JP2004300513A - Oil-water separation method, and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continuously, rapidly and securely perform oil-water separation, e.g., in a cleaning liquid in which oil is intruded with high efficiency. <P>SOLUTION: In the oil-water separation method, a non-porous basket 2 is arranged inside a frame 1 freely rotatably at a high speed. In the basket 2, an oil-water separation chamber 10 is formed at the lower direction via a horizontal diaphragm 8 having a diameter shape slightly smaller than the inside diameter thereof, and a spill port 11 is formed at the side direction thereof in such a manner that each is communicatively divided. Further, the inside of the oil-water separation chamber 10 is provided with a feed pipe 15 for the liquid to be treated and a suction pipe 16 for oil components through the diaphragm 8 from the upper direction, respectively, so as to be inserted. Then, the basket 2 is rotated at a high speed, the liquid to be treated is successively charged inside the oil-water separation chamber 10, the oil components and the water components having different specific gravities are annularly separated so as to be a two shape of internal and external layers along the inside face of the oil-water separation chamber 10 by the action of centrifugal force. Thereafter, the separated water components are exhausted from the spill port 11, and the separated oil components are exhausted to the outside via the suction pipe 16, respectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an oil-water separation method mainly used for separating an oil component mixed in a cleaning liquid and regenerating the cleaning liquid, and an apparatus therefor.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a work of a metal product has been cleaned by cleaning a dirt such as oil attached to the work with a cleaning liquid after processing. After the cleaning process, the cleaning liquid mixed with the oil is separated into oil water, regenerated, and reused.
By the way, as a method for separating oil-water from the washing liquid, a floating separation method (Japanese Patent Application Laid-Open No. Sho 62-144597) (Patent Document 1), an electrostatic separation method (Japanese Patent Application Laid-Open No. Hei 7-227503) (Patent Document 2), or And a coalescer method (JP-A-6-315681) (Patent Document 3) and the like are known.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned flotation method separates the washing liquid into oil and water because the oil component is coagulated by a chemical such as an emulsion breaker and floated and separated, but the operation is very troublesome. Not only takes much time, but also takes a relatively long time, resulting in extremely poor oil-water separation efficiency.
In addition, the electrostatic separation method is a method in which oil is aggregated by an electrostatic action to cause the oil to float, and the coalescer method is a method in which a washing liquid is passed through a packed layer of granular materials and fibers to combine oil particles. The separation is promoted by promoting the coarsening, and both are very troublesome and troublesome as in the above-mentioned flotation separation method, and also require a relatively long time, and the oil-water separation efficiency is extremely poor. Had become something.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 62-144597 [Patent Document 2]
JP-A-7-227503 [Patent Document 3]
JP-A-6-315681
The present invention solves the above-mentioned problems of the conventional example, and can continuously and efficiently separate a liquid to be treated such as a cleaning liquid into which oil is mixed, quickly and reliably, and an oil-water separation method. It is intended to provide a device.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention is directed to a non-porous shape in which an oil-water separation chamber and an overflow are respectively formed below and laterally through a horizontal partition plate so as to communicate with each other. The liquid to be treated was sequentially charged into the oil / water separation chamber while the basket was rotated at high speed, and the oil and water having different specific gravities were annularly separated into two layers inside and outside along the inner surface of the oil / water separation chamber by the action of centrifugal force. Thereafter, the gist of the present invention is a method of separating oil and water, wherein the separated water is sequentially discharged to the outside through the overflow port, and the separated oil is sequentially discharged to the outside through the suction pipe.
[0007]
According to a second aspect of the present invention, there is provided a horizontal partition in which a non-porous basket is disposed in a required frame so as to be rotatable at a high speed and has a diameter slightly smaller than the inner diameter of the basket. An oil / water separation chamber is formed below the plate and an overflow port is formed on the same side in a communicating manner, and the oil / water separation chamber is provided with a supply pipe for the liquid to be treated and an oil suction pipe for the oil through a partition plate from above. And an oil-water separator.
[0008]
In the oil-water separator according to the second aspect, distributors are erected on the inner bottom surface of the basket at predetermined intervals.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described based on an example shown in the drawings.
1 to 5 show one embodiment of the present invention. In the drawings, reference numeral 1 denotes a rectangular frame having a required width and height, and reference numeral 2 denotes a frame in the frame 1. A cylindrical non-perforated basket 5 with a lid 4 disposed at a high speed and rotatable via a heater 3 is a substantially trumpet-shaped erect member which is provided at the center of the inner bottom surface of the basket 2 via a mounting member 6. A distributor 7 is a supply port for the cleaning liquid to be treated, which is defined between the lower end of the distributor 5 and the inner bottom surface of the basket 2, and a circle 8 is disposed horizontally at the upper end of the basket 2. The partition plate 8 is formed to have a diameter slightly smaller than the inner diameter of the upper end portion of the basket 2 and is suspended from the lower surface of the lid 4 via a mounting member 9 so as to rotate at a high speed in synchronization with the basket 2. ing. Reference numeral 10 denotes an oil / water separation chamber formed below the partition plate 8 in the basket 2 via the partition plate 8, and reference numeral 11 denotes a side of the upper end portion of the basket 2 via the partition plate 8 which communicates with the oil / water separation chamber 10. An overflow port 12 is formed in an annular shape on the side, 12 is a communication port formed annularly in the lid 4 to communicate with the overflow port 11, and 13 is a basket 2 to communicate with the communication port 12 through a drainage passage 14. A tank for regenerating cleaning liquid is annularly disposed at a predetermined interval on the outer periphery, and the tank for regenerating cleaning liquid 13 is connected to a required storage tank for cleaning liquid (not shown) via a liquid feed pipe (not shown). I have. Reference numeral 15 denotes a supply pipe for the cleaning liquid to be processed, which is inserted into the distributor 5 from above through the lid 4, the partition plate 8, and the oil / water separation chamber 10, and reference numeral 16 denotes the inside of the oil / water separation chamber 10 from above through the cover 4, the partition plate 8. The oil suction pipe 18 with a suction nozzle 17 inserted therein is a hydraulic cylinder which is pivotally mounted via a crank 19 to the outside of the oil suction pipe 16 for rotating the oil suction pipe 16. In addition, O indicates a separated oil layer, and W indicates a separated water layer.
[0010]
Next, the operation of the embodiment configured as described above will be described.
First, the oil suction pipe 16 is rotated at a predetermined angle by the hydraulic cylinder 18, and the suction nozzle 17 at the tip is set at the position where the separated oil separation layer O is generated. Thereafter, the motor 3 is started and the partition plate 8 together with the basket 2 is rotated at a high speed in the direction indicated by the arrow in FIG. Next, the cleaning liquid to be treated mixed with oil is successively introduced into the distributor 5 through the supply pipe 15 and is uniformly distributed through the supply port 7 by the action of the centrifugal force generated by the high-speed rotation of the basket 2 to sequentially remove the cleaning liquid. And separate it into oil and water sequentially due to the difference in specific gravity. Then, as shown in FIG. 5, while raising the separated water having a large specific gravity along the inner peripheral surface of the oil-water separation chamber 10, a substantially outer annular separated water layer W is generated, and the oil component having a small specific gravity is generated. While raising along the inner peripheral surface of the separated water layer W, a substantially inner annular separated oil separation layer O is generated. When the separated water layer W reaches the lower surface of the partition plate 8, the separated water is caused to sequentially flow outward through the overflow port 11, and flows into the regenerating cleaning liquid tank 13 through the communication port 12 and the drainage path 14. On the other hand, the separated oil of the separated oil layer O is discharged outward through the oil suction pipe 16 while being suctioned by the suction nozzle 17.
[0011]
In the above embodiment, the cleaning liquid is shown as the liquid to be treated, but the present invention is not limited to this, and the present invention can also be applied to the separation of cleaning water containing oil and oil / water separation such as factory drainage.
[0012]
【The invention's effect】
According to the first aspect of the present invention, as described above, the non-porous basket, in which the oil-water separation chamber and the overflow are partitioned and formed below and beside each other via the horizontal partition plate at a high speed, is rotated at a high speed. Then, the liquid to be treated is sequentially charged into the oil / water separation chamber, and the oil and water having different specific gravities are annularly separated along the inner surface of the oil / water separation chamber into two layers inside and outside by the action of centrifugal force. Are sequentially discharged to the outside through the overflow port, and the separated oil is sequentially discharged to the outside through the suction pipe. Therefore, the centrifugal force is used continuously, quickly, and reliably. The washing liquid can be efficiently separated into oil and water.
[0013]
According to the second aspect of the present invention, as described above, a non-porous basket is arranged in a required frame so as to be freely rotatable at a high speed, and the basket has a horizontal diameter slightly smaller than its inner diameter. An oil / water separation chamber is formed below and below the partition plate, and an overflow port is formed on the same side in a communicating manner, and the supply pipe for the liquid to be treated and the oil suction are passed through the partition plate from above in the oil / water separation chamber. Since the pipes are inserted respectively, the non-porous basket is rotated at high speed, and the liquid to be treated is sequentially charged into the oil-water separation chamber, and the specific gravity differs along the inner surface of the oil-water separation chamber by the action of centrifugal force. After the separated oil and water are separated into two layers in the inner and outer layers, the separated water can be sequentially discharged to the outside through the overflow port, and the separated oil can be sequentially discharged to the outside through the suction pipe. And cleansing solution Continuously in, moreover, quickly, and those that can be allowed to reliably separate the efficiently oil-water.
[0014]
According to the third aspect of the invention, since the distributors are erected at predetermined intervals on the inner bottom surface of the basket, the liquid to be supplied to be washed and the like can be evenly distributed. The oil-water separation of the washing liquid and the like can always be carried out smoothly and reliably.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing an oil-water separation device according to the present invention.
FIG. 2 is a plan view showing an oil-water separation device according to the present invention.
FIG. 3 is a sectional view taken along the line II of FIG. 1;
FIG. 4 is a partial sectional view showing an operation state of the oil-water separation device according to the present invention.
FIG. 5 is a plan view showing a state in which the cleaning liquid is separated into oil and water by the oil and water separator according to the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 frame 2 basket 3 distributor 8 partition plate 10 oil / water separation chamber 11 overflow port 15 supply pipe for cleaning liquid to be treated 16 oil suction pipe O separated oil separation layer W separated water layer

Claims (3)

The liquid to be treated is sequentially poured into the oil / water separation chamber while rotating the non-porous basket, in which the oil / water separation chamber and the overflow are partitioned and formed below and laterally through the horizontal partition plate at high speed, respectively. After the oil and water having different specific gravities are annularly separated into two layers inside and outside along the inner surface of the oil-water separation chamber by the action of centrifugal force, the separated water is sequentially discharged outward through the overflow port, and the separated oil is separated. Characterized by sequentially discharging the water to the outside through a suction pipe. A non-porous basket is rotatably arranged in the required frame at a high speed, and an oil / water separation chamber is provided below the basket through a horizontal partition plate having a diameter slightly smaller than the inside diameter of the basket. An overflow port is formed on each side in a communication manner, and a supply pipe for a liquid to be treated and a suction pipe for oil are inserted into the oil / water separation chamber through a partition plate from above. , Oil-water separator. 3. The oil / water separator according to claim 2, wherein distributors are erected at predetermined intervals on the inner bottom surface of the basket.

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