CN113546448B

CN113546448B - Oil-water separator

Info

Publication number: CN113546448B
Application number: CN202010337343.2A
Authority: CN
Inventors: 原红超; 贾慧敏; 吴春升; 吴定泉; 霸振; 赵登刚; 闻伟; 樊彬; 徐小强; 李鹏鹏; 赵金利
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2023-04-25
Anticipated expiration: 2040-04-26
Also published as: CN113546448A

Abstract

The disclosure provides an oil-water separation device, which belongs to the field of oil-water separation. The oil-water separation device comprises a separation box, a liquid inlet pipe, a drain pipe, an oil collecting pipe, a deep drain pipe and an oil collecting box, wherein the liquid inlet pipe, the drain pipe and the oil drain pipe are all arranged on the side wall of the separation box, the oil collecting pipe is horizontally arranged in the separation box and communicated with the oil drain pipe, a plurality of oil collecting holes are formed in the pipe wall of the oil collecting pipe, the deep drain pipe is positioned in the separation box, the deep drain pipe is communicated with the drain pipe, the oil collecting box is positioned outside the separation box and communicated with the oil drain pipe, and oil floating on the water surface can enter the oil collecting pipe through the plurality of oil collecting holes on the oil collecting pipe, the oil entering the oil collecting pipe enters the oil collecting box through the oil drain pipe, the oil-water mixture generated by mechanical equipment can be directly separated, the oil-water mixture is not required to be intensively transported to a sewage treatment plant for centralized treatment, and the treatment cost of the oil-water mixture is reduced.

Description

Oil-water separator

Technical Field

The disclosure relates to the field of oil-water separation, in particular to an oil-water separation device.

Background

The water may act as a cooling in the machine and may also have a degree of lubrication. For example, in the exploitation of coal-bed gas, a plunger pump is typically used to power downhole equipment, and the plunger pump requires continuous cooling and lubrication with water during operation.

Since water is primarily still cooling and lubrication is limited, lubricating oil is also commonly used in mechanical devices. The water carries away part of the lubricating oil during circulation, which causes the mechanical equipment to produce a large amount of oil-water mixture during operation.

The direct discharge of the oil-water mixture causes environmental pollution, so that the oil-water mixture is generally transported to a sewage treatment plant in a centralized way at present and then is treated in a centralized way by the sewage treatment plant, and the cost is high.

Disclosure of Invention

The embodiment of the disclosure provides an oil-water separation device, which can facilitate the separation of an oil-water mixture and reduce the treatment cost of the oil-water mixture. The technical scheme is as follows:

the embodiment of the disclosure provides an oil-water separation device, which comprises a separation tank, a liquid inlet pipe, a water outlet pipe, an oil collecting pipe, a deep water drainage pipe and an oil collecting box, wherein the liquid inlet pipe, the water outlet pipe and the oil outlet pipe are all arranged on the side wall of the separation tank, one end of the liquid inlet pipe is positioned in the separation tank, the other end of the liquid inlet pipe is positioned outside the separation tank, one end of the water outlet pipe is positioned in the separation tank, the other end of the water outlet pipe is positioned outside the separation tank, one end of the oil outlet pipe is positioned in the separation tank, the other end of the oil collecting pipe is positioned outside the separation tank, the oil collecting pipe is horizontally arranged in the separation tank, the oil collecting pipe is communicated with the oil outlet pipe, the oil collecting pipe is not lower than the water outlet pipe in the vertical direction, the deep water outlet pipe is positioned in the separation tank, and the oil collecting box is communicated with the bottom surface of the water outlet pipe, and the oil collecting box is positioned at an acute angle.

Optionally, the other end of the deep drainage pipe is higher than the oil collecting pipe, the middle part of the deep drainage pipe is communicated with the drain pipe, the oil-water separation device further comprises a water level adjusting block, the water level adjusting block is movably arranged in the deep drainage pipe along the axial direction of the deep drainage pipe, the water level adjusting block is in sealing fit with the pipe wall of the deep drainage pipe, and a drainage through hole which is communicated with the drain pipe and is lower than one end of the drain pipe of the deep drainage pipe is formed in the water level adjusting block.

Optionally, the water level adjusting block is in threaded connection with the inner wall of the drainage deep pipe.

Optionally, a groove for matching with a screwdriver is formed on the surface of the water level regulating block, which is close to the other end of the drainage deep pipe.

Optionally, one end of the oil drain pipe located in the separation box is communicated with a pipe joint, the oil collecting pipe is rotatably connected with the pipe joint, and a rotating shaft of the oil collecting pipe is coincident with an axis of the oil collecting pipe.

Optionally, the pipe joint is a three-way joint, the oil-water separation device comprises two oil collecting pipes, and one ends of the two oil collecting pipes are respectively communicated with the three-way joint.

Optionally, the oil-water separation device comprises a plurality of oil collecting pipes, and the oil collecting holes of the oil collecting pipes of different types have different diameters.

Optionally, the middle part of the oil collecting pipe is communicated with the oil discharging pipe.

Optionally, two ends of the oil collecting pipe are closed.

Optionally, a first oil drain valve is arranged on the side wall of the oil collecting box.

Optionally, in the vertical direction, an end of the oil drain pipe located inside the separation tank is not lower than an end of the oil drain pipe located outside the separation tank.

Optionally, one end of the oil drain pipe located outside the separation tank is connected with a second oil drain valve.

Optionally, the separation tank has a first side wall and a second side wall opposite to each other, the liquid inlet pipe is located on the first side wall, and the water outlet pipe is located on the second side wall.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:

through setting up separator box and feed liquor pipe, the one end of feed liquor pipe is located the separator box, and the other end is located the separator box to can pour into the oil water mixture into the separator box through the feed liquor pipe. When the oil-water mixture is separated, oil floats on the water surface, one end of the drain pipe is positioned in the separation box, the other end of the drain pipe is positioned outside the separation box, the drain deep pipe is positioned in the separation box and communicated with the drain pipe, one end of the drain deep pipe is lower than the drain pipe, one end of the drain deep pipe can be inserted under the water surface, water in the separation box is discharged, and the water surface height is controlled. Through setting up oil drain pipe and oil collecting pipe, because oil collecting pipe is not less than drain pipe and oil drain pipe in vertical direction, float the oil on the surface of water can enter into oil collecting pipe through a plurality of oil collecting holes on the oil collecting pipe, oil collecting pipe again with arrange oil pipe and oil collecting box intercommunication, because oil in the oil collecting box is less than oil drain pipe, oil that enters into oil collecting pipe can enter into the oil collecting box through oil drain pipe discharge separator box, collect the exhaust oil through the oil collecting box, because the bottom surface of oil collecting box becomes the contained angle with oil collecting pipe's axis and is the acute angle, oil can collect in the oil collecting box to separate the oil water mixture into oil and water. The device is simple, can directly separate the oily water mixture that mechanical equipment produced, no longer need concentrate the transportation to sewage treatment plant with oily water mixture and carry out centralized processing, reduced oily water mixture's processing cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural diagram of an oil-water separator according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an oil-water separator according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an oil-water separator according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an oil-water separator according to an embodiment of the present disclosure;

fig. 5 is a schematic partial structure of an oil-water separator according to an embodiment of the present disclosure;

FIG. 6 is a top view of an oil-water separator provided in an embodiment of the present disclosure;

fig. 7 is a schematic structural view of a water level adjustment block according to an embodiment of the present disclosure;

fig. 8 is a schematic cross-sectional view of another water level adjustment block provided by an embodiment of the present disclosure.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an oil-water separator according to an embodiment of the present disclosure. As shown in fig. 1, the oil-water separation device includes a separation tank 10, a liquid inlet pipe 20, a water outlet pipe 30, an oil outlet pipe 40, an oil collecting pipe 50, a water outlet deep pipe 60, and an oil collecting box 70. For ease of illustration of the construction, part of the side walls of the separator box 10 are omitted from fig. 1.

The liquid inlet pipe 20, the water outlet pipe 30 and the oil outlet pipe 40 are all arranged on the side wall of the separation box 10, one end of the liquid inlet pipe 20 is positioned in the separation box 10, and the other end of the liquid inlet pipe 20 is positioned outside the separation box 10; one end of the drain pipe 30 is positioned in the separation tank 10, and the other end of the drain pipe 30 is positioned outside the separation tank 10; one end of the oil drain pipe 40 is located inside the separation tank 10, and the other end of the oil drain pipe 40 is located outside the separation tank 10.

The oil collecting pipe 50 is horizontally arranged in the separation tank 10, the oil collecting pipe 50 is communicated with the oil drain pipe 40, the oil collecting pipe 50 is not lower than the water drain pipe 30 and the oil drain pipe 40 in the vertical direction, and a plurality of oil collecting holes 50a are formed in the pipe wall of the oil collecting pipe 50. The drain flooding pipe 60 is located in the separation tank 10, the drain flooding pipe 60 is communicated with the drain pipe 30, and one end of the drain flooding pipe 60 is lower than the drain pipe 30.

The oil collecting case 70 is located outside the separation case 10 and communicates with the oil drain pipe 40, and the bottom surface of the oil collecting case 70 is lower than the oil drain pipe 40.

Fig. 2 is a schematic structural diagram of an oil-water separator according to an embodiment of the present disclosure. As shown in fig. 2, the bottom surface of the oil collecting box 70 forms an acute angle with the axis of the oil collecting pipe 50.

Alternatively, the separator tank 10 may be a tank structure. In the present embodiment, the separation tank 10 may have a rectangular parallelepiped shape. The separator tank 10 may have a length of 4m, a width of 3m, and a height of 3m. The specific size of the separation tank 10 may be set according to the amount of the oil-water mixture to be treated, and if the amount of the oil-water mixture is large, the volume of the separation tank 10 may be set large, otherwise, may be set small. In other possible implementations, the separator tank 10 may also be other shapes, such as a cylinder. By way of example, the separator tank 10 may be of steel construction, plastic construction, or glass construction.

As shown in fig. 1, the separator tank 10 may have opposite first and

second sidewalls

11 and 12, the inlet pipe 20 being located on the first sidewall 11, and the outlet pipe 30 being located on the second sidewall 12. The liquid inlet pipe 20 and the water outlet pipe 30 are arranged on two opposite side walls, so that the liquid inlet pipe 20 and the water outlet pipe 30 are far apart, and the mixture of the oil and water entering the separation tank 10 from the liquid inlet pipe 20 can have enough time to be layered, so that a water layer and an oil layer are formed. The separator tank 10 may further include third and

fourth sidewalls

13 and 14 connecting the first and

second sidewalls

11 and 12.

Optionally, the separation tank 10 may further include an openable cover (not shown) opposite the bottom surface of the separation tank 10, and the cover may be coupled to at least one of the third and

fourth sidewalls

13 and 14 of the first and

second sidewalls

11 and 12 to seal the separation tank 10. Avoid debris to drop separator box 10, can also avoid the peculiar smell diffusion that the oil water mixture probably had simultaneously to because the case lid can open and shut, can conveniently wash separator box 10.

Illustratively, the lid may be hinged to one of the third and

fourth sidewalls

13, 14 of the first and

second sidewalls

11, 12 such that the lid may be flipped over to open or close the lid. The case lid can be connected on third lateral wall 13, because feed liquor pipe 20 is located on first lateral wall 11, and drain pipe 30 is located on second lateral wall 12, and oil drain pipe 40 is located on fourth lateral wall 14, consequently connect the case lid on third lateral wall 13, the case lid is difficult to collide with oil water separator's other structures when the upset, more is convenient for operate.

Optionally, a filter screen (not shown) may be further disposed in the separation tank 10, and the filter screen may be connected to the first side wall 11, the second side wall 12, and the bottom of the separation tank 10, where the oil collecting pipe 50 and the liquid inlet pipe 20 are respectively located at two sides of the filter screen, and the oil collecting pipe 50 and the liquid inlet pipe 20 are separated by the filter screen, so that impurities possibly existing in the oil-water mixture may be prevented from blocking the oil collecting hole 50a of the oil collecting pipe 50.

The oil collecting case 70 may be a case structure. In the present embodiment, the oil collecting case 70 may have a rectangular parallelepiped shape. The oil collecting case 70 may have a length of 0.4m, a width of 0.3m, and a height of 0.1m. The specific size of the oil collecting box 70 can be set according to the amount of the oil-water mixture to be treated and the content of oil, the amount of the oil-water mixture is larger, the oil content is higher, the volume of the oil collecting box 70 can be set larger, and conversely, the volume of the oil collecting box 70 can be set smaller. In other possible implementations, the oil collection cartridge 70 may also be other shapes, such as a cylinder. As an example, the oil collecting case 70 may have a steel structure, a plastic structure, or a glass structure.

The oil collecting box 70 may also have an openable box cover (not shown), which can seal the oil collecting box 70 to prevent oil from leaking, and can also prevent peculiar smell from diffusing, and the openable box cover also facilitates cleaning of the oil collecting box 70.

Illustratively, the lid may be hinged to the side wall of the oil collection case 70 by a hinge.

The oil collecting box 70 may be welded to the oil drain pipe 40 or may be detachably connected.

Illustratively, the oil drain pipe 40 may be threadably connected to the sidewall of the oil collecting box 70, such that the oil drain pipe 40 and the oil collecting box 70 may be disassembled to facilitate cleaning or maintenance and replacement of the oil collecting box 70. And the oil collecting box 70 can be screwed, so that the inclination angle of the bottom surface of the oil collecting box 70 can be adjusted, and the collection of oil is facilitated.

Fig. 3 is a schematic structural diagram of an oil-water separator according to an embodiment of the disclosure. As shown in fig. 3, a first oil discharge valve 71 may be further provided on a sidewall of the oil collecting case 70. The oil in the oil collecting case 70 can be conveniently discharged by providing the first oil discharge valve 71.

Illustratively, the first oil discharge valve 71 may be a ball valve.

The first oil discharge valve 71 may be located at the lowest position of the oil collection case 70. To facilitate the collection of oil to the first oil discharge valve 71.

Alternatively, the bottom surface of the oil collection box 70 may form an angle of 15 ° to 20 ° with the axis of the oil collection pipe 50. When the oil-water separation device is used, the oil collecting pipe 50 is positioned at the horizontal plane, the bottom surface of the oil collecting box 70 is inclined by 15-20 degrees relative to the horizontal plane, and oil is conveniently collected to the first oil discharge valve 71. Too small an included angle is unfavorable for the flow of oil.

Fig. 4 is a schematic structural diagram of an oil-water separator according to an embodiment of the present disclosure. In fig. 4, a represents the water surface, and B represents the oil surface. As shown in fig. 4, the end of the feed pipe 20 located in the separation tank 10 may be higher than the drain pipe 30 in the vertical direction. Because the water surface height in the separation tank 10 is limited by the drain pipe 30, the water surface can not exceed the drain pipe 30, and the thickness of the oil layer is added, so that the oil surface can exceed the drain pipe 30, and the end of the liquid inlet pipe 20 positioned in the separation tank 10 is higher than the drain pipe 30, thereby being beneficial to avoiding the oil layer from blocking the pipe orifice of the liquid inlet pipe 20.

The inlet pipe 20 may be located at the upper part of the separation tank 10, for example, the separation tank 10 has a height of 3m, and the inlet pipe 20 is located at a height H from the bottom of the separation tank 10 ₁ May be 2.8m.

The distance between the port of the liquid inlet pipe 20 at one end in the separation tank 10 and the first side wall 11 can be 3 cm-5 cm, so that disturbance of injection of the oil-water mixture to the liquid in the separation tank 10 can be reduced as much as possible, and rapid layering of the oil-water mixture is facilitated.

The end of the feed pipe 20 located in the separation tank 10 may be located at a corner of the separation tank 10, i.e. the end of the feed pipe 20 located in the separation tank 10 is located close to the first side wall 11 and the third side wall 13, which can further reduce disturbance of the liquid in the separation tank 10.

As shown in fig. 4, the end of the liquid inlet pipe 20 located in the separation tank 10 may further have an elbow 21, and the outlet of the elbow 21 is vertically downward, so as to further reduce disturbance to the liquid in the separation tank 10.

Fig. 5 is a schematic partial structure of an oil-water separator according to an embodiment of the present disclosure. As shown in fig. 5, one end of the oil drain pipe 40 located inside the separator tank 10 is not lower than one end of the oil drain pipe 40 located outside the separator tank 10 in the vertical direction. This may facilitate draining of oil from the oil header 50 through the oil drain 40. Illustratively, the axis of the oil drain pipe 40 may be at an angle of 15 to 20 with respect to the horizontal. In this embodiment, the axis of the oil drain pipe 40 is at an angle of 17.5 ° to the horizontal.

Alternatively, a second oil discharge valve 41 may be connected to one end of the oil discharge pipe 40 located outside the separator tank 10. At the time of oil-water separation, the second oil discharge valve 41 may be opened to discharge oil into the oil collecting case 70. When the oil collecting box 70 is full of oil, or when the oil collecting box 70 is cleaned, the second oil discharge valve 41 may be closed, so that the oil temporarily stops entering the oil collecting box 70.

The second oil discharge valve 41 may be a ball valve, for example.

The length of the oil drain pipe 40 may be 40mm to facilitate the arrangement of the second oil drain valve 41 and the operation of the second oil drain valve 41.

Fig. 6 is a top view of an oil-water separator according to an embodiment of the present disclosure. As shown in fig. 6, one end of the oil drain pipe 40 located in the separator tank 10 may be connected to a pipe joint 80, the oil collecting pipe 50 is rotatably connected to the pipe joint 80, and a rotation axis of the oil collecting pipe 50 coincides with an axis of the oil collecting pipe 50. When the oil-water mixture is treated, the oil and water in the separation tank 10 are not compatible, the oil and water are layered, the oil density is smaller than that of the water, the oil layer floats on the water layer, and the oil collecting hole 50a can be submerged in the oil layer by rotating the oil collecting pipe 50, so that only the oil can smoothly enter the oil collecting pipe 50. The oil collecting hole 50a may be lower than the liquid inlet pipe 20 to prevent the oil layer from blocking the liquid inlet pipe 20, and the oil collecting hole 50a may be further located at the bottom of the oil layer to drain all oil out of the separation tank 10 as much as possible.

Illustratively, the height H of the header 50 from the bottom of the separator tank 10 ₂ May be 2.75m, and the height H of the liquid inlet pipe 20 from the bottom of the separation tank 10 ₁ At 2.8m, the height of the oil collecting pipe 50 from the bottom of the separation tank 10 is slightly lower than the height of the liquid inlet pipe 20 from the bottom of the separation tank 10.

In one possible implementation of the present disclosure, one end of the oil header 50 may be in communication with the oil drain 40. In another possible implementation of the present disclosure, a middle portion of the oil header 50 may be in communication with the oil drain 40. The middle part of the oil collecting pipe 50 is communicated with the oil discharging pipe 40, so that the oil in the oil collecting pipe 50 can flow into the oil discharging pipe 40 more quickly, and the oil discharging speed is improved.

The oil collecting hole 50a of the oil collecting pipe 50 may be a passage of the oil collecting pipe 50 that communicates only with the separator tank 10 and the oil collecting pipe 50. If one end of the oil collecting pipe 50 communicates with the oil drain pipe 40, the other end of the oil collecting pipe 50 may be closed. If the middle of the oil collecting pipe 50 is communicated with the oil drain pipe 40, both ends of the oil collecting pipe 50 may be closed. Since the end of the oil collecting pipe 50 is closed, it is possible to prevent water from entering the oil collecting pipe 50 from the end of the oil collecting pipe 50 when the water level in the separator tank 10 is excessively high.

Illustratively, the end of the header 50 may be provided with a plug 90 to close the end of the header 50.

As shown in fig. 6, the pipe joint 80 may be a three-way joint, and the oil-water separation device may include two oil collecting pipes 50, and one ends of the two oil collecting pipes 50 are respectively communicated with the three-way joint. Thus, by providing two oil collecting pipes 50, the processing speed of the oil-water mixture can be increased. The ends of the two oil collecting pipes 50, which are not connected to the pipe joints 80, may be provided with plugs 90 to plug the ends of the oil collecting pipes 50.

The oil collecting pipe 50 and the pipe joint 80 can be connected through the lock nut 81, so that the oil collecting pipe 50 can be rotated after the lock nut 81 is unscrewed, and the rotation of the oil collecting pipe 50 is facilitated.

A sealing gasket can be clamped between the oil collecting pipe 50 and the pipe joint 80 to improve the sealing performance and avoid leakage.

The oil collecting pipe 50 can be arranged close to the fourth side wall 14, so that the oil collecting pipe 50 is far away from the liquid inlet pipe 20, disturbance of oil liquid near the oil collecting pipe 50 in the process of injecting the oil-water mixture can be reduced, and separation of the oil liquid is facilitated. Illustratively, the spacing D between the manifold 50 and the inlet pipe 20 is in a direction perpendicular to the axis of the manifold 50 in a horizontal plane ₁ May be 2.8m.

The plurality of oil collecting holes 50a may be equidistantly spaced along the axis of the oil collecting pipe 50. So as to facilitate the discharge of oil. As an example, the length of both oil collecting pipes 50 may be 1.5m, and the interval between adjacent oil collecting holes 50a may be 10cm.

Alternatively, the diameter of the oil collecting hole 50a may be 3mm to 5mm, and the oil collecting hole 50a may be too small to be easily blocked, and the oil collecting hole 50a may be too large in diameter to easily flow water into the oil collecting pipe 50. For an oil-water mixture with a higher oil content, the oil layer is thicker, the diameter of the oil collecting hole 50a may be set larger so as to facilitate oil discharge, and for an oil-water mixture with a lower oil content, the oil layer is thinner, the diameter of the oil collecting hole 50a may be set smaller. Illustratively, in the present embodiment, the diameter of the oil collecting hole 50a is 4mm.

Optionally, the oil-water separation device may include various oil collecting pipes 50, and the oil collecting holes 50a of different oil collecting pipes 50 have different diameters, so that an appropriate oil collecting pipe 50 can be selected according to the content of oil in the oil-water mixture to be treated, thereby improving the oil-water separation efficiency.

In this embodiment, the height of the drain pipe 30 and the bottom of the separator tank 10 may be 2.75m, and not more than the height of the oil collecting pipe 50 from the bottom of the separator tank 10, so that the water level is lower than the oil collecting pipe 50. The height of the drain pipe 30 and the bottom of the separator tank 10 may also be slightly smaller than the height of the oil collecting pipe 50 from the bottom of the separator tank 10, for example, 2.74m.

Distance D between drain pipe 30 and fourth sidewall 14 ₂ The drain pipe 30 is far away from the oil collecting pipe 50, which can be 2.5m, and the disturbance to the oil in the water discharging process can be further reduced. The length of the drain pipe 30 may be 20cm.

Alternatively, the drain pipe 60 and the drain pipe 30 may be welded together for ease of manufacture.

Distance H from bottom of separation tank 10 at bottom end of drain deep pipe 60 ₃ The depth of the drain pipe 60 may be 0.2m, and the disturbance to the oil layer may be reduced when water is drained from the drain pipe 60 into the drain pipe 30.

Referring to fig. 4, one end of the drain pipe 60 is lower than the drain pipe 30, the other end of the drain pipe 60 may be higher than the oil collecting pipe 50, and the middle of the drain pipe 60 communicates with the drain pipe 30. The total liquid level in the separator tank 10 is generally not higher than the oil collecting pipe 50, and the other end of the drain deep pipe 60 is arranged higher than the oil collecting pipe 50, so that oil is prevented from entering the oil collecting pipe from the upper end of the drain deep pipe 60.

The oil-water separation device may further include a water level adjusting block 61, wherein the water level adjusting block 61 is movably installed in the deep drain pipe 60 along an axial direction of the deep drain pipe 60, the water level adjusting block 61 is in sealing fit with a pipe wall of the deep drain pipe 60, and the water level adjusting block 61 is provided with a drain through hole 61a communicating the drain pipe 30 with one end of the deep drain pipe 60 lower than the drain pipe 30.

Since the water level adjusting block 61 can move in the drain deep pipe 60, the water level in the separation tank 10 can be adjusted by adjusting the position of the water level adjusting block 61, so that the water level in the separation tank 10 is maintained below the oil collecting hole 50a, and smooth separation of oil and water is ensured.

Illustratively, when the drain through hole 61a is flush with the lowest position of the drain pipe 30, or the drain through hole 61a is located below the lowest position of the drain pipe 30, the water level in the separation tank 10 may be controlled at the lowest position of the drain pipe 30. If the opening of one end of the drain through hole 61a does not exceed the lowest position of the drain pipe 30, and the opening of the other end of the drain through hole 61a is located above the lowest position of the drain pipe 30, the water level in the separation tank 10 can enter the drain pipe 30 only when reaching at least the opening of the other end of the drain through hole 61a. The water level adjustment block 61 may have a cylindrical shape and a length of 30mm.

Alternatively, the water level adjustment block 61 may be screw-coupled with the inner wall of the drain pipe 60. Thus, the water level regulating block 61 can be screwed to regulate the position of the water level regulating block in the deep drain pipe 60, and the threaded connection also has better sealing performance, so that the water level regulating block 61 is in sealing fit with the pipe wall of the deep drain pipe 60.

Fig. 7 is a schematic structural view of a water level adjusting block according to an embodiment of the present disclosure. As shown in fig. 7, the water level adjusting block 61 may have a groove 61b on a surface near the upper end of the drain pipe 60 for cooperation with a screw driver. Thus, the water level adjusting block 61 can be screwed from the upper end of the drain pipe 60 by a screwdriver, and the position of the water level adjusting block 61 can be adjusted.

As shown in fig. 7, an end opening of the drain through hole 61a for communicating with the drain pipe 30 may be located on the top surface of the water level adjustment block 61.

Fig. 8 is a schematic cross-sectional view of another water level adjustment block provided by an embodiment of the present disclosure. As shown in fig. 8, an end opening of the drain through hole 61a for communicating with the drain pipe 30 may also be located on a side surface of the water level adjustment block 61. If one end opening of the drain through hole 61a for communicating with the drain pipe 30 is located on the side of the water level adjustment block 61, the water level adjustment block 61 is screwed at least once, and the number of screwing turns is an integer, so as to ensure that the drain through hole 61a can communicate with the drain pipe 30 after the water level adjustment block 61 is screwed.

As an example, the feed pipe 20, the drain pipe 30, the drain pipe 40, the collector pipe 50, and the drain flooding pipe 60 may each be 6 branches. The 6-branch pipe is a common specification pipeline, and the inner diameter of the pipeline is 20mm. In other possible implementations, other sizes of pipes are also possible. The liquid inlet pipe 20, the water outlet pipe 30 and the oil outlet pipe 40 can be welded on the separation tank 10.

The foregoing description of the preferred embodiments of the present disclosure is not intended to limit the disclosure, but rather to enable any modification, equivalent replacement, improvement or the like, which fall within the spirit and principles of the present disclosure.

Claims

1. An oil-water separation device is characterized by comprising a separation tank (10), a liquid inlet pipe (20), a water outlet pipe (30), an oil outlet pipe (40), an oil collecting pipe (50), a water outlet deep pipe (60) and an oil collecting box (70), wherein the liquid inlet pipe (20), the water outlet pipe (30) and the oil outlet pipe (40) are all arranged on the side wall of the separation tank (10), one end of the liquid inlet pipe (20) is positioned in the separation tank (10), the other end of the liquid inlet pipe (20) is positioned outside the separation tank (10), one end of the water outlet pipe (30) is positioned in the separation tank (10), the other end of the oil outlet pipe (40) is positioned outside the separation tank (10), the oil collecting pipe (50) is horizontally arranged in the separation tank (10), the oil collecting pipe (50) is communicated with the water outlet pipe (30) in the direction of the water outlet pipe (40) and is not communicated with the water outlet pipe (50 a) in the water outlet pipe (50 a) which is positioned outside the separation tank (50), the middle part of the deep drain pipe (60) is communicated with the drain pipe (30), one end of the deep drain pipe (60) is lower than the drain pipe (30), the other end of the deep drain pipe (60) is opened and higher than the oil collecting pipe (50), the oil collecting box (70) is positioned outside the separation tank (10) and communicated with the oil drain pipe (40), the bottom surface of the oil collecting box (70) is lower than the oil drain pipe (40), an included angle formed by the bottom surface of the oil collecting box (70) and the axis of the oil collecting pipe (50) is an acute angle, the oil-water separation device further comprises a water level regulating block (61), the water level regulating block (61) is movably arranged in the deep drain pipe (60) along the axial direction of the deep drain pipe (60), the water level regulating block (61) is in sealing fit with the pipe wall of the deep drain pipe (60), a water level regulating block (61) is provided with a through hole (61 a), the water level regulating block (61 a) is positioned at the water level regulating block (61 a) at one end of the deep drain pipe (30) or the water drain pipe (30) and is communicated with the water level regulating block (61 a) at the water level regulating block (61 a) side surface (30), the top surface of the water level adjusting block (61) is provided with a groove (61 b) for being matched with a screw driver.

2. The oil-water separation device according to claim 1, wherein one end of the oil drain pipe (40) located in the separation tank (10) is communicated with a pipe joint (80), the oil collecting pipe (50) is rotatably connected with the pipe joint (80), and the rotating shaft of the oil collecting pipe (50) is coincident with the axis of the oil collecting pipe (50).

3. The oil-water separation device according to claim 2, wherein the pipe joint (80) is a three-way joint, the oil-water separation device comprises two oil collecting pipes (50), and one ends of the two oil collecting pipes (50) are respectively communicated with the three-way joint.

4. An oil-water separator according to claim 3, characterized in that the oil-water separator comprises a plurality of oil collecting pipes (50), and the oil collecting holes (50 a) of different kinds of the oil collecting pipes (50) are different in diameter.

5. The oil-water separation device according to claim 1, characterized in that the middle part of the oil collecting pipe (50) is communicated with the oil discharging pipe (40).

6. The oil-water separator according to claim 5, characterized in that both ends of the oil collecting pipe (50) are closed.

7. The oil-water separation device according to claim 1, characterized in that a first oil drain valve (71) is provided on a side wall of the oil collecting box (70).

8. The oil-water separation device according to claim 1, characterized in that an end of the oil drain pipe (40) located inside the separation tank (10) is not lower than an end of the oil drain pipe (40) located outside the separation tank (10) in a vertical direction.

9. The oil-water separation device according to claim 1, characterized in that a second oil drain valve (41) is connected to one end of the oil drain pipe (40) located outside the separation tank (10).

10. The oil-water separation device according to claim 1, characterized in that the separation tank (10) has a first side wall (11) and a second side wall (12) opposite each other, the feed pipe (20) being located on the first side wall (11), the drain pipe (30) being located on the second side wall (12).