary flange 33 is disposed at a position where the reinforcing member 34 does not abut against the porous bottom body 13 so as not to hinder watertight attachment to the mounting flange 32 of the filtration column 6 and the reinforcing member 34 and the porous bottom A position where a large gap is not formed between the body 13 and the body 13 is selected.

  The inner diameter of the auxiliary flange 33 is preferably equal to or larger than the inner diameter of the side frame 12 of the filtration column 6. As thickness of the auxiliary | assistant flange 33, sufficient intensity | strength should just be acquired.

  Further, the material of the auxiliary flange 33 and the connection method to the body portion 29 can be the same as those of the mounting flange 32.

(Reinforcing member)
The reinforcing member 34 is formed of a member having water permeability and strength, for example, a punching metal, a plurality of bars arranged in parallel at intervals, a wire mesh having a large wire diameter, and a large opening. The reinforcing member 34 is fixed to the auxiliary flange 33 using, for example, a screw.

  The reinforcing member 34 supports the porous bottom body 13 from the lower side so as to protrude downward due to the weight of the filtered particles 5 and the pressure of the liquid to be treated, and the porous bottom body 13 is excessively deformed and stressed. Prevents breakage due to concentration.

<Filtration module>
The filtration module 2 further filters the liquid to be treated filtered by the cleaning module 1, and is a constituent element of the multilayer filtration tower. Specifically, the filtration module 2 has the same configuration as that obtained by removing the cleaning unit 8 from the cleaning module 1. That is, the filtration module 2 includes filtration particles 5 and a filtration column 6 that accommodates the filtration particles 5. The filtration module 2 includes a cylindrical outer column 7 that constitutes a part of the outer wall of the multilayer filtration tower and in which the filtration column 6 is disposed. Further, the filtration module 2 includes a lid 9 disposed on the upper part of the filtration column 6. Therefore, the detailed description about this filtration module 2 is abbreviate | omitted. Note that the bolt 10 and the mounting screw 37 disposed in the fixing hole 14a of the filtration column 6 and the fixing hole 25a of the lid 9 are shorter than those in the cleaning module 1 when the cleaning unit 8 is removed. Has been.

[Washing water pipe]
The washing water pipe 35 is disposed in the external column 7 so as to open at a position higher than the lid 9 of the filtration column 6.

  The washing water pipe 35 is used for supplying or discharging washing water when the filtration particles 5 in the filtration column 6 are backwashed. That is, in the multi-layer filtration tower, the washing water is supplied from the washing water pipe 35 of the lower washing module 1 to backwash the filtered particles 5 of the upper washing module 1 and wash the filtered particles 5. Wash water can be drained from the wash water pipe 35.

<Top module>
The upper end module 3 is disposed to seal the upper ends of the plurality of stacked cleaning modules 1 and includes a water supply pipe 39 for supplying water to be processed to the cleaning module 1.

  The structure of the upper end module 3 includes a cylindrical barrel portion 3a, a pair of flange portions 3b disposed outside both ends of the barrel portion 3a, and a blind flange 3c attached to the upper flange portion. can do.

  The material of the upper end module 3 can be the same as that of the external column 7.

<Bottom module>
The lower end module 4 is disposed to seal the lower ends of the plurality of stacked cleaning modules 1, the drain pipe 40 for discharging treated water that has passed through the plurality of cleaning modules 1, and the lowermost layer cleaning A cleaning water pipe 41 for supplying cleaning water to the module 1 and an air supply pipe 42 for supplying bubbles for scrubbing the filtered particles 5 during cleaning are provided.

  As the structure of the lower end module 4, similarly to the upper end module 3, it is attached to a cylindrical body portion 4 a, a pair of flange portions 4 b disposed outside both ends of the body portion 4 a, and a lower flange portion. And a blind flange 4c.

  The material of the lower end module 4 can be the same as that of the upper end module 3.

<Advantages>
The said washing | cleaning module is installed in a multi-layer filtration tower, a liquid is ejected from the some nozzle 16, and it is used for the washing | cleaning of the filtration particle 5 of a multi-layer filtration tower. When cleaning the filtered particles 5, the liquid pressure-fed through the plurality of supply pipes 18 and the tower internal pipes 17 can be jetted from the plurality of nozzles 16 into the multilayer filtration tower. The plurality of nozzles 16 inject the liquid in a direction inclined to one side of the circumferential direction with respect to the radial direction of the multi-layer filtration tower, so that a swirl flow can be reliably generated in the multi-layer filtration tower, For this reason, the stirring effect of this filtration particle 5 can be improved at the time of filtration particle washing of a multi-layer filtration tower.

  Further, in the cleaning module, the plurality of nozzles 16 are positioned at substantially the same axial position and substantially equiangular intervals of the multi-layer filtration tower, so that a swirl flow is more reliably generated in the multi-layer filtration tower. Therefore, the stirring effect of the filtered particles 5 can be further improved.

  Moreover, in the said washing | cleaning module, since the several nozzle 16 inclines in the up-down direction of the axial direction of a multilayer filtration tower, the swirl flow formed is not only the component swirling in a horizontal direction but an axial direction. In addition, the flow tends to be a three-dimensional flow having components in the vertical direction, so that the filtered particles 5 can be stirred more efficiently.

  Moreover, in the said washing | cleaning module, by making the annular | circular shaped support member 19 arrange | positioned in the filtration tower support the several nozzle 16 and the piping 17 in a tower, the several nozzle 16 is easily carried out in a filtration tower collectively. Can be arranged. Thereby, the multi-layer filtration tower is easy to install, assemble and maintain.

  Moreover, in the said washing | cleaning module, it comprises a part of outer wall of a multilayer filtration tower, and the external column 7 and multilayer filtration are provided by providing the external column 7 by which the some nozzle 16 and the said piping 17 in a tower are arrange | positioned. By combining with members constituting the other part of the outer wall of the tower, it is possible to easily assemble a multi-layer filtration tower capable of forming a swirling flow and stirring the filtered particles 5 efficiently. For this reason, the multi-layer filtration tower is easy to install, assemble and maintain.

  Moreover, in the said washing | cleaning module, replacement | exchange of the filtration particle 5 is easy by providing the filtration column 6 which accommodates the filtration particle 5. FIG. Further, the plurality of nozzles 16 are installed so as to eject liquid into the filtration column 6, so that the filtered particles 5 can be stirred more efficiently. The cleaning module includes both the filtration column 6 that contains the filtration particles 5 and the nozzle 16 that ejects the liquid into the filtration column 6, so that the nozzle 16 in the liquid ejection direction with respect to the filtration particles 5 is provided. Optimization can be ensured, and the stirring effect of the filtered particles 5 can be obtained more easily and reliably.

[Second Embodiment]
4 and 5 includes a cylindrical outer column 51 constituting a part of the outer wall of the multi-layer filtration tower, and the outer column 51, that is, the multi-layer filtration tower at the outer edge of the multi-layer filtration tower. And a plurality of nozzles 52 disposed so as to penetrate the outer wall of the plurality of pipes and a plurality of pipes 53 for pumping liquid to the plurality of nozzles 52.

  The washing module 50 constitutes another part of the multi-layer filtration tower and is used to form a multi-layer filtration tower by combining with a module containing filtration particles. The multi-layer filtration tower formed using the washing module 50 is also an embodiment of the present invention.

<External column>
The outer column 51 is disposed on the outer side of the upper and lower ends of the cylindrical portion 51a constituting a part of the outer wall of the multi-layer filtration tower, and the other portion of the outer wall of the multi-layer filtration tower. A pair of annular plate-like flanges 51b for connection and a plurality of nozzle connection pipes 51c for opening pipes 53 for supporting the nozzles 52 with one end opened in the body 51a.

  The nozzle connection pipe 51c is inclined to one side in the circumferential direction with reference to the radial direction of the body portion 51a. Accordingly, the nozzle 52 supported by the pipe 53 disposed in the nozzle connection pipe 51c is supported while being inclined to one side in the circumferential direction with respect to the radial direction of the body portion 51a, and liquid is supplied to the inclined direction. Erupts.

  Further, the plurality of nozzle connection pipes 51c are disposed at substantially the same axial position and substantially equiangular intervals of the body 51a. Thus, the plurality of nozzles 52 are located at substantially the same axial direction position and substantially equiangular intervals of the multi-layer filtration tower. The circumferential inclination angle of the plurality of nozzles 52 in the ejection direction in the axial direction and the vertical inclination angle with respect to the horizontal direction can be the same as those of the plurality of nozzles 16 of the cleaning module of FIG.

<Nozzle>
As the nozzle 52, the same nozzle 52 as that of the cleaning module 1 of the multi-layer filtration tower of FIG. 1 can be used. For this reason, the detailed description about the nozzle 52 is abbreviate | omitted.

<Piping>
The pipe 53 is connected to the nozzle connection pipe 51c in a watertight manner. As a method of connecting the pipe 53 to the nozzle connection pipe 51c, a method using a flange as illustrated, a structure similar to the seal mechanism 20 of the cleaning module 1 of the multi-layer filtration tower of FIG.

<Advantages>
In the cleaning module 50, the plurality of nozzles 16 are arranged so as to pass through the outer wall of the multi-layer filtration tower, that is, the outer column 51, so that the plurality of nozzles 52 are arranged as described above with a relatively simple configuration. it can.

[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

  For example, in the cleaning module, the number of nozzles may be any number as long as it is two or more. Further, the number of pipes in the tower in the cleaning module may be any number. For example, only one annular or C-shaped pipe in the tower may be provided to supply liquid to all nozzles.

  In the cleaning module, a plurality of nozzles may be located at different axial positions of the multi-layer filtration tower, and even if angular intervals viewed from the central axis of the multi-layer filtration tower of the plurality of nozzles are not uniform. Good.

  Further, in the cleaning module, the plurality of nozzles may be disposed horizontally without being inclined in the vertical direction, or may be disposed obliquely upward. The cleaning module having an upwardly inclined nozzle is preferably disposed below the filtration layer formed by the filtration particles, but may be disposed above the filtration layer. That is, the vertical inclination of the nozzle of the cleaning module is not limited by the positional relationship between the cleaning module and the filtration layer.

  In addition, the cleaning module may include a nozzle that supplies liquid into the multilayer filtration tower but does not incline in the circumferential direction and does not contribute to the formation of a swirling flow.

  Moreover, in the said washing | cleaning module, also when providing an annular | circular shaped support member, piping which penetrates the outer wall of a multilayer filtration tower may be directly connected to each nozzle, omitting piping in a tower.

  Moreover, even if it is a case where piping in a tower is provided in the said washing | cleaning module, a supporting member can be abbreviate | omitted. That is, the pipe in the tower may be supported on the outer wall of the multilayer filtration tower.

  Moreover, the said washing | cleaning module does not require an external column, a filtration column, and a lid | cover. For example, the cleaning unit of the first embodiment is understood as a cleaning module of one aspect of the present invention alone. Moreover, the said washing | cleaning module may eject a liquid to a filtration column and a vertical direction opposite side from a nozzle.

  In addition, the outer wall of the multilayer filtration tower, that is, the outer column and the shape of the filtration column accommodated inside the outer column are preferably cylindrical in terms of efficiently forming a swirl flow, but have a shape other than the cylindrical shape. May be.

  Moreover, the said washing | cleaning module may be equipped with the filtration column which is not filled with filtration particle | grains. In other words, the cleaning module may be used by the user by filling arbitrary filtration particles.

  Further, the connection between the external column and other components 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 cleaning 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, although it is not essential, by using the cleaning module of the second embodiment, a partial decrease in the flow area of the water to be treated can be suppressed.

  The drain pipe and the cleaning water pipe of the lower end module may share one pipe. Further, the air supply pipe is not essential.

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

DESCRIPTION OF SYMBOLS 1 Washing module 2 Filtration module 3 Upper end module 3a Body part 3b Flange part 3c Blind flange 4 Lower end module 4a Body part 4b Flange part 4c Blind flange 5 Filtration particle 6 Filtration column 7 External column 8 Washing unit 9 Lid 10 Bolt 11 Nut 12 side Frame 13 Porous bottom body 14 Flange 14a Fixing hole 15 Belt 16 Nozzle 17 Tower piping 18 Supply piping 19 Support member 20 Seal mechanism 21 Rib 22 Holding member 23 Fixing hole 24 Frame portion 25 Flange 25a Fixing hole 26 Porous lid 27 Handle 28 Belt 29 Body 30, 31 External flange 30a, 31a Bolt hole 30b Annular groove 32 Mounting flange 32a Screw hole 32b Recess 32c Annular groove 33 Auxiliary flange 34 Reinforcement member 35 Washing water pipe 36 O-ring 37 for outer wall 37 Mounting screw 38 Internal seal Stop O-ring 39 The inclination angle of the water pipe 40 discharge pipe 41 wash water tube 42 the air supply pipe 50 the cleaning module 51 outside the column 51a barrel 51b flange 51c nozzle connecting pipe 52 nozzle 53 tubing θ circumferential direction

Claims (8)

A cleaning module for a multi-layer filtration tower,
A plurality of nozzles disposed at the outer edge of the multi-layer filtration tower;
One or more pipes for pumping liquid to these nozzles,
The cleaning module in which the plurality of nozzles are inclined to one side in the circumferential direction with respect to the radial direction of the multi-layer filtration tower.   The cleaning module according to claim 1, wherein the plurality of nozzles are located at substantially the same axial position and substantially equiangular intervals of the multi-layer filtration tower.   The cleaning module according to claim 1 or 2, wherein the plurality of nozzles are inclined upward or downward in the axial direction of the multilayer filtration tower. The plurality of nozzles are disposed in a multi-layer filtration tower,
As a part of the piping, having a piping in the tower disposed in the multilayer filtration tower,
The cleaning module according to claim 1, 2 or 3, further comprising an annular support member that supports the plurality of nozzles and the piping in the tower and is disposed in the multilayer filtration tower.   The cleaning module according to claim 1, 2 or 3, wherein the plurality of nozzles are disposed so as to penetrate the outer wall of the multilayer filtration tower.   6. The external column according to claim 1, further comprising an external column that constitutes a part of an outer wall of the multi-layer filtration tower and in which the plurality of nozzles and the one or more pipes are disposed. Cleaning module. Further comprising a filtration column containing filtration particles;
The cleaning module according to any one of claims 1 to 6, wherein the plurality of nozzles are installed so as to eject liquid into the filtration column.   A multi-layer filtration tower comprising the cleaning module according to any one of claims 1 to 7.

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