CN210645907U - Oil-water separation device - Google Patents

Abstract

The oil-water separation device comprises a vertical cylinder, wherein a crude oil inlet part, a water outlet part and an oil outlet part which are communicated with the interior of the cylinder are respectively arranged on the cylinder, the oil outlet part is positioned at the upper part of the cylinder, the water outlet part is positioned at the lower part of the cylinder and extends towards the upper part of the cylinder, and the crude oil inlet part is positioned between the oil outlet part and the water outlet part; a separation part having a hydrophilic film thereon, the separation part being accommodated in the barrel, the separation part being located between the water outlet part and the oil outlet part and the crude oil inlet part being located at a side of the separation part. The utility model discloses an oil-water separator contains the separation portion of hydrophilic membrane through the setting to the setting is advanced crude oil portion, is gone out water portion and is gone out oil portion, consequently can accomplish the separation of profit with comparatively simple structure, and its equipment cost is lower, the routine maintenance is easy.

Description

Oil-water separation device

Technical Field

The utility model relates to a petrochemical field especially relates to oil-water separator.

Background

The dehydration method adopted by the oil field needs to be determined according to parameters such as crude oil property, water content, emulsification degree and the like. When the water content is high, a two-stage dehydration method is generally adopted, and the water content is reduced to below 30% by a chemical sedimentation method and then treated by an electric dehydration method. However, the chemical settling method requires a long time for dehydration treatment and has low separation efficiency, and the electric dehydration method such as high-frequency or variable-frequency pulse dehydration technique is difficult to operate when treating crude oil with high water content. Therefore, the conventional two-stage dehydration method is not suitable for the treatment of highly hydrous crude oil. In addition, an oil-water separation device for oil-water separation by a rotational flow shearing method is also provided, and the oil-water separation device breaks emulsion under the action of a high-speed centrifugal field by utilizing different oil-water densities to realize oil-water separation. The stronger the centrifugal field, the better the demulsification and separation effects, but the high-speed centrifugal oil-water separation device has higher cost and is difficult to maintain.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the more difficult technical problem of cost height, routine maintenance that current oil-water separator exists, provided an oil-water separator.

The oil-water separation device comprises a vertical cylinder, wherein a crude oil inlet part, a water outlet part and an oil outlet part which are communicated with the interior of the cylinder are respectively arranged on the cylinder, the oil outlet part is positioned at the upper part of the cylinder, the water outlet part is positioned at the lower part of the cylinder, and the crude oil inlet part is positioned between the oil outlet part and the water outlet part; a separation part having a hydrophilic film thereon, the separation part being accommodated in the barrel, the separation part being located between the water outlet part and the oil outlet part and the crude oil inlet part being located at a side of the separation part.

Preferably, the separation part includes a plurality of screens having hollow inner pipes, the hydrophilic membrane being disposed on the screens, the screens extending in an axial direction of the cylinder.

Further preferably, a partition part is arranged between the water outlet part and the separation part, the partition part comprises a partition plate, a first communication hole is formed in the partition plate, and the first communication hole is communicated with the inner pipe of the sieve pipe.

Still further, it is preferable that a flow slowing portion is further provided, the flow slowing portion being accommodated in the cylinder, the flow slowing portion including a flow slowing plate, the flow slowing plate being located between the oil inlet portion and the oil outlet portion, the flow slowing plate being provided with a second communication hole and a third communication hole allowing the sieve tube to pass therethrough.

Preferably, the flow-slowing plates are provided with a plurality of positions distributed along the axial direction of the cylinder body, and the second communication holes on the adjacent flow-slowing plates are not coaxial along the axial direction.

Preferably, between the crude oil inlet part and the sieve tube, a blocking part is arranged, and the blocking part is positioned in the cylinder and has a clearance with the inner wall of the cylinder.

Further preferably, the connection columns extend in the axial direction of the cylinder, the flow slowing plates are respectively welded to the connection columns, and the third communication holes of the flow slowing plates can allow the sieve tube to pass through.

Preferably, the barrel body comprises a barrel cover, a middle barrel and a bottom barrel, the barrel cover and the bottom barrel are respectively locked with the middle barrel through bolts, and sealing rings are respectively arranged between the barrel cover and one end of the middle barrel and between the bottom barrel and the other end of the middle barrel.

Preferably, the outlet portion comprises an outlet pipe extending towards the upper part of the cylinder and having an outlet higher than the sieve conduit.

Preferably, the separation part includes a plurality of screens distributed in an axial direction of the cylinder, and separators respectively disposed between two adjacent screens, the hydrophilic film being disposed on the screens.

The utility model discloses an oil-water separator contains the separation portion of hydrophilic membrane through the setting to the setting is advanced crude oil portion, is gone out water portion and is gone out oil portion, consequently can accomplish the separation of profit with comparatively simple structure, and its equipment cost is lower, the routine maintenance is easy.

Drawings

FIG. 1 is a schematic external view of an embodiment of an oil-water separator according to the present invention;

FIG. 2 is a cross-sectional view of the oil-water separator of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2A;

FIG. 4 is a partial view of the oil-water separator of FIG. 1 with the cover and the middle cylinder omitted;

FIG. 5 is a schematic view of the partition of FIG. 3;

FIG. 6 is a schematic view of the baffle of FIG. 4;

fig. 7 is a schematic view of another embodiment of the separating portion.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the present invention can be implemented in many different ways, and is not limited to the embodiments described herein, but rather, these embodiments are provided to enable those skilled in the art to understand the disclosure more thoroughly.

Further, the description of illustrative embodiments in accordance with the principles of the invention is intended to be read in connection with the accompanying drawings, which are to be considered part of the entire written description. In describing the disclosed embodiments of the present invention, reference to any direction or orientation is intended only for convenience of illustration and is not intended to limit the scope of the present invention in any way. Relative terms such as "front," "back," "upper," "lower," "rear," "outer," "inner," "middle," "inner," "outer," "lower," "upper," "horizontal," "vertical," "above," "below," "up," "down," "top" and "bottom") and derivatives thereof (e.g., "horizontally," "downwardly," "upwardly," etc.) should be construed to refer to the orientation as then described or as shown in the drawing under discussion. These relative terms are for convenience of description only and do not require that the apparatus be constructed or operated in a particular orientation unless otherwise specifically stated. The invention should therefore not be limited to the exemplary embodiments which illustrate some possible non-limiting combinations of features which may be present alone or in other feature combinations; the scope of protection of the invention is defined by the appended claims.

As presently contemplated, this disclosure describes the best mode or mode of practice of the invention. The present invention is not intended to be construed as limited to the particular embodiments shown, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Like reference characters designate like or similar parts throughout the various views of the drawings.

FIG. 1 is a schematic external view of an embodiment of an oil-water separator according to the present invention; FIG. 2 is a cross-sectional view of the oil-water separator of FIG. 1; FIG. 3 is an enlarged view of a portion of FIG. 2A; referring to fig. 1, 2 and 3, the oil-water separation device includes a cylinder 1, a crude oil inlet portion 11, a water outlet portion 12 and an oil outlet portion 13 are respectively provided on the cylinder 1, a separation portion 2 is provided in the cylinder 1, the separation portion 2 is located between the water outlet portion 12 and the oil outlet portion 13, and the separation portion 2 includes a hydrophilic film. These hydrophilic membranes may be known inorganic ceramic membranes, polymer membranes, metal membranes, or the like. The common characteristics of these membrane materials are that they have a pore structure and have wettability, such as hydrophilic property or hydrophobic property, so that water or oil in the oil-water mixture can selectively pass through the pores of the membrane to realize high-efficiency separation. Wherein, hydrophilic membrane then can block the infiltration of oil, only allows water to pass through the separation membrane, and in addition, hydrophilic coating film has self-cleaning nature in the aspect of crude oil dehydration, shows bigger advantage, consequently, the utility model discloses preferred hydrophilic membrane.

Specifically, as main materials of the hydrophilic film, there are listed, for example: polymer brush coating material, hydrogel coating material and inorganic micro-nano material.

The oil-water separation device of the embodiment is to apply the separation part 2 containing the hydrophilic film to the cylinder 1, thereby realizing oil-water separation, and assist other structures such as the water outlet part 12 and the oil outlet part 13, so that the structure is very simple, no other additional driving device is needed, oil-water separation can be completed, and the device has low cost and is easy to maintain.

In this embodiment, the oil-water separation device is vertical, that is, the cylinder 1 is placed in the vertical direction, the cylinder 1 includes three parts, a cover 1a, a middle cylinder 1b and a bottom cylinder 1c, the cover 1a and the bottom cylinder 1c are respectively locked with the middle cylinder 1b through bolts, and in order to prevent liquid (such as crude oil, water and oil) from leaking, sealing rings 5 are respectively arranged between one ends of the cover 1a and the middle cylinder 1b and between the other ends of the bottom cylinder 1c and the middle cylinder 1 b.

By dividing the cylinder 1 into three parts, the cylinder 1 can be easily attached and detached, and the internal parts can be easily attached and detached, so that the parts inside the cylinder 1 can be easily replaced or maintained.

The cylinder cover 1a is made of steel plate, and a handle is welded to the cylinder cover 1 a. The middle cylinder 1b is made of steel pipe, for example, the diameter of the middle cylinder 1b is 159mm, the wall thickness of the middle cylinder is 6mm, the end surfaces of the two axial ends of the middle cylinder 1b can be welded with flanges 101 and 101 ', and bolt holes are formed in the flanges 101 and 101', so that the cylinder body 1 can be connected with the cylinder cover 1a and the bottom cylinder 1c conveniently. One end of the bottom barrel 1c is provided with an opening, the end face of the opening can be welded with a flange 102, the flange 102 is matched with a flange 101' at one end of the middle barrel 1b, the barrel cover 1a is locked through bolts, the other end of the bottom barrel 1c is sealed through steel plate welding, the bottom of the bottom barrel 1c can be provided with a sewage outlet 14, and the sewage outlet can be controlled to be opened and closed through a stop valve (not shown). In addition, a plurality of supporting legs 103 may be welded to the outer circumference of the bottom tube 1c to stably support the oil-water separation device.

The oil outlet portion 13 is located at an upper portion of the cylinder 1, and in order to increase the capacity of the oil-water separating apparatus, the oil outlet portion 13 is located substantially at a position where an uppermost end of the middle cylinder 1b is close to the cylinder cover 1a, the oil outlet portion 13 includes an oil outlet pipe 131 welded to a wall of the uppermost end of the middle cylinder 1b, the oil outlet pipe 131 is substantially perpendicular to an axial direction of the cylinder 1, and the oil outlet portion 13 may further include a shut-off valve (not shown) coupled to the oil outlet pipe 131 to control opening/closing of the oil outlet pipe.

The water outlet portion 12 is located at the lower part of the cylinder 1, the water outlet portion 12 includes a water outlet pipe 121, one end of the water outlet pipe 121 is located at the lower part of the cylinder 1, specifically, the one end can be welded to the wall of the bottom cylinder 1c, the water outlet pipe 121 extends toward the upper end of the cylinder 1 along the axial direction of the cylinder 1, and the other end of the water outlet pipe 121 is higher than the separation portion 2, and likewise, the water outlet portion 12 can further include a stop valve (not shown) coupled to the water outlet pipe 121 and controlling the opening/closing of the water outlet pipe 121. The other end of the water outlet pipe 121 is higher than the separation part 2, so that the liquid level of the crude oil is always higher than the separation part 2, the separation effect of the separation part 2 is optimized, and the separation efficiency is improved.

The oil inlet portion 11 is located between the oil outlet portion 13 and the water outlet portion 12, and is located at the side portion 2a of the separation portion 2. By providing the crude oil inlet portion 11 at the side portion 2a of the separation portion 2, crude oil to be subjected to oil-water separation first passes through the separation portion 2 to be subjected to oil-water separation, and then flows to the oil outlet portion 13 and the water outlet portion 12. The crude oil inlet portion 11 includes a crude oil inlet pipe 111 welded to the wall of the intermediate cylinder 1b, the crude oil inlet pipe 111 being substantially perpendicular to the axial direction of the cylinder 1, and similarly, the crude oil inlet portion 11 may include a shut-off valve (not shown) coupled to the crude oil inlet pipe 111 for controlling the opening/closing of the crude oil inlet pipe 111.

Fig. 4 is a partial view of the oil-water separator without a cover and an intermediate tube, fig. 5 is a schematic view of a partition, and the separator 2 will be described in further detail with reference to fig. 4 and 5.

In one embodiment, the separation part 2 comprises a plurality of screens 21 having hollow inner tubes 211, the screens 21 extending in the axial direction of the cylinder 1. The sieve 21 can be a three-layer stainless steel sintered net (i.e. a separation membrane substrate), and the sieve 21 preferably has a mesh size of 500-3000 meshes, and more preferably 3000 meshes, so as to improve the oil-water separation efficiency. The sieve tube 21 is provided with a hydrophilic film, and when the main material of the hydrophilic film is the existing coating material, such as a polymer brush coating material, a hydrogel coating material, and an inorganic micro-nano material, the hydrophilic film can be attached to the sieve tube 21 in any known manner corresponding to the hydrophilic film.

Between water outlet portion 12 and the separation portion 2, be provided with partition portion 3, partition portion 3 includes partition panel 31, and partition panel 31 is located between well section of thick bamboo 1b and the end section of thick bamboo 1c, is provided with first communicating hole 311 on the partition panel 31, and the quantity of first communicating hole 311 is the same with the quantity of screen pipe 21 to first communicating hole 311 communicates with the inner tube 211 of screen pipe 21. By providing the sieve tube 21, it is possible to improve the oil-water separation efficiency by allowing the crude oil to pass through the hydrophilic film of the sieve tube 21, enter the inner tube 211 of the sieve tube 21, and enter the water outlet portion 12 through the inner tube 211 of the sieve tube 21 and the first communication hole 311 when the sieve tube 21 is in contact with the crude oil.

Preferably, the partition portion 3 includes a plurality of guide pipes 312, the outer sides of the plurality of guide pipes 312 are respectively inserted into the first communication holes 311 of the partition plate 31 and are welded and fixed, both ends of the guide pipes 312 are respectively exposed at both sides of the partition plate 31, that is, at the bottom cylinder 1c side and the middle cylinder 1b side, the end portions of the guide pipes 312 at the middle cylinder 1b side are provided with external threads, and on the contrary, the end portions of the screen pipe 21 connected with the guide pipes 312 are provided with internal threads, thereby realizing the threaded connection of the screen pipe 21 and the guide pipes 312. This allows the connection between the spout unit 12 and the separation unit 2 only through the inner tube 211 of the sieve tube 21 and the first communication hole 311, thereby preventing crude oil that is not filtered by the sieve tube 21 and is not subjected to oil-water separation from entering the spout unit 12. Additionally, the screen 21 is threadably connected to the conduit 312 to facilitate replacement of the screen 21.

In order to avoid that the crude oil entering the inside of the cylinder 1 via the crude oil pipe directly hits the screen 21, resulting in damage to the screen 21. Between the crude oil inlet 11 and the screen 21, a blocking member 42 is disposed, the blocking member 42 is located in the cylinder 1 and has a gap with the inner wall of the cylinder 1, preferably, the blocking member 42 is annular, and the outer diameter thereof is smaller than the inner diameter of the cylinder 1, so that a gap is formed between the inner wall of the cylinder 1 and the outer wall of the blocking member 42, when crude oil enters the cylinder 1 through the crude oil pipe, the crude oil directly impacts the outer wall of the blocking member 42 and then flows into the cylinder 1 along the gap between the inner wall of the cylinder 1 and the outer wall of the blocking member 42, thereby preventing the crude oil from directly impacting the screen 21.

When the oil-water separation device is installed, the sieve tube 21 is installed on the guide tube 312, then the bottom cylinder 1c is used as a reference, the partition plate 31 formed by welding with the guide tube 312 is placed on the bottom cylinder 1c, the middle cylinder 1b is placed on the partition plate 31, and finally the bottom cylinder 1c and the middle cylinder 1b are locked through bolts and nuts, so that the cylinder body 1 is convenient to disassemble and assemble, the sieve tube 21 is convenient to replace, and the later maintenance of the oil-water separation device is easy.

Fig. 6 is a schematic diagram of the flow slowing plate of fig. 4, and referring to fig. 6 and continuing to fig. 4, in order to slow down the crude oil in the cylinder 1, increase the contact time between the crude oil and the sieve tube 21, and further improve the efficiency of oil-water separation, it is preferable that a flow slowing portion 4 is further provided in the cylinder 1, the flow slowing portion 4 includes a flow slowing plate 41, the flow slowing plate 41 is located between the crude oil inlet portion 11 and the oil outlet portion 13, and the flow slowing plate 41 is provided with a second communication hole 411 and a third communication hole 412 for allowing the sieve tube 21 to pass through. The baffle plate 41 may have a disk shape, the outer diameter of the baffle plate 41 is slightly smaller than the inner diameter of the cylinder 1, and the second communication hole 411 is formed in the baffle plate 41 to communicate the crude oil inlet 11 and the oil outlet 13. Of course, the baffle plate 41 may be provided in a disk shape having a notch on the outer periphery thereof for communicating the oil inlet portion 11 and the oil outlet portion 13. The number of the third communication holes 412 is the same as the number of the screen 21 for avoiding the screen 21.

Preferably, the second communication hole 411 is provided in the vicinity of the third communication hole 412 to achieve a liquid level in the cylinder 1, and each contacts the third communication hole 412 allowing the sieve tube 21 to pass therethrough when rising through the second communication hole 411, thereby further increasing a contact time of the crude oil with the sieve tube 21.

It is further preferable that the slow flow plates 41 have a plurality of positions, each slow flow plate 41 is substantially perpendicular to the axial direction of the cylinder 1 and distributed along the axial direction of the cylinder 1, and the second communication holes 411 of the adjacent slow flow plates 41 are not coaxial along the axial direction. By providing the axially non-coaxial second communication hole 411, the flow distance of the liquid (crude oil or oil) when the liquid level rises can be extended, thereby further increasing the contact time of the crude oil with the screen 21.

A plurality of baffle plates 41 may be placed into the cylinder 1 as a whole. Specifically, the slow flow portion 4 further includes connecting columns 43, the connecting columns 43 have four pieces, for example, the connecting columns 43 extend in the axial direction of the cylinder 1, the slow flow plates 41 are respectively welded to the connecting columns 43, and the third communication holes 412 of the slow flow plates 41 can allow the sieve tube 21 to pass through, that is: the third communication holes 412 of the welded baffles 41 are arranged coaxially. The annular stopper 42 of the present embodiment may be welded to the connection post 43. Therefore, in the present embodiment, the slow flow portion 4 can be directly placed in the cylindrical body 1, that is, when the slow flow portion 4 needs to be attached or detached, the slow flow portion 4 can be attached or detached by simply opening the cylindrical cover 1 a.

FIG. 7 is a schematic view showing another embodiment of the separation part 2 ', and referring to FIG. 7, the separation part 2 may include a plurality of layers of screens 21' (i.e., separation membrane substrates), the screens 21 'being stainless sintered meshes, the screens 21' being provided with the above-described hydrophilic membrane provided on the screens 21.

Similarly, the mesh 21' may be a three-layer stainless steel sintered mesh, and the mesh number of the mesh is preferably 500 to 3000 mesh, and more preferably 3000 mesh, to improve the oil-water separation efficiency. The multiple layers of screens 21' may be distributed along the axial direction of the cylinder 1. In order to support and partition the screens 21 ', the separating part 2 is provided with partitions 22 between the screens 21', respectively, the outer diameter of the partitions 22 being slightly smaller than the inner diameter of the cylinder 1, the partitions 22 may be annular, and are respectively located between two layers of screens 21 'to partition different screens 21', wherein the lowermost layer of screens 21 'is directly supported on the partition plate 31, and then the different screens 21' and the different partitions 22 are respectively distributed in the axial direction of the cylinder 1. At this time, the hole of the crude oil inlet pipe 111 communicating with the cylinder 1 may be located at the side of one of the partitions 22 (i.e., the outside of the wall of the annular partition 22), where the outside of the partition 22 simultaneously functions as a stopper 42 to prevent crude oil entering the interior of the cylinder 1 through the crude oil pipe 111 from directly impacting the screen 21 'and causing damage to the screen 21'. Further, in order to improve the pressure-bearing capacity of the screen, the partition 22 may also be provided in a honeycomb shape, thereby increasing the support area of the screen 21'.

In this embodiment, since the screen 21' and the partition 22 are stacked in the axial direction in the cylinder 1, the screen can be easily attached and detached, and the subsequent maintenance can be easily performed.

The various features described in the foregoing detailed description may be combined in any manner and, for the sake of unnecessary repetition, the invention is not limited in its scope to the particular combinations illustrated.

The above embodiments are only used for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement that does not depart from the scope of the present invention should be construed as being included in the technical solutions of the present invention.

Claims (10)

1. The oil-water separation device is characterized by comprising

The oil outlet part is positioned at the upper part of the cylinder body, the water outlet part is positioned at the lower part of the cylinder body, and the crude oil inlet part is positioned between the oil outlet part and the water outlet part;

a separation part having a hydrophilic film thereon, the separation part being accommodated in the barrel, the separation part being located between the water outlet part and the oil outlet part and the crude oil inlet part being located at a side of the separation part.

2. The oil-water separator according to claim 1, wherein the separator includes a plurality of screens having hollow inner tubes, the hydrophilic membrane being provided on the screens, the screens extending in an axial direction of the cylinder.

3. The oil-water separator according to claim 2, wherein a partition is provided between the water outlet portion and the separation portion, the partition comprises a partition plate, the partition plate is provided with a first communication hole, and the first communication hole is communicated with the inner pipe of the sieve pipe.

4. The oil-water separator according to claim 2 or 3, further comprising a flow buffer part accommodated in the cylinder, the flow buffer part including a flow buffer plate located between the oil inlet part and the oil outlet part, the flow buffer plate having a second communication hole and a third communication hole for allowing the sieve tube to pass therethrough.

5. The oil-water separator according to claim 4, wherein the plurality of baffle plates are arranged in the axial direction of the cylindrical body, and the second communication holes of adjacent baffle plates are not axially coaxial.

6. The oil-water separator according to claim 2, wherein a stopper is provided between the oil inlet portion and the sieve tube, and the stopper is located in the cylinder and has a gap with an inner wall of the cylinder.

7. The oil-water separator according to claim 5, wherein the flow delaying portions further comprise connecting columns extending in the axial direction of the cylinder, wherein the flow delaying plates are welded to the connecting columns, respectively, and the third communication holes of the flow delaying plates allow the sieve tube to pass therethrough.

8. The oil-water separator according to claim 1, wherein the cylinder comprises a cylinder cover, a middle cylinder and a bottom cylinder, the cylinder cover and the bottom cylinder are respectively locked with the middle cylinder through bolts, and sealing rings are respectively arranged between the cylinder cover and one end of the middle cylinder and between the bottom cylinder and the other end of the middle cylinder.

9. The oil-water separator according to claim 2, wherein the outlet portion comprises an outlet pipe extending toward the upper portion of the cylinder and having an outlet higher than the sieve pipe.

10. The oil-water separator according to claim 1, wherein the separator includes a plurality of screens arranged in the axial direction of the cylinder and separators respectively disposed between two adjacent screens, and the hydrophilic film is disposed on the screens.

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