JP7368883B1 - oil water separator - Google Patents

Abstract

An object of the present invention is to provide an oil-water separator in which a processing tank container 20 can be easily placed above a base part 100 in a stable manner, ensuring rigidity and strength, and can be easily maintained. The oil-water separator has a processing tank container 20 filled with an adsorbent that adsorbs oil, and the processing tank container 20 has a base part in a self-supporting state with its axis vertically erected. It is formed into a cylindrical shape so as to be installed directly or through an intervening material, and is provided with a sealing flange part 21 at the lower end, and the sealing flange part 21 has a sealing flange part 21 attached to the lower end of the processing tank container 20. A lower end closing part 25 that closes the lower end part and an installation connecting part 77 connected to the base part 100 side are provided, and the lower end part of the processing tank container 20 is provided as a space that is not filled with the adsorbent. A treatment tank inlet 81 is provided on the cylindrical peripheral side wall so as to communicate with the empty space 41 of the water introduction part to be treated from the outside. [Selection diagram] Figure 1

Description

The present invention relates to an oil-water separator in which a treatment tank container is filled with an adsorbent that adsorbs oil so that the water to be treated is purified by adsorbing the oil contained in the water.

In a conventional oil-water separator, a first opening extending from the other opening of the cylinder to the opening of the cylinder that constitutes the filter container in which the oil adsorbent is placed has a placement part defined on the opening side of the cylinder. Four movement-restricting convex portions are formed to restrict the movement of the plate within the cylinder in the direction of the cylinder, and the plate is placed inside the cylinder so that the plate surface is orthogonal to the longitudinal direction of the cylinder. Four contact avoidance recesses are formed corresponding to the formation positions of each convex part on the cylinder body, which can avoid contact of the plate material with each convex part when the cylinder body is moved along the length direction of the cylinder. At the same time, the convex abutting portion defined in the outer edge region excluding the forming portion of each concave portion is pressed against each convex portion in the above-mentioned first direction by the oil adsorbent in the filter container. The present applicant has proposed an oil/water separator that is disposed in an arrangement portion in a state where movement in one direction is restricted (see Patent Document 1).

In addition, in a compressed air dehumidifier that generates drain water, which is an example of water to be treated, its drain discharge circuit device communicates with a drain outlet provided at the bottom of a drain receiving tank to guide drain liquid downward. A drain discharge channel for discharging the drain, a drain discharge opening/closing valve for opening and closing the drain discharge channel, and a pressure gas reservoir by communicating between the gas space of the drain receiving tank and the pressure gas reservoir of the drain discharge channel. A pressurized gas venting line is provided, one end of which is disposed in the gas space, and the other end of which is disposed in the pressurized gas reservoir, so as to remove pressurized gas from the drain discharge flow path. A drain tank is connected as a part to enlarge the flow path so that drain liquid can be stored closer to the drain discharge on/off valve than the other end of the pressure gas vent pipe (Patent Document 2) has been proposed by the applicant.

As an example, in the oil-water separator according to the present invention, drain water generated in a compressed air dehumidifier and pumped together with compressed air is introduced as water to be treated via the drain discharge circuit device of Patent Document 2, and the This equipment can be used extremely effectively when adsorbing and purifying oil contained in treated water.

Japanese Patent Application Publication No. 2011-255295 (page 1) JP 2019-55347 (Page 1)

The problem to be solved regarding oil-water separators is that in conventional oil-water separators, as shown in FIG. 1 of Patent Document 1, for example, the treatment tank container and the gas-liquid separation chamber are By connecting the flanges vertically, a watertight seal for the flow path of the water to be treated and installation above the base are achieved at the same time, making the structure itself simple. However, when performing maintenance, disassembly and assembly are difficult. In other words, during maintenance, there is a risk that the water to be treated may leak due to the work of separating the treatment tank container and the gas-liquid separation chamber into two parts, and that assembly work on site requires watertight sealing between flanges. The workability of these processes is worsening, as they become complicated and complicated.

Therefore, an object of the present invention is to provide an oil-water separator which can be rationally and easily installed, and can be maintained and maintained in a manner that allows the treatment tank container to be placed stably above the base part and ensure rigidity. Our goal is to provide the following.

The present invention includes the following configuration to achieve the above object.
According to one embodiment of the oil-water separator according to the present invention, the treatment tank container is filled with an adsorbent that adsorbs oil so that the water to be treated is purified by adsorbing the oil contained in the water. The treatment tank container is arranged in a cylindrical shape so that the treatment tank container is installed directly or through an intervening member on the base part in a free-standing state with the axis erected in the vertical direction. The sealing flange includes a lower end closing part that closes the lower end of the processing tank container, and an installation connecting part connected to the base part side. is provided at the lower end of the treatment tank container, and the empty space of the water introduction part to be treated, which is provided as a space not filled with the adsorbent, and the empty space of the water introduction part to be treated are connected from the outside. and an inlet of the processing tank provided on the cylindrical circumferential side wall so that the processing tank is opened.

Further, according to one embodiment of the oil-water separator according to the present invention, an empty space of a treated water outlet section provided as a space not filled with the adsorbent is provided at the upper end of the treatment tank container, and and an outlet of the processing tank provided to communicate with the outside from the empty space of the water outlet, and a hanging part for hanging is provided at the center of the upper surface of the upper end closed part of the processing tank container. It can be characterized by being present.

Further, according to one embodiment of the oil-water separator according to the present invention, the water to be treated is drain water generated from compressed air, and the compressed air containing the drain water is introduced into a space where gas-liquid separation is performed. A gas-liquid separation chamber provided to form a gas-liquid separation chamber is installed as the inclusion on the base part, and the processing tank container is installed on the gas-liquid separation chamber. be able to.

Moreover, according to one form of the oil-water separator according to the present invention, the treatment tank container is provided to be divided into at least two vertically, a pre-treatment tank and a post-treatment tank, the pre-treatment tank and the post-treatment tank. The sealing flange portion may be provided at the lower end of each of the sealing flange portions.

Moreover, according to one form of the oil-water separator according to the present invention, an operation part is installed on the base part in an independent state.
Moreover, according to one form of the oil-water separator according to the present invention, a plurality of the processing tank containers may be installed in a self-supporting state on the base portion.

Further, an embodiment of the oil-water separator according to the present invention may be characterized in that the operating section and the plurality of processing tank containers are installed in a self-supporting state on the base section.

According to the oil-water separator according to the present invention, the treatment tank container can be easily placed above the base part, has a form that ensures rigidity, can be rationally and easily installed, and can be easily maintained. It has the particularly advantageous effect of being able to

FIG. 1 is a perspective view showing an example of an oil-water separator according to the present invention. 1 is a perspective exploded view of an example of an oil-water separator unit according to the present invention. FIG. 3 is a perspective view showing an assembled state of the embodiment shown in FIG. 2; 1 is a central vertical cross-sectional view showing an example of the form of an oil-water separator according to the present invention. FIG. 5 is a perspective exploded view of the embodiment shown in FIG. 4; 1 is a perspective exploded view showing an example of the form of a treatment tank container of an oil-water separator according to the present invention. FIG. 2 is a perspective view showing an example of a form related to holding filled adsorbent by a holding plate in a processing tank container of an oil-water separator according to the present invention. FIG. 8 is a perspective exploded view of the embodiment shown in FIG. 7; FIG. 2 is a central vertical cross-sectional view schematically showing an example of the arrangement of adsorbents in the oil-water separator according to the present invention.

Hereinafter, embodiments of the oil-water separator according to the present invention will be described in detail based on the accompanying drawings (FIGS. 1 to 9). In addition, in this embodiment, an oil-water separator filled with an adsorbent that adsorbs oil is installed in the treatment tank container 20 so that the water to be treated is purified by adsorbing the oil contained in the water. It has become.

According to the oil-water separator according to the present invention, the treatment tank container 20 is placed directly on the base part or through an intervening material in a free-standing state with its axis erected in the vertical direction (substantially vertical direction). It is formed into a cylindrical shape so that it can be installed, and has a sealing flange part 21 at the lower end, and the sealing flange part 21 has a lower end closing part 25 (see FIG. 6) that closes the lower end of the processing tank container 20. ) and an installation connecting part 77 (see FIGS. 1, 2, 4, and 5) connected to the base part 100 side.

As shown in FIGS. 1 and 6, the sealing flange portion 21 of this embodiment is a lower end flange fixedly provided at the lower end of the cylindrical processing tank container 20 in a doughnut-shaped form projecting outward. 24, a packing 23 for watertight sealing, a disk-shaped lower end closing portion 25, and a fastening member composed of a bolt, nut, and washer. Further, in this embodiment, a connecting hole 26 for connecting to a gas-liquid separation chamber 70, which will be described later, is provided in the sealing flange portion 21 as an installation connecting portion 77. The base portion 100 (base portion) serves as a base for supporting the processing tank container 20, and is provided with a pair of fork claw insertion holes 101 so that it can be transported by a forklift, as shown in FIG. ing.

According to the oil-water separator according to the present invention, as shown in FIG. The inlet 81 of the treatment tank (pretreatment tank The processing tank inlet 81A) is provided.

According to the oil-water separator according to the present invention, the treatment tank container 20 can be easily placed above the base part 100 and has a form that can ensure rigidity and strength, and can be installed rationally and easily, and can be maintained and maintained. This has the particularly advantageous effect of being easy to perform. That is, in the present invention, the cylindrical shape and the shape of the sealing flange portion 21 form a pressure vessel, and the structural rigidity can be increased. It can be stably mounted on the upper surface of the installation side, such as the upper surface of the section 100 or the upper end surface of the gas-liquid separation chamber 70 (the upper surface of the upper end closing section 78 of the chamber), which will be described later. More specifically, regarding this embodiment, due to the shape of the sealing flange portion 21 including the lower end closing portion 25, the lower end surface of the lower end closing portion 25 and the upper surface of the upper end closing portion 78 of the chamber (see FIG. 5) The processing tank container 20 can be stably placed on the gas-liquid separation chamber 70 by bringing the surfaces of the two into direct contact with each other. Furthermore, the flow path for introducing the water to be treated can be easily connected to communicate from the outside to the inside at the inlet 81 of the treatment tank provided on the peripheral side wall (peripheral side wall 20A of the pretreatment tank), which is rational and Easy to install.

In addition, in this embodiment, the water to be treated introduced from the gas-liquid separation chamber 70 into the processing tank container 20 is in a state where it can freely move without being substantially biased within the empty space 41 of the water introduction portion to be treated. becomes. Therefore, the water to be treated introduced into the empty space 41 evenly fills the cylindrical treatment tank container 20, and the treatment tank container 20 is placed on the top surface of the base portion 100 or the top of the gas-liquid separation chamber 70. It can be stably placed on the upper surface of the installation side such as an end surface. In addition, the water to be treated can flow in a state in which it comes into substantially balanced contact with the entire surface of the adsorbent exposed on the lower surface of the treatment tank container 20, and the oil content is evenly distributed throughout the filled adsorbent. will be adsorbed, and will be efficiently purified so that the amount of oil adsorbed by the adsorbent as a filter can be increased and its service life can be extended.
Furthermore, by providing a connecting portion from the inlet 81 of the processing tank on the outside of the cylindrical circumferential wall, there is no structure inside, so that it can be easily disassembled and cleaned during maintenance.

In addition, in this embodiment, an empty space 44 (see FIG. 4) of the treated water outlet provided at the upper end of the treatment tank container 20 as a space not filled with the adsorbent, and an empty space 44 (see FIG. 4) of the treated water outlet. A processing tank outlet 82 is provided to communicate with the outside from the space 44, and a hanging part 95 for hanging is provided at the center of the upper surface of the upper end closing part 27 of the processing tank container 20. . In this embodiment, a hanging part 95 for hanging is provided at the center of the upper surface of the upper end closing part 27B of the after-treatment tank (B), which constitutes the upper end surface of the after-treatment tank (B). It is located on an extension of the axis.

In addition, as shown in FIG. 1 etc., the hanging part 95 of this embodiment is an eye bolt, and is welded to the center part of the upper surface of the upper end closing part 27 of the processing tank container and has a U-shaped cross section. It is arranged in a state where it is screwed into a nut fixed to the channel steel material. According to this, the hanging part 95 for hanging can be arranged above the center of gravity of the processing tank container 20, and the oil-water separator according to the present invention can be moved and transported by being lifted up in a well-balanced manner by the hook.

In addition, the outlet 82 of the treatment tank in this embodiment is provided on the cylindrical peripheral side wall (the peripheral side wall 20B of the post-treatment tank) so as to communicate with the outside from the empty space 44 of the treated water outlet. Flow path piping such as a drain pipe communicating with the outlet 82 of the processing tank can be appropriately connected without being obstructed by the hanging part 95. Note that the present invention is not limited to this, and as long as the portion communicates with the empty space 44 of the treated water outlet, even the upper end closing portion 27 (the upper end closing portion 27B of the post-treatment tank) may be suspended. Of course, the outlet 82 of the processing tank may be disposed by making a through hole in a portion where the hanging portion 95 for hanging does not substantially interfere. The treated water that has passed through the adsorbent and been purified has low resistance to water passage within the empty space 44 at the treated water outlet and can move freely without being substantially biased. Therefore, if the outlet 82 of the treatment tank communicates with the empty space 44 of the treated water outlet, the treated water will pass more evenly through the entire adsorbent and be purified, resulting in a state where water flow resistance is small. Then, it will be properly discharged. In addition, in this embodiment, as shown in FIG. 6, connection holes 29 are provided in the bracket portions 28 that are provided in two locations on the upper end of the peripheral side wall of the processing tank container 20 in a shape that projects outward. It has a configuration in which processing tanks can be connected in multiple stages.

Further, in the oil-water separator of this embodiment, the water to be treated is drain water generated from compressed air, and the compressed air containing the drain water is introduced to form a space where gas-liquid separation is performed. A gas-liquid separation chamber 70 is installed as the intervening member on the base portion 100, and the processing tank container 20 is installed on the gas-liquid separation chamber 70. Note that the gas-liquid separation chamber 70 of this embodiment is formed in a cylindrical shape similarly to the processing tank container 20, and is in the form of a pressure vessel that is structurally strong against internal pressure.

According to this, it is possible to rationally configure an oil-water separator that can process compressed air introduced from the drain section of the compressed air dehumidifier and drain water. In other words, in an oil-water separator where compressed air with a pressure higher than atmospheric pressure is introduced, the oil, which has a lighter specific gravity than water and is easier to separate in the direction of floating, is more evenly distributed over the entire horizontal cross section of the treatment tank by the adsorbent. The method of this embodiment in which the water to be treated flows from the bottom to the top to adsorb oil can be rationally applied. In this embodiment, the processing tank container 20 is installed on top of the gas-liquid separation chamber 70, so in order to minimize the installation floor area, the overall shape is rationally designed to stand up vertically. can be placed. Note that the pressure of the compressed air is higher than atmospheric pressure, and can be set to a desired pressure within a range of about 2 atm to 10 atm, for example.

In addition, in this embodiment, as shown in FIGS. 1 and 2, the installation fixing portion 75 is provided at three locations (such as a circumference with an angle of 120 degrees, etc.) to fix the gas-liquid separation chamber 70 to the base portion 100. minute position). According to this, the number of fixing parts 75 for installation can be minimized, and the installation work becomes easy. Note that the present invention is not limited to this, and it goes without saying that the number of installation fixing parts 75 may be provided at four or more locations.

As a specific example of the configuration of the installation fixing part 75 according to this embodiment, a bracket part 74 at the lower end of the chamber, which is provided at three locations on the lower end of the circumferential wall of the gas-liquid separation chamber 70 in a shape protruding outward, is attached to the bracket part 74 at the lower end of the chamber. A fixing hole 74a is provided, and the gas-liquid separation chamber 70 is fixed to the base portion 100 by a fixing means 74b composed of bolts, nuts, and washers.

In addition, in this embodiment, as shown in FIGS. 1 and 5, as a connection form between the gas-liquid separation chamber 70 and the processing tank container 20, the installation connection portion 77 is provided at two locations (at opposite positions with an angle of 180 degrees). ). According to this, the number of connection parts 77 for installation can be minimized, and installation work becomes easy. Note that the present invention is not limited to this, and it goes without saying that the number of installation connecting portions 77 may be provided at three or more locations.

As a specific example of the configuration of the installation connecting portion 77 according to this embodiment, a bracket portion 76 at the upper end of the chamber, which is provided in two locations on the upper end of the circumferential wall of the gas-liquid separation chamber 70 in a shape protruding outward, is attached to the bracket portion 76 at the upper end of the chamber. The connecting hole 76a is provided at two locations (opposite positions with an angle of 180 degrees) on the sealing flange portion 21 (sealing flange portion 21A at the lower end of the pretreatment tank) of the processing tank container 20 (pretreatment tank (A)). A connecting hole 26 (connecting hole 26A at the lower end of the pre-treatment tank) is provided in the tank, and the processing tank container 20 is connected to the gas-liquid separation chamber 70 by a fastening member composed of bolts, nuts, and washers. There is.

The connection from the gas-liquid separation chamber 70 of the flow path of the water to be treated according to this embodiment to the treatment tank container 20 is performed using a pipe joint installed to constitute an outlet 73 of the chamber, as shown in FIG. A communication tubular section 80 for supplying water to be treated is formed by a pipe joint installed to constitute an inlet 81 of the treatment tank, and a connecting tube 80a connected between both pipe joints. There is. This flow path connection work is a connection between a pipe joint and a pipe, and can be easily performed because the connection is made outside the gas-liquid separation chamber 70 or the processing tank container 20. Note that by making the connecting tube 80a transparent, it is possible to appropriately check the flow state and draining state of the water to be treated.

Note that the compressed air containing the water to be treated is introduced into the gas-liquid separation chamber 70 from the inlet 72 of the chamber, and by separating the gas and liquid, the upper side of the interior becomes a gas phase part 72a due to the action of gravity, and the water to be treated is The treated water descends, and the lower side of the interior becomes a liquid phase portion (drain water retention space 73a) in which the treated liquid is retained. Therefore, in this embodiment, the inlet 72 of the chamber into which the compressed air containing the water to be treated is introduced is provided on the upper side of the peripheral wall 71 of the chamber, and the outlet 73 of the chamber through which the water to be treated is discharged is provided. , is provided on the lower side (bottom side) of the peripheral side wall 71 of the chamber. Further, in this embodiment, the upper end closing portion 78 of the chamber constitutes the top plate of the gas-liquid separation chamber 70, and the lower end closing portion 79 of the chamber constitutes the bottom plate of the gas-liquid separation chamber 70.

Further, in this embodiment, the processing tank container 20 is provided at least vertically divided into two parts: a pre-processing tank (A) and a post-processing tank (B). ) are provided with sealing flange portions 21A, 21B at the lower end of each. More specifically, as shown in FIGS. 5 and 6, the sealing flange portion 21A at the lower end of the pretreatment tank is fixed to the lower end of the peripheral side wall 20A of the pretreatment tank in a doughnut-shaped form extending outward. The lower end flange 24A of the pretreatment tank provided, the packing 23A of the pretreatment tank that provides a watertight seal, the lower end closing part 25A of the pretreatment tank, and the connection of the lower end of the pretreatment tank as part of the connection part 77 for installation. The structure includes a hole 26A. Further, the sealing flange portion 21B at the lower end of the after-treatment tank is connected to the lower end flange 24B of the after-treatment tank, which is fixed to the lower end of the circumferential side wall 20B of the after-treatment tank and protrudes outward in a donut shape. It is configured to include a packing 23B of the aftertreatment tank for sealing, a lower end closing part 25B of the aftertreatment tank, and a connection hole 26B at the lower end of the aftertreatment tank as part of the front and rear tank connection part 35. According to this, since the processing tank container 20 is divided, maintenance can be easily performed, and the structure strength and rigidity can be increased by the flange shape, and the independence of the entire shape can be increased. Note that the sealing flanges 21A and 21B have an assembled structure that cannot be disassembled by the user because they will be disassembled when the treatment tank container 20 that has reached the end of its adsorption life is returned to the recycling factory and refilled with adsorbent, as will be described later. (Special screws are an example).

Further, in the present embodiment shown in FIG. 2, the operation section 200 can be configured to be installed on the base section 100 in an independent state. Furthermore, a plurality of processing tank containers 20 can be installed on the base portion 100 in a self-supporting state. According to this, it is possible to increase variations in the device unit.
Note that specific locations and members related to the pre-treatment tank (A) are designated by the symbol A, and specific locations and members related to the post-treatment tank (B) are designated by the symbol B. For example, the sealing flange part for the pre-treatment tank (A) is 21A, the packing is 23A, the lower end flange is 24A, the lower end closing part is 25A, the connecting hole is 26A, and the sealing flange part for the post-treatment tank (B) is 24A. The part is 21B, the packing is 23B, the lower end flange is 24B, the lower end closing part is 25B, and the connecting hole is 26B.

Next, embodiments of the oil-water separator unit related to the present invention will be described in detail based on the accompanying drawings (FIGS. 2, 3, etc.). Note that this oil-water separator unit is an oil-water separator unit in which the treatment tank container 20 is filled with an adsorbent that adsorbs oil so that the water to be treated is purified by adsorbing the oil contained in the water. It is an oil-water separator unit equipped with a container.

According to the oil-water separator according to the present invention, the treatment tank container 20 is placed on the base portion 100 directly or through an intervening object in a self-supporting state with its axis erected in the vertical direction (substantially vertical direction). It is formed into a cylindrical shape so that it can be installed. In this embodiment, a sealing flange portion 21 is provided at the lower end of the processing tank container 20, and the sealing flange portion 21 includes a lower end closing portion 25 that closes the lower end of the processing tank container 20, and a base portion 100. An installation connecting portion 77 connected to the side thereof is provided.

According to the oil-water separator unit according to the present invention, the unit is formed of a plate-like member without a frame structure and is supported by the base portion 100 so as to cover and protect the processing tank container 20. A cover part 90 is provided. Further, in this embodiment, as shown in FIGS. 2 and 3, an operating section 200 is installed on the base section 100 in an independent state, and the operating section 200 covers the processing tank container 20 and the base section 100. It is part of the component. That is, in this embodiment, there is no frame skeleton structure (structure including pillars and beams serving as the skeleton of the casing) for strongly forming the box on the base part, and the upper part is used as a member constituting the cover part 90. There is a plate 91, a back plate 92, and left and right side plates 93, 93, and an operation unit 200 such as an operation panel or a power distribution board is arranged as a part that covers the front surface. In addition, in a form in which the operation unit 200 is not arranged like this example, the front side is also provided with a plate similar to the top plate 91, back plate 92, and left and right side plates 93, 93 as part of the cover part 90. Of course, it can be constructed by a member having a shape.

According to the oil-water separator unit according to the present invention, the cover section 90 constituted by a plate-like member can operate the oil-water separator without providing a frame skeleton structure for forming a box on the base section 100. It has the particular advantage of being able to cover effectively. In other words, according to this oil/water separator unit, the structure of the unit can be simplified, thereby reducing weight and manufacturing costs, and achieving sufficient performance and structural strength as an oil/water separator. The structure satisfies the installation conditions, including the specifications, with just the right amount, and avoids having excessive configurations.

Furthermore, in this embodiment, since the operating section 200 is also used as a member constituting the front surface of the cover section 90, there is no need to provide a casing plate material for the front surface, and the structure of the cover section 90 is simplified. Manufacturing costs can be reduced. Note that the present invention is not limited to this configuration, and even if the operating section 200 is not provided as in this embodiment, the front surface, which is a part of the cover section 90, may be provided with the upper plate 91, the back plate 92, or the left and right sides. It may be constructed in a plate shape using a casing plate material such as that which constitutes the side plate 93 of.

The reason why the cover part 90 can be configured in this way is first that the processing tank container 20 according to the present invention is formed in a cylindrical shape, which increases the pressure resistance strength and rigidity of the processing tank container 20 itself. This is because the structural strength of the vessel is sufficiently high as a pressure vessel, it can be properly installed in an independent state, and there is no need for a casing to strongly protect the surrounding area.

Another reason why this cover part 90 can be configured is that the processing tank container 20 according to the present invention has sufficiently high form strength as described above, and when being transported, it can be hung with eye bolts etc. as described above. A hanging part 95 for use is provided directly on the upper end, so that it can be directly lifted. For this reason, it is not necessary to provide a strong frame skeleton structure, attach a hanging part such as an eye bolt to the frame skeleton structure, and lift it up for movement and transportation.

In this embodiment, as described above, a hanging portion 95 for hanging is provided at the center of the upper surface of the upper end closing portion 27 of the processing tank container. That is, as shown in FIGS. 1 to 3, the hanging part 95 of this embodiment is an eye bolt, and can be moved and transported by hooking it and lifting it in a well-balanced manner. Therefore, a frame skeleton structure is not required, and weight reduction and manufacturing cost can be reduced. In this embodiment, a through hole 91a is provided in the center of the upper plate 91 constituting the cover part 90, and the threaded part of the eye bolt is inserted into the through hole 91a from above to close the upper end of the processing tank container. It is screwed into a nut fixed to a channel steel material fixed to the center part of the upper surface of the part 27, and the hooked part of the eye bolt is exposed on the upper surface.

Furthermore, another reason why this cover part 90 can be configured is that the oil-water separator according to the present invention is not equipped with a power device, so severe vibrations are not transmitted and the temperature does not rise. . Therefore, there is no need to increase the strength of the cover portion 90, and a strong frame skeleton structure is not required.

Further, according to this embodiment, the four sides surrounded by the top plate 91, the back plate 92, and the left and right side plates 93 do not have a frame skeleton structure, so that they are not obstructed by the members constituting the frame skeleton structure. It can be opened widely, making it possible to more appropriately provide open space for maintenance, etc.

Moreover, as an embodiment of the oil-water separator unit according to the present invention, at least a portion of the cover portion 90 may be made of a renewable material that does not rely on metal materials. According to this, the 3Rs can be suitably realized by reducing the weight of the oil/water separator unit (product), reusing it with renewable materials, and recycling it, thereby contributing to reducing the environmental load. A specific example of the recyclable material is cardboard. The cover part 90 made of corrugated cardboard has high heat insulation properties and high water absorption and oil absorption properties, so it has a simple structure, but it has advantages such as being able to form a casing with excellent heat retention effect to prevent freezing in winter. There is.

Further, as an example of the form of the oil-water separator unit according to the present invention, the recyclable material is a cardboard, and the cover part 90 is made of the cardboard, and the cover part 90 accommodates the treatment tank container 20. A fold line for forming a storage box may be provided to form a storage box. According to this, when maintaining the oil-water separator unit, the cover part 90 can be used as a packing material when transporting the treatment tank container 20, and reuse and recycling can be suitably performed. In this embodiment, the members constituting the processing tank container 20 are also made of renewable materials that can be reused or recycled.
More specifically, when the adsorption life approaches the end of the adsorption life, the person in charge of maintenance arranges for a new processing tank container 20 to replace the processing tank container 20 that has reached the end of its adsorption life. Since the new processing tank container 20 is made of only renewable materials, it is reused at the recycling factory by other users, refilled with new adsorbent, and stored in a new cover part 90 before being sent. It's coming. Then, the processing tank container 20 is replaced with a new processing tank container 20 and a new cover part 90, and the (old) processing tank container 20, which has reached the end of its adsorption life, is stored in the (old) cover part 90 before replacement and sent back to the recycling factory. At this time, the adsorbents in the processing tank container 20 that have reached the end of their adsorption life are thermally recycled, and the holding plate (sheet metal) 45 and fixing fittings 49 are reused. Further, since the (old) cover part 90 used as an example is made of cardboard, which is a recyclable material, it is taken over by a recycling company and recycled. In this way, the environmental load can be reduced by using renewable components.

Next, an embodiment of an oil-water separator related to the present invention will be described in detail based on the attached drawings (FIGS. 4, 5, etc.). In addition, in this embodiment, a cylindrical treatment tank is formed through which the water to be treated passes from the bottom to the top so that the water to be treated is purified by adsorbing oil contained in the water. This is an oil-water separator in which an adsorbent that adsorbs oil is filled in a processing tank container 20 provided in the tank.

According to the oil-water separator according to the present invention, the treatment tank container 20 is divided into two or more parts, the pre-treatment tank (A) and the post-treatment tank (B) whose lower end is closed, and The post-treatment tank (B) is installed so as to be stacked on top of the pre-treatment tank (A) so as to stand up and form a columnar shape.
That is, in this embodiment, it is divided into two parts: a pre-treatment tank (A) which is a lower part and a post-treatment tank (B) which is an upper part, and the liquid level of the water to be treated is from the bottom. The structure is such that pressure is applied so that it rises upwards and becomes full. In addition, in this embodiment, the processing tank container 20 is divided into two parts, a pre-processing tank (A) and a post-processing tank (B), but the present invention is not limited to this, and is divided into three parts. It may also be in a form divided into the above parts.

According to the oil-water separator according to the present invention, as shown in FIG. 4, an empty space 42 on the upstream side is provided at the upper end of the pretreatment tank (A) as a space not filled with the adsorbent. The adsorbent is filled in the outlet 82A of the pre-treatment tank provided on the circumferential wall 20A of the pre-treatment tank so as to communicate with the outside from the empty space 42 on the upstream side, and the lower end of the post-treatment tank (B). An empty space 43 on the downstream side that is provided as a space where the post-processing tank is not used, and an inlet 81B of the post-processing tank provided on the peripheral wall 20B of the post-processing tank so as to communicate with the empty space 43 on the downstream side from the outside. A communicating tubular portion 83 is provided to connect and communicate the outlet 82A of the pre-treatment tank and the inlet 81B of the post-treatment tank so as to communicate the empty space 42 on the upstream side and the empty space 43 on the downstream side.

Note that the communication tubular portion 83 of this embodiment includes an upstream pipe joint that constitutes an extension of the outlet 82A of the pretreatment tank that communicates with the empty space 42 on the upstream side, and an aftertreatment tube that communicates with the empty space 43 on the downstream side. It is composed of a downstream pipe joint that constitutes an extension of the inlet 81B of the tank, and a connecting tube 83a that is connected between the upstream pipe joint and the downstream pipe joint, and connects the empty space 42 on the upstream side and the downstream pipe joint. A flow path for the water to be treated is formed which communicates with the empty space 43 of. This flow path connection work is a connection between a pipe joint and a pipe, and since the connection is made outside the processing tank container 20, it can be easily performed. In addition, the outlet 82A of the pre-treatment tank and the inlet 81B of the post-treatment tank in this embodiment are provided with through holes (openings) formed in the peripheral side walls 20A and 20B of the processing tank, and a connection port communicating with the openings. , each pipe fitting is attached to the connection port. Furthermore, by making the connecting tube 83a transparent, the flow state and draining state of the water to be treated can be appropriately confirmed.

According to the oil-water separator according to the present invention, the treatment tank container 20 can be formed into a rational form that can be divided into two or more parts, which facilitates disassembly and assembly work during maintenance. It has the particularly advantageous effect of being able to That is, the water to be treated that has been supplied into the treatment tank container 20 is removed, and maintenance (maintenance and maintenance) such as replacement of the treatment tank container 20 (pre-treatment tank (A) and/or post-treatment tank (B)) is performed. In this case, it is possible to prevent the water to be treated from leaking by dividing the two treatment tanks into two, and the work to connect the flow path of the water to be treated during assembly work (installation work) on site can be done by using pipe joints. This process is carried out outside the processing tank container 20 by connecting it to a pipe, etc., and can be carried out extremely easily, and the workability thereof can be significantly improved. As a specific work, for example, during maintenance, the connecting tube 83a is attached and detached from the pipe fittings of the outlet 82A of the pre-treatment tank and the inlet 81B of the post-treatment tank. By using so-called plugs, the pre-treatment tank (A) and the post-treatment tank (B) are made airtight, thereby making it possible to prevent water to be treated from leaking. Further, by employing a pipe joint having a shutoff valve mechanism, it is possible to simultaneously make the pre-treatment tank (A) and the post-treatment tank (B) airtight while attaching and detaching the connecting tube 83a.
In addition, by installing the post-treatment tank (B) on top of the pre-treatment tank (A), it is possible to save space, and unlike when installed in parallel, there is no piping to route. Water can be drained without waste when draining water during maintenance.
Furthermore, by configuring the empty space 42 on the upstream side, the empty space 43 on the downstream side, the outlet 82A of the pre-treatment tank, and the inlet 81B of the post-treatment tank, the water to be treated (drain water) is transferred to the pre-treatment tank (A). The configuration is such that only drain water (liquid) is passed upward from the bottom of the space 42 to separate oil and water, but even if a minute gas part were to enter, the gas would accumulate so that a gas phase would form at the top of the empty space 42. , no gaseous part enters the post-treatment tank (B). According to this, it can be used as one means for preventing gas from entering in contact with the adsorbent, and it is possible to prevent a phenomenon in which gas blocks the fine pores of the adsorbent, thereby inhibiting the adsorption effect.
Furthermore, if the gas phase cannot be stored in the upper part of the empty space 42 and is about to enter the post-treatment tank (B) via the connecting tube 83a, the air bubbles can be visually observed through the connecting tube 83a and maintenance measures can be taken. .

In addition, since it is divided into two parts, the pre-treatment tank (A) and the post-treatment tank (B), the weight of each is substantially half compared to the state in which they are integrated as the treatment tank container 20. The weight can be reduced to allow maintenance work to be carried out by just one worker. For example, in maintenance work for the pre-treatment tank (A) and the post-treatment tank (B), if the introduction of compressed air to the gas-liquid separation chamber 70 is stopped and the air is opened to the atmosphere, the pre-treatment tank (A) and the post-treatment tank ( The water to be treated in B) falls into the gas-liquid separation chamber 70 and is stored in the gas-liquid separation chamber 70. According to this, approximately half of the water to be treated from the pre-treatment tank (A) and the post-treatment tank (B), excluding the water to be treated that remains contained in the adsorbent, is transferred to the communication tubular portion 83 and The water falls into the gas-liquid separation chamber 70 via the communication tubular portion 80 for supplying the water to be treated, and the weight of the pre-treatment tank (A) and the post-treatment tank (B) becomes lighter. Specifically, for example, if the size of the processing tank container 20 is set to 30 cm in diameter and 120 cm in height, the pre-processing tank (A) and the post-processing tank (B) have different heights. 60 cm, and the weight of each of the pre-treatment tank (A) and post-treatment tank (B), including the weight of the remaining water to be treated, is approximately 30 kg, so even one worker cannot disassemble and transport the work. The weight is such that it is possible to do this properly. Note that 20c is a gripping portion (see FIGS. 4 and 7), which can be gripped when performing work.

Further, in this embodiment, as shown in FIG. 4, there is a drain water retention space 73a which is a lower end side part of the gas-liquid separation chamber 70 and where drain water, which is the water to be treated, accumulates, and the drain water retention space 73a. An outlet 73 of the chamber is provided on the peripheral side wall 71 of the chamber so as to communicate with the outside, and a space not filled with the adsorbent is provided at the bottom of the pretreatment tank (A) whose lower end is closed. The empty space 41 of the water introduction part to be treated, the inlet 81A of the pretreatment tank provided on the peripheral side wall 20A of the pretreatment tank so as to communicate with the empty space 41 of the water introduction part to be treated from the outside, and the drain water A communication tubular part 80 for supplying water to be treated connects and communicates the outlet 73 of the chamber and the inlet 81A of the pretreatment tank so as to communicate the retention space 73a and the empty space 41 of the water introduction part. Be prepared.

This also makes it possible to prevent the water to be treated from flowing out when removing the treatment tank container 20 from the gas-liquid separation chamber 70 when performing maintenance such as replacing the treatment tank container 20, and also to prevent the on-site assembly work. (In the installation work), the work of communicating the flow path of the water to be treated can be performed extremely easily, for example, by connecting a pipe joint and a pipe, and the workability thereof can be significantly improved. As a specific work, for example, during maintenance, the connecting tube 80a is attached and detached from the pipe fittings of the chamber outlet 73 and the pretreatment tank inlet 81A, but a plug with the same outer diameter as the connecting tube 80a is attached to each pipe fitting. By doing so, the gas-liquid separation chamber 70 and the pretreatment tank (A) are brought into an airtight state, thereby making it possible to prevent leakage of the water to be treated. Further, by employing a pipe joint having a shutoff valve mechanism, it is possible to simultaneously make the gas-liquid separation chamber 70 and the pretreatment tank (A) airtight while attaching and detaching the connecting tube 80a.

In addition, in this embodiment, as shown in FIGS. 1 and 4, a sealing flange portion 21B at the lower end of the post-treatment tank is attached to the upper end surface constituted by the upper end closing portion 27A of the pre-treatment tank (A). Since the lower end surfaces constituted by the lower end closing portion 25B of the post-treatment tank are placed in direct contact with each other, stable installation is possible. The pre-treatment tank (A) and the post-treatment tank (B) are connected by two front and rear tank connecting portions 35 (at opposite positions with an angle of 180 degrees). According to this, the number of front and rear tank connecting parts 35 can be minimized, and installation work becomes easy. Note that the present invention is not limited to this, and it goes without saying that the number of front and rear tank connecting portions 35 may be provided at three or more locations.

As a specific example of the structure of the front and rear tank connection parts 35 according to this embodiment, as shown in FIG. A connecting hole 29A at the upper end of the pre-treatment tank is provided in the bracket part 28A at the upper end of the pre-treatment tank, which is provided in a shape that extends outward. A connecting hole 26 (connecting hole 26B at the lower end of the after-treatment tank) is provided at the opposite position of the after-treatment tank (B) to the pre-treatment tank (A) using a fastening member consisting of a bolt, nut, and washer. It is designed to be connected to. Therefore, unlike when disassembling the sealing flange parts 21A and 21B themselves to refill the adsorbent, the user can easily connect or connect the pre-treatment tank (A) and the post-treatment tank (B). It has a structure that can be disassembled.

In addition, in this embodiment, the outlet 82 of the treatment tank (exit 82B of the aftertreatment tank), which is the outlet of the treated water, is provided as a space in the upper part of the aftertreatment tank (B) where the adsorbent is not filled. It is provided at the upper end of the circumferential wall 20B of the post-treatment tank so as to connect and communicate with the empty space 44 at the treated water outlet to the outside. According to this, as described above, the outlet 82 of the processing tank (the post-processing tank The outlet 82B) can be suitably arranged. In this embodiment, a connecting hole 29B at the upper end of the aftertreatment tank is connected to a bracket portion 28B at the upper end of the aftertreatment tank, which is provided in two places on the upper end of the circumferential wall of the aftertreatment tank (B) in a shape that projects outward. The processing tanks are provided in such a manner that processing tanks can be connected in multiple stages.

Next, embodiments of the oil-water separator related to the present invention will be described in detail based on the accompanying drawings (FIGS. 7, 8, etc.). In addition, in this example, a compressible adsorbent that adsorbs oil is installed in the cylindrical treatment tank container so that the water to be treated is purified by adsorbing the oil contained in the water. It is an oil-water separator that is at least partially filled.
7 and 8 are perspective views when the lower ends of the processing tank containers 20 (20A, 20B) are placed upward and the upper ends are placed downward, and the vertical relationship in FIGS. 1 to 6 is reversed. The diagram shows how it looks.

According to the oil-water separator according to the present invention, the holding plate is a member that presses down the adsorbent so that it is compressed and held in the processing tank container, and has rigidity and liquid permeability. . The holding plate of this embodiment is made of a metal plate material such as stainless steel, and is provided with a large number of through holes dispersed on the plate surface (perforated plate) to provide liquid permeability. There is. Note that the presser plate according to the present invention is not limited to this, and may be formed of a resin material as long as it has sufficient oil resistance, rigidity, strength, etc., or may be formed of a hybrid material. It goes without saying that the shape is not limited to a simple flat plate shape, but may also have a shape that enhances rigidity, such as by providing a ring-shaped reinforcing structure.

According to the oil-water separator according to the present invention, the circumferential side wall forming the processing tank container 20 is fixed so that the presser plate 45 is held at a required position against the repulsive force of the compressed adsorbent. It is provided with insertion ports 46 provided in the form of through holes at at least three locations, and insertion holding members 47 that are inserted into the processing tank container 20 at each of the insertion ports 46 and hold the presser plate 45. That is, the insertion port 46 and the insertion holding member 47 are located on the opposite side in the vertical direction from the adsorbent with the presser plate 45 in between. Therefore, the repulsive force of the adsorbent can be appropriately received by the insertion holding member 47 inserted into the insertion opening 46 via the holding plate 45. In addition, as shown in FIG. 8, in the example embodiment, the insertion ports 46 are provided at four locations, but the present invention is not limited to this, and the insertion ports 46 may be provided at five or more locations. Of course, increasing the number has disadvantages in terms of manufacturing cost and workability, but it has the advantage of further improving retention performance.

According to the oil-water separator according to the present invention, an especially advantageous effect is achieved in that the treatment tank container 20 can be filled with an adsorbent that adsorbs oil rationally and easily. That is, in the oil-water separator according to the present invention, since there is no convex portion for restricting movement fixed to the inner surface of the processing tank container as shown in the conventional patent document 1, the adsorbent can be filled smoothly, and the filling of the adsorbent is Process workability can be improved. Furthermore, during maintenance to replace the adsorbent, it is possible to easily take out the used adsorbent and fill it with new adsorbent (refilling work).

Furthermore, according to the oil-water separator according to the present invention, since the inner surface of the processing tank container 20 has no protrusions and has a smooth inner circumferential surface as described above, the adsorbent is compressed through the holding plate 45. In the filling operation, the structure allows easy use of a mechanical device such as an air cylinder device to push the presser plate 45. That is, there is an advantage that the work of packing the adsorbent into a compressed state can be easily mechanized.

Furthermore, in this embodiment, at least a portion of the adsorbent is an oil adsorbent made of fibers. Fiber-based oil adsorbents are, for example, non-woven or cotton-like oil adsorbents made of synthetic resin fibers as described below, and are compressible and generate a repulsive force when compressed. . The repulsive force of this fiber-based oil adsorbent decreases with use, so it is necessary to press a sufficient amount strongly enough at the manufacturing stage, and as mentioned above, mechanization using an air cylinder device etc. is required. It is recommended to perform the filling operation by

Further, in this embodiment, the processing tank container 20 is provided in a cylindrical shape, and the holding plate 45 is provided in a substantially circular shape so as to be concentrically fitted inside the processing tank container 20. That is, in this embodiment, the peripheral side wall of the processing tank container 20 is a cylinder, and the circular pressing plate 45 is arranged as a surface perpendicular to the axis of the cylinder, and the outer periphery of the disc is the same as that of the processing tank container. It is configured to be fitted into the inner periphery of a cylinder No. 20 with a small clearance. According to this, the symmetry of the oil-water separator equipped with the processing tank container 20 in which the adsorbent is pressed by the holding plate 45 is increased, the structural strength as a pressure vessel can be easily obtained, and the manufacturing process becomes easier. It can be made into a form that is easy to use.

In addition, in this embodiment, as shown in FIGS. 7 and 8, the insertion port 46 is connected to the peripheral side wall (periphery of the pretreatment tank) so as to provide an empty space in the processing tank container 20 that is not filled with the adsorbent. They are provided at circumferential positions that are substantially parallel to each other and spaced apart from each other by a required distance from the end edge of the cylindrical body on the side wall 20A or the circumferential side wall 20B of the post-processing tank. According to this, the presser plate 45 can be held more evenly and reliably without tilting or coming off, and the structural reliability can be further improved.

In addition, in this embodiment, the processing tank container 20 is divided into at least two vertically into a pre-processing tank (A) and a post-processing tank (B). In the processing tank (B), a presser plate 45 is arranged to maintain the filled state of the adsorbent. As shown in FIG. 4, a presser plate is attached to the lower end of the pretreatment tank (A) so that an empty space 41 of the water introduction part, which is an empty space at the lower end of the pretreatment tank (A), is provided. 45 and its holding plate 45, the lower end closing part 25A is arranged at the lower end of the after-treatment tank (B) so that a downstream empty space 43, which is an empty space at the lower end of the after-treatment tank (B), is provided. A presser plate 45 and a lower closing portion 25B are arranged below the presser plate 45.

Further, in this embodiment, the insertion holding member 47 is a bolt, and a nut 48 into which the bolt is screwed is fixed to the insertion opening 46. As a more specific example, the nut 48 is fixed in a liquid-tight seal state by welding or the like to the insertion port 46 provided on the circumferential side wall (the circumferential side wall 20A of the pre-treatment tank or the circumferential side wall 20B of the post-treatment tank), As the bolt (insert holding member 47), a seal bolt that can be liquid-tightly sealed with the nut 48 by packing can be used. According to this, the functions of the insertion port 46 and the insertion holding member 47 can be provided with a simple configuration. Note that the insertion holding member 47 of the present invention is not limited to the bolt as described above, but may be of other forms that can be inserted from the outside, such as a pin-shaped material that can be sealed with an O-ring or the like. Of course you can use things.

In addition, in this embodiment, as shown in FIG. 4, there is an upstream empty space 42 as an empty space at the upper end of the pre-treatment tank (A), and an empty space 42 at the upper end of the post-treatment tank (B). The empty space 44 at the outlet of the treated water is formed by the upper lid of the container, which is formed by the upper end closing portion 27A of the pre-treatment tank and the upper end closing portion 27B of the post-treatment tank, and a presser plate 45 disposed at the upper part of the container. and the presser plate 45 is interposed between the upper lid of the container and the presser plate 45 to prevent displacement (movement) of the presser plate 45 so that an empty space can be provided at a required distance from the inner surface of the upper lid of the container. (Restriction) by a fixing metal fitting 49 arranged as a spacer. The fixing fitting 49 of this embodiment is fixed and integrated inside the lid of the container (the upper end closing part 27A of the pre-treatment tank and the upper end closing part 27B of the post-treatment tank), and is used for filling the adsorbent. It is arranged so that it will not be displaced.

Next, a specific process example of the adsorbent filling operation according to the present invention will be described.
As shown in FIG. 8, etc., the sealing flange portion 21 (see FIG. 6) is placed with the lower end flange 24 facing upward and the opening opened upward. In order to secure an empty space 44 at the outlet of the treated water, a presser plate 45 is inserted so that it can be received by the fixture 49 (see FIG. 4). Next, an adsorbent (containing a compressible adsorbent as at least a part of the adsorbent layer) is put into the adsorbent filling part (F) of the processing tank container 20, and the adsorbent is transferred to the air cylinder device (see Fig. The adsorbent filling part (F) is filled by pushing the adsorbent material through the holding plate 45 (not shown), and the position of the upper surface of the holding plate 45 (the position of the surface located on the upper side in the filling process shown in FIG. 8) is the insertion opening. Press down until it is displaced (moved) slightly below 46. Then, with the adsorbent held down together with the holding plate 45, the seal bolt, which is the insertion holding member 47, is screwed into the nut 48 of the insertion port 46, so that its tip end abuts against the upper surface of the holding plate 45. so that it can be held. In this embodiment, insert holding members 47 (seal bolts) are similarly fixed to the four insertion ports 46. Thereafter, the pressing force of the air cylinder device is released, and the presser plate 45 is inserted and held in contact with the holding member 47 by the repulsive force of the compressible adsorbent.

In this embodiment, the presser plate 45 is held and fixed as described above, and in the sealing flange portion 21 having the configuration shown in FIG. By fixing 25, empty spaces (empty space 41 at the water introduction section and empty space 43 on the downstream side) can be appropriately provided, and the pretreatment tank can also be used independently as one treatment tank. A tank (A) and a post-treatment tank (B) can be formed.
According to the above steps, both the pre-treatment tank (A) and the post-treatment tank (B) of this embodiment can be manufactured rationally and easily.

Next, an example of the internal structure of the adsorbent of an oil-water separator related to the present invention, which was previously filed by the applicant in Japanese Patent Application No. 2022-72029, is shown in the attached drawing (FIG. 9). This will be explained in detail based on the following. In addition, in the embodiment shown in FIG. 9, the water to be treated is placed in one treatment tank container 20 so that the water to be treated containing emulsified oil is adsorbed and removed to purify the water to be treated. The oil-water separator is equipped with a plurality of passage layers for treated water to pass through.

In the oil-water separator according to the present invention, as shown in FIG. 9, in the order through which the water to be treated passes, there is a demulsifying material layer 31 and a layer disposed downstream of the demulsifying material layer 31. An oil adsorption layer 30 made of fibers is provided with an oil adsorption fibrous material layer 32 that adsorbs oil by a layer in which fibrous materials are assembled. A zeta potential adsorbent layer 60, which is a layer disposed downstream of the activated carbon layer 50 and adsorbs and removes emulsified oil using zeta potential, is provided. In this embodiment, the oil-water separator is connected to piping so that the water to be treated passes from the bottom (upstream side) to the top (downstream side) of the treatment tank container 20. Here, "upper" and "lower" mean upper and lower in relation to the direction in which gravity acts (vertical direction). Furthermore, here, the "upstream side" through which the water to be treated is passed refers to the position relatively on the previous stage in the part where oil is adsorbed, and the "downstream side" through which the water to be treated is passed. '' indicates a relatively later position in the area where oil is adsorbed.

In addition, in the oil/water separator according to the present invention, as a guideline for the appropriate composition ratio (filling volume ratio) of each adsorbent, for example, the oil adsorption fiber layer is 70 to 90%, the activated carbon layer is 5 to 15%, The zeta potential adsorbent layer can be 5-15%. According to this, it is possible to adjust as much as possible so that the three adsorption layers can adsorb oil in a well-balanced manner and reach the end of their lifespan at the same time, thereby maximizing the lifespan of the oil-water separator.
Moreover, in the oil-water separator according to the present invention, the liquid to be treated leaks along the inner circumferential surface of the treatment tank container 20 and easily passes therethrough. For this reason, the emulsification breaking material layer 31 and the oil adsorption fiber material layer 32 of the oil adsorption layer 30 made of fibers are required to be filled with a predetermined density, which is also required in the prior art. That is, by increasing the density of the emulsification-breaking material layer 31 and oil-absorbing fiber material layer 32, the periphery (outer periphery) of the emulsification-breaking material layer 31 and oil-absorbing fiber material layer 32 is strongly pushed toward the inner peripheral surface of the processing tank container 20. Since pressure can be applied, it is possible to suppress the phenomenon in which the liquid to be treated passes through in a leaked state as described above.

An amine-based demulsification material can be used as the demulsification material layer 31 that constitutes a part of the oil adsorption layer 30 made of fibers on the upstream side in the order through which the water to be treated passes through. This amine-based emulsifying agent is, for example, provided in the form of a sheet of fibrous material, and is charged with a positive charge (positive charge) in the sheet-like treated water passage layer that has liquid permeability such as water permeability. An amine-based positively charged material supported thereon can be used. According to such a positively charged emulsification-breaking material layer 31, colloidal fine oil particles that are negatively charged (negatively charged) by being emulsified are attracted and aggregated to form agglomerated oil. Can destroy emulsification. Thereby, the aggregated oil, which is larger in size than colloidal oil particles, can be adsorbed and removed with high efficiency in the oil-absorbing fiber material layer 32, which is the downstream layer.

The oil-absorbing fiber material layer 32 that constitutes a part of the downstream side of the fiber-based oil-absorbing layer 30 in the order in which the water to be treated passes through is commonly used as an oil-absorbing material for oil fences and the like. There are two types of materials: those made from chemical fibers such as polypropylene and those made from natural fibers whose main component is cellulose, but chemical fibers are preferable because they allow oil to penetrate evenly.

The oil-absorbing fiber material layer 32 may be in the form of, for example, cotton, a sheet, or a chip formed by cutting the sheet into strips. Note that the sheet-like oil-absorbing fibrous material layer 32 refers to a non-woven sheet formed by binding fiber materials (a non-woven sheet) and a non-woven sheet. Fiber materials are assembled to a desired thickness, including woven fabrics, such as those in which fibers are arranged on both sides and cotton-like fibers are sandwiched between the two surfaces to a desired thickness. This includes all things that are structured in a layered form that spreads out in a planar shape. By the way, when it comes to chips that are cut into chips, the cross-sectional area and shape (for example, the size of the strip shape) can be changed to suit the required suction specifications. Adsorption efficiency can be changed and adjusted.

The activated carbon layer 50 of this embodiment is, for example, one in which granular activated carbon is deposited in a layered manner to form a layer of a required thickness, or one in which granular activated carbon is formed in the form of fibers. Any material may be used as long as it is formed in a layered manner so as to have liquid permeability, such as one formed to a required thickness. Note that, as for the oil adsorption action including the adsorption capacity according to this embodiment, rod-shaped coal-based activated carbon tends to have higher performance than other activated carbons such as vegetable-based activated carbon.

The zeta potential adsorbent layer 60 of this embodiment is one in which a positively charged aggregate of fine materials is deposited in a layered manner. ), whose fibers have been given a positive charge through special processing, and which uses the zeta potential to powerfully charge negatively charged substances (in the present invention, colloidal oil particles) in water. A material that is adsorbed to can be used.

In the oil/water separator of this embodiment, the water treatment adsorbent (charge adsorption fiber) described in Patent Document 3 can be used as an example of the zeta potential adsorbent layer 60. The zeta potential adsorbent constituting the zeta potential adsorbent layer 60 is a fibrous material (substrate such as cellulose) with a fiber diameter on the order of 30 to 50 μm and a zeta potential material supported thereon.
Further, as another zeta potential adsorbent constituting the zeta potential adsorbent layer 60 according to the present invention, one in which fine particles of perlite or diatomaceous earth are supported on a cellulose base material via a resin can be used. can.

The characteristics of the adsorbent constituting the plurality of treated water passage layers explained above will be briefly explained below.
The oil-absorbing fiber material (chemical fiber) constituting the oil-absorbing fiber material layer 32 can adsorb floating oil and flocculated oil, and evenly penetrates the oil, but it is difficult to exhibit its performance initially against emulsified oil. . In addition, the oil-absorbing fiber material (natural fiber) constituting the oil-absorbing fiber material layer 32 can adsorb floating oil and flocculated oil, but it is difficult to exhibit its performance initially for emulsified oil, and oil penetration is uneven. There is. In addition, the activated carbon constituting the activated carbon layer 50 has the highest adsorption amount for emulsified oil and can also remove COD (organic substances), but can hardly adsorb floating oil and flocculated oil. The zeta potential adsorbent constituting the zeta potential adsorbent layer 60 can exhibit high performance even for emulsified oil from the beginning and can also remove bacteria, but it is hardly able to adsorb floating oil or flocculated oil.

Furthermore, since activated carbon and zeta potential adsorbent can hardly adsorb floating oil or flocculated oil, it is effective to arrange an oil adsorption fiber material in front of activated carbon or zeta potential adsorbent. The demulsifying material and the oil-absorbing fiber material may be alternately arranged as appropriate. Furthermore, since activated carbon and zeta potential adsorbent can adsorb a smaller amount of aggregated oil than oil adsorbent, it is advisable to use a sufficient amount of oil adsorbing fiber material. Note that activated carbon and zeta potential adsorbent may be used in only the amounts necessary to prevent clouding at the initial stage and to maintain a low oil concentration thereafter.

According to the oil-water separator according to the present invention, the oil separation performance is significantly improved from the initial performance, and the particularly advantageous effect is that the water to be treated can be purified to a high degree. For example, drain water generated from compressed air and containing a low concentration of oil can be purified very appropriately. That is, it exhibits high performance (for example, oil concentration of 1 mg/L or less) from the beginning, eliminates the need for priming, and can treat various types of drain from coagulated oil to emulsified oil. In addition, by placing activated carbon, it is possible to reduce the chemical oxygen demand (COD) (organic substances), and by placing zeta potential adsorbent, it is possible to reduce bacteria and reduce slime generation in treated water. It can be suppressed. Although the zeta potential adsorbent is more expensive than other oil adsorbents, the required amount is limited, so the cost does not increase significantly.

In addition, in the oil-water separator of this embodiment, as shown by the arrow in FIG. The treated water passing layer includes a fiber oil adsorption layer 30 (a treated water passing layer including an emulsification breaking material layer 31 and an oil adsorption fiber material layer 32), an activated carbon layer 50, and a zeta potential adsorption layer. It is provided so as to include a material layer 60. That is, in this embodiment, as shown in FIG. 9, each layer of the water passing layer to be treated is arranged in one treatment tank container 20, and the water to be treated permeates into each oil adsorption layer from below. It is formed so that the oil is separated and purified by adsorption. By forming in this manner, it is possible to easily configure one oil-water separator using one processing tank container 20, and it is possible to centrally perform piping connections and maintenance management. In addition, oil is lighter than water and tends to float, and coagulated oil tends to spread horizontally. Therefore, each treated water passage layer in the form of a stack of horizontally placed layers as in this embodiment allows oil to be removed. It has the advantage of being able to adsorb uniformly and efficiently.

Further, in the oil/water separator of this embodiment, as shown in FIG. 9, a plurality of oil adsorption layers 30 made of fibers are provided. In this embodiment, the oil adsorption layer 30 made of two layers of fibers is arranged. Further, according to this embodiment, the processing tank container 20 has a shape in which cylindrical tanks are vertically stacked in two stages, and the lower tank is the (A) pre-treatment tank. The upper tank is the post-treatment tank (B). In this embodiment, each container (A) pre-treatment tank and (B) post-treatment tank (two containers) is provided with a flange 24 at the upper and lower ends, and the packing is attached to the overlapping flanges 24, 24. They are connected by a fastening member 22 via 23 in a watertight seal state. Although the fastening member 22 of this embodiment is composed of a bolt, a nut, and a washer, it is not limited thereto, and other known fastening means may be used.

By configuring one processing tank container 20 as a two-stage cylindrical tank in this way, it can be made into a form that is easy to manufacture. As a specific example, the processing tank container 20 of this embodiment has a diameter of about 30 cm and a height of about 100 cm, and is divided into two parts in the height direction during manufacturing. For this reason, each layer of the treated water passage layer can be easily arranged in each cylindrical tank, making it easy to manufacture.

In the pretreatment tank (A) of this embodiment, as shown in FIG. ), (3) oil adsorbent (forms the chip-shaped oil-absorbing fiber material layer 32), (4) destructive material (forms the emulsification-breaking material layer), (3) oil-adsorbent outflow prevention (described later). (may be the same as the oil absorbent material (15)) and (5) a holding plate (sheet metal) are arranged.

In the (B) post-treatment tank of this embodiment, as shown in FIG. (8) Oil adsorbent outflow prevention (which may be the same as the oil adsorbent (15) described later), (8) Oil adsorbent (constituting the chip-shaped oil adsorbing fiber material layer 32), (9) Oil adsorbent (constituting a sheet-shaped oil-absorbing fibrous material layer) and prevention of mixing of different adsorbents, (10) Activated carbon (constituting the activated carbon layer 50), (11) Oil-absorbing material (sheet-shaped oil adsorbing material) 12) Zeta potential adsorbent (constituting the zeta potential adsorbent layer 60), (13) Oil adsorbent (constituting the sheet-like oil adsorbing fibrous material layer) - Preventing mixing of different adsorbents, (14) Oil adsorbent (constituting a chip-shaped oil-absorbing fibrous material layer) - (12) Preventing the outflow of zeta potential adsorbent, (15) Oil-adsorbing material (forming a sheet-shaped oil adsorbing material layer) (14) Preventing the oil adsorbent from flowing out; (16) A holding plate (sheet metal) is arranged. Further, an empty space 40 is provided between the (A) pre-treatment tank and (B) post-treatment tank, that is, between both (5) and (6) holding plates.

Note that as the presser plate (sheet metal) in this embodiment, a circular flat metal perforated plate in which a large number of holes are formed so as to have liquid permeability is used, but the present invention is not limited to this. The material is not limited to any particular type, and may be made of resin as long as it has rigidity so that the adsorbent can be properly held in the processing tank container 20 and satisfies other specifications such as oil resistance. Of course. Further, the emulsification-destroying material layer 31 and the sheet-like oil-absorbing fiber material layer may be composed of a single-layer sheet, but of course they may also be composed of a plurality of sheets stacked one on top of the other. . Further, the chip-shaped oil-absorbing fiber material layer 32 of this embodiment is configured such that sheet-shaped oil-absorbing fiber materials cut into strips are randomly packed into the processing tank container 20. However, the present invention is not limited thereto, and may be configured in the form of a cotton-like structure packed with an aggregate of fibers having an oil adsorption effect. Furthermore, the periphery (outer periphery) of the laminated (6) presser plate and each adsorbent layer, etc., and the inner peripheral surface of the processing tank container 20 are fixed and bonded by sealing means such as silicone adhesive. Therefore, it is possible to suppress and prevent the adsorption efficiency from decreasing due to leakage of the water to be treated.

Further, regarding the charge adsorption fibers (zeta potential adsorption material) constituting the zeta potential adsorption material layer 60 of this embodiment, the oil adsorption material (14) constituted by the sheet-like oil adsorption fiber material layer of this embodiment, etc. Alternatively, the zeta potential adsorbent may be placed in a non-woven bag to prevent the zeta potential adsorbent from flowing out.

Further, in this embodiment, the processing tank container 20 is configured by stacking cylindrical tank containers in two stages, but is not limited to this, and may be stacked in three or more stages. On the other hand, all of the treated water passing layers may be arranged in one tank container.Furthermore, the tank container may be divided into multiple parts and connected by piping, and each treated water passing layer may be arranged in the above-mentioned order. It is also possible to place it in Furthermore, in the present invention, at least three components are arranged in the order from the upstream side through which the water to be treated passes to the downstream side: the oil adsorption layer 30 made of fibers, the activated carbon layer 50, and the zeta potential adsorption material layer 60. It is sufficient that there is a positional relationship between the three components, and this does not preclude the addition of other layered components such as other adsorbent layers or other empty spaces between or before and after the three components. .

Furthermore, in the oil-water separator of this embodiment, as shown in FIG. 9, an empty space 40, which is a space in which no adsorbent exists, is provided between the oil adsorption layer 30 made of multiple stages of fibers. In this way, when a space (empty space 40) in which no adsorbent exists is provided, the empty space 40 is filled only with the water to be treated, and the uneven penetration is temporarily eliminated. According to this, the water to be treated can be purified more uniformly. In this embodiment, the empty space 40 is provided only at the joint between the processing tank container 20 (A) and the processing tank container 20 (B). According to this, the respective adsorbents constituting each adsorption layer can be efficiently filled in the limited space of each treatment tank container 20 (A), (B), and the adsorbents can be packed densely in the joint portion. By conversely utilizing a portion that is difficult to shape into a constituent part of the empty space 40, the empty space 40 can be provided rationally and easily.

According to the embodiment shown in FIG. 9 (this embodiment example) described above, regarding the adsorption and removal of oil from the water to be treated containing emulsified oil, the same method is achieved except that the zeta potential adsorbent layer 60 is not provided. Compared to the configuration and conditions, the initial performance (oil purification efficiency) could be improved about 10 times. Further, according to this embodiment, sufficiently high performance could be obtained regarding the adsorption and removal of oil from the water to be treated containing emulsified oil, and also regarding the total amount of water to be treated.

In addition, when the arrangement of the activated carbon layer 50 and the zeta potential adsorbent layer 60 is reversed (the zeta potential adsorbent layer 60 is arranged on the upstream side of the flow of the water to be treated with respect to the activated carbon layer 50, (under the same conditions), this embodiment was able to treat approximately 15% more total amount of water to be treated. According to this, the property of activated carbon, which has a larger adsorption capacity than the zeta potential adsorbent constituting the zeta potential adsorbent layer 60, can be appropriately utilized, and there is an advantage that the life of the oil/water separator can be extended. .

Although the present invention has been variously explained above using preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is about.

(A) Pre-treatment tank (B) Post-treatment tank (F) Adsorbent filling section (1) Holding plate (sheet metal)
(2) Destruction material (constituting the emulsification destruction material layer 31)
(3) Oil-absorbing material (constituting the chip-shaped oil-absorbing fiber material layer 32)
(4) Destruction material (constituting the emulsification destruction material layer)
(5) Holding plate (sheet metal)
(6) Holding plate (sheet metal)
(7) Destructive material (constituting the emulsified destructive material layer 31)
(8) Oil-absorbing material (constituting the chip-shaped oil-absorbing fiber material layer 32)
(9) Oil-absorbing material (constitutes a sheet-like oil-absorbing fiber layer)
(10) Activated carbon (constituting activated carbon layer 50)
(11) Oil-absorbing material (constitutes a sheet-like oil-absorbing fiber layer)
(12) Zeta potential adsorbent (constituting the zeta potential adsorbent layer 60)
(13) Oil-absorbing material (constitutes a sheet-like oil-absorbing fiber material layer)
(14) Oil-absorbing material (constituting a layer of chip-shaped oil-absorbing fiber material)
(15) Oil-absorbing material (constituting a sheet-like oil-absorbing fiber material layer)
(16) Holding plate (sheet metal)
20 Processing tank container 20A Circumferential side wall of pre-treatment tank 20B Circumferential side wall of post-treatment tank 20c Gripping part 21 Seal flange part 21A Seal flange part at the lower end of the pre-treatment tank 21B Seal flange part at the lower end of the post-treatment tank 22 Fastening member 23 Packing 23A Pre-treatment tank packing 23B Post-treatment tank packing 24 Lower end flange (flange)
24A Lower end flange of pre-treatment tank 24B Lower end flange of after-treatment tank 25 Lower end closing part 25A Lower end closing part of pre-treatment tank 25B Lower end closing part of after-treatment tank 26 Connection hole 26A Connection hole at lower end of pre-treatment tank 26B Lower end of after-treatment tank 27 Upper end closing part 27A Upper end closing part of the pre-treatment tank 27B Upper end closing part of the after-treatment tank 28 Bracket part 28A Bracket part at the upper end of the pre-treatment tank 28B Bracket part at the upper end of the after-treatment tank 29 Connection hole 29A Upper end of the pre-treatment tank Connection hole 29B Connection hole at the upper end of the after-treatment tank 30 Oil adsorption layer made of fibers 31 Emulsification breaking material layer 32 Oil adsorption fiber layer 35 Front and rear tank connection parts 40 Empty space 41 Empty space at the water introduction part to be treated 42 Upstream side Empty space 43 Empty space on the downstream side 44 Empty space at the outlet of treated water 45 Holding plate 46 Insertion port 47 Insertion holding material 48 Nut 49 Fixing fittings 50 Activated carbon layer 60 Zeta potential adsorption material layer 70 Gas-liquid separation chamber 71 Peripheral wall of chamber 72 Chamber inlet 72a Gas phase part 73 Chamber outlet 73a Drain water retention space (liquid phase part)
74 Bracket part at the lower end of the chamber 74a Chamber fixing hole 74b Fixing means 75 Fixing part for installation 76 Bracket part at the upper end of the chamber 76a Chamber connecting hole 77 Connecting part for installation 78 Upper end closing part of the chamber 79 Lower end closing part of the chamber 80 Water supply to be treated 80a Connecting tube 81 Inlet of treatment tank 81A Inlet of pre-treatment tank 81B Inlet of post-treatment tank 82 Outlet of treatment tank 82A Outlet of pre-treatment tank 82B Outlet of post-treatment tank 83 Communicating tubular part 83a Connecting tube 90 Cover part 91 Upper plate 91a Through hole 92 Back plate 93 Side plate 95 Hanging part 100 Base part 101 Fork pawl insertion hole 200 Operation part

Claims (7)

An oil-water separator in which a treatment tank container is filled with an adsorbent that adsorbs oil so as to purify the water to be treated by adsorbing oil contained in the water,
The processing tank container is formed into a cylindrical shape so that it can be installed directly on the base part or via an intervening member in a freestanding state with the axis erected in the vertical direction, and a sealing part is provided at the lower end part. Equipped with a flange part,
The sealing flange portion is provided with a lower end closing portion for closing the lower end of the processing tank container, and an installation connecting portion connected to the base portion side,
At the lower end of the treatment tank container, an empty space of the water introduction part to be treated, which is provided as a space not filled with the adsorbent, and an empty space of the water introduction part to be treated are communicated from the outside. An oil/water separator comprising: a treatment tank inlet provided on a cylindrical circumferential wall; The upper end of the treatment tank container is provided with an empty space of the treated water outlet provided as a space not filled with the adsorbent, and an empty space of the treated water outlet that communicates with the outside. and an outlet of the treatment tank,
2. The oil-water separator according to claim 1, wherein a hanging part for hanging is provided at the center of the upper surface of the upper end closing part of the processing tank container. The water to be treated is drain water generated from compressed air,
A gas-liquid separation chamber provided as the intervening member on the base portion is installed so as to form a space in which the compressed air containing the drain water is introduced and gas-liquid separation is performed,
The oil-water separator according to claim 2, wherein the processing tank container is installed above the gas-liquid separation chamber. The processing tank container is divided into at least two vertically divided into a pre-processing tank and a post-processing tank, and the sealing flange portion is provided at the lower end of each of the pre-processing tank and the post-processing tank. The oil-water separator according to claim 3, characterized in that: The oil/water separator according to any one of claims 1 to 4, wherein an operating section is installed in a free-standing state on the base section. The oil-water separator according to any one of claims 1 to 4, wherein a plurality of the processing tank containers are installed in a self-supporting state on the base portion. The oil/water separator according to any one of claims 1 to 4, wherein an operating section and a plurality of the processing tank containers are installed in an independent state on the base section.

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