JP6632135B2 - Oil-water separator - Google Patents

Description

  The present invention relates to an oil-water separator, for example, to an oil-water separator used for collecting oil-containing wastewater discharged from a restaurant or the like, separating the separated oil and water, and collecting the separated oil.

2. Description of the Related Art Conventionally, there is an oil-water separation treatment device that collects oil-containing wastewater (hereinafter, referred to as oil-water) discharged from a kitchen of a restaurant, a factory, a gas station, or the like, and separates it into oil and water. For example, Patent Document 1 discloses an oil-water separation treatment device as shown in FIG.
In FIG. 3, the oil-water separation processing apparatus 50 includes a first processing tank 51 and a second processing tank 52, and has a two-stage configuration in which the second processing tank 52 is disposed above the first processing tank 51. It has become.

When the suction unit 59 (vacuum unit) is driven, the oil water 30 is sucked and collected from the storage unit 60 into the first processing tank 51, and the oil water 30 is filtered by the filter in the first processing tank 51. 53 separates oil 31 and solid residue from water 32. The oil 31 and the solid residue are captured by the filter 53, and the water 32 passes through the filter 53.
Further, the second processing tank 52 is configured to suck and collect the water 32 (referred to as “separated water”) separated in the first processing tank 51 and temporarily store a fixed amount of the separated water 32. When a certain amount of the separated water 32 is stored in the processing tank 52, the supply of the oil water 30 to the first processing tank 51 is temporarily stopped, and the separated water 32 in the second processing tank 52 is discharged out of the tank.

Then, when the level of the separated water 32 in the second processing tank 52 reaches the lower limit level, the above operation is repeatedly executed.
According to the oil-water separation processing device 50 disclosed in Patent Literature 1, it is possible to separate the oil 31 and the residue from the water 32 while sucking the oil water 30.

JP 2005-270797 A

However, in the oil-water separation processing device 50, two large tanks are required, a first processing tank 51 for sucking and storing the oil water and a second processing tank 52 for storing the separated water 32. Therefore, there is a problem that it is not easy to move between work places.
Further, when draining the separated water 32 accumulated in the second processing tank 52, it is necessary to stop driving the suction means 59 (vacuum means) and stop the suction of the oil water 30 into the first processing tank 51. However, there was a problem that the work was interrupted and the efficiency was low.

  The present invention has been made by paying attention to the above-described point, and it is possible to efficiently perform an oil-water separation and recovery operation by separating oil and water while collecting oil and water, and simultaneously draining the separated water. Another object of the present invention is to provide an oil-water separator that can be easily moved between work places by being small and lightweight.

In order to solve the above-described problem, an oil-water separator according to the present invention is an oil-water separator that separates oil and water while collecting oil and water, and a suction pipe from a tank in which the oil and water is stored. A suction unit for sucking the oil water, a tank for storing the oil water sucked by driving the suction unit, an exhaust pipe for exhausting air (gas) in the tank by driving the suction unit, and the exhaust pipe An exhaust / drain pipe formed at a tip side of the exhaust pipe and having a diameter smaller than the diameter of the exhaust pipe and opened at the tip end; and a hydrophilic oil-repellent film provided in the tank and separating water from the oil water and flowing downward. And a drain pipe provided in the tank below the hydrophilic oil-repellent film, connected to the exhaust drain pipe, and configured to flow water separated by the hydrophilic oil-repellent film to the exhaust drain pipe. Having.
It is desirable that the ratio of the diameter of the exhaust drainage pipe to the diameter of the exhaust pipe be 1 / 3.5 or less.
Further, it is preferable that the drain pipe has a check valve for preventing a back flow of gas and liquid into the tank.
Further, it is preferable that a vent pipe penetrating vertically through the hydrophilic oil-repellent film is provided in the tank, and the upper and lower spaces of the hydrophilic oil-repellent film communicate with each other.

With such a configuration, the oil water collected in the tank is separated into oil and water by the hydrophilic oil-repellent film, the separated water flows through the drain pipe, and the air (gas) exhausted by the driving of the suction unit used for sucking the oil water is removed. The exhaust water flows from the exhaust pipe to the exhaust drain pipe, and the separated water in the drain pipe connected to the exhaust drain pipe is sucked and drained by the negative pressure generated in the exhaust drain pipe due to the Venturi effect.
With this configuration, oil water can be separated into oil and water, and the separated water can be immediately drained. That is, the oil / water separation operation can be continued without stopping the oil / water suction operation, and the operation can be performed efficiently.
In addition, a single tank for storing the sucked oil water can be realized, and a small and lightweight configuration allows easy movement between work sites.

  ADVANTAGE OF THE INVENTION According to this invention, oil-water separation | separation collection | recovery work can be performed efficiently by separating oil and water while collect | recovering oil-and-water, and simultaneously draining separated water, and between work places by making small and lightweight. Can be obtained easily.

FIG. 1 is a sectional view schematically showing an oil-water separator according to the present invention. FIG. 2 is a partially enlarged view of a pipe for explaining the ratio of the diameter of the exhaust pipe and the diameter of the venturi pipe included in the oil-water separator of FIG. FIG. 3 is a cross-sectional view of a conventional oil / water separation treatment apparatus.

  Hereinafter, embodiments of an oil-water separator according to the present invention will be described with reference to the drawings. The oil-water separator according to the present invention separates oil and water by sucking a waste liquid containing oil (called oil-water) discharged at a restaurant or a factory, for example, and drains the separated water to remove the oil. To be collected.

  FIG. 1 is a cross-sectional view schematically showing the entire configuration of the oil-water separator according to the present invention. The oil-water separator 1 shown in FIG. 1 is provided with, for example, a steel pail can 2 (tank) for collecting a waste liquid composed of oil water. The size and shape of the pail can 2 are not particularly limited, but a general cylindrical 20 liter can or the like can be used.

The pail 2 has an opening 2 a at an upper portion thereof, and the opening 2 a is closed by a lid member 3. The lid member 3 has an upwardly extending cylindrical portion 3a, and a suction unit 6 (at least a suction unit 6) including a motor 4 as a driving source and a fan 5 rotatable by the motor is provided above the space in the cylindrical portion 3a. The vacuum pressure is 21.8 kPa or more).
Further, the tubular portion 3a has a bellows hose-shaped suction pipe 7 (for example, about 32 mm in diameter) for sucking the waste liquid 30 from the grease trap tank 20 from which the waste liquid has been discharged to the work place, and the inside of the pail can 2 An exhaust pipe 8 for exhausting air is connected to each.

A venturi pipe 9 having a smaller diameter than the exhaust pipe 8 is provided at a distal end of the exhaust pipe 8. Specifically, as shown in FIG. 2, the ratio d2 / d1 of the diameter d2 of the venturi pipe 9 to the diameter d1 of the exhaust pipe 8 is set to 1 / 3.5, whereby the exhaust gas passing through the exhaust pipe 8 is reduced. The speed is increased in the Venturi tube 9. In the present embodiment, the ratio d2 / d1 is set to 1 / 3.5. However, the present invention is not limited to this, and may be 1 / 3.5 or less.
A hydrophilic oil-repellent film 10 is stretched horizontally below the pail can 2. The hydrophilic oil-repellent film 10 is a film for passing only water without passing oil.

  Below the hydrophilic oil-repellent film 10, a funnel member 11 for flowing the separated water 32 passing through the hydrophilic oil-repellent film 10 in one direction is arranged. A check valve 12 for preventing backflow of gas and liquid is provided in a drain pipe section 11a serving as a so-called foot of the funnel member 11, and the drain pipe section 11a extends outside the pail can 2 It is connected to the side of the venturi tube 9 so that the separated water 32 can be drained from the venturi tube 9 to the drain groove 15.

  In the pail 2, a vent pipe 13 is provided in the hydrophilic oil-repellent film 10 so as to penetrate vertically. As a result, the upper and lower spaces of the hydrophilic oil-repellent film 10 are communicated with each other, and the pressures thereof are kept equal. That is, when oil covers the upper surface of the hydrophilic oil-repellent film 10 and air (gas) does not pass, the pressure difference between the space below the hydrophilic oil-repellent film 10 (the space inside the funnel member 11) and the space inside the venturi tube 9. Is provided to prevent the water from being drained.

Next, the operation of the oil-water separator 1 when the worker performs the drainage collection operation using the oil-water separator 1 configured as described above will be described.
The worker moves the oil / water separator 1 to the work site, and introduces the tip of the suction pipe 7 into the grease trap tank 20 at the work site.
Further, the tip of the venturi pipe 9 connected to the tip side of the exhaust pipe 8 is arranged near the drain groove 15.

Next, the operator drives the motor 4 of the suction unit 6, rotates the fan 5, and exhausts the air (gas) in the pail 2 from the exhaust pipe 8.
As a result, the pressure inside the pail can 2 becomes negative, and the waste liquid in the grease trap tank 20, that is, the oil water 30, is sucked into the pail can 2 (in the space above the hydrophilic oil-repellent film 10) through the suction pipe 7.
In the pail can 2, when the oil water 30 accumulates on the upper surface side of the hydrophilic oil-repellent film 10, only the water 32 passes through the hydrophilic oil-repellent film 10 and falls as the separated water 32 on the funnel member 11 below. That is, the oil 31 separated from the water 32 accumulates on the upper surface of the hydrophilic oil-repellent film 10.

  On the other hand, the speed of the air (gas) flowing through the exhaust pipe 8 is increased by the Venturi effect in the Venturi pipe 9, whereby the check valve 12 provided in the drain pipe 11 a is opened by the negative pressure generated in the Venturi pipe 9. When the check valve 12 is opened, the separated water 32 that has fallen on the funnel member 11 flows into the venturi tube 9 and is drained to the drain groove 15.

As described above, in the oil / water separator 1, not only the suction of the oil water 30 from the grease trap tank 20 and the separation of the oil 31 and the water 32 of the oil water 30 but also the discharge of the separated water 32 at the same time. Can be.
As described above, the oil 31 separated from the water 32 accumulates on the hydrophilic oil-repellent film 10 in the pail can 2 as described above. When the inside of the pail can 2 is filled with the oil 31, suction cannot be performed. Therefore, the drive of the motor 4 of the suction unit 6 is stopped, and the accumulated oil 31 is transferred to another pail, for example, so that the oil water 30 Suction can be performed.
When the oil water 30 runs out of the grease trap tank 20, the operator stops driving the motor 4 of the suction unit 6, and ends the work at the site.
If there is a next work site, the oil / water separator 1 is moved, and the operation of separating and collecting the oil / water 30 is performed again.

As described above, according to the embodiment of the present invention, the oil water 30 collected in the pail can 2 is separated into the oil 31 and the water 32 by the hydrophilic oil-repellent film 10, and the separated water 32 is transferred from the funnel member 11 to the drain pipe 11a. The drain pipe connected to the venturi pipe 9 by the negative pressure generated in the venturi pipe 9 by flowing the air exhausted by the driving of the suction unit 6 used for sucking the oil water 30 from the exhaust pipe 8. The separated water 32 in 11a was sucked and drained.
With this configuration, the oil water 30 can be separated into the oil 31 and the water 32, and at the same time, the separated water 32 can be immediately drained. That is, the oil / water separation operation can be continued without stopping the suction operation of the oil / water 30, and the operation can be performed efficiently.
In addition, a tank for storing the sucked oil water 30 can be realized with only one pail can 2 and can be easily moved between work sites with a small and lightweight configuration.

In the above-described embodiment, a pail can is used as the tank for storing the oil water 30. However, the oil-water separator of the present invention is not limited to this form.
That is, any container having a certain capacity can be used as a tank for sucking and collecting the oil water 30 regardless of its shape.

1 Oil / water separator 2 Pail can (tank)
DESCRIPTION OF SYMBOLS 3 Cover part 4 Motor 5 Fan 6 Suction part 7 Suction pipe 8 Exhaust pipe 9 Venturi pipe 10 Hydrophilic oil-repellent film 11 Funnel member 11a Drain pipe 12 Check valve 13 Vent pipe 15 Drainage groove 20 Grease trap tank 30 Oil water 31 Oil 32 Water

Claims (4)

An oil / water separator for separating oil and water while collecting oil / water,
A suction unit that sucks the oil water from a tank in which the oil water is stored via a suction pipe;
A tank for storing the oil water sucked by driving the suction unit,
An exhaust pipe for exhausting gas in the tank by driving the suction unit;
An exhaust / drain pipe provided on the tip side of the exhaust pipe and formed with a smaller diameter than the diameter of the exhaust pipe and opened at the tip end,
A hydrophilic oil-repellent film provided in the tank and separating water from the oil water and flowing downward,
A drain pipe provided in the tank below the hydrophilic oil-repellent film, connected to the exhaust drain pipe, and configured to flow water separated by the hydrophilic oil-repellent film to the exhaust drain pipe. Oil-water separator.   The oil / water separator according to claim 1, wherein a ratio of a diameter of the exhaust drain pipe to a diameter of the exhaust pipe is 1 / 3.5 or less.   3. The oil / water separator according to claim 1, wherein the drain pipe has a check valve for preventing a back flow of gas and liquid into the tank.   4. The tank according to claim 1, further comprising a vent pipe vertically penetrating the hydrophilic oil-repellent film in the tank, wherein upper and lower spaces of the hydrophilic oil-repellent film communicate with each other. 5. Oil-water separator.

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