JP2003251102A - Oil-water separation and recovery apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil-water separation and recovery apparatus for easily separating oil and water to recover the in a separated state. <P>SOLUTION: This oil-water separation and recovery apparatus 1 is equipped with a storage container 6 in which a storage space 5 capable of storing an oil-water mixed fluid containing oil and water 3 is formed, a glass window 8 provided to the side wall 7 of the storage container 6, an introducing part 11 for introducing the oil-water mixed fluid into the storage space 5, a pump 13 for generating suction pressure, an oil recovery pipe 15 communicating with the storage space 5 at its one end from the upper wall 14 of the storage container 6 and connected to the suction port of the pump 13 at its other end, a water recovery pipe 16 communicating with the flow channel of the oil recovery pipe 15 at one end thereof and piercing the upper wall 14 to be embedded in the storage space 5 at the other end thereof up to the vicinity of the lower end of the storage space 5, an oil recovery valve 17 and a water recovery valve 18 capable of opening and closing the oil recovery pipe 15 and the water recovery pipe 16, a drain part 21 and an oil discharge part 24 communicating with the storage space 5 of the storage container 6 and an oil absorbing mat 29 provided in the storage container 6 between the introducing part 11 and the drain part 21. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating and recovering oil and water, and more particularly to an oil / water separation / collection apparatus for separating and recovering by utilizing a difference in specific gravity.

[0002]

2. Description of the Prior Art Among fuel oils such as gasoline, kerosene, light oil, and heavy oil used in the fields of gas stations, automobiles, railways, and aircraft, they have been oxidized and become old without being used. In addition, a large amount of waste oil (waste containing oil) used as a cleaning agent for machines and used as a cleaning agent for machines in various factories is disposed of. In addition, mechanical oil, hydraulic oil used in the above-mentioned factory,
Lubricating oils such as quenching oils and cutting oils are oxidized and deteriorate in quality during repeated use, and are therefore disposed of in large quantities as waste oils.

At this time, in order to dispose of the above-mentioned waste oil discharged from the factory, it is necessary to install new equipment for processing waste oil in the factory, which requires a great deal of cost. Therefore,
The company contracts contracts for waste oil treatment with a company that specializes in waste treatment, etc., to reduce treatment costs. In this case, the processor often pays the amount of waste oil collected according to the amount of waste oil collected.

Further, in factories and gas stations, storage tanks may be installed underground to temporarily store a large amount of waste oil that is discharged. Then, the waste oil stored in the storage tank is collected by the above-mentioned processing company. As a specific method for collecting waste oil, there is a method called a vacuum method using a vehicle having a waste oil recovery facility such as a tank truck. In order to collect the waste oil in the recovery tank of the tank truck, the suction pipe is immersed in the storage tank, and the inside of the recovery tank of the tank truck is decompressed by the vacuum pump.
A pressure difference is generated between it and the outside air to suck the waste oil in the storage tank.

By the way, an accident may occur during transportation by the tank truck or the like, and waste oil may flow out to the sea or rivers. At this time, if the outflow amount of the waste oil is large, the waste oil is recovered by using a suction-type or dredger-type oil recovery dedicated recovery machine. This recovery machine utilizes the fact that waste oil and water are collected together in a recovery tank, and then the waste oil and water are separated according to the difference in specific gravity (waste oil is separated into the upper side and water is separated into the lower side). The waste oil and the water are separately discharged from the lower side and the side of the recovery tank to be recovered. On the other hand, when the amount of waste oil that has flown out is comparatively small, the oil may be manually recovered mainly by using an oil fence or an oil absorption mat without using the above-mentioned recovery machine.

[0006]

However, the waste oil stored in the storage tank described above may contain a small amount of water due to humidity and other factors. When the waste oil in the storage tank is collected by the processor, collecting and separating water is a time problem and labor for the operator is large. Therefore, collect the waste oil and water together. There were many Therefore, in the case of a system that pays the amount of money according to the amount of waste oil to be collected to the processing company as described above, since the mixed water is added in addition to the original amount of waste oil, the processing cost paid to the processing company is extra. It depended on me.

Further, in the accident of waste oil flowing out to the sea or rivers, a large amount of cost was required when the above-mentioned recovery machine was used. Further, the recovery machine is often large in size, and the installation location and the like cannot be sufficiently secured, so that its use is sometimes restricted. On the other hand, there is a problem in that a large amount of personnel, time and labor are required when performing manual recovery.

In view of the above situation, it is an object of the present invention to provide an oil / water separation / collection device for easily separating and collecting oil and water.

[0009]

In order to solve the above problems, in the oil-water separation and recovery apparatus according to the invention of claim 1, a storage space capable of storing an oil-water mixed liquid containing oil and water is formed inside. A storage container, which communicates with the storage space of the storage container, an introduction section which introduces the oil-water mixed liquid into the storage space, and a communication from the upper wall of the storage container to the storage space,
The oil-water mixed liquid is connected to the oil recovery unit that recovers the oil in the storage space separated upward by the difference in specific gravity and the oil recovery unit, and reduces the pressure in the storage space, thereby reducing the pressure difference. Utilizing, introducing the oil-water mixed liquid into the storage space from the introduction part, a suction means for sucking and collecting the separated oil from the oil recovery part, and the storage space of the storage container It is provided with a drainage part which communicates with each other and drains and collects the water in the storage space which is separated downward due to a difference in specific gravity.

Here, the oil is a non-water-soluble oil produced from petroleum and animals and plants, and the oil that has been oxidized in an unused state or the waste oil used and discharged in a factory or the like is a recovery target. Can be mentioned. It should be noted that a mixture of oil and water generally has the property of separating in the container (oil separates upward and water separates downward) due to the difference in specific gravity between oil and water.

The storage container is a container formed of stainless steel, aluminum, FRP material or the like and having a space capable of storing oil or water therein.

Further, the suction means is exemplified by a pump having a suction port and a discharge port. Specifically, the suction pressure generated from the drive unit of the pump is used to suck gas or liquid from the suction port and discharge them from the discharge port.
The types of pumps are classified into vacuum pumps and blowers depending on their structure. Further, mechanically, it is divided into a reciprocating pump, a rotary pump, a centrifugal pump, and the like. Thereby, for example, when the container whose inside is closed is connected to the suction port or the discharge port using a pipe or the like and the pump is driven, the inside of the container can be depressurized or pressurized.

In addition, examples of the introduction section, the oil recovery section, and the drain section include a pipe including a water stopcock used for general piping. That is, it is possible to circulate oil and water in the pipe by connecting the pipe to the inside of a container that stores oil and water and opening and closing each valve using a cock or the like. Become. Furthermore, the flow rate can be adjusted by adjusting the opening of the cock.

Therefore, according to the oil-water separation and recovery apparatus of the first aspect, it is possible to depressurize the storage space inside the storage container by the suction means and generate a pressure difference between the storage space and the outside air. Then, due to this pressure difference, the oil-water mixed liquid containing oil and water is introduced into the storage space from the introduction portion. After that, oil is separated into the upper side and water is separated into the lower side in the storage space due to the difference in specific gravity. Further, the separated oil is sucked and collected from the oil collecting section by the suction means.
Also, the separated water is discharged from the drainage part and collected.
That is, by utilizing the pressure difference generated by the suction means, it is possible to continuously introduce the oil-water mixed liquid into the storage space, and further suck and collect the separated oil from the oil recovery unit. Accordingly, when the proportion of oil in the oil-water mixture is large, the work of separating and collecting oil and water can be performed particularly efficiently.

According to a second aspect of the present invention, there is provided an oil / water separation / recovery apparatus according to the first aspect, wherein the oil / water separation / recovery apparatus communicates with a side wall of the storage container to the storage space and laterally discharges and separates the separated oil. The oil drain unit is further provided.

Here, the oil draining section is, for example, a pipe including a water stopcock used for general piping, like the above-mentioned introducing section, oil collecting section, and drain section. To be

Therefore, according to the oil / water separation / collection device of claim 2, in addition to the operation of the oil / water separation / collection device of claim 1,
Since the oil in the storage space can be discharged laterally by the oil discharge section of the storage space without being sucked from above by the suction means, the separated oil can be easily collected.

The oil / water separation / collection device according to a third aspect is the oil / water separation / recovery device according to the first or second aspect, wherein the oil is provided in the storage space and the oil is mixed with the water discharged from the drainage section. It further comprises an oil prevention means for preventing this.

Here, the oil preventing means is, for example, an oil absorbing material formed of a lipophilic plastic or synthetic fiber having a very high oil absorbing ability that allows water to pass therethrough while adsorbing oil. Is mentioned. These are well-known materials used for oil absorbing mats, waste cloths, and the like.

Incidentally, if oil exceeding the oil absorption capacity of the oil prevention means is attached at one time, there is a possibility that the unadsorbed oil may be mixed with the water recovered from the storage space. Therefore, for example, it is desirable that the oil prevention means is provided at a lower position than the introduction part in the storage space and that water is stored in advance to a higher position than the oil prevention means. With this, when the oil-water mixed liquid is introduced into the storage space, most of the oil is separated to the upper side of the water, so that a large amount of oil is prevented from being adsorbed at one time by the oil prevention means.

Therefore, according to the oil / water separation / recovery apparatus of the third aspect, in addition to the function of the oil / water separation / recovery apparatus of the first or second aspect, the oil prevention means adds the oil to the water discharged from the drainage section. Mixing is prevented and impurities are less likely to be mixed in the recovered water.

An oil / water separation / collection device according to a fourth aspect is the oil / water separation / recovery device according to any one of the first to third aspects, in which the amount of the oil and water stored in the storage space is confirmed. It further comprises a quantity confirmation means.

Here, the stored amount confirmation means is, for example, by providing a transparent acrylic plate or glass plate on the side wall of the container so that the stored amount can be visually confirmed when water or the like is stored in the container. Examples of such devices include those that are stored, and that the amount of storage is detected by a sensor and the like is notified to the outside by sound or the like. In addition, by providing a transparent pipe that communicates with the inside of the container at one end near the bottom and the other end near the top along the side surface of the container to the outside, the storage amount in the container is circulated in the pipe and is visible. It may be one that does.

Therefore, according to the oil / water separation / recovery apparatus of the fourth aspect, in addition to the operation of the oil / water separation / recovery apparatus of any one of the first to third aspects, the storage amount of oil and water in the storage container is external. Can be confirmed from. That is, it becomes possible to perform the recovery work while confirming the amounts of oil and water in the storage space, and the recovery work becomes simple and reliable.

According to a fifth aspect of the present invention, there is provided the oil / water separation / recovery device according to any one of the first to fourth aspects, wherein the oil / water separation / recovery device is inserted from the upper wall of the storage container and is in the storage space. Further includes a water recovery unit that is immersed near the lower end of the water recovery unit and recovers the separated water, and a water absorbing unit that is connected to the water recovery unit and that sucks and recovers the separated water from the water recovery unit. It is a thing.

Here, as the water absorbing means, one having the same structure and function as the above-mentioned suction means can be used.

Therefore, in the oil / water separation / collection device of the fifth aspect, in addition to the operation of the oil / water separation / recovery device of any one of the first to fourth aspects, the water separated by the water absorbing means to the lower side in the storage space. The water can be continuously sucked and recovered from the water recovery unit. As a result, particularly when the proportion of water in the oil-water mixture is large, the recovery work can be efficiently performed.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION An oil / water separation / recovery apparatus 1 according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a perspective view showing a configuration of an oil / water separation / collection device 1 of the present embodiment, FIG. 2 is an explanatory view for explaining a state of collecting oil 2 from an oil recovery pipe 15, and FIG. FIG. 4 is an explanatory diagram illustrating a state in which the part 21 and the oil 2 are recovered from the oil discharge part 24, and FIG. 4 is an explanatory diagram illustrating a state in which the water 3 is recovered from the water recovery pipe 16.

The oil-water separation and recovery apparatus 1 of this embodiment is shown in FIG.
As shown in FIG. 2, a storage container 6 having a substantially rectangular parallelepiped shape and having therein a storage space 5 capable of storing an oil-water mixed liquid 4 in which oil 2 and water 3 are mixed, and a side wall of the storage container 6. 7, a glass window 8 provided on one surface, an introduction pipe 9 communicating with the storage space 5 of the storage container 6, and an introduction portion 11 having an introduction valve 10 capable of opening and closing the flow path of the introduction pipe 9, an intake port, and A pump 13 having a discharge port (both not shown) and a discharge pipe 12 connected to the discharge port, one end communicates from the upper wall 14 of the storage container 6 to the storage space 5, and the other end sucks the pump 13. An oil recovery pipe 15 connected to the mouth, and a water recovery pipe 16 having one end communicating in the middle of the oil recovery pipe 15, penetrating the upper wall 14 of the storage container 6 and the other end being immersed near the lower end in the storage space 5. An oil recovery valve 17 for opening and closing the flow paths of the oil recovery pipe 15 and the water recovery pipe 16, respectively. A recovery valve 18, a drainage section 21 having a drainage pipe 19 and a drainage valve 20 communicating with the storage space 5 of the storage container 6, and an oil drain pipe 22 and an oil drainage valve 23 similarly communicating with the storage space 5 of the storage container 6. The oil drainage portion 24 that is provided, the ventilation portion 25 that has the ventilation pipe 25 and the ventilation valve 26 that communicate with the storage space 5, and the compound total 2 that is provided on the upper wall 14 of the storage container 6
8 and an oil absorption mat 29 provided inside the storage container 6 between the introduction part 11 and the drain part 21.
Here, the glass window 8 corresponds to the storage amount confirmation means of the present invention, the pump 13 corresponds to the suction means and the water absorption means of the present invention, and the oil recovery pipe 15 and the oil recovery valve 17 function as the oil recovery part of the present invention. Correspondingly, the water recovery pipe 16 and the water recovery valve 18 correspond to the water recovery part of the present invention, and the oil absorption mat 29 corresponds to the oil prevention means of the present invention.

Oil 2 is waste oil discharged from a gas station or the like. Here, when the oil-water mixed liquid 4 containing the oil 2 and the water 3 is stored in the storage space 5, the oil 2 is separated into the upper side and the water 3 is separated into the lower side. This is because the intermolecular attractive force acting on each of the oil 2 and the water 3 is larger than the mutual attractive force (interfacial tension) acting on the interface between the oil 2 and the water 3, and the specific gravity of the oil 2 is equal to that of the water 3 This is because it is smaller than the specific gravity of. From the above, the oil 2 is separated on the upper side and the water 3 is separated on the lower side to form respective layers, and they are not mixed with each other.

As the pump 13, a general angular momentum conversion type turbo pump composed of a casing and an impeller (both not shown) is used. Specifically, the suction pressure is generated by the rotation of the impeller of the pump 13, whereby the gas in the storage space 5 is sucked and depressurized from the oil recovery pipe 15 connected to the suction port. It is also possible to separate the oil 2 that has separated to the upper side in the storage space 5 and has reached the upper wall 14 surface of the storage space 5 by suction from the oil recovery pipe 15 by means of suction pressure. Here, the pump 13 uses a commercial power source (not shown) capable of supplying power from a general household as a power source.

The storage container 6 is made of stainless steel. Furthermore, the pump 1 described above
Even if the inside of the storage space 5 is decompressed by the suction pressure of 3, the storage container 6 has a strength such that it is not deformed or damaged, and the wall surface is formed with a certain thickness.

Further, the compound gauge 28 is a pressure measuring device capable of measuring a pressure above atmospheric pressure and a vacuum pressure below atmospheric pressure.
Thereby, the user of the apparatus can confirm the internal pressure of the storage space 5 by the display of the compound gauge 28.

Further, the ventilation portion 27 can open and close the storage space 5 by opening and closing the ventilation valve 26. Specifically, the storage space 5
If the ventilation valve 26 is opened while the pressure is reduced,
From the outside, the outside air flows into the storage space 5, and the storage space 5 has the same pressure as the outside air. On the other hand, when the ventilation valve 26 is closed and the pump 13 is driven, the storage space 5 is depressurized.

In addition, as the oil absorbing mat 29, an oil absorbing material formed in a mat type with polypropylene having excellent lipophilicity and hydrophobicity is used. More specifically, the oil absorption mat 29 is formed to have a shape that is substantially the same as the cross section of the storage space 5, allows the water 3 in the storage space 5 to permeate through, and has the property of adsorbing the oil 2 inside. is doing.

Next, a method of using the oil / water separation and recovery apparatus 1 will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the water 3 is stored in advance in the storage space 5 of the storage container 6 to a position higher than the oil absorption mat 29. Then, the drive power source of the pump 13 is turned on with the introduction valve 10, the water recovery valve 18, the drain valve 20, the oil drain valve 23, and the ventilation valve 26 closed. As a result, suction pressure is generated by driving the pump 13, and the oil recovery pipe 1 connected to the suction port of the pump 13
The inside of the storage space 5 is depressurized via

Next, as shown in FIG. 2, one end of the introduction pipe 9 is immersed in the storage tank 30 in which the oil-water mixed liquid 4 is stored,
When the introduction valve 10 is opened, the oil / water mixed liquid 4 in the storage tank 30 is introduced into the storage space 5 through the introduction pipe 9 due to the pressure difference between the depressurized storage space 5 and the outside air. (Direction of arrow A).

Then, the oil-water mixed liquid 4 introduced into the storage space 5 is mixed with the water 3 previously stored in the storage space 5,
Further, due to the difference in specific gravity between the oil 2 and the water 3, the oil 2 is separated upward and the water 3 is separated downward.

At this time, the oil 2 is dispersed in the water 3 due to the momentum of the oil-water mixed liquid 4 being introduced into the storage space 5, and the oil 2 that has reached the oil absorbing mat 29 together with the water 3 is the oil absorbing mat 29.
The oil 2 is hardly admixed with the water 3 below the oil absorbing mat 29.

Furthermore, depending on the suction pressure of the pump 13,
The oil-water mixed liquid 4 is introduced from the introduction pipe 9 into the storage space 5,
When the upper liquid level of the oil 2 reaches the upper surface of the storage space 5, the separated oil 2 is sucked from the oil recovery pipe 15 and recovered in the oil recovery container 31 through the pump 13 along the arrow B direction in FIG. It As a result, a free space equivalent to the amount of the recovered oil 2 is created in the storage space 5, so that the oil-water mixed liquid 4 is further introduced into the storage space 5 by the suction pressure, and the separation and recovery of the oil 2 are continuously performed. To be done.

If the above operation is continued, only the separated oil 2 is recovered from the oil recovery pipe 15 into the oil recovery container 31, so that the storage space 5 has a higher ratio of water 3 to oil 2. . That is, the interface between the oil 2 and the water 3 rises. Therefore,
The pump 13 is operated to stop the generation of suction pressure, the oil recovery valve 17 is closed, and the ventilation valve 26 is opened to open the storage space 5 to the outside air. Then, after confirming that the storage space 5 and the outside air have the same pressure by the pressure display of the compound gauge 28, the drain valve 20 is opened. As a result, the water 3 in the storage space 5 is discharged from the drain pipe 19 along the direction of arrow C in FIG. On the other hand, for the oil 2 stored in the storage space 5, as shown in FIG. 3, after the vent valve 26 is opened to make the inside of the storage space 5 at the same pressure as the outside air, the oil discharge valve 2
3 is opened so that the oil drain pipe 2 is moved in the direction of arrow D.
2 can be discharged and collected in the oil collecting container 31.

At this time, since the oil 2 does not mix with the water 3 below the oil recovery mat 29 by the oil absorbing mat 29, impurities such as impurities may be mixed with the water 3 and discharged from the drain pipe 19. Absent. In addition, from the glass window 8 to the storage space 5
Check the storage amounts of oil 2 and water 3 inside the storage space 5
It is desirable that the stored amount of water 3 in the inside is always kept higher than the oil absorption mat 29. Then, be careful not to accidentally discharge the water 3 from the oil drain pipe 22.

By the way, when the proportion of the water 3 in the oil-water mixture 4 introduced into the storage space 5 is large, the water 3 may be discharged from the drain pipe 19 and recovered as described above. However, every time the stored amount of the water 3 increases, the pump 13 must be frequently stopped to perform the recovery work, which reduces the recovery efficiency. Therefore, as shown in FIG. 4, after depressurizing the storage space 5, the oil recovery valve 17 is closed and the water recovery valve 18 is opened, so that the water 2 is recovered by the pump 13 into the water recovery pipe 16.
May be sucked upward and collected in the water collecting container 32 (direction of arrow E).

That is, the oil recovery valve 17 and the water recovery valve 18 are operated in accordance with the proportion of the oil 2 and the water 3 in the oil-water mixture 4 introduced into the storage space 5 and the flow path communicating with the pump 13 is operated. Can be switched to the oil recovery pipe 15 or the water recovery pipe 16 and each can be sucked and recovered by the suction pressure.

In this way, the oil / water separation / collection apparatus 1 utilizes the pressure difference from the outside air to introduce the oil / water mixed liquid 4 into the storage space 5, and separates it by the difference in the specific gravity between the oil 2 and the water 3.
It is possible to continuously perform the work of collecting and. That is, the work of separating and recovering a large amount of oil 2 and water 3 can be performed simply and efficiently. Therefore, since only the waste oil can be collected by the treatment company, in the case of a system in which the treatment company pays the amount of money according to the amount of collected waste oil, it is less likely to pay an extra collection cost of 3 minutes of water. It is possible to reduce the cost required for the conventional waste oil treatment.

Also, due to an accident during the transportation of waste oil,
When the waste oil flows out to the sea or a river, the oil / water separation / collection device 1 can be used to perform an efficient recovery work. As a result, the work becomes simpler and the cost such as the labor cost can be reduced as compared with the manual collection work which has been performed conventionally.

The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to these embodiments, and as will be described below, various modifications are possible without departing from the scope of the present invention. It is possible to improve and change the design.

That is, the oil recovery pipe 15 and the water recovery pipe 16
Although the flow path of is connected to one pump 13,
One pump may be connected to each of the oil recovery pipe 15 and the water recovery pipe 16. Accordingly, by simultaneously driving the two pumps, the oil 2 is sucked and collected from the oil recovery pipe 15, and the water 3 is supplied from the water recovery pipe 16.
Can be sucked and collected at once, and the oil 2 and water 3 can be separated and collected more efficiently.

Further, in this embodiment, the storage container 6
Although one oil draining section 24 is provided on the side wall 7 of the above, a plurality of oil draining sections 24 may be provided depending on the height of the storage container 6. This makes it possible to select a suitable oil drainage unit 24 according to the storage amounts of the oil 2 and the water 3 in the storage space 5 and discharge and recover most of the oil 2 in the storage space 5. . Therefore, after the recovery work is completed, a large amount of sludge or the like contained in the waste oil does not remain in the storage space 5, so that the oil / water separation / recovery device 1 can be stored hygienically.

In addition, if the pump 13 is used for a long time, the pump 13 may become unusable due to the frictional heat generated by the rotation of the impeller while the pump 13 is operating. Therefore, for example, an oil supply tank for supplying lubricating oil to the pump 13 at regular intervals may be provided to suppress the seizure of the pump 13. As a result, the pump is less likely to be damaged by baking and the suction performance is not deteriorated, and the pump can be used for a long period of time.

[0051]

As described above, the oil-water separation and recovery apparatus of the invention of claim 1 introduces the oil-water mixed liquid into the storage space by utilizing the pressure difference, and separates the oil and the water vertically separated in the storage space. The work of collecting the can be simplified. In addition, since the oil can be continuously recovered from the oil recovery unit, it is preferable because the efficiency is high especially when the ratio of the oil in the oil-water mixture is large.

According to the oil / water separation / collection device of claim 2, in addition to the effect of the oil / water separation / collection device of claim 1, the oil separated to the upper side in the storage space by the oil discharge part is located laterally of the storage container. It can be discharged from and collected. Therefore, the oil remaining in the storage space can be easily collected without being sucked from above.

According to the oil / water separation / collection apparatus of claim 3, in addition to the effect of the oil / water separation / collection apparatus of claim 1 or 2, the oil prevention means can prevent oil from being mixed into the water, and Impurities do not mix with the discharged water.

According to the oil / water separation / recovery device of the fourth aspect, in addition to the effect of the oil / water separation / recovery device of any one of the first to third aspects, each of them is discharged while confirming the storage amounts of oil and water. Therefore, the oil and water recovery work can be reliably performed.

The oil-water separation and recovery device of claim 5 is the same as that of claim 1.
In addition to the effect of the oil / water separation / collection device according to any one of claims 4 to 4, the water separated to the lower side in the storage space can be recovered from the water recovery unit by utilizing the pressure difference. Therefore, since water can be continuously sucked and recovered from the water recovery unit, particularly when the ratio of water in the oil-water mixed liquid is large, the recovery work can be performed more efficiently, which is more preferable. Become.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an oil / water separation / collection device of the present embodiment.

FIG. 2 is an explanatory diagram illustrating a state in which oil is recovered from an oil recovery pipe.

FIG. 3 is an explanatory diagram illustrating a state in which water is collected from a drain portion and oil is collected from an oil drain portion.

FIG. 4 is an explanatory diagram illustrating a state of collecting water from a water recovery pipe.

[Explanation of symbols]

1 Oil-water separation and collection device 2 oil 3 water 4 oil-water mixture 5 Storage space 6 Storage container 7 Side wall 8 glass windows (storage amount confirmation means) 11 Introduction 13 Pumps (suction means, water absorption means) 14 Upper wall 15 Oil recovery pipe (oil recovery section) 16 Water recovery pipe (water recovery section) 17 Oil recovery valve (oil recovery section) 18 Water recovery valve (water recovery section) 21 Drain 24 Oil drain 29 Oil absorption mat (oil prevention means)

Claims (5)

[Claims] 1. A storage container in which a storage space capable of storing an oil-water mixed liquid containing oil and water is formed, and a storage container communicating with the storage space of the storage container for storing the oil-water mixed liquid in the storage space. An introduction part to be introduced, an oil recovery part that communicates with the storage space from the upper wall of the storage container, and recovers the oil in the storage space in which the oil-water mixed liquid is separated upward due to a difference in specific gravity; By connecting to an oil recovery unit and reducing the pressure in the storage space, the pressure difference is used to introduce the oil-water mixed liquid from the introduction unit into the storage space, and the separated oil is used as the oil recovery unit. Suction means for sucking and collecting the water from the storage container, and a drainage part communicating with the storage space of the storage container and discharging and collecting the water in the storage space separated downward due to a difference in specific gravity. Oil and water separation and recovery equipment characterized by . 2. The oil / water separation / recovery according to claim 1, further comprising an oil discharge part that communicates from a side wall of the storage container to the storage space and discharges and separates the separated oil from the side. apparatus. 3. The oil preventing means provided in the storage space for preventing the oil from being mixed with the water discharged from the drain section, according to claim 1 or 2. Oil-water separation and recovery device. 4. The oil-water according to any one of claims 1 to 3, further comprising a storage amount confirmation means for confirming a storage amount of the oil and the water in the storage space. Separation and collection device. 5. A water recovery part that is inserted from the upper wall of the storage container and is immersed up to near the lower end of the storage space to recover the separated water, and is connected to the water recovery part to separate the water. The oil / water separation / collection device according to any one of claims 1 to 4, further comprising water absorbing means for sucking and collecting the water from the water recovery unit.