JP3137987U - Backwash type filtration device - Google Patents

Abstract

The present invention provides a backwash type filtration device capable of preventing a breakage of a filtration element or the like from flowing out together with a filtrate.
A filtration element 20 is provided inside a filtration container 10 so as to protrude from a stock solution chamber 10A toward a filtrate chamber 10B. The stock solution side end 21 of the filtration element 20 is disposed on the support plate 15, and the protruding side end 22 is fixed by the fixing plate 17. A filtration surface 23 around which a notched wire is wound is formed on the side surface of the filtration element 20. In addition, a protective filter 40 having a filtration accuracy coarser than that of the filtration surface 23 is disposed between the support plate 15 and the fixed plate 17 around the filtration element 20.
[Selection] Figure 1

Description

  The present invention relates to a backwashing type filtration apparatus provided with backwashing means for filtering a stock solution with a filtration element and backwashing the filtration element.

The backwash type filtration device is used for filtering fuel oil or lubricating oil in, for example, marine internal combustion engines, and is characterized in that it can be continuously operated for a long time. In general, in a filtration device for liquids, if filtration is continuously performed, suspended solid substances in the stock solution accumulate in the filtration element, and the pressure difference between the inside and outside of the filtration element gradually increases due to clogging, resulting in a decrease in filtration efficiency. Resulting in. Therefore, a backwashing type filtration device is provided that has backwashing means for backwashing the filtration element from the direction opposite to the direction of filtration and enables continuous operation for a long time. For example, Patent Document 1 describes an example of a backwash type filtration device. In this backwashing type filtration device, the pressure inside the filtration element is made lower than the outside pressure by the backwashing means, and the filtrate is passed back from the outside to the inside of the filtration element for backwashing.
Japanese Patent No. 3863428

  In such a backwash type filtration apparatus, the filtration element may be taken out from the filtration container, and periodic internal inspection or removal and cleaning of the filtration element may be performed. However, when the filter element taken out from the filter container is again placed in the filter container, it is possible that the filter element will be damaged if the operation is not performed according to the manual. There is a risk of damaging materials flowing out with the filtrate.

  This invention is made | formed based on such a problem, and it aims at providing the backwashing type | mold filtration apparatus which can prevent the broken material of a filtration element, etc. flowing out with a filtrate.

  The backwashing type filtration apparatus of the present invention has a stock solution chamber and a filtrate chamber inside, and is provided with an inlet for flowing the stock solution into the stock solution chamber and an outlet for allowing the filtrate to flow out of the filtrate chamber. The container and the inside of the filtration container are provided so as to protrude from the stock solution chamber toward the filtrate chamber, have a hollow shape, and an opening communicating with the stock solution chamber is formed at the end of the stock solution chamber. The filtration side end is closed, the filtration element having a filtration surface with a wire wound around the side surface between the stock solution chamber side end and the projection side end, and the opening of the filtration element Between the filtration element and the outlet, the backwashing means is connected intermittently, lowers the pressure inside the filtration element below the pressure in the filtrate chamber, and allows the filtrate to pass from the outside to the inside of the filtration surface. Provided with a protective filter that is provided and has a coarser filtration accuracy than the filtration surface. Those were.

  According to the backwash type filtration device of the present invention, since a protective filter is provided between the filtration element and the outlet, it prevents the breakage of the filtration element from flowing out with the filtrate from the outlet. can do. Moreover, since the filtration accuracy of the protective filter is made rougher than that of the filtration surface, an increase in passage resistance can be suppressed and the filtration efficiency can be increased.

  In particular, if the protective filter is sandwiched between the support plate and the fixed plate and arranged so as to surround the periphery of the side surface of the filtration element, the increase in passage resistance is suppressed with a simple configuration, It is possible to prevent the outflow of damaged materials.

  In addition, if a plurality of filtration elements are arranged on the circumference and the backwashing means is rotated so as to be sequentially connected to the plurality of filtration elements, the filter can be backwashed sequentially while being filtered, and the protective filter If the plurality of filter elements are surrounded by the entire filter element, it is possible to more effectively prevent outflow of damaged materials and the like while suppressing an increase in passage resistance with a simple configuration.

  Furthermore, if the rotation of the backwashing means is stopped for a predetermined time when connected to the filtration element, the filtration element can be sufficiently backwashed, and the effect of backwashing can be enhanced.

  In addition, if the protective filter has a net-like member, it is possible to easily prevent the outflow of damaged materials and the like with a simple configuration.

  Furthermore, if the protective filter has a protective mesh having a roughness of 60 mesh or more and 150 mesh or less and a protective mesh having a roughness of 16 mesh or more and 30 mesh or less, the strength can be improved and the damage can be reduced. It is possible to prevent the outflow of objects and the like more reliably.

  In addition, if a reinforcing plate is provided on the outside of the mesh member, the strength can be improved, and the outflow of damaged materials and the like can be more reliably prevented.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a cross-sectional structure of a backwashing type filtering apparatus according to an embodiment of the present invention, and FIG. 2 shows a cross-sectional structure along the line II shown in FIG. . This backwash type filtration apparatus includes a filtration container 10 having a stock solution chamber 10A and a filtrate chamber 10B therein. The filtration container 10 includes a container body 11 having an opening at one end, and a lid 12 that seals the opening of the container body 11. The container body 11 is provided with, for example, an inlet 13 through which the stock solution flows into the stock solution chamber 10A on the side wall on the stock solution chamber 10A side. For example, the filtrate flows out from the filtrate chamber 10B on the side wall on the filtrate chamber 10B side. An outlet 14 is provided.

  In the inside of the filtration container 10, for example, a plurality of filtration elements 20 are provided so as to protrude from the stock solution chamber 10A toward the filtrate chamber 10B. The stock solution chamber side end portion 21 of each filtration element 20 is supported by a flat support plate 15 disposed inside the filtration container 10. The support plate 15 supports the filtration element 20 and divides the inside of the filtration container 10 into a stock solution chamber 10A and a filtrate solution chamber 10B, and is fixed to a locking portion 16 provided on the inner wall of the container body 11. ing. The support plate 15 is provided with a plurality of flow ports 15A corresponding to the positions where the filtration elements 20 are arranged, and steps around the flow ports 15A are provided for arranging the filtration elements 20 respectively. It has been. Further, the protruding side end of each filtration element 20 is fixed by a flat fixing plate 17. The fixing plate 17 is fixed to the support plate 15 by a plurality of fixing bolts 18.

  Each filtration element 20 has a hollow shape such as a cylinder, and an opening that communicates the inside of the filtration element 20 with the stock solution chamber 10 </ b> A is formed in the stock solution chamber side end portion 21, and the protruding side end portion 22 is formed by the fixing plate 17. It is closed. A filtration surface 23 around which a wire such as a notched wire is wound is formed on the side surface between the stock solution chamber side end portion 21 and the protruding side end portion 22 of each filtration element 20. Although the filtration precision of the filtration surface 23 changes with specifications, if it is about 10 micrometers or more and 50 micrometers or less, for example, it is preferable. Moreover, each filtration element 20 is each arrange | positioned with respect to the support plate 15, for example on the same periphery.

  The backwash type filtration device is also intermittently connected to the opening of the filtration element 20, and the pressure inside the filtration element 20 is made lower than the pressure in the filtrate chamber 10 </ b> B, and the filtrate is filtered through the filtration surface 23. The backwashing means 30 is provided for passing the inside from the outside to the inside. The backwashing means 30 includes, for example, a backwashing nozzle 31 that is rotatably arranged, and a backwashing pipe 32 that is connected to the backwashing nozzle 31 and guides the backwashing liquid. The backwash nozzle 31 is, for example, a substantially inverted L-shaped tube, and a rotating shaft 33 for rotating the backwash nozzle 31 is fixedly attached above the vertical portion. The rotating shaft 33 passes through the support plate 15, the fixed plate 17, and the lid 12, is led out of the filtration container 10, and is connected to the drive unit 34. The rotation center of the rotary shaft 33 coincides with the center of the circle in which the filtration element 20 is disposed, and the rotary shaft 33 and the support plate 15, the fixed plate 17 and the lid 12 are hermetically sealed. Has been. The drive unit 34 has a function capable of rotating the rotary shaft 33 either automatically or manually.

  In addition, a connecting pipe 35 that protrudes toward the support plate 15 and communicates with the backwash nozzle 31 is provided at the tip of the horizontal portion of the backwash nozzle 31. The connection pipe 35 is in intimate contact with the support plate 15 and is sequentially connected to the filtration elements 20 by rotating along the support plate 15 according to the rotation of the rotation shaft 33. . In addition, when the backwash nozzle 31 is automatically rotated by the drive part 34, when connected to the filtration element 20, it is preferable to be controlled to stop the rotation for a predetermined time. It is because backwashing can be performed sufficiently.

  This backwash type filtration apparatus further includes a protective filter 40 having a coarser filtration accuracy than the filtration surface 23 of the filtration element 20 between the filtration element 20 and the outlet 14. It is for preventing the broken thing of the filtration element 20, etc. flowing out from the outflow port 14 with a filtrate, suppressing the increase in passage resistance. The protective filter 40 has, for example, a cylindrical shape whose both ends are open, surrounds the periphery of the side surface of the filtration element 20, and is disposed between the support plate 15 and the fixed plate 17. It is preferable. Furthermore, it is more preferable that one protective filter 40 is disposed so as to surround each of the filtration elements 20. This is because, with a simple configuration, an increase in passage resistance can be further suppressed, and the outflow of a damaged object or the like can be prevented. Further, the protective filter 40 is fixed by, for example, a fixing ring 41 provided on the surface of the support plate 15 on the filtrate chamber 10B side.

  FIG. 3 shows an enlarged cross-sectional structure at the upper end of the protective filter 40. The protective filter 40 includes a mesh member 42 made of, for example, a wire mesh having a filtration accuracy coarser than that of the filtration surface 23 of the filtration element 20. The mesh member 42 has, for example, a protective mesh 42A having a roughness of 60 mesh or more and 150 mesh or less, and a protection mesh 42B having a roughness of 16 mesh or more and 30 mesh or less is provided on both sides of the protection mesh 42A. It is preferable that This is because the strength can be improved by combining the protective net 42A and the protective net 42B.

  It is preferable that a reinforcing plate 43 in which a plurality of flow ports 43A that are coarser than the protective mesh 42B are formed is disposed outside the mesh member 42. This is because the strength can be improved and the outflow of damaged materials can be more reliably prevented. The reinforcing plate 43 is made of, for example, punching metal, and the diameter of the flow port 43A is preferably about 10 mm to 15 mm.

  Inside the mesh member 42, strip-shaped mesh pressing plates 44 are disposed at the upper end and the lower end, and are fixed together with the mesh member 42 and the reinforcing plate 43 by spot welding or the like. The mesh holding plate 44 is also disposed at the joint of the mesh member 42 inside the mesh member 42, and is fixed together with the mesh member 42 and the reinforcing plate 43 by spot welding or the like.

  In this backwash type filtration apparatus, the stock solution flows into the stock solution chamber 10A from the inflow port 13 and enters the inside of the filtration element 20 through the flow port 15A of the support plate 15 and the opening of the filtration element 20, and the filtration surface 23 is formed inside. Is filtered by passing to the outside. The filtrate that has passed through the filtration surface 23 passes through the inside of the filtrate chamber 10 </ b> B, passes through the protective filter 40, and flows out of the filtration container 10 from the outlet 14.

  Moreover, in this backwashing type filtration apparatus, for example, the connection pipe 35 of the backwashing means 30 is connected to the opening of one filtration element 20, and the pressure inside the filtration element 20 to which the backwashing means 30 is connected is It becomes lower than the pressure of the filtrate chamber 10B. As a result, the filtrate in the filtrate chamber 10B passes through the filtration surface 23 of the filtration element 20 in the direction opposite to the filtration, that is, from the outside to the inside, and backwashes the deposits adhering to the filtration surface 23. . The backwash liquid obtained by backwashing the filtration surface 23 passes through the opening of the filtration element 20, the flow port 15 </ b> A of the support plate 15, the connection pipe 35, the backwash nozzle 31, and the backwash pipe 32 to the outside of the filtration container 10. Discharged.

  For example, when the backwashing means 30 performs backwashing for one filtering element 20 for a predetermined time, the rotating shaft 33 and the backwashing nozzle 31 are rotated by the drive unit 34, and the connecting pipe 35 rotates along the support plate 15. . When the connecting pipe 35 moves to the opening position of the adjacent filtration element 20, for example, the rotation is stopped for a predetermined time, and the backwashing is performed for a predetermined time. By repeating this sequentially, all the filtration elements 20 are backwashed sequentially while performing filtration continuously. In this backwashing type filtration device, the filtration element 20 is removed when the filtration element 20 is taken out from the filtration container 10 to check the inside or wash the filtration element 20 or when the filtration element 20 is disposed again. However, even if it is damaged for some reason, the protective filter 40 stops the damaged matter and prevents the filtrate from flowing out from the outlet 14 together with the filtrate.

  As described above, according to the present embodiment, the protective filter 40 is provided between the filtration element 20 and the outlet 14, so that a damaged material or the like of the filtration element 20 flows out from the outlet 14 together with the filtrate. Can be prevented. Moreover, since the filtration accuracy of the protective filter 40 is made rougher than that of the filtration surface 23, an increase in passage resistance can be suppressed, and the filtration efficiency can be increased.

  In particular, if the protective filter 40 is sandwiched between the support plate 15 and the fixed plate 17 so as to surround the periphery of the side surface of the filtration element 20, each of the protective filters 40 can further be used. If the entire filtration element 20 is surrounded, it is possible to prevent the outflow of damaged materials and the like while suppressing an increase in passage resistance with a simple configuration.

  In addition, if the protective filter 40 has the net-like member 41 having a coarser filtration accuracy than the filtration surface 23 of the filtration element 20, it is possible to easily prevent the outflow of damaged materials with a simple configuration.

  Furthermore, if the protective filter 40 has a protective mesh 42A having a roughness of 60 mesh or more and 150 mesh or less and a protective mesh 42B having a roughness of 16 mesh or more and 30 mesh or less, the strength can be improved. Therefore, it is possible to more reliably prevent the outflow of damaged materials.

  In addition, if the reinforcing plate 43 is provided on the outside of the mesh member 42, the strength can be further improved, and the outflow of damaged materials and the like can be more reliably prevented.

  Furthermore, if the plurality of filtration elements 20 are arranged on the circumference and the backwashing means 30 is rotated to be sequentially connected to the plurality of filtration elements 20, the backwashing can be performed sequentially while filtering. And continuous filtration for a long time.

  In addition, if the rotation of the backwashing means 30 is stopped for a predetermined time when connected to the filtration element 20, the filtration element 20 can be sufficiently backwashed and the effect of backwashing can be enhanced. .

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the case where the plurality of filtration elements 20 are arranged on the same circumference with respect to the support plate 15 has been described, but two or more circumferences having the same center with respect to the support plate 15 are provided. It may be arranged on the top.

  In the above embodiment, the case where the backwash nozzle 31 is configured by a substantially inverted L-shaped pipe has been described. However, a plurality of horizontal portions are provided with respect to a substantially inverted L-shaped vertical portion, and A connecting pipe 35 may be provided so that two or more filtration elements 20 can be backwashed simultaneously. Furthermore, when the filtration elements 20 are arranged on two or more circumferences, a plurality of connecting pipes 35 are arranged on one horizontal portion of the backwash nozzle 31 so that two or more filtration elements 20 can be connected simultaneously. You may make it backwashable.

  In addition, in the above embodiment, the protective filter 40 is fixed by the fixing ring 41 provided on the surface of the support plate 15, but for example, it is fixed by a groove or a step formed directly on the support plate 15. May be.

  Furthermore, in the above-described embodiment, the configuration of the protective filter 40 has been specifically described. However, other configurations can be used as long as they can prevent the outflow of damaged materials and the like and are rougher than the filtration surface 23. You may have.

  In marine internal combustion engines, it can be used for filtering fuel oil or lubricating oil.

It is sectional drawing showing the structure of the backwashing type | mold filtration apparatus which concerns on one embodiment of this invention. It is sectional drawing along the II line | wire shown in FIG. It is sectional drawing showing the structure of a protection filter.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Filtration container, 10A ... Stock solution chamber, 10B ... Filtrate chamber, 11 ... Container body, 12 ... Lid, 13 ... Inlet, 14 ... Outlet, 15 ... Support plate, 15A ... Distribution port, 16 ... Locking part , 17 ... Fixing plate, 18 ... Fixing bolt, 20 ... Filtration element, 21 ... Stock solution side end, 22 ... Projection side end, 23 ... Filtration surface, 30 ... Backwashing means, 31 ... Backwash nozzle, 32 ... Backwash pipe, 33 ... rotating shaft, 34 ... drive unit, 35 ... connecting pipe, 40 ... protective filter, 41 ... fixing ring, 42 ... mesh member, 42A ... protective net, 42B ... protective net, 43 ... reinforcing plate, 43A ... Distribution port, 44 ...

Claims (7)

A filtration container having an undiluted solution chamber and a filtrate chamber therein, an inlet for allowing the undiluted solution to flow into the undiluted solution chamber, and an outlet for allowing the filtrate to flow out of the filtrate chamber;
Inside this filtration container, it is provided so as to protrude from the stock solution chamber toward the filtrate chamber, has a hollow shape, and an opening that communicates the inside with the stock solution chamber is formed at the end of the stock solution chamber. A filtration element in which the protruding end is closed, and a filtration surface with a wire wound around the side surface between the stock solution chamber end and the protruding end is formed;
Backwashing means that is intermittently connected to the opening of the filtration element, makes the pressure inside the filtration element lower than the pressure in the filtrate chamber, and allows the filtrate to pass from the outside to the inside of the filtration surface. When,
A backwash type filtration apparatus comprising: a protective filter provided between the filtration element and the outlet and having a coarser filtration accuracy than the filtration surface. While separating the inside of the filtration container into a stock solution chamber and a filtrate chamber, supporting the stock solution chamber side end of the filtration element, and a support plate provided with a flow port corresponding to the location of the filtration element; ,
A fixing plate for fixing the protruding end of the filtration element;
The backwashing type filtration apparatus according to claim 1, wherein the protective filter surrounds the side of the filtration element and is disposed between the support plate and the fixed plate. A plurality of the filtration elements are arranged on one or more circumferences having the same center,
The backwashing means is sequentially connected to the plurality of filtration elements by rotating one end portion along the support plate,
The backwashing type filtration apparatus according to claim 2, wherein one protective filter is provided so as to surround the whole of the plurality of filtration elements. The backwashing type filtering apparatus according to claim 3, wherein the backwashing means is controlled to stop rotating for a predetermined time when connected to the filtration element. The backwashing type filtration apparatus according to any one of claims 1 to 4, wherein the protective filter includes a net-like member having a coarser filtration accuracy than the filtration surface. The mesh member has a protective mesh having a roughness of 60 mesh or more and 150 mesh or less and a protection mesh disposed on both sides of the protection mesh and having a roughness of 16 mesh or more and 30 mesh or less. Item 6. The backwash type filtration device according to Item 5. The backwashing type filtration apparatus according to claim 5 or 6, wherein the protective filter includes a reinforcing plate having a plurality of flow ports formed outside the mesh member.

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