JP3175865U - Floating oil recovery device - Google Patents

Abstract

A floating oil recovery apparatus is provided that can recover an oil component at a high concentration by securing a recovery amount, and can eliminate the need for replacement and adjustment of a blade and a suction drum due to wear.
A floating oil collecting apparatus (1) includes a first separation tank (21) for floating an oil component (O) with respect to a water-soluble component (W), a first adsorption drum (22) for depositing an oil component (O), and an oil component (O) to a first adsorption drum (22). A first aeration 23 to collect and a first blade 24 having a predetermined gap 241 and scraping off the oil O adhering to the outer periphery of the first adsorption drum 22 are provided. Further, the oil component O is received from the first blade 24, the second separation tank 31 that floats the oil component O with respect to the water-soluble component W, the second adsorption drum 32 to which the oil component O is adhered, and the oil component O to the second adsorption drum 32. And a second blade 34 that scrapes off the oil component O adhering to the outer periphery of the second adsorption drum 32 with a predetermined gap 341.
[Selection] Figure 1

Description

  The present invention relates to a floating oil recovery apparatus that recovers oil contained in water.

As a coolant used for machine tools and the like, there is a water-soluble coolant. This water-soluble coolant is mixed with lubricating oil, sliding oil, etc. used in machine tools and the like, and the oil is mixed in the water. Then, when the water-soluble coolant mixed with this oil component is sent to the floating oil recovery device (oil skimmer), the oil component is separated from the water-soluble component and recovered.
For example, in the coolant device of Patent Document 1, the chips generated during workpiece machining are separated from the dirty liquid mixed with the coolant. In addition, the oil skimmer is rotated in conjunction with the driving of a drum-type filter that separates the chips from the dirty liquid. And the oil component (floating oil) which floated on the surface of the coolant is wound around the belt and collected.

JP 2010-158745 A

  However, in the conventional floating oil recovery apparatus, oil adsorbed on the adsorption belt is scraped off by a scraping plate that contacts the adsorption belt. The oil component adsorbed on the adsorption belt contains a water-soluble component. For this reason, there is a limit to increasing the concentration of oil scraped off by the scraping plate. Further, when wear occurs on the scraping plate and the suction belt, it is necessary to replace and adjust them.

  The present invention has been made in view of such a background, and it is possible to collect a high concentration of oil by securing a recovery amount, and to make it unnecessary to replace and adjust a blade and a suction drum due to wear. It was obtained in an attempt to provide a recovery device.

The present invention includes a first separation tank that receives a contaminated liquid containing an oil component in a water-soluble component, and floats and stores the oil component with respect to the water-soluble component;
A first adsorbing drum that rotates about a rotation axis directed in the horizontal direction, and dipping the lower portion of the outer periphery in the contaminated liquid in the first separation tank to attach an oil component;
A first blade disposed on the outer periphery of the first suction drum with a predetermined gap, and scraping off the oil adhering to the outer periphery of the first suction drum;
A second separation tank that receives the oil scraped off by the first blade and floats and stores the oil with respect to the water;
A second adsorbing drum that rotates around a horizontal axis of rotation and dipping the lower part of the outer periphery in the contaminated liquid in the second separation tank to attach oil;
A floating oil recovery apparatus comprising: a second blade disposed on the outer periphery of the second suction drum with a predetermined gap and scraping off the oil adhering to the outer periphery of the second suction drum ( Claim 1).

The floating oil recovery apparatus includes a separation tank, an adsorption drum, and a blade in two stages. In the floating oil recovery apparatus, oil is recovered from the contaminated liquid as follows.
The contaminated liquid is supplied to the first separation tank, and the oil content of the contaminated liquid in the first separation tank floats on the water content due to the difference in specific gravity. In the first separation tank, the first adsorption drum is rotated. Then, the oil in the first separation tank is adsorbed on the outer periphery of the first adsorption drum, and this oil is extracted to the upper portion of the outer periphery of the first adsorption drum that is taken out from the water-soluble component.

Next, when the oil component in the upper part of the outer periphery comes into contact with the first blade, the oil component is scraped off by the first blade and supplied to the second separation tank. At this time, the first blade scrapes off the oil without contacting the outer periphery of the first suction drum. Further, the water-soluble component remaining in the oil component can fall from the gap between the first adsorption drum and the first blade.
In the second separation tank, the concentration of the oil component floating on the water-soluble component is increased by the oil component supplied from the first blade. Further, the second adsorption drum is also rotated in the second separation tank.

Then, the oil component having a high concentration is adsorbed on the outer periphery of the second adsorption drum, and this oil component is extracted to the upper part of the outer periphery of the second adsorption drum, which is taken out from the water-soluble component. Next, when the oil component in the upper portion of the outer periphery comes into contact with the second blade, the oil component is scraped off by the second blade and collected in an oil component tank or the like. At this time, the second blade scrapes off the oil without contacting the outer periphery of the second suction drum. Further, the water-soluble component remaining in the oil component can fall from the gap between the second adsorption drum and the second blade.
Note that the separation tank, the suction drum, and the blade can be provided in three or more stages.

In this way, the floating oil recovery device can increase the concentration of the scraped oil by further sucking and scraping the oil adsorbed on the first adsorbing drum onto the second adsorbing drum. . In each suction drum, each blade scrapes off the oil without contact. This eliminates the need for replacement and adjustment of each blade and each suction drum due to wear.
Generally, if a gap is provided between the blade and the suction drum, it is considered that the amount of oil recovered is reduced. However, if the blade is in contact with the suction drum, the water content is also scraped off when the oil adhering to the outer periphery of the suction drum is scraped off.

  Therefore, in the floating oil recovery device, a gap is provided between the blade and the suction drum, while the blade and the suction drum are provided in two stages, thereby ensuring the oil recovery amount and increasing the concentration of the recovered oil. Can be achieved. As a secondary effect of providing a gap, it is possible to eliminate the need for replacement and adjustment of the blade and the suction drum due to wear.

  Therefore, according to the above floating oil recovery apparatus, it is possible to secure the recovery amount and recover the oil component at a high concentration, and it becomes unnecessary to replace and adjust the blade and the suction drum due to wear.

Explanatory drawing which shows typically the floating oil collection | recovery apparatus concerning an Example.

A preferred embodiment of the above-described floating oil recovery apparatus will be described.
In the floating oil recovery apparatus, the contaminated liquid may be a part of a water-soluble coolant used in various machines or a part of a water-soluble cleaning liquid used in a cleaning apparatus.
The first separation tank and the second separation tank are formed by being partitioned by a downstream partition wall having a lower opening in one liquid tank, and the lower opening is opened in the liquid tank. In the state partitioned by the upstream partition wall, the spare tank adjacent to at least one of the first separation tank and the second separation tank, and the spare tank partitioned by the height-adjustable adjustment wall. An adjacent overflow tank may be formed (Claim 2).

  In this case, the height of the liquid level of the contaminated liquid (water component and oil component) in the first separation tank and the second separation tank can be changed by adjusting the height of the adjustment wall. When the upper end position of the adjustment wall is lowered, the contaminated liquid overflows from the first separation tank and the second separation tank over the adjustment wall to the reserve tank, and the level of the contaminated liquid in the first separation tank and the second separation tank is lowered. To do. On the other hand, when the upper end position of the adjustment wall is increased, the adjustment wall is blocked and the liquid level of the contaminated liquid in the first separation tank and the second separation tank rises.

By adjusting the height of the adjustment wall, the liquid level of the contaminated liquid is appropriately adjusted with respect to the height positions of the first adsorbing drum and the second adsorbing drum according to the type of oil contained in the contaminated liquid. Can be adjusted.
Further, by using the upstream partition wall and the downstream partition wall opened at the lower side, only the water content can be circulated between the first separation tank, the second separation tank, and the preliminary tank.
Moreover, a liquid tank can also be made movable by the some caster provided in the bottom part.

Further, the first separation tank is provided with a first aeration for collecting oil to the first adsorption drum by a gas blown into the first separation tank, and the second separation tank has the second separation tank. There may be provided a second aeration for collecting oil to the second adsorption drum by a gas blown into the tank.
In this case, the concentration of the oil to be recovered can be further increased by providing each separation tank with aeration for collecting the oil on each adsorption drum.

Further, the rotation speeds of the first suction drum and the second suction drum can be adjusted, respectively, and the rotation speed of the second suction drum is set slower than the rotation speed of the first suction drum. In addition, an air blow may be provided on the outer periphery of the second adsorbing drum so as to remove water from the oil by blowing a gas onto the oil adhering to the outer periphery.
In this case, the first suction drum can be rotated quickly to perform rough scraping with the first blade, and the scraping amount (oil recovery amount) can be increased by the first stage scraping. Further, the second suction drum is rotated slowly to make it easier for oil to be adsorbed and moisture to fall, and the second blade scrapes off the oil with high accuracy. In combination with this, the concentration of the oil scraped off by the second blade can be further increased by using air blow.

Hereinafter, embodiments of the floating oil recovery apparatus will be described with reference to the drawings.
As shown in FIG. 1, the floating oil recovery apparatus 1 of the present example aims to secure the recovery amount of the oil component O and improve the recovery concentration of the oil component O by performing adsorption and scraping of the oil component O in two stages. It is.
The floating oil recovery apparatus 1 includes a first separation tank 21, a first adsorption drum 22, a first aeration 23, and a first blade 24 in order to perform first-stage adsorption / scraping. The floating oil recovery apparatus 1 includes a second separation tank 31, a second adsorption drum 32, a second aeration 33, and a second blade 34 in order to perform the second stage adsorption / scraping.

  The first separation tank 21 is configured to receive the contaminated liquid L containing the oil component O in the water-soluble component W and to float the oil component O with respect to the water-soluble component W and store it. The first adsorbing drum 22 is configured to rotate around a horizontal axis of rotation, so that the lower part of the outer periphery is immersed in the contaminated liquid L in the first separation tank 21 to deposit the oil component O. The first aeration 23 is configured to collect the oil component O to the first adsorption drum 22 by the air blown into the first separation tank 21. The first blade 24 is arranged with a predetermined gap 241 around the outer periphery of the first suction drum 22, and is configured to scrape off the oil component O adhering to the outer periphery of the first suction drum 22.

  The second separation tank 31 is configured to receive the oil component O scraped off by the first blade 24 and to float the oil component O with respect to the water-soluble component W and store it. The second adsorbing drum 32 is configured to rotate around a rotation axis in the horizontal direction, so that the lower part of the outer periphery is immersed in the contaminated liquid L in the second separation tank 31 and the oil component O is adhered thereto. The second aeration 33 is configured to collect the oil component O to the second adsorption drum 32 by air blown into the second separation tank 31. The second blade 34 is arranged with a predetermined gap on the outer periphery of the second suction drum 32, and is configured to scrape off the oil component O adhering to the outer periphery of the second suction drum 32.

Hereinafter, the floating oil recovery apparatus 1 of this example will be described in detail with reference to FIG.
The floating oil recovery apparatus 1 purifies water-soluble coolant used as a coolant for machine tools and the like as a contaminated liquid L. The water-soluble coolant contains a functional component that is water-soluble with respect to water. The contaminated liquid L can also be a water-soluble cleaning liquid used to remove chips and the like from parts that have been subjected to cutting or the like. The floating oil recovery device 1 is composed of lubricating oil used in machine tools, sliding oil, oil-based coolant mixed from the previous process, and water-soluble coolant (contaminated liquid L) in which oil adhering to the workpiece is mixed as oil O. Used to remove oil O.

  As shown in FIG. 1, the floating oil recovery apparatus 1 of this example is formed in a liquid tank 11 configured to be movable by a plurality of casters 15. In the liquid tank 11, a first separation tank 21 and a second separation tank 31 are formed, and a next preliminary tank 41 and an overflow tank 42 are also formed. The 1st separation tank 21 and the 2nd separation tank 31 are partitioned off by the downstream partition wall 13 which forms the opening part 131 below, and are mutually connected below. The preliminary tank 41 is formed adjacent to the first separation tank 21, and is partitioned from the first separation tank 21 by the upstream partition wall 12 that forms an opening 121 below the first separation tank 21. It communicates in the lower part. The first blade 24 is provided on the upper part of the downstream partition wall 13. The second blade 34 is provided on the side wall 111 of the liquid tank 11.

The overflow tank 42 is formed adjacent to the spare tank 41 and is partitioned from the spare tank 41 by an adjustment wall 411 capable of adjusting the height. The adjustment wall 411 is provided so as to be movable up and down with respect to the upper portion of the fixed wall 14 erected from the bottom of the liquid tank 11.
The 1st aeration 23 is provided in the bottom part near the upstream partition wall 12 in the 1st separation tank 21, and it is comprised so that air may be blown out upwards from this bottom part. The flow caused by the air blown out in the vicinity of the upstream partition wall 12 does not spread to the upstream partition wall 12 side. Thereby, the oil component O which floats to the upper layer part of the contaminated liquid L in the 1st separation tank 21 can be brought close to the 1st adsorption | suction drum 22 side located in the opposite side to the upstream partition wall 12. FIG.
The 2nd aeration 33 is provided in the bottom part near the downstream partition wall 13 in the 2nd separation tank 31, and is comprised so that air may be blown out upwards from this bottom part. The flow of the air blown out in the vicinity of the downstream partition wall 13 does not spread to the downstream partition wall 13 side. Thereby, the oil component O which floats to the upper layer part of the contaminated liquid L in the 2nd separation tank 31 can be brought close to the 2nd adsorption | suction drum 32 side located in the opposite side to the downstream partition wall 13. FIG.

  As shown in FIG. 1, a coolant tank 51 for storing water-soluble coolant is provided outside the liquid tank 11 constituting the floating oil recovery apparatus 1. The coolant tank 51 is formed as a part of a machine tool or the like. The floating oil recovery apparatus 1 is disposed in the coolant tank 51 and has an inflow container portion 511 for allowing the upper layer portion of the contaminated liquid L to flow. A pumping pump 52 is disposed in the inflow container portion 511, and the upper layer portion of the coolant that has flowed into the inflow container portion 511 is supplied to the first separation tank 21 as the contaminated liquid L by the pumping pump 52. The

The reserve tank 41 is supplied with the water content W from the opening 121 below the upstream partition wall 12, and the overflow tank 42 gets over the upper end of the adjustment wall 411, and the water content W flows from the reserve tank 41. The overflow tank 42 is provided with a return side pump 53, and the water return W is returned to the coolant tank 51 by the return side pump 53.
In addition, an oil tank 54 that receives the oil O scraped off by the second blade 34 is provided outside the liquid tank 11 constituting the floating oil recovery apparatus 1.

The rotation speed of the first suction drum 22 and the second suction drum 32 can be adjusted. The motor that drives the first suction drum 22 and the motor that drives the second suction drum 32 are configured to rotate the suction drums 22 and 32 at a predetermined rotational speed using the inverter 55 separately. . Depending on the setting of each inverter 55, the rotation speed of the second suction drum 32 is set slower than the rotation speed of the first suction drum 22.
The outer periphery of each suction drum 22, 32 is formed of aluminum. Further, an air blow 35 is provided on the outer periphery of the second adsorption drum 32 to blow the air onto the oil component O adhering to the outer periphery and remove the water-soluble component W from the oil component O. The air blow 35 is provided in the second suction drum 32 at a position on the upstream side exposed to the outside of the contaminated liquid L in a state of blowing air downward.

Next, a method for recovering the oil component O from the contaminated liquid L using the floating oil recovery apparatus 1 will be described.
As shown in FIG. 1, in the floating oil recovery apparatus 1, the contaminated liquid L is supplied from the coolant tank 51 to the first separation tank 21 in the liquid tank 11 by the pumping pump 52. The position of the liquid level of the contaminated liquid L in the first separation tank 21, the second separation tank 31 and the spare tank 41 is determined by the height of the adjustment wall 411. The aqueous solution W that has passed over the adjustment wall 411 and overflowed from the preliminary tank 41 to the overflow tank 42 is returned to the coolant tank 51 by the return pump 53.

In the floating oil recovery apparatus 1, the first suction drum 22 and the second suction drum 32 are rotated. At this time, the rotation speed of the second suction drum 32 is made slower than that of the first suction drum 22.
In the contaminated liquid L in the first separation tank 21, the oil component O floats on the water-soluble component W due to the difference in specific gravity. In the first separation tank 21, air is blown out from the first aeration 23. The oil component O in the first separation tank 21 is collected toward the first adsorption drum 22 by the air blown out from the first aeration 23. Then, the oil component O is adsorbed on the outer periphery of the first adsorption drum 22, and the oil component O is extracted to the upper portion of the outer periphery of the first adsorption drum 22 that is taken out from the water-soluble component W.

Next, as shown in FIG. 1, when the oil component O in the upper portion of the outer periphery contacts the first blade 24, the oil component O is scraped off by the first blade 24 and supplied to the second separation tank 31. At this time, the first blade 24 scrapes off the oil component O without contacting the outer periphery of the first suction drum 22. Further, the water-soluble component W remaining in the oil component O can fall from the gap 241 between the first suction drum 22 and the first blade 24 because the specific gravity of the water-soluble component W is larger than the specific gravity of the oil component O or the like.
In the second separation tank 31, the concentration of the oil component O floating on the water-soluble component W is increased by the oil component O supplied from the first blade 24. Also in the second separation tank 31, air is blown out from the second aeration 33. The oil component O in the second separation tank 31 is collected toward the second adsorption drum 32 by the air blown out from the second aeration 33.

  Then, the oil component O having a high concentration is adsorbed on the outer periphery of the second adsorption drum 32, and this oil component O is extracted from the water-soluble component W to the upper portion of the outer periphery of the second adsorption drum 32. It is. Next, when the oil component O in the upper portion of the outer periphery comes into contact with the second blade 34, the oil component O is scraped off by the second blade 34 and collected in the oil component tank 54. At this time, the second blade 34 scrapes off the oil component O without contacting the outer periphery of the second suction drum 32. Further, the water-soluble component W remaining in the oil component O can fall from the gap between the second adsorption drum 32 and the second blade 34 because the specific gravity of the water-soluble component W is larger than the specific gravity of the oil component O.

The oil O recovered in the oil tank 54 can be further purified by a deep-layer adsorption purification device or the like and reused as lubricating oil or the like.
Further, the water content W in the liquid tank 11 flows from the second separation tank 31 to the first separation tank 21 through the opening 131 in the lower part of the downstream partition wall 13, and the opening in the lower part of the upstream partition wall 12. Flows from the first separation tank 21 to the reserve tank 41 through 121.

In this way, the floating oil recovery apparatus 1 further increases the concentration of the scraped oil component O by causing the second suction drum 32 to absorb and scrape off the oil component O absorbed and scraped by the first suction drum 22. can do. Further, in each of the suction drums 22 and 32, the blades 24 and 34 scrape off the oil component O in a non-contact manner. This eliminates the need for replacement / adjustment of the blades 24 and 34 and the suction drums 22 and 32 due to wear.
In general, it is considered that when the gaps 241 and 341 are provided between the blades 24 and 34 and the suction drums 22 and 32, the amount of oil O recovered is reduced. However, if the blades 24 and 34 are in contact with the suction drums 22 and 32, the water content W is also scraped off when the oil content O adhering to the outer periphery of the suction drums 22 and 32 is scraped off.

  Therefore, in the floating oil recovery apparatus 1, gaps 241 and 341 are provided between the blades 24 and 34 and the suction drums 22 and 32, while the blades 24 and 34 and the suction drums 224 and 32 are provided in two stages. In addition, the recovered amount of the oil component O can be secured, and the concentration of the recovered oil component O can be increased. As a secondary effect of providing the gaps 241 and 341, replacement and adjustment of the blades 24 and 34 and the suction drums 22 and 32 due to wear can be eliminated. In addition, by providing the separation tanks 21 and 31 with aerations 23 and 33 for collecting the oil component O to the adsorption drums 22 and 32, it is possible to further promote the increase in concentration of the recovered oil component O.

  Therefore, according to the floating oil recovery apparatus 1, it is possible to recover the oil component O at a high concentration by securing the recovery amount, and it is unnecessary to replace and adjust the blades 24 and 34 and the suction drums 22 and 32 due to wear. be able to.

DESCRIPTION OF SYMBOLS 1 Floating oil recovery apparatus 21 1st separation tank 22 1st adsorption drum 23 1st aeration 24 1st blade 31 2nd separation tank 32 2nd adsorption drum 33 2nd aeration 34 2nd blade L Contamination liquid O Oil content W Water content

Claims (4)

A first separation tank for receiving a contaminated liquid containing an oil component in a water-soluble component, and storing the oil component in a floating manner with respect to the water-soluble component;
A first adsorbing drum that rotates about a rotation axis directed in the horizontal direction, and dipping the lower portion of the outer periphery in the contaminated liquid in the first separation tank to attach an oil component;
A first blade disposed on the outer periphery of the first suction drum with a predetermined gap, and scraping off the oil adhering to the outer periphery of the first suction drum;
A second separation tank that receives the oil scraped off by the first blade and floats and stores the oil with respect to the water;
A second adsorbing drum that rotates around a horizontal axis of rotation and dipping the lower part of the outer periphery in the contaminated liquid in the second separation tank to attach oil;
A floating oil recovery apparatus, comprising: a second blade disposed on the outer periphery of the second suction drum with a predetermined gap and scraping off the oil adhering to the outer periphery of the second suction drum. In the floating oil recovery apparatus according to claim 1, the first separation tank and the second separation tank are formed by being partitioned by a downstream partition wall having a lower opening in one liquid tank,
The liquid tank includes a preliminary tank adjacent to at least one of the first separation tank and the second separation tank in a state of being partitioned by an upstream partition wall having an opening at the bottom, and an adjustment wall capable of adjusting the height. A floating oil recovery apparatus, wherein an overflow tank adjacent to the preliminary tank is formed in a state of being partitioned by. The floating oil recovery apparatus according to claim 1 or 2, wherein the first separation tank is provided with a first aeration for collecting oil into the first adsorption drum by a gas blown into the first separation tank.
The floating oil recovery apparatus according to claim 2, wherein the second separation tank is provided with a second aeration for collecting oil to the second adsorption drum by a gas blown into the second separation tank. In the floating oil recovery apparatus according to any one of claims 1 to 3, the first suction drum and the second suction drum can each be adjusted in rotational speed,
The rotational speed of the second suction drum is set slower than the rotational speed of the first suction drum,
The floating oil recovery apparatus according to claim 1, wherein an air blow is provided on the outer periphery of the second adsorption drum to blow a gas onto the oil adhering to the outer periphery to remove water from the oil.

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