JPH09825A - Liquid treatment apparatus - Google Patents

Abstract

PURPOSE: To efficiently recover impurities without applying load to a filter member or a rotary drum and to extend the life of a filter by passing a liquid containing impurities though a filter means to separate the same into a solid and a filtrate and recovering the solid by a solid recovery means having a liquid recovery means and an air blow means. CONSTITUTION: A rotary drum 1 having a filter 1a made of a metal fitted thereto under tension is supported by a shaft so as to be partially immersed in a tank 7 holding a liquid such as a cutting liquid containing an unnecessary solid 6. Whereupon, the liquid is filtered by the filter 1a of the rotary drum to be recovered in a purifying tank 8 to be reutilized. The solid 6 is stagnated outside the drum 1 to be discharged to the outside of the tank 7 by a net conveyor but also bonded to the surface of the filter 1a to be moved upwardly from the surface of the liquid and blown off by the air from the air jet nozzles 2a, 2b of an air blow means to be recovered in a solid recovery box 3 and recovered in a recovery tank 9 from a pipe 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid processing apparatus for removing solid matter from a liquid containing the solid matter.

[0002]

2. Description of the Related Art As a liquid processing apparatus for removing solid matter from a liquid containing solid matter, it is generally provided with a filter member.
A filter is used which separates a liquid from a solid by filtering with this filter member.

For example, as an example of a liquid processing apparatus for removing chips from a used cutting fluid containing chips such as metal pieces discharged when performing a metal cutting operation, a substantially circle having a filter member stretched around a peripheral surface thereof is used. Some use a columnar rotating drum.

This is done by pouring used cutting fluid into a rotary drum supported by a rotary drum holding tank and separating chips contained in the used cutting fluid with a filter member on the peripheral surface of the rotary drum. The liquid and the chips are separated to recover only the cutting liquid.

In this case, in order to carry out continuous filtration, the rotary drum is rotated at a predetermined speed to sequentially move the filter portion, which is free from chips, into the liquid, and the inside of the rotary drum is moved. Collected chips are carried out of the rotating drum.

As another structure, instead of throwing the used cutting fluid into the rotary drum as described above,
There is also a configuration in which used cutting fluid is put into a rotary drum holding tank that axially supports the rotary drum (that is, outside the rotary drum), and the cutting fluid leaked to the inside of the rotary drum through a filter member is taken out. is there.

In this case as well, in order to carry out continuous filtration, the rotary drum is rotated at a predetermined speed to sequentially move the filter portion on which chips are not attached into the liquid. Since a part of the substance adheres to the outer surface of the filter member and circulates above the liquid surface as the drum rotates, a nozzle is provided to eject the fluid from the inner side of the rotating drum to drop the adhered solid substance. . As the fluid, a gas such as air or a liquid of the same kind as the processing liquid is generally used.

Since this nozzle injects fluid from the inner side of the rotary drum toward the outer side of the filter member, solid matter on the outer surface of the filter member is blown off by the ejected fluid, so It will be removed and fall again into the outer liquid.

FIG. 2 is a sectional view showing a schematic structure of a liquid processing apparatus having such a structure. In FIG. 2, cutting fluid containing unnecessary solid matter 26 is introduced into the tank 27 into the liquid introduction pipe 24.
In addition, the rotary drum 21 having a substantially cylindrical shape with the filter 21a stretched around the circumferential surface is pivotally supported so that a part of the rotary drum 21 is immersed in the cutting fluid containing the unnecessary solid matter 26.

In the filter portion in contact with the cutting fluid, the cutting fluid moves from the outside to the inside of the rotary drum 21, and the leaked fluid is taken out from the inside of the rotary drum 21 and collected in the septic tank 28 to be used again as the cutting fluid.

At this time, the solid matter 26 contained in the cutting fluid
Is blocked by the filter 21a from moving into the rotary drum 21, and is pressed against the filter surface toward the inside of the rotary drum 21 by the filter pressurization of the cutting fluid applied to the filter 21a. Some of the chips and the like are entangled with the filter outer surface of the rotary drum 21.

The rotating drum 21 is rotating at a predetermined speed, and therefore one side of the filter drum is successively introduced into the liquid while the other side of the filter drum 1a is partially entangled with the solid matter. Rotating drum 2 with some solids
With the rotation of No. 1, it will be orbited upward from the liquid surface.

An injection nozzle 25 is provided inside the rotary drum 21.
The injection nozzle 25 injects the fluid toward the solid matter 26 on the surface of the filter 21a that has moved above the liquid surface of the cutting fluid in a direction of separating the solid matter 26, The solid matter 26 on the surface of 21 a is blown away by the injection pressure from the inside of the rotary drum 21 and returned to the tank 27.

[0014]

However, as in the former case, the used cutting fluid is introduced into the rotary drum, and the chips contained in the used cutting fluid are separated by the filter member on the peripheral surface of the rotary drum. In this case, since the weight of the cutting fluid introduced into the rotary drum is directly applied to the filter member, the filter member is likely to be painful and the shaft supporting the rotary drum is also heavily burdened.

Further, the solid matter in the cutting fluid, especially the chips which are filtered off by the filter member and are applied to the filter on the drum peripheral surface, damage the filter member and shorten the life of the filter member. There is a problem that it ends up.

Further, like the latter, the used cutting fluid is poured into the rotary drum holding tank that axially supports the rotary drum (that is, outside the rotary drum) and flows into the rotary drum through the filter member. In the case of the structure that takes out the cutting fluid, the chips that have adhered to the filter member are blown off by the fluid ejection nozzle, so the blown chips are mixed again in the used cutting fluid in the rotary drum holding tank. Therefore, there is a problem that the filter efficiency is reduced.

Further, some of the chips produced by cutting metal or the like are linear, and such linear chips are entangled in the filter member and are difficult to remove. It is necessary to increase the pressure and flow rate of the fluid used to blow off and remove the waste.When liquid is used as this fluid, the flow rate mixed with the used cutting fluid in the rotary drum holding tank cannot be ignored, and the filter efficiency Has the drawback that

In addition, when the chips removed from the filter member have a small specific gravity, the chips blown off by the jet nozzle and separated from the filter member do not settle in the cutting fluid but float in the cutting fluid. Because,
These are again attached to the filter member, and there is a drawback that the filtration efficiency of the filter member is significantly reduced.

Therefore, the present invention solves the above-mentioned difficulties such as the burden on the filter member and the member such as the rotating drum for holding the filter member, and provides a liquid processing apparatus which can extend the life of the filter. To aim.

It is another object of the present invention to provide a liquid processing apparatus which can maintain high filter efficiency without returning unnecessary solid substances separated from the processing liquid by the filter member to the processing liquid again.

Particularly, it is possible to satisfactorily remove even a substance having a relatively small specific gravity and floating in the upper layer portion of the cutting fluid, or a chip having a shape such as a linear substance which is easily entangled with the filter member. An object of the present invention is to obtain a liquid processing device that can be used.

[0022]

In order to achieve the above object, in the liquid treatment apparatus according to the invention of claim 1, in order to remove the unnecessary solid matter from the liquid containing the unnecessary solid matter, the unnecessary solid matter is contained. Filter means for filtering liquid, liquid recovery means for recovering liquid that has passed through the filter means, air blow means for blowing compressed air to the filter means, and solid matter blown off from the surface of the filter means And a solid matter recovery means for recovering in the air.

Further, in the liquid treatment apparatus according to the invention of claim 2, in the invention of claim 1, the air blow means comprises a nozzle portion for blowing compressed air over the entire width of the filter means. There is.

Further, in the liquid processing apparatus according to the invention of claim 3, in the invention of claim 1 or 2, the air blow means comprises a first nozzle portion and a second nozzle portion, and the first nozzle The part is provided on the side where the liquid after being filtered by the filter means is present, ejects compressed air to the filter means, and the second nozzle part is unnecessary before being filtered by the filter means. It is provided on the side where the liquid containing the solid matter is present, and is for blowing off the solid matter floated on the surface of the filter means by the first nozzle portion.

Further, in the liquid treatment apparatus according to the invention of claim 4, in the invention according to claim 3, a rotary drum having the filter means on its peripheral surface is provided, and the rotary drum is provided with the filter means. This is a type in which a filtered liquid is taken inside. Further, in this case, the first nozzle portion ejects compressed air from the inside of the rotary drum with respect to the filter means, and the second nozzle portion intersects the ejection direction of the first nozzle portion to filter the air. Compressed air is ejected in a direction along the outer surface of the means.

Further, the liquid treatment apparatus according to the invention of claim 5 is the invention according to any one of claims 1 to 4, further comprising liquid blowing means for blowing high-pressure liquid to the filter means after the treatment by the air blowing means. Further equipped.

[0027]

In the invention of claim 1, the liquid containing the unnecessary solid matter is filtered into the solid matter and the filtrate by passing through the filter means, and the liquid filtered by the filter means is the liquid recovery means. While the solids are collected by
It is properly carried out to the outside.

At this time, compressed air is blown to the filter means by the air blow means, and the solid matter blown off from the surface of the filter means by this is recovered in the air by the solid matter recovery means. In this way, the liquid filtered from the solids by the filter means is recovered for reuse from the liquid containing the unwanted solids.

During filtration, part of the filtered solid matter adheres to the filter means, and the adhered solid matter is blown off from the surface of the filter means by blowing compressed air from the air blowing means. The air blow means continuously removes the adhered solid matter on the surface of the filter means, so that the need for frequent cleaning of the filter means every time the liquid is filtered to maintain the filtering ability is significantly reduced, which is high. Maintenance-free property can be realized.

The solid matter blown off from the surface of the filter means by the air blowing means is captured and collected by the solid matter collecting means in the air before falling into the liquid to be treated, so that the solid matter of the liquid to be treated before filtration is solidified. The substance concentration does not increase again. That is, since the foreign matter content of the untreated liquid does not rise again, problems such as reduction in filtration efficiency of the filter means and clogging of the filter means do not occur, and unnecessary solid matter in the liquid is efficiently filtered. be able to.

The solid matter collecting means for collecting the solid matter blown off by the air blow in the air is not particularly limited, but in order to reliably collect the solid matter blown off by the air blow means, It is preferable that a recovery box provided with an impact wall that receives the jetted air is disposed at a position downstream of the air blow means in the jetting direction and close to and opposite to the filter.

In this case, the solid matter blown off by the air blowing means hits the collision wall before the jet air diffuses and falls, and enters the waiting collection box below the solid wall, so that the solid matter goes outside the box. It is possible to recover almost the entire amount without scattering. Furthermore, by connecting this recovery box to the recovery tank through the outlet pipe, solids can be discharged from the recovery box to an external recovery tank without touching anything, so continuous solid recovery of scattered solids is possible. Is possible.

In the liquid treatment apparatus according to the present invention, the air blow means for injecting the compressed air to the filter means may include a nozzle portion for injecting the compressed air to the entire width of the filter means.

As the nozzle portion for blowing the compressed air over the entire width of the filter means, for example, a structure in which one or a plurality of nozzles are reciprocally moved in the width direction of the filter means, or a filter is used. A plurality of nozzles are fixedly arranged in the width direction of the means so that the ejection width from the nozzles covers the entire width of the filter means as a whole, or a slit nozzle having substantially the same size as the width of the filter means is fixedly arranged. Examples thereof include those having a configuration, but in any case, it is sufficient if the compressed air is blown to the entire width of the filter means.

Further, as air blow means suitable for the liquid treatment apparatus of the present invention, a first nozzle portion provided on the liquid side after filtration by the filter means and a first nozzle portion provided on the liquid side before filtration by the filter means. It is also possible to provide two nozzle parts.

That is, the solid matter mixed in the liquid is either liable to be entangled with the filter means or liable to be entangled with the filter means depending on its shape and specific gravity. Is to inject compressed air from the direction opposite to the flow passing through the filter means to the solid matter by the first nozzle portion, thereby blowing away the solid matter that is difficult to be entangled in the filter means, and the entanglement force of the solid matter that is easily entangled in the filter means. Can be weakened to float on the surface of the filter means.

Then, when compressed air is simultaneously ejected on the surface side of the filter means by the first nozzle portion, the compressed air from the second nozzle portion floats from the surface of the filter means by the compressed air from the first nozzle portion. The solid material that has been marked will be torn off and blown away. It goes without saying that the solid matter blown off by the compressed air from the first and second nozzle portions is collected by the solid matter collecting means.

As described above, the first nozzle portion and the second nozzle portion are provided on both surfaces of the filter means, and the compressed air is ejected from different directions toward the filter means, so that the solid matter attached to the filter means, Therefore, it is possible to reliably remove the solid matter that is easily entangled in the filter means.

Further, in this case, preferably, the filter means is arranged as a peripheral surface of the rotary drum, and the first nozzle portion is
Compressed air is ejected to the filter means from the inside of the rotary drum, and the second nozzle portion ejects compressed air in a direction intersecting the ejection direction of the first nozzle portion and along the outer surface of the filter means. It is good to configure it.

That is, when a part of the side surface of the rotary drum is submerged in the liquid containing unnecessary solid matter and the drum is rotated, the liquid filtered by the filter means from the outside of the rotary drum flows into the rotary drum and accumulates therein. Come on. At this time, the liquid filtered out inside the rotary drum is recovered for reuse, while unnecessary solid matter contained in the liquid is prevented from entering the rotary drum by the filter means, and the filter means is removed. Solid matter will adhere to the outer surface of the.

If solid matter remains adhered to the outer surface of the filter means, the filtering ability will be reduced, so that the outer surface of the filter means before the part of the filter means enters the liquid again as the rotary drum rotates. It is necessary to remove the solid matter attached to the.

Therefore, in the liquid filtering step, the filter portion having the solid matter adhered to the surface thereof is positioned above the liquid surface by the rotation of the rotary drum, and is filtered by the first nozzle provided inside the rotary drum. The compressed air is ejected from the inside of the rotating drum to the means, thereby blowing away the mere adhering solid matter not entangled in the filter means and capturing and recovering it in the air by the solid matter recovering means, and the solid matter entangled in the filter means. Is entangled with the jet air flow to weaken the force and make it float on the surface of the filter means.

In addition, the second nozzle portion ejects compressed air along the surface of the filter means from a direction intersecting with the ejection direction of the first nozzle portion, and the jet air of the first nozzle portion already ejects the compressed air. By injecting compressed air from the second nozzle part from the side to the solid matter that is floating on the surface, the solid matter is peeled off from the surface of the filter means as a result, and similarly the recovery means. To collect and collect in the air.

The position and the position of the second nozzle may be any position as long as the compressed air is jetted along the outer peripheral surface of the rotary drum in a direction intersecting the jetting direction of the first nozzle portion. It is preferable that the compressed air from the first nozzle portion is provided so as to be directed obliquely downward on the tangent line of the peripheral surface of the rotary drum that crosses the position where the compressed air passes through the filter means.

Thus, the solid matter blown off by the first nozzle and the second nozzle can be effectively removed by the relatively compact recovery box. Further, if the capturing range of the solid material collecting means is expanded to the side of the rotary drum, the solid material can be efficiently collected even if the solid material is scattered around.

The liquid processing apparatus according to any one of the aspects of the present invention may further include liquid blowing means for blowing the high-pressure liquid to the filter means after the processing by the air blowing means.

In this case, most of the unnecessary solid matter adhering to the surface of the filter means can be blown off by the air blowing means, but the high pressure liquid is applied to the filter surface from the back side following the air blowing means as the drum rotates. By further disposing the liquid blowing means for spraying, the removal rate of the adhered solids is further enhanced, so that the filtering ability of the filter means is enhanced and the maintenance life of the filter can be extended.

The high-pressure liquid from the liquid blowing means in this case is preferably the same kind of liquid to be treated, so that the solid matter removed from the filter surface is not a problem even if mixed into the liquid to be treated. No, but of course, the high pressure liquid may be received through an additional fixed filter which filters it further.

[0049]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic explanatory view of a liquid processing apparatus which is an example of the constitution of the present invention. In FIG. 1 (a), a substantially cylindrical rotary drum 1 on which a metal, resin or fiber mesh filter 1 a is stretched over the entire circumferential surface is a cutting liquid containing unnecessary solid matter 6. Is rotatably supported so that a part of it is immersed in the cutting fluid.

The rotary drum 1 is rotating at a predetermined speed around the rotary shaft 11, but in the filter portion of the rotary drum 1 which comes into contact with the cutting liquid, the cutting liquid outside the rotary drum 1 is rotated by the cutting liquid. It moves to the inside of and is filtered.

That is, the cutting fluid containing unnecessary solid matter 6 such as chips is introduced into the tank 7 by the liquid introduction pipe 4, filtered by the filter 1a, and recovered from the inside of the rotary drum 1 to the purification tank 8. , Is configured to be used as a cutting fluid again.

On the other hand, the solid matter 6 contained in the cutting fluid introduced into the tank 7 is filtered by the filter 1a and stays outside the rotary drum 1, and is discharged outside the tank 7 by a net conveyor (not shown) or the like. Although discharged, the solid matter is pressed against the surface of the filter 1a in the direction toward the inside of the rotary drum 1 by the filtration pressure, so that the rotary drum circulates while the solid matter is attached to the outer surface of the filter 1a.

Solid matter 6 deposited on the outer surface of the filter 1a
Moves above the level of the cutting fluid as the rotary drum 1 rotates.
As the air blowing means for removing the solid matter 6 attached to the surface of the, a movable air blowing mechanism provided with two air injection nozzles 2a and 2b is provided.

FIG. 1B is a schematic explanatory view showing a movable air blow mechanism. In FIG. 1B, the movable air blow mechanism includes two injection nozzles 2a and 2b and an air compressor 10, and compressed air from the air compressor 10 has two injection nozzles 2a and 2b.
And is sprayed on the front and back surfaces of the filter 1a.

The nozzle portions of the two injection nozzles 2a and 2b can be adjusted in terms of head oscillation, and further, can be reciprocally moved integrally by the drive device 12 in the axial direction of the rotary drum 1. The reciprocating movement by the driving device 12 is periodically performed at a predetermined speed.

Further, the jetting direction of the jetting nozzle 2b outside the rotary drum 1 intersects the jetting direction of the jetting nozzle 2a arranged inside the rotary drum 1 and is substantially tangential to the outer surface of the filter 1a. Has been defined. The air blow operation by the reciprocating nozzle of the movable air blow mechanism having such a configuration is continuously performed during the rotary filtration operation of the rotary drum 1.

The solid substances 6 such as chips adhering to the surface of the filter 1a include those which are simply attached without being entangled with the filter 1a and those which are entangled with the filter 1a. When the compressed air is jetted to the filter 1a, the solid matter simply attached to the filter 1a is immediately blown off, and the solid matter 6 entangled in the filter 1a is blown on the surface of the filter 1a by the fluid force of the jet stream. The entanglement with respect to the trailing filter 1a is weakened toward the downstream side of, and floats.

The solid matter 6 blown off by the jet nozzle 2a hits the impact wall 3a of the solid matter collection box 3 provided at the downstream position of the air flow and drops inside, and then the solid matter collection box 3
The liquid is discharged from the bottom of the liquid processing device to the outside through the solid material outlet pipe 13 communicating with the recovery tank 9.

For the solid matter 6 floating on the surface of the filter 1a, the jetting nozzle 2b provided outside the rotary drum 1 is directed toward the solid matter collecting box 3 in the jetting direction of the jetting nozzle 2a. Inject compressed air in the direction intersecting with.

The air stream jetted from the nozzle 2b passes through the outer surface of the filter 1a in a substantially tangential direction toward the solid matter recovery box 3. Therefore, the surface of the filter 1a and the solid 6
The compressed air from the injection nozzle 2b enters between the and, weakening the entanglement of the solid matter 6 with the filter 1a, and finally the solid matter 6 is blown off. The solid matter 6 blown off by the jet nozzle 2b also falls into the solid matter recovery box 3, passes through the solid matter discharge pipe 13, and is discharged to a recovery tank outside the liquid processing apparatus.

In the present embodiment, in order to capture and recover the blown solid matter in the air, a solid matter recovery box 3 having a collision wall 3a for receiving compressed air from each of the injection nozzles 2a and 2b is provided on the side surface of the rotary drum. Injecting nozzles 2a, 2 in close proximity
It is provided below b. As a result, the blown-out solid portion 6 can be recovered almost completely and efficiently.

Further, in this embodiment, a liquid jet nozzle 5 which is a liquid blowing means for blowing a high-pressure liquid from the inside of the drum above the liquid surface is further provided to the filter 1a which has been processed by the movable air blowing mechanism. There is.

As a result, for example, fine adhered solids that cannot be completely removed by the air blow mechanism can be removed by the fluid force of the high-pressure liquid for cleaning, so that continuous filtration is performed while maintaining a high filtering capacity of the filter means. The filtering operation can be performed, and the maintenance life of the filter can be extended.

[0064]

As described above, according to the liquid processing apparatus of the present invention, there is no difficulty that an excessive load is applied to the filter member and members such as the rotating drum that holds the filter member, and the filter member is always kept in a clean state. Can be maintained to extend filter life.

Further, not only is it possible to prevent unnecessary solid matter separated from the cutting fluid by the filter member from being supplied to the filter member again for filtration, but it is also possible to efficiently separate and collect the adhered solid matter. There is also.

In particular, even a solid substance having a relatively small specific gravity and floating in the upper layer portion of the cutting fluid, or a solid substance having a shape that easily entangles with the filter member, such as an indeterminate linear solid substance, It is possible to provide a liquid treatment device that can always remove with stable filter efficiency.

[Brief description of drawings]

1A and 1B are explanatory views showing an embodiment of the present invention, in which FIG. 1A is a schematic constitutional view, and FIG. 1B is a view taken along the line BB.

FIG. 2 is a schematic configuration diagram showing a conventional example.

[Explanation of symbols]

 1, 21 rotating drum 1a, 21a filter 2a, 2b injection nozzle 3 solids recovery box 3a impingement wall 4, 24 liquid introduction pipe 5, 25 liquid injection nozzle 6, 26 solids 7, 27 tank 8, 28 purification tank 9 recovery tank 10 Air Compressor 11, 31 Rotating Shaft 12 Driving Device 13 Solids Derivation Pipe

Claims (5)

[Claims] 1. A liquid processing apparatus for removing unnecessary solid matter from a liquid containing unnecessary solid matter, comprising: a filter means for filtering the liquid containing the unnecessary solid matter; and a liquid passing through the filter means. Liquid recovery means, an air blow means for blowing compressed air to the filter means, and a solid matter recovery means for recovering solid matter blown off from the surface of the filter means in the air. Liquid processing device. 2. The liquid processing apparatus according to claim 1, wherein the air blowing unit includes a nozzle unit that blows compressed air over the entire width of the filter unit. 3. The air blow means is provided on the side where the liquid after being filtered by the filter means is present, and a first nozzle part for ejecting compressed air to the filter means, and the air blow means is filtered by the filter means. Is provided on the side where there is a liquid containing unnecessary solid matter before it is provided, and a second nozzle section for blowing away the solid matter floated on the surface of the filter means by the first nozzle section, The liquid processing apparatus according to claim 1 or 2. 4. A rotary drum which has the filter means on its peripheral surface and takes in the liquid filtered through the filter means into the inside thereof, wherein the first nozzle portion is inside the rotary drum with respect to the filter means. 4. The compressed air is jetted from the nozzle, and the second nozzle portion jets the compressed air in a direction intersecting the jetting direction of the first nozzle portion and along the outer surface of the filter means. Liquid handling equipment. 5. The liquid processing apparatus according to claim 1, further comprising liquid blowing means for blowing a high-pressure liquid to the filter means after the treatment by the air blowing means.