JPH0621522Y2 - Oil removal tank for oil mixed aqueous solution - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to the oil content in an aqueous solution mixed with an oil content, such as a mixed liquid of a water-soluble cutting fluid and a machine lubricating oil used in a machine tool. The present invention relates to a device for removing.

(Prior Art) With regard to cutting oil used in machine tools, water-soluble cutting fluid, which has a low risk of fire occurrence and the like, has come to be used more and more with the progress of automation and unmanned cutting work. . However, this water-soluble cutting fluid deteriorates quickly when the lubricating oil of the machine tool is mixed, so it is necessary to remove the mixed oil.

Conventionally, a device such as a disk skimmer was used to remove oil mixed in the water-soluble cutting fluid, but since it requires a power supply to operate the device, it is inconvenient and there is a risk of fire, and equipment costs are maintained. It cost a lot. In addition, maintenance has to be performed regularly, which is troublesome. In addition, as an on-site method, the layered oil content floating on the surface of the water-soluble cutting fluid was also absorbed with a cloth, etc., but the oil removal state is insufficient, and the cloth that absorbed the oil content, etc. However, it was inconvenient because it took time to process.

Also, there is provided an oil separation device for wastewater treatment in which a plurality of parallel inclined plates are provided in the tank and the inclined plates are used to efficiently separate the oil.
No. 9-17560. An oil-water separator having a structure in which a central hollow portion is provided at the center of the tank, the ceiling is inclined, rising portions are provided at both ends, and one is an inlet and the other is an oil separation and discharge portion is disclosed in Japanese Utility Model Publication No. 59-176609. It is disclosed.

However, the oil component separation device for wastewater treatment disclosed in Japanese Patent Laid-Open No. 49-17560 requires a plurality of parallel inclined plates to be arranged, and further requires an oil content recovery chamber to be separately provided. Becomes Furthermore, the actual development Sho 59-1
In the case of Japanese Patent No. 76609, since the central hollow portion is provided in the center of the tank, there is a problem that the manufacturing cost becomes high, the input port is narrow, and the degree of freedom of the installation place is low.

Further, Japanese Utility Model Laid-Open No. 50-113974 discloses an oil-water separation tank in which a plurality of inclined separation plates are provided in the oil-water tank and the overflowed oil is discharged from above the final separation plate. Since the area of the lower side of the inclined separation plate of the final stage that discharges the overflowed oil content of this publication is as small as about 20% of the area of the lower side of the tank, oil and water are separated by the separation plate of the final stage where the upper side is narrow. The ability is low. Further, since a plurality of inclined separation plates are arranged side by side, the inlet for the oil water is narrow, and it is difficult to dispose the oil water directly below the machine where the oil water drips from a large area.

(Problem to be solved by the invention) The problem to be solved by the present invention is to improve the conventional oil content removing device in an aqueous solution, to have a simple structure, no power source is required, and there is no risk of fire and maintenance. To provide an oil removal tank that is extremely easy to use, requires little equipment and maintenance costs, has a simple structure, can be manufactured at low cost, and has a large liquid inlet port, which offers a high degree of freedom in installation location. is there.

(Means for Solving the Problem) The gist of the present invention, which has solved the above problem, is to obliquely attach a separation plate having both side edges adhered to an inner surface of a side wall of a tank having a predetermined shape, and to install two upper parts inside the tank. The upper part of the side wall of the divided part of the same part, which is narrower in the upper part of the two divided parts in the same part divided by the separation plate, is connected to the outside of the same part. An oil-containing aqueous solution characterized in that the tip of the eave-shaped portion is projected downward, and the upper opening of the divided portion, which is divided and widened upward, is used as an inlet for the oil-containing aqueous solution. It is in the oil removal tank.

(Operation) In the present invention, a separation plate having both side edges inscribed is obliquely provided on the inner surface of the side wall of the tank having a predetermined shape, and the inside of the tank is divided into two. However, since the separation plate is not in contact with the bottom of the tank, the vicinity of the bottom inside the tank is not divided. If an aqueous solution containing oil is put into the same tank, the same aqueous solution will enter the two divided parts inside the same tank, and the specific gravity of water on each of the same aqueous solution surfaces in the two divided parts. Due to the difference, the oil content floats and becomes a layer. When an aqueous solution containing oil is further put in the tank, the surface of the aqueous solution rises. Since the inside of the tank is divided into two by the diagonal separating plate, as the surface of the aqueous solution rises, the area of the aqueous solution surface becomes wider in one of the divided portions and becomes larger in the other divided portion. The area of the surface becomes smaller. At the divided part where the area of the aqueous solution surface becomes smaller as the aqueous solution surface rises, the layer thickness of the layered oil component floating on the aqueous solution surface becomes larger as the aqueous solution surface rises and the area becomes smaller. To go. On the other hand, with respect to the aqueous solution surface in the other divided portions, the reverse phenomenon occurs as the aqueous solution surface rises. Therefore, of the two divided parts divided by the diagonal separating plate, the height of the layered oil surface floating above the aqueous solution surface of the divided part whose upper part is narrower is higher than that of the other divided part. Get higher For this reason, the oil can be removed and collected by overflowing only the layered oil from the upper edge of the side wall of the divided portion whose upper portion is narrower. The upper edge of the side wall of the tank projects to the outside of the tank in the shape of an eaves, and the tip of the eaves-shaped part faces downward, so the overflowed oil will fall down along the eaves-shaped part. ing. Oil can be collected by placing a container at the oil drop point. The aqueous solution from which oil has been removed can be taken out and reused by providing an outlet slightly above the bottom of the same tank.

Use the oil removal tank of the present invention if you have an oil-containing aqueous solution, such as oil in water-soluble cutting fluid used in machine tools, etc., where the oil will float in layers due to the difference in specific gravity from water. Oil can be removed and recovered.

The oil removal tank of the present invention can be installed and used in the middle of the circulation path of the water-soluble cutting fluid that is continuously used while being circulated in a machine tool or the like.

It is also possible to install only the oil removal tank of the present invention independently and batch-process the used water-soluble cutting fluid.
Which method to use should be decided in consideration of the nature and amount of oil contained in the water-soluble cutting fluid to be treated, the total amount to be treated, and the like. Since the oil removal tank of the present invention does not require a power source such as electricity, it does not need to be installed near a power source, and there is no risk of fire due to electric spark or heat generation due to overload. Further, since there are no consumable parts and the like, maintenance is extremely easy and no maintenance cost is required.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway perspective view of the first embodiment, and FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a partially cutaway sectional view of the second embodiment.

In the oil removal tank (1) of Example 1, a separation plate (5) having both side edges (4) inscribed is provided obliquely on the inner surface of the side wall (3) of the tank (2).
The inside of (2) is divided into two. However, the separation plate (5) is a tank
Since it is not in contact with the bottom surface (6) of (2), the vicinity of the bottom surface (6) inside the tank (2) is not divided. Further, in the tank (2) divided by the diagonal separation plate (5), the upper edge (8) of the side wall (3) of the divided portion (7) whose upper part of the tank (2) is narrower is The eaves-like portion (9) is projected to the outside of 2) and the tip of the eaves-like portion (9) is directed downward. Further, the valve-equipped opening (10) in which the eaves-shaped portions (9) are integrated is provided at the tip of the eaves-shaped portion (9). In Example 1, the divided part
Since the upper part of (7) is sealed, the air vent hole (11)
Is provided. Furthermore, at the bottom of the tank (2) there is an outlet with a valve.
(12) is provided.

When the water-soluble cutting fluid (13) mixed with oil is put into the tank (2), the water-soluble cutting fluid (13) will be injected into the two divided parts (7) and (14) inside the tank (2). It will enter and the two divided parts
On the surface of the water-soluble cutting fluid (13) of each of (7) and (14), the oil component floats due to the difference in specific gravity with water to become layered oil components (15) and (16). Tank
When the water-soluble cutting fluid (13) mixed with oil is further put into (2), the surface of the water-soluble cutting fluid (13) rises. Tank (2)
Since the inside of the is divided into two by the diagonal separation plate (5), as the surface of the water-soluble cutting fluid (13) rises, the area of the water-soluble cutting fluid (13) surface at one divided part (14) Becomes wider, and the area of the water-soluble cutting fluid (13) surface becomes smaller at the other divided portion (7). Water-soluble cutting fluid in the divided part (7)
(13) Water-soluble cutting fluid as surface rises and area decreases
The layer thickness of the layered oil (15) floating on the (13) surface increases. On the other hand, in the divided portion (14), the reverse phenomenon occurs as the surface of the water-soluble cutting fluid (13) rises. Therefore divided parts
Layered oil (15) floating on the water-soluble cutting fluid (13) surface of (7)
The height of the surface is higher than the height of the layered oil component (16) surface of the divided portion (14). For this reason, if the liquid level of the water-soluble cutting fluid (13) is further raised, the layered oil component (15) in the divided portion (7) will overflow and be removed from the upper edge portion (8) of the side wall (3). Has become. The oil that has overflowed travels along the eaves-shaped portion (9) and accumulates at the tip of the eaves-shaped portion (9). Therefore, the oil is discharged from the valve-equipped opening (10) to the outside and collected in the collection container (17).
The water-soluble cutting fluid (13) from which oil has been removed can be taken out and reused by taking out from the valved outlet (12) slightly above the lower part of the tank (2). Further, a drain discharge cock (12) 'is provided at the bottom of the tank (2).

In the oil removal tank (18) of Example 2, a separation plate (21) having both side edges inscribed is provided obliquely on the inner surface of the side wall (20) of the tank (19), and the tank (1
The inside of 9) is divided into two. However, the separation plate (21) is a tank
Since it is not in contact with the bottom surface (22) of (19), the vicinity of the bottom surface (22) inside the tank (19) is not divided. At the bottom of the tank (19), a valved outlet (23) is provided. As in the case of Example 1, the layered oil component (26) floating on the surface of the water-soluble cutting fluid (25) of the divided portion (24) in the tank (19) is removed from the upper edge portion (27) of the side wall (20). It is designed to overflow and be removed. In the case of the second embodiment, the oil that has overflowed is passed through the eaves-shaped portion (28) as it is and enters the recovery container (29). Further, since the upper end portion (30) of the divided portion (24) is in the open state where it is not covered, the oil overflow condition can be monitored. The water-soluble cutting fluid (25) from which oil has been removed can be taken out from the valved outlet (23) at the bottom of the tank (19) and reused.

Use any of Examples 1 and 2 as long as it is an oil-containing aqueous solution such as oil in a water-soluble cutting fluid used in machine tools, etc. that causes oil to float in layers due to the difference in specific gravity from water. Even so, the oil can be removed and recovered.

Each of Examples 1 and 2 can be used by being installed in the circulation path of the water-soluble cutting fluid which is continuously used while being circulated in a machine tool or the like. Further, in each of Examples 1 and 2, the water-soluble cutting fluid after use can be batch-processed by independently installing them. What kind of usage should be decided by taking into consideration the nature and amount of oil mixed in the water-soluble cutting fluid to be treated, the total treatment amount, and the like. Since the first and second embodiments do not require a power source such as electricity, it is not necessary to place the installation place near a power source, and there is no danger of fire due to electric spark or heat generation due to overload. Further, since there are no consumable parts and the like, maintenance is extremely easy and no maintenance cost is required.

(Effect of the device) The present invention has a simple structure, no power source is required, there is no risk of fire, maintenance is extremely easy, equipment costs and maintenance costs are low, and the structure is simple and inexpensive. Since it can be manufactured and the opening is wide, it is possible to provide a tank for removing oil from an aqueous solution, which has a high degree of freedom in the installation place.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of the first embodiment, and FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 is a partially cutaway sectional view of the second embodiment. (1): Oil removal tank, (2): Tank (3): Side wall, (4): Side edge (5): Separation plate, (6): Bottom surface (7), (14): Divided part, ( 8): Upper edge (9): Eaves, (10): Opening with valve (11): Air vent, (12): Valve outlet (12) ': Drain discharge cock (13): Water soluble Cutting fluid, (15), (16): Layered oil (17): Recovery container, (18): Oil removal tank (19): Tank, (20): Side wall (21): Separation plate, (22): Bottom (23): Valve outlet, (24): Divided part (25): Water-soluble cutting fluid, (26): Layered oil (27): Upper edge, (28): Eaves (29): Collection container, (30): upper end

Claims (1)

[Scope of utility model registration request] 1. A separation plate having both side edges closely attached to an inner surface of a side wall of a tank having a predetermined shape is obliquely attached, an upper part of the inside of the tank is divided into two parts, and a lower part is in a connected state, and is divided by the separation plate. Of the two divided parts inside the same tank, the upper edge of the side wall of the same tank of which the upper part is narrower is projected like an eaves to the outside of the same tank, and the tip of the eaves-shaped part is lowered. An oil removal tank for an oil-containing aqueous solution, characterized in that an upper opening of a divided portion that is widened toward the front is used as an inlet for the oil-containing aqueous solution.