JP4236072B2 - Oil-liquid separator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil-liquid separator for removing oil from a liquid containing oil.
[0002]
[Prior art]
For example, the washed-out oil is mixed in the cleaning liquid that removes the oil attached to the surface of the article to be processed such as a steel part by the quenching process. For this reason, when reusing the cleaning liquid, it is necessary to remove the mixed oil.
[0003]
[Problems to be solved by the invention]
However, oil removal generally uses a method in which cleaning liquid containing oil is stored in an oil-liquid separation tank, and oil that has floated on the liquid surface due to the difference in specific gravity is recovered by an oil recovery device such as an oil skimmer. When the cleaning liquid is purified while circulating the cleaning liquid with the cleaning tank for cleaning the product, the treatment liquid is transferred from the oil-liquid separation tank to the cleaning tank without sufficiently removing oil. There is a problem such as being sent.
[0004]
The present invention has been made in view of such circumstances, and even when the oil contained in the processing liquid is removed while passing through the oil-liquid separation tank, the oil can be reliably removed from the processing liquid. An oil-liquid separator is intended to be provided.
[0005]
[Means for Solving the Problems]
  In order to solve the above-mentioned problem, an oil-liquid separation device according to the present invention includes an oil-liquid separation tank having a liquid inlet and a liquid outlet.Is divided into a primary oil-liquid separation region on the upstream side and a secondary oil-liquid separation region on the bent channel side, and the treated water overflows and moves from the primary oil-liquid separation region to the secondary oil-liquid separation region. A first partition wall having an overflow edge having an inclined surface extending downward toward the upstream end of the bent flow path, and a second partition wall partitioning the primary oil-liquid separation region at a lower portion thereof. Prepared,The liquid outlet is formed at the downstream end of the bent flow path and at the lower part of the oil-liquid separation tank.The oil component is recovered by the oil / liquid recovery device from the upstream surface of the second partition wall in the primary oil / liquid separation region and the liquid surface of the secondary oil / liquid separation region.(Claim 1).
[0006]
  According to the present invention, the oil-liquid separation tank is entered from the liquid inlet, and theFrom the upstream primary oil-liquid separation areaIt moves along the bent flow path and exits from the liquid outlet. During this time, the oil that has floated to the surface of the treated water is recovered by the oil recovery device. Here, since the bent flow path is bent, the flow path of the processing liquid in the oil-liquid separation tank becomes longer, and the oil mixed in the processing liquid is surely kept on the liquid surface by that amount. Will surface. Therefore, the treated water can be reliably purified.
[0007]
Of course, the oil-liquid separator is used in a state where the inflow of the processing liquid from the liquid inlet and the outflow of the processing liquid from the liquid outlet are both stopped and the processing liquid is stored therein. You can also.
[0008]
The bent flow path can be formed in a meandering shape using a partition plate, for example.
[0010]
  In the above configuration,The treatment liquid flows from the liquid inlet into the primary oil-liquid separation region, and passes from the primary oil-liquid separation region to the secondary oil-liquid separation region beyond the overflow edge of the first partition wall. Inflow. And the process liquid which flowed into the said primary oil-liquid separation area | region from the said liquid inlet moves to the downstream of the said 2nd partition through the lower part from the upstream of the said 2nd partition. On the upstream side of the second partition wall, the oil component floating on the liquid surface is,oilIt is collected by the fraction collection device. Therefore, there are no large oil droplets in the processing liquid that moves from the upstream side of the second partition wall to the downstream side of the second partition wall. In the secondary oil / liquid separation region, while the treatment liquid flows through the bent channel,,oilThe oil that has floated to the liquid surface is recovered by the fraction recovery device. The bent channel isAs mentioned above,Since it is bent, the flow path of the treatment liquid in the oil-liquid separation tank becomes longer, and the fine oil droplets mixed in the treatment liquid are surely floated on the liquid surface. . Therefore, the treatment liquid can be reliably purified.
[0011]
  Further, in the oil-liquid separator, there is an inclined surface extending downward from the overflow edge to the upstream end of the bent flow path.Is provided. Therefore,Since the treatment liquid gently flows into the secondary oil-liquid separation region beyond the overflow edge, the treatment liquid in the secondary oil-liquid separation region is not stirred and floats with great effort. The fine oil droplets are prevented from sinking again in the processing liquid.The
[0012]
  Furthermore, if a bubble generating means for generating bubbles from the bottom of the oil-liquid separation tank along the bent flow path is provided (Claim 2), The fine bubbles contained in the treatment liquid flowing through the bent flow path are adsorbed by the bubbles and float to the liquid surface, so that the oil can be recovered more reliably.
[0013]
  Furthermore, the partition plate that forms the bent flow path is submerged in the treatment liquid when the treatment liquid in the oil-liquid separation tank reaches a predetermined full amount, and the treatment liquid is discharged from the liquid outlet. The height of the top edge is exposed when the liquid level is lowered.Claim 3). In this way, when the processing liquid in the oil-liquid separation tank is at a predetermined full amount, that is, when the inflow and outflow of the processing liquid to the oil-liquid separation tank are stopped, Since there is no partition at the liquid level in the secondary oil / liquid separation region, it becomes easier to recover the oil from the liquid level in the secondary oil / liquid separation region.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of the invention will be described with reference to the accompanying drawings.
[0015]
FIG. 1 is a circuit diagram of a cleaning apparatus including an oil-liquid separator according to an embodiment of the present invention. The cleaning device 1 according to the present embodiment is, for example, a device for cleaning a body to be cleaned 2 such as a steel part having oil adhered to its surface by a quenching process, that is, the oil content from the surface of the body to be cleaned 2 Is a cleaning device for removing the water, and includes a single cleaning tank 3 and a plurality of cleaning liquid tanks 4, 5, 6 provided in accordance with the number of cleaning steps. In the present embodiment, the cleaning process includes a rough cleaning process, a main cleaning process, and a rinse cleaning process. Correspondingly, a rough cleaning liquid tank 4, a main cleaning liquid tank 5, Three cleaning liquid tanks of the rinse cleaning liquid tank 6 are provided. The cleaning liquid in each of the cleaning liquid tanks 4, 5, 6 is sequentially supplied to the single cleaning tank to clean the surface of the object to be cleaned 2, and returned to the original cleaning liquid tanks 4, 5, 6. .
[0016]
The cleaning tank 3 includes a body to be cleaned inlet 7 and a body outlet 8 to be cleaned as an openable / closable inlet / outlet for taking in and out the body 2 to be cleaned. Each of 8 is closed with doors 9 and 10 that can be freely opened and closed.
[0017]
A shower nozzle 11 for spraying the cleaning liquid onto the object to be cleaned 2 is provided inside the cleaning tank 3, and an electric motor or the like is provided so that the entire surface of the object to be cleaned 2 can be cleaned. A rotary table 13 driven by a prime mover 12 is disposed. Although not limited, the rotary table 13 is of a type in which the rotation direction repeatedly changes, and the rotation speed can be freely changed.
[0018]
The cleaning tank 3 includes an air blow nozzle 16 connected to an air source 15 through a valve 14. In the liquid draining process after the rinsing cleaning process, the cleaning liquid is removed from the surface of the object to be cleaned 2 by blowing air from the air blow nozzle 16 to the object to be cleaned 2.
[0019]
A blower 17 is connected to the cleaning tank 3 as air forced discharge means for forcibly discharging the air in the tank. This is for preventing vapor from leaking from the cleaning object outlet 8 when taking out the cleaning object 2 from the cleaning tank 3 and protecting equipment around the cleaning tank 3. That is, in the cleaning tank 3, cleaning is performed with a warm water cleaning solution in order to obtain a high cleaning effect. For this reason, after completion of the cleaning process, the cleaning tank 3 is filled with steam. Therefore, after the liquid draining process is completed or in a steam discharge process performed in parallel with the liquid draining process, the blower 17 is operated to force the steam from the cleaning tank through the steam discharge pipe 18. If it is made to discharge | emit, even if it opens the door 10 of the said to-be-cleaned body outlet 8 after that, a vapor | steam does not leak out.
[0020]
A chip collecting recess 19 for collecting the chips adhering to the surface of the object to be cleaned 2 is formed in the lower part of the cleaning tank 3, and the chip collecting recess 19 includes the chip collecting recess 19. In order to capture and collect the powder, a magnet and a net (not shown) are provided.
[0021]
The cleaning liquid in the cleaning liquid tanks 4, 5, 6 is supplied to the cleaning tank 3 by the cleaning liquid pump 20. The three cleaning liquid tanks 4, 5, 6 are connected to the suction port 20 a side of the cleaning liquid pump 20 through a rough cleaning liquid introduction valve 21, a main cleaning liquid introduction valve 22, and a rinse cleaning liquid introduction valve 23, respectively. Has been. On the other hand, the cleaning tank 3 returns the cleaning liquid supplied from the three cleaning liquid tanks 4, 5, 6 to the original tanks 4, 5, 6. The three cleaning liquid tanks 4, 5, and 6 are connected via a return valve 24, a main cleaning liquid return valve 25, and a rinse cleaning liquid return valve 26.
[0022]
Each of the three cleaning liquid tanks 4, 5, 6 is provided with a heater 27 of an appropriate type for heating the cleaning liquid therein to a temperature at which a high cleaning effect can be obtained, for example, about 50 to 90 ° C. It has been.
[0023]
Each of the three cleaning liquid tanks 4, 5, and 6 is an oil / liquid separator, and includes an oil content recovery device 29 of an appropriate type known per se. The oil recovery device 29 recovers the oil floating on the liquid surface of the cleaning liquid returned from the cleaning tank 3 to the tanks 4, 5, 6 and purifies the cleaning liquid.
[0024]
In the rough cleaning liquid tank 4, the oil contained in the cleaning liquid naturally floats to the liquid level, and the oil in the rough cleaning liquid tank 4 is recovered from the liquid level by the oil recovery device 29. Is purified.
[0025]
On the other hand, in the present embodiment, a special configuration shown in FIGS. 2 to 6 is employed in order to more reliably collect oil in the main cleaning liquid tank 5 and the rinse cleaning liquid tank 6 as the oil / liquid separator. is doing. The main cleaning liquid tank 5 and the rinsing cleaning liquid tank 6 according to the present embodiment have the same configuration, and FIGS. 2 and 3 are perspective views showing the internal structure of the tanks 5 and 6, respectively. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3, and FIGS. 5 and 6 are front views showing the state of the liquid level in the tank.
[0026]
As shown in FIGS. 2 and 3, a first partition wall 31 and a second partition wall 32 are provided inside the tank body 30 as an oil / liquid separation tank of the main cleaning liquid tank 5 and the rinse cleaning liquid tank 6. ing. The first partition wall 31 defines a primary oil / liquid separation region 33 and a secondary oil / liquid separation region 34 in the tank body 30. The first partition wall 31 includes an overflow edge 35 that allows the cleaning liquid L as the processing liquid to overflow from the primary oil-liquid separation region 33 side to the secondary oil-liquid separation region 34 side. The overflow edge 35 defines the highest water level of the primary oil-liquid separation region 33.
[0027]
As shown in FIG. 4, the first partition wall 31 includes an inclined surface 37 extending downward from the overflow edge 35 toward the upstream end 36 of the secondary oil-liquid separation region 34, so that the overflow The cleaning liquid L overflowed from the edge portion 35 flows along the inclined surface 37 and gently flows into the secondary oil liquid separation region 34.
[0028]
On the other hand, as shown in FIG. 2, the second partition wall 32 allows the primary oil-liquid separation region 33 to communicate with each other at the lower portion thereof, and is partitioned at the upper portion thereof. The liquid separation region 33 is divided into an upstream region 33a and a downstream region 33b that communicate with each other at the lower part thereof. The cleaning liquid L that has flowed into the upstream region 33a from the liquid inlet 38 of the tank body 30 passes through the communication port 39 formed in the lower portion of the second partition wall 32, and the first partition wall 31 is in contact with the first partition wall 31. It flows into the downstream area 33b.
[0029]
The oil recovery unit 29 is connected to the upstream region 33 a of the primary oil-liquid separation region 33. In the upstream region 33 a, large oil droplets contained in the dirty cleaning liquid L float on the liquid surface and are recovered by the oil recovery device 29. Accordingly, a cleaning liquid that does not contain large oil droplets accumulates in the lower portion of the upstream area 33a, and the cleaning liquid that does not contain large oil droplets passes through the lower communication port 39 to the downstream area 33b. L will flow in.
[0030]
On the other hand, as shown in FIGS. 2 and 3, the secondary oil-liquid separation region 34 is formed with a bent flow path 40, which is a downstream end 41 of the bent flow path 40 and below the tank body 30. A liquid outlet 42 is formed at the bottom. By providing the bent flow path 40, the flow path of the cleaning liquid L in the secondary oil-liquid separation region 34 is lengthened, so that the floating time of fine oil droplets contained in the cleaning liquid L to the liquid surface is increased. The oil-liquid separation effect in the secondary oil-liquid separation region 34 can be improved.
[0031]
In the present embodiment, as clearly shown in FIG. 3, a plurality of, specifically, six bent flow path forming partition plates 43 are adjacent to each other in the secondary oil-liquid separation region 34. However, the present invention is not limited to this, and for example, a partition plate extending in a spiral shape when viewed from above is provided. It is also possible to form the bent channel in a spiral shape by arranging it in the secondary oil / liquid separation region.
[0032]
As shown in FIG. 5, the height of each of the bent flow path forming partition plates 43 is such that the cleaning liquid L is fully accumulated in the tank body 30 and the predetermined amount of water is in the cleaning liquid L. As shown in FIG. 6, when the cleaning liquid L flows out from the liquid outlet 42 and the liquid level in the secondary oil / liquid separation region 34 is lowered, the upper end of the secondary oil / liquid separation area 34 is exposed to a height exposed from the liquid surface. ing.
[0033]
As shown in FIGS. 2 and 3, the secondary oil-liquid separation region 34 is provided with an air discharge pipe 45 that constitutes bubble generating means together with an air pump 44 (see FIG. 1). The air discharge pipe 45 is disposed on the bottom surface of the tank body 30 so as to extend along the bent flow path 40. A large number of small air discharge holes 46 are formed at equal intervals along the length direction of the air discharge pipe 45, and the operation of the air pump 44 causes the large number of air discharge holes 46 to enter the cleaning liquid L. By the air supplied to the tank, fine bubbles rise from the bottom of the tank body 30 along the bent flow path 40 (see FIG. 5). These fine bubbles cause fine oil droplets contained in the cleaning liquid L to float to the liquid surface.
[0034]
As shown in FIGS. 5 and 6, the oil recovery device 29 is connected to the secondary oil-liquid separation region 34 as well as the primary oil-liquid separation region 33. The fine oil droplets that have floated to the liquid surface of the secondary oil / liquid separation region 34 are recovered by the oil content recovery device 29. For this reason, a clean cleaning liquid from which oil has been sufficiently removed flows out from the liquid outlet 42. As already described, since the liquid outlet 42 is formed in the lower part of the tank body 30, fine oil droplets floating on the liquid surface do not flow out of the liquid outlet 42.
[0035]
The cleaning apparatus according to the present embodiment is used as follows.
[0036]
The cleaning operation process proceeds in order of a rough cleaning process, a main cleaning process, a rinse cleaning process, a liquid draining process, and a vapor discharging process.
[0037]
In FIG. 1, the door 9 of the body to be cleaned 7 is opened, the body 2 to be cleaned is inserted into the cleaning tank 3, placed on the rotary table 13, and the door 9 is closed. Then, the washing tank 3 is sealed. The rotary table 13 repeats forward rotation and reverse rotation from the start of the rough cleaning process to the end of the liquid draining process while the object to be cleaned 2 is placed.
[0038]
The rough cleaning process is as follows.
[0039]
When the rough cleaning liquid introduction valve 21 and the rough cleaning liquid return valve 24 are opened and the cleaning liquid pump 20 starts to operate, the cleaning liquid L in the rough cleaning liquid tank 4 is sprayed from the shower nozzle 11 and the object to be cleaned is 2 sprays. As a result, the oil adhering to the surface of the object to be cleaned 2 is washed away. Since the object to be cleaned 2 is reversely rotated by the rotary table 13, the cleaning liquid L hits the entire surface and the entire surface is cleaned. The cleaning liquid L that has cleaned the object to be cleaned 2 naturally flows down from the chip recovery recess 19 and returns to the rough cleaning liquid tank 4.
[0040]
When the rough cleaning for a predetermined time is completed, the cleaning liquid pump 20 is stopped, the rough cleaning liquid introduction valve 21 and the rough cleaning liquid return valve 24 are both closed, and the rough cleaning process is completed.
[0041]
The cleaning liquid L returned from the cleaning tank 3 to the rough cleaning liquid tank 4 contains a large amount of oil adhering to the surface of the object 2 to be cleaned. This oil is contained in the rough cleaning liquid tank 4. The oil content recovery apparatus until the cleaning liquid L in the rough cleaning liquid tank 4 naturally floats on the liquid surface and the cleaning liquid L in the rough cleaning liquid tank 4 is next involved in the cleaning, that is, until the next rough cleaning process starts. 29.
[0042]
The main cleaning process is as follows.
[0043]
When the main cleaning liquid introduction valve 22 is opened and the cleaning liquid pump 20 starts to operate, the cleaning liquid L in the main cleaning liquid tank 5 is sprayed from the shower nozzle 11 and sprayed onto the object to be cleaned 2. As a result, the oil adhering to the surface of the object to be cleaned 2 is washed away. At this time, since the main cleaning liquid return valve 25 is closed, the liquid level of the cleaning liquid L in the cleaning tank 3 eventually rises, and the object to be cleaned 2 is immersed in the cleaning liquid. Since the to-be-cleaned body 2 is turned and rotated by the rotary table 13, the to-be-cleaned body 2 is cleaned in the immersed state.
[0044]
When the main cleaning for a predetermined time is completed, the cleaning liquid pump 20 is stopped, the main cleaning liquid introduction valve 22 is closed, and the main cleaning liquid return valve 25 is opened. As a result, the cleaning liquid L accumulated in the cleaning tank 3 naturally flows down from the chip collecting recess 19 and returns to the main cleaning liquid tank 5 to complete the main cleaning process.
[0045]
The cleaning liquid L returned from the cleaning tank 3 is stored in the main cleaning liquid tank 5 by the oil recovery device 29 until it is involved in the next cleaning, that is, until the next main cleaning process starts. Purified. Specifically, as shown in FIG. 2, the cleaning liquid L that has returned from the cleaning tank 3 passes from the upstream region 33 a of the primary oil-liquid separation region 33 through the lower communication port 39 to the downstream side. It moves to the region 33b, overflows from the overflow end 35, flows on the inclined surface 37, and reaches the upstream end 36 of the secondary oil-liquid separation region 34, that is, the upstream end 36 of the bent flow path 40. And move quietly. In the upstream region 33 a of the primary oil-liquid separation region 33, large oil droplets contained in the cleaning liquid L float on the liquid surface, and this oil component is recovered by the oil recovery device 29.
[0046]
In the secondary oil / liquid separation region 34, the air pump 44 is operated and air is discharged from the air discharge pipe 45. As a result, fine bubbles rise from the bottom surface of the tank body 30 and are adsorbed by the fine bubbles, so that the fine oil droplets in the cleaning liquid L surely float on the liquid surface. The oil component floating on the liquid surface is recovered by the oil component recovery device 29.
[0047]
The rinse cleaning process is as follows.
[0048]
In FIG. 1, when the rinse cleaning liquid introduction valve 23 and the rinse cleaning liquid return valve 26 are opened and the cleaning liquid pump 20 starts to operate, the cleaning liquid L in the rinse cleaning liquid tank 6 is sprayed from the shower nozzle 11, Sprays onto the object to be cleaned 2. As a result, the oil adhering to the surface of the object to be cleaned 2 is washed away. Since the object to be cleaned 2 is reversely rotated by the rotary table 13, the cleaning liquid L hits the entire surface and the entire surface is cleaned. The cleaning liquid L that has cleaned the object to be cleaned 2 naturally flows down from the chip recovery recess 19 and returns to the rinse cleaning liquid tank 6.
[0049]
During the rinse cleaning step, the cleaning liquid L in the rinse cleaning liquid tank 6 circulates between the cleaning tank 3 and oil is recovered in the rinse cleaning liquid tank 6. That is, at the beginning of the rinse cleaning step, as shown in FIG. 6, in the rinse cleaning liquid tank 6, the cleaning liquid L in the secondary oil / liquid separation region 34 is sent from the liquid outlet 42 to the cleaning tank 3. Thus, the liquid level in the secondary oil / liquid separation region 34 is lowered. Then, the upper end portion of the bent channel forming partition plate 43 is exposed from the liquid surface, and the bent channel 40 appears in the secondary oil-liquid separation region 34. The lowering of the liquid level in the secondary oil / liquid separation region 34 continues until the cleaning liquid L starts to return from the cleaning tank 3 to the rinse cleaning liquid tank 6.
[0050]
The cleaning liquid L that has reached the cleaning tank 3 and has come into contact with the object to be cleaned 2 naturally flows down due to the height difference between the cleaning tank 3 and the rinse cleaning liquid tank 6, and from the liquid inlet 38 of the rinse cleaning liquid tank 6. It flows into the upstream region 33 a of the primary oil-liquid separation region 33. In the upstream region 33a, large oil droplets contained in the cleaning liquid L float on the liquid surface, and the large oil droplets are recovered by the oil content recovery device 29.
[0051]
In the lower part of the upstream region 33 a of the primary oil-liquid separation region 33, there is a cleaning liquid L that does not contain the large oil droplets, and this cleaning solution L passes through the lower communication port 39 and the downstream region. 33b, overflows from the overflow end 35, flows on the inclined surface 37, and reaches the upstream end 36 of the secondary oil-liquid separation region 34, that is, the upstream end 36 of the bent flow path 40. Move quietly.
[0052]
In the secondary oil / liquid separation region 34, the cleaning liquid L moves along the bent flow path 40, and the cleaning liquid L is continuously sent out from the liquid outlet 42 to the cleaning tank 3. Such circulation of the cleaning liquid L continues until the end of the rinse cleaning step. In the secondary oil / liquid separation region 34, fine oil droplets contained in the cleaning liquid L float on the liquid surface as the cleaning liquid L moves along the bent flow path 40. Since the flow path is elongated by bending and extending, it takes time for the cleaning liquid L to reach the downstream end 41. For this reason, the time required for the fine oil droplets to sufficiently float on the liquid surface can be secured, and the cleaning effect of the cleaning liquid L is enhanced. The fine oil droplets floating on the liquid surface are collected by the oil collecting device 29.
[0053]
When the rinse cleaning for a predetermined time is completed, the cleaning liquid pump 20 is stopped, the rinse cleaning liquid introduction valve 23 and the rinse cleaning liquid return valve 26 are both closed, and the rinse cleaning process is completed. At the end of the rinsing process, since all the cleaning liquid L has returned from the cleaning tank 3 to the rinsing cleaning liquid tank 6, the liquid level in the secondary oil-liquid separation region 34 is in the original state, that is, in FIG. As shown, the upper end portion of the bent flow path forming partition plate 43 is returned to the sunk state.
[0054]
When the rinsing cleaning process is completed, the oil recovery device 29 in the rinsing cleaning liquid tank 6 until the cleaning liquid L is involved in the next cleaning, that is, until the next rinsing cleaning process starts. Purified. Specifically, in the primary oil-liquid separation region 33, the oil component that naturally floats on the liquid surface is recovered by the oil component recovery device 29.
[0055]
On the other hand, in the secondary oil / liquid separation region 34, the air pump 44 is operated and air is discharged from the air discharge pipe 45. As a result, fine bubbles rise from the bottom surface of the tank body 30 and are adsorbed by the fine bubbles, so that the fine oil droplets in the cleaning liquid L surely float on the liquid surface. The oil component floating on the liquid surface is recovered by the oil component recovery device 29.
[0056]
When the three cleaning steps are completed as described above, the liquid draining step is started. That is, in FIG. 1, air is blown from the air blow nozzle 16 toward the object 2 to be cleaned, and moisture adhering to the surface of the object 2 to be cleaned is removed. Since the to-be-cleaned body 2 is rotated in the reverse direction by the rotary table 13, air is blown over the surface, and the entire surface is efficiently dried.
[0057]
After the liquid draining process or in parallel with the liquid draining process, as a steam discharge process, the blower 17 starts operating, and the steam in the cleaning tank 3 is forcibly discharged through the steam discharge pipe 18. It is done.
[0058]
Thereafter, the door 10 of the cleaning object outlet 8 is opened and the cleaning object 2 is taken out. At this time, since no steam is present in the cleaning tank 3, there is no adverse effect on peripheral devices due to the outflow of steam.
[0059]
In the above description, the rough cleaning step is performed by a shower cleaning method, the main cleaning step is performed by a dip cleaning method, and the rinse cleaning step is performed by a shower cleaning method. A method, an immersion cleaning method, an air bubbling method, and the like can be appropriately selected from a plurality of known cleaning methods.
[0060]
Further, the cleaning liquid purification method in the main cleaning liquid tank 5 and the cleaning liquid purification method in the rinse cleaning liquid tank 6 can be interchanged with each other, or can be adapted to any one of the methods. The tank 4 can also be configured in the same manner as the main cleaning liquid tank 5 and the rinsing cleaning liquid tank 6, and the rough cleaning liquid can be purified in the same manner as the cleaning liquid purification in the tanks 5 and 6. .
[Brief description of the drawings]
FIG. 1 is a circuit diagram of a cleaning apparatus including an oil-liquid separator according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an internal structure of a main cleaning liquid tank and a rinsing cleaning liquid tank as an oil-liquid separator according to an embodiment of the present invention.
FIG. 3 is a plan view showing an internal structure of the main cleaning liquid tank and a rinsing cleaning liquid tank.
4 is a cross-sectional view taken along arrow IV-IV in FIG. 3;
FIG. 5 is a front view showing a state of a liquid level during a non-cleaning operation of a rinse cleaning liquid tank.
FIG. 6 is a front view showing the state of the liquid level during the cleaning operation of the rinse cleaning liquid tank.
[Explanation of symbols]
29 Oil recovery unit
30 Tank body (oil-liquid separation tank)
31 First bulkhead
32 Second partition
33 Primary oil-liquid separation area
34 Secondary oil-liquid separation area
35 Overflow edge
36 Upstream end of bent channel
37 Inclined surface
38 Liquid inlet
40 Bent channel
41 Downstream end of bent channel
42 Liquid outlet
43 Bent channel forming partition plate
45 Air release pipe (bubble generation means)
L Treatment liquid

Claims (3)

An oil-liquid separation tank having a liquid inlet and a liquid outlet is divided into an upstream primary oil-liquid separation region and a secondary oil-liquid separation region on the bent flow path side, and the secondary oil from the primary oil-liquid separation region side. A first partition wall having an overflow edge with an inclined surface extending downward toward the upstream end of the bent flow channel allowing the processing liquid to overflow and move toward the liquid separation region; and the primary oil A second partition wall that allows the liquid separation region to communicate with each other at the lower portion thereof and partition at the upper portion thereof, and the liquid outlet is formed at a downstream end portion of the bent flow passage and at a lower portion of the oil-liquid separation tank. Do Ri, and the primary hydraulic fluid upstream of the liquid surface of the second partition in the separation region, wherein the secondary hydraulic fluid liquid level of the separation area, the hydraulic fluid becomes so as to collect the oil in oil recovery device isolation apparatus. The oil-liquid separator according to claim 1, further comprising bubble generating means for generating bubbles from the bottom of the oil-liquid separation tank along the bent flow path. The partition plate that forms the bent flow path is submerged in the treatment water when the treatment liquid in the oil-liquid separation tank has a predetermined full water amount, and the treatment water comes out from the liquid outlet and the liquid face its upper end is in allowed height exposed by the drops, the oil-liquid separation device according to claim 1 or 2.

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