KR20060119709A - Oil-water separator - Google Patents

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 {OIL-WATER SEPARATOR}

The present invention relates to an oil-water separation apparatus in which oil is separated from oil and water when oil is mixed with water to be treated such as waste water, such as bilge water in a ship.

Patent Literature 1, which is a prior art, introduces an oil-treated water into a shear separation chamber first, where a relatively coarse granulated element (i.e., minute oil droplets while passing through a perforation hole) is introduced. Through the material having the function of agglomerating and granulating the oil droplets, coarse oil droplets are floated and separated. Then, the water to be treated from the front separation chamber is introduced into the rear stage separation chamber, where It is proposed to separate the oil in the water to be treated at a high separation rate by coarse droplets of oil by passing through the granulated element with finer eyes than the granulated element.

Patent Document 1: Japanese Patent Application Laid-Open No. 8-309102

However, in this prior art, the separation rate of the oil can be further improved by making the eye of the granulated element finer in the latter stage separation chamber among the above separation chambers. By containing, this solid particle component will block the eye in the said granulation element with the eye in the said rear end.

That is, in order to refine the eye of the granulated element at the rear end in order to improve the separation rate of the oil, the eye of the granulated element at the rear end is blocked by the solid particle component contained in the water to be treated. There was a problem in that limits exist in that respect.

In this case, clogging due to the solid particle component contained in the treated water can be eliminated by separating and removing the solid particle component by filtering the treated water with a filter element in advance, but filtering the treated water in advance. The treatment significantly inhibits the filtration of the water to be treated, as the oil contained in the water to be treated rapidly clogs the filter element or significantly increases the filtration resistance. .

This invention makes it a technical subject to provide the oil-water separation apparatus which solved these problems.

Claim 1 of the present invention for achieving this technical problem,

"A shear separation chamber comprising a relatively coarse granulated element, and a rear stage separation chamber comprising a coarse element with finer eyes than the coarse element in the shear separation chamber, and shearing the water to be treated. In the oil-water separation device configured to supply to the separation chamber, and then to send the water to be treated discharged from the front-end separation chamber to the rear-side separation chamber,

And a filter configured to separate the solid particles contained therein by filtering the water to be treated from the front-end separation chamber to the rear-end separation chamber with a filter element.

In addition, claim 2 of the present invention,

"The vertically sealed container is partitioned by a partition plate into an upper shear separation chamber at the top and a rear separation chamber at the bottom, and a relatively coarse granulated element is installed in the shear separation chamber, and the upper portion thereof is placed in the shear separation chamber. The water to be supplied from the supply port in the front end separation chamber is passed through the granulation element in the front end separation chamber, and discharged from the discharge port formed below it, while in the rear end separation chamber in the front end separation chamber. A granulated element having a finer eye than that of the granulated element is provided, and the discharged water formed at the lower part after passing through the granulated element in the rear end separation chamber in the rear end separation chamber has passed through the granulated element in the rear end separation chamber. And discharge from the outlet of the shear separation chamber. By filtering the water to be treated up to the inlet end of the separation chamber to the filter element for a filter to separate the solid particle components contained in it, and a separately with the closed vessel. "Characterized in that.

Effects of the Invention

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 into the shear separation chamber, and the oil in the water to be treated by passing through the granulated element embedded in the shear separation chamber. The droplets coagulate and coarsen with each other to float and separate to the top in the shear separation chamber.

In this way, the water to be treated in which the oil is separated in the shear separation chamber reaches the filter from the shear separation chamber, and the solid particles contained in the water to be treated are separated by filtration through a filter element. · Removed.

Subsequently, the water to be treated flows into the rear separation chamber from the filter, and the fine oil droplets in the treated water are coagulated with each other and coarse by passing through the fine granulated element. It floats and separates to the upper part in the rear separating chamber.

In this case, in the water to be treated in which the eye in the rear-side separation chamber passes the fine granulated element, since the solid particle component is separated and removed in advance by the filter, the solid particle component is added to the fine granulated element. It is possible to reliably suppress the occurrence of clogging due to.

On the other hand, since the water to be treated filtered by the filter element in the filter has only a low oil concentration in the shear separation chamber, clogging is caused by the oil in the filter element of the filter. It can reliably reduce that which generate | occur | produces and that filtration resistance increases with oil.

However, the filter does not separate the oil simply by separating the solid particle component in the water to be treated, but as described in detail in the embodiment, experiments have shown that the filter is disposed between the shear separation chamber and the rear separation chamber. The overall separation rate of the oil content could be improved compared to the case where the filter was not installed.

Moreover, according to the structure of Claim 2, since the said front-separation chamber and the rear-end separation chamber can be integrated as one longitudinal sealed container, it is considerably small compared with the case where a shear-separation chamber and a rear-end separation chamber are comprised, respectively. · It can reduce the weight and reduce the floor area of the installation.

In this case, since the said filter is separate from the said airtight container, the filter element in this filter can be replaced easily.

As described in claim 3, the filter element in the filter is the same as the granulated element in the rear stage separation chamber, or the granulated element in the rear stage separation chamber. By using a filter element with a smaller eye, clogging of the granulated element in the rear stage separation chamber can be more reliably achieved.

In the granulated element, there is a so-called hydrophilic material that has a strong interaction with water and a so-called lipophilic material that has a strong interaction with oil.

Therefore, as described in claim 4, when the granulated element in the rear stage separation chamber is made of a hydrophilic material, oil droplets coagulated and coarse with each other when passing through the granulated element are applied to the granulated element having this hydrophilicity. Since they fall off quickly and float and separate without being attached, the separation rate of oil can be further improved.

In addition, as described in claim 5, by using the filter element in the filter as a hydrophilic material, it is possible to more reliably reduce clogging caused by oil in the filter element.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal front view which shows embodiment.

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

<Description of Symbols for Major Parts of Drawings>

1: sealed container 3: partition plate

4: Front separation chamber 5: Rear separation chamber

6: Supply port of the to-be-processed water 9: Rough granulated element

10: outlet of treated water 14: inlet of treated water

16: granulated element with fine eyes 17: outlet of treated water

12, 13, 18, 19: oil extraction port 20: strainer

20e: filter element

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described about drawing of FIG.

In FIG. 1, the code | symbol 1 shows the airtight container comprised from the vertical cylinder installed upright from the bottom surface 2. As shown in FIG.

The inside of the sealed container 1 is partitioned into an upper front separating chamber 4 and a lower rear separating chamber 5 by providing a partition plate 3.

In the upper part of the shear separation chamber 4, a supply port 6 for introducing the water to be treated and containing the solid particles into the shear separation chamber 4 is formed, and the supply port 6 ) Is formed in the tangential direction as seen from the axial direction of the sealed container 1, so that the water to be introduced from this supply port 6 is in the shear separation chamber 4 in the circumference of the axis of the sealed container 1. It is configured to turn.

In addition, a metal mesh layer 7 is provided at a portion of the shear separation chamber 4 below the supply port 6, and a through hole is formed at the center of the shear separation chamber 4 below the metal mesh layer 7. One support plate 8 is provided, and a lower surface of the support plate 8 is provided with a cylindrical granulation element 9 so that the water to be treated flowing down into the shear separation chamber 4 is provided with the granulation element 9. ) Is passed through from the inside to the outside.

The granulation element 9 in this shear separation chamber 4 is comprised from what is called hydrophilic fiber with strong interaction with water.

Further, the discharge separation port 10 of the treated water is formed at the bottom of the shear separation chamber 4, that is, above the partition wall 3, and the ceiling plate in the shear separation chamber 4 The oil extraction opening 12 which opens below 11) and the oil extraction opening 13 opening below the said support plate 8 are formed.

On the other hand, the uppermost part of the rear stage separating chamber 5, that is, the lower side of the partition plate 3, is to receive the water to be treated from the outlet 10 of the front separating chamber 4 to the rear stage separating chamber ( An inlet 14 for introducing into 5) is formed.

In the rear stage separating chamber 5, a support plate 15 having a through hole in the center of the lower portion of the inlet 14 is provided, and a cylindrical assembly element is formed on the lower surface of the support plate 15. As shown in FIG. (16) is provided, and it is comprised so that the to-be-processed water which flows in the said back stage separation chamber 5 may pass the said granulation element 16 from the inner side to the outer side.

The granulation element 16 in the rear stage separation chamber 5 is also made of so-called hydrophilic fibers with strong interaction with water, similarly to the granulation element 9 in the front separation chamber 4. have.

In addition, an outlet 17 of the water to be treated is formed at the bottom of the rear separation chamber 5, and an oil extraction port 18 and the support plate 15 which open to the lower side of the partition plate 3. An oil extraction opening 19 is formed which opens downward.

In this case, the granulated element 9 in the front separation chamber 4 is a relatively coarse eye as the eye is, for example, 50 microns, but the rear separation chamber 5 In the granulated element 16, the eye is made of fine eyes, for example, 2 microns.

In addition, on and off valves 12a, 13a, 18a, and 19a are provided at each of the oil extraction ports 12, 13, 18, and 19, respectively.

Between the outlet port 10 from the front-side separation chamber 4 and the inlet port 14 to the rear-side separation chamber 5, a filter for separating solid particles contained in the water to be treated by filtration ( 20) is installed.

This filter 20 is comprised as shown in FIG.

That is, the filter 20 includes a main body 20c having an inlet 20a connected to the outlet 10 and an outlet 20b connected to the inlet 14, and a bolt (b) on the main body 20c. A cylindrical filter element (20e) detachably mounted at 20d) and a cover case (20f) detachably mounted to seal the entirety of the filter element (20e) to the main body (20c). The water to be treated from 20a is configured to pass from the outlet 20b after passing the filter element 20e from the inside to the outside.

In this case, the filter element 20e in the filter 20 is made of so-called hydrophilic fibers with strong interaction with water, similarly to the above-mentioned granulation elements 9 and 16, and this filter The eye of the filter element 20e in (20) is the rear end so as to be 1 to 2 microns, for example, if the eye of the granulated element 16 in the rear end separation chamber 5 is 2 microns. It is made the same as the eye of the granulation element 16 in the separation chamber 5, or it is made small.

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 shear separation chamber 4, and then rotated in the shear separation chamber 4 so that a large amount of oil is produced. Some of the droplets are separated to rise towards the top in the shear separation chamber 4.

Subsequently, when passing through the metal mesh 7 embedded in the shear separation chamber 4, the oil droplets coagulate into large oil droplets by agglomerating part of each other and toward the top in the shear separation chamber 4. Separated to float.

Subsequently, the oil droplets in the water to be treated are coagulated and coarsened with each other by passing through the granulation element 9 embedded in the shear separation chamber 4, and then the granulation element 9 by the hydrophilic fibers. It is detached so as to float toward the top of the shear separation chamber 4 and the lower surface of the support plate 8 without being attached to it.

In this way, the water to be treated in which the oil is separated in the shear separation chamber 4 reaches the filter 20 from the outlet port 10 at the bottom of the shear separation chamber 4, and the filter 20 reaches the filter 20. By filtering with the filter element 20c, the solid particle component contained in this to-be-processed water is isolate | separated and removed.

In this case, since the filter element 20c in this filter 20 is a hydrophilic fiber, it can reliably reduce that this filter element 20c adheres to oil and clogging occurs.

Subsequently, the water to be treated from the filter 20 flows in from the inlet 14 into the rear end separation chamber 5 and passes through the fine granulated element 16 embedded in the rear end separation chamber 5. As a result, fine oil droplets in the water to be treated are coagulated and coarse with each other, and then the top and support plates 15 in the rear end separation chamber 5 are quickly separated without being attached to the granulated element 16 by the hydrophilic fibers. Is separated to rise toward the bottom of the.

The water to be treated having a lower oil concentration by this separation is discharged from the outlet 17 at the bottom of the rear separation chamber 5, while the uppermost part of the front separation chamber 4 and the support plate 8 are separated. Lower surface, the oil floating on the uppermost part of the rear separating chamber 5 and the lower surface of the support plate 15, at the time when the proper amount is collected at the respective oil extraction ports 12, 13, 18, 19 The open / close valves 12a, 13a, 18a, 19a are discharged to the outside.

According to an experiment using the apparatus of the above-described configuration, when the treated water having an oil concentration of about 2400 to 3400 ppm was supplied to the front separating chamber 4, the treated water discharged from the rear separating chamber 5 The oil concentration could be lowered to about 7-9 ppm.

By the way, in the said experiment, it is made to introduce the to-be-processed water discharged | emitted from the discharge port 10 in the said front-end separation chamber 4 into the said back-end separation chamber 5 from the inlet port 14 as it is, without filtering. In this case, the oil concentration in the water to be treated discharged from the outlet 17 of the rear stage separation chamber 5 could only be reduced to about 30 ppm.

In this regard, the filter 20 only separates the solid particle components in the water to be treated and does not separate the oil. However, by using the filter 20, the oil concentration in the water to be treated is further increased. It turned out that it can reduce.

In addition, each said granulation element 9 and 16 and the said filter element 20c are not limited to the thing by hydrophilic fiber as mentioned above, The hydrophobic fiber may be hydrophilized, or a hydrophilic film may be used. You may comprise the thing which perforated a microhole innumerably.

Claims (5)

A shear separation chamber formed by embedding relatively coarse granulated elements, and a rear stage separation chamber formed by embedding granulated elements with finer eyes than the granulated elements in the shear separation chamber, wherein the water to be treated is shear separated. In the oil and water separation device configured to supply to the chamber, and then to send the treated water discharged from the front end separation chamber to the rear end separation chamber, And a filter configured to separate the solid particles contained therein by filtering the water to be treated from the front separating chamber to the rear separating chamber with a filter element. The vertically sealed container is partitioned by a partition plate into an upper shear separation chamber and a lower rear separation chamber. A relatively coarse granulated element is installed in the shear separation chamber, and the upper separation chamber is disposed above the shear separation chamber. The water to be treated supplied from the supply port in the front separation chamber is configured to be discharged from the discharge port formed below the granulated element in the front separation chamber, and assembled in the shear separation chamber in the rear separation chamber. A granulated element having a finer eye than that of the fired element is provided, and the treated water introduced from the inlet at the upper portion of the rear stage separation chamber passes through the granulated element in the rear stage separation chamber, And discharge from the outlet of the shear separation chamber. By filtering the water to be treated up to the inlet end of the separation chamber to the filter element for a filter to separate the solid particle components contained in it, leading to separation, characterized in that provided separately from the closed vessel and the device. The filter element according to claim 1 or 2, wherein the filter element in the filter is the same filter element as the granulated element in the rear end separation chamber, or the eye smaller than the granulation element in the rear end separation chamber. Oil-water separator, characterized in that the filter element. 4. The oil / water separator according to any one of claims 1 to 3, wherein the granulated element in the rear stage separation chamber is a hydrophilic material. The oil / water separator according to any one of claims 1 to 4, wherein the filter element in the filter is a hydrophilic material.

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