KR20000013471A - Method and device for separating oil from water - Google Patents

Abstract

PURPOSE: A method and a device for centrifugal separating a waste water of an emulsion state by using a difference of specific gravity of oil and water. CONSTITUTION: A method for separating oil from water in waste water contains: supplying the waste water of an emulsion state being formed by dissolving the oil in a water reserving container(1) into plural separating spaces(4), (4') being formed in a rotating container(2) for separating; rapidly rotating the waste water for separating the oil particle from the water particle in the waste water by using a centrifugal force; discharging the water without the oil particle toward the lower side of the rotating container; overflowing the oil particle over the rotating container(2) for being stayed on the water surface of the purified water being stored in the water reserving container; and discharging the pure oil staying on the water surface of the purified water through an oil discharging aperture(101) of the water reserving container.

Description

Oil-water separation method and apparatus

The present invention relates to a method and apparatus for centrifuging an emulsion waste water by dissolving oil in water by using a specific gravity difference between oil and water. Traditionally, the reservoir is installed inside the reservoir to save some uncontaminated water ("clean water") to some extent, and then supplies waste water and rotates it by rotating the rotating cylinder to make oil float on the surface and separate the oil The separated water is centrifugally discharged to the lower side of the rotary tube, so that the separation method and structure for separating pure oil from the wastewater can be obtained with a simple separation device.

Although many methods and devices for separating wastewater from wastewater have been developed and used, they are generally used to dewater water from wastewater using centrifugal force. By rotating, the water was centrifugally discharged through the filter and the oil was caught on the filter to separate the water and oil from the wastewater.

However, the above-described centrifugal separation method and apparatus cannot dissolve oil particles from water particles in the emulsion water because oil is dissolved in water, and only pure oil can be separated from the waste water.

The present invention is to solve the conventional problems as described above and the waste water is mixed with the clean water to rotate the high speed to separate the oil particles from the water particles by centrifugal force and the separated oil floats on the surface of the oil and water separation method and apparatus therefor It will be described in more detail with the accompanying drawings as follows.

1 is an exemplary view showing the overall configuration of the present invention

Figure 2 is an illustration of a rotary cylinder flat cross section of the present invention.

* Explanation of symbols for main parts of the drawings

1: Reservoir

101: oil outlet 102: drain

2: rotating cylinder 201: supply pipe

202: supply hole 203: flooding ball

205: axis of rotation 3,3 ': bulkhead

4,4 ': containment space 401: drain hole

5,6: Oil sensor 7: Drive motor

Waste water in the emulsion state in which oil is dissolved in the reservoir (1) where the clean water is stored to some degree is isolated and supplied to several isolation spaces (4) (4 ') formed in the rotary container (2), and then rotated at a high speed to remove the waste water. The oil particles are separated from the particles by centrifugal force, and the oil particles with light specific gravity are floated to the surface to separate the wastewater into the oil layer and the water layer, and the water separated from the oil particles is discharged to the lower part of the rotary cylinder (2). And the oil particles flood the rotary tube (2) to stay on the clean water surface stored in the reservoir (1), and the pure oil staying on the clean water surface is discharged to the oil outlet 101 of the reservoir (1). This method allows to separate the waste water stream.

Referring to the device for realizing the oil-water separation method as follows.

An oil discharge port 101 is formed at an upper side, and a rotary cylinder 2 is installed in a reservoir 1 in which a drain hole 102 is formed at a bottom thereof, and the rotary shaft 205 is driven below the reservoir 1. It is connected to the motor (7), and the oil sensor (5) (6) is installed in the upper and lower parts of the oil outlet 101 of the reservoir (1), the inside of the rotating cylinder (2) a plurality of partitions (3) (3 ') In order to form a plurality of isolation space (4) (4 ') each having a drain hole (401) in the lower side of the supply pipe 201 in the center of the rotating cylinder (2) facing a plurality of partitions (3) (3') Formed through the supply pipe 201 through the supply hole 202 communicating with each of the isolation space (4) (4 ') on the outer circumferential surface of the supply pipe 201 and formed by forming a plurality of oil flood hole (203) in the upper portion of the rotary tube (2) will be.

According to the present invention, the clean water is stored in the reservoir (1) so as not to flood the rotary cylinder (2), that is, the lower oil detection sense (6) outside the reservoir (1) to the lower portion of the rotary cylinder (2). When the wastewater is supplied to the supply pipe 201 at the center of the rotary tube 2 and then supplied with an emulsion of melted oil, the waste water supplied is separated from the supply pipe 201 by the supply hole 202 of the outer periphery of the supply pipe 201. The waste water exits into spaces 4 and 4 ', respectively, to isolate it.

After supplying the wastewater into the rotary cylinder 2 and rotating the rotary cylinder 2 at high speed, the fine oil particles of the wastewater isolated in the sequestration space 4 and 4 'of the rotary cylinder 2 are respectively rapidly generated from the water particles. Centrifugal separation is performed by the rotating rotating cylinder (2). At this time, fine oil particles having a lighter specific gravity than water particles are formed into oil particles that are large enough to float on the water and float on the water surface to separate the wastewater into the oil layer and the water. .

In this way, when the oil particles are centrifuged from the water particles and float on the surface of the water particles, the separated water particles are discharged to the drain hole 401 formed at the bottom of the isolation space 4, 4 ′ of the rotating cylinder 2. The clean water stored in 1) is drained to the drain hole 102 at the bottom of the reservoir 1 by the amount of water drained to the drain hole 401 so that the surface of the clean water is always maintained and separated and the oil particles floating on the surface The upper part of the rotating cylinder 2 is separated from the waste water which is continuously present in the segregation space of the rotating cylinder 2, that is, the oil particles are separated from the waste water which is continuously supplied to the supply pipe 201 and floated. The overflowing oil flood ball (203) is to stay in the clean water surface of the reservoir (1).

When this operation is repeatedly performed, the oil layer staying on the surface of the clean water stored in the reservoir 1 becomes thicker.

When the thickened oil layer reaches the upper oil sensor (5) outside the reservoir (1), the oil outlet 101 on the other side is opened so that the oil is discharged to the outside. When the sensor 5 is lowered below, the oil outlet 101 is closed, and the rotation of the rotary tube 2 is resumed to separate oil from the wastewater supplied.

Therefore, the present invention, as described above, the oil particles to be separated while centrifuging the oil particles of the waste water in the emulsion state in the water by using the difference in specific gravity to be discharged to float on the water surface to ensure the separation of the waste water oil. In addition, the oil reservoir staying on the surface of the reservoir (1), the upper and lower oil sensor (5) (6) must be included in the oil layer at the same time only the oil outlet 101 is opened so that the oil is discharged to pure There is also the advantage that oil discharge is possible.

Claims (2)

The oil-dissolved emulsion wastewater is segregated into several segregation spaces (4) (4 ') and rotated at high speed to separate the oil particles from the wastewater water particles by centrifugal force. Oil-water separation method that separates wastewater into oil and water by allowing it to surface. An oil outlet 101 is formed on the upper side, and a rotary cylinder 2 is installed in the reservoir 1 in which the drain hole 102 is formed on the bottom thereof, thereby connecting the rotary shaft 205 with the drive motor 7 and storing the reservoir. The oil outlet (1) of the oil outlet 101 is provided with oil detection sensors (5) and (6) on the other side and the inside of the rotating cylinder (2) with a plurality of partitions (3) (3 ') in the lower part of the drain hole (401) respectively. After the branch is formed with a plurality of isolation space (4) (4 ') to form a supply pipe (201) in the center of the rotating cylinder (2) where a plurality of partitions (3) (3') meet, but the outer peripheral surface of the supply pipe (201) The oil and water separation device formed by passing several supply holes 202 communicating with each of the isolation spaces 4 and 4 ', and forming a plurality of oil flooding holes 203 in the upper portion of the rotary cylinder 2.