JP2001104705A - Oil-water separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-water separation device, in which anxiety for environmental pollution is not caused because chemicals are not entirely used and separation of the mixture liquid of water and oil can be performed easily and quickly by a simple and compact equipment. SOLUTION: This oil-water separation device is equipped with a cyclone part 21 roughly separating the mixture liquid 2 of water and oil and formed of both a specific gravity difference separation tank 3, in which the mixture liquid roughly separated in the cyclone part is separated into water and an oil by the difference of specific gravity, and a lower part separation tank 4 which is positioned in the lower part of the specific gravity difference separation tank and is spirally provided with brushes 25 moreover separating the mixed liquid unable to be sufficiently separated in the specific gravity difference separation tank. An oil discharge part 40 discharging separated oil is provided in the upper part of the specific gravity difference separation tank. A fitting shaft 26 of the brushes is hollow and the upper and lower parts 27, 28 are opened. The upper part is positioned in the inside of a mixed liquid-flowing path 30 which joins the specific gravity difference separation tank provided in the center of the same to the lower separation tank. The lower part is positioned in the inside of the lower separation tank and the fitting shaft is connected to a driving part 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-water separator, and more particularly, to a scum in a sewage treatment plant, a food factory, a coolant oil of a machining center, a recovered oil after recovering a floating oil in a degreasing process of plating, and the like. Oil-water separator.

[0002]

2. Description of the Related Art Conventionally, for example, oil from factory wastewater usually flows in various miscellaneous states. Depending on the contents of daily work, the oil content may be completely different from the season, temperature, water temperature, wastewater mixture and the like. What is not unified is the current situation of wastewater containing oil and foreign matter.

[0003]

However, the treatment of such wastewater in a wastewater treatment plant requires not only the expense of power consumption and a large facility but also the use of a large amount of chemicals. There were problems such as having to worry about the effect on the environment.

The present invention solves the above-mentioned problems, and in particular, does not use any chemicals, so that there is no concern about environmental pollution, and separation of a mixed liquid in which water and oil are mixed by a simple and compact facility. An object of the present invention is to propose an oil-water separation device that can be easily and quickly performed.

[0005]

According to another aspect of the present invention, there is provided an oil-water separator, comprising: a cyclone section for roughly separating a mixed liquid containing oil in water; And a specific gravity difference separation tank that separates the mixed liquid roughly separated into water and oil by a specific gravity difference, and cannot be sufficiently separated by the specific gravity difference separation tank located at the lower portion of the specific gravity difference separation tank. The mixed liquid is further formed by a lower separation tank for separating water and oil, and the lower separation tank is provided with a spiral brush, while being separated on the upper part of the specific gravity difference separation tank. A mixed liquid flow passage for connecting the specific gravity difference separation tank and the lower separation tank provided at the center of the specific gravity difference separation tank at an upper portion of a mounting shaft provided with an oil discharge portion for discharging the oil, and provided with the brush. The lower part is inside the lower separation tank With the respective position, wherein the mounting shaft is characterized in that it is connected to a drive unit.

[0006] The mounting shaft may be hollow and open at upper and lower portions thereof.

Further, the oil discharging section may be provided with a scraping means for scraping the oil discharged into the oil discharging section.

Further, an annular float is disposed at a lower portion of a mixed liquid flow passage which is provided at the center of the specific gravity difference separation tank and connects the specific gravity difference separation tank and the lower separation tank. Is also good.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an oil / water separator according to the present invention. The oil / water separator 1 separates a mixed liquid 2 containing oil into water into water and oil by a specific gravity difference. A separation tank 3, and a lower separation tank 4 that is located below the specific gravity separation tank 3 and that further separates the mixed liquid 2 that has not been sufficiently separated in the specific gravity separation tank 3 into water and oil. It is mainly composed by

The specific gravity difference separating tank 3 is formed in an annular shape as shown in FIGS. 1 and 3, and the upper part of the outer side wall 3a and the inner side wall 3b of the specific gravity difference separating tank 3 has a substantially 8-shaped inside. The opening 5 is formed at the tip. The distal end of the outer wall 3a further extends to near the center, and an opening 6 is formed near the center. Further, a through hole 9 is perforated on one side of the bottom surface of the specific gravity difference separating tank 3, and a float mounting portion 10 formed of a square tube is formed on an upper portion of the bottom surface corresponding to the through hole 9. A float 11 made of polypropylene is attached to the float mounting portion 10 so as to be vertically movable. The through-hole 9 communicates with a lower separation tank described later. The buoyancy of the float 11 is 0.97. Further, a check valve may be provided instead of the float 11.

Next, in the lower part of the specific gravity difference separation tank 3, a cylindrical lower separation part for further separating the mixed liquid 2 which could not be sufficiently separated in the specific gravity difference separation tank 3 into water and oil. A tank 4 is provided, and a tooth-shaped oil spill remover 14 is provided on one side surface of the lower separation tank 4. A drain pipe 15 communicating with the outside is attached below the other side surface of the lower separation tank 4. The drain pipe 15 is bent vertically, and the upper end thereof is located at substantially the same position as the upper part of the specific gravity difference separation tank 3. It is formed in a hopper shape.

An L-shaped short pipe 18 is disposed at the center in the upper part of the drain pipe 15 and the pipe 1
The tip of 8 protrudes outside from the inner side surface of the upper part of the drain pipe 15. An adjusting member 19 that can be adjusted to correspond to the liquid level of the drainage is screwed into the upper part of the pipe 18.

Near the other side of the upper part of the specific gravity difference separating tank 3, a cyclone section 21 for first roughly separating the mixed liquid 2 containing oil in water is provided.
On one side of the upper part 1, an inlet 22 for the mixed liquid 2 is provided. The tip of a pipe 23 provided below the cyclone portion 21 is located below the specific gravity difference separating tank 3.

Next, a brush 25 made of a thin metal wire or the like is provided in the lower separation tank 4.
The brush 25 is spirally mounted on a mounting shaft 26. The mounting shaft 26 is a hollow upper and lower member 26a,
26b are screwed together, and openings 27 and 28 are provided on the upper and lower side surfaces. Further, a float 29 made of polypropylene is accommodated in the mounting shaft 26, and the float 29 moves up and down to form an opening 27 provided in the upper member 26a.
Open and close.

The brush 25 is rotated when the lower separation tank 4 is rotated.
The brush 25 is formed so as to engage with the tooth-shaped oil spill remover 14 provided on one side surface of the brush and remove the oil attached to the brush 25. The buoyancy of the float 29 is 0, 9
7

The upper portion of the mounting shaft 26 is provided at the center of the specific gravity difference separation tank 3 and is positioned at the center of the mixed liquid flow passage 30 connecting the specific gravity difference separation tank 3 and the lower separation tank 4.
The lower portion is supported by a bearing portion 32 provided at the bottom of the lower separation tank 4. Further, an output shaft 34 of a drive unit 33 having a motor provided as a drive source provided above the specific gravity separation tank 3 is fixed to the upper portion of the mounting shaft 26. This output shaft 34
Is a rotating shaft 3 of the driving unit 33 via a coupling 36.
3a is preferred. Further, an annular float 35 made of polypropylene is disposed below the mixed liquid flow passage 30 at a boundary with the lower separation tank 4, and the annular float 35 has a specific gravity difference. It is located in a guide wall 37 provided at the bottom of the separation tank 3. The buoyancy of the annular float 35 is 0.97.

Reference numeral 38 designates a scraping plate attached substantially at the center of the output shaft 34. The rotation of the output shaft 34 causes the scraping plate 38 to rotate near the upper opening 6 of the specific gravity difference separating tank 3. Oil attached to the back side can be scraped off.

Next, an oil discharge portion 40 for discharging separated oil is formed so as to be continuous with the opening 6 provided at the upper portion of the specific gravity difference separation tank 3, and the oil discharge portion 4 is formed.
0 is provided with a discharge pipe 41 for discharging oil to the outside. At a position facing the discharge pipe 41, a scraping blade 42 that collects oil and guides the oil into the discharge pipe 41 is supported by a support shaft 39 in a movable state, and the support shaft 39 of the scraper blade 42 is It is provided so as to be rotated by the tab 43.

The scraping blades 42 and the motor 43 for rotating the scraping blades 42 form a scraping means.

Since the oil / water separator 1 is constructed as described above, first, in using the same, the mixed liquid 2 in which oil is mixed in water transferred from a floating oil recovery pump (not shown) is used. After flowing into the cyclone section 21, it is first roughly separated. At this time, the inflow speed differs due to the difference in specific gravity, the liquid rotates, heavy water moves outward, and light oil collects in the center. Then, the oil components gather together, roughly sulfurate, move to the lower portion and enter the specific gravity difference separation tank 3, and the light oil component immediately floats and is discharged to the oil content discharge portion 40 from the opening 6 provided at the upper portion of the specific gravity difference separation tank 3. Then, the oil is raked into the discharge pipe 41 by the rake blades 42 provided in the oil discharge section 40, discharged to the outside, and processed.

Next, the mixed liquid 2 from which the light oil content in the specific gravity difference separation tank 3 has been removed rises in the specific gravity difference separation tank 3 while rotating slowly, and in this process, the crude sulfurized oil content becomes buoyant. The oil is discharged from the opening 6 provided in the upper part of the specific gravity difference separation tank 3 to the oil discharge section 40, and is scraped into the discharge pipe 41 by the scraping blades 42 provided in the oil discharge section 40, discharged to the outside and processed. You.

The mixed liquid 2 which has not been sufficiently separated falls through the mixed liquid flow passage 30 provided at the center of the specific gravity difference separation tank 3 and is provided at the boundary between the specific gravity difference separation tank 3 and the lower separation tank 4. While slowly moving from the outer surface of the annular float 35 into the lower separation tank 4 and passing through the brush 25 formed by a thin metal wire spirally arranged in the lower separation tank 4, The liquid that has adhered to the surface and has been deoiled is returned to the outside through the drain pipe 15 or to a storage tank (not shown) for reuse.

The spirally provided brush 25 may be made of a resin such as polypropylene.

Incidentally, it is necessary to periodically rotate the brush 25 in order to maintain the reduction of the drainage oil content. In this case, the attachment shaft 2 on which the brush 25 is spirally attached
When the motor 6 is rotated by a driving unit 33 using a motor as a driving source, the liquid at the bottom in the lower separation tank 4 moves upward, and the bottom in the lower separation tank 4 becomes negative pressure, and The float 29 in the mounting shaft 26 is lowered and the liquid flows in from the upper opening 27 and is discharged from the lower opening 28. By repeating this, the liquid circulates and a flow velocity is obtained, whereby the oil attached to the surface of the brush 25 can be removed.

The above operation may be performed after stopping the floating oil recovery pump (not shown).

As described above, since the oil-water separator 1 does not use any chemicals, there is no need to worry about environmental pollution, and a simple and compact equipment can easily separate a mixed liquid in which water and oil are mixed. Can be done quickly.

In addition, a lower separation tank 4 is provided below the specific gravity difference separation tank 3 for further separating the mixed liquid that could not be sufficiently separated in the specific gravity difference separation tank 3 into water and oil. Since the lower separation tank 4 has a structure in which the brush 25 formed of a thin metal wire is helically arranged, the mixed liquid can be more reliably separated.

The oil adhering to the brush 25 can be easily removed by rotating a mounting shaft 26 to which the brush 25 is mounted via a driving unit 33 using a motor as a driving source. it can. Further, since the vicinity of the tip of the brush 25 is provided so as to engage with the tooth-shaped oil scum remover 14 provided on one side surface of the lower separation tank 4, the vicinity of the tip of the brush 25 is attached. The removed oil can be removed by the oil spill remover 14.

Further, an annular float 35 is provided at the boundary between the mixed liquid flow passage 30 provided at the center of the specific gravity difference separation tank 3 and the lower separation tank 4, so that the specific gravity difference separation tank 3 is provided.
The mixed liquid, which could not be separated sufficiently by the above, can be reliably moved by the brush 25 by pushing down the float 35 by the liquid flow and slowly moving the mixed liquid from the outer surface into the lower separating tank 4. .

Further, since a scraping plate 38 is attached to substantially the center of the output shaft 34 of the drive unit 33 which uses a motor as a drive source, the output shaft 34 is rotated so that the scraping plate 38 The oil attached to the back side near the opening 6 in the upper part of the specific gravity difference separating tank 3 can be scraped off.

An adjusting member 19 that can be adjusted to correspond to the liquid level of the drainage is screwed to the upper part of a pipe 18 provided at the center of the upper part of the drainage pipe 15. The adjustment member 19 can be adjusted by rotating the adjustment member 19 in accordance with the surface.

Further, at a position facing the discharge pipe 41 provided in the oil discharge section 40, a scraper blade 42 for collecting the oil discharged to the oil discharge section 40 and guiding the oil into the discharge pipe 41 is pivotally supported in a movable state. And the raked blades 42
Is provided so as to be rotated by the motor 43, so that the oil can be surely guided into the discharge pipe 41.

[0034]

As described above, according to the first aspect of the present invention, there is provided a cyclone section for roughly separating a mixed liquid in which oil is mixed in water, and a mixed liquid roughly separated in the cyclone section is provided. Further, a specific gravity difference separation tank that separates into water and oil by a specific gravity difference, and a mixed solution that is located at the lower part of the specific gravity difference separation tank and that cannot be sufficiently separated by the specific gravity difference separation tank is further mixed with water. Since it is formed by a lower separation tank in which a brush is disposed in a spiral shape that separates oil and oil, there is no need to use any chemicals for separation, so there is no need to worry about environmental pollution, and it is simple and compact. Separation of a mixed solution in which water and oil are mixed can be easily and quickly performed by the equipment.

Further, since an oil discharge section for discharging separated oil is provided at the upper portion of the specific gravity separation tank, the oil separated by specific gravity is reliably discharged to the oil discharge section and taken out to the outside. Can be.

Further, the attachment shaft on which the brush is spirally disposed is hollow and has upper and lower portions opened, and the upper portion is provided with the specific gravity difference separation tank and the lower separation tank provided at the center of the specific gravity difference separation tank. In the mixed liquid flow path to be connected, the lower portions are respectively located in the lower separation tanks, and the mounting shaft is connected to a driving unit. It is possible to remove the oil attached to the surface.

According to the second aspect of the present invention, the mounting shaft on which the brush is spirally mounted is hollow and has openings at the upper and lower portions thereof. By rotating, the spirally mounted brush also rotates in the same manner, whereby the liquid in the lower separation tank moves upward, and the bottom of the lower separation tank becomes negative pressure. Liquid flows in from the section, and the liquid is discharged from the lower opening, and the circulation of the liquid can more reliably remove the oil attached to the brush.

Further, according to the third aspect of the present invention, since the oil discharging section is provided with a scraping means for scraping the oil in the oil discharging section, the oil is reliably collected by the scraping means. Can be taken out.

Further, according to the fourth aspect of the present invention, an annular float is arranged at a lower portion of the mixed liquid flow passage connecting the specific gravity difference separation tank and the lower separation tank, so that the specific gravity difference separation tank can be used. The mixed liquid, which could not be separated sufficiently, is pushed down by the float by the liquid flow, slowly moved from the outer surface into the lower separating tank, and is surely separated by a brush arranged in the lower separating tank. be able to.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an oil-water separator according to the present invention.

FIG. 2 is a plan view of FIG. 1 with a part thereof omitted;

FIG. 3 is a cross-sectional view of a specific gravity difference separation tank in the oil-water separation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil-water separation apparatus 2 Mixed liquid 3 Specific gravity difference separation tank 4 Lower separation tank 25 Spiral brush 26 Mounting shaft 27 Upper opening 28 Lower opening 30 Mixed liquid flow path 33 Drive part 40 Oil discharge part

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E02B 15/10 E02B 15/10 A E03F 5/16 E03F 5/16 (72) Inventor Masamitsu Yanagisawa Tokyo 2-4-2 Azabudai, Minato-ku F-term in World Chemical Co., Ltd. (reference) 2D025 BA21 2D063 AA01 DB08 4D051 AA01 AA04 BA04 BA07 BA08 BA10

Claims (4)

[Claims] 1. A specific gravity difference separation tank comprising a cyclone section for roughly separating a mixed liquid containing oil mixed in water, and further separating the mixed liquid roughly separated in the cyclone section into water and oil by a specific gravity difference. And a lower separation tank which is located at a lower portion of the specific gravity difference separation tank and further separates a mixed solution which could not be sufficiently separated by the specific gravity difference separation tank into water and oil. The separation tank is provided with a brush in a spiral shape, while an upper part of the specific gravity difference separation tank is provided with an oil discharge unit for discharging separated oil, and an upper part of a mounting shaft on which the brush is disposed is provided. In a mixed liquid flow passage provided at the center of the specific gravity difference separation tank and connecting the specific gravity difference separation tank and the lower separation tank, the lower part is located in the lower separation tank, and the mounting shaft is a driving unit. Characterized by being connected to Oil-water separator. 2. The oil / water separation device according to claim 1, wherein the mounting shaft is hollow and openings are formed at upper and lower portions thereof. 3. The oil-water separation device according to claim 1, wherein said oil discharging section is provided with a scraping means for scraping the oil discharged into the oil discharging section. 4. An annular float is disposed at a lower portion of a mixed liquid flow passage provided in the center of the specific gravity difference separation tank and connecting the specific gravity difference separation tank and a lower separation tank. The oil-water separation device according to claim 1.