JP2936090B2 - Water-soluble oil recovery device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering a water-soluble oil agent for sorting waste liquid stored in a storage tank into reusable high quality oil and impure oil to be discarded.

[0002]

2. Description of the Related Art In a factory, a water-soluble cutting fluid, which is a water-soluble oil agent, is generally used for various processing operations. Normally, this type of cutting fluid deteriorates with use, and therefore, an operation of replacing the cutting fluid with new cutting fluid is performed at a predetermined time.

[0003]

However, in practice, since a large amount of cutting fluid is required in a factory, the method of periodically replacing the cutting fluid increases the cost of treating waste fluid and increases the cost of cutting fluid. The amount of used will be enormous. In addition, the waste liquid contains a solid component that is an impure oil and a reusable high-quality oil, which is discarded together with the impure oil. .

The present invention is intended to solve this kind of problem, and it is possible to easily and reliably take out reusable high-quality oil from waste liquid, and to efficiently use an oil agent. It is an object of the present invention to provide a water-soluble oil recovery device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a waste liquid storage tank in which a used water-soluble oil agent is stored as a waste liquid, and a method for discharging the waste liquid from the waste liquid storage tank. A pump and a waste liquid distribution mechanism that detects the concentration of the waste liquid fed from the waste liquid storage tank and distributes the waste liquid to reusable high quality oil and impure oil to be discarded based on the detected concentration. , Is provided.

[0006]

In the water-soluble oil recovery apparatus according to the present invention, the waste liquid in the waste liquid storage tank is sent to the waste liquid distribution mechanism under the action of the pump. In this waste liquid distribution mechanism, the concentration of the waste liquid is detected, and based on the detection result, the waste liquid is distributed between high quality reusable oil and impure oil to be discarded. Therefore, the high-quality oil distributed from the waste liquid is reused as the oil agent, so that the oil agent can be efficiently used, and the amount of the waste liquid to be discarded and the amount of the used oil agent can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water-soluble oil recovery apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a recovery apparatus according to this embodiment. The recovery device 10 includes a waste liquid storage tank 14 in which a used water-soluble cutting fluid (oil agent) 12 is stored as a waste liquid, and an intermediate waste liquid storage in which the cutting liquid 12 in the waste liquid storage tank 14 is supplied via a pump 15. A tank 16 and the concentration of the cutting fluid 12 sent from the intermediate waste liquid storage tank 16 via the pump 15 are detected. Based on the detected concentration, the high-quality oil 12a capable of reusing the cutting fluid 12 and discarded. And a waste liquid distribution mechanism 18 for distributing the waste liquid to the impure oil 12b.

A sampling member 20 is disposed in the waste liquid storage tank 14 in a floating state with respect to the cutting fluid 12 stored therein, and the sampling member 20 is connected to a pump 15 via a first pipe 22. Communicate with The first in the middle of the first pipeline 22
A valve 26 is provided, and the first valve 26
Are connected to the cleaning pipe 28 and the take-out pipe 30 via a second valve 32 and a third valve 34, respectively. The cleaning conduit 28 communicates with an unillustrated industrial water supply source, and the removal conduit 30 communicates with the lower side of the intermediate waste liquid storage tank 16.

The pump 15 is disposed in the oil receiving tray 36 together with the intermediate waste liquid storage tank 16, and a second pipe 38 and a third pipe 40 communicate with the outlet side thereof. Second conduit 38
Communicates with the upper side of the intermediate waste liquid storage tank 16 while the third
The conduit 40 is opened into the waste liquid storage tank 14,
On the way, the fourth conduit 42 branches off.

A fourth valve 44 and a fifth valve 46 are provided in the second line 38, the third line 40, and the fourth line 42, respectively.
And a sixth valve 48 are provided. One end of an overflow pipe 50 communicates with the third conduit 40, and the other end of the overflow pipe 50 is opened to the upper side of the intermediate waste liquid storage tank 16.

The waste liquid distribution mechanism 18 includes a concentration meter (for example, a digital PH controller) 52, and a fourth conduit 42 is connected to an introduction side of the concentration meter 52. A fifth conduit 58 and a sixth conduit 60 are connected to the outlet of the concentration meter 52 via a seventh valve 54 and an eighth valve 56, respectively. The fifth pipe 58 communicates with the upper part of the high-quality oil storage tank 62, and the sixth pipe 60 communicates with the upper part of the impure oil storage tank 64. Discharge valves 66 and 68 are provided below the high-quality oil storage tank 62 and the impure oil storage tank 64, respectively.
The high-quality oil storage tank 62
Is installed in the recycling line 70 with the impure oil storage tank 64.
Communicate with the disposal pipeline 72, respectively.

The operation of the recovery apparatus 10 configured as described above will be described below.

The cutting fluid 12 used in a processing machine (not shown) is stored in a waste fluid storage tank 14 as waste fluid. Then, in order to supply the cutting liquid 12 from the waste liquid storage tank 14 to the intermediate waste liquid storage tank 16, as shown in FIG.
First, the first and fourth valves 26 and 44 are opened, while the second valve 32, the third valve 34, and the fifth valve 46 are opened.
And the sixth valve 48 is closed. When the pump 15 is driven in this state, the cutting fluid 12 in the waste fluid storage tank 14 is
Is sucked from the sampling member 20, is introduced into the pump 15 through the first pipe 22, and is then drawn out from the second pipe 38 to the upper side of the intermediate waste liquid storage tank 16.

When the cutting fluid 12 is supplied into the intermediate waste liquid storage tank 16, solid components (impure oil) float in the intermediate waste liquid storage tank 16, and high-quality oil precipitates and separates. Therefore, as shown in FIG. 3, the first valve 26, the second valve 3
2, the fourth valve 44 and the fifth valve 46 are closed, while the third valve 34, the sixth valve 48, the seventh valve 5
With the fourth and eighth valves 56 open, the pump 1
5 is driven.

For this reason, the cutting fluid 12 is removed from the lower side of the intermediate waste fluid storage tank 16 through a pumping line 30 through the pumping line 30.
5 and is further introduced from a fourth conduit 42 into a concentration meter 52 constituting the waste liquid distribution mechanism 18. In FIG.
The relationship between the scale of the densitometer 52 and the dilution ratio is shown,
By multiplying the scale of this densitometer by 0.83, the concentration (%) of the cutting fluid 12 can be obtained.

Based on the detected concentration of the cutting fluid 12 introduced into the concentration meter 52, the cutting fluid 12 is divided into a reusable high-quality oil 12a and an impure oil 12b to be discarded. When the cutting fluid 12 is determined to be the high quality oil 12a, it is stored in the high quality oil storage tank 62 from the concentration meter 52 through the fifth pipe 58, and when the cutting fluid 12 is determined to be the impure oil 12b, the concentration is determined. From the total 52, it is introduced into the impure oil storage tank 64 via the sixth conduit 60.

High quality oil 12a in the high quality oil storage tank 62
When the discharge valve 66 is opened, the waste oil is reused through the recycling pipe 70. On the other hand, when the discharge valve 68 is opened, the impurity oil 12b in the impure oil storage tank 64 is discharged. It is supplied to the road 72 and incinerated at a treatment plant, for example.

In this case, in this embodiment, the waste liquid storage tank 14
After the used cutting fluid 12 stored therein is once stored in the intermediate waste fluid storage tank 16, it is introduced into the waste fluid distribution mechanism 18 under the action of the pump 15, and the quality of the high quality oil 12 a depends on the concentration of the cutting fluid 12. And the impure oil 12b. Then, the high quality oil 12a is reused as the cutting fluid 12.

For this reason, the cutting fluid 12 can be used more efficiently as compared with the conventional one in which all of the used cutting fluid 12 stored in the waste fluid storage tank 14 is discarded and only the new cutting fluid 12 is used. Can be. In addition, the amount of the impure oil 12b that is actually stored in the impure oil storage tank 64 and incinerated is reduced at once, and the total amount of the cutting fluid 12 used for various machining operations is significantly reduced. . Therefore, the waste liquid treatment cost and the cost of the entire cutting fluid 12 are reduced, and the effect of being economical is obtained.

When cleaning the inside of the high-quality oil storage tank 62, the third valve 34, the fourth valve 44, the fifth valve 46, and the eighth valve 56 are closed while the first valve is closed.
With the valve 26, the second valve 32, the sixth valve 48, and the seventh valve 54 opened, the pump 15 is rotated. As a result, industrial water is supplied from a not-shown industrial water supply source via the cleaning pipe 28, and this industrial water is supplied to the first pipe 22, the pump 15, the fourth pipe 42 and the fifth pipe 42.
The oil is supplied into the high-quality oil storage tank 62 through the pipe 58,
The cleaning operation of the high quality oil storage tank 62 is performed.

The overflow pipe 50 is connected to the intermediate waste liquid storage tank 16, and the cutting fluid 12 corresponding to the overflow can be returned to the waste liquid storage tank 14. In addition, even when the cutting fluid 12 leaks from the intermediate waste liquid storage tank 16, the oil receiving tray 36 can prevent the cutting fluid 12 from flowing out unnecessarily.

In the present embodiment, the cutting fluid 12 has been described as the water-soluble oil. However, it is needless to say that the present invention can be applied to other water-soluble oils such as cooling oil. Furthermore, cutting fluid 1
Waste liquid storage layer 14 and intermediate waste liquid storage tank 1 for storing
6, the cutting fluid 12 can be directly supplied from the waste liquid storage tank 14 to the concentration meter 52 without using the intermediate waste liquid storage tank 16.

[0024]

According to the water-soluble oil agent recovery apparatus of the present invention, the following effects and advantages can be obtained.

The waste liquid in the waste liquid storage tank is divided into high quality oil and impure oil via a waste liquid distribution mechanism, and the high quality oil is reused as an oil agent. Therefore, the oil agent can be used efficiently, and the amount of waste liquid to be discarded and the total amount of the oil agent used can be reduced. Thereby, the waste liquid treatment cost and the oil agent cost are reduced at once.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a water-soluble oil agent recovery device according to the present invention.

FIG. 2 is an explanatory diagram of an operation when the cutting fluid is supplied from the waste liquid storage tank to the intermediate waste liquid storage tank in the recovery device.

FIG. 3 is an explanatory diagram when the cutting liquid is supplied from the intermediate waste liquid storage tank to a waste liquid distribution mechanism in the recovery device.

FIG. 4 is a relationship diagram between a scale and a dilution ratio in a densitometer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Recovery apparatus 12 ... Cutting fluid 12a ... High quality oil 12b ... Impure oil 14 ... Waste liquid storage tank 15 ... Pump 16 ... Intermediate waste liquid storage tank 18 ... Waste liquid distribution mechanism 22, 30, 38, 40, 42, 58, 60 ... Pipe Roads 26, 32, 34, 44, 46, 48, 54, 56: Valve 62: High-quality oil storage tank 64: Impure oil storage tank

Claims (1)

(57) [Claims] 1. A waste liquid storage tank in which a used water-soluble oil agent is stored as a waste liquid, a pump for sending out the waste liquid from the waste liquid storage tank, and a concentration of the waste liquid supplied from the waste liquid storage tank. And a waste liquid sorting mechanism that sorts the waste liquid into reusable high quality oil and impure oil to be discarded based on the detected concentration.