CN116216846A - Environment-friendly oil-water separator for industrial wastewater purification - Google Patents

Abstract

The invention discloses an environment-friendly oil-water separator for purifying industrial wastewater, which can effectively increase the density difference between wastewater and oil by adopting a mode of rotating the wastewater and a mode of pressurizing the wastewater, so that the oil separation speed is improved, the oil can conveniently and quickly float up to the water surface, the oil-water separation efficiency is improved, the separation effect can be effectively improved by increasing the density difference, the wastewater treatment effect is improved, meanwhile, the equipment is small in size, the occupied space is effectively saved, and the oil in a separation tank can be conveniently and timely discharged by adopting an automatic oil suction and continuous positive pressure oil discharge mode.

Description

An environment-friendly oil-water separator for industrial wastewater purification

technical field

The invention relates to the technical field of environmental protection equipment in emerging strategic industries, in particular to an environment-friendly oil-water separator for industrial wastewater purification.

Background technique

Due to the existence of a large amount of waste oil in industrial wastewater, the treatment process of industrial wastewater needs to include an oil-water separation process, through which the oil and wastewater are separated to facilitate the recycling of the oil and the subsequent separate treatment of the wastewater , in the traditional oil-water separation process, the gravity method is mainly used for separation, that is, by standing the waste water, the oil in the waste water floats to the water surface, so that the oil and water are separated and the oil and water are separated easily. With the continuous development of the industry, this separation method is gradually unable to meet the needs of modern industry for wastewater treatment due to its shortcomings such as slow separation speed, large equipment volume, and incomplete separation. Therefore, in order to solve the above problems, it is urgent to design a new type of oil-water separation equipment.

Contents of the invention

In order to solve the above technical problems, the present invention provides an environment-friendly oil-water separator for industrial wastewater purification.

In order to achieve the above object, the technical scheme adopted in the present invention is:

An environment-friendly oil-water separator for industrial wastewater purification, including a separation box, the separation box is vertical, and the horizontal section of the separation box is rectangular, the outer wall of the separation box is provided with a rotating ring, and the top of the separation box is installed with an air pump and The oil collection tank, the output end of the air pump communicates with the inside of the separation box. There are multiple oil suction holes at the bottom of the oil collection tank. An annular oil-absorbing film is installed between them, and the top of the annular oil-absorbing film is in contact with the bottom surface of the oil collection tank to block the oil suction hole. The side wall of the oil collection tank is connected with an oil collection chamber, and an oil guide pipe is connected with the oil collection chamber. .

More preferably, the supporting ring is provided with a plurality of openings, through which the inner and outer spaces of the annular oil-absorbing membrane can be communicated.

More preferably, a rolling ring is provided on the top of the inner wall of the annular oil-absorbing film, and the rolling ring is used to squeeze the annular oil-absorbing film at the bottom of the oil collection tank, so as to facilitate rapid precipitation of the oil absorbed by the annular oil-absorbing film;

The rolling ring is composed of a plurality of annularly distributed pressure plates, and the multiple pressure plates at the top of the rolling ring are all in contact with the top of the inner wall of the annular oil-absorbing film, so that the center of the multiple pressure plates at the top of the rolling ring is in contact with the support ring The axes coincide, and the centers of the remaining multiple pressure plates are located above the axis of the support ring;

The middle part of the rolling ring is provided with a central shaft, the central shaft is rotatably mounted on the inner wall of the separation box, and the outer wall of the central shaft is annularly provided with a plurality of telescopic rods, and the movable ends of the telescopic rods are rotatably mounted on the inner wall of the pressure plate, and A leaf spring is connected between the movable end and the fixed end of the telescopic rod.

More preferably, the bottom of the inner wall of the oil collection tank is inclined, and the bottom of the oil collection tank is set as a thick-walled layer.

More preferably, a first motor is installed on the outer wall of the separation box, the output end of the first motor is connected to the central shaft, gears are provided on the front and rear sides of the central shaft, and gears are provided on the inner wall of the support ring. , the gear meshes with the teeth on the support ring.

More preferably, it also includes an outer cylinder, the separation box and the rotating ring are located inside the outer cylinder, the rotating ring is rotatably mounted on the inner wall of the outer cylinder, the outer wall of the outer cylinder is provided with a second motor, and the output end of the second motor is driven by a The transmission wheel is located inside the outer cylinder, and the transmission wheel is in transmission contact with the rotating ring.

More preferably, a water guiding cylinder is installed at the bottom of the separation box, and two partitions are arranged in the water guiding cylinder, and the partitions rotate relative to the water guiding cylinder, and the two partitions separate the inner wall of the water guiding cylinder into an upper space and a middle space. The space between the two partitions is the middle space, a fixed plate is arranged between the two partitions, and the bottom of the fixed plate is fixed on the outer cylinder;

The bottom of the outer cylinder is provided with a drain pipe and a water inlet pipe, the drain pipe communicates with the middle space, the water inlet pipe passes through two partitions and communicates with the upper space, and the middle area of the bottom of the inner wall of the separation box is inclined to provide a first water guide pipe, the first water guide pipe It communicates with the upper space, the bottom of the separation box is connected with a second water guide pipe, the second water guide pipe deviates from the vertical axis of the separation box, the second water guide pipe communicates with the middle space, and the middle part of the second water guide pipe passes through the rotating ring and extends to Rotate the top of the ring so that the second aqueduct forms an overflow pipe state.

More preferably, it also includes an auxiliary oil pipe, the auxiliary oil pipe communicates with the oil guide pipe through a joint, and the vertical axis of the joint coincides with the rotation axis of the separation box, the auxiliary oil pipe and the oil guide pipe rotate relatively, and a support plate is fixed on the auxiliary oil pipe. The outer end of the support plate is fixed on the inner wall of the outer cylinder.

Compared with the prior art, the beneficial effect of the present invention is: by forming a high-pressure state inside the separation box, it is convenient to pressurize the waste water inside the separation box, and to form a pressure difference between the separation box and the oil collection tank and automatically discharge the waste water. Oil.

By adopting the method of rotating the waste water and pressurizing the waste water, the density difference between the waste water and the oil can be effectively increased, thereby increasing the oil separation speed, facilitating the oil to quickly float to the water surface, and improving the oil-water separation efficiency , and by increasing the density difference, the separation effect can be effectively improved, thereby improving the wastewater treatment effect. At the same time, the equipment is small in size and can effectively save space. By adopting automatic oil suction and continuous positive pressure oil discharge, it is convenient to make the separation box The oil is discharged in time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the outer cylinder in Fig. 1;

Fig. 3 is the schematic diagram of the cross-sectional structure of the separating box in Fig. 2;

Fig. 4 is a schematic diagram of the enlarged structure of the support ring and the annular oil-absorbing membrane in Fig. 3;

Fig. 5 is a cross-sectional enlarged structural schematic diagram of the oil collecting tank and the rolling ring in Fig. 4;

Marks in the drawings: 1. Separation box; 2. Rotating ring; 3. Air pump; 4. Oil collection tank; 5. Support ring; 6. Annular oil-absorbing film; 10. Central shaft; 11. Telescopic rod; 12. Leaf spring; 13. Oil suction hole; 14. Oil storage tank; 15. Oil guide pipe; 16. First motor; 17. Gear; 18. Outer cylinder; 19. Second Motor; 20, transmission wheel; 21, water guide tube; 22, clapboard; 23, fixed plate; 24, drainage pipe; 25, water inlet pipe; 26, first water guide pipe; 27, second water guide pipe; ; 29, joint; 30, support plate.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

In the description of the present invention, it needs to be explained that, belonging to "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. This example is written in a progressive manner.

As shown in Fig. 1 to Fig. 5, a kind of environment-friendly type industrial wastewater purification oil-water separator of the present invention comprises separation box 1, and described separation box 1 is vertical, and the horizontal section of separation box 1 is rectangular, and separation box 1 A rotating ring 2 is arranged on the outer wall of the separation box 1, and an air pump 3 and an oil collection tank 4 are installed on the top of the separation box 1. 13 communicates with the inside of the separation box 1, and the inner side wall of the separation box 1 is rotated with support rings 5 on the front and rear sides, and an annular oil-absorbing film 6 is installed between the two support rings 5, and the top of the annular oil-absorbing film 6 is in contact with the bottom surface of the oil collection tank 4 And the oil suction hole 13 is blocked, and the side wall of the oil collecting tank 4 is connected with an oil collecting bin 14, and the oil collecting bin 14 is connected with an oil guide pipe 15.

It can be seen that the rotating ring 2 can drive the separation box 1 to rotate, so that the wastewater in the separation box 1 is in a centrifugal state. Due to the difference in density between oil and water, the wastewater moves towards the inner wall of the separation box 1, while the oil moves towards the separation box. The middle part of 1 gathers, and the oil in the middle part of the separation box 1 floats to the water surface through the action of buoyancy, and the separation effect caused by the difference in density of oil and water can be increased through the centrifugal effect of rotation, which facilitates the separation of oil and water, and the separation box is 3-way through the air pump 1 is continuously fed with air, so that the inside of the separation box 1 is in a high-pressure state, and the waste water in the separation box 1 is in a high-pressure state. At this time, the density difference between the waste water and the oil increases proportionally, thereby increasing the value of the waste water and the oil. The density difference of the oil improves the oil-water separation effect. Rotate the support ring 5 and the annular oil-absorbing film 6. The annular oil-absorbing film 6 can absorb the oil in the waste water and on the water surface and carry the oil to rotate. When the oil moves to the bottom of the oil collection tank 4 When the multiple oil suction holes 13 are located, because the inside of the separation box 1 is in a high pressure state, there is a pressure difference between the inside of the separation box 1 and the inside of the oil collection tank 4. Hydraulic pressure enters the oil collection tank 4, so as to achieve the purpose of oil collection tank 4 oil absorption. The oil in the oil collection tank 4 can be discharged through the oil collection tank 14 and the oil guide pipe 15, and the annular oil absorption film 6 that has undergone oil absorption treatment is immersed in the waste water again for oil absorption. Treatment, so as to achieve continuous positive pressure oil discharge work.

By making the cross-section of the separation box 1 rectangular, the separated waste water can be mainly concentrated on the left and right sides of the separation box 1 under the condition that the annular oil-absorbing film 6 is fully in contact with the oil, which facilitates oil-water separation and Wastewater discharge work.

By forming a high-pressure state inside the separation box 1, it is convenient to pressurize the waste water inside the separation box 1, and to form a pressure difference between the separation box 1 and the oil collection tank 4 to automatically discharge oil.

The annular oil-absorbing film 6 is formed by laminating multiple layers of oil films.

By adopting the method of rotating the waste water and pressurizing the waste water, the density difference between the waste water and the oil can be effectively increased, thereby increasing the oil separation speed, facilitating the oil to quickly float to the water surface, and improving the oil-water separation efficiency , and by increasing the density difference, the separation effect can be effectively improved, thereby improving the wastewater treatment effect. At the same time, the equipment is small in size and can effectively save space. By adopting automatic oil suction and continuous positive pressure oil discharge, it is convenient to make the separation box 1 The oil inside is discharged in time.

More preferably, the support ring 5 is provided with a plurality of openings 7 through which the inner and outer spaces of the annular oil-absorbing membrane 6 can be communicated.

It can be seen that by opening a plurality of ports 7, the air inside the separation box 1 can easily enter the inside of the annular oil-absorbing film 6 through the ports 7, thereby generating pressure from bottom to top on the annular oil-absorbing film 6 at the bottom of the oil collection tank 4, and It is convenient for waste water to enter the interior of the annular oil-absorbing membrane 6 through the port 7, and it is convenient for the inner and outer walls of the annular oil-absorbing membrane 6 to carry out adsorption treatment on the oil.

More preferably, the top of the inner wall of the annular oil-absorbing film 6 is provided with a rolling ring 8, and the rolling ring 8 is used to squeeze the annular oil-absorbing film 6 at the bottom of the oil collection tank 4, so that the oil absorbed by the annular oil-absorbing film 6 is conveniently Rapid precipitation;

The rolling ring 8 is composed of a plurality of annularly distributed pressure plates 9, and the multiple pressure plates 9 at the top position of the rolling ring 8 are all in contact with the top of the inner wall of the annular oil-absorbing film 6, so that the multiple pressure plates 9 at the top position of the rolling ring 8 The center of circle of the pressing plate 9 coincides with the axis of the support ring 5, while the centers of circles of the remaining plurality of pressing plates 9 are located above the axis of the support ring 5;

The middle part of the rolling ring 8 is provided with a central shaft 10, the central shaft 10 is rotatably mounted on the inner side wall of the separation box 1, and the outer wall of the central shaft 10 is provided with a plurality of telescopic rods 11 in a ring shape, and the movable ends of the telescopic rods 11 are rotatably mounted. A leaf spring 12 is connected on the inner wall of the pressing plate 9 and between the movable end and the fixed end of the telescopic rod 11 .

It can be seen that the leaf spring 12 can generate elastic thrust to the movable end and the fixed end of the telescopic rod 11, so that the movable end of the telescopic rod 11 can generate an elastic thrust to the pressure plate 9, so that the rolling ring 8 is always in a tight state, and the central axis When 10 rotates, the rolling ring 8 can be driven to rotate synchronously by a plurality of telescopic rods 11. At this time, the top of the rolling ring 8 and the annular oil-absorbing film 6 keep synchronously rotating, so that the top of the rolling ring 8 and the top of the annular oil-absorbing film 6 maintain In a relatively static state, and the top of the rolling ring 8 always produces a pressing force on the top of the annular oil-absorbing film 6, the dynamic extrusion deoiling process of the rolling ring 8 on the annular oil-absorbing film 6 is realized, which facilitates the oil on the annular oil-absorbing film 6 Liquid is separated out rapidly and enters in the oil collecting tank 4.

By adopting the telescopic rod 11 and keeping the multiple pressure plates 9 on the top of the rolling ring 8 in surface contact with the top of the annular oil-absorbing membrane 6, it is convenient for the multiple pressure plates 9 to always carry out surface extrusion and deoiling on the top of the annular oil-absorbing membrane 6 work, to avoid that when the rolling ring 8 is a complete circle, the rolling ring 8 and the annular oil-absorbing film 6 cannot form a surface contact state, and the multiple oil-absorbing holes 13 at the bottom of the oil collecting tank 4 can only realize the air pressure oil absorption to the annular oil-absorbing film 6, while The working effect of extrusion deoiling cannot be realized.

More preferably, the bottom of the inner wall of the oil collection tank 4 is inclined, and the bottom of the oil collection tank 4 is set as a thick-walled layer.

It can be seen that by setting the inner bottom of the oil collection tank 4 to an inclined state, it is convenient for the oil to flow smoothly into the oil collection chamber 14, to facilitate oil collection, and to prevent oil from depositing in the oil collection tank 4. By setting the bottom of the oil collection tank 4 It is a thick-walled layer, which can conveniently provide enough installation space for the oil gathering tank 14 and the oil guide pipe 15, and facilitates the input end of the oil guide tube 15 to absorb oil from the bottom of the oil gathering tank 14.

More preferably, a first motor 16 is installed on the outer wall of the separation box 1, and the output end of the first motor 16 is connected to the central shaft 10 in transmission, and the front and rear sides of the central shaft 10 are provided with gears 17, and the support ring 5 There are teeth on the circumferential inner wall, and the gear 17 meshes with the teeth on the support ring 5 .

It can be seen that the first motor 16 can directly drive the central shaft 10 to rotate, and the central shaft 10 can drive the support ring 5 to rotate through the gear 17, thereby providing power for the annular oil-absorbing film 6 and the rolling ring 8, and it is convenient to make them move synchronously state, it is convenient to keep the contact position between the rolling ring 8 and the annular oil-absorbing film 6 and the top of the annular oil-absorbing film 6 in a relatively static state.

More preferably, it also includes an outer cylinder 18, the separation box 1 and the rotating ring 2 are located inside the outer cylinder 18, the rotating ring 2 is rotatably mounted on the inner wall of the outer cylinder 18, and the outer wall of the outer cylinder 18 is provided with a second motor 19, the second The output end of the second motor 19 is provided with a transmission wheel 20 , the transmission wheel 20 is located inside the outer cylinder 18 , and the transmission wheel 20 is in transmission contact with the rotating ring 2 .

It can be seen that the outer cylinder 18 can support the separation box 1 and the rotating ring 2, and the second motor 19 and the transmission wheel 20 can drive the rotating ring 2 and the separation box 1 to perform circular motion.

More preferably, a water guiding cylinder 21 is installed at the bottom of the separation box 1, and two partitions 22 are arranged in the water guiding cylinder 21, and the partitions 22 and the water guiding cylinder 21 rotate relatively, and the two partitions 22 separate the inner wall of the water guiding cylinder 21 into The upper space and the middle space, wherein the space between the two partitions 22 is the middle space, a fixed plate 23 is arranged between the two partitions 22, and the bottom of the fixed plate 23 is fixed on the outer cylinder 18;

The bottom of the outer cylinder 18 is provided with a drainage pipe 24 and a water inlet pipe 25. The drainage pipe 24 communicates with the middle space, and the water inlet pipe 25 passes through two partitions 22 and communicates with the upper space. The water guide pipe 26, the first water guide pipe 26 communicates with the upper space, the bottom of the separation box 1 communicates with a second water guide pipe 27, the second water guide pipe 27 deviates from the vertical axis of the separation box 1, and the second water guide pipe 27 communicates with the middle space, And the middle part of the second water guide pipe 27 passes through the rotating ring 2 and extends above the rotating ring 2, so that the second water guide pipe 27 forms an overflow pipe state.

It can be seen that external waste water can be introduced into the separation box 1 through the water inlet pipe 25, the upper space and the first aqueduct 26, and the separated waste water near the inner side wall of the separation box 1 can pass through the second aqueduct 27, the middle space and the drain pipe 24 discharge, so as to realize the setting of water in and out, and because the separation box 1 is in a rotating state, the water guide cylinder 21 is driven by the separation box 1 to rotate on the partition plate 22, and the state of water in and out can still be kept stable at this time.

By forming the second aqueduct 27 into an overflow pipe state, when the water level inside the separation box 1 is lower than the highest point on the second aqueduct 27, the inside of the separation box 1 is naturally formed in a high-pressure state, and the overflow can drain.

More preferably, it also includes an auxiliary oil pipe 28, the auxiliary oil pipe 28 communicates with the oil guide pipe 15 through a joint 29, and the vertical axis of the joint 29 coincides with the rotation axis of the separation box 1, and the auxiliary oil pipe 28 and the oil guide pipe 15 rotate relatively, A support plate 30 is fixed on the auxiliary oil pipe 28 , and the outer end of the support plate 30 is fixed on the inner wall of the outer cylinder 18 .

It can be seen that by adopting the structure of the auxiliary oil pipe 28, the joint 29 and the support plate 30, it can be ensured that the separation box 1 drives the oil guide pipe 15 to rotate and at the same time realizes the smooth flow of the oil passage.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (8)

1. The utility model provides an environment-friendly industrial waste water purifies uses oil-water separator, a serial communication port, including separator box (1), separator box (1) is vertical, and the horizontal cross-section of separator box (1) is the rectangle, be provided with swivel ring (2) on the outer wall of separator box (1), air pump (3) and oil collecting tank (4) are installed at the top of separator box (1), a plurality of oil-absorbing holes (13) have been seted up to the output of air pump (3) and the inside intercommunication of separator box (1) in oil collecting tank (4), oil-absorbing holes (13) and separator box (1) internal communication, both sides all rotate around separator box (1) inside wall are provided with holding ring (5), install annular oil-absorbing film (6) between two holding rings (5), the top and oil collecting tank (4) bottom surface contact and to oil-absorbing hole (13) shutoff, the intercommunication is equipped with on the lateral wall of oil collecting tank (4) and gathers oil storehouse (14), the intercommunication is equipped with oil guide pipe (15).

2. The environment-friendly oil-water separator for industrial wastewater purification according to claim 1, wherein the support ring (5) is provided with a plurality of through holes (7), and the inner space and the outer space of the annular oil-absorbing film (6) can be communicated through the through holes (7).

3. The environment-friendly oil-water separator for industrial wastewater purification according to claim 2, wherein a rolling ring (8) is arranged at the top of the inner wall of the annular oil-absorbing film (6), and the rolling ring (8) is used for extruding the annular oil-absorbing film (6) at the bottom of the oil collecting tank (4), so that oil absorbed by the annular oil-absorbing film (6) can be conveniently and rapidly separated out;

the rolling ring (8) is composed of a plurality of pressing plates (9) which are annularly distributed, the pressing plates (9) at the top position of the rolling ring (8) are in contact with the top of the inner wall of the annular oil absorbing film (6), so that the circle centers of the pressing plates (9) at the top position of the rolling ring (8) are coincident with the axis of the supporting ring (5), and the circle centers of the remaining pressing plates (9) are located above the axis of the supporting ring (5);

the middle part of the rolling ring (8) is provided with a center shaft (10), the center shaft (10) is rotatably mounted on the inner side wall of the separation box (1), a plurality of telescopic rods (11) are annularly arranged on the outer wall of the center shaft (10), the movable ends of the telescopic rods (11) are rotatably mounted on the inner wall of the pressing plate (9), and leaf springs (12) are connected between the movable ends and the fixed ends of the telescopic rods (11).

4. An environment-friendly industrial wastewater purifying oil-water separator according to claim 3, wherein the bottom of the inner wall of the oil collecting tank (4) is inclined, and the bottom of the oil collecting tank (4) is provided with a thick-wall layer.

5. The environment-friendly oil-water separator for industrial wastewater purification according to claim 4, wherein the outer wall of the separation tank (1) is provided with a first motor (16), the output end of the first motor (16) is in transmission connection with the central shaft (10), gears (17) are arranged on the front side and the rear side of the central shaft (10), teeth are arranged on the inner circumferential wall of the support ring (5), and the gears (17) are meshed with the teeth on the support ring (5).

6. The environment-friendly oil-water separator for industrial wastewater purification according to claim 5, further comprising an outer cylinder (18), wherein the separation tank (1) and the rotary ring (2) are both positioned on the inner side of the outer cylinder (18), the rotary ring (2) is rotatably mounted on the inner wall of the outer cylinder (18), a second motor (19) is arranged on the outer wall of the outer cylinder (18), a driving wheel (20) is arranged at the output end of the second motor (19) in a transmission manner, the driving wheel (20) is positioned on the inner side of the outer cylinder (18), and the driving wheel (20) is in transmission contact with the rotary ring (2).

7. The environment-friendly oil-water separator for industrial wastewater purification according to claim 6, wherein the bottom of the separation tank (1) is provided with a water guide cylinder (21), two partition plates (22) are arranged in the water guide cylinder (21), the partition plates (22) rotate relative to the water guide cylinder (21), the two partition plates (22) divide the inner wall of the water guide cylinder (21) into an upper layer space and a middle layer space, the space between the two partition plates (22) is the middle layer space, a fixing plate (23) is arranged between the two partition plates (22), and the bottom of the fixing plate (23) is fixed on the outer cylinder (18);

the urceolus (18) bottom is equipped with drain pipe (24) and inlet tube (25), drain pipe (24) and middle level space intercommunication, inlet tube (25) pass two baffles (22) and communicate with the upper space, separation case (1) inner wall bottom intermediate zone slope is equipped with first aqueduct (26), first aqueduct (26) communicate with the upper space, separation case (1) bottom intercommunication is equipped with second aqueduct (27), second aqueduct (27) skew separation case (1) vertical axis, second aqueduct (27) communicate with the middle level space, and the middle part of second aqueduct (27) passes swivel ring (2) and stretches to the top of swivel ring (2), thereby make second aqueduct (27) form overflow pipe state.

8. The oil-water separator for purifying industrial wastewater according to claim 7, further comprising an auxiliary oil pipe (28), wherein the auxiliary oil pipe (28) is communicated with the oil guide pipe (15) through a joint (29), the vertical axis of the joint (29) coincides with the rotation axis of the separation tank (1), the auxiliary oil pipe (28) rotates relative to the oil guide pipe (15), a support plate (30) is fixed on the auxiliary oil pipe (28), and the outer end of the support plate (30) is fixed on the inner wall of the outer cylinder (18).

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