JP2001321605A - Oil/water separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and rapidly perform the separation of a liquid mixture of water with oil by using a simple and compact equipment without the fear of environmental pollution because any chemical is not used. SOLUTION: This oil/water separation device provided with a cyclone part 21 for roughly separating the liquid mixture 2 of water with oil is constituted of a gravity separation vessel 3 for separating the liquid mixture roughly separated in the cyclone part 2 into water and oil by the difference of the specific gravity and a lower part separation vessel 4 positioned below the gravity separation vessel, for separating further the liquid mixture insufficiently separated in the gravity separation vessel into water and oil and having brushes arranged spirally, and an oil content discharge part 40 for discharging the separated oil content is provided above the gravity separation vessel, an attaching shaft 26 for the brush is hollow and has an opening part 27 provided at the upper part and a rotary member 28 provided at the lower part and the upper part is positioned in a liquid mixture flow passage 30 provided in the center of the gravity separation vessel and for connecting gravity separation vessel to the lower part separation vessel, and the lower part is positioned in the lower part separation vessel and the attaching 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, the oil content of factory wastewater usually flows in various miscellaneous states. 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]

Means for Solving the Problems As means for solving the above problems, an oil / water separation device according to the present invention is a separation device for separating a mixed liquid in which water is mixed with oil into water and oil. And the following requirements. (A) A cyclone section for roughly separating a mixed liquid containing oil in water is provided. (B) The mixed liquid roughly separated in the cyclone section is further separated into water and oil by a difference in specific gravity. A specific gravity difference separation tank is provided. (C) In the lower part of the specific gravity difference separation tank, a lower separation for further separating a liquid mixture that could not be sufficiently separated in the specific gravity difference separation tank into water and oil. A tank is provided. (D) A brush is disposed spirally in the lower separation tank,
An oil discharging portion for discharging separated oil is provided at an upper portion of the specific gravity separation tank. (E) An upper portion of a mounting shaft to which the brush is mounted is provided at a center of the specific gravity separation tank, and The lower part is located in the lower separation tank in the mixed liquid flow passage connecting the specific gravity difference separation tank and the lower separation tank, and the mounting shaft is connected to a drive unit. The shaft is formed in a hollow shape, an opening is provided in the upper part, a rotating member is attached to the lower part, and the rotating member is provided with a blade.

Preferably, the inside of the specific gravity difference separation tank is formed in a spiral shape.

The oil discharging section may be provided with a scraping means for collecting and collecting the oil discharged into the oil discharging section and leading the oil to a water distribution pipe.

It is desirable that an annular float be disposed at a lower portion of the mixed liquid flow passage provided in the center of the specific gravity difference separation tank and connecting the specific gravity difference separation tank and the lower separation tank.

[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 which is located below the specific gravity difference separation tank 3 and further separates the liquid mixture 2 which has not been sufficiently separated in the specific gravity difference separation tank 3 into water and oil. It is mainly composed.

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 eight-shaped inside. And an opening 5 is formed at the tip thereof. The distal end of the outer wall 3a further extends to the vicinity of the center, and an opening 6 is formed near the center. The outer wall 3a and the inner wall 3
A spiral portion 7 is formed by a plate-like member in the specific gravity difference separating tank 3 between the spiral portion 7 and the b. A rectangular through hole 9 is formed on one side of the bottom surface of the specific gravity difference separating tank 3, and a lid member 11 is provided with a support shaft 12 on an upper surface corresponding to the through hole 9.
The fulcrum is provided to be freely opened and closed. The through hole 9 communicates with a lower separation tank described later.

The lid member 11 is preferably formed of a resin such as polypropylene, but may be formed of a light metal.

Next, a lower portion of the specific gravity difference separation tank 3 is provided with a cylindrical lower portion for further separating the mixed liquid 2 that could not be sufficiently separated in the specific gravity difference separation tank 3 into water and oil. A separation 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 part 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 of the upper part of the drain pipe 15 in the hopper shape, and a tip of the pipe 18 projects outward from a side surface inside the upper part of the drain pipe 15. Have been. A cylindrical 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.
Handles 20 having an inverted U shape for facilitating rotation are provided on both side surfaces of 9.

Near the other side of the upper portion of the specific gravity difference separation 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 inside of the specific gravity difference separation tank 3 and is bent at substantially a right angle.

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 provided at the center. The mounting shaft 26 is formed by screwing hollow upper and lower members 26a and 26b, an opening 27 is provided on the upper side surface, and a rotating member 28 is fixed on the lower portion. The brush 25 is a tooth-shaped oil spill remover 14 provided on one side of the lower separation tank 4 during rotation.
The brush 25 is provided so as to remove oil attached to the brush 25. Note that the brush 25 may be formed of resin.

As shown in FIG. 4, the rotating member 28 is formed by a pair of disks 28a and a plurality of blades 28b arranged at equal intervals between the disks 28a. The mixed liquid 2 passing through the inside of the mounting shaft 26 is
And is guided to the lower separation tank 4 through each of the blades 28b.

The upper portion of the mounting shaft 26 is provided at the center of the specific gravity difference separation tank 3 and is located at the center of the mixed liquid flow passage 30 connecting the specific gravity difference separation tank 3 and the lower separation tank 4.
A spindle 3 provided at the bottom of the disk 28a of the lower rotating member 28
Reference numeral 1 denotes a bearing mounted on a bearing portion 32 provided at the bottom of the lower separation tank 4. Further, an output shaft 34 of a driving unit 33 having a motor provided as a driving source provided above the specific gravity separation tank 3 is fixed above the mounting shaft 26. The output shaft 34 is connected to a rotation shaft 33 of the drive unit 33 via a coupling 36.
a. Further, an annular float 35 made of polypropylene is disposed at a lower portion of the mixed liquid flow passage 30 and below the lower separation tank 4, and the annular float 35 is separated by a specific gravity difference. It is arranged in a guide wall 37 provided at the bottom of the 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 scraping plate 38 is provided near the opening 6 above the specific gravity difference separating tank 3 when the output shaft 34 rotates. It is formed to scrape off the oil attached to the back side.

Next, an oil discharge section 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 section 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 for collecting oil and guiding the oil to the inside of the discharge pipe 41 is pivotally supported by a support shaft 39, and the support shaft 39 of the scraper blade 42 is It is provided so as to be rotated by a counter 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 has been removed in the specific gravity difference separation tank 3 rises up the specific gravity difference separation tank 3 along the spiral portion 7 formed by the plate-like member while rotating slowly. Since the oil which has been roughly sulfurized in this process has buoyancy, it is discharged from the opening 6 provided in the upper part of the specific gravity separation tank 3 to the oil discharge 40, and the oil discharge 4
0, the discharge pipe 4
1 and is discharged to the outside and processed.

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 formed of a resin such as polypropylene.

Incidentally, it is necessary to periodically rotate the brush 25 in order to keep the drain oil content reduced. 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, the liquid flows in from the upper opening 27, and is discharged to the lower separation tank 4 through the space between the blades 28b of the lower rotating member 28. By repeating this, the liquid is circulated by the rotating member 28 to obtain a flow velocity, and the oil adhering to the surface of the brush 25 can be removed.

Further, as the rotating member 28 rotates, the pressure in the lower separation layer 4 is increased by the liquid guided from the opening 27 to the lower separation tank 4. The cover member 11 covered by the provided through hole 9 opens, and the oil removed from the surface of the brush 25 passes through the through hole 9 and passes through the opening 6 provided at the upper portion of the specific gravity separation tank 3 to discharge the oil. It is discharged to 40.

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 brush 25 formed of a thin metal wire is spirally arranged in the lower separation tank 4, the mixed liquid can be separated more reliably.

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 mounting shaft on which the brush is spirally disposed is hollow and has an upper opening, and a rotating member is mounted on the lower portion, and the rotating member is provided with blades.
The upper part of the mounting shaft is disposed in a mixed liquid flow passage connecting the specific gravity difference separating tank and the lower separating tank, and the lower part is disposed in the lower separating tank, and the mounting shaft is connected to a driving unit. Therefore, the oil attached to the brush can be removed by rotating the mounting shaft via the driving unit.

According to the second aspect of the present invention, since the inside of the specific gravity difference separating tank is formed in a spiral shape, the oil component of the fine particles coarsely mixes with water while slowly rising along the back surface of the spiral portion. The oil is granulated to increase buoyancy and becomes concentrated oil, which is discharged to the oil discharge portion and can be taken out.

According to the third aspect of the present invention, the mounting shaft to which the brush is spirally mounted is hollow and has an opening formed in the upper part thereof and the rotating member mounted in the lower part thereof. Is rotated through the drive unit, so that the spirally mounted brush also rotates in the same manner, whereby the liquid in the lower separation tank moves upward, and the bottom in the lower separation tank becomes negative pressure. The liquid flows in from the opening at the upper part of the mounting shaft, and the liquid is discharged from the lower rotating member. By circulating the liquid, the oil attached to the brush can be more reliably removed.

In the above, the internal pressure of the lower separation tank is increased by the liquid guided from the opening to the lower separation tank by the rotation of the rotating member, thereby covering the through hole provided on one side of the bottom surface of the specific gravity difference separation tank. The oil removed from the surface of the brush with the lid member opened can pass through the through-hole, and can be discharged to an oil discharge part from an opening provided in the upper part of the specific gravity difference separation tank.

According to the fourth aspect of the present invention, since the oil discharging section is provided with the scraping means for scraping the oil in the oil discharging section, the oil is reliably collected and collected by the scraping means. Can be taken out.

[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.

FIG. 4 is a partially broken perspective view showing a mounting relationship between a mounting shaft and a rotating member.

[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 part 28 Rotating member 30 Mixed liquid flow path 33 Drive part 40 Oil discharge part

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) B01D 17/038 B01D 17/038 C02F 1/40 C02F 1/40 A (72) Inventor Masamitsu Yanagisawa Azabudai, Minato-ku, Tokyo 2-4-2 F term in World Chemical Co., Ltd. (reference) 4D051 AA01 BA08 BA09 BA10

Claims (4)

[Claims] 1. An oil-water separation device for separating a mixed liquid containing oil mixed with water into water and oil, which satisfies the following requirements. (A) A cyclone section is provided for roughly separating a mixed liquid in which oil is mixed in water. (B) The mixed liquid roughly separated in the cyclone section is further separated into water and oil by a difference in specific gravity. A specific gravity difference separation tank is provided. (C) In the lower part of the specific gravity difference separation tank, a lower separation for further separating a liquid mixture that could not be sufficiently separated in the specific gravity difference separation tank into water and oil. A tank is provided. (D) A brush is disposed spirally in the lower separation tank,
An oil discharge unit for discharging the separated oil is provided at the upper part of the specific gravity difference tank. (E) The upper part of the mounting shaft to which the brush is mounted is provided at the center of the specific gravity difference tank. (F) the mounting shaft is connected to a drive unit in a mixed liquid flow passage connecting the specific gravity difference separation tank and the lower separation tank, and the lower part is located in the lower separation tank. The shaft is formed in a hollow shape, an opening is provided in the upper part, a rotating member is attached to the lower part, and the rotating member is provided with a blade. 2. The oil-water separation device according to claim 1, wherein the inside of the specific gravity difference separation tank is formed in a spiral shape. 3. The oil / water separation device according to claim 1, wherein said oil discharging section is provided with a scraping means for collecting and collecting the oil discharged into the oil discharging section and guiding it to a discharge pipe. 4. The float according to claim 1, wherein 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 the lower separation tank. Oil-water separator.