JP2005342625A - Liquid separating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid separating apparatus with high separation accuracy that is capable of rapidly separating a mixture liquid without agitating the mixture liquid during the process of separation by supplying the mixture liquid into the opening part of a tubular part member. <P>SOLUTION: The mixture liquid having a lubricating oil dropped from a die casting machine and a releasing agent mixed with each other is supplied into a first separation tank 4 through a recovery tank 2 and a storing tank 3. The first separation tank is divided into a first to a fourth spaces 4A-4D by a first to a third diaphragm 11-13. The tubular part member 22 having the opening parts up and down is established in the first space among these on which the mixed liquid falls. The mixture liquid is established so that it falls within a range of the upper opening part in the tubular part member. Thus, the mixture liquid is separated into the lubricating oil and the primary separated liquid until reaching a fourth separation tank and the primary separated liquid is supplied into the second separation tank 5 through a first and second separation liquid recovery passages 19, 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid separation device, and more particularly, to a liquid separation device that separates a mixed liquid in which liquids having different specific gravity are mixed into a liquid having a low specific gravity and a liquid having a high specific gravity.

Today, in various fields such as the manufacturing industry, a mixture of liquids with different specific gravity discharged is separated into a light liquid with a specific gravity and a liquid with a high specific gravity. Such a liquid separation apparatus is known.
As such a liquid separator, emulsion-type rolling oil as a mixed liquid discharged from the rolling equipment is supplied to a clean tank as a separation tank, and these are used as a rolling oil having a high specific gravity and a floating oil having a low specific gravity. Once separated, only the usable rolling oil was removed and returned to the rolling facility. (Patent Document 1)
JP 2000-262808 A

However, in Patent Document 1, the emulsion-type rolling oil is dropped into the clean tank 6 through the filter 5 provided above the clean tank 6. Despite being separated into usable rolling oil and floating oil, new emulsion-type rolling oil is supplied from above.
As a result, the liquid level of the clean tank 6 was agitated by the new emulsion-type rolling oil, and the emulsion-type rolling oil could not be separated promptly.
Further, in Patent Document 1, the rolling oil in the clean tank 6 is supplied to the rolling equipment 1 by the spray pump 7, but the rolling oil in the clean tank 6 is in a state containing a fine scum and separated. The accuracy is low.
In view of such a problem, the present invention provides a liquid separation apparatus in which separation of the mixed solution is not hindered by the mixed solution supplied from above and the separation accuracy of the mixed solution is high.

The liquid separation apparatus according to the present invention is a liquid separation apparatus that supplies a liquid mixture in which liquids having different specific gravities are mixed to a separation tank, and separates the liquid mixture into a liquid having a low specific gravity and a liquid having a high specific gravity.
While providing a cylindrical member with openings on the top and bottom inside the separation tank, the upper opening in the cylindrical member protrudes above the liquid level of the liquid mixture,
By supplying the mixed liquid into the upper opening, the mixed liquid is supplied into the separation tank from the lower opening of the cylindrical member.

  According to the above invention, the liquid mixture supplied from above falls into the opening of the cylindrical member protruding upward from the liquid level of the separation tank, and is then supplied into the separation tank from the opening below the cylindrical member. As a result, the liquid mixture being separated located outside the cylindrical member is not stirred by the falling liquid mixture, and the liquid mixture can be separated quickly and accurately.

1 and 2 show a liquid separation apparatus 1 according to the present invention. A mixed liquid as a waste liquid discharged from a die casting machine (not shown) is separated into a lubricating oil having a low specific gravity and a heavy specific gravity. It is an apparatus for separating into molds.
The liquid separation device 1 is provided below the die casting machine and collects the mixed liquid, a storage tank 3 that temporarily stores the mixed liquid from the collecting tank 2, and the mixed liquid as lubricating oil. And first and second separation tanks 4 and 5 that are separated from each other.
The storage tank 3, the first and second separation tanks 4 and 5 are provided independently, and when moving the liquid separation device 1, the storage tank 3, the first and second separation tanks are provided. The tanks 4 and 5 can be moved individually. In this embodiment, the storage tank 3, the first and second separation tanks 4 and 5 are simply installed on a pre-set frame 6. The liquid separator 1 can be used.
Then, the mixed liquid moved from the recovery tank 2 to the storage tank 3 is separated in the first separation tank 4 into lubricating oil and a primary separating liquid as a release agent containing the lubricating oil, of which the primary separating liquid Only the second separation tank 5 is supplied, and the primary separation liquid is separated into the lubricating oil and the release agent in the second separation tank 5.

The recovery tank 2 is provided below a die casting machine (not shown). The recovery tank 2 is divided into two spaces by a filter 7, and a mixed liquid passage 8 communicating with the storage tank 3 is provided in one of the spaces. It is connected.
Of the space defined by the filter 7, the mixed liquid from the die casting machine falls into the space on the side where the mixed liquid passage 8 is not connected, and the filter 7 together with the mixed liquid. Large foreign objects such as falling metal pieces are removed.
When the large foreign matter is removed by the filter 7, the mixed liquid is then sent to the storage tank 3 through the mixed liquid passage 8.

Next, the storage tank 3 discharges the mixed liquid stored in the storage tank 3 to the first separation tank 4 through a suction pump 9 that sucks the mixed liquid from the recovery tank 2 through the mixed liquid passage 8. And a discharge passage 10 for the purpose.
The discharge passage 10 discharges the liquid mixture from below the storage tank 3, and a valve (not shown) that opens when a predetermined amount of the liquid mixture is stored in the storage tank 3 is provided in the discharge passage 10. Is provided.
Further, when the mixed liquid is temporarily stored in the storage tank 3 and part of the lubricating oil is separated and floated during that time, the lubricating oil is recovered by a recovery means (not shown).

The first separation tank 4 will be described. First, the first separation tank 4 is partitioned into first to fourth spaces 4A to 4D by first to third partition plates 11 to 13, and is supplied into the first space 4A. In the mixed liquid, most of the lubricating oil floats between the first to third spaces 4A to 4C, and only the primary separated liquid from which most of the lubricating oil is separated from the mixed liquid remains in the fourth space 4D. It is like that.
Further, notches 14 to 16 are formed in the first to fourth spaces 4A to 4D, respectively, and the notches 15 of the second and third spaces 4B and 4C are common to both spaces. And the position of the bottom of each notch 14-16 is unified, and the position of the liquid level in the 1st separation tank 4 is prescribed | regulated by the position of the bottom of the said notch 14-16.
A lubricating oil recovery passage 17 is provided outside the first separation tank 4 in accordance with the positions of the notches 14 and 15, and the lubricating oil separated and floated overflows from the notches 14 and 15. At this time, the lubricating oil is recovered.
On the other hand, a first separation liquid recovery passage 18 for recovering the primary separation liquid is provided at the position of the notch 16 in the fourth space 4D, and a discharge port 19 is provided on the lower side of the fourth space 4D. The discharge port 19 is provided with a second separation liquid recovery passage 20 for recovering the primary separation liquid.

The first to third partition plates 11 to 13 are provided so as to protrude above the liquid level in the first separation tank 4, and among these, the lower ends of the first and third partition plates 11 and 13 and the first ones. A predetermined space is provided between the bottom surface of the one separation tank 4 and communication ports 11 a and 13 a are formed.
On the other hand, the second partition plate 12 is provided up to the bottom surface of the first separation tank 4, and a communication port 12 a is formed in the second partition plate 12 above the bottom surface by a predetermined distance, and the second space is formed by the communication port 12 a. 4B and the third space 4C communicate with each other.
The lubricating oil recovery passage 17 is fixed to the outside of the first separation tank 4 in accordance with the positions of the notches 14 and 15 in the first to third spaces 4A to 4C. The overflowing lubricating oil flows downstream along the slope provided in the lubricating oil recovery passage 17 and is recovered in a recovery tank 21 provided adjacent to the first separation tank 4.
The second separation liquid recovery passage 20 is a pipe connected to a discharge port 19 provided below the fourth space 4D, and discharges a heavy primary separation liquid from the discharge port 19, The second separation tank 5 is supplied.
Here, the position of the discharge port 19 is preferably as low as possible below the fourth space 4D. However, in consideration of the possibility that foreign matters in the mixed liquid accumulate on the bottom of the fourth space 4D, the first separation tank. It is desirable to form it slightly above the bottom surface of 4.
Further, the first separation liquid recovery passage 18 is provided at a position of the notch 16 formed in the fourth space 4D, and the primary separation liquid overflowing from the notch 16 is removed from the first separation liquid recovery passage. It flows downstream along the slope provided in 18 and is supplied to the second separation tank 5.

And in the said 1st space 4A in the 1st separation tank 4 of a present Example, the cylindrical member 22 of the cross-sectional rectangle which has an opening part in the upper and lower ends is provided.
The upper opening in the cylindrical member 22 is located above the bottom position of the notches 14 to 16, and the upper opening always protrudes above the liquid level in the first separation tank 4. It is like that. On the other hand, the lower opening is provided so as to open into the mixed liquid, and is positioned below the communication port 12a of the second partition plate 12.
The upper opening of the cylindrical member 22 is located directly below the discharge port in the mixed liquid passage 8, and the mixed liquid from the storage tank 3 falls into the opening.

Next, the second separation tank 5 is provided at a position lower than the first separation tank 4, and the second separation tank 5 is partitioned into fifth and sixth spaces 5A and 5B by the fourth partition plate 31. Has been.
The fourth partition plate 31 is provided so as to protrude above the liquid level of the second separation tank 5, and the fourth partition plate 31 is similar to the second partition plate 12 in the second separation tank 5. While being formed up to the bottom surface, the fifth and sixth spaces 5A and 5B communicate with each other by a communication port 14a formed a predetermined distance above the bottom surface.
In the fifth space 5A of the second separation tank 5, similarly to the first separation tank 4, the second cylindrical member 32 is provided, and the sixth space 5B floats in the separated release agent. Lubricating oil collecting means 33 for removing the lubricating oil, a level sensor 34 for detecting the level of the liquid level in the second separation tank 5, and a release agent in the sixth space 5B are sent to a release agent reservoir tank (not shown). A liquid feed pump 35 for liquid is provided.
Similar to the cylindrical member 22, the second cylindrical member 32 is provided such that the upper opening projects from the liquid level in the second separation tank 5, and the lower opening is below the communication port 14a. positioned.
The lubricating oil recovery means 33 scrapes off a conveyor belt having one end protruding below the liquid level of the sixth space 5B and the other end protruding above the liquid level, and the lubricating oil adhering to the conveyor belt (not shown). And a scraping member for collecting a small amount of lubricating oil contained in the release agent in the sixth space 5B.
The level sensor 34 includes a float 36 that floats in the release agent, a pressing member 38 that is provided above the float 36 via a connecting member 37, and a limit switch 39 that detects the rise of the pressing member 38. The liquid feed pump 35 is controlled by the limit switch 39.
The liquid feed pump 35 is activated when the limit switch 39 is turned on. The liquid feed pump 35 sucks the release agent from the bottom surface side of the sixth space 5B, and then sucks the release agent via the liquid feed passage 40. The liquid is sent to the tank.

The operation of the liquid separating apparatus 1 having the above configuration will be described below. First, in the die casting machine, the release agent injected toward the mold is mixed with the lubricating oil of the die casting machine. While being dropped, it is collected in the collection tank 2 together with the metal pieces falling from the released article or the like.
In the collection tank 2, large metal pieces are collected by the filter 7, and then the mixed solution is sucked into the suction pump 9 provided in the storage tank 3 and flows into the storage tank 3 to be temporarily stored.
When a predetermined amount of the liquid mixture is stored in the storage tank 3, the valve of the discharge passage 10 is opened, and the liquid mixture is supplied from the discharge passage 10 to the first separation tank 4. At this time, the liquid mixture is mixed in the storage tank 3. When the lubricating oil in the liquid separates and floats, the lubricating oil is recovered by the recovery means provided in the storage tank 3.
The mixed liquid discharged from the discharge passage 10 falls into the opening of the cylindrical member 22 provided in the first separation tank 4, and then the mixed liquid passes through the opening below the cylindrical member 22 in the first space 4 </ b> A. Flows in.
At this time, in the present embodiment, the liquid mixture is dropped into the opening of the cylindrical member 22, and the upper opening is protruded from the liquid surface, so that the liquid in the first space 4A located outside the opening The surface is not agitated, and the separation of the lubricating oil from the liquid mixture in the first space 4A is not hindered, and the liquid mixture can be separated quickly and accurately.

Thereafter, the lubricating oil having a low specific gravity separates and floats from the mixed liquid flowing into the first space 4A, and most of the lubricating oil is transferred while moving from the first space 4A to the third space 4C. It floats above the first to third spaces 4A to 4C.
When the level of the lubricating oil reaches the notches 14 and 15, the lubricating oil overflows from the notches 14 and 15 and is recovered in the recovery tank 21 through the lubricating oil recovery passage 17.
Only the primary separation liquid from which most of the lubricating oil has been removed flows into the fourth space 4D, and this primary separation liquid overflows from the notch 16 and passes through the first separation liquid recovery passage 18. The primary separation liquid supplied to the second separation tank 5 and discharged from the discharge port 19 formed in the fourth space 4D is supplied to the second separation tank 5 through the second separation liquid recovery passage 20. .
At this time, the lower opening of the cylindrical member 22 is made lower than the position of the communication port 12a of the second partition plate 12, so that the metal powder is heavier than the release agent contained in the mixed liquid, etc. The foreign matter settles in the lower part of the first separation tank 4 and does not move to the third and fourth spaces 4C and 4D beyond the communication port 12a formed in the second partition plate. It is prevented that these foreign substances are included.

Thus, the primary separation liquid separated in the first separation tank 4 is opened in the second cylindrical member 32 provided in the second separation tank 5 by the first and second separation liquid recovery passages 19 and 20. The supplied primary separation liquid flows into the fifth space 5 </ b> A from below the second cylindrical member 32.
In the fifth space 5A of the second separation tank 5, the lubricating oil remaining in the primary separation liquid is separated, and the resulting release agent flows into the sixth space 5B.
Even at this time, the cylindrical member 22 is not agitated by the primary separation liquid in which the liquid level of the fifth space 5A falls, so that the lubricating oil can be quickly and accurately separated from the primary separation liquid. The communication port 14a formed in the fourth partition plate 14 prevents foreign matters in the primary separation liquid from flowing into the sixth space 5B.
Since a small amount of lubricating oil that has not yet floated floats in the release agent that has moved to the sixth space 5B in this way, the lubricating oil is collected by the lubricating oil collecting means 33.
Then, when the liquid level of the second separation tank 5 rises, and the float 36 of the level sensor 34 rises and the pressing member 38 comes into contact with the limit switch 39, the liquid feed pump 35 is activated, and the release agent is precipitated. The release agent is sucked up from below the second separation tank 5 and is sent to the release agent reservoir tank via the liquid supply passage 40.
In the release agent reservoir tank, a new release agent is additionally mixed with the collected release agent to adjust the release agent concentration, and this is sent to each die casting machine. The mold release agent concentration in the present example shows a substantially constant concentration within the range of the dilution ratio of 80 to 100 times during repeated use, so that the release agent concentration can be easily maintained and managed.
Furthermore, the additional amount of the release agent may be sufficient to compensate for the amount separated with the lubricating oil and the deterioration due to repeated use. Therefore, in this embodiment, the consumption of the release agent is also large. Can be reduced.

As described above, the cylindrical members 22 and 32 are provided in the first and second separation tanks 4 and 5, respectively, and the mixed liquid or the primary separation liquid is supplied to the cylindrical members 22 and 32. Thus, the lubricating oil is not stirred by these, and the liquid can be separated quickly and accurately.
In addition, by providing the second and fifth partition plates 12 and 31 with communication ports 12a and 31a above the bottom surfaces of the first and second separation tanks 4 and 5, It is possible to prevent foreign matters from being included in the primary separation liquid and release agent after separation.
Furthermore, since the first and second separation liquid recovery passages 18 and 20 are provided in the fourth space 4D, the primary separation liquid overflowing from the notch 16 of the fourth space 4D and the lower side of the fourth space 4D. The primary separation liquid can be collected at the same time, and the primary separation liquid can be efficiently collected.
Further, when the liquid separation apparatus 1 is moved, the storage tank 3, the first and second separation tanks 4 and 5 are small and can be moved individually, and are installed for each die casting machine. As a result, the cost of the equipment can be greatly reduced.
Furthermore, even when the release agent is used repeatedly, it is easy to maintain and manage the release agent concentration, and the consumption of the release agent can be greatly reduced.

  The mixed liquid is not limited to the combination of the lubricating oil and the release agent, and any other mixed liquid with different specific gravity can be used, and the number of partition plates and separation tanks can be used. It goes without saying that the number is not limited to the number and number of the present embodiment, and can be appropriately increased or decreased according to the separation speed of the mixed liquid.

The side view regarding the liquid separator concerning a present Example. The top view about the said liquid separator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid separation apparatus 4 1st separation tank 4A-4D 1st-4th space 5 2nd separation tank 5
5A, 5B Fifth and sixth spaces 11-13 First to third partition plates 11a-13a Communication port 17 Lubricating oil recovery passage 18 First separation liquid recovery passage 20 Second separation liquid recovery passage 22 Cylindrical member 31 Fourth Divider

Claims (5)

In a liquid separation apparatus for supplying a mixed liquid in which liquids having different specific gravities are mixed to a separation tank and separating the liquid mixture into a liquid having a low specific gravity and a liquid having a high specific gravity.
While providing a cylindrical member with openings on the top and bottom inside the separation tank, the upper opening in the cylindrical member protrudes above the liquid level of the liquid mixture,
A liquid separation apparatus, wherein the mixed liquid is supplied into the separation tank from the lower opening of the cylindrical member by supplying the mixed liquid into the upper opening. The separation layer is partitioned into a plurality of spaces by a partition plate having a communication port, and the cylindrical member is provided in one of the spaces, and the other space where the cylindrical member is not provided Providing a first recovery passage for recovering the liquid overflowing from the space and a second recovery passage for recovering the liquid discharged from the discharge port formed below the liquid surface of the other space;
The liquid having a higher specific gravity than the liquid mixture is separated in the one space, and the liquid having the higher specific gravity is caused to flow into the other space where the cylindrical member is not provided through the communication port. 2. The liquid separation device according to claim 1, wherein the liquid is recovered by the first and second recovery passages.   A predetermined gap is provided between the communication port formed in the partition plate and the bottom surface of the separation tank, and the precipitate in the liquid mixture that has settled in the one space flows into the other space by the partition plate. The liquid separation device according to claim 2, wherein the liquid separation device is prevented. While providing another separation tank at a position adjacent to the separation tank, a cylindrical member provided with openings in the upper and lower sides in the other separation tank,
The upper opening of the cylindrical member protrudes above the liquid level of the mixed liquid, and the liquid having a high specific gravity separated by the separation tank is supplied into the upper opening. The liquid separator according to any one of claims 1 to 3.   The liquid separation apparatus according to claim 4, wherein each separation layer is provided independently and is movable for each separation tank.

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