JP2000070606A - Method and apparatus for recycling water soluble oiling agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the service life of a water soluble oiling agent by recycling the agent and to reduce the amount of waste liquid. SOLUTION: An inlet 12 and an outlet 13 are formed in the lower part of a treatment tank 1 in which a separation accelerator is added into a water soluble oiling agent to separate oil components. The oiling agent is sent from use system 4 which uses the agent to the inlet 12. In a treatment layer, the accelerator is added, the oil components, which are floated upward, are separated from the oiling agent. The separated oiling agent is returned from the outlet 13 to the use system 4. From the inlet 12 positioned below the separated oil components left in the treatment tank 1, a new water soluble oiling agent in the use system 4 is supplied into the treatment tank 1. The separated oil components raised with the elevation of a liquid level by the supply are discharged from an oil component discharge opening 11 formed in the upper part of the treatment tank 1, the separation accelerator is added after the discharge, the separation operation is repeated, and the oiling agent is recycled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for recycling a water-soluble oil agent.

[0002]

2. Description of the Related Art Conventionally, a water-soluble oil agent has been used as a cutting fluid used for cutting or grinding cast iron or steel, or a cleaning fluid for processing products such as honing. This water-soluble oil agent contains another oil component mixed in the water-soluble oil agent with the progress of the use period in an emulsion state, regardless of whether it is alkaline or neutral. When the content of the emulsion reaches a certain level or more, the oil content and suspended substances of the water-soluble oil agent increase, and various deterioration phenomena occur. It is necessary to dispose of the water-soluble oil agent that has caused such a deterioration phenomenon as a waste liquid and replace it with a new water-soluble oil agent. The replacement of the water-soluble oil agent is usually carried out every one to three months, depending on the use conditions, and each time, the deteriorated water-soluble oil agent is discarded as waste liquid.

[0003]

SUMMARY OF THE INVENTION In view of the above circumstances, the invention of the present application aims to extend the usable period of a water-soluble oil agent by regenerating the water-soluble oil agent, extend the service life of the water-soluble oil agent, and increase the waste liquid. It is an object of the present invention to provide a water-soluble oil recycle processing system capable of reducing the amount.

[0004]

Therefore, the first invention of the present application is to transfer at least a part of a water-soluble oil from a use system using a water-soluble oil to a processing system such as a treatment tank and mix it with the water-soluble oil. The treatment of a water-soluble oil agent, wherein the separated oil is separated and recovered by a separation accelerator, and the water-soluble oil agent after separating the oil component is returned to a system using a water-soluble oil agent, thereby recycling the water-soluble oil agent. The problem is solved by providing a method. By this method, other oil components and suspended substances contained in the water-soluble oil agent in an emulsion state are removed, the deterioration phenomenon is eliminated, and the life of the water-soluble oil agent can be extended. Moreover, since only the recovered oil is discarded, the amount of waste liquid can be reduced.

The second invention of the present application comprises a treatment tank for adding a separation accelerator to a water-soluble oil agent to separate oil, an inlet and an outlet provided below the treatment tank, Outgoing path for sending the water-soluble oil from the system using the water-soluble oil to the inlet, and an outlet provided below the treatment tank with the water-soluble oil separated from the oil while floating upward by the action of the separation accelerator The return path returning to the use system connects the use system and the processing tank, and the above-mentioned inlet is provided below the separated oil remaining in the processing tank, and new water-soluble Provided is a water-soluble oil treatment apparatus, characterized in that an oil outlet for discharging the separated oil, which has risen with the rise of the liquid level by the oil, to the outside of the processing tank is provided at the upper part of the processing tank. In the processing apparatus according to the second aspect of the present invention, the water-soluble oil agent flows from the system using the water-soluble oil agent through the outward path, and enters the processing tank from the inlet. In the treatment tank, a separation accelerator is added to separate the oil, but the separated oil floats on the liquid surface of the water-soluble oil. Therefore, only the water-soluble oil agent can be caused to flow out by causing the liquid in the processing tank to flow out from the lower outlet of the processing tank and stopping the flow before the separated oil reaches the lower outlet. The water-soluble oil agent after the separation is returned to the use system from the return path. Then, by introducing a new water-soluble oil agent from the use system through the outward path and into the processing tank from the inlet below the processing tank, the remaining separated oil is placed on the liquid surface of the new water-soluble oil agent. It rises in a floating state. When this rise reaches the oil outlet provided at the upper part of the processing tank, the separated oil is discharged from the oil outlet to the outside of the processing tank.

A third invention of the present application is directed to the water-soluble oil treatment apparatus according to the second invention, wherein the water-soluble oil added with the separation accelerator is caused to flow out of the outlet and returned to the inlet. A circulation path for circulating the water-soluble oil agent is provided, and the circulation path and the fluid in the outward path and the return path are transferred by one pump connected via a valve. I will provide a. In the processing apparatus according to the second aspect of the present invention, since the circulation path for circulating the water-soluble oil is provided, the separation accelerator diffuses into the water-soluble oil during the circulation, and the separation of the oil component is performed smoothly. Will be Then, the fluid in the circulation path, the above-mentioned outward path, and the return path is transferred by one pump connected via a valve.
Manufacturing costs and operating costs can be reduced.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram of an apparatus for treating a water-soluble oil agent according to an embodiment of the present invention, FIG. 2 is a front view of the apparatus, and FIG. 3 is a side view of the apparatus.

This processing apparatus uses a water-soluble oil agent such as a metal processing apparatus or a cleaning apparatus (hereinafter, referred to as a use system 4).
To recycle the water-soluble oil agent, and includes one treatment tank 1, one pump 2, and first to fourth on-off valves 31, 32, 33, and 34.

The processing tank 1 has an oil discharge port 11 at an upper part, and an inlet 12 and an outlet 13 at a lower part. Inside the processing tank 1, two upper sensors 14 and lower sensors 15 are provided.
Two liquid level sensing means are arranged. Upper sensor 14
Is to detect that the level of the water-soluble oil agent has risen to just below the oil discharge port 11, and the lower sensor 15
It senses that the level of the water-soluble oil agent has dropped to just above the outlet 13. As a specific example, the one shown in FIG. 4 can be exemplified. The structure of the upper sensor 14 and the lower sensor 15 may be different from each other, but the same structure may be used. That is, each sensor 1
Nos. 4 and 15 detect the liquid level of the water-soluble oil agent by detecting the position of the float 52 having a lower specific gravity than the water-soluble oil agent a and a higher specific gravity than the separated oil agent b. Specifically, it includes a float 52 supported slidably up and down by a guide 51, a movable terminal 53 arranged in the guide 51, and a fixed terminal 54. A magnet 55 is arranged on the float 52, and a magnet 56 attracted by the magnet 55 is provided on the movable terminal 53. Then, the float 52 moves up and down the liquid surface,
When approaching the terminal, the magnets 55 and 56 are attracted to each other, and the movable terminal 53 moves to contact and energize the fixed terminal 54, thereby detecting the position of the float 52.

Returning to FIG. 1, the description will be continued. At an appropriate position of the processing tank 1, an inlet 16 for a separation accelerator is provided, and this inlet is connected to a storage portion 17 for the separation accelerator. . The separation accelerator may be introduced from the storage section 17 by natural fall, or may be forcibly introduced by a pump or the like.

The processing tank 1, the pump 2, and the use system 4 are connected by three routes: a forward route, a return route, and a circulation route.
Each path may be implemented as an independent path. However, in this embodiment, since each path is transferred by one pump 2, the paths share some paths with each other. I have.

The respective routes will be described in detail. The outward route is defined as follows: an inflow port 41 of a processing tank 1 is connected via a pump 2 to an inflow port 41 of a usage system such as a tank using a water-soluble oil agent.
This is the path leading to 2. A first on-off valve 31 is interposed between the use system outlet 41 and the pump 2, and a second on-off valve 32 is interposed between the pump 2 and the inlet 12. A strainer 36 is interposed between the use system outlet 41 and the first on-off valve 31. The filter 35 is for removing relatively large impurities, dust and the like in the water-soluble oil agent and protecting the pump 2 and the first on-off valve 31. However, the filter 35 can be implemented without providing the filter. is there.

The return path is from the outlet 13 of the processing tank 1 via the pump 2 to the inlet 42 of a working system such as a tank of the working system 4.
It is a route to reach. A third on-off valve 33 is interposed between the outlet 13 and the pump 2, and a fourth on-off valve 34 and a filter 35 are interposed between the pump 2 and the use system inlet 42. The filter 35 is for removing suspended matters and the like in the water-soluble oil agent, but may be implemented without providing a filter.

The circulation path is a path from the outlet 13 of the processing tank 1 to the inlet 12 of the processing tank 1 via the pump 2. A third on-off valve 33 is interposed between the outflow port 13 and the pump 2, and a second on-off valve 32 is interposed between the pump 2 and the inflow port 12.

As is apparent from the above description, the circulation path shares the same path as the return path from the outlet 13 of the processing tank 1 to the pump 2, and the circulation path from the pump 2 to the inlet 1 of the processing tank 1.
Up to 2, the route is shared with the outbound route. Further, the first open / close valve 31 and the third open / close valve 33 form a merged path from the pump 2 to the pump 2, and the pump 2 merges from the second open / close valve 32 to the fourth open / close valve 34. Make up the route.

Next, processing steps performed by the above processing apparatus will be described. First step The water-soluble oil is sent from the use system 4 to the processing tank 1.
Specifically, the first and second on-off valves 31 and 32 are opened, and the third and fourth on-off valves 33 and 34 are closed. The pump 2 is operated, and the water-soluble oil agent is sent from the use system outlet 41 of the use system 4 to the inlet 12 of the treatment tank 1 on the outward path.

Second Step With the processing tank 1 filled,
Stop feeding the water-soluble oil. Specifically, when the upper sensor 14 senses the liquid level of the water-soluble oil, the pump 2 stops, and the liquid level stops rising before the water-soluble oil flows out of the oil outlet 11. .

Third step The emulsified oil is separated from the water-soluble oil agent. Specifically, the separation accelerator is supplied in a fixed amount from the storage section 17, and the water-soluble oil agent is circulated. The circulation opens the second and third on-off valves 32, 33 and closes the first and fourth on-off valves 31, 34. The pump 2 is operated, and the water-soluble oil is returned from the outlet 13 to the inlet 12 via the pump 2 by the circulation path. By this circulation, the separation accelerator is diffused, and the water-soluble oil is stirred. Of course, without this circulation,
Oil separation is possible, but it is more advantageous to circulate to improve the separation efficiency. Further, instead of or together with the circulation, a stirring blade or the like may be provided in the processing tank 1 to perform stirring in the processing tank. In addition, it is more advantageous to separate the oil component by repeatedly performing the operation and the stoppage of the circulation. The number and time of the circulation and the rest can be automatically controlled by control means such as a timer. The use of a metering pump is advantageous in that the metering pump can be used to feed the separation accelerator, and the amount of the metering pump can be easily changed by adjusting the discharge amount of the metering pump.

Fourth Step The purified water-soluble oil agent is returned to the use system 4. Specifically, the third and fourth on-off valves 33, 3
4 is opened, and the first and second on-off valves 31 and 32 are closed. The pump 2 is operated, and the water-soluble oil from which oil has been separated is returned from the outlet 13 to the use system inlet 4 of the use system 4 by the return path.
Return to 2. At this time, since the separated oil having a small specific gravity is floating on the water-soluble oil, it is allowed to flow out of the outlet 13 provided at the lower part of the processing tank 1 to return only the water-soluble oil to the use system 4. be able to.

Fifth Step Before the separated oil flows out, the feeding of the water-soluble oil agent is stopped. Specifically, the lower sensor 1
5 detects the level of the water-soluble oil agent,
Is stopped, and before the separated oil component floating on the water-soluble oil agent flows out from the outflow port 13, the lowering of the liquid level stops.

Sixth Step A new water-soluble oil agent is sent from the use system 4 to the treatment tank 1. Specifically, the first and second on-off valves 3
1 and 32 are opened, and the third and fourth on-off valves 33 and 34 are closed. The pump 2 is operated, and the water-soluble oil agent is sent from the use system outlet 41 of the use system 4 to the inlet 12 of the treatment tank 1 on the outward path. The inflow port 12 is provided below the position of the separated oil in the previous step, and the liquid level in the processing tank 1 rises without mixing with the separated oil.

Seventh step The separated oil is discharged. Specifically, when the upper sensor 14 detects the liquid level of the water-soluble oil, the pump 2 stops, and when the water-soluble oil has risen to just below the oil discharge port 11, the liquid level stops rising. Things. That is, as the water-soluble oil rises to this stage, the separated oil floating in the water-soluble oil flows out of the position of the oil discharge port 11 and becomes the oil reservoir 18.
It is stored in.

Step Repetition At the end of the seventh step, the state is the same as that at the end of the second step. Thereafter, the third to seventh steps are repeated to obtain the water-soluble Purification of the oil agent is performed. still,
The repetition of this step may be changed depending on the total amount and type of the water-soluble oil agent of the used system to be treated, the degree of contamination, and the like.
It is also possible to set the number of repetitions and stop after automatically repeating the predetermined number of times.

According to the above-described treatment method, only the separated oil described above needs to be discarded, and the waste liquid is greatly reduced as compared with the conventional case where the entire water-soluble oil is treated as a waste liquid. The processing amount could be reduced. By performing this treatment every 1 to 3 months, the usable period of the water-soluble oil agent is increased by 1 to 3 months from the conventional 1 to 3 months.
It extends for more than two months and plays a major role in extending the life. Moreover, according to this treatment method, especially when the oil component is separated from the water-soluble oil agent and floats by circulating or stirring, the suspended matter in the liquid also coagulates and floats, so that together with the oil component, Recovery of suspended material is also performed.

The above steps can be controlled by a sequencer, a microcomputer, or the like, and each step can be automatically repeated. Therefore, in use, all processes can be performed automatically simply by connecting the respective paths and turning on the main switch. In particular, routes other than the used system are shown in FIGS.
In this case, the connection of each path is completed only by connecting the use system outflow port 41 and the use system inflow port 42 to a connection portion (not shown) of the apparatus by using a hose or the like. In addition, since full-automatic processing is possible as described above, when the use system is not moving, such as on a holiday, by performing this recycling processing, the water-soluble oil Can be purified. Further, it is also possible to perform the above-mentioned purification treatment while using the used system in a processing operation or the like.

Examples of the water-soluble oil agent to be subjected to the recycling treatment method according to the present invention include a chemical solution type water-soluble oil agent and a synthetic type water-soluble oil agent mainly containing an alkanolamine salt of a fatty acid.
Examples of the separation accelerator used herein include those containing alkyltrimethylammonium chloride as a main component, but are not limited thereto, and the addition of the separation accelerator causes the oil component mixed in the water-soluble oil agent to aggregate. Any combination of a water-soluble oil agent and a separation accelerator that can be floated can be an object of using the recycling method and the processing apparatus of the present application.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments will be described in order to enhance understanding of the present invention, but the present invention should not be understood as being limited to these embodiments.

Example 1 A cylinder block (E
/ F) KS-2 used for washing machine after honing
1 (a chemical solution-type water-soluble oil agent mainly composed of an alkanolamine salt of a fatty acid manufactured by Shimada Kasei Co., Ltd.). As the separation accelerator, a separation accelerator prepared by Shimada Kasei Co., Ltd. containing alkyltrimethylammonium chloride as a main component is used. The processing steps are the first to seventh steps described in the above embodiment. The use system 4 was the washing tank (3000 liters) of the above washing machine. The processing time of each process is from the first process to the second process.
The process was for 14 minutes. The third step was for 62 minutes. The details of the third step were as follows: circulating for 20 minutes while supplying the separation accelerator (200 ml), allowing the mixture to stand still for 11 minutes, then circulating for 20 minutes, and resting again for 11 minutes. Then, the fourth to fifth steps were performed for 14 minutes. The sixth step and the seventh step correspond to the first step and the second step.
The processing time of one batch was 90 minutes, and the processing volume of one batch in the processing tank 1 was 215 liters. This was performed for a total of 16 passes for 24 hours, and a total of 3440 liters of processing were completed. The results of this process are shown in Table 1 below.

[0029]

[Table 1]

Example 2 As a target of the recycling treatment, KS-21 (a chemical solution type water-soluble oil agent mainly containing an alkanolamine salt of a fatty acid manufactured by Shimada Kasei Co., Ltd.) used in a washer after cylinder block honing. ) Was carried out under the same conditions as in Example 1 except that ()) was used. Table 2 shows the results.

[0031]

[Table 2]

As is clear from the above embodiments, the present invention can remove oil and suspended substances at a high rate, and can recycle a water-soluble oil agent which has conventionally been disposed of by waste liquid. At the same time, what is to be disposed of as waste liquid is only the recovered separated oil, and a large reduction in the amount of waste liquid has been realized. The invention of the present application is, in addition to the above embodiments,
It can also be implemented as other forms, for example, instead of the upper and lower sensors using a float, it can be implemented instead of other forms of sensors such as infrared,
Instead of the sensor, the timer stops the separated oil before it flows out of the outlet 13 and before the separated oil is discharged from the oil outlet 11 and before the water-soluble oil is discharged. The outflow may be stopped at that time. Further, the sensor and the timer may be used in combination, and the control by the timer may be performed as a safety device when the sensor does not operate sufficiently.

[0033]

According to the first aspect of the present invention, the water-soluble oil agent is regenerated, thereby extending the usable period of the water-soluble oil agent, extending its life, and reducing the amount of waste liquid. Thus, a method of recycling a water-soluble oil agent that can be provided.

According to the second and third aspects of the present invention, by regenerating a water-soluble oil, the usable period of the water-soluble oil can be extended, the life thereof can be extended, and the amount of waste liquid can be reduced. Thus, it is possible to provide a water-soluble oil recycle processing apparatus that can perform the above-described processing. In particular,
In the third device, not only the separation process can be performed promptly by the circulation action, but also when the oil component separates from the water-soluble oil agent and floats, the suspended matter in the liquid also coagulates and floats, The effect of promoting the recovery of the suspended substance together with the oil is exhibited.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an apparatus for treating a water-soluble oil agent according to an embodiment of the present invention.

FIG. 2 is a front view of the same device.

FIG. 3 is a side view of the same device.

FIG. 4 is an explanatory diagram of upper and lower sensors.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing tank 2 Pump 4 Use system 11 Oil discharge port 11 12 Inlet 13 Outlet 14 Upper sensor 15 Lower sensor 16 Separation promoter input port 17 Separation promoter storage part 31 First on-off valve 32 Second on-off valve 33 Third on-off valve 34 Fourth on-off valve 41 Outflow of used system 42 Inlet of used system

Claims (3)

[Claims] Claims 1. At least a part of a water-soluble oil agent is transferred from a use system using a water-soluble oil agent to a processing system such as a processing tank, and an oil component mixed in the water-soluble oil agent is separated and recovered by a separation accelerator, and the oil component is A method for recycling a water-soluble oil agent, comprising recycling the water-soluble oil agent by returning the separated water-soluble oil agent to a system using the water-soluble oil agent. 2. A processing tank for adding a separation accelerator to a water-soluble oil agent to separate oil, an inlet and an outlet provided at a lower portion of the processing tank, and using the water-soluble oil agent. A forward path for sending the water-soluble oil from the working system to the inlet, and a return path for returning the water-soluble oil from which the oil has been separated while floating upward by the action of the separation accelerator from the outlet provided below the treatment tank to the working system. Thus, the use system is connected to the processing tank, the above-mentioned inlet is provided below the separated oil remaining in the processing tank, and the liquid level rises due to a new water-soluble oil agent flowing from the inlet. An apparatus for recycling a water-soluble oil agent, characterized in that an oil outlet for discharging the separated oil which has risen along with the oil to the outside of the processing tank is provided at an upper portion of the processing tank. 3. A circulation path for circulating the water-soluble oil agent to which the water-soluble oil agent to which the separation accelerator has been added is discharged from the outlet and returned to the inlet port is provided. Is connected to one pump, and a valve is arranged between the circulation path, the forward path, the return path, and the pump, and the transfer of the water-soluble oil in the circulation path, the forward path, and the return path is performed by switching the valve. The recycling apparatus for a water-soluble oil agent according to claim 2, characterized in that: