JPH06226016A - Tank of type built into liquid filter device - Google Patents

Abstract

PURPOSE:To facilitate exchange of adsorbents for agglomerating particles in liquid to several hundred pieces of lumps by installing a container for housing these adsorbents into a tank in such a manner that the container can be easily installed and taken out from above the tank. CONSTITUTION:The container 5 which is installed housably removably into the tank 3 from above the tank and has network-like bodies or filter-like bodies 5a on the bottom and network-like bodies or filter-like bodies 5b on the upper plane and the granular or powdery adsorbents 6 which are housed in the container 5 and consist essentially of magnesium, potassium, aluminum borate, glass wool and cellulose are housed into the tank 3. The liquid flowing from a liquid inflow port into the tank is run from the network-like bodies or filter- like bodies 5b on the base of the container 5 via the adsorbents 6 toward the network-like bodies or filter-like bodies 5b on the upper plane of the container 5 and is discharged outside the tank 3 from a liquid outflow port; thereafter, the liquid is filtered by a filter device 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filter device having a tank itself for containing cleaning liquid, organic solvent, cutting liquid, oil, water, etc., which has a function of filtering impurities mixed in the liquid. It concerns a mold tank.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional device for filtering cutting fluid, for example. In the figure, after the dirty cutting fluid after cutting the work in the cutting machine is stored in the cutting tank 1,
It is pumped up by the pump 2, filtered by the filtering device 13, and then supplied to the object to be cut. The filtration device 13 includes double mesh electrodes 14 and 15 arranged in a donut shape, and an adsorbent 1 housed in the double mesh electrodes 14 and 15.
6 and a filter 17 installed in a donut-shaped hollow portion
And a pressure vessel 18 for accommodating them.

[0003]

The conventional device is constructed as described above, and the adsorbent 16 is added to the double mesh electrode 1
It is housed in 4, 15 and installed so as to surround the filter 17 and installed in the pressure vessel 18. For this reason,
To replace the adsorbent 16, remove the lid of the pressure vessel 18,
Double mesh electrode with a narrow space and a deep depth 1
There was a problem that the replacement work had to be troublesome because it had to be replaced from inside.

The present invention has been made in order to solve the above-mentioned problems of the conventional ones. The tank itself is provided with a filtering function, and a container for storing an adsorbent is installed in the tank so that it can be taken out. A voltage is applied between the tank and the container to electrostatically aggregate impurities in the liquid, or as an adsorbent,
Magnesium, potassium, aluminum borate, glass wool, cellulose composed of at least any one of the granular body or powdered body, by measuring the mutual distance of the impurity particles in the liquid Alternatively, by aggregating, the impurity particles are narrowed to a distance where they can agglomerate, and the impurities in the liquid pass through the adsorbent to agglomerate without applying a voltage. The purpose is to provide a mold tank.

[0005]

According to the present invention, there is provided an upper surface open type tank having a liquid inflow port at a lower portion or a side surface and a liquid outflow port at an upper portion, and the tank is housed in the tank so as to be taken out from above. At least one of the bottom surface or the side surface and the upper plane has a mesh-like body or a filter-like body,
Between at least one of the bottom surface or the side surface, a container that allows liquid to pass through to the upper plane, a mesh body or a filtration body of the bottom surface or the side surface in the container, and a mesh body or a filtration body of the upper plane. And an adsorbent composed of a granular body or a powdered body, and a filtering device for filtering the liquid flowing out from the liquid outlet of the tank,
A voltage is applied between the container and the tank to electrostatically aggregate impurities mixed in the liquid, or the adsorbent is at least one of magnesium, potassium, aluminum borate, glass wool, and cellulose. It is composed of a granular material or a powdery material as a main component, and the impurity particles in the liquid may be aggregated by entanglement or aggregation of the impurity particles. The distance was narrowed, and impurities in the liquid passed through the adsorbent to cause aggregation without application of voltage.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing an embodiment of the present invention.
In the figure, a work tank 1 stores, for example, a cleaning liquid, an organic solvent, a cutting liquid, oil, water, etc., and is circulated in a line by a pump 2. The tank 3 is, for example, an open-up type tank in which the cleaning liquid, the organic solvent, the cutting liquid, the oil, the water, etc. in the work tank 1 are supplied by the pump 4, and the tank 3 has an inlet 3a at the bottom or the side and And an outlet 3b. The container 5 is installed in the tank 3 so as to be taken out from above, and has a bottom surface and an upper flat surface.
It has mesh bodies or filtration bodies 5a and 5b, and allows liquid to pass from the bottom surface to the upper plane. The adsorbent 6 is housed between the mesh body or filter body 5a on the bottom surface and the mesh body or filter body 5b on the upper plane, and is made of, for example, magnesium, potassium, aluminum borate, glass wool, or cellulose. It is composed of a granular material or a powdery material containing at least one of them as a main component. The insulating material 7 is
The container 5 and the tank 3 are insulated from each other. The sub tank 8 stores the liquid that has overflowed from the outlet 3b. The pump 9 filters the liquid in the sub tank 8 with the filter device 1.
It is circulated in the work tank 1 through 0.

Next, this operation will be described with reference to FIG. FIG. 2 shows a potential characteristic curve in which the vertical axis represents the repulsive force P ₁ and the attractive force P ₂ , and the horizontal axis represents the interparticle distance L between the impurity molecules A and B. When the impurity molecules A and B are mixed in the liquid,
The potential of the liquid molecules themselves around the impurity molecules A and B,
Due to the potential difference between the potentials of the impurity molecules A and B themselves, a zeta potential is generated around the impurity molecules A and B. Impurity molecules other than metals have a -potential, and repel each other due to the zeta potential of the same potential, and the repulsive force P ₂ is 0 at a distance L ₁ .
And is stable. In this state, if some force is applied and the distance between the impurity molecules A and B is reduced, the repulsive force P ₁ increases as shown by the characteristic curve i in FIG.
_When approaching ₂ or less, attractive force P ₂ acts to cause electrostatic aggregation.
When the liquid is oil, a high voltage DC450V is applied, so that both the oil molecules and the impurity molecules A and B are DC450V,
The zeta potential is canceled and immediately causes electrostatic aggregation as shown by the characteristic curve iii in FIG. When the liquid is water-based, hydrogen gas is generated when the energization current value exceeds 10 mA, so that, for example, only a low voltage DC2V can be applied. With DC2V,
Since there is no great difference from the ground potential, electrostatic aggregation does not occur as shown by the characteristic curve ii in FIG. In order to generate electrostatic coagulation under any condition, if the distance L between the impurity molecules A and B is set to the distance L ₂ or less by the action of the adsorbent 6, the coagulation occurs without applying a voltage. Can be caused.

In the embodiment shown in FIG. 1, the liquid poured into the tank 3 by the pump 4 flows from the lower part of the container 2 and passes through the adsorbent 6 through the mesh body or the filter body 5a on the bottom surface. , To the sub-tank 8 through the mesh or filter 5b of the upper plane and the outlet 3b. The liquid accumulated in the sub tank 8 is circulated in the work tank 1 by the pump 9 via the filter device 10. In this case, the contact electrode (not shown) contacts the container 5 and the tank 1
Since the voltage is applied between the container 5 and the container 5, when the liquid is oil, the impurity molecules in the oil immediately cause electrostatic aggregation as shown by the characteristic curve ii in FIG. 2 and pass through the adsorbent 6. When it does, it further causes electrostatic agglomeration to form hundreds of lumps. On the other hand, when the liquid is water-based, the characteristic curve ii in FIG.
As in i, electrostatic agglomeration does not occur immediately, but when passing through the adsorbent 6, the mutual distance between the impurity particles in the liquid is determined by entanglement or agglomeration of the impurity particles. Narrow to a distance where they can cause electrostatic agglomeration to surely cause agglomeration to form hundreds of lumps. Impurity molecules thus formed into hundreds of lumps are
Then, the impurities are individually filtered by a filter having a sufficiently large filter for each impurity molecule.

The conditions for causing electrostatic coagulation are various depending on the viscosity of the liquid, the flow velocity, the size of the impurities, the mass, the voltage value, the voltage application time, etc., and even if the liquid is oil, it is certain. It is very difficult to cause electrostatic agglomeration in the. The adsorbent 6 of the embodiment shown in FIG. 1 is a special adsorbent for surely causing electrostatic coagulation under any conditions, and is made of a granular or powdery substance such as magnesium, potassium, and aluminum borate. , Glass wool, or cellulose as a main component, and the impurity molecules A and B shown in FIG. 2 are entangled or aggregated to determine the distance between the impurity molecules A and B as shown in FIG. It causes aggregation by approaching L ₂ or less. This is a special one that does not cause electrostatic cohesion at all with generally known adsorbents, activated carbon, activated clay and the like. For example, the adsorbent 6 containing magnesium as a main component reacts magnesium sulfate with magnesium hydroxide in the presence of a special phosphate to generate fibrous crystals by hydrothermal reaction. In addition, as its components, for example, basic magnesium sulfate> 94%, magnesium hydroxide <6%, and magnesium silicate <0.5% in weight%. In addition, as this weight%, basic magnesium silicate: 8
5% to 98%, magnesium hydroxide: 1% to 10%, and magnesium silicate: 0.1% to 1% are suitable. Further, the adsorbent 6 containing cellulose as the main component is produced by acid-hydrolyzing the selected pulp, washing with filtered water, dehydration and drying, and then pulverizing, or separating the selected pulp into short fibers, and then dehydrating and drying, Generate by crushing.

FIG. 3 shows another embodiment of the present invention. That is, the sub-tank 8 shown in FIG. 1 is used as an oil / water separator 11, and the oil / water separator 11 has an opening 11a at the bottom.
It is divided into a first chamber 11c and a second chamber 11d by a partition wall 11b having a. The first chamber 11c is provided with an outflow port 3b from the tank 3 and an oil outlet port 11e, and the second chamber is provided at a position substantially the same as or slightly lower than the outflow port 3b, and at the oil outflow port. 10 from 11e
An outlet 11f to the pump 9 is provided at a position lower by mm.

For example, when a cleaning liquid in which oil is emulsified and mixed flows into the tank 3 through the inflow port 3a,
Impurities are adsorbed and removed by the adsorbent 6, and the oil and the washing liquid are separated fairly clearly. The separated oil and cleaning liquid flow into the oil-water separation device 11 and the first chamber 1
In 1c, the oil having a low specific gravity floats upward, and the cleaning liquid having a high specific gravity settles downward. For this reason, the cleaning liquid is opened 11
It flows into the second chamber 11d via a and flows into the pump 9 from the outlet 11f. On the other hand, when the oil component floating in the first chamber 11c is accumulated at a level difference between the outlet 11f and the oil outlet 11e, the oil component flows out from the oil outlet 11e and is collected by, for example, a drum. In this way, for example,
Even with the emulsified cleaning liquid, the oil / water separation can be easily performed by the general oil / water separator 11 by passing the adsorbent 6 at one end. The partition wall 1
If the number of 1b is increased, oil-water separation can be performed more reliably, and the liquid flowing out from the outlet 11f may be once stored in the tank and then pumped out by the pump 9.

FIG. 4 shows another embodiment of the present invention. That is, the oil-water separator 11 shown in FIG. 3 is installed in the front stage of the tank 3, and is used when oil and liquid can be easily separated by the difference in specific gravity. That is, the liquid flowing into the first chamber 11c from the inflow port 3a flows into the second chamber 11d through the opening 11a due to the difference in specific gravity between the oil and the liquid, and is pumped from the outflow port 11f by the pump 12 to the tank. Three
Sent in. On the other hand, the oil component floats upward in the first chamber 11c, and when the oil component floating and accumulated reaches the oil distribution outlet 11e located at a position higher than the level of the discharge outlet 11f, it flows out from the oil distribution outlet 11e. , Stored in drums, etc. The outflow port 11f is installed at the same level as or lower than the inflow port 3a.

FIG. 5 shows another embodiment of the container 5 of the present invention. In FIG. 5, a mesh-like body or a filtration body 5a
Is provided on the side surface of the container 5a and is used to widen the liquid passage area when the bottom surface has a small liquid passage area. The partition plate 13 forms a communication path 13a in the lower part of the container 5, and is provided so that the liquid that has passed through the mesh-like body or the filter-like body 5a on the side surface always passes through the adsorbent 6. That is, since the container 5 of each of the embodiments shown in FIGS. 1, 3, and 4 is provided with the mesh body or the filtration body 5a on the bottom surface,
There is a limit to the liquid passage area. Therefore, a mesh-like body or a filter-like body 5a is also provided on the side surface of the container 5 to increase the passage area of the liquid. In addition, in the embodiment of FIG. 5, the mesh body or the filtration body 5a is provided only on the side surface of the container 5, but the mesh body or the filtration body 5a may be provided on both the side surface and the bottom surface of the container. .

In each of the above embodiments, the voltage is applied as the adsorbent 6, for example, a granular material or powder containing at least one of magnesium, potassium, aluminum borate, glass wool and cellulose as a main component. It is not always necessary when using the shape. Further, the filter device 10 may be integrally provided in the tank 3. Furthermore, as the adsorbent 6, for example, a substance having a large mass such as activated clay is placed in the lower part, and a substance having an electrostatic aggregating action, such as a granular or powdery substance containing magnesium as a main component, is placed above the adsorbent 6. Further, a large-mass material such as activated clay may be placed thereon to prevent the light-mass adsorbent 6 from soaring or flowing out. Furthermore, the adsorbent 6 may be housed in, for example, a cage such as a resin, the adsorbent 6 may be formed into a cassette, and the entire cage may be replaced. Furthermore, in each of the embodiments, an open-top tank without a lid is shown as the tank 3, but a tank with a removable lid at the top is regarded as an open-top tank.

[0015]

As described above,

According to the invention of claim 1, a container accommodating the adsorbent is installed in the tank so that it can be taken out, and a voltage is applied between the tank and the container to electrostatically agglomerate impurities in the liquid or to adsorb the impurities. The agent is composed of a granular or powdery material containing at least one of magnesium, potassium, aluminum borate, glass wool, and cellulose as a main component, and the mutual distance between the impurity particles in the liquid By entwining or by aggregating,
Impurity particles are narrowed to a distance where they can agglomerate, and impurities in the liquid pass through the adsorbent to cause agglomeration without applying a voltage, and then filter with a coarse filter. And since the tank itself is equipped with a filtration function, the device can be made simple and compact,
Further, it has an effect of facilitating the exchange of the adsorbent.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a liquid filtration device built-in type tank according to the present invention.

FIG. 2 is a potential energy characteristic diagram which is an operation explanatory diagram of FIG.

FIG. 3 is a side cross-sectional view showing another embodiment of the liquid-filtering-device built-in type tank according to the present invention.

FIG. 4 is a side sectional view showing still another embodiment of the liquid filtering device built-in type tank according to the present invention.

FIG. 5 is a side sectional view showing another embodiment of the container used in the liquid-filtration-device built-in type tank according to the present invention.

FIG. 6 is a side sectional view showing a conventional liquid filtering device.

[Explanation of symbols]

 3: Tank 5: Containers 5a, 5b: Mesh-like or filtered material 6: Adsorbent 10: Filter device 11: Oil-water separator

Claims (1)

[Claims] 1. An open-top tank having a liquid inlet in a lower portion or a side surface and a liquid outlet in an upper portion; and a tank that is housed in the tank so as to be taken out from above, and at least one of a bottom surface and a side surface, A container having a mesh body or a filter body in the upper plane and allowing liquid to pass from at least one of the bottom surface or the side surface to the upper plane, and a mesh body or a filter body in the bottom surface or the side surface in the container. -Like body and an adsorbent that is housed between the mesh-like body or the filter-like body in the upper plane and is made of a granular body or a powder body, and a filtration device that filters the liquid flowing out from the liquid outlet of the tank. And a voltage is applied between the container and the tank to electrostatically agglomerate impurities mixed in the liquid, or the adsorbent is made of magnesium, potassium or aluminum borate. Nuclear, glass wool, or cellulose as a main component at least one of which is a granular or powdery substance, and the mutual distance of the impurity particles in the liquid is obtained by entanglement or aggregation of the impurity particles. The impurity particles are narrowed to a distance at which aggregation can occur, and impurities in the liquid pass through the adsorbent to cause aggregation without application of a voltage. Liquid filtration device built-in type tank.