JP3973150B2 - Sludge separation device, sludge recovery device, and sludge separation method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sludge separation device, a sludge recovery device, and a sludge separation method that are used for separating sludge from a turbid liquid in which sludge and water are mixed and purifying the turbid liquid.
[0002]
[Prior art]
Conventionally, sludge separators and sludge collectors that separate and recover sludge in turbid liquids send turbid liquid to a sedimentation tank for sludge treatment to precipitate sludge, drain the sludge with a belt conveyor and collect it. (For example, refer to Patent Document 1).
Here, the sedimentation tank is provided with an overflow weir, and the clear water in the upper layer of the sedimentation tank flowing out from the overflow weir is collected by a return hose.
[0003]
[Patent Document 1]
JP-A-5-293495 (pages 2 and 3, FIG. 2)
[0004]
[Problems to be solved by the invention]
However, in the sludge treatment and recovery mechanism of Patent Document 1, the sludge in the turbid liquid is separated by causing the water in the upper layer out of the water sent to the settling tank to flow out from the overflow weir. The turbid liquid when sent to the settling tank is in the upper layer of the settling tank and may flow directly to the overflow weir side and out of the overflow weir, and further separation and purification of sludge is desired. In addition, the sludge separation means using the overflow weir requires draining the sedimentation tank where the sludge has settled, and it takes time and waste to dispose of the separated sludge. there were.
[0005]
An object of the present invention is to provide a sludge separation device, a sludge recovery device, and a sludge separation method that efficiently sink and separate sludge in such a turbid liquid and prevent sludge from flowing out.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the sludge separation device according to claim 1 is a sludge separation device that separates sludge from a turbid liquid in which sludge and water are mixed and purifies the turbid liquid. A sludge separation tank having an outlet and an inclined surface inclined from the periphery of the discharge port toward the discharge port, and an opening above the bottom surface in the sludge separation tank, A plurality of separation plates inclined downward from the inner wall of the opening are alternately projected, A separation cylinder erected via a holding part so as to open a predetermined interval with respect to the inner wall of the sludge separation tank; The tip is provided on the right or left side, Between the inner wall of the sludge separation tank and the outer wall of the separation cylinder Upper layer A supply pipe for supplying turbid liquid to the drain pipe, a drain pipe provided with a drain outlet for draining outside the sludge separation tank in the vicinity of the upper end of the separation cylinder,
It is characterized by having.
[0007]
According to the first aspect of the present invention, when the turbid liquid is supplied by the supply pipe between the inner wall of the sludge separation tank and the separation cylinder, the turbid liquid rotates along the outer peripheral surface of the separation cylinder. A flow is formed toward the discharge port side and the drain port side located near the upper end in the separation cylinder. Therefore, the sludge sinks to the inclined surface of the bottom surface portion due to its own weight when circulating along the separation cylinder of the sludge separation tank. The sludge can move to the discharge port along the inclined surface and be discharged from the discharge port.
The turbid liquid that enters the inner wall side of the separation cylinder from the lower end side of the separation cylinder further sinks sludge due to its own weight while ascending in the standing separation cylinder. Therefore, the sludge is prevented from rising to the upper layer part of the separation cylinder, and the turbid liquid floating on the upper layer part of the separation cylinder becomes purified water from which the sludge is separated, and can be taken from the drain port.
[0008]
The sludge separator according to claim 2 is the sludge separator according to claim 1, Of the drain pipe The filter is installed to face the drain and remove sludge.
[0009]
According to the second aspect of the present invention, since the filter is installed so as to face the drain port, the sludge in the turbid liquid that has passed through the sludge separator can be removed by the filter. And the turbid liquid can be filtered.
[0010]
The sludge separation apparatus according to claim 3 is the sludge separation apparatus according to claim 1 or 2, wherein the sludge separation tank has an overflow pipe having an opening above the installation position of the drain outlet of the drain pipe. It is provided with.
[0011]
According to the invention described in claim 3, by providing the overflow pipe, the turbid liquid overflowing from the sludge separation tank can be circulated so as to be filtered again, and the turbid liquid containing a large amount of sludge flows out. Can be prevented.
[0012]
The sludge separation device according to claim 4 is a sludge separation device including a plurality of sludge separation mechanisms for separating sludge from a turbid liquid in which sludge and water are mixed and purifying the turbid liquid. A sludge separation tank having a discharge port on the bottom surface and an inclined surface inclined from the periphery of the discharge port toward the discharge port; That It has an opening above the bottom in the sludge separation tank, A plurality of separation plates inclined downward from the inner wall of the opening are alternately projected, A separation cylinder erected via a holding part so as to open a predetermined interval with respect to the inner wall of the sludge separation tank; The tip is provided on the right or left side, Between the inner wall of the sludge separation tank and the outer wall of the separation cylinder Upper layer And a drain pipe installed in order to distribute water to the next sludge separation tank.
[0013]
According to the invention described in claim 4, the sludge separation device purifies the turbid liquid in which the sludge and the water are mixed by the plurality of sludge separation mechanisms. When purifying, when the turbid liquid is supplied through the supply pipe between the inner wall of the sludge separation tank and the outer wall of the separation cylinder in the sludge separation mechanism, the turbid liquid is applied to the outer wall of the separation cylinder. When it circulates along, it sinks to the inclined surface of the bottom part of the sludge separation layer by its own weight and is discharged from the discharge port.
In addition, the sludge separation device becomes purified water in a state in which sludge sinks in the flow of the turbid liquid from the lower end side to the upper end side of the separation cylinder, and is sent from the discharge port to the next sludge separation mechanism through the drain pipe. In the same manner, the turbid liquid or purified water is further purified.
[0014]
The sludge recovery device according to claim 5 is a turbid liquid recovery tank for recovering a turbid liquid containing cleaning water supplied to the work and sludge from the work, and a turbid liquid recovery tank. The said supply pipe | tube which sends the turbid liquid sent to the sludge separation apparatus of any one of Claim 1 thru | or 4, The turbid liquid supplied by this supply pipe | tube is isolate | separated into water and sludge. And a sludge separation device according to any one of claims 4 to 4.
[0015]
According to the fifth aspect of the present invention, sludge contained in a workpiece used as a lubricating liquid or cleaning water is recovered in a turbid liquid recovery tank, separated by a sludge separator, and the cleaning water is purified. can do. For this reason, the wash water can be recovered and reused many times, which contributes to cost reduction and prevention of contamination.
[0016]
The recovery device according to the present invention includes, for example, a pump installed in a supply pipe that sends the turbid liquid in the turbid liquid recovery tank to the sludge separation device, and the concentration of sludge in the turbid liquid purified by the sludge separation device. And a pump motor inverter control device that controls the rotation of the pump based on the concentration of sludge in the turbid liquid measured by the turbidimeter.
With such a configuration, the number of revolutions of the pump can be controlled by the detected concentration of sludge in the turbid liquid, so the purification capacity is controlled by automatically adjusting the flow rate and flow rate of the turbid liquid flowing into the sludge separator. be able to.
[0017]
The sludge separation method according to claim 6, wherein the bottom surface is provided with a discharge port, and an inclined surface inclined toward the discharge port, and a sludge having a separation cylinder standing by a holding portion at a position facing the discharge port. For the separation tank, remove the turbid liquid containing sludge and water from the outer wall of the separation cylinder. When Inner wall of sludge separation tank When Between Upper layer Steps to supply And The supplied turbid liquid circulates along the outer wall of the separation cylinder and the inner wall of the sludge separation tank, and the sludge sinks to the discharge port side along the inclined surface by its own weight. And , The sludge that flows into the separation cylinder and rises collides with a plurality of separation plates that are inclined and projecting downward from the inner wall of the separation cylinder, and sinks to the discharge port side by the weight of the sludge. Steps, A step of draining purified water in a state where sludge concentration is reduced by a drain pipe having a drain port in the vicinity of the upper end of the separation cylinder in the separation cylinder to the outside of the sludge separation tank. And , Including.
[0018]
According to the invention described in claim 6, in the sludge separation method, the turbid liquid circulates along the outer wall of the separation cylinder and the inner wall of the sludge separation tank, and sinks to the discharge port side along the inclined surface by its own weight. The sludge in the turbid liquid is separated, and the sludge settled on the inclined surface is smoothly guided to the discharge port and collected, so that the sludge in the turbid liquid can be easily removed and recovered, and the water is purified. can do. Moreover, the purified water can be drained out of the sludge separation tank in a state where the concentration of sludge is reduced by the drain pipe having the drain port near the upper end of the separation cylinder.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
In the description of each embodiment, the same components are denoted by the same reference numerals, and redundant description is omitted.
[0020]
[ Reference embodiment ]
First, the sludge collection | recovery apparatus concerning this invention is demonstrated. Here, the sludge recovery device will be described as a configuration including two sludge separation devices (sludge separation mechanisms).
FIG. 1 is a schematic view of a sludge recovery device. FIG. 2 is a plan view of the sludge separation mechanism. FIG. 3 is a longitudinal sectional view of the sludge separation mechanism.
[0021]
As shown in FIG. 1, the sludge recovery device 1 separates the sludge S from the turbid liquid T sent from the first turbid liquid recovery tank 20 that recovers the turbid liquid T containing the sludge S, and removes the turbid liquid T from the turbid liquid T. The first sludge separation mechanism 2 that purifies the purified water and the second sludge separation mechanism 3 that further purifies the purified water purified by the first sludge separation mechanism 2. The sludge recovery device 1 can be further purified by the second sludge separation mechanism 3 as necessary depending on the degree of purification of the purified water purified by the first sludge separation mechanism 2.
[0022]
The sludge S is, for example, metal powder that has come out of the workpiece 16 when being polished by the polishing machine 15 or the like. The polishing machine 15 is a machine tool that finely finishes the surface roughness of the workpiece 16 by pressing the rotating abrasive 15a against the workpiece 16 on the table 15b. The workpiece 16 is made of, for example, a punched aluminum alloy substrate for a magnetic disk.
[0023]
Wash water W is covered processing A liquid for cleaning the object 16, for example, water such as industrial water, which is stored in the cleaning water tank 17. The cleaning water W in the cleaning water tank 17 is covered from the nozzle 19 by the pump 18. processing Supplied to the object 16, processing The metal powder adhering to the object 16 is washed away. The washing water W flows into the first turbid liquid collection tank 20 as a turbid liquid T in which the sludge S made of metal powder is mixed in the washing water W by washing away the metal powder.
The “turbid liquid recovery tank” in the scope of claims corresponds to the “first turbid liquid recovery tank 20”.
[0024]
The turbid liquid T in the first turbid liquid recovery tank 20 is supplied between the inner wall 4 d of the first sludge separation tank 4 and the outer wall 5 b of the first separation cylinder 5 by the pump 21 and the first supply pipe 7. . The pump 21 adjusts the flow rate of the turbid liquid T sent to the first sludge separation tank 4 to a desired flow rate.
The pump 21 does not have to be provided because the turbid liquid T flows by disposing the first turbid liquid recovery tank 20 at a position higher than the first sludge separation tank 4.
[0025]
The first sludge separation mechanism 2 includes a first sludge separation tank 4, a first separation cylinder 5, a first supply pipe 7, and a first drain pipe 8. Here, the first sludge separation mechanism 2 is a primary purification device that removes sludge S having particularly large particles in the turbid liquid T.
The “sludge separation mechanism (sludge separation device)” in the claims corresponds to “the first sludge separation mechanism 2 and the second sludge separation mechanism 3”.
[0026]
The second sludge separation mechanism 3 includes a second sludge separation tank 9, a second separation cylinder 10, a second supply pipe 12, and a second drain pipe 13. Here, the second sludge separation mechanism 3 is a secondary purification device that further purifies the turbid liquid T purified once by the first sludge separation mechanism 2 and removes sludge S having small particles.
[0027]
The first sludge separation tank 4 has a funnel 4e having a discharge port 4b disposed on the bottom surface portion 4a and an inclined surface 4c inclined from the periphery of the discharge port 4b toward the discharge port 4b. The upper surface is a drum-like container having a circular cross section with an opening 4f. The first sludge separation tank 4 is a container having an inner diameter of 400 mm and a height H2 of 700 mm, for example. In addition, the height H2 of the 1st sludge separation tank 4 can prevent that the sludge S floats to an upper layer part, so that the height H2 is made high.
[0028]
The funnel 4e is a tool for pouring the sludge S sinking to the bottom surface portion 4a and the turbid liquid T of the bottom surface portion 4a into the discharge port 4b shorter than the inner diameter of the first sludge separation tank 4. The inclined surface 4c is a conical oblique surface centered on the discharge port 4b. Vent 4b The first overflow pipe 22 has a nominal diameter of 25 mm, for example. A first filter 24 for filtering and removing the sludge S is installed downstream of the discharge port 4b.
In addition, the “sludge separation tank” in the claims is “the first sludge separation tank”. Tank 4 and second sludge separation tank 9 ”.
[0029]
The first separation cylinder 5 is a cylindrical container installed in the upper layer portion 5f from the bottom surface portion 4a in the first sludge separation tank 4, and the lower opening portion 5a is disposed above the bottom surface portion 4a. The upper opening 5 c is arranged at a position higher than the opening 22 a of the first overflow pipe 22. The first separation cylinder 5 is placed in the air fishing state with a predetermined interval L1 from the inner wall 4d of the first sludge separation tank 4 by the holding portion 6 fixed to the first sludge separation tank 4 and the first drain pipe 8. It is installed.
As shown in FIG. 3, the holding portion 6 is constructed between the inner wall 4d of the first sludge separation tank 4 and the first separation cylinder 5, and the lower opening 5a is the discharge port 4b of the bottom portion 4a. The first separation cylinder 5 is held so as to be arranged at an appropriate height H1. The first separation cylinder 5 is formed of, for example, a cylinder having an inner diameter of 160 mm and a height of 300 mm. The height H1 from the discharge port 4b of the first separation cylinder 5 is, for example, 320 mm, and the flow rate of the turbid liquid T discharged from the discharge port 4b is, for example, 10.5 L / min.
The “separation cylinder” in the claims corresponds to the “first separation cylinder 5 and the second separation cylinder 9”.
[0030]
As shown in FIG. 1, the first supply pipe 7 transfers the turbid liquid T in the first turbid liquid recovery tank 20 between the inner wall 4 d of the first sludge separation tank 4 and the outer wall 5 b of the first separation cylinder 5. , The supply pipe. The turbid liquid T discharged from the first supply pipe 7 flows along the inner wall 4d of the first sludge separation tank 4 as a cyclone that spirals clockwise or counterclockwise. As shown in FIGS. 2 and 3, the supply port 7 a of the first supply pipe 7 is arranged near the inner wall 4 d of the upper layer portion of the first sludge separation tank 4 and is turbidly poured into the first sludge separation tank 4. The liquid T is provided toward the right or left side of the tip of the first supply pipe 7 so as to form a cyclone. As the first supply pipe 7, for example, a pipe having a nominal diameter of 20 mm is used. The supply port 7a is arrange | positioned 300 mm below from the upper end of the 1st sludge separation tank 4, for example. The flow rate of the turbid liquid T discharged from the supply port 7a is, for example, 1.5 m / s, and the flow rate is 16.5 L / min.
The “supply pipe” in the claims corresponds to “the first supply pipe 7 and the second supply pipe 12”.
[0031]
As shown in FIG. 1, the first drain pipe 8 has a drain port 8a for taking in the turbid liquid T of the upper layer portion 5f in the first separation cylinder 5 at one end, and the turbid liquid T at the other end. It has a discharge port 8 b for distributing water to the second turbid liquid recovery tank 23. As shown in FIG. 3, the first drain pipe 8 is inserted through the first sludge separation tank 4 and the first separation cylinder 5, and is installed on both of them. The first drain pipe 8 is bent in a L shape in front of the drain port 8a and opens toward the upper surface. The drain port 8 a is installed near the upper end in the first separation cylinder 5 and takes in the clear turbid liquid T in the upper layer portion 5 f in the first separation cylinder 5. The first drain pipe 8 is made of, for example, a pipe having a nominal diameter of 15 mm, and the drain port 8 a is disposed about 100 mm below the upper end of the first sludge separation tank 4.
The “drainage pipe” in the claims corresponds to the “first drainage pipe 8 and the second drainage pipe 13”.
[0032]
The first overflow pipe 22 causes the turbid liquid T in the first sludge separation tank 4 to flow to the second turbid liquid collection tank 23 when the turbid liquid T in the first sludge separation tank 4 exceeds a predetermined water level. It is a tube for. As shown in FIG. 3, the opening 22 a of the first overflow pipe 22 is installed on the inner wall 4 d of the first sludge separation tank 4 above the drain outlet 8 a of the first drain pipe 8. The first overflow pipe 22 is disposed, for example, 70 mm below the upper end of the first sludge separation tank 4.
The “overflow pipe” in the claims corresponds to the “first overflow pipe 22 and the second overflow pipe 26”.
[0033]
The first filter 24 is a net-like member or a sheet-like member for removing the sludge S in the turbid liquid T exiting from the discharge port 4b. In the turbid liquid T that has passed through the first filter 24, particularly large sludge S is completely removed, and purified water is sent to the second turbid liquid recovery tank 23.
The turbid liquid T (purified water) sent into the second turbid liquid recovery tank 23 is supplied to the second sludge separation tank 3 of the second sludge separation mechanism 3 through the second supply pipe 12 installed in the second turbid liquid recovery tank 23. 9 and purified in the same manner as the first sludge separation mechanism 2.
The “filter” in the claims corresponds to “the first filter 24 and the filter 25”.
[0034]
The second sludge separation tank 9 has the same shape as that of the first sludge separation tank 4, and includes a discharge port 9b and an inclined surface 9c inclined from the periphery of the discharge port 9b toward the discharge port 9b. It is a substantially drum-like container having 9e on the bottom surface portion 4a and having an opening 9f on the top surface. The funnel 9e is a tool for pouring the sludge S sinking to the bottom surface portion 9a and the turbid liquid T (purified water) of the bottom surface portion 9a into the discharge port 9b shorter than the inner diameter of the second sludge separation tank 9. . The inclined surface 9c is a conical oblique surface with the discharge port 9b as the center. A relatively fine second filter 25 for filtering and removing the turbid liquid T (purified water) is installed downstream of the discharge port 9b.
[0035]
The second separation cylinder 10 has the same shape as the first separation cylinder 5. The second separation cylinder 10 is a cylindrical container installed in the upper layer portion in the second sludge separation tank 9, and the lower opening 10a is disposed above the bottom surface 9a, and the upper opening 10c. Is disposed at a position higher than the opening 26 a of the second overflow pipe 26. The second separation cylinder 10 stands in a state of air fishing with a predetermined interval L2 from the inner wall 9d of the second sludge separation tank 9 by the holding portion 11 fixed to the second sludge separation tank 9 and the second drain pipe 13. It is installed. The holding part 11 is installed between the inner wall 9d of the second sludge separation tank 9 and the second separation cylinder 10, and the lower opening 10a is disposed at an appropriate height from the discharge port 9b of the bottom part 9a. Hold to be.
[0036]
The second supply pipe 12 has the same shape as the first supply pipe 7. The second supply pipe 12 has a second turbid liquid T (purified water) between the inner wall 9d of the second sludge separation tank 9 in the second turbid liquid recovery tank 23 and the outer wall 10b of the second separation cylinder 10. A supply port 12a is provided along the inner wall 9d of the sludge separation tank 9 so as to flow as a cyclone that spirals clockwise or counterclockwise.
[0037]
The second drain pipe 13 is a pipe for draining the purified water of the upper layer portion 10 f in the second separation cylinder 10 to the outside of the second sludge separation tank 9. The second drainage pipe 13 has a drainage port 13a for taking purified water of the upper layer portion 10f of the second separation cylinder 10 at one end, and the turbid liquid T (flowing through the second drainage pipe 13 at the other end. The purified water is connected to a valve 28 via a turbidimeter 27 that measures, for example, turbidity. The second drain pipe 13 is inserted through the second sludge separation tank 9 and the second separation cylinder 10 and is installed on both of them. The second drain pipe 13 is bent in a L shape in front of the drain port 13a and opens toward the upper surface. The drain port 13a is installed in the vicinity of the upper end in the second separation cylinder 10 and takes in clear purified water in the upper layer portion 10f in the second separation cylinder 10. The second drainage pipe 13 is provided with a valve 28 and a feed pipe 29 for sending a chemical that can be neutralized to the purified water purified and sending it to an adjustment tank (not shown) for pH adjustment, The water is branched to a recovery pipe 30 for flowing into a water storage tank 31 for reusing the cleaning water W so that the water can be controlled.
[0038]
The turbidimeter 27 measures the turbidity of the turbid liquid T, and is electrically connected to the pump 21 via a pump motor inverter control device 32. When the turbidity is lower than the set value, the pump motor inverter control device 32 controls the current of the pump 21 to increase the rotation speed and increase the flow velocity at which the turbid liquid T flows. When the turbidity is higher than the set value, the pump motor inverter control device 32 controls the current of the pump 21 to reduce the rotational speed to lower the flow velocity of the turbid liquid T, thereby making it easier to sink the sludge S. Purify so that the turbidity decreases.
[0039]
The water storage tank 31 is a tank for storing and reusing the turbid liquid T (purified water) purified by passing through the first sludge separation mechanism 2 and the second sludge separation mechanism 3. The water storage tank 31 may be used as the washing water tank 17 by supplying the collection pipe 30 to the washing water tank 17.
[0040]
Next, the operation of the sludge separation device and the sludge recovery device will be described.
As shown in FIG. 1, when the workpiece 16 is polished by the polishing machine 15, the pump 18 is turned on, and the cleaning water W in the cleaning water tank 17 is supplied from the nozzle 19 to the workpiece 16, The metal powder adhering to the workpiece 16 is washed away.
[0041]
The metal powder becomes sludge S and is mixed with the cleaning water W, and the cleaning water W becomes the turbid liquid T. The turbid liquid T is recovered and flows into the first turbid liquid recovery tank 20. Sludge S composed of large particles in the turbid liquid T flowing into the first turbid liquid recovery tank 20 sinks to the inner bottom of the first turbid liquid recovery tank 20 due to its own weight. The upper turbid liquid T in the first turbid liquid recovery tank 20 is clear after the first purification because the sludge S sinks due to its own weight.
[0042]
The turbid liquid T is supplied between the outer wall of the first separation cylinder 5 and the inner wall 4d of the first sludge separation tank 4 via the first supply pipe 7 and the pump 21 (step 1) (see FIG. 6). . The content of the sludge S in the turbid liquid T when supplied from the first supply pipe 7 into the first sludge separation tank 4 is, for example, about 1117.5 ppm.
[0043]
The supply port 7a of the first supply pipe 7 is disposed in the circumferential direction near the inner wall 4d of the upper layer portion of the first sludge separation tank 4, and the turbid liquid T discharged from the supply port 7a is the first. A vortex is wound around the sludge separation tank 4 so as to draw a cyclone. Then, the sludge S made of relatively large particles in the turbid liquid T descends while rotating near the inner wall 4d by its own weight, and sinks to the inclined surface 4c of the bottom surface portion 4a. The settled sludge S moves to the discharge port 4b side by its own weight, the flow of the turbid liquid T and the inclined surface 4c, flows out of the discharge port 4b, and falls on the first filter 24 (step 2) (see FIG. 6). ). Thus, since the sludge S automatically flows out of the first sludge separation tank 4, the operation of removing the sludge S from the first sludge separation tank 4 is easy.
[0044]
Further, the turbid liquid T that has flowed to the bottom surface portion 4a of the first sludge separation tank 4 flows into the first separation cylinder 5 because the first separation cylinder 5 is cylindrical, so that the first sludge separation is performed. It rises to the same height as the water level of the turbid liquid T between the tank 4 and the first separation cylinder 5. The flow velocity [L / min] at which the turbid liquid T rises in the first separation cylinder 5 is substantially equal to the flow velocity [L / min] of the turbid liquid T discharged from the first overflow pipe 22, and the first separation cylinder. Slower than the flow rate of the cyclone outside the body 5. For this reason, the sludge S is purified so that most of the sludge S sinks due to its own weight in the lower layer portion 5e in the first separation cylinder 5, and the turbid liquid T in the first separation cylinder 5 goes to the upper layer portion 5f. Thus, the turbid liquid T becomes purified water and is drained from the drain port 8a to the outside of the sludge separation tank 2 (step 3) (see FIG. 6). In some cases, the second sludge separation mechanism 3 is not required if the purification operation by the first sludge separation mechanism 2 is sufficient.
[0045]
The purified water in the first separation cylinder 5 is discharged from the drain port 8a. First drain pipe 8 is sent to the second turbid liquid recovery tank 23. The content of sludge S in the turbid liquid T when supplied to the second turbid liquid recovery tank 23 from the drain port 8a is purified to about 4.0 ppm.
That is, the first sludge separation tank 4 and the first separation cylinder 5 purify the turbid liquid T having a sludge S content of about 1117.5 ppm supplied from the first supply pipe 7 into purified water of about 4.00 ppm. It has a function that can be.
[0046]
Further, when the water level of the turbid liquid T in the first sludge separation tank 4 exceeds the water level in the first overflow pipe 22, the purified water in the upper layer of the first sludge separation tank 4 becomes clear in the first overflow pipe 22. It flows in and is sent to the second turbid liquid recovery tank 23. In addition, the purified water that has passed through the first filter 24 and filtered the sludge S flows into the second turbid liquid recovery tank 23 here, but may be sent to the adjustment tank (not shown). good.
[0047]
The purified water flowing into the second turbid liquid recovery tank 23 is supplied between the outer wall 10b of the second separation cylinder 10 and the inner wall 9d of the second sludge separation tank 9 by the second supply pipe 12 (step 1). (See FIG. 6).
[0048]
The purified water is discharged from the supply port 12 a of the second supply pipe 12 and circulates in a vortex so as to draw a cyclone along the inner wall 9 d of the second sludge separation tank 9. Then, the sludge S in the purified water descends while rotating near the inner wall 9d due to its own weight and sinks to the inclined surface 9c of the bottom surface portion 9a, and the discharge port 9b depends on the flow of the own weight, the purified water and the angle of the inclined surface 9c. Sinks to the side (step 2) (see FIG. 6).
[0049]
The sludge S flows out of the second sludge separation tank 9 from the discharge port 9 b and falls on the second filter 25. The minute sludge S in the purified water in the second sludge separation tank 9 is removed again by the second filter 25 in the same manner as the first sludge separation mechanism 2. Since the sludge S automatically flows out of the second sludge separation tank 9 in this way, The The operation of removing the sludge S from the ludge separation tank 9 is easy.
[0050]
The purified water in the upper layer portion 10f in the second separation cylinder 10 is in a state where the concentration of the sludge S is reduced by the sludge S sinking. The clear purified water in the second separation cylinder 10 flows into the second drainage pipe 13 from the drainage port 13a and is drained outside the second sludge separation tank 9 (step 3) (see FIG. 6). The purified water is sent to the valve 28 through the turbidimeter 27 from the drain port 13a.
[0051]
Further, when the level of purified water in the second sludge separation tank 9 exceeds the level of the second overflow pipe 26, the purified water in the upper layer of the second sludge separation tank 9 flows into the second overflow pipe 26. Then, it is sent to the water storage tank 31. Further, the purified water filtered through the second filter 25 also flows into the water storage tank 31. The second filter 25 is finer than the first filter 24 so that the minute sludge S that cannot be removed by the first filter 24 can be removed.
[0052]
The turbidimeter 27 measures the content of sludge S made of metal powder or the like in the wash water W, and if the content of sludge S is less than the set value, the pump motor inverter control device 32 calculates the current of the pump 21. If the rotational speed is increased to increase the flow velocity of the turbid liquid T (purified water) and the content of the sludge S is greater than the set value, the pump motor inverter control device 32 controls the current of the pump 21 to rotate the rotational speed. In addition, the flow velocity of the turbid liquid T (purified water) is decreased to facilitate the sinking of the sludge S so that the turbidity decreases.
[0053]
The purified water that has passed through the second drain pipe 13 flows through the valve 28 to the PH adjustment tank (not shown) and the water storage tank 31 for collecting the purified water and reusing it as cleaning water W. To the recovery pipe 30 through the delivery pipe 29.
The purified water that has flowed from the delivery pipe 29 to the adjustment tank (not shown) is purified by separating the sludge S by the above-described purification action, and is discarded, for example, as water neutralized by alkali treatment.
Further, since the purified water that has flowed into the water storage tank 31 is clear due to the above-described purification action, it is sent to the water storage tank 31 and, if necessary, sent to the cleaning water tank 17 by a pump (not shown). Reused as W.
[0054]
[ Embodiment ]
Next, the present invention Embodiment A sludge separation apparatus according to the present invention will be described.
FIG. 4 illustrates the present invention. Embodiment It is a top view of the sludge separation device (sludge separation mechanism) concerning. FIG. 5 illustrates the present invention. Embodiment It is a longitudinal cross-sectional view of the sludge separation apparatus (sludge separation mechanism) which concerns on this.
[0055]
In addition, this Implementation In the sludge separation mechanism according to the aspect, the same members as those in the configuration of the sludge separation mechanism 2 already described are denoted by the same reference numerals, and description thereof is omitted.
Implementation The state is Reference embodiment A plurality of separation plates 33 are installed in the lower layer portion in the first separation cylinder 5 (see FIG. 3) and a weir 34 is installed around the opening 22a (see FIG. 3) of the first overflow pipe 22. is there.
[0056]
As shown in FIG. 5, the first separation cylinder 35 has a plurality of separation plates 33 that are slightly inclined downward from the inner wall 35b in the vicinity of the opening 35a on the lower side of the first separation cylinder 35. It protrudes to. As a result, the turbid liquid T flows in a zigzag passage in the first separation cylinder 35 toward the upper layer portion 35c. At this time, since the sludge S collides with the separation plate 33 and sinks so as to slide down the separation plate 33 due to its own weight, the sludge S cannot rise to the upper layer portion 35c above the separation plate 33 of the first separation cylinder 35. .
[0057]
As shown in FIGS. 4 and 5, a weir 34 made of a triangular weir or a square weir is installed around the opening 22 a of the first overflow pipe 22. Thereby, the sludge S in the turbid liquid T immediately after flowing into the first sludge separation tank 4 from the first supply pipe 7 flows over the weir 34 and flows into the first overflow pipe 22. Can be difficult.
[0058]
Note that the present invention provides a sludge separation device, a sludge recovery device, and a sludge separation method according to the present invention described above. Reference embodiment as well as Embodiment The present invention is not limited to the above, and various modifications and changes can be made within the scope of the technical idea, and the present invention naturally extends to these modifications and changes.
The polishing machine 15 is not limited to a machine tool that performs polishing. For example, the polishing machine 15 is a grinding machine or a cutting machine that generates metal powder such as chips and chips that become sludge S from the workpiece 16. There may be.
Further, the sludge S is not limited to metal powder such as chips and chips produced by processing the workpiece 16, and may be stone, earth, dust, dust, resin, or the like.
The cleaning water W is not limited to cleaning water for machine tools such as the polishing machine 15, but may be industrial water or drinking water, and may be other liquids as long as the liquid contains sludge S. Good.
[0059]
【The invention's effect】
As described above, according to the sludge separation apparatus of the first aspect of the present invention, when a turbid liquid is supplied between the inner wall of the sludge separation tank and the separation cylinder, the turbid liquid is separated. While rotating along the outer peripheral surface of the cylinder, a flow is formed toward the discharge port side and the drain port side located near the upper end of the separation cylinder. Therefore, the sludge sinks to the inclined surface of the bottom surface portion due to its own weight when circulating along the separation cylinder of the sludge separation tank. The sludge can move to the discharge port along the inclined surface and be discharged from the discharge port.
The turbid liquid that enters the inner wall side of the separation cylinder from the lower end side of the separation cylinder further sinks sludge due to its own weight while ascending in the standing separation cylinder. Therefore, the sludge is prevented from rising to the upper layer part of the separation cylinder, and the turbid liquid floating on the upper layer part of the separation cylinder becomes purified water from which the sludge is separated, and can be taken from the drain port.
[0060]
In the sludge separation device according to claim 2 of the present invention, since the filter is installed facing the drain port, the sludge in the turbid liquid that has passed through the sludge separation device can be removed by the filter. The sludge can be prevented from flowing downstream, and the turbid liquid can be filtered.
[0061]
According to the sludge separation apparatus of the third aspect of the present invention, since the overflow pipe is provided, the turbid liquid overflowing from the sludge separation tank can be circulated so as to be filtered again, and the turbidity containing a large amount of sludge. The liquid can be prevented from flowing out.
[0062]
According to the sludge separation device of the fourth aspect, the sludge separation device purifies the turbid liquid in which the sludge and water are mixed by the plurality of sludge separation mechanisms. When purifying, when the turbid liquid is supplied through the supply pipe between the inner wall of the sludge separation tank and the outer wall of the separation cylinder in the sludge separation mechanism, the turbid liquid is applied to the outer wall of the separation cylinder. When it circulates along, it sinks to the inclined surface of the bottom part of the sludge separation layer by its own weight and is discharged from the discharge port.
In addition, the sludge separation device becomes purified water in a state in which sludge sinks in the flow of the turbid liquid from the lower end side to the upper end side of the separation cylinder, and is sent from the discharge port to the next sludge separation mechanism through the drain pipe. In the same manner, the turbid liquid or purified water is further purified.
[0063]
According to the sludge recovery apparatus of claim 5, the sludge contained in the workpiece used as the lubricating liquid or cleaning water is recovered in the turbid liquid recovery tank and separated by the sludge separator, and the cleaning water Can be purified. For this reason, the wash water can be recovered and reused many times, which contributes to cost reduction and prevention of contamination.
[0064]
According to the sludge separation method of claim 6, the turbid liquid is circulated along the outer wall of the separation cylinder and the inner wall of the sludge separation tank, and is sunk by the sludge's own weight to the discharge port side along the inclined surface. By separating the sludge in the liquid and smoothly collecting the sludge sinking to the inclined surface to the outlet, it is possible to easily remove and collect the sludge in the turbid liquid and to purify the water. it can.
Moreover, the purified water can be drained out of the sludge separation tank in a state where the concentration of sludge is reduced by the drain pipe having the drain port near the upper end of the separation cylinder.
[Brief description of the drawings]
FIG. 1 of the present invention Reference implementation type It is a schematic diagram of the sludge collection | recovery apparatus which concerns on a state.
FIG. 2 of the present invention Reference implementation type It is a top view of the sludge separation mechanism which concerns on a state.
FIG. 3 of the present invention Reference implementation type It is a longitudinal cross-sectional view of the sludge separation mechanism which concerns on a state.
FIG. 4 of the present invention Implementation It is a top view of the sludge separation mechanism which concerns on a state.
FIG. 5 shows the present invention. Implementation It is a longitudinal cross-sectional view of the sludge separation mechanism which concerns on a state.
FIG. 6 is a flowchart showing a sludge separation method according to the present invention.
[Explanation of symbols]
1 Sludge collection device
2 First sludge separation mechanism
3 Second sludge separation mechanism
4 First sludge separation tank (sludge separation tank)
4a, 9a Bottom part
4b, 9b outlet
4c, 9c inclined surface
4d, 9d inner wall
5 First separation cylinder (separation cylinder)
5a, 10a opening
5b, 10b outer wall
6,11 Holding part
7 First supply pipe (supply pipe)
8 First drain pipe (drain pipe)
8a, 13a Drain port
9 Second sludge separation tank (sludge separation tank)
10 Second separation cylinder (separation cylinder)
12 Second supply pipe (supply pipe)
13 Second drain pipe (drain pipe)
20 First turbid liquid recovery tank (turbid liquid recovery tank)
22 First overflow pipe (overflow pipe)
23 Second turbid liquid recovery tank
24 First filter (filter)
25 Second filter (filter)
26 Second overflow pipe (overflow pipe)
16 Workpiece
L1 predetermined interval
S sludge
T turbid liquid
W Wash water

Claims (6)

A sludge separation device for separating the sludge from a turbid liquid mixed with sludge and water and purifying the turbid liquid,
A sludge separation tank having a discharge port on the bottom surface and an inclined surface inclined from the periphery of the discharge port toward the discharge port;
The sludge separation tank has an opening above the bottom surface, and a plurality of separation plates that are inclined downward from the inner wall of the opening are alternately projected to the inner wall of the sludge separation tank. A separation cylinder that is erected via a holding portion so as to open a predetermined interval;
A supply pipe for supplying the turbid liquid to an upper layer portion between an inner wall of the sludge separation tank and an outer wall of the separation cylinder, the tip being provided toward the right side or the left side ;
A drain pipe provided with a drain outlet for draining outside the sludge separation tank in the vicinity of the upper end in the separation cylinder,
A sludge separation device comprising: The sludge separation device according to claim 1, wherein a filter for removing sludge is provided so as to face a drain outlet of the drain pipe .   The sludge separation apparatus according to claim 1 or 2, wherein the sludge separation tank is provided with an overflow pipe having an opening above the installation position of the drain outlet of the drain pipe. A sludge separation device comprising a plurality of sludge separation mechanisms for separating the sludge from a turbid liquid mixed with sludge and water and purifying the turbid liquid,
The sludge separation mechanism has a discharge port on the bottom surface and a sludge separation tank having an inclined surface inclined from the periphery of the discharge port toward the discharge port,
The sludge separation tank has an opening above the bottom surface, and a plurality of separation plates that are inclined downward from the inner wall of the opening are alternately projected to the inner wall of the sludge separation tank. A separation cylinder that is erected via a holding portion so as to open a predetermined interval;
A supply pipe for supplying the turbid liquid to an upper layer portion between an inner wall of the sludge separation tank and an outer wall of the separation cylinder, the tip being provided toward the right side or the left side ;
In the vicinity of the upper end in the separation cylinder, there is a drain outlet, and a drain pipe installed to distribute water to the next sludge separation tank,
A sludge separation device comprising: A turbid liquid recovery tank for recovering a turbid liquid containing cleaning water supplied to the workpiece and sludge from the workpiece;
The supply pipe for sending the turbid liquid sent from the turbid liquid recovery tank to the sludge separation device according to any one of claims 1 to 4,
The sludge separator according to any one of claims 1 to 4, wherein the turbid liquid supplied by the supply pipe is separated into water and sludge.
A sludge collecting apparatus comprising: Sludge and water are provided for a sludge separation tank having a bottom surface provided with a discharge port and an inclined surface inclined toward the discharge port and a separation cylinder standing by a holding unit at a position facing the discharge port. Supplying the turbid liquid mixed with the upper layer between the outer wall of the separation cylinder and the inner wall of the sludge separation tank;
Circulating the supplied turbid liquid along the outer wall of the separation cylinder and the inner wall of the sludge separation tank, and sinking the sludge to the discharge port side along the inclined surface by its own weight;
The sludge that flows into the separation cylinder and rises collides with a plurality of separation plates that are alternately inclined and projecting downward from the inner wall of the separation cylinder, and moves toward the discharge port by the weight of the sludge. A sinking step,
Draining purified water in a state where the concentration of sludge is reduced by a drain pipe having a drain outlet in the vicinity of the upper end of the separation cylinder in the separation cylinder outside the sludge separation tank;
Including a sludge separation method.

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