JPH0660431U - Solid-liquid separation device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a solid-liquid separation device capable of efficiently cleaning a membrane surface. [Structure] A plurality of flat plate membrane modules 9 are provided in a treatment tank 8.
Are vertically arranged in an upright direction at appropriate intervals and are circumferentially arranged, and a stirring blade 10 for generating a vortex is provided in the tank 8. [Effect] The generated eddy current rises as a horizontal crossflow while hitting the membrane surface, so that the membrane surface can be effectively cleaned.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solid-liquid separation device used in a water treatment facility or the like.

[0002]

[Prior art]

 Conventionally, this type of solid-liquid separation device has a casing 1 provided inside a processing tank as shown in the sectional view showing the entire structure of FIG. 8 (a) and the partially enlarged sectional view of FIG. 8 (b). It is configured by arranging a plurality of membrane modules 2 in parallel at appropriate intervals.

In such a membrane module 2, an organic filtration membrane 4 such as an ultrafiltration membrane or a microfiltration membrane is adhered and fixed on the front and back sides of a rectangular flat plate-shaped membrane support 3. A spacer 5 such as a non-woven fabric is interposed between the organic filtration membrane 4 and the membrane support 3 to prevent the filtration membrane 4 and the membrane support 3 from adhering to each other to form a membrane permeate flow path. . Further, a permeated liquid suction tube 6 communicating with the inside of the filtration membrane 4 is provided, and a negative pressure is applied to the inside of the membrane module 2 through the permeated liquid suction tube 6 to remove the liquid to be treated in the tank from the filtration membrane 4. Through suction filtration in the direction indicated by arrow A.

An aeration device 7 for supplying oxygen or air to the liquid to be treated in the tank is provided below the membrane module 2 in the casing 1, and the aeration device 7 is used to supply oxygen or oxygen from outside the tank as indicated by an arrow B. By taking in air and supplying the bubble flow indicated by the arrow C to the gap between the membrane modules 2, a gas-liquid mixed stirring flow indicated by the arrows C and D is generated in the tank and adhered to the membrane 4 surface. The cake layer is washed.

[0005]

[Problems to be solved by the device]

 However, the above-mentioned conventional solid-liquid separation device has a problem that only the upward stirring flow is used for cleaning the membrane surface, and the membrane surface cannot be efficiently cleaned.

Further, the conventional solid-liquid separation device has a problem that the membrane area is small and the suction filtration cannot be performed efficiently because the membrane module is flat. The present invention solves the above problems, and an object of the present invention is to provide a solid-liquid separation device that can efficiently perform suction filtration and membrane surface cleaning.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the solid-liquid separation device of the present invention has a plurality of flat plate membrane modules arranged circumferentially at appropriate intervals in a treatment tank, and at the same time, agitating to generate a vortex in the tank. A device is provided.

In the solid-liquid separation device of the present invention, the tubular membrane module is arranged in the treatment tank, and the stirring device for generating a vortex is provided in the tank. Further, the solid-liquid separation device of the present invention has a plurality of flat plate-shaped membrane modules or cylindrical membrane modules arranged concentrically at appropriate intervals in the treatment tank, and a stirring device for generating a vortex in the tank. It is provided.

Further, the solid-liquid separation device of the present invention is one in which a membrane module having a spiral cross section is arranged in a treatment tank, and a stirring device for generating a vortex is provided in the tank. Furthermore, the solid-liquid separation device of the present invention has a membrane support having a membrane permeate flow passage on the inside and a filtration membrane arranged on the surface thereof, and formed into a columnar body having a spiral cross section at appropriate intervals. While forming, the outermost surface of this columnar body is covered with a non-filtering material to form a spiral flow path for the liquid to be treated between the membrane supports that are adjacent in the radial direction. The physical fluid flow path is such that one end face corresponding to one end side of the columnar body is closed and the other end face corresponding to the other end side of the columnar body is opened, and the liquid to be treated is passed through the end face on the open side. By providing a supply port for the liquid to be processed communicating with the flow path and providing an outlet for the liquid to be processed at the outermost periphery of the liquid flow path to be processed, the liquid supply port for the liquid to be processed can be fed from the liquid supply port to be processed to the outlet of the liquid to be processed. The liquid to be treated can be supplied in the same direction, and the membrane permeate liquid channel corresponds to the other end side of the cylindrical body. The end surface of the liquid to be treated supply side is closed and the other end surface corresponding to one end side of the cylindrical body is opened, and the membrane permeate suction port communicating with the membrane permeate flow path through the end surface on the open side. Is provided so that the membrane permeated liquid can be sucked through the membrane permeated liquid suction port.

[0010]

[Action]

 As described above, according to the solid-liquid separation device of the present invention, a plurality of flat plate membrane modules are arranged circumferentially or a tubular membrane module is arranged in the treatment tank, or a plurality of flat plate membrane modules are arranged. The flat membrane module or the tubular membrane module is arranged concentrically, or the spiral wound membrane module is arranged, and a stirring device for generating a vortex is provided in the tank, so that the vortex generated is As the horizontal crossflow rises while hitting the membrane surface, the membrane surface can be efficiently cleaned.

Further, according to the solid-liquid separation device of the present invention, the membrane support having the membrane permeate liquid channel inside and the filtration membrane disposed on the surface is formed into a spiral cross section at appropriate intervals. And the outermost surface of this columnar body is covered with a non-filtering material to form a spiral flow path for the liquid to be treated between the membrane supports adjacent in the radial direction. However, when the liquid to be treated is passed through the liquid passage to be treated, the membrane permeate can be taken out by applying suction negative pressure to the liquid permeate passage, so that the membrane area can be made large with a compact shape. Suction filtration can be performed efficiently.

[0012]

【Example】

 The solid-liquid separation device of the present invention will be described below with reference to the drawings. Since the membrane module used in the embodiment shown in FIGS. 1 to 4 has the same structure and function as the membrane module shown in the conventional example, the description thereof is omitted except for the outer shape.

FIG. 1 shows a solid-liquid separation device according to an embodiment of the present invention, in which a processing tank 8 has a circular cross-sectional shape in a plan view, and the cross-section is formed such that the cross section becomes larger toward the top. Inside the tank 8, a plurality of rectangular flat plate-shaped membrane modules 9 are arranged in a vertical shape in a vertically-arranged state at appropriate intervals, and a stirring blade 10 for generating a stirring flow is installed at the bottom. Has been done.

When the stirring blade 10 is operated in the solid-liquid separation device having the above-mentioned configuration, a horizontal spiral swirling flow E is generated at the bottom of the tank 8, and this stirring flow stirs and mixes the liquid to be treated 11 in the tank 8. While rising. At this time, since the membrane modules 9 are circumferentially arranged and the stirring flow is a swirl upward flow, the stirring flow efficiently hits the membrane surface of the membrane module 10 as a horizontal cross flow, and the membrane flow is increased. The surface can be effectively cleaned.

In this solid-liquid separator, the stirring blade 10 is installed at the bottom of the tank 8, but it may be installed at the top or the side of the tank 8 to obtain a similar vortex stirring flow. Hereinafter, examples will be further shown in FIGS. 2 to 4. These examples are modified examples of the example shown in FIG. 1, in which the treatment tank is formed in a circular cross section, and a stirring blade is provided in the tank. Since it is installed in the same way as the embodiment shown in FIG. 1, its explanation is omitted.

In the solid-liquid separation device shown in FIG. 2, a plurality of rectangular flat plate-shaped membrane modules 13 are circumferentially arranged in the tank 12, and the circles are formed into concentric circles with appropriate intervals. It is arranged to be.

In the solid-liquid separation device shown in FIG. 3, a plurality of tubular membrane modules 15 are concentrically arranged in a tank 14 at appropriate intervals. In the solid-liquid separation device shown in FIG. 4, a membrane module 17 having a spiral cross-section is arranged in a tank 16 in a state of standing up and down.

Also in the solid-liquid separation device shown in FIGS. 2 to 4, as in the solid-liquid separation device shown in FIG. 1, a plurality of membrane modules are arranged circumferentially or concentrically, Or, because the single membrane module itself is formed in a spiral shape in cross section, the agitated flow effectively cleans the membrane surface.

Next, FIGS. 5 to 7 show a solid-liquid separator according to still another embodiment. As shown in FIG. 5 and FIG. 6, the solid-liquid separation device 18 arranges the filtration membranes 20 on both sides of the membrane support 19 having a spiral cross-section with the inside communicating with each other, and the outermost surface thereof is non-filterable. By covering with the material 21, the channel 22 for the membrane permeate is formed inside the membrane support 19. The space between the filtration membranes 20 of the membrane supports 19 that are adjacent to each other in the radial direction is used as the flow path 23 for the liquid to be treated.

Further, as shown in FIG. 7, the flow path 23 for the liquid to be treated is closed at one end face 24 corresponding to one end side of the solid-liquid separation device 18 and is connected to the other end side of the solid-liquid separation device 18. The corresponding other end face 25 is open. Further, a detachable flange 26 having an internal space communicating with the flow path 23 for the liquid to be treated is provided on the open end surface 25, and a supply port 27 for the liquid to be treated is provided to the flange 26. Further, an outlet 28 is provided at the outermost periphery of the flow path 23 for the liquid to be treated, so that the liquid to be treated can be supplied and taken out in the direction from the supply port 27 to the outlet 28.

On the other hand, in the flow path 22 for the membrane permeate, the end surface 29 on the flange 26 side is closed and the other end surface 30 is open. Further, a detachable flange 31 having an internal space communicating with the flow path 22 for the membrane permeate is provided on the open end face 30. Further, the flange 31 is provided with a suction port 32, and the membrane permeated liquid can be sucked from the suction port 32 through the flange 31.

Further, the liquid to be treated 23 and the flow passage 22 to the membrane permeate are provided with a liquid drain 33 to be treated and a membrane permeate drain 34 to the outermost periphery, respectively. When performing the treatment, the liquid to be treated is supplied with the solid-liquid separation device 18 installed outside the tank.

Next, the operation of the above configuration will be described. When the liquid to be treated is supplied to the supply port 27, the liquid to be treated is sent from the supply port 27 to the flange 26, passes through the space inside the flange 26, and is sent from the end surface 25 to the flow path 23. Then, it is sent to the inside of the flow path 23 toward the suction port 32, but since the end face 24 on the suction port 32 side is closed, after flowing in the flow path 23 in a spiral shape, it is placed on the outermost periphery of the flow path 23. It is discharged from the outlet 28 provided. At this time, if a negative pressure is applied to the suction port 32, this negative pressure is transmitted to the space inside the flange 31 and the flow path 22, and the liquid to be treated in the flow path 23 is suction-filtered through the filtration membrane 20 and the membrane permeated liquid. Is taken out of the solid-liquid separation device 18 through the suction port 32.

Further, when inspecting and cleaning the inside of the device 18, by removing the flanges 26 and 31, it is possible to inspect and clean from the open end surfaces 25 and 30. Further, by providing the drains 33, 34 with automatic valves, the inside of the device 18 can be automatically cleaned with water or chemicals with the flanges 26, 31 still attached.

[0025]

[Effect of device]

 As described above, according to the present invention, a vortex flow is generated in a treatment tank having a circular cross section, and the vortex flow is a membrane module or a transversely arranged concentric circles arranged at appropriate intervals in the tank. Since it is made to hit the surface spiral type membrane module as a cross flow, the membrane surface can be effectively cleaned and the membrane can be efficiently separated.

Further, according to the present invention, since the membrane device is formed in the spiral shape in cross section to increase the membrane area, the membrane separation efficiency is improved, and the liquid to be treated flow passage and the treated water flow passage are provided inside the device. Since it has the above, the device can be installed outside the tank, and therefore, it is not necessary to lift the device out of the tank. In addition, the inside and outside of the equipment can be inspected and cleaned by opening and closing the flange, and the drain can be automatically cleaned by installing an automatic valve.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a solid-liquid separation device according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing an arrangement of membrane modules in a solid-liquid separation device according to another embodiment of the present invention.

FIG. 3 is an explanatory view showing an arrangement of membrane modules in a solid-liquid separator according to still another embodiment of the present invention.

FIG. 4 is an explanatory view showing the arrangement of membrane modules in a solid-liquid separator according to still another embodiment of the present invention.

FIG. 5 is a sectional view showing a solid-liquid separator according to another embodiment of the present invention.

6 is a partially enlarged view of the solid-liquid separation device of the embodiment of FIG.

FIG. 7 is an explanatory diagram showing the overall configuration of the solid-liquid separation device of the embodiment of FIG.

FIG. 8 is an explanatory diagram showing a configuration of a conventional solid-liquid separation device.

[Explanation of symbols]

 8 Treatment Tank 9 Flat Membrane Module 10 Stirring Blade (Stirrer) 19 Membrane Support 20 Filtration Membrane 22 Membrane Permeate Flow Path 23 Processed Liquid Flow Path 27 Supply Port 28 Outlet Port 32 Suction Port

Claims (5)

[Scope of utility model registration request] 1. A solid-liquid separation device comprising a plurality of flat plate membrane modules arranged circumferentially at appropriate intervals in a treatment tank and an agitator for generating a vortex in the tank. . 2. A solid-liquid separation device, wherein a tubular membrane module is arranged in a treatment tank, and a stirring device for generating a vortex is provided in the tank. 3. The solid-liquid separation device according to claim 1, wherein a plurality of flat plate membrane modules or tubular membrane modules are concentrically arranged at appropriate intervals in the treatment tank. 4. A solid-liquid separation device, wherein a membrane module having a spiral cross section is arranged in a treatment tank, and a stirring device for generating a vortex is provided in the tank. 5. A membrane support having a membrane permeate liquid channel inside and a filtration membrane arranged on the surface is formed into a columnar body having a spiral cross section at appropriate intervals, and the circle is formed. By covering the outermost surface of the columnar body with a non-filterable material, a swirl-shaped liquid passage for treatment is formed between the membrane supports that are adjacent in the radial direction, and the liquid passage for treatment has the circular shape. The one end face corresponding to one end side of the columnar body is closed and the other end face corresponding to the other end side of the columnar body is opened, and the liquid to be treated communicated with the liquid to be treated passage through the end face on the open side. The supply port of
Moreover, by providing an outlet for the liquid to be treated at the outermost periphery of the liquid passage to be treated, the liquid to be treated can be supplied from the liquid supply inlet for the liquid through the liquid passage to be treated in the direction of the outlet, and the membrane permeation The liquid flow path closes the end surface on the side of the liquid to be treated corresponding to the other end side of the cylindrical body and opens the other end surface corresponding to one end side of the cylindrical body, A solid-liquid separation device characterized in that a membrane permeate suction port is provided which communicates with a membrane permeate flow path through an end face, and the membrane permeate can be sucked from the membrane permeate suction port.