JP5099734B2 - Liquid mixture separator - Google Patents

Description

  The present invention relates to an apparatus for separating a specific liquid from a mixed liquid composed of two or more kinds of liquids having different specific gravities such as a factory waste liquid.

  In the steel industry and the metal processing industry, a water-soluble machining fluid generally called a coolant is supplied to a machining site for cooling a workpiece, improving lubricity, removing chips, and preventing corrosion. In addition, since machine oil or the like is used for surface lubrication or mechanical lubrication during processing, a part of it leaks along with the processing, and is mixed into the coolant together with cutting dust such as metal powder, peeling abrasive powder, and bond. In order to reuse such a mixed liquid as a coolant, various apparatuses have been conventionally used.

  In general, in order to remove chips, cutting residue, and the like, for example, a filtration device described in Patent Document 1 is used in addition to a magnetic separator and a paper filter. The filtration device of Patent Document 1 fills a filtration tank with chips adhering to an amorphous thin film oil film obtained by dry-cutting a metal, and allows a grinding liquid containing grinding dust to pass through the filtration tank. Since the grinding dust adheres and accumulates on the chip using an oil film as an adhesive medium, the grinding dust is removed from the grinding liquid.

  On the other hand, since the machine oil mixed in the coolant cannot be removed by the above filtration device, if the used coolant is stored in a tank or the like, the oil will rise to the liquid level due to the difference in specific gravity, and eventually the entire liquid level of the tank will be removed. It comes to cover. When floating oil is generated, the contact between the coolant and air is broken. As a result, there is a problem that the decay of the coolant due to the growth of anaerobic bacteria progresses and a bad odor such as amine, ammonia, mercaptan and hydrogen sulfide is generated.

Therefore, an oil skimmer is known as a typical device for collecting floating oil. A belt skimmer, one of the oil skimmers, continuously rotates an endless belt stretched between a driving pulley disposed above a tank of used coolant liquid and a driven pulley immersed in the liquid in the tank. As a result, the floating oil is continuously adhered to the surface of the belt and sent out of the tank. However, the belt skimmer requires a driving device, and the recovered floating oil contains a large amount of coolant, so that further separation work is required.
JP 2002-224959 A

  In view of the above problems, the present invention can efficiently separate a specific liquid from a mixed liquid composed of two or more kinds of liquids having different specific gravities, and can further suppress the spoilage of the specific liquid. An object is to provide a new apparatus.

The mixed liquid separation device of the present invention is provided with a separation chamber that is supplied with a mixed liquid composed of two or more liquids having different specific gravities and separates a specific liquid from the mixed liquid due to a difference in specific gravity, and below the liquid level of the mixed liquid. A recovery chamber having a discharge means that communicates with the separation chamber at the position of the separation chamber and discharges the specific liquid received from the separation chamber, and the separation container is filled with the mixed liquid in the separation container. A flow rate slowing material that slows down the moving speed, and the flow rate slowing material is a chip material made of chips produced by cutting, and is filled so as to be exposed from the liquid level in the separation chamber. The recovery chamber is filled or not filled so as to be lower than the liquid level.

  The discharge means is preferably a discharge port that is formed in the recovery chamber and discharges the liquid in the liquid surface portion. The separation chamber has a plurality of compartment spaces in which the internal space of the separation container is partitioned in a direction intersecting the liquid surface by a partition plate having a communication hole in which two adjacent ones communicate with each other at a position below the liquid surface. It is preferable to have one or more of them.

  The area of the liquid surface formed in the recovery chamber is preferably 10 to 70% of the total area of the liquid surface formed in the separation container.

  In the mixed liquid separation device of the present invention, the specific liquid is slowly separated from the mixed liquid by the flow rate slow material filled in the separation container. In the separation chamber, the flow rate slow-down material is filled so as to be exposed from the liquid surface, so that the liquid having a small specific gravity separated from the mixed liquid by the specific gravity difference and floated on the liquid surface becomes the flow rate slow-down material at the liquid surface part. A stable liquid level that adheres and does not flow is maintained. As a result, the specific liquid is satisfactorily separated from the liquid mixture and received in the collection chamber. Since the liquid having a small specific gravity is slowly separated in the separation chamber, most of the liquid received in the collection chamber is a specific liquid. Even if a liquid with a small specific gravity floats on the liquid level in the recovery chamber, the liquid flowing up does not adhere to the flow rate slowing material because the flow rate slowing material is filled below the liquid level in the recovery chamber. It is difficult to form a stable liquid surface that does not flow. Therefore, in the recovery chamber, a lot of liquid level that is not covered with the floated liquid is formed.

  If many liquid surfaces covered with a liquid having a small specific gravity are formed on the liquid surface of the separation container, as described above, anaerobic bacteria may propagate in the specific liquid and the rot may proceed. If many portions that are not covered with the liquid floating on the liquid surface are formed, the area in which the specific liquid and the air are in direct contact with each other increases, so that the decay of the specific liquid is reduced.

  If a discharge port that discharges the liquid at the liquid level is formed in the recovery chamber, even if liquid with a small specific gravity mixed in the specific liquid received in the recovery chamber rises to the liquid level, it is discharged sequentially from the discharge port. Therefore, it is possible to prevent the liquid surface from being covered with a liquid having a small specific gravity.

  Further, if the separation chamber has a plurality of partition spaces, the ability to separate the mixed liquid in the separation chamber is improved.

  If the area of the liquid surface formed in the recovery chamber is 10 to 70% of the total area of the liquid surface formed in the separation container, a specific capacity can be obtained without reducing the ability to separate the liquid mixture in the separation chamber. Liquid spoilage is reduced well.

  The best mode for carrying out the mixed liquid separation device of the present invention will be described below.

  The mixed liquid separation apparatus of the present invention is an apparatus for separating a specific liquid from a mixed liquid composed of two or more kinds of liquids having different specific gravities based on a specific gravity difference. The mixed liquid is not particularly limited as long as it consists of two or more liquids having different specific gravities. For example, a mixed liquid of water-soluble cutting fluid (coolant) and lubricating oil such as machine oil, factory waste water, degreasing cleaning liquid, A common oil-containing waste liquid such as a cutting fluid is preferable. For example, the recovered coolant can be reused by separating and recovering the coolant as a specific liquid by the mixed liquid separation device of the present invention. In particular, in the mixed liquid of the coolant and the lubricating oil, floating oil is formed on the liquid surface and the coolant is easily rotted. Therefore, the mixed liquid separation apparatus of the present invention is suitable in terms of suppressing the rot.

  The mixed liquid separation device of the present invention mainly includes a separation container composed of a separation chamber and a recovery chamber, and a slow flow rate material filled in the separation container.

  The separation container includes a separation chamber and a recovery chamber. The separation chamber is supplied with a liquid mixture, and separates a specific liquid from the liquid mixture by a specific gravity difference. The recovery chamber communicates with the separation chamber at a position below the liquid level of the mixed liquid, and has a discharge means for discharging a specific liquid received from the separation chamber. The configuration of the separation container is not particularly limited, but the separation chamber and the collection chamber are formed of different containers and communicated by a passage such as a pipe. It may be divided into sections. In the latter case, for example, the partitioned chambers communicate with each other by forming a communication hole penetrating the partition plate.

  Although the separation container is divided into a separation chamber and a collection chamber, the configuration is the same as that of an apparatus generally called “specific gravity difference separation tank” or the like in that both communicate with each other below. Accordingly, when the liquid mixture is supplied to the separation container from the separation chamber side, the liquid level of the separation chamber and the recovery chamber that are in communication with each other coincide. The liquid having a large specific gravity is located below the separation chamber, and the recovery chamber communicating with the separation chamber is filled with the liquid having a large specific gravity.

  The partition plate preferably has a communication hole in which two adjacent ones communicate with each other at a position below the liquid level, and partitions the internal space of the separation container in a direction intersecting with the liquid level. At this time, the separation container may be partitioned into two or more partition spaces by using a plurality of partition plates. If there are a plurality of compartment spaces, each is assigned to either a separation chamber or a collection chamber. That is, it is preferable that the separation chamber and the recovery chamber have one or more of a plurality of partition spaces that are partitioned by the partition plate. Since the separation container is composed of a separation chamber and a recovery chamber, if the separation container is composed of a separation chamber having X internal spaces and a recovery chamber having Y internal spaces, if there are (X + Y) internal spaces, Good.

  There is no particular upper limit to the number of compartment spaces in the separation container, but (X + Y) is preferably 2 compartments or more and 10 compartments or less. More preferably, X (separation chamber) is 2 sections or more and 9 sections or less, and Y (recovery chamber) is 1 section or more and 3 sections or less. In particular, if the separation chamber has three or more sections, a specific liquid can be efficiently separated from the mixed solution in the separation chamber, and almost no liquid floats in the collection chamber. Moreover, although there is no limitation also in the volume and opening area of each division space, it is preferable that each division space has the same volume and opening area.

  The passages and communication holes that connect the separation chamber and the recovery chamber, and the communication holes that communicate each partition space are limited as long as the flow and the number of mixed liquids moving in each internal space are not biased. If the partition plate does not have a communication hole, the lower side of the partition plate may be opened, the left and right sides of the partition plate may be alternately opened, or a plurality of passages and communication holes may be provided. If there is no bias in the flow of the mixed liquid moving through each compartment space, the flow of the mixed liquid passing through the flow rate slowing material (described in detail later) filled in the separation container is eliminated, and a liquid having a small specific gravity is obtained. When it becomes easy to float and foreign matters such as chips and cutting waste are mixed in the mixed liquid, it is preferable because it is captured by the slow flow rate material while passing.

  A liquid mixture is supplied to the separation chamber, and a specific liquid is separated from the liquid mixture by a specific gravity difference in the separation chamber. There is no limitation on the method of supplying the mixed liquid, but the mixed liquid such as oil-containing waste liquid generated in the processing process is temporarily stored in the storage tank and continuously sent from the storage tank to the separation chamber by a pump, etc., and the mixed liquid discharged after use May be supplied directly as it is discharged. Accordingly, the supply rate of the mixed liquid is not limited, but it is preferably supplied at 1 to 100 L / min. In addition, when a separation chamber consists of several division spaces, a liquid mixture should just be supplied to any one division space. At this time, it is desirable that the air is supplied to the compartment space located farthest from the collection chamber. The supplied liquid mixture passes through the compartment space of the separation chamber in order while moving slowly to the recovery chamber while being slowly separated by a flow rate slowing material (detailed later) filled in the separation chamber.

  In the recovery chamber, a specific liquid is mainly received from the separation chamber and discharged. Since the recovery chamber communicates with the separation chamber at a position below the liquid level of the mixed liquid, the specific liquid to be recovered is a liquid having a large specific gravity among the mixed liquid. The specific liquid separated from the liquid mixture moves to the recovery chamber, but the liquid with low specific gravity that floats on the liquid surface (hereinafter abbreviated as “floating liquid”) is trapped in the slow flow rate material filled in the separation chamber. Has been. At this time, since the mixed liquid is slowly separated in the separation chamber, the specific liquid moving to the recovery chamber usually contains almost no floating liquid.

  The recovery chamber also has a discharge means for discharging the specific liquid received from the separation chamber. The discharge means is preferably a pump for sending a specific liquid from the collection chamber to the outside of the separation container, or a discharge port formed in the collection chamber for discharging the liquid surface portion. Since the liquid at the liquid level can be discharged from the discharge port by the overflow method, even if the floating liquid floats on the liquid level of the specific liquid received in the recovery chamber, it will be discharged sequentially from the discharge port. The surface of the liquid becomes difficult to be covered with the floating liquid. As a result, a liquid surface that is in direct contact with air is formed, and air is more easily dissolved in the specific liquid, so that the spoilage of the specific liquid due to the growth of anaerobic bacteria is suppressed. When the collection chamber is composed of a plurality of compartment spaces, a discharge means may be provided so that a specific liquid can be discharged from at least one compartment space. At this time, it is desirable to provide in the partition space that is located farthest from the separation chamber.

  In the separation container, the area of the liquid level formed in the recovery chamber is preferably 10 to 70% of the total area of the liquid level formed in the separation container. If the area of the liquid surface formed in the recovery chamber is 10% or more, the specific liquid can be satisfactorily prevented from decaying. Furthermore, the area of the liquid surface formed in a more preferable recovery chamber is 15% or more. Further, if it is 70% or less, it is preferable because a sufficient flow rate slow-down material is filled in the separation chamber so that the floating liquid can easily float and foreign matters mixed in the mixed liquid are easily captured. However, increasing the filling amount of the slow flow rate material leads to an increase in the capacity of the separation container, which is not desirable in terms of installation space. Therefore, the area of the liquid surface formed in a more preferable recovery chamber is 50% or less.

Moreover, it is preferable that the area of the liquid level formed in a collection | recovery chamber is 100-1000 cm < ² >. If the area of the liquid surface formed in the recovery chamber is 100 cm ² or more, it is preferable because an area where the specific liquid and air are in direct contact is sufficiently secured. If it is 1000 cm < ² > or less, the ability to isolate | separate a liquid mixture can be hold | maintained, without enlarging installation space.

  The flow rate slowing material is filled in the separation container, and slows the speed at which the mixed solution moves in the separation container. In the separation container, the flow of the supplied mixed liquid is hindered by the flow rate slowing material and becomes gentle, and the time during which the mixed liquid stays mainly in the separation chamber becomes long, so that the mixed liquid is easily separated.

  As the flow rate slowing material, for example, a material having an appropriate gap such as a material used for a filtering material can be used. The flow rate slowing material preferably has a porosity of 96 to 99% (that is, a filling rate of 1 to 4%). It is preferable that the porosity is 99% or less because the mixed solution is more slowly separated by the slower flow rate of the mixed solution and the separation ability is improved. Further, even if the porosity is less than 96%, the separation ability is not affected, but depending on the type of the flow rate slowing material, it is difficult to achieve a filling rate exceeding 4%, which is not preferable in filling work. By setting the porosity to 96 to 99%, the average flow rate of the mixed liquid becomes about 0.2 to 5 mm / second. The flow rate of the mixed liquid varies depending on the location of the separation container. The average flow velocity is calculated by dividing the supply speed of the mixed liquid by the area of the partition plate that partitions the partition space. When the average flow rate of the mixed liquid is 0.2 mm / second or more, a sufficient separation amount per unit time is secured. In order to secure a separation amount per unit time when the average flow velocity is less than 0.2 mm / second, it is necessary to increase the area of the partition plate, which is not desirable in terms of installation space. On the other hand, when the average flow rate exceeds 5 mm / second, the separation ability of the mixed solution is reduced depending on the type of the mixed solution, which is not desirable.

In the mixed liquid separation device of the present invention, a chip material made of chips generated by cutting is used as a slow flow rate material. As long as the chip material is used as the flow rate slowing material, there is no particular limitation on the type of the flow rate slowing material, but it is preferable to use waste material or waste. preferably used cuttings generated in. The chip material may be generated by dry cutting as well as normal oil cutting. Further, the shape of the chips is not particularly limited, and the chips discharged from a general cutting work site can be used as they are as a cutting material.

Specifically, a chip made of an iron-based material, an aluminum-based material, or a copper-based material is suitable as the chip material. In order to obtain a desirable filling rate (1 to 4%), 0.08 to 0.32 g / cm ^{3 for} a chip made of an iron-based material, and 0.03 to 0.11 g / cm for a chip made of an aluminum-based material. ^It is better to use a chip material with a packing density of ³ . However, when copper-based materials such as brass are used as the cutting material, antibacterial action due to copper ions is expected, but depending on the type of the liquid mixture, the specific liquid may deteriorate or the specific liquid after separation may be reused. When used, there are problems such as accelerating the corrosion of processing machines and workpieces.

  In the separation chamber, the flow rate slow-down material is filled so as to be exposed from the liquid level of the mixed liquid supplied to the separation container. By filling the flow velocity gradual material so as to be exposed from the liquid surface, the floating liquid clings to the flow velocity gradual material and the flow of the liquid surface portion is inhibited, so that a stable floating liquid layer is formed on the liquid surface portion. In addition, since the formation state of the floating liquid layer is easily confirmed by visual observation, it is easy to determine when to replace the flow rate slowing material with a new one. There is no particular limitation on the exposure amount of the flow rate gradual material in the separation chamber, but it is preferable to fill it so as to expose 1 to 3 cm from the liquid surface. When the exposure amount is 1 to 3 cm, the flow of the liquid surface portion is inhibited and the formation state of the floating liquid layer can be determined at a glance.

  On the other hand, in the recovery chamber, the slow flow rate material is filled so as to be lower than the liquid level of the mixed liquid supplied to the separation container. In the recovery chamber, the flow rate slowing material is filled so as to be lower than the liquid level, so that the floating liquid does not adhere to the flow rate slowing material even if floating liquid is mixed in the recovered liquid. Does not form a stable floating liquid layer like the separation chamber. As a result, there is no problem that a floating liquid layer is formed in the vicinity of the discharge port or the floating liquid is solidified on the liquid surface, so that it is easy to discharge the specific liquid received in the recovery chamber.

  In addition, when the floating liquid layer is firmly formed as in the separation chamber, a specific liquid that cannot contact with air rots. However, in the present invention, since the floating oil layer is difficult to be formed on the liquid surface of the recovery chamber, a contact portion between the specific liquid and air is partially formed in the separation container. As a result, the progress of spoilage of a specific liquid is reduced as a whole apparatus.

  In the recovery chamber, the flow rate gradual material only needs to be filled so as to be lower than the liquid level, and therefore the recovery chamber may not be filled with the flow rate gradual material. The slow flow rate material in the recovery chamber is preferably filled so as to be 1 cm or more lower than the liquid level.

  The mixed liquid separation device of the present invention described in detail above is preferably installed and used mainly at a processing site such as cutting. A mixed liquid such as a waste liquid generated in the processing step is supplied to the separation chamber. The mixed liquid supplied to the separation chamber is slowly separated due to the presence of the flow rate slow material, and a liquid having a small specific gravity floats on the liquid surface portion and adheres to the flow rate slow material. The remaining liquid moves to a recovery chamber that communicates with the separation chamber. Since most of the liquid moved to the recovery chamber is made of a specific liquid that can be reused, a circulation system that recovers this liquid and can use it again in the processing step may be used. In addition, when a separation chamber and a collection | recovery chamber consist of a some division space, a some division space is moved in order.

  When the mixed liquid separator is used for a long time, the floating liquid adheres to the slow flow rate material one after another. For this reason, the slow flow rate material needs to be replaced periodically. When replacing the flow rate slowing material, the attached floating liquid is also removed together, so that the trouble of separately removing the floating liquid by a technique such as suction can be saved.

  When the flow rate slowing material is a chip material, the chip may be put directly into the separation container, but it is preferable that the separation container is filled with the chip contained in the inner container. When the chip material is replaced by using the internal container, the replacement can be performed only by taking the internal container into and out of the separation container. The inner container is not particularly limited as long as it has a shape that can be accommodated in the inner space of the separation container, and may have a size with a clearance enough to be taken in and out. At this time, the inner container preferably has a plurality of through holes through which the mixed liquid passes. It is desirable that the plurality of through holes be formed to such an extent that the movement of the mixed liquid moving from the separation chamber to the recovery chamber or each partition space is not hindered. In addition, it is desirable that the mixed liquid easily passes when the chips are replaced, and that the liquid is easily cut off. Therefore, it is desirable that the container is an internal container having a plurality of through holes in the lower part of the container, or a container formed of a wire mesh.

  As mentioned above, although embodiment of the liquid-mixture separation apparatus of this invention was described, this invention is not limited to the said embodiment. The present invention can be carried out in various forms with modifications and improvements that can be made by those skilled in the art without departing from the scope of the mixed liquid separation device of the present invention.

  Below, the Example of the liquid-liquid separator of this invention is described using Table 1 and FIGS. 1-4 with a comparative example.

[Example 1]
The mixed liquid separation device of Example 1 includes a separation container 10 and chips 81 to 85 made of chips stored in internal containers 71 to 75. Below, the structure of the mixed-liquid separator of a present Example is demonstrated using FIG. In addition, FIG. 1 is sectional drawing which shows the outline of the liquid mixture separator of a present Example.

The separation container 10 is a transparent resin-made transparent container having an approximately rectangular parallelepiped (40 cm × 60 cm × 40 cm) and an open top. The separation container 10 is configured such that the inside of a transparent container is partitioned by five partition plates 12, 23, 34, 45, and 56. The respective partition plates are arranged in parallel so as to be equally spaced in the longitudinal direction of the transparent container, and partition spaces 1 to 6 (hereinafter referred to as first partition to sixth partition, respectively). The first to sixth sections are equally divided, and the upper opening area is 400 cm ² (16.7% of the total opening area). A plurality of communication holes having a diameter of 10 mm positioned below the liquid level are formed in the five partition plates (the number is omitted in FIG. 1). Note that the position of the liquid level is determined by the position of the discharge port 9 described later. By this communication hole, the first and second sections adjacent to each other with the partition plate 12 therebetween, the second and third sections adjacent to each other with the partition plate 23 therebetween, and the third and second sections adjacent to each other with the partition plate 34 interposed therebetween. The four sections, the fourth section and the fifth section adjacent to each other with the partition plate 45 therebetween, and the fifth section and the sixth section adjacent to each other with the partition plate 56 therebetween communicate with each other.

  In the sixth section, a discharge port 9 is formed at a position 25 cm from the bottom surface of the separation container 10. Since the liquid in the separation container 10 overflows from the discharge port 9, even if the mixed liquid is continuously supplied, it does not become any more, and the position of the discharge port 9 becomes the position of the liquid level. The effective liquid amount calculated from the position of the discharge port is 60L.

  In this embodiment, the first compartment to the fifth compartment are the separation chamber and the sixth compartment is the recovery chamber. The first section to the fifth section are filled with chips 81 to 85 made of chips generated when an aluminum alloy casting is cut by a machining center. When filling the chips, prepare inner containers 71 to 75 made of a stainless steel wire mesh that is slightly smaller than the internal space of each section and is fine enough that the chips do not fall off, The inside container is inserted into each compartment in a state where chips are accommodated. Therefore, the first to fifth compartments are composed of double containers of the separation container 10 and the inner containers 71 to 75. Under the present circumstances, the porosity of the chip material with which the 1st division-the 5th division were filled is 97% (filling rate 3%). Further, the filling amount of the chips is adjusted so as to be 2 cm higher than the liquid level.

  The mixed liquid separation device of this embodiment is used in machining center processing, and is provided side by side with a tank (tank capacity 600 L) that stores a mixed liquid in which machine oil is mixed in an emulsion-type water-soluble cutting liquid (coolant). The liquid mixture is supplied from the tank to the first compartment using a pump. When the liquid mixture is supplied from the upper opening of the first compartment, the first compartment to the sixth compartment are sequentially filled with the liquid mixture. After the machine oil was separated in the first to fifth compartments, it was confirmed that the liquid received in the sixth compartment overflowed from the outlet 9.

  And the liquid discharged | emitted from the discharge port 9 is utilized again for a machining center process.

[Example 2]
In the sixth section, the mixed liquid separation device is the same as in Example 1 except that the chip material 86 ′ is filled using the inner container 76 so as to be 2 cm lower than the liquid level (see FIG. 2).

[Comparative Example 1]
In the sixth section, the mixed liquid separation device is the same as in Example 1 except that the chip material 86 is filled using the internal container 76 so as to be 2 cm higher than the liquid level (see FIG. 3).

[Comparative Example 2]
The mixed liquid separation device is the same as in Example 1 except that the chip material is not filled (see FIG. 4).

<Evaluation>
Using the above four liquid mixture separators, a test for separating the coolant from the liquid mixture was conducted.

  Prior to the start of the test, the tank of the mixture was cleaned and filled with new coolant. At this point, it was confirmed that no machine oil that floated on the liquid surface (hereinafter referred to as “floating oil”) was found, and that no rotting odor was felt.

  Thereafter, the machining center was operated, and the liquid mixture was supplied from the tank to the first section of the liquid mixture separator at a rate of 5 L / min. Therefore, the average flow rate of the mixed liquid (the value obtained by dividing the supply speed of the mixed liquid by the area of the partition plate) is 0.83 mm / second. Supply of the mixed liquid to the mixed liquid separator was continuously performed regardless of whether the machining center was operated. The test was conducted for 4 weeks, and in the apparatuses of Examples 1 and 2 and Comparative Example 1, the chip material was changed three times each week.

  In addition, when exchanging the chip material, the chip is taken out from each compartment together with the inner container, and after the used chip is discarded, the new chip is accommodated in the inner container. And it completes by returning each inner container to each division again.

  After 4 weeks, a sensory test of the odor intensity of the coolant and a visual observation of the floating oil in the sixth compartment were performed. The results are shown in Table 1 and FIGS. Moreover, about the coolant of 6th division, the commercially available bacteria checker was used and the breeding condition of the anaerobic bacteria was investigated. The results are shown in Table 1.

In the mixed liquid separators of Example 1 and Example 2, although the rot odor was felt, the strength was extremely weak. In our devices Examples 1 and 2, the first compartment to fifth compartment (i.e. separation chamber) floating oil layer O ₁₁ attached to chips in a liquid surface portion ~ O ₁₅ and O ₂₁ ~ O ₂₅ (Fig, Formed by shading). The floating oil layer having a thickness of 6 to 7 cm in the first section is in the order of O ₁₁ → O ₁₂ → O ₁₃ → O ₁₄ → O ₁₅ and O ₂₁ → O ₂₂ → O ₂₃ → O ₂₄ → O ₂₅ . The thickness was reduced, and in the fifth section, an extremely thin floating oil layer was present. Therefore, the mixture ratio of the mixed liquid decreased in the order of L ₁₁ → L ₁₂ → L ₁₃ → L ₁₄ → L ₁₅ and L ₂₁ → L ₂₂ → L ₂₃ → L ₂₄ → L ₂₅ . . And the floating oil was not seen at all in the 6th division where the chip material was filled lower than the liquid level. Therefore, the mixed liquid indicated by L ₁₆ and L ₂₆ contained almost no machine oil, and the liquid discharged from the discharge port 9 was milky white coolant itself.

  In Example 2, since the chip material is also filled in the sixth section, floating oil may be generated more easily than Example 1. However, in the sixth section, the liquid in the liquid surface portion is discharged from the discharge port 9 by overflow, and as a result, it is considered that no floating oil was confirmed.

Further, when L ₁₆ and L ₂₆ were determined by a bacterial checker, the number of viable bacteria was 10 ⁸ / ml, and the number of anaerobic bacteria was small. This is presumably because the coolant and air were in good contact with each other on the liquid surface of the sixth compartment, and the decay was suppressed.

In the mixed liquid separation device of Comparative Example 1, a stronger odor was felt than in Example 1 and Example 2. Moreover, in the apparatus of Comparative Example 1, floating oil layers O _{31 to} O ₃₆ (indicated by hatching in the figure) were formed on the liquid surface portions of the first to sixth sections. Each floating oil layer becomes thinner in the order of O ₃₁ → O ₃₂ → O ₃₃ → O ₃₄ → O ₃₅ → O ₃₆ , but the liquid at the liquid level is discharged from the discharge port 9 by overflow. Even in 6 compartments, the floating oil adhered to the chip material, and a floating oil layer was formed.

Further, if the L ₃₆ of the sixth compartment to determine bacterial checker, but the number of viable cells was 10 ⁸ cells / ml similar to the above embodiments, the anaerobic bacterial count was larger than each embodiment.

In the mixed liquid separator of Comparative Example 2, a strong odor was felt. In the apparatus of Comparative Example 2, floating oil layers O _{41 to} O ₄₆ (indicated by hatching in the figure) were formed on the liquid surface portions of the first section to the sixth section. Each floating oil layer had the same thickness, and the opening of the separation container 10 was completely covered with the floating oil. Therefore, it can be expected that the machine oil is mainly discharged from the discharge port 9.

Further, when the L _{46 in} the sixth compartment was determined by a bacterial checker, the number of viable bacteria was 10 ⁸ cells / ml as in Examples 1 and 2 and Comparative Example 1, but the number of anaerobic bacteria was very large. .

  That is, the mixed liquid separation device of this example was able to efficiently separate the coolant from the mixed liquid composed of the coolant and the machine oil, and was able to suppress the decay of the coolant.

It is sectional drawing which shows typically the outline of the liquid mixture separation apparatus of Example 1, and the formation state of floating oil. It is sectional drawing which shows typically the outline of the liquid mixture separation apparatus of Example 2, and the formation state of floating oil. It is sectional drawing which shows typically the outline of the liquid mixture separation apparatus of the comparative example 1, and the formation state of floating oil. It is sectional drawing which shows typically the outline of the liquid mixture separation apparatus of the comparative example 2, and the formation state of floating oil.

Explanation of symbols

10: Separation container 1: First compartment (separation chamber in the embodiment)
2: Second compartment (separation chamber in the embodiment)
3: Third section (separation chamber in the embodiment)
4: Fourth section (separation chamber in the embodiment)
5: Fifth section (separation chamber in the embodiment)
6: Sixth section (in the example, the collection room)
9: Discharge ports 12, 23, 34, 45, 56: Partition plates 71, 72, 73, 74, 75, 76: Internal containers 81, 82, 83, 84, 85, 86, 86 ′: Chip material (flow velocity Slow material)
L ₀₀ : Liquid mixture O ₀₀ : Machine oil

Claims (7)

A separation chamber that is supplied with a mixture of two or more liquids having different specific gravity and separates a specific liquid from the mixture by a difference in specific gravity, and communicates with the separation chamber at a position below the liquid level of the mixture. A collection chamber having a discharge means for discharging the specific liquid received from the separation chamber, and a separation container,
A flow rate slowing material that slows the speed at which the liquid mixture is filled in the separation container and moves in the separation container;
The slow flow rate material is a chip material made of chips produced by cutting, and is filled so as to be exposed from the liquid level in the separation chamber, and is lower than the liquid level in the recovery chamber. A mixed liquid separation device which is filled or not filled .   The mixed liquid separation device according to claim 1, wherein the mixed liquid includes a water-soluble cutting liquid and a lubricating oil having a specific gravity smaller than that of the cutting liquid, and the specific liquid is the cutting liquid. The mixed liquid separation device according to claim 1 or 2, wherein the chips are filled in the separation container in a state of being accommodated in an internal container having a plurality of through holes through which the mixed liquid passes. The liquid mixture separator according to any one of claims 1 to 3, wherein the discharge means is a discharge port that is formed in the recovery chamber and discharges the liquid in the liquid surface portion. The separation chamber includes a plurality of partition spaces in which the internal space of the separation container is partitioned in a direction intersecting the liquid surface by a partition plate having a communication hole in which two adjacent ones communicate with each other at a position below the liquid surface. The liquid mixture separator according to any one of claims 1 to 4, which has one or more of the following. The liquid mixture separation device according to any one of claims 1 to 5 , wherein an area of the liquid surface formed in the recovery chamber is 10 to 70% of a total area of the liquid surface formed in the separation container. The mixed liquid separator according to any one of claims 1 to 6 , wherein the flow rate slowing material has a porosity of 96 to 99%.

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