KR20000062448A - Purifying system - Google Patents

Abstract

The purifying system according to the present invention includes a second purifying apparatus which is disposed downstream of the first purifying apparatus and repurifies the working liquid purified by the first purifying apparatus, wherein the second purifying apparatus includes the working liquid storage oil. A tank, a filtration filter partitioning the middle of the working liquid storage tank up and down, and a work provided through the filtration filter at approximately the center of the working liquid storage tank and supplied from the first purifying apparatus. A working liquid introduction pipe for diffusing and draining the liquid from the lower end side of the working liquid storage tank, a bank formed at a lower end of the working liquid storage tank, and a lower end formed along the inner circumference of the bank and having a lower end lower than the lower end of the bank; An emulsion separating wall and a collecting groove formed on the outer surface of the weir.

Description

Purification System {PURIFYING SYSTEM}

The present invention relates to a purification system for removing water impurities mixed in the liquid from a working liquid used in a production process.

Conventionally, as a working liquid used in a production process, the cleaning liquid used for a washing operation, the grinding liquid (coolant: coolant) used for a grinding operation, etc. are mentioned. Generally, various impurities are mixed in these working liquids, so it is necessary to purify them once when reused.

Various techniques are already known as a means of purifying these working liquids. For example, Japanese Patent Application Laid-Open No. 58-174211 discloses a magnet drum that adsorbs impurities such as cutting powder made mainly of magnetic material, and removes impurities adsorbed on the magnet drum by scrapers to remove and remove precipitated particles. A technique for removing impurities of a nonmagnetic material with a scraper chain is disclosed.

In Japanese Patent Laid-Open No. 59-39309, an ultrasonic diaphragm is disposed on the side wall of the tank, and the ultrasonic components oscillated from the ultrasonic vibrating plate are applied to each other to cause the oil component mixed in the working liquid to vibrate and to coagulate with each other. A technique is disclosed in which the suspended impurities are suspended at the same time and the suspended impurities are removed by a skimmer.

Further, Japanese Patent Laid-Open No. 4-129643 has a plurality of grooves formed in a spiral or concentric shape on the surface of the rotating plate, and the lower part of the rotating plate is immersed perpendicularly to the working liquid contained in the tank, and slowly rotated to form the working liquid. A technique is disclosed in which an impurity, which is mainly contained in an oil component floating on a liquid surface, is attached to a surface of the rotating plate to be separated from a working liquid, and then an impurity attached to the surface of the rotating plate is removed by a scraper and accumulated in a purification unit. have.

In addition, Japanese Patent Application Laid-Open No. 3-294142 discloses a technique in which a filter having a filter cloth is installed on the body of a rotating drum, the cutting oil is passed through the filter cloth, introduced into the rotating drum, and then pumped from a conduit to a recovery tank. Is disclosed.

However, although some conventional techniques or combinations of these prior arts can achieve some purification effect, the fine impurities mixed in the working solution cannot be removed.

For this reason, in the working liquid purified by the conventional purification system employing each of the above purification methods, the quality of the working liquid is deteriorated due to corrosion of fine residues, and there is a limit in prolonging the replacement cycle. Is higher.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to provide a purification system which can greatly improve the purification of the working liquid, and can repeatedly use the working liquid in the long term at all times, and at the same time, lower operating costs, waste liquid treatment costs, and the like. The purpose.

1 is a top view schematically showing a purification system according to the present invention.

2 is a cross-sectional view taken along line II of FIG. 1.

3 is a cross-sectional view taken along the line II-II of FIG.

4 is a sectional view of principal parts of the scraper conveyor;

5 is a front view showing the main portion of the scraper;

6 is a cross-sectional view taken along the line IV-IV of FIG. 5.

Fig. 7 is a top view showing a floating inhaler;

8 is a cross-sectional view taken along the line V-V in FIG. 7.

9 is a cross-sectional view taken along the line III-III of FIG. 1.

In order to achieve the above object, the first purification system according to the present invention is a purification system for purifying a working liquid used in a manufacturing process, the first purifying apparatus being disposed in a working liquid circulation path to remove impurities mixed in the working liquid; A second purifying device disposed downstream of said first purifying device and repurifying the working liquid purified by said first purifying device, said second purifying device comprising a working liquid storage tank and said working liquid storage tank A filtration filter partitioning the middle of the upper and lower sides and a working liquid supplied through the filtration filter at approximately the center of the working liquid storage tank and being supplied from the first purifying device from the lower end side of the working liquid storage tank. A working liquid introduction pipe, a weir formed at a lower end of the working liquid storage tank, and a lower end formed along an inner circumference of the weir and lower than a lower end of the weir. It includes a collection groove formed in the fluid separation wall and the outer surface of the dam.

The second purification system according to the present invention is a discharge valve capable of discharging impurities deposited on the lower end of the working liquid storage tank on the premise of the first purification system, the bottom of which is inclined downward toward the center. It is characterized in that installed in the center.

The third purifying system according to the present invention is provided with a centrifuge disposed between the first purifying device and the second purifying device, based on the first or second purifying system, and the centrifugal separator is supplied from the first purifying device. It is possible to purify the working liquid, characterized in that it is separated by centrifugation and supplying the working liquid containing impurities to the second purifying apparatus.

The fourth purification system according to the present invention is characterized in that the centrifuge adjusts the flow rate of the working liquid supplied from the first purification device to the second purification device on the premise of the first purification system.

The fifth purification system according to the present invention is based on the first purification system, and the first purification device is disposed in the first tank chamber and the first tank chamber to deposit precipitated impurities and floating impurities to the outside of the first tank chamber. And a scraper conveyor for discharging.

A sixth purification system according to the present invention is based on the fifth purification system, wherein the scraper conveyor includes a conveyor body and a plurality of scrapers displaceably attached to the conveyor body.

The seventh purification system according to the present invention is based on the fifth purification system, and the first purification device includes a second tank chamber formed at a position adjacent to a downstream side of the first tank chamber, and disposed in the second tank chamber. And suction means for sucking the floating impurities and returning them to the first tank chamber.

The eighth purification system according to the present invention is based on the seventh purification system, and the second tank chamber includes heating means for heating the working liquid.

The ninth purification system according to the present invention is based on the seventh purification system, and the second tank chamber is

Circulating means for circulating the working liquid in the second tank chamber, and a corner plate for forming a curved portion at the corner of the second tank chamber.

The tenth purifying system according to the present invention is based on the seventh purifying system, and the second tank chamber is characterized in that it comprises a recess formed at the center of the bottom portion and a discharge valve disposed at the lower end of the recess.

An eleventh purification system according to another aspect of the present invention is a purification system for purifying a working liquid used in a manufacturing process, the first purifying apparatus being disposed in a working liquid circulation path to remove impurities mixed in the working liquid, A second purifying apparatus disposed on a downstream side of the first purifying apparatus and repurifying the working liquid purified by the first purifying apparatus, wherein the first purifying apparatus comprises a first tank chamber and a downstream side of the first tank chamber; A second tank chamber formed at a position adjacent to and communicating with the first tank chamber, a scraper conveyor disposed in the first tank chamber to discharge precipitated impurities and suspended impurities out of the first tank chamber, and a second tank chamber And suction means for sucking suspended impurities and returning them to the first tank chamber.

A twelfth purification system according to the present invention is based on an eleventh purification system. The scraper conveyor includes a conveyor body and a plurality of scrapers displaceably attached to the conveyor body.

The thirteenth purification system according to the present invention is based on the eleventh purification system, and the second tank chamber includes heating means for heating the working liquid.

The fourteenth purification system according to the present invention is based on the eleventh purification system, wherein the second tank chamber includes circulation means for circulating a working liquid in the second tank chamber, and a curved portion at a corner of the second tank chamber. It includes a corner plate.

The fifteenth purification system according to the present invention is based on the eleventh purification system, and the second tank chamber includes a recess formed at an approximately center portion of the bottom to deposit impurities, and a discharge valve disposed at a lower end of the recess. do.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 9 show a working liquid (cleaning liquid) purification system according to an embodiment of the present invention, which is a compound wrapping device for finishing the tooth surface of a hypoid gear set. It is intended for lapping by a compound lapping machine, and then purifying the working liquid (ie, cleaning liquid) used in the washing machine for the cleaning process.

As shown in Fig. 1, the purifying system includes a first purifying apparatus 1 for first purifying a working liquid used in a scrubber (not shown), and a downstream purifying apparatus of the first purifying apparatus 1 It is arranged so as to be connectable with 1), and is provided with the 2nd purification apparatus 2 which performs secondary purification with respect to a working liquid. In addition, reference numeral 3 denotes a cleaning tank for storing the working liquid purified in the present purification system.

The said 1st purification apparatus 1 is equipped with the 1st working liquid storage tank 5 which oils a working liquid.

The first working liquid storage tank 5 is formed in a substantially box shape, and the inside thereof is partitioned into a first tank chamber 7 and a second tank chamber 8 by a partition plate 6.

In the longitudinal direction of the partition plate 6, the first tank chamber 7 and the second tank chamber 8 are positioned near the liquid level of the working liquid stored in the first working liquid storage tank 5. The communication port 6a which communicates is formed (refer FIG. 2 and FIG. 3).

In addition, a working fluid supply groove 9 is provided above the first working fluid storage tank 5. The downstream end of the work liquid supply groove 9 reaches the first tank chamber 7, through which the work liquid after being used in the scrubber is supplied to the first tank chamber 7. do.

Here, the leg part 5a is provided in the element of the bottom part of the said 1st working liquid storage tank 5, and this leg part 5a makes the 1st working liquid storage tank 5 a predetermined height from the installation surface. Supported from above (see FIGS. 2 and 3).

As shown in Fig. 3, the first tank chamber 7 is provided with a scraper conveyor 11 for removing the sludge deposited on the bottom surface 10 or the oils and fats suspended in the working liquid.

Since the scraper conveyor 11 is slidably installed along the bottom surface 10 of the first tank chamber 7, one end of the scraper conveyor 11 is in contact with the side wall of one side of the first tank chamber 7 and the other end thereof is the first tank. It protrudes from the other side of the yarn 7.

That is, the bottom surface 10 of the first tank chamber 7 is formed with an inclined surface 10a inclined upward in the longitudinal direction from the middle to the other end side thereof, and the other end side of the scraper conveyor 11 is the inclined surface ( It inclines along 10a) and protrudes from the other end side of the 1st tank chamber 7. As shown in FIG. Moreover, the curved surface 10b is formed in the one end side of the bottom surface 10 of the said 1st tank chamber 7, and the one end side of the scraper conveyor 11 slides along this curved surface 10b. .

Here, the scraper conveyor 11 is formed of a conveyor main body 12 and a plate-shaped member of a rectangular shape having a length approximately equal to the width of the first tank chamber 7 (see Fig. 2) on the conveyor main body 12 It is equipped with the some scraper 13 installed in the.

Specifically, as shown in Fig. 4, the conveyor main body 12 is provided with an attachment plate 12a for attaching the scraper 13 at predetermined intervals. Moreover, the said scraper 13 is provided with the long hole 13a, The bolt 15 is inserted into this long hole 13a through the spacer 14, and the scraper 13 is made by this bolt 15. ) Is attached to the attachment plate 12a so as to be displaceable (see FIG. 6).

The scraper 13 is displaceably attached to the conveyor body 12 so that the bottom surface 10 of the first tank chamber 7 when the conveyor body 12 is driven in the direction of arrow A (see FIG. 3). It is reliably slid and discharges sludge, oil or the like to the outside of the other end side of the first tank chamber 7 along the inclined surface 10a. Further, a recovery box 16 for recovering discharge sludge, oil or the like is provided at a position where the other end of the scraper conveyor 11 leads to the outside of the other end side of the first tank chamber 7.

In addition, the first tank chamber (7) is provided with an emulsion plate (17), the emulsion plate (17) is in the working fluid flowing out to the second tank chamber (8) through the communication port (6a) It acts to separate the fats and oils floating on the liquid surface.

The latex separating plate 17 is formed in a box shape with one side and a lower surface open, and the lower end portion is attached to the partition plate 6 at a position surrounding the communication port 6a by being immersed below the liquid level.

The heating plate 20 for heating the working liquid introduced from the first tank chamber 7 is installed at the position opposite to the communication port 6a in the second tank chamber 8.

Here, the heating plate 20 is disposed so that the lower end is spaced apart upward by about 10 cm from the bottom surface of the second tank chamber (8). Moreover, this arrangement becomes a structure which makes it easy to generate | occur | produce a convection to the inflow | flow_flowing working liquid.

In addition, four corners of the second tank chamber 8 are provided with corner plates 21, and the corner plates 21 form curved portions with respect to the four corners in the second tank chamber 8. It improves the flow of the working liquid and at the same time serves to prevent sludge and the like deposited at four corners.

In addition, a recess 22a for collecting and depositing sludge, etc., collected in one place is provided at a substantially central portion of the bottom surface 22 of the second tank chamber 8, and a discharge valve is provided at the lower end of the recess 22a. 22b is provided.

In addition, in the substantially center portion of the second tank chamber 8, a floating suction unit 23 for absorbing oil and the like floating on the liquid surface of the working liquid upward and returning it to the first tank chamber 7 is provided.

The floating suction device 23 is provided with a holding suction part 24 which floats in the vicinity of the liquid level of the working liquid and sucks floating oil and the like near the liquid level.

As shown in Figs. 7 and 8, the holding suction portion 24 is formed of a plate body 24a made of, for example, a triangular stainless steel, and a floater 24b provided at three corners of the plate body 24a. And a holding inlet 24c provided in the center of the plate body 24a.

The holding suction portion 24 is provided so that the upper end of the holding suction opening 24c floats slightly below the liquid level of the working liquid, whereby the floating suction of the liquid level can be sucked mainly from the holding suction opening 24c.

In addition, an oil pipe 26 is connected to the lower end of the holding suction opening 24c. The other end of the oil pipe 26 reaches the first tank chamber 7, and the oil sucked from the oil suction suction port 24c by the pump 25 provided in the middle of the oil pipe 26 is the first tank chamber 7. Return to).

Here, the plate body 24 is provided with a plurality of through holes 24d for preventing sludge or the like from being deposited on the plate body 24a, whereby the buoyancy of the holding suction portion 24 is kept constant, thus floating position. Is kept constant.

The second purifying device 2 is installed to be movable in the vicinity of the first purifying device 1.

The second purifying device 2 is connected to the second tank chamber 8 through the liquid pipe 29, the first centrifuge 30, and the second centrifuge 31.

In detail, the pump 32 is provided in the middle of the said liquid pipe 29, and this pump 32 sucks and raises the primary-purified work liquid in the 2nd tank chamber 8.

In addition, since the first and second centrifugal separators 30 and 31 are well-known ones having a separation pipe (not shown), the working fluid into which the inlets 30a and 31a flow into the separation pipe is vortexed. The sludge contained in the working liquid is to be separated. Then, the working liquid purified by the separator is discharged from the outlets 30b and 31b, and the working liquid containing one sludge or the like is discharged from the outlets 30c and 31c. In the present embodiment, for example, Laval Separator (trade name: Nihon Laval Co., Ltd.) is employed as the first and second centrifuges 30 and 31.

The downstream end of the liquid pipe 29 is connected to the inlet port 30a of the first centrifugal separator 30.

In addition, the outlet 30b of the first centrifuge 30 is connected to the inlet 31a of the second centrifuge 31 via the liquid conduit 35.

On the other hand, the outlet 31c of the first centrifugal separator 30 is connected to the second purifying device 2 via the liquid pipe 38.

The outlet 31b of the second centrifugal separator 31 is connected to the cleaning tank 3 through the liquid pipe 37.

The outlet 31c of the second centrifuge 31 is connected to the second purifying device 2 via the liquid duct 38.

That is, the first and second centrifuges 30 and 31 are connected in series, and the clean working liquid purified by the first and second centrifuges 30 and 31 is directly cleaned by the cleaning tank 3. On the other hand, only the working liquid including sludge or the like is supplied to the second purifying device 2.

A branch pipe 29a is provided in the middle of the lower portion of the liquid pipe 29 than the pump 32 so as to enable branching of the working liquid flowing through the liquid pipe 29. The upstream side of this branch pipe 29a reaches the vicinity of the heating plate 20 in the second tank chamber 8. That is, a part of the working liquid sucked and raised by the pump 32 is returned to the tank chamber 8 by the branch pipe 29a, and is discharged near the heating plate 20. And the working liquid in the 2nd tank chamber 8 is circulated centering on the recessed part 22a by the working liquid discharged | emitted from this branch pipe 29a.

The second purifying apparatus includes a second working liquid storage tank 40 for storing working liquid.

The second working liquid storage tank 40 includes a cylindrical tank body 40a, and a lower end of the tank body 40a is integrally formed to be a tapered bottom surface 40b for depositing sludge or the like. A mat hole 40c is formed below the bottom surface 40b.

In this case, since the second working liquid storage tank 40 is disposed on the carrier car 41, the second working liquid storage tank 40 is installed to be movable near the first purifying device 1.

At a substantially central position of the second working liquid oil storage tank 40, a working liquid introducing pipe 42 having a rectangular cross section is installed.

The outlet port 30c, 31c of the 1st, 2nd centrifuge 30, 31 is connected to the upper part of this work liquid introduction pipe 42 through the said liquid pipes 36 and 38, and the work liquid is It is configured to be supplied.

In addition, a plurality of diffusion holes 42a are provided in the lower portion of the working liquid introduction pipe 42, and the working liquid supplied to the working liquid introduction pipe 42 is supplied from the diffusion hole 42a to the second working liquid storage oil tank. 40 is to be uniformly diffused.

In addition, the filtration filter holding portion 43 is provided at a position slightly biased upward from the center of the tank body (40a).

The filtration filter 44 is detachably held by this filtration filter holding part 43, and the inside of the tank main body 40a is partitioned by this filtration filter 44. As shown in FIG.

In addition, for example, the filtration filter 44 has a diameter of about 5 μm. Insulation soundproof material for building materials laminated glass wool of about 5cm thickness is adopted.

In addition, a stepped portion is formed in a semicircular arc portion on one side of the upper end of the tank body 40a, and the stepped portion functions as a weir 45 for flowing the purified working liquid.

In the inner circumference of the bank 45, an emulsion separator 46 is provided. The emulsion separating plate 46 is installed at predetermined intervals along the inner circumference of the weir 45. The upper end of the latex separating plate 46 is located above a predetermined height above the weir 45, and the lower end of the latex separating plate 46 is immersed in the working liquid below the weir 45.

In addition, the outer periphery of the weir 45 is provided with a collecting groove 47 for collecting the work liquid overflowed from the weir 45, the collection groove 47 is a cleaning tank (3) through the liquid pipe 48 ) Is connected.

In the second working liquid storage tank 40, a discharge valve 49 is installed at a position lower than the filtration filter 44 of the tank body 40a, and another discharge valve 50 is disposed at the lower end of the mat hole 40c. Is installed.

Next, the operation of the purification system by the above configuration will be described.

The working liquid introduced into the first tank chamber 7 from the washing machine (not shown) through the working liquid supply groove 9 is gently flowed and diffused into the first tank chamber 7.

At the time of diffusion, sludge and the like having a relatively large particle diameter among the impurities contained in the working liquid are precipitated on the bottom surface 10 of the first tank chamber 7 while oils and the like are suspended in the liquid surface of the working liquid.

At this time, the scraper conveyor 11 is operated in the direction of arrow A of FIG. 3, and the precipitated sludge or the floating fat or the like is pushed upward along the inclined surface 10a of the bottom surface 10 by the scraper 13. It is recovered to the recovery box 16.

Here, the curved surface 10b is formed at one end of the bottom surface 10, and the scraper 13 is slid from the curved surface 10b to prevent the precipitated sludge and the like from remaining and decaying on the bottom surface 10. Can be.

Next, the working liquid diffused into the first tank chamber 7 flows into the tank chamber 8 of the second tank through the communication port 6a. At this time, since the working liquid passes through the lower part of the fluid separation plate 17 and reaches the communication port 6a, the oil and the like floating on the liquid surface is stopped by the fluid separation plate 17.

The working liquid introduced into the second tank chamber 8 first collides with the heating plate 20 to generate convection and is heated at the same time. As a result, in the first tank chamber 7, fine sludge having a thickness of 10 µm or less removed is floated to the liquid surface, and the oil and fat remaining in the working liquid is decomposed and floated to the liquid surface.

Next, the working liquid flows through the inside of the second tank chamber 8 at a gentle flow rate around the recessed portion 22a by the working liquid discharged from the branch pipe 29a. The sludge and the like thus precipitated are concentrated on the recessed portion 22a serving as the center of the flow, and at the same time, fine sludge and oils and fats suspended on the liquid level also concentrate upwards of the recessed portion 22a.

Sludge and the like deposited on the recess 22a are removed by appropriately opening the discharge valve 22b, while floating fine sludge, oil or the like is transferred to the first tank chamber 7 by the floating suction unit 23. To return.

Here, the corner plates 21 are provided at four corners of the second tank chamber 8 to improve the flow of the working liquid in the first tank chamber 8, and sludge or the like at the four corners. It is possible to prevent deposition and corruption.

The working liquid thus purified is absorbed upward from the liquid pipe 29 and flows into the first centrifuge 30. Here, the self-employed liquid absorbed upward from the liquid pipe 29 is a relatively clean working liquid such that only a small amount of sludge, oil or the like remains since the first purification is performed in the first purifying device 1.

The first centrifuge 30 purifies the working liquid again, supplies the purified working liquid to the second centrifuge 31 through the liquid pipe 36, and simultaneously supplies the working liquid including sludge and the like to the liquid pipe ( It is supplied to the 2nd purification apparatus 2 through 36).

The second centrifuge 31 purifies the working liquid again, and introduces the purified working liquid into the cleaning tank 3 through the liquid conduit 37 while simultaneously conveying the working liquid including sludge and the like into the liquid conduit 38. Supply to the second purifier (2) through.

Discharge valves (not shown) are provided in the discharge ports 30c and 31c, and the inflow amount of the working liquid into the second purifying device 2 can be adjusted by adjusting these opening and closing degrees.

As described above, by purifying the working liquid by the first and second centrifugal separators 30 and 31, the burden of the working liquid purification by the second purifying device 2 described below can be reduced. In the case where the amount of the working liquid to be purified is small, for example, the first and second centrifuges 30 and 31 may be omitted, and the liquid pipe 29 may be directly connected to the second purifying apparatus 2. have.

When the working liquid is supplied to the working liquid introducing pipe 42 through the liquid pipes 36 and 38, these working liquids are gradually moved downwardly toward the bottom of the second working liquid oil storage tank 40 through the diffusion hole 42a. It flows into and diffuses uniformly in substantially the whole direction.

The diffused working liquid flows upward of the tank body 40a at a gentle flow rate. At this time, impurities such as sludge remaining in a small amount in the working liquid are precipitated and deposited on the tapered bottom surface 40b, and then tapered again. The surface is settled and integrated into the mat hole 40c.

The working liquid again flows upward over the tank body 40a, and when passed through the filtration filter 44, sludge and the like remaining in the working liquid without being precipitated are filtered out.

Here, since the impurities trapped in the filtration filter 44 are small, and the filtration of the working liquid is filtered from the lower side to the upper side, the impurities trapped in the filtration filter 44 are tapered in a certain amount. Precipitates on the tank bottom surface 40b. For this reason, the exchange life of the filtration filter 44 can be kept long.

The working liquid filtered by the filtration filter 44 flows upward again, overflows by the weir 45 and flows into the collecting groove 47. At this time, the floating oil and the like existing in a small amount on the liquid level of the working liquid is stopped by the fluid separation plate 46, and only the clean working liquid flows into the collection groove 47. The clean working liquid introduced into the collection groove 47 flows into the cleaning tank 3 through the liquid pipe 48.

Here, sludge and the like deposited in the mat hole 40c are removed by appropriately opening the discharge valve 50. In addition, oils and fats floating on the liquid level of the working liquid are appropriately removed by vacuum air or the like. Moreover, the discharge valve which removes a hold etc. to the upper side of the 2nd working liquid storage tank 40 can also be provided.

In this way, the second working liquid oil storage tank 40 may act as a sedimentation tank, a filtration tank, and an oil separation tank in a lower order to purify the working liquid.

The working liquid stored in the cleaning tank 3 is again supplied to the scrubber.

In order to clean the second purifying device, first, the discharge valve 49 is opened to remove the floating portion of the working liquid, and then the discharge valve 50 is opened, and the sludge deposited in the mat hole 40c. The work liquid containing a lot of the back is removed, and then the mat hole 40c is opened to perform cleaning. The floating part of the working liquid can be reused.

According to such a purification system, it is possible to purify at a high level, so that the replacement cycle of the working liquid can be extended to about 60 weeks.

Therefore, it is possible to reduce the waste liquid treatment frequency of the working liquid, and the usage amount of the working liquid can be reduced.

In addition, since it is possible to reduce the amount of waste liquid discharged, the waste liquid treatment cost can be reduced, and the environment is also good.

In addition, the number of maintenance steps required for exchanging the working liquid can be greatly reduced.

In addition, a recess 22a for depositing sludge or the like is provided on the bottom surface 22 of the first tank chamber 5, and a discharge valve is provided at the lower end of the recess 22a to easily remove the sludge. can do.

Further, a sludge or the like is deposited on the lower side of the second working liquid storage tank 40, and a tapered bottom surface 40b capable of sedimentation accumulation is provided, and a discharge valve ( 50) can be easily removed because the sludge is deposited.

In addition, in the form of this embodiment, although the cleaning liquid used as a washing | cleaning machine was mentioned and demonstrated as the working liquid, the working liquid purified by this purification system is not limited to the washing | cleaning liquid, For example, grinding liquid used as a grinding machine (coolant: coolant) It can also purify.

As described above, according to the present invention, the purification of the working liquid can be greatly improved, the working liquid can be repeatedly used for a long time, and the operating cost, waste liquid treatment cost, and the like can be reduced.

Claims (15)

As a purification system to purify the working liquid used in the manufacturing process, A first purifying apparatus disposed in the working liquid circulation path to remove impurities mixed in the working liquid; A second purifying device disposed downstream of the first purifying device for repurifying the working liquid purified by the first purifying device; Equipped, The second purifying device Working fluid oil tank, A filtration filter for partitioning the middle of the working liquid storage tank up and down; A work liquid introduction pipe installed to penetrate the filtration filter at approximately the center of the work liquid storage tank to diffuse and drain the work liquid supplied from the first purifying device from the lower end side of the work liquid storage tank; A weir formed in the lower end of the working liquid storage tank, An oil separation wall formed along an inner circumference of the bank and at a lower end thereof lower than a bottom of the bank; Collecting grooves formed on the outer surface of the bank; Purifying system characterized in that it comprises. The method of claim 1, And a discharge valve capable of discharging impurities deposited at the lower end of the inclined surface and having a bottom portion of the working liquid storage tank formed at an inclined surface inclined downward toward the center portion. The method according to claim 1 or 2, A centrifuge is disposed between the first purifying device and the second purifying device, and the centrifugal separator is purifiable with the working liquid supplied from the first purifying device, and is separated by centrifugation and at the same time contains a working liquid containing impurities. Purifying system, characterized in that for supplying to the second purifier. The method of claim 3, The centrifuge regulates the flow rate of the working liquid supplied from the first purifying device to the second purifying device. The method of claim 1, The first purifying device The first tank compartment, A scraper conveyor disposed in the first tank chamber for discharging sediment impurities and suspended impurities to the outside of the first tank chamber. Purifying system comprising a. The method of claim 5, The scraper conveyor is Conveyor body, A plurality of scrapers displaceably attached to the conveyor body Purifying system comprising a. The method of claim 5, The first purifying device A second tank chamber formed at a position adjacent to a downstream side of the first tank chamber; A suction means which is disposed in the second tank chamber and sucks suspended impurities and returns to the first tank chamber. Purifying system comprising a. The method of claim 7, wherein And the second tank chamber includes heating means for heating the working liquid. The method of claim 7, wherein The second tank chamber Circulation means for circulating the working liquid in the second tank chamber; Corner plate forming a curved portion in the corner of the second tank chamber Purifying system comprising a. The method of claim 7, wherein The second tank chamber A recess formed in the center of the bottom part, The discharge valve located at the bottom of the recess Purifying system comprising a. As a purification system for purifying the working liquid used in the manufacturing process, A first purifying apparatus disposed in the working liquid circulation path to remove impurities mixed in the working liquid; A second purifying device disposed downstream of the first purifying device for repurifying the working liquid purified by the first purifying device; Including, The first purifying device The first tank compartment, A second tank chamber formed at a position adjacent to the downstream side of the first tank chamber to communicate with the first tank chamber; A scraper conveyor disposed in the first tank chamber for discharging precipitated impurities and suspended impurities to the outside of the first tank chamber; A suction means disposed in the second tank chamber while sucking floating impurities to return to the first tank chamber; Purifying system comprising a. The method of claim 11, The scraper conveyor is Conveyor body, A plurality of scrapers displaceably attached to the conveyor body Purifying system comprising a. The method of claim 11, And the second tank chamber includes heating means for heating the working liquid. The method of claim 11, The second tank chamber Circulation means for circulating the working liquid in the second tank chamber; Corner plate forming a curved portion in the corner of the second tank chamber Purifying system comprising a. The method of claim 11, The second tank chamber A recess formed at the center of the bottom so that impurities are deposited; The discharge valve located at the bottom of the recess Purifying system comprising a.