JP2000140504A - Oil/water separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an appropriate drainage pressure for a separated oil by providing a separated oil guide cylinder for draining the separated oil component in such a way that the vertical position of the separated oil guide cylinder is adjustable, in an oil/water separation device with a liquid storage tank in which a waste liquor containing the oil component is separated into the layer of a water-soluble component and the layer of an oil component. SOLUTION: When an oil component contained in a waste liquor is separated, the liquid pressure of a liquid storage tank is adjusted by adjusting the quantity of the waste liquor to be injected into a waste liquor injection cylinder by a waste liquor injection quantity adjustment valve. Next the waste liquor injected into the waste liquor injection cylinder is guided into the liquid storage tank through a waste liquor guide cylinder, the oil component with a low specific gravity being collected at the upper part of the liquid storage tank and water and a water-soluble component with a high specific gravity being collected at the lower part of the liquid storage tank. Consequently, the two separate upper and lower layers, each for the separated oil and the separated water are present. In this case, a separated guide cylinder 32 for guiding the oil of the separated oil layer is provided in such a fashion that the elevation of the outlet of the cylinder 32 is variable. Thus, it is possible to adjust the pressure at the outlet part of the separated oil guide cylinder 32 and maintain the outflow velocity of the separated oil overflowing from the outlet of the separated oil guide cylinder 32 at a correct value.

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 for separating an oil component from a waste liquid containing oil and the like and discharging the separated oil component.

[0002]

2. Description of the Related Art There is known an apparatus for injecting used waste liquid of a coolant used for cutting work of a machine tool into a liquid storage tank and separating an oil component by utilizing a difference in specific gravity between the oil component and water. I have. Since the oil component has a lower specific gravity than water and the water-soluble component, the oil component floats on the surface of the reservoir, and the water and the water-soluble component sink to the bottom of the reservoir and are separated into two layers. . By providing a take-out port at an appropriate position in each layer, the liquid in each layer is taken out and oil-water separation is performed.

FIG. 4 is an explanatory view for explaining the structure of a conventional example of the above oil / water separation device. The used waste liquid is adjusted in the injection amount by a waste liquid injection amount adjusting valve 8, injected from the waste liquid inlet 2, and guided to the storage tank 5 through the waste liquid guide tube 6. Since the specific gravity differs between oil and water contained in the oil in the waste liquid, oil having a low specific gravity collects at the top of the liquid storage tank 5, and water and water-soluble components collect at the bottom of the liquid storage tank 5. The floated oil component overflows and is taken out from the separated oil discharge port 31 by liquid pressure, and water and water-soluble components are accumulated in the water storage portion via the separated water guide tube and discharged from the separated water discharge port. Therefore,
An oil-water separator with a simple mechanism is realized without requiring a drive device for taking out the oil component.

[0004]

By the way, the waste liquid to be separated from oil and water is not always one type, and various waste liquids are subject to treatment. The oil component contained in the waste liquid has specific gravity and viscosity. Etc. are often different. When the wastewater is subjected to oil / water separation processing by the above oil / water separator, a phenomenon occurs in which the outflow speed of the separated oil overflowing from the oil outlet 31 varies depending on the specific gravity and viscosity of the oil component of the waste liquid. For example, in the case of a separation oil having a large specific gravity and a high viscosity, the overflow speed of overflow is slow,
Conversely, in the case of a separated oil having a low specific gravity and a low viscosity, the outflow speed at which the oil overflows becomes high. Therefore, the characteristics of the oil component and the storage tank 5
Depending on the relationship with the internal pressure, the separated oil may be rapidly discharged, and the separated oil may be discharged to the water below the oil reservoir. As a result, water and a water-soluble component are contained in the separated oil, and there is a problem that the purpose of separating only the oil component cannot be achieved.

[0005]

An oil-water separator according to the present invention is an oil-water separator for collecting a waste liquid containing an oil component in a storage layer and separating the waste liquid into a layer of an oil component and a layer of a water-soluble component. A separated oil guide tube for discharging the separated oil component is provided, and the vertical position of the separated oil guide tube is provided so as to be adjustable.

Further, the oil-water separation device of the present invention is characterized in that a ball is disposed at an outlet of the separated oil guide cylinder so as to be vertically movable.

Further, the oil-water separator of the present invention is characterized in that the balls use balls having different weights according to the oil component contained in the waste liquid.

[0008]

In an oil / water separator that discharges separated oil separated in a liquid storage tank by hydraulic pressure, the flow rate of discharged oil varies depending on the specific gravity and viscosity of the separated oil. As a result, the specific gravity of the discharged oil is reduced. Depending on the viscosity, it may be discharged to the water layer below the oil layer, but in the present invention, the height of the separated oil discharge port is adjusted according to the characteristics of the separated oil, so that the discharged liquid is adjusted. Can be finely adjusted, and the oil can be stably discharged when separating oil having various characteristics.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. Needless to say, the present invention is not limited to this.

[0010] The oil-water separator 1 according to the embodiment of the present invention comprises:
A waste liquid injection cylinder 2 is provided at one end of the liquid storage tank 5, a separated water discharge unit 4 is provided at the other end, and a separated oil discharge unit 3 for discharging separated oil components is provided at the center. Is provided.

A waste liquid guide cylinder 6 is connected to the bottom of the waste liquid injection cylinder 2. The waste liquid introduced from the waste liquid injection cylinder 2 is guided to the bottom of the storage tank 5 through the waste liquid guide cylinder 6. The cylinder 6 is arranged. Further, a separated water guide tube 7 is provided at the center of the bottom of the separated water discharge unit 4, and one open end is at the bottom of the liquid storage tank 5 and the other open end is inside the separated water discharge unit 4. Be placed. Further, the separated water discharge section 4 is provided with a separated water discharge port 41 for discharging the separated water.

FIG. 2 shows the details of the separated oil discharge section 3 of the first embodiment. The separated oil discharge unit 3 is disposed at the upper center of the liquid storage tank 5 via a separated oil guide 9 configured such that the upper end is smaller than the lower end. Separated oil guide cylinder receiving stand 3 provided with separated oil guide cylinder 32 at the bottom of separated oil discharge section 3
The separation oil passes through a hollow portion 37 provided at the center of the separation oil guide cylinder 32 and is guided to the separation oil reservoir 36. In FIG. 2, the height adjustment mechanism is a mechanism for adjusting the height by providing a screw mechanism between the separation oil guide cylinder 32 and the separation oil guide cylinder receiving base 33. Cylinder 32
Moves up and down. In this embodiment, a screw mechanism is used as the vertical mechanism of the separation oil guide cylinder 32, but the invention is not limited to this.

The process of separating the oil component in the waste liquid will be described. The amount of waste liquid to be injected into the waste liquid injection cylinder 2 is adjusted by the waste liquid injection amount adjusting valve 8, whereby the liquid pressure in the storage tank 5 is adjusted. The waste liquid injected into the waste liquid injection cylinder 2 is guided to the liquid storage tank 5 through the waste liquid guide cylinder 6, and the oil component having a low specific gravity is collected at the upper part of the liquid storage tank 5, and the water and the water-soluble component having a high specific gravity are stored in the liquid storage tank 5. As a result of collecting at the lower part of the tank 5, it is separated into upper and lower two layers of a layer of separated oil and a layer of separated water. The separated water receives the liquid pressure inside the storage tank 5, is guided to the separated water reservoir 42 through the separated water guide tube 7, and is discharged from the separated water discharge port 41.

The separated oil is pushed up by the liquid pressure in the liquid storage tank 5 and overflows through the separated oil guide cylinder 32 to the separated oil reservoir 36, but passes through the separated oil guide cylinder 32 due to the specific gravity and viscosity of the oil component. In this case, the outflow speed of the separated oil that is pushed up differs depending on the oil component contained in the waste liquid injected into the liquid storage tank 5.

In the first embodiment of the present invention, since the separation oil guide cylinder 32 for guiding the oil in the separation oil layer is provided and the outlet height of the separation oil guide cylinder is made variable, the separation oil guide cylinder 32 is provided. , The pressure at the outlet of the separated oil guide cylinder 32 can be adjusted. As a result, it is possible to appropriately maintain the outflow speed at which the separated oil overflows from the outlet of the separated oil guide cylinder 32, and to stably discharge the separated oil corresponding to the waste liquid containing various oil components. Can be. Therefore, unlike the conventional oil-water separator, there is no problem that the separated oil overflows excessively or suddenly blows out, and the separated water is mixed.

In the second embodiment, as shown in FIG. 3, a ball guide member 35 is detachably attached to the upper end of the separation oil guide cylinder 32, and a ball 34 is disposed in the ball guide member 35. The ball guide member 35 is formed in such a structure that the ball 34 can move up and down inside the ball guide member 35 and fits into the outlet of the separated oil guide cylinder 32 when the ball moves downward. In addition, a chamfer may be provided at the upper end of the hollow portion of the separation oil guide tube 32 so that the ball can easily fit into the outlet of the separation oil guide tube 32. The balls 34 arranged at the outlet of the separated oil guide cylinder 32 configured as described above provide resistance when the separated oil overflows from the outlet of the separated oil guide cylinder 32. By appropriately selecting the weight of the ball 34, the resistance of the separated oil when it overflows from the outlet of the separated oil guide tube 32 can be changed. Therefore, the outflow speed of the separated oil can be adjusted by adjusting the outflow speed of the separated oil. Performs the function of stabilizing That is, by using the load by the weight of the ball at the separation oil outlet together with the pressure adjustment function by adjusting the height of the separation oil guide cylinder 32, it is possible to more precisely adjust the outflow amount of the separation oil.

Since the ball guide member 35 is detachable, if the characteristics of the oil component contained in the waste liquid can be known in advance, a ball having a weight corresponding to the specific gravity and viscosity of the oil component can be used. Well, even if the characteristics of the oil component contained in the waste liquid cannot be known in advance, it is necessary to check the actual operating condition and replace the ball with an appropriate weight to determine the appropriate separation oil discharge conditions. Obtainable.

As described above, according to the present invention, it is difficult to perform conventional control by adjusting the vertical position of the separation oil guide cylinder 32 and arranging a ball at the outlet of the separation oil guide cylinder 32. It is possible to easily and accurately adjust the outflow speed of the separated oil, and it is possible to maintain a stable discharged state of the separated oil that is not affected by the characteristics of the oil component contained in the waste liquid. .

[0019]

According to the conventional oil-water separator, in which the hydraulic pressure is used for discharging the separated oil, the specific gravity and the viscosity vary depending on the components of the oil, and the amount of the oil component flowing out when the oil is discharged is controlled. However, there is a problem that water and water-soluble components are mixed. In the oil-water separator of the present invention, the height of the outlet of the separated oil can be adjusted and an appropriate discharge pressure of the separated oil can be obtained, so that water and water-soluble components are mixed into the separated oil. No defects.

[Brief description of the drawings]

FIG. 1 is an overall view showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a main part of the first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a main part of a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil-water separation apparatus 2 Waste liquid injection cylinder 3 Separated oil discharge part 4 Separated water discharge part 5 Reservoir 6 Waste liquid guide cylinder 7 Separated water guide cylinder 8 Waste liquid injection amount control valve 9 Separated oil guide part 31 Separated oil discharge port 32 Separated oil Guide cylinder 33 Separated oil guide cylinder receiver 34 Ball 35 Ball guide member 36 Separated oil reservoir 37 Hollow part 41 Separated water outlet 42 Separated water reservoir

Claims (3)

[Claims] 1. An oil-water separator for collecting waste liquid containing an oil component in a storage layer and separating the waste liquid into a layer of an oil component and a layer of a water-soluble component, wherein the separated oil is for discharging the separated oil component. An oil-water separation device comprising a guide cylinder, wherein the vertical position of the separated oil guide cylinder is adjustable. 2. The oil / water separator according to claim 1, wherein a ball is disposed at an outlet of the separated oil guide cylinder so as to be vertically movable. 3. The oil / water separator according to claim 2, wherein the balls use different weights depending on the oil component contained in the waste liquid.