JPH10151362A - Separator for sludge contained in water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively and rapidly separate even fine sludge with a simple construction and also to extremely reduce worn parts to make maintenance simple. SOLUTION: A separator for sludge contained in water is provided with a separation tank 4 into which liquid is fed, a nonmagnetic plate 5 arranged in the separation tank 4 and for moving sludge S on the surface thereof, and a magnetic conveyor 6 for attracting the sludge S onto the surface of the nonmagnetic plate 5 by magnetic attracting force to move it in the discharge direction. The nonmagnetic plate 5 is provided with an attracting part 5A for attracting sludge S contained in liquid, an inclined part 5B for transferring the attracted sludge S to outside liquid, and a falling part 5C for making the sludge S to fall from the head of the nonmagnetic plate 5. The sludge S is attracted on the upper surface of the attracting part 5A of the nonmagnetic plate 5 by the magnetic conveyor 6 and is transferred to the falling part 5C from the inclined part 5B and is separated from the nonmagnetic plate 5 at the head falling part 5C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating sludge contained in cutting oil.

[0002]

2. Description of the Related Art Large sludge contained in a liquid can be easily removed by filtration. However, it is very difficult to efficiently remove fine sludge. In order to remove fine sludge, an apparatus using magnetic attraction has been developed. The magnetic adsorption force can efficiently adsorb fine particles that are difficult to settle quickly in a liquid.

[0003] An apparatus that separates sludge by magnetic attraction force,
For example, Japanese Patent Application Laid-Open Nos. 56-87437 and 55
-84560. The device described in the former publication has a large number of magnets fixed to the back surface of a belt conveyor. In this separation device, a part of the belt conveyor is immersed in a liquid containing sludge, and the sludge contained in the liquid is adsorbed on the surface of the belt. The other end of the belt conveyor extends outside the liquid. Outside the liquid, the sludge adsorbed on the belt surface is removed by scraping with a scraper.

[0004] In the separation apparatus having this structure, the surface of the belt is scraped off with a scraper, and the belt and the scraper are significantly worn. If the scraper does not adhere to the surface of the belt without any gap, the sludge adsorbed on the belt cannot be reliably removed. If the scraper is strongly pressed against the belt in order to surely separate all the sludge, wear of the scraper and the belt becomes severe. Further, in the separation device having this structure, the sludge is attracted to the belt surface by the magnetic attraction force, so that it is difficult to easily separate the sludge with the scraper. This is because the sludge needs to be separated from the belt in a state where a force to be attracted to the belt acts. In particular, if the magnetic attraction force is increased in order to efficiently adsorb the sludge to the belt, it becomes difficult to separate the sludge from the belt. Therefore, if the sludge is efficiently adsorbed on the belt and separated from the liquid, it becomes difficult to separate the sludge from the belt.

Further, the separation device described in the latter publication adsorbs sludge S on the surface of a rotating cylinder 1 as shown in FIG. In order to adsorb the sludge S, a magnet cylinder 2 is disposed inside the cylinder 1. This device rotates the cylinder 1 and the magnet cylinder 2 in the same direction. The cylinder 1 is made of a non-magnetic metal such as stainless steel. Cylinder 1
Is immersed in the liquid, the sludge S is adsorbed on the surface of the cylinder 1 because the magnet cylinder 2 is disposed on the inner surface thereof.
The sludge S adsorbed on the cylinder 1 is removed by scraping with a scraper 3 that contacts the surface of the cylinder 1.

[0006]

The separation device shown in FIG. 1 adsorbs sludge S on the surface of the cylinder 1 and scrapes it off, so that the sludge S can be removed more smoothly than a device using a belt conveyor. Can be removed. However, the separation device having this structure also has a disadvantage that the cylinder 1 and the scraper 3 are worn because the scraper 3 is pressed against the surface of the cylinder 1 to scrape the sludge S. Furthermore, cylinder 1 and magnet cylinder 2
Because both are rotated, the whole structure becomes complicated,
It is difficult to reduce manufacturing costs. In particular, since the magnet cylinder 2 is rotated inside the rotating cylinder 1, the structure is complicated. Furthermore, since the cylinder 1 is rotated in the liquid, there is a disadvantage that it is difficult for the rotating cylinder 1 to agitate the liquid and to adsorb sludge to the cylinder 1 efficiently.

[0007] The present invention has been developed to solve these disadvantages. An important object of the present invention is
It is an object of the present invention to provide an apparatus for separating sludge contained in a liquid, which has an extremely simple structure, allows fine sludge to be separated efficiently and quickly, and furthermore, minimizes a wear portion and makes maintenance very easy.

[0008]

According to the present invention, there is provided an apparatus for separating sludge contained in a liquid according to the present invention. The separation device is provided with a separation tank 4 for supplying a liquid containing sludge S, and is disposed in the separation tank 4.
A non-magnetic plate 5 for moving the sludge S on the surface thereof, and a non-magnetic plate 5 disposed on the back of the non-magnetic plate 5 to adsorb the sludge S on the surface of the non-magnetic plate 5 with a magnetic attraction force and move the sludge S in the discharge direction. And a magnetic conveyor 6.

Further, in the separation device of the present invention, the non-magnetic plate 5 is constituted by the suction section 5A, the inclined section 5B, and the drop section 5C. The adsorbing section 5A adsorbs sludge S, which is below the liquid level of the separation tank 4 and is contained in the liquid, on the upper surface by the magnetic adsorption force of the magnetic conveyor 6 disposed below. Inclined part 5B
Moves the sludge S adsorbed by the adsorbing section 5A above the liquid level. The falling section 5C causes the sludge S pulled up from the liquid in the inclined section 5B to fall from the non-magnetic plate 5.

In the separation apparatus having this structure, the sludge S contained in the liquid in the separation tank 4 is adsorbed on the upper surface of the adsorption section 5A of the non-magnetic plate 5 by the magnetic conveyor 6. Magnetic conveyor 6
By moving the magnet, the sludge S adsorbed by the adsorbing section 5A is transferred in the moving direction of the magnetic conveyor 6. The moved sludge S is transferred from the inclined portion 5B to the falling portion 5C, where the non-magnetic plate 5
Fall from the tip of the is separated.

In the separation apparatus having this structure, the sludge S is not scraped off from the non-magnetic plate 5 by a scraper and separated. The sludge S adsorbed on the non-magnetic plate 5 is
It is pushed out by the sludge S which is transferred one after another, or
With the magnetic conveyor 6 moving on the lower surface, the magnetic material is transferred from the suction part 5A to the falling part 5C through the inclined part 5B. The sludge S transferred to the falling part 5C falls from the tip,
It is separated from the non-magnetic plate 5.

[0012]

According to the separating apparatus of the present invention, the sludge S separated from the non-magnetic plate 5 is extruded by the sludge S sent one after another, instead of being scraped off by a scraper as in the prior art, and the sludge S is immediately left without falling. Separate at 5C. For this reason,
The separation device of the present invention does not need to move the non-magnetic plate 5 and does not need to rub a scraper,
There is a feature that the sludge S adsorbed on the non-magnetic plate 5 can be separated without fail and smoothly.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a device for separating sludge contained in a liquid for embodying the technical idea of the present invention, and the present invention does not specify the separating device as follows.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as "claims", "actions", and "actions". In the column of "Means for solving the problem". However, the members shown in the claims are
It is by no means specific to the members of the embodiment.

The apparatus for separating sludge contained in liquid shown in FIG. 2 is used, for example, to separate metal sludge contained in cutting oil. The separation device includes a separation tank 4 to which a liquid as a cutting oil containing sludge S is supplied, a non-magnetic plate 5 for adsorbing and discharging sludge S contained in the liquid in the separation tank 4, 5 is provided with a magnetic conveyor 6 for magnetically attracting by magnetic force.

The separation tank 4 horizontally arranges a jet pipe 7 for liquid containing sludge S and a liquid collecting pipe 8 for discharging the liquid separated from the sludge S. The ejection pipe 7 is arranged close to the bottom of the separation tank 4. The ejection pipe 7 supplies a liquid containing sludge S to the separation tank 4 by connecting a plurality of pipes in parallel. The ejection pipe 7 has a supply hole 7A for supplying liquid, which is opened downward. The jet pipe 7 is connected to a storage tank 12 via a separation tank 9, a flow control valve 10, and a pump 11. The pump 11 sucks the liquid in the storage tank 12 and transfers the liquid to the separation tank 9. The liquid in the separation tank 9 flows down naturally and is supplied to the separation tank 4 from the ejection pipe 7.

The separation tank 9 is made of a punching metal 9A.
, The flow straightening plate 9B and the distribution plate 9C are fixed in parallel, and large sludge contained in the liquid supplied from the pump 11 is separated and supplied to the separation tank 4. The device that supplies the liquid to the separation tank 4 in a natural flow manner can adjust the relative height between the separation tank 9 and the separation tank 4 and smoothly supply the liquid to the separation tank 4. As the separation tank 9 is higher than the separation tank 4, the supply amount of the liquid can be increased. The supply amount of the liquid is set to an optimum value in consideration of the separation capacity of the separation device.

The liquid collecting pipe 8 is provided near the liquid surface. The liquid collecting pipe 8 shown in the figure has a V-groove 8A on the upper surface of the flat plate, through which the liquid separated from the sludge S flows. A plurality of V grooves 8A are provided at a constant interval. Sludge S
Is separated and flows into the V-groove 8A so as to overflow. The V groove 8A has its end connected to the discharge pipe 13 (not shown). The liquid flowing into the V groove 8A passes through the discharge pipe 13 and is discharged to a return tank 14 provided outside the separation tank 4. Return tank 1
The cutting oil supplied to 4 and separated and cleaned of the sludge S is again supplied to a grinder or the like and used repeatedly.

The separating apparatus shown in FIG. 1 uses a non-magnetic plate 5 as a bottom plate of the separating tank 4. However, it goes without saying that a non-magnetic plate 5 can be provided inside the separation tank 4 separately from the bottom plate of the separation tank 4. However, the device that uses the non-magnetic plate 5 as the bottom plate of the separation tank 4 can have the simplest structure.

The non-magnetic plate 5 is made of a non-magnetic metal such as stainless steel or aluminum, or a non-magnetic material such as plastic. The non-magnetic plate 5 has an adsorbing section 5A for adsorbing sludge S contained in the liquid supplied from the ejection pipe 7, an inclined section 5B for raising the sludge S of the adsorbing section 5A to the outside of the liquid, and an inclined section 5B. And a falling section 5C for separating the sludge S sent out of the liquid from the non-magnetic plate 5 from the non-magnetic plate 5. The upper surface of the non-magnetic plate 5 has a smooth surface so that the sludge S can be smoothly transferred.

The suction section 5A is constituted by a horizontal portion of the bottom plate of the separation tank 4. In the figure, the left portion of the bottom plate is an inclined surface that is inclined upward in the direction of transport of the sludge S, and this inclined surface constitutes an inclined portion 5B. The inclined portion 5B has an upper end extending above the liquid level. The inclined portion 5B
The upper end is connected to a falling portion 5C which is curved at a predetermined radius of curvature and descends vertically. The falling part 5C is provided at the tip of the non-magnetic plate 5, and a storage tank 15 for sludge S is provided below the falling part 5C.

The magnetic conveyor 6 is disposed below the non-magnetic plate 5. This is for adsorbing the sludge S with a magnetic attraction force and transferring the sludge S along the non-magnetic plate 5.
The magnetic conveyor 6 includes a permanent magnet 6A that moves close to the lower surface of the non-magnetic plate 5. The permanent magnet 6A has both ends connected to an endless chain 6B of the magnetic conveyor 6. The endless chain 6B connects the elongated permanent magnets 6A at regular intervals. Furthermore, the magnetic conveyor 6
In order to move the permanent magnet 6A closer to the lower surface of the non-magnetic plate 5, a chain guide 6F is provided on the transfer path of the chain 6B. Chain 6B to chain guide 6
By moving the permanent magnet 6A to the position determined by F, the permanent magnet 6A is moved closer to the lower surface of the non-magnetic plate 5. Chain 6
In order to move B, two chains 6B are hung on a sprocket 6C. The sprocket 6C is fixed to both ends of the rotating shaft 6D, and drives the rotating shaft 6D by the motor 6E to move the chain 6B.

The speed of the permanent magnet 6A moved by the chain 6B is set to, for example, about 1 cm / sec. However, the moving speed of the permanent magnet 6A can be, for example, 0.3 to 5 cm. If the moving speed of the permanent magnet 6A is too slow, the adsorbed sludge S cannot be efficiently discharged. Conversely, if the moving speed of the permanent magnet 6A is too fast, the adsorbed sludge S cannot be transferred. The moving speed of the permanent magnet 6A is determined so that the sludge S can move efficiently.

3 to 5 are a longitudinal sectional view, a plan view, and a transverse sectional view showing a separation device according to another embodiment. In the separation apparatus shown in these figures, five ejection pipes 7 are provided at the bottom of the separation tank 4. The five ejection pipes 7 are connected in parallel, and supply the liquid containing sludge downward. On the upper surface of the ejection pipe 7, groove-shaped collection pipes 8 are arranged in six rows. Liquid collection tube 8
Has a U-shaped cross section with an upper opening. Both ends of the liquid collecting tube 8 are closed, and the liquid in the separation tank 4 overflows and flows. Therefore, the collection pipe 8
Is disposed near the liquid surface of the separation tank 4. The liquid collection pipe 8 is connected to the discharge pipe 13 via the pipe 16, and discharges the liquid that overflows and flows in from the discharge pipe 13.

The apparatus shown in this figure has a liquid collecting pipe 8 and a jet pipe 7
Can be connected at a right angle and disposed at a fixed position of the separation tank 4. For this reason, the liquid collection pipe 8 and the separation tank 4 can be disposed at fixed positions with a simple structure. Also, the liquid can be efficiently collected by causing the liquid to overflow into the U-shaped liquid collecting tube 8.

Further, in the apparatus shown in FIG. 2, the liquid collecting pipe 8 provided with the V-groove 8A can be connected to the ejection pipe 7 as shown in FIG. The ejection pipe 7 in this figure is a plate-like collection pipe 8.
The ejection pipe 7 is connected to the lower surface of the A through a U-bolt 17. This structure also has a feature that the liquid collection tube 8 and the ejection tube 7 can be accurately arranged at a fixed position with a simple structure.

[0027]

The apparatus for separating sludge contained in a liquid according to the present invention has a feature that, despite having a very simple structure, even fine sludge can be efficiently and quickly separated. That is, the separation apparatus of the present invention causes the sludge to be adsorbed on the adsorption portion of the non-magnetic plate provided below the liquid surface of the separation tank, and transfers the sludge to the outside of the liquid at the inclined portion of the non-magnetic plate. This is because the material is transferred from the portion to the falling portion provided at the tip of the non-magnetic plate, and separated from the non-magnetic plate at the falling portion. The device of the present invention, which transports sludge along the non-magnetic plate and further drops and separates the sludge transferred from the dropping portion provided at the tip of the non-magnetic plate, adsorbs the sludge like a conventional device. There is no need to move the non-magnetic plate
There is no need to scrape sludge off the moving non-magnetic plate with a scraper. The sludge is pushed out to the falling part at the tip of the non-magnetic plate by the sludge transferred later. Sludge pressed at the tip of the non-magnetic plate falls from the tip of the non-magnetic plate and is separated. In this state, the sludge separated from the non-magnetic plate does not adhere to the surface and remains as it does when scraping with a scraper, and is reliably separated.

Further, since the separation device of the present invention does not require a member for scraping sludge like a scraper,
The scraper and the non-magnetic plate are not worn. This is synergistic with the fact that there is no need to move the non-magnetic plate, thereby greatly simplifying maintenance and minimizing failures. In addition, since the structure is simple, a feature that can be manufactured at low cost is realized.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a conventional apparatus for separating sludge contained in a liquid.

FIG. 2 is a longitudinal sectional view showing a separation device according to an embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a separation device according to another embodiment of the present invention.

FIG. 4 is a plan view of the separation device shown in FIG.

FIG. 5 is a cross-sectional view of the separation device shown in FIG.

FIG. 6 is a cross-sectional view showing another embodiment for connecting the ejection pipe and the liquid collection pipe.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cylinder 2 ... Magnet cylinder 3 ... Scraper 4 ... Separation tank 5 ... Non-magnetic plate 5A ... Adsorption part 5B
... Slope part 5C ... Drop part 6 ... Magnetic conveyor 6A ... Permanent magnet 6B
... Chain 6C ... Sprocket 6D ... Rotating shaft 6E ... Motor 6F ... Chain guide 7 ... Squirting tube 7A ... Supply hole 8 ... Liquid collection tube 8A ... V groove 9 ... Separation tank 9A ... Punching metal 9B
... Rectifier plate 9C ... Distribution plate 10 ... Flow control valve 11 ... Pump 12 ... Storage tank 13 ... Drain pipe 14 ... Return tank 15 ... Reservoir 16 ... Piping 17 ... U bolt S ... Sludge

Claims (1)

[Claims] 1. A separation tank (4) to which a liquid containing sludge (S) is supplied, and a sludge disposed in the separation tank (4).
A non-magnetic plate (5) for moving (S) on the surface, and a non-magnetic plate (5) disposed on the back of the non-magnetic plate (5)
A magnetic conveyor (6) for adsorbing the sludge (S) with a magnetic attraction force and moving the sludge (S) in the discharge direction, wherein the non-magnetic plate (5) is below the liquid level of the separation tank (4). The suction unit (5) for adsorbing the sludge (S) contained in the liquid on the upper surface by the magnetic adsorption force of the magnetic conveyor (6) disposed below
A), an inclined portion (5B) for moving the sludge (S) adsorbed by the adsorbing portion (5A) above the liquid surface, and an inclined portion (5B)
A falling part (5C) for dropping and separating the sludge (S) pulled up from the liquid from the tip of the non-magnetic plate (5), and the sludge (S) contained in the liquid in the separation tank (4) is Sludge (S) adsorbed on the upper surface of the adsorption section (5A) of the non-magnetic plate (5) by the magnetic conveyor (6), and the magnetic conveyor (6) moves the magnet, thereby adsorbing the sludge (S) on the adsorption section (5A). Is transferred in the moving direction of the magnetic conveyor (6), and the sludge (S) to be moved is transferred from the inclined part (5B) to the falling part (5C), and the non-magnetic plate (5) in the falling part (5C). An apparatus for separating sludge contained in a liquid configured to be separated from water.