WO2005087341A1

WO2005087341A1 - Oil/water separator

Info

Publication number: WO2005087341A1
Application number: PCT/JP2005/003982
Authority: WO
Inventors: Hidetoshi Terada; Iwao Sawada; Masahiro Adachi; Kaoru Hashimoto; Tomiyasu Sakurai; Kiyoshi Miyaji; Masaki Nakashima
Original assignee: Sasakura Engineering Co., Ltd.
Priority date: 2004-03-10
Filing date: 2005-03-08
Publication date: 2005-09-22
Also published as: JP4577773B2; TWI263528B; KR20060119709A; KR101138263B1; JP2005288435A; TW200536596A

Abstract

When the oil component in water to be treated is passed for separation through two stages, a coarse-graining element (9) in a front stage separation chamber (4) and a coarse-graining element (16) in a rear stage separation chamber (5), occurrence of clogging in the coarse-graining element (16) in the rear stage separation chamber (5) is avoided to improve the rate of separation of oil component. The water to be treated moving from the front stage separation chamber (4) to the rear stage separation chamber (5) is filtered by a filter element in a filter (20), whereby the solid particle component contained in the water to be treated is separated.

Description

Oil-water separator

Technical field

[0001] The present invention provides an oil-water separator for separating water to be treated into oil and water when the water to be treated such as wastewater is mixed with oil, such as bilge water in a ship. It concerns the equipment.

Background art

[0002] In Patent Document 1 as a prior art, water to be treated containing oil is first introduced into a pre-stage separation chamber, where a relatively coarse-grained coarse-grained element (while passing through a perforation hole) is used. (A material that has the function of agglomerating ultra-fine oil droplets into one another) to make the oil droplets coarser and float and then separate the water to be treated from the former separation chamber into the latter. The oil droplets are introduced into the room, where the oil droplets are coarsened and floated and separated by passing through the coarse-grained ridge element, which is finer than the coarse-grained ridge element in the pre-stage separation chamber. It has been proposed to separate at a high separation rate.

Patent document 1: JP-A-8-309102

Disclosure of the invention

Problems to be solved by the invention

[0003] However, in this prior art, by increasing the size of the coarse-graining element in the later-stage separation chamber of each of the separation chambers, the water to be treated can be more efficiently separated. Since the solid particle component is also contained in addition to the oil content, the solid particle component force closes the eyes of the fine-grained coarse-grained sill in the latter stage.

[0004] In other words, in order to improve the separation ratio of the oil component, the fineness of the coarse-grained element in the latter stage is required to be fine. There was a problem that there was a limit in terms of clogging with solid particulate components contained in water o

[0005] In this case, clogging due to solid particle components contained in the water to be treated is the same as before. The power that can be eliminated by separating and removing the solid particle components by filtering the water to be treated in advance with a filter element The pre-filtration of the water to be treated is often included in the water to be treated. If the filter element is rapidly clogged or the filtration resistance is significantly increased, the filtration of the water to be treated is significantly inhibited.

[0006] It is a technical object of the present invention to provide an oil-water separation device that solves these problems.

Means for solving the problem

[0007] To achieve this technical object, claim 1 of the present invention provides

"A first-stage separation chamber including a relatively coarse coarse-grained element, and a second-stage separation chamber including a coarse-grained element that is finer than the coarse-grained element in the first-stage separation chamber. And an oil-water separation device configured to supply the water to be treated to the pre-stage separation chamber 1 and to feed the water to be treated discharged from the pre-stage separation chamber 1 to the post-stage separation chamber 1 at the next V.ぉ

The apparatus is provided with a filter configured to filter the water to be treated from the first-stage separation chamber to the second-stage separation chamber with a filter element to separate solid particle components contained therein. "

It is characterized by that.

[0008] Claim 2 of the present invention

"The inside of the vertical sealed container is partitioned by a partition plate into an upper pre-stage separation chamber and a lower post-stage separation chamber, and relatively coarse coarse particles are contained in the pre-stage separation chamber. A water treatment element supplied from a supply port in the upper part of the pre-stage separation chamber 1 is provided with water to be treated after passing through the coarse-grained water element in the pre-stage separation chamber 1 and discharged therefrom. On the other hand, a coarse-grained shading element finer than the coarse-grained shading element in the first-stage separation chamber 1 is provided in the second-stage separation chamber, and The inflow rocker at the upper part thereof is configured so that the inflowing water to be processed passes through the coarse-graining element in the post-stage separation chamber 1 and then the discharge rocker provided thereunder is also discharged. In addition, The outlet rocker of the separation chamber 1 The water to be treated reaching the inlet of the post-stage separation chamber 1 is filtered by a filter element to separate solid particle components contained therein, and the filter is provided with the closed container. Provided separately. "

It is characterized by that.

The invention's effect

[0009] According to the configuration described in claim 1, the water to be treated containing the oil component and the solid particle component is first supplied to the first-stage separation chamber 1, and the coarse particles contained in the first-stage separation chamber are provided. By passing through the dani element, the oil droplets in the water to be treated agglomerate with each other, coarsen, and float and separate to the upper part in the first separation chamber.

[0010] The water to be treated from which the oil has been separated in the pre-stage separation chamber in this way reaches the pre-separation chamber full-size filter, where it is filtered by the filter element. Solid particles contained in the treated water are separated and removed.

[0011] Next, the water to be treated flows into the second-stage separation chamber 1 from the filter, and is built in the second-stage separation chamber 1 and passes through a fine-grained /! As a result, the fine oil droplets in the water to be treated agglomerate and coarsen with each other, and float and separate at the upper part in the second separation chamber.

[0012] In this case, the water to be treated, which has passed through the fine-grained coarse-graining element in the first-stage separation chamber, has the fine-grained coarse particles separated from the solid particles by the filter in advance. It is possible to reliably suppress the occurrence of clogging of the granulation element due to solid particle components.

[0013] On the other hand, the water to be treated, which is filtered by the filter element in the filter, has a low oil concentration in the pre-stage separation chamber 1 because the oil is removed therefrom. It is possible to reliably reduce clogging of the element due to oil content and increase of filtration resistance due to oil content.

[0014] Incidentally, the filter only separates solid particle components in the water to be treated and does not separate oil components. However, as will be described in detail in the embodiment, according to an experiment, the former separation chamber was used. By providing the filter between the first and the second separation chambers, the overall oil separation rate can be improved as compared with the case where this filter is not provided. It was.

[0015] Further, according to the configuration described in claim 2, the first-stage separation chamber 1 and the second-stage separation chamber can be integrally formed as one vertical sealed container. Compared to the case where the second separation chamber is separately configured, the size and weight can be significantly reduced and the floor area for installation can be reduced.

[0016] In this case, since the filter is separate from the closed container, replacement of the filter element in the filter can be facilitated.

[0017] As described in claim 3, as the filter element in the filter, the same filter element as the coarse-grained element in the post-separation chamber is used, or By using a filter element smaller than the coarse-grained element in the latter-stage separation chamber, the clogging of the coarse-grained element in the latter-stage separation chamber can be more reliably achieved.

[0018] The coarse-grained drier element is made of a so-called hydrophilic material having a strong interaction with water, and a so-called hydrophilic material having a strong interaction with oil. Things exist.

[0019] Therefore, as described in claim 4, the coarse-grained ridge element in the post-separation chamber is made of a hydrophilic material so that the coarse-grained ridge element and the coarse-grained ridge element are mutually separated when passing through the coarse-grained ridge element. The oil droplets that are agglomerated due to agglomeration will quickly separate and float and separate without adhering to the hydrophilic coarse-grained drier element, so that the oil separation rate can be further improved.

[0020] Further, as described in claim 5, by using a hydrophilic material for the filter element in the filter, it is possible to more reliably reduce clogging of the filter element due to oil. .

Brief Description of Drawings

FIG. 1 is a longitudinal sectional front view showing an embodiment.

FIG. 2 is an enlarged vertical sectional front view of a filter used in the embodiment.

Explanation of symbols

[0022] 1 closed container

3 Partition plate 4 Pre-stage separation chamber

5 Rear separation chamber

6 Supply port for treated water

9 coarse and coarse-grained elements

10 Outlet for treated water

14 Inflow of treated water

16 fine, coarse-grained elements

17 Outlet for treated water

12, 13, 18, 19 Oil extraction port

20 Filter

20e filter element

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. FIG.

In FIG. 1, reference numeral 1 denotes a vertical cylindrical closed container that stands upright from the floor 2.

By providing a partition plate 3, the inside of the closed container 1 is partitioned into an upper pre-stage separation chamber 4 and a lower post-stage separation chamber 15.

[0026] A supply port 6 for introducing treated water containing oil and solid particle components into the first-stage separation chamber 14 is provided at an upper portion of the first-stage separation chamber 14; By being provided in a tangential direction when viewed from the axial direction of the sealed container 1, the water to be treated introduced from the supply port 6 enters the pre-stage separation chamber 14 and is positioned around the axis of the sealed container 1. It is configured to turn.

[0027] A metal mesh layer 7 is provided in a part of the pre-stage separation chamber 14 below the supply port 6, and a part below the metal mesh layer 7 has a through hole at the center. A support plate 8 is provided, and a cylindrical coarse grain element 9 is provided on the lower surface of the support plate 8, and the water to be treated flowing down in the pre-separation chamber 4 is filled with the coarse particles. It is configured so that its inner forces also pass outwardly through the chemical element 9! RU

[0028] The coarse-grained drier element 9 in the pre-stage separation chamber 14 has strong interaction with water. V, composed of so-called hydrophilic fibers! RU

Further, the pre-stage separation chamber 14 is provided with an outlet 10 for the water to be treated at the bottom thereof, that is, on the upper side of the partition plate 3. An oil extraction port 12 opening below the ceiling plate 11 and an oil extraction port 13 opening below the support plate 8 are provided.

On the other hand, the water to be treated from the discharge port 10 of the pre-stage separation chamber 14 is supplied to the top of the post-stage separation chamber 15, that is, below the partition plate 3, into the post-stage separation chamber 15. An inlet 14 is provided for introduction.

A support plate 15 having a through-hole at the center is provided in a portion below the inflow port 14 in the post-stage separation chamber 15, and a cylindrical surface is provided on a lower surface of the support plate 15. A coarse-grained shading element 16 having a shape is provided, and the water to be treated flowing down in the post-separation chamber 5 passes through the coarse-grained shading element 16 outward from inside.

[0032] Like the coarse-grained ridge element 9 in the first-stage separation chamber 4, the coarse-grained ridge element 16 in the second-stage separation chamber 15 is also converted into a so-called hydrophilic fiber having a strong interaction with water. It is composed of

Further, the post-stage separation chamber 15 is provided with an outlet 17 for the water to be treated at the bottom thereof, and an oil extraction port 18 opening below the partition plate 3, and An oil extraction port 19 is provided at the lower side of the support plate 15.

[0034] In this case, the coarse-grained element 9 in the first-stage separation chamber 14 has a relatively coarse-grained force such that the size of the mesh is, for example, 50 microns. The dagger element 16 has a fine eye, for example, having an eye of 2 microns.

[0035] Each of the oil extraction ports 12, 13, 18, and 19 is provided with an on-off valve 12a, 13a, 18a, 19a.

[0036] A solid particle component contained in the water to be treated is filtered between an outlet 10 from the first-stage separation chamber 14 and an inlet 14 to the second-stage separation chamber 15 by filtration. A filter 20 for separation is provided.

[0037] The filter 20 is configured as shown in FIG. That is, the filter 20 has a main body 20c provided with an inlet 20a connected to the outlet 10 and an outlet 20b connected to the inflow port 14, and is detachably mounted on the main body 20c with bolts 20d. The filter element 20e comprises a cylindrical filter element 20e, and a cover case 20f which is detachably attached to the main body 20c so as to hermetically seal the entire filter element 20e. It is configured to pass through 20e from the inside to the outside and then exit through exit 20b! RU

[0039] In this case, the filter element 20e in the filter 20 is formed of a so-called hydrophilic fiber having a strong interaction with water, like the coarse-graining elements 9 and 16, and The size of the filter element 20e in the filter 20 is, for example, 12 μm if the size of the coarse-grained element 16 in the latter separation chamber 15 is 2 μm. The force is the same as or smaller than that of the coarse-grained dagger element 16 in 1-5.

In this configuration, the water to be treated containing the oil component and the solid particle component is first supplied tangentially from the supply port 6 into the pre-stage separation chamber 4, and then into the pre-stage separation chamber 14. As a result, a part of the large oil droplet is separated so as to float toward the top in the pre-stage separation chamber 14.

Next, when passing through the metal mesh 7 built in the pre-stage separation chamber 14, the oil droplets are partially aggregated with each other and coarsened into large oil droplets, and Separate so that it floats against the top of the.

[0042] Next, by passing through the coarse-graining element 9 incorporated in the pre-stage separation chamber 14, the oil droplets in the water to be treated are aggregated and coarsened with each other, and then formed by the hydrophilic fiber. It separates quickly without adhering to the coarse-grained drier element 9 and floats against the top of the pre-separation chamber 4 and the lower surface of the support plate 8.

[0043] The water to be treated, from which the oil has been separated in the pre-stage separation chamber 14 in this manner, reaches the filter 20 from the outlet 10 at the bottom of the pre-stage separation chamber 14, and is filtered by the filter 20. By filtering through the filter element 20c, the solid particle components contained in the water to be treated are separated and removed.

[0044] In this case, the filter element 20c of the filter 20 is a hydrophilic fiber. By using fibers, it is possible to surely reduce the occurrence of clogging due to oil adhering to the filter element 20c.

Next, the water to be treated that has flowed out of the filter 20 also flows into the post-stage separation chamber 15 with an inflow port 14 force, and the fine-grained coarse grains embedded in the post-stage separation chamber 15 are provided. By passing through the element 16, the fine oil droplets in the water to be treated agglomerate and coarsen with each other, and then quickly separate without adhering to the coarse-grained drier element 16 made of the hydrophilic fiber. Separation is performed such that it floats against the top of the rear separation chamber 15 and the lower surface of the support plate 15.

The water to be treated whose oil content has been reduced by this separation is discharged from the discharge port 17 at the bottom of the second separation chamber 15, while the top of the first separation chamber 14 and the support plate 8 The oil floating on the lower surface, the top of the post-separation chamber 15 and the lower surface of the support plate 15 is turned on and off at the respective oil extraction ports 12, 13, 18 and 19 when an appropriate amount is accumulated. By opening 12a, 13a, 18a, 19a, it is discharged outside.

According to an experiment using the apparatus having the above-described configuration, when water to be treated having an oil concentration of about 2400 to 3400 ppm was supplied to the pre-stage separation chamber 14, the water was discharged from the post-stage separation chamber 5. It was possible to reduce the oil concentration of the treated water to about 7-9 ppm.

By the way, in the above experiment, the water to be treated discharged from the discharge port 10 in the pre-stage separation chamber 14 is directly filtered into the post-stage separation chamber 15 without being filtered. In the case where the introduction is performed through the inlet 14, the oil concentration in the water to be treated discharged from the discharge port 17 of the post-stage separation chamber 15 can only be reduced to about 30 ppm.

[0049] For this reason, the filter 20 only separates the solid particle component in the water to be treated and does not separate the oil component. However, by using the filter 20, the water to be treated is It has been found that the oil concentration in can be further reduced.

[0050] The coarse-graining elements 9, 16 and the filter element 20c are not limited to hydrophilic fibers as described above, but may be hydrophobic fibers that have been subjected to hydrophilic treatment. Because it may be constructed by innumerable micro holes in a hydrophilic film

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Claims

The scope of the claims

[1] A pre-stage separation chamber having a relatively coarse-grained element therein, and a coarse-grained element having a finer grain than the coarse-grained element in the pre-stage separation chamber. A second-stage separation chamber, and water to be treated is supplied to the first-stage separation chamber;

V, the oil-water separation device configured to send the water to be treated discharged from the first-stage separation chamber 1 to the second-stage separation chamber 1;

It is provided with a filter that separates the solid particle component contained in the water to be treated from the first separation chamber 1 to the second separation chamber 1 by filtering it with a filter element. Oil-water separator.

[2] The inside of the vertical sealed container is partitioned by a partition plate into an upper pre-stage separation chamber and a lower post-stage separation chamber. A coarse-grained shading element is provided, and water to be treated supplied from a supply port at an upper portion of the first-stage separating chamber is provided below the coarse-grained shading element after passing through the coarse-graining shading element in the first-stage separating chamber. In the second-stage separation chamber, a coarse-grained ridge element finer than the coarse-grained ridge element in the first-stage separation chamber is provided in the second-stage separation chamber. The inflow rocker in the upper part thereof is configured such that the inflowing water to be processed passes through the coarse-graining element in the post-stage separation chamber 1, and then the discharge rocker provided therebelow is also discharged. Further, there is provided a filter which is configured to separate solid particulate components contained therein by filtering the water to be treated reaching an inlet of the first separation chamber with a filter element. An oil-water separator, provided separately from the closed container.

[3] In the above-mentioned [1] or [2], the filter element in the filter is the same filter element as the coarse-grained ridge element in the post-separation chamber or the post-separation chamber. An oil-water separation device, characterized in that the filter element has a smaller size than the coarse-grained drier element in (1).

[4] The oil-water separation device according to any one of claims 13 to 13, wherein the coarse-grained shading element in the post-separation chamber is a hydrophilic material. 15. The oil-water separator according to claim 14, wherein the filter element in the filter is a hydrophilic material.