JPH09271730A - Washing water purifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove oil contained in a washing liquid. SOLUTION: This device is provided with an oil-water separation element 12 of a hollow body for separating the oil contained in the washing element, a washing water introduction pipe 20 for introducing the washing water into the oil-water separation element 12, an oil recovering pipe 32 for recovering the oil floating on the surface of the washing water passing through the oil- water separation element 12, and a washing water recovering pipe 34 for recovering washed washing water in a washing tank 18. Thus, the oil contained in the washing water is adsorbed on the oil-water separation element 12, flocculates and forms coarse particles. Since the oil formed into coarse particles has a large floating power, the oil separates from the oil-water separation element 12, and floats on the water surface of the treating water. By recovering this with the oil recovering pipe 32, the oil contained in the washing water can be separated and recovered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning water purification apparatus capable of removing oil and solids contained in cleaning water.

[0002]

2. Description of the Related Art Conventionally, various types of cleaning water purifying devices used in dishwashers and the like have been proposed. For example, Japanese Utility Model Publication No. 7-5806 discloses a technique for washing tableware by filtering wash water containing oil and solids with a filter, pumping this to a nozzle, and spraying it onto dishes and the like. Has been done.

[0003]

However, in the cleaning water purifying apparatus having the above-mentioned structure, there is a problem that the solids can be removed by the filter but the oil cannot be removed. For this reason, the dishes must be washed with wash water that contains oil,
In some cases, the oil could not be sufficiently removed even by rinsing after washing.

In such a case, it is necessary to replace the cleaning water, but the replacement causes an increase in the amount of water used, the running cost is high, and the cleaning water needs to be hot water of about 60 degrees Celsius. However, there is a problem that power consumption increases and it takes time to reach a predetermined temperature.

Further, since oil contributes to environmental damage, it has been desired to remove oil from the viewpoint of environmental protection. further,
The solid matter can be removed by a filter, but when the filter is clogged, it is necessary to wash the filter, which is troublesome.

[0006] Therefore, an object of the present invention is to provide a cleaning water purifying apparatus which can remove oil and does not require cleaning of a filter or the like.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided in a cleaning tank,
A hollow body oil / water separation element for separating oil contained in the cleaning water, a cleaning water inlet pipe for guiding the cleaning water into the oil / water separation element, and an oil floating on the water surface of the cleaning water passing through the oil / water separation element. It has an oil recovery means and a cleaning water recovery pipe for recovering the cleaned cleaning water.

Therefore, when the washing water containing oil is introduced into the hollow oil-water separation element provided in the washing tank by the washing-water introducing pipe and the washing water passes through the oil-water separating element, the oil is It is adsorbed by the separation element and agglomerates to become coarse particles to form an oil lump with a large buoyancy, which separates from the oil / water separation element and floats on the surface of the wash water. In addition to the above, the cleaning water separated from the oil and purified is collected by the cleaning water recovery pipe.

According to a second aspect of the present invention, the oil-water separation element is rotatably provided, is provided on an outer upper portion of the oil-water separation element, and is a shower nozzle for washing off solid matter attached to the oil-water separation element, It is characterized in that it is provided inside the oil-water separation element and has a hopper for containing the solid matter washed off by the shower nozzle, and a waste water pipe for discharging the solid matter contained in the hopper.

Therefore, the shower nozzle provided on the upper outside of the oil / water separating element washes away the solid matter adhering to the inside of the rotatably provided oil / water separating element and stores it in the hopper, and the fixed matter is discharged by the waste water pipe. I decided to do it.

The invention according to claim 3 is characterized in that a filter net for filtering solids is provided inside the oil-water separation element. Therefore, the solid matter is filtered by the filter mesh provided inside the oil-water separation element when the wash water containing the solid matter passes through the filter mesh.

According to a fourth aspect of the present invention, the oil recovery means has an oil recovery tank, and an upper end of a side plate of the oil recovery tank is formed at substantially the same height as the surface of the washed water. And Accordingly, the oil recovery means is equipped with an oil recovery tank for recovering the oil that has been separated by the oil-water separation element, and the amount of purified cleaning water that flows into the oil recovery tank together with the oil when recovering the oil. In order to reduce the amount, the upper end of the side plate of the oil recovery tank is formed to have substantially the same height as the water surface of the purified wash water.

The invention according to claim 5 is characterized in that a bubble generating means for promoting floating of floating oil is provided at the bottom of the cleaning tank. Therefore, bubbles are generated by the bubble generating means provided at the bottom of the cleaning tank, and the bubbles floating in the cleaning water are adhered to the bubbles or the floating bubbles collide with the oil to increase the levitation force of the oil. It was increased so that the oil quickly reached the surface of the purified water.

The invention according to claim 6 is characterized in that the bottom of the cleaning tank is provided with ozone generating means for accelerating the floating of floating oil and sterilizing and deodorizing the cleaned cleaning water. To do. Therefore, by generating ozone bubbles by the ozone generating means provided at the bottom of the cleaning tank, by adhering the oil floating in the cleaning water to the ozone bubbles or floating ozone bubbles collide with the oil, The levitation force of the oil is increased so that the oil quickly reaches the surface of the purified wash water, and at the same time, the purified wash water is sterilized and deodorized by the ozone sterilization and deodorizing action.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a partially cutaway perspective view of the cleaning water purifying apparatus according to the present embodiment.

The cleaning water purifying device has a cleaning tank 18 in which a hollow cylindrical oil / water separating element 12 is rotatably provided. And the oil-water separation element 1
One end of 2 is closed so that it receives a driving force from the driving source 39 via the driving shaft 14 and rotates. The other end of the oil-water separation element 12 is in contact with the side plate 18a of the cleaning tank 18 which is opened and is opposed via the known sealing means 16.

A wash water introducing pipe 20 is attached to the side plate 18a, and the wash water is introduced into the oil / water separation element 12 from a wash hot water tank (not shown) through the wash water introducing pipe 20. At this time, the sealing means 16 causes the cleaning water introduced into the oil / water separation element 12 to have side plates 18a.
The oil and water separation element 12 are prevented from leaking.

A shower nozzle 22 is provided on the outer upper part of the oil / water separation element 12 for washing off solid matter attached to or accumulated on the inner wall of the oil / water separation element 12.
Is provided.

On the other hand, in the oil / water separation element 12, a hopper 24 having a solid material receiving opening 26 facing the shower nozzle 22 is provided, and the hopper 24 is connected to a waste water pipe 28.

The sewage pipe 28 passes through the inside of the washing water introducing pipe 20 to the outside of the washing tank 18, and then the washing water introducing pipe 2
Separated from 0, it is connected to a processing facility (not shown) (for example, a garbage container). As a result, the shower nozzle 22
The shower water sprayed from the surface wash away the solid matter attached to the inner surface of the oil-water separation element 12, and the solid matter is stored in the solid matter receiving port 26 and conveyed to the treatment facility through the waste water pipe 28.

A box-shaped oil recovery tank 30 having an oil recovery pipe 32 as an oil recovery means is provided above the side plate of the cleaning tank 18, and the floating oil flowing into the oil recovery tank 30 is recovered. Collected by tube 32.

Further, at the lower part of the side plate of the cleaning tank 18, a cleaning water recovery pipe 34 for returning the cleaned cleaning water (treated water) to the cleaning hot water tank is provided.

Next, the principle of removing the oil and solids contained in the wash water by the wash water purifying apparatus having the above-mentioned structure will be described. In order to facilitate the description, description will be given with reference to FIGS. 2 and 3 which are simplified diagrams of the cleaning water purification apparatus shown in FIG. FIG.
Is a schematic cross-sectional view including the oil-water separation element 12, and FIG. 3 is a schematic cross-sectional view in the length direction of the oil-water separation element 12.

The washing water containing solids and oil is introduced into the oil / water separation element 12 by the washing water introducing pipe 20. Then, it passes through the oil / water separation element 12 and flows out of the oil / water separation element 12 to become treated water, and the wash water recovery pipe 3
Recovered from 4.

The oil / water separation element 12 is formed by intertwining fine fibers such as cellulose or polypropylene.
An adsorbent is mixed in it. As a result, the oil / water separation element 12 has a filter action, and the action allows the solid matter in the wash water to be filtered.

On the other hand, the oil dispersed in the washing water in the order of micron is adsorbed on the surface of the fine fibers, and the adsorbed oil is collected (hereinafter referred to as agglomeration) to be coarse particles.

Since the specific gravity of oil is lighter than that of water, buoyancy is increased by coarsening the particles, and finally the adsorption force by the oil / water separation element 12 is increased. As a result, the coarse-grained oil separates from the oil / water separation element 12 and floats on the surface of the wash water.

At this time, the washing water flows out from the inside of the cylindrical oil-water separation element 12 to the outside through the cylindrical surface, so that the oil floats from the outside of the cylindrical surface of the oil-water separation element 12 toward the treated water. Since the treated water that has passed through the oil / water separation element 12 flows toward the purified water recovery pipe 34, the coarse-grained oil also flows toward the purified water recovery pipe 34 while floating in the treated water, and gradually rises. Reach the surface of treated water. The oil that has thus floated and reached the surface of the treated water is recovered from the oil recovery pipe 32.

By the operation described above, the solid matter and oil contained in the wash water are removed. FIG. 4 and FIG. 5 show such an action, and show the flow of wash water in the wash water purification apparatus having the configuration of FIG.

As described above, the oil / water separation element 12
Since the fine fibers are entangled with each other, the solid matter can be filtered, but if used for a long time or in the case of washing water containing a large amount of solid matter, clogging occurs and the subsequent treatment is It will be impossible. Therefore, the oil-water separation element 12
Receives a driving force from the driving source 39 and rotates steadily or periodically.

When the oil / water separating element 12 rotates in this manner, the solid matter attached to the inner surface of the oil / water separating element 12 comes to be located between the shower nozzle 22 and the solid matter receiving port 26. Since shower water is jetted from the shower nozzle 22 toward the oil-water separation element 12, the shower water causes the solid matter to be washed and dropped.

The dropped solid matter is received by a solid matter receiving port 26 provided facing the shower nozzle 22, and is carried out of the washing tank 18 by a dirty water pipe 28 communicating with the solid matter receiving port 26. Therefore, it is not necessary for the user to take out and process the solid matter attached to the oil / water separation element 12.

If the solid deposition rate is higher than the rotation speed of the oil / water separation element 12, the oil / water separation element 12 becomes clogged in a short time, and as a result, the water level of the washing water in the oil / water separation element 12 rises. However, a situation occurs in which the solid matter flows into the solid receptacle 26. Therefore, the rotation speed of the oil / water separation element 12 needs to be set in consideration of the size of the oil / water separation element 12, the amount of solids, the treatment speed of the wash water (flow rate of the wash water), and the like.

Treated water is used as the shower water used for the shower ring, and the amount of the shower water is a few percent of the total treated water. Further, since most of the shower water bounces off the surface of the oil-water separation element 12, the amount of the treated water flowing into the solid matter receiving port 26 is about 1%, and the treated water is not wasted. .

When the floating oil is directly recovered from the oil recovery pipe 32, when the oil recovery pipe 32 has a circular shape or has a small pipe diameter, a large amount of treated water flows in at the same time. Therefore, an oil recovery tank 30 is provided to recover only the floating oil or to reduce the amount of outflowing treated water.

The oil recovery tank 30 is opened upward, and its upper end on the side surface is set to be flush with the surface of the treated water (see FIG. 5). That is, the supernatant of the treated water in which the oil is suspended flows into the oil recovery tank 30. As a result, the amount of treated water flowing into the oil recovery tank 30 is reduced, and the treated water can be effectively used.

Next, a second embodiment will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. As described above, the oil coarsened by the oil / water separation element 12 floats due to the difference in specific gravity from the treated water. However, it takes a finite time for the floating oil to reach the surface of the treated water. Reducing this time makes the size of the cleaning tank 18 compact, and consequently enables the cost reduction of the cleaning water purifying apparatus 10.

The oils floating in the treated water have different sizes, and therefore have different buoyancy. Therefore, the time to reach the surface of the treated water is different. Therefore, the separated oil may not be recovered in the oil recovery tank 30.

The uncollected oil becomes remarkable when the rotation speed of the oil / water separation element 12 is high or when the flow of treated water is large. That is, when the rotation speed of the oil-water separation element 12 is high, the washing water and the treated water are agitated by the rotation of the oil-water separation element 12, so that coarse graining becomes insufficient, or redispersion of coarse grained oil occurs Oil recovery tank 3
This is because it is recovered from the wash water recovery pipe 34 before being recovered by 0. This also occurs when the flow velocity of treated water is high.

From this point of view, it is desired to make the washing tank 18 large, or to reduce the flow velocity of the treated water and the rotation speed of the oil-water separation element 12. However, as described above, these make the washing tank 18 large. Decrease the cleaning process speed.

Therefore, in the present embodiment, the bubble generating means for assisting the floating of the oil contained in the treated water to shorten the floating time is provided on the bottom surface of the cleaning tank 18. As a result, the uncollected oil can be reduced and the cleaning tank 18 can be made compact,
At the same time, the cleaning water processing speed is not sacrificed.

The bubble generating means 36 comprises a filter 36a and an air pump 36b, and air is sent from the air pump 36b to the filter 36a to cause the filter 3
Small bubbles are generated from 6a.

Since the air bubbles have the property of selectively adhering to the hydrophobic particles, they adhere to the floating oil to enhance the floating force of the oil, or hit the oil to assist the floating of the oil. This shortens the time required for the oil to reach the surface of the treated water.

It should be noted that ozone generating means may be used instead of the bubble generating means. In this case, the air pump 36b in the bubble generating means 36 serves as an ozone generator. By using ozone in this way, in addition to the effect that the bubbles accelerate the floating of the oil, the ozone sterilizes and deodorizes the treated water. Therefore, the hygiene condition can be improved.

Next, a third embodiment will be described.
The same components as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

In the above description, the solid matter contained in the wash water is filtered by the oil / water separation element 12. However, when the solid matter is about the size of the mesh of the oil / water separation element 12, a situation may occur in which it is trapped between the fine fibers constituting the oil / water separation element 12.

In the case of a fibrous solid, the fibers may be entangled with the fibers of the oil / water separation element 12 and may not fall off even if washed with a nozzle.

Therefore, in the present embodiment, a filter net 38 is provided on the inner wall of the oil / water separation element 12. Providing the filter net 38 in this way has the advantage that the mesh size of the filter net 38 can be selected according to the size of the solid matter, and even if the solid matter is fibrous, Since the degree of entanglement of the solid matter with the filter net 38 is reduced, it is possible to easily remove the solid matter even by cleaning with a nozzle.

In each of the embodiments described above, it is premised that the cleaning product contains solids and oil. However, when the cleaning product contains only oil, for example, the first stage of cleaning with water is performed. In the case where a separate filter is provided for the treatment, a solid material collecting means such as a hopper becomes unnecessary.

Further, the case where an adsorbent is mixed in the oil / water separation element 12 has been described. However, since the cleaning water flows from the inside to the outside of the oil / water separation element 12 as described above, the adsorbent is not always necessary. Not. That is, since the wash water flows from the inner side to the outer side of the cylindrical surface of the oil / water separation element 12, the action of the adsorbent is substituted by the flow.

Further, in the above description, the cleaning water is introduced from one side surface of the oil-water separation element 12 and flows out from the cylindrical surface. However, as shown in FIG. You may make it flow out.

[0052]

According to the present invention, the washing water is introduced into the oil-water separation element, and the oil content is separated by aggregating and coarsening the micron-order oil contained in the washing water in the oil-water separation element. It became possible to easily remove oil, which reduced the number of exchanges of wash water and reduced running costs.

Further, by rotating the oil / water separation element, the solid matter contained in the wash water is adhered or accumulated inside the oil / water separation element, and this is dropped by the shower water into the solid receiving port of the hopper, so that the solid matter is removed simultaneously with the removal of the oil. You can also remove things.

Further, since the filter net is provided inside the oil-water separation element, it is possible to remove oil and to separate the material suitable for the size of the solid material.

Further, since the oil recovery means is provided, it is possible to reduce the amount of treated water contained when recovering the separated oil, so that the water resources are effectively used.

Further, since the bubble generating means is provided, the floating of the separated oil is promoted, whereby the leakage of the separated oil can be prevented and the cleaning tank can be downsized, and the cleaning water purifying apparatus can be realized. It has become possible to reduce costs.

Further, since the ozone generating means is provided, the floating of the separated oil is promoted, which prevents leakage of the separated oil and enables downsizing of the cleaning tank. It has become possible to reduce costs. In addition, since the cleaning water or the treated water is sterilized and deodorized by ozone, the sanitary condition of the cleaning water can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a schematic configuration of a cleaning water purifying apparatus according to the present invention.

FIG. 2 is a schematic diagram for explaining a cleaning principle in the cleaning water purification apparatus according to the present invention.

FIG. 3 is a schematic diagram for explaining a cleaning principle in the cleaning water purification apparatus according to the present invention.

FIG. 4 is a schematic cross-sectional view of a cleaning water purification apparatus applied to the description of the first embodiment.

FIG. 5 is a schematic cross-sectional view of a wash water purification apparatus applied to the description of the first embodiment.

FIG. 6 is a schematic cross-sectional view of a cleaning water purification apparatus applied to the description of the second embodiment.

FIG. 7 is a schematic cross-sectional view of a wash water purification apparatus applied to the description of the third embodiment.

FIG. 8 is a top view showing a schematic configuration of a cleaning tank of another embodiment.

[Explanation of symbols]

 10 Washing Water Purification Device 12 Oil-Water Separation Element 16 Sealing Means 18 Washing Tank 20 Washing Water Introducing Tube 22 Shower Nozzle 24 Hopper 26 Solids Receiving Port 28 Sewage Pipe 30 Oil Recovery Tank 32 Oil Recovery Pipe 34 Cleaning Water Recovery Pipe 36 Foaming Means 38 Filter mesh

Claims (6)

[Claims] 1. An oil / water separation element that is provided in the cleaning tank and separates oil contained in the cleaning water, a cleaning water inlet pipe for guiding the cleaning water into the oil / water separation element, and an oil / water separation element. A wash water purifying apparatus comprising: an oil collecting means for collecting oil floating on the surface of the wash water that has passed through, and a wash water collecting pipe for collecting purified wash water. 2. The oil-water separation element is rotatably provided, and is provided on the outer upper part of the oil-water separation element to wash off solid matter adhering to the oil-water separation element, and inside the oil-water separation element. The cleaning water purification system according to claim 1, further comprising: a hopper that is disposed and that stores the solid matter that is washed off by the shower nozzle, and a waste water pipe that discharges the solid matter that is stored in the hopper. apparatus. 3. A filter net for filtering solids is provided inside the oil-water separation element.
The cleaning water purification device described. 4. The oil recovery means has an oil recovery tank, and an upper end of a side plate of the oil recovery tank is formed at substantially the same height as a water surface of the washed water. 3. The cleaning water purifying device according to any one of 3 above. 5. The cleaning water purifying apparatus according to claim 1, wherein a bubble generating means for promoting floating of floating oil is provided at the bottom of the cleaning tank. 6. The ozone generating means for accelerating floating of floating oil and sterilizing and deodorizing washed cleaning water is provided at the bottom of the cleaning tank. The cleaning water purifier according to any one of claims.