CN114427549B - Wedge wave annular flow generator - Google Patents
Wedge wave annular flow generator Download PDFInfo
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- CN114427549B CN114427549B CN202210103521.4A CN202210103521A CN114427549B CN 114427549 B CN114427549 B CN 114427549B CN 202210103521 A CN202210103521 A CN 202210103521A CN 114427549 B CN114427549 B CN 114427549B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 146
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 76
- 239000012071 phase Substances 0.000 description 34
- 239000008346 aqueous phase Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/48—Control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/17—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by mixing with another liquid, i.e. diluting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The utility model discloses a wedge wave annular flow generator, which comprises an annular flow transportation pipeline, an oil inlet pipeline, an annular flow water inlet pipeline and a wedge wave generating device, wherein the oil inlet pipeline and the annular flow transportation pipeline are coaxially arranged and are mutually communicated; the axis of the annular flow water inlet pipeline is perpendicular to and communicated with the axis of the annular flow transportation pipeline; the wedge wave generating device comprises a pressing plate arranged at the tail end of the oil inlet pipeline and an impact water inlet pipeline arranged on the outer wall of the annular flow transportation pipeline; wherein the axis of the impact water inlet pipeline is vertical to the axis of the annular flow transportation pipeline; the pressing plate controls water flow to enter through the impact water inlet pipeline to realize downward movement and resetting. The utility model can make the water phase generate pressure opposite to the buoyancy direction caused by the density difference in the running process, so that the oil water to be destabilized flows back to be stabilized in a ring shape, thereby improving the stable conveying distance of the thick oil and improving the conveying efficiency of the thick oil.
Description
Technical Field
The utility model relates to an oil-water annular flow conveying device, in particular to a wedge-shaped wave annular flow generator.
Background
With the continuous acceleration of the development of human civilization, the consumption rate of petroleum resources on land is also continuously accelerated, and the serious petroleum resource problem makes the eyes of human beings direct to marine petroleum resources.
However, due to the characteristics of large density and high viscosity of the marine thick oil resource, the thick oil is easy to adhere in the pipeline due to the characteristics of the thick oil in the transportation process. Aiming at the defects, researchers at home and abroad propose a plurality of modes for transporting the thick oil, such as a heating method, an emulsifying method and a dilution method, but the methods have respective defects, such as overlarge energy consumption, change of the thick oil components and the like; the method for transporting the thick oil wrapped by the water ring can greatly reduce the friction resistance between the thick oil and the pipe wall; therefore, a water ring transportation method is commonly adopted to transport the thick oil at present, for example, the utility model patent application with application publication number of CN112253063a discloses an annular flow generator, and the annular flow generator adopts a mode of wrapping an oil phase with an aqueous phase to transport the thick oil, so that the transportation resistance of the thick oil is reduced, and the transportation efficiency of the thick oil is improved; and the utility model patent with application publication number CN205628330U issued "an annular flow nozzle", which also uses a similar method to transport thick oil, while the utility model application with application publication number CN113236202a discloses "a pulsating wave annular flow generator", which has a function of generating a certain pulsating wave form to the oil phase so as to balance it with the destabilized oil-water annular flow, thereby prolonging the length of stable transportation of thick oil.
However, the above-mentioned annular flow generator also has drawbacks: because there is the density difference between water and the viscous crude, consequently along with the continuous extension of conveying distance, the annular flow can be eccentric the condition more obvious more, namely viscous crude compresses the aqueous phase because of the effect of buoyancy, if can not exert external force and alleviate its eccentric degree, viscous crude can continuously extrude the aqueous phase, when the aqueous phase is compressed completely, viscous crude then can break away from the aqueous phase parcel to contact with the pipeline inner wall that carries annular flow, and the adhesion is on this pipeline inner wall, make the annular flow of oily water unstable completely, thereby lead to the rapid decline of pressure in the transportation pipeline, finally cause the efficiency of viscous crude transportation to reduce by a wide margin. In the above-mentioned two patents CN112253063A, CN205628330U, the water phase forming the annular flow can only reduce the possibility of vortex when the water phase is combined with the oil phase by the action of the pipe wall perpendicular to the axis of the water inlet pipe at the beginning of the entering pipe, so as to achieve the purpose of improving the stability of the annular flow, but when the water phase is combined with the oil phase and flows through the middle part of the annular flow transportation pipe, a certain force cannot be applied to the water phase, so that the problem of eccentric flow of the annular flow is solved, that is, the recovery and stability of the eccentric annular flow cannot be achieved by the components of the annular flow generator itself; in the above patent CN113236202a, compared with the two patents CN112253063A, CN205628330U, the possibility of applying an acting force to one of the two phases of the annular flow in the annular flow transportation pipeline is realized, and according to the annular run-off position, a motion law opposite to the instability change law is applied to the annular flow transportation pipeline, so that an oil phase opposite to the existing oil phase is input, but the patent realizes maintenance and stability by applying a single-phase acting force, does not interfere with the essence of generating eccentric annular flow, and fails to realize a function of transporting thick oil stably for a long distance.
In order to solve the above problems, there is a need for a generating device capable of extending the stable transportation of the oil-water annular flow to improve the transportation efficiency of the thickened oil.
Disclosure of Invention
The utility model aims to overcome the defects of the existing annular flow generator and provides a wedge-shaped wave annular flow generator, wherein the wedge-shaped wave annular flow generator refers to the principle of fluid dynamic pressure lubricating oil films, and by controlling whether water enters a water inlet pipeline or not, a periodical wedge-shaped convergence shape is generated on the upper half part of oil-water annular flow in the pipeline, unlike the prior art that the stability of the annular flow cannot be interfered or only single phase is interfered, the annular flow generator utilizes downward pressure generated by flowing of water phase in a wedge-shaped convergence space, so that the upward buoyancy effect generated by the density difference between thick oil and water phase is resisted, and the annular flow eccentric problem caused by the density difference between the two phases of the annular flow is solved, so that the stable conveying distance of the oil-water annular flow is prolonged, the occurrence of instability of the oil-water annular flow is delayed, and the conveying efficiency of thick oil is improved.
The technical scheme for solving the technical problems is as follows:
the wedge wave annular flow generator is used in an annular flow transportation pipeline for conveying thick oil and is characterized by comprising an oil inlet pipeline arranged in the annular flow transportation pipeline, an annular flow water inlet pipeline arranged on the outer wall of the annular flow transportation pipeline and a wedge wave generating device, wherein the oil inlet pipeline and the annular flow transportation pipeline are coaxially arranged and are mutually communicated; the axis of the annular flow water inlet pipeline is mutually perpendicular to the axis of the annular flow transportation pipeline and is communicated with the annular flow transportation pipeline; the wedge wave generating device comprises a pressing plate arranged at the tail end of the oil inlet pipeline and an impact water inlet pipeline arranged on the outer wall of the annular flow transportation pipeline; wherein the axis of the impact water inlet pipeline is vertical to the axis of the annular flow transportation pipeline; the pressing plate controls water flow to enter through the impact water inlet pipeline to realize downward movement and resetting.
Preferably, the oil inlet pipeline, the annular flow transportation pipeline which is coaxially arranged, and the annular flow water inlet pipeline and the impact water inlet pipeline are all provided with flanges.
Preferably, the flange of the oil inlet pipe comprises a first flange at the inlet end of the oil inlet pipe and a second flange arranged between the inlet end and the outlet end of the oil inlet pipe. The flange arranged on the annular flow transportation pipeline comprises a third flange arranged at the inlet end of the annular flow transportation pipeline and a fourth flange arranged at the outlet end of the annular flow transportation pipeline. The oil inlet pipeline and the annular flow transportation pipeline are connected through a flange.
Preferably, the annular flow water inlet pipes are arranged in a plurality of groups, the annular flow water inlet pipes are distributed at equal angles along the 270-degree direction of the circumference of the annular flow transportation pipeline, and each annular flow water inlet pipe is communicated with the annular flow transportation pipeline.
Preferably, the distance between the outer wall of the outlet end of the oil inlet pipeline and the inner wall of the annular flow transportation pipeline is 10mm-15mm.
Preferably, the impact water inlet pipeline is a single group, the impact water inlet pipeline and the annular flow water inlet pipeline are circumferentially and uniformly distributed in an end face direction view angle, and the impact water inlet pipeline is communicated with the annular flow transportation pipeline.
Preferably, the annular flow water inlet pipeline and the inlet end of the impact water inlet pipeline are provided with flanges.
Preferably, the pressing plate and the oil inlet pipeline have the same inner diameter and outer diameter, and are arranged at the upper part of the tail end of the oil inlet pipeline in a shaft fit manner through holes.
Compared with the prior art, the utility model has the following beneficial effects:
1. the wedge wave annular flow generator can generate wedge shape on water phase which is introduced by the water inlet pipeline and is not combined with thick oil introduced by the oil inlet pipeline, so that a corresponding wedge convergence space is generated on the upper part of the water ring forming the oil-water annular flow, when water introduced by the water inlet pipeline flows through the wedge convergence space, pressure opposite to the buoyancy direction caused by density difference can be generated, the problem of eccentric flow of the annular flow is solved to a certain extent, and the transportation efficiency of the thick oil is improved.
2. According to the wedge wave annular flow generator, a certain pressure can be generated on the generated oil-water annular flow through the wedge wave generating device, when the generated oil-water annular flow is about to be unstable, the electromagnetic valve connected through the impact water inlet pipeline flange is closed, the impact water inlet pipeline stops water inlet, the pressing plate of the wedge wave generating device resets, so that a wedge convergence shape is generated on the inner wall of the water phase and the annular flow conveying pipeline, when the water phase flows through the wedge convergence space, a certain pressure can be generated, and the water phase is neutralized with buoyancy generated by the density difference between thick oil and the water phase, so that the eccentrically flowing oil-water annular flow tends to be stable again, and the conveying effect of the thick oil is ensured.
Drawings
Fig. 1 and fig. 2 are schematic perspective views of an embodiment of a wedge-wave annular flow generator according to embodiment 1 of the present utility model.
Fig. 3 is a schematic perspective view (cross-sectional view) of a wedge-wave annular flow generator according to embodiment 1 of the present utility model.
Fig. 4 is a schematic view of a default initial position of the wedge wave generating device (impact water inlet pipe stopped supplying water).
Fig. 5 is a schematic view of the platen press position of the wedge wave generating device (impacting the water inlet conduit to provide water supply).
FIG. 6 is a schematic view of the water ring effect produced by the wedge wave generator.
Fig. 7 is a schematic diagram of wedge effect mechanism.
Detailed Description
The present utility model will be described in further detail with reference to examples and drawings, but embodiments of the present utility model are not limited thereto.
Example 1
Referring to fig. 1 to 3, the wedge wave annular flow generator of the present utility model includes an oil inlet pipe 1, an annular flow inlet pipe 2, an annular flow transporting pipe 3, an impingement inlet pipe 5, and a wedge wave generating device for recovering an eccentric annular flow.
Referring to fig. 1-3, the oil inlet pipe 1 is provided with an oil inlet pipe first flange 6 and an oil inlet pipe second flange 7, wherein the oil inlet pipe first flange 6 is used for being connected with a front pipe body, and the oil inlet pipe second flange 7 is used for being connected with the annular flow transportation pipe 3. The inlet end of the annular flow transportation pipeline 3 is provided with a third flange 8 which is used for being matched with the second flange 7 to realize the interconnection of the oil inlet pipeline 1 and the annular flow transportation pipeline 3. The outlet end of the annular flow transportation pipeline 3 is provided with a fourth flange 9 for connection with a rear pipe body. In addition, the inlet end of the annular flow water inlet pipeline is provided with a flange 10, and the inlet end of the impact water inlet pipeline is also provided with a flange, so that the opening and closing of the annular flow water inlet pipeline 2 or the impact water inlet pipeline 5 can be conveniently controlled. The inlet end of the impact water inlet pipeline 5 is also provided with an electromagnetic valve, and an oil-water annular flow eccentric sensor can be arranged in the annular flow conveying pipeline 3 and used for automatically controlling whether the water flow of the impact water inlet pipeline 5 flows in or not.
Referring to fig. 1 to 3, the oil inlet pipe 1 and the annular flow transporting pipe 3 are coaxially disposed and communicate with each other; the annular flow inlet pipeline 2 is arranged on the outer wall of the annular flow transportation pipeline 3 and is communicated with the annular flow transportation pipeline 3. The annular flow water inlet pipes 2 may be multiple groups, the multiple groups of annular flow water inlet pipes 2 are distributed along the 180-degree direction of the circumference of the annular flow transportation pipeline at equal angles, three groups of annular flow water inlet pipes 2 are sequentially arranged in the embodiment, 90 degrees are formed between the first group and the second group, 90 degrees are formed between the second group and the third group, 180 degrees are formed between the third group and the first group, and an impact water inlet pipe 5 is arranged between the third group and the first group. Each annular flow inlet pipe 2 is communicated with the annular flow conveying pipe 3 and is used for inputting annular flow water phase into the annular flow conveying pipe 3.
Referring to fig. 1-5, the wedge wave generating device includes an impact water inlet pipe 5 and a pressing plate 41 disposed at the end of the oil inlet pipe 1 for generating wedge shape for the water phase of the annular flow, the impact water inlet pipe 5 is disposed at the outer wall of the annular flow transportation pipe 3 and is communicated with the annular flow transportation pipe 3, the pressing plate 41 of the impact water inlet pipe 5 adopts a circular arc shape, the inner diameter and the outer diameter of the circular arc are consistent with those of the oil inlet pipe 1, so that the pressing plate can keep fit with the oil inlet pipe 1 when being pressed down, and thus vortex is not generated for the water phase and the thick oil; wherein the pressing plate 41 is positioned by hole shaft matching; the hole shaft is matched with a damping hole to control the pressing plate to press down and reset.
Referring to fig. 1-5, the pressing plate 41 of the wedge wave generating device determines an initial position through the damping hole, when the electromagnetic valve connected with the impact water inlet pipe 5 is closed, the impact water inlet pipe 5 stops water inlet, the pressing plate is not influenced by external force, namely, is in a lifted state, and can be used for generating a wedge shape 42 for water introduced into the annular water inlet pipe 2; when the electromagnetic valve is opened, the impact water inlet pipeline 5 starts to feed water, the pressing plate 41 is impacted by water flow to press down, the outer wall of the pressing plate 41 is kept in fit with the outer wall of the oil inlet pipeline 1, the water introduced into the annular water inlet pipeline 2 cannot generate a wedge shape, and the impact water inlet pipeline 5 can bear the task of introducing annular water flow. Alternatively, the pressing plate 41 may be directly controlled to be in a lifted state or a state of being attached to the outlet of the oil inlet pipe 1 by using an electromagnetic valve, and in the lifted state, the wedge-shaped shape 42 of the water introduced into the annular inflow pipe 2 may be formed.
Referring to fig. 1-5, the impact water inlet pipes 5 are perpendicular to the axis of the annular flow transportation pipeline 3, the impact water inlet pipes 5 are in a single group, the impact water inlet pipes 5 and the annular flow water inlet pipes 2 are uniformly distributed circumferentially in the end face direction view, and the impact water inlet pipes 5 are communicated with the annular flow transportation pipeline 3.
The distance between the outer wall of the outlet end of the oil inlet pipe and the inner wall of the annular flow transportation pipe is 10mm-15mm, in this embodiment, the distance between the outer wall of the oil inlet pipe 1 and the inner wall of the annular flow transportation pipe 3 is 12mm, that is, the thickness of the water entering from the annular flow inlet pipe 2 before being combined with the thick oil into an annular flow is 12mm.
Referring to fig. 1-5, the end of the oil inlet pipe 1 extends into the annular flow transportation pipe 3, and the outlet position of the oil inlet pipe 1 is slightly far away from the outlet positions of the annular flow water inlet pipe 2 and the impact water inlet pipe 5, that is, as shown in fig. 4, the outlet of the oil inlet pipe 1 is positioned at the rightmost side, the outlet of the annular flow water inlet pipe 2 is positioned at the leftmost side, the outlet of the impact water inlet pipe 5 is relatively close to the outlet of the oil inlet pipe 1, but is positioned at a slightly left position, so that the water conveyed by the annular flow water inlet pipe 2 and the impact water inlet pipe 5 can be ensured not to directly contact with thick oil or generate vortex, and the stability of the formed annular flow can be ensured; the above arrangement ensures that the thickened oil conveyed out of the oil inlet pipe 1 forms an oil-water annular flow in the annular flow conveying pipe 3 with the annular flow inlet pipe 2 and the water conveyed in by the impact inlet pipe 5.
Referring to fig. 1-7, the working principle of the utility model is as follows:
when the device works, the oil inlet pipeline 1 conveys thick oil into the annular flow conveying pipeline 3, the annular flow water inlet pipeline 2 conveys water into the annular flow conveying pipeline 3, and the water entering the annular flow conveying pipeline 3 is used as a water ring to wrap the thick oil to form oil-water annular flow to be conveyed in the annular flow conveying pipeline 3.
The oil-water annular flow is not eccentric at the beginning of transportation, so that the electromagnetic valve connected with the impact water inlet pipeline 5 is opened, namely, the annular flow water inlet pipeline 2 and the impact water inlet pipeline 5 are both in a water supply state at the moment, and conditions are provided for the combination of the annular flows; when the oil-water annular flow is in an eccentric unstable state, the electromagnetic valve connected with the impact water inlet pipeline 5 is closed, the impact water inlet pipeline 5 stops supplying water, the pressing plate 41 in the wedge wave generating device is reset after losing the external force action, so that a wedge-shaped upper half part of the water phase existing in the annular flow conveying pipeline 3 is formed, the inner wall of the annular flow conveying pipeline 3 and the action of the oil phase surface OS are combined to form a wedge-shaped convergence space, and when the water phase flows through the wedge-shaped convergence space, the situation of the eccentric instability of the annular flow is recovered due to the action force opposite to the eccentric instability of the annular flow, the stable conveying distance of the annular flow is prolonged, and the thickened oil conveying efficiency is improved.
The principle of the utility model refers to the dynamic pressure oil film mechanism of the sliding bearing, so that the pressure of wedge wave water phase refers to the total bearing capacity F of the sliding bearing oil film y Calculation formulas (1) - (3) perform calculation:
wherein eta is the dynamic viscosity, N.s/m 2 The dynamic viscosity of the water phase is selected;
b is the width of the bearing, and the length of a pressing plate in the wedge wave generating device is selected;
d is the inner diameter of the annular flow transportation pipeline 3;
v is the water flow rate;
d is the outer diameter of the oil inlet pipeline 1;
C p as a bearing capacity coefficient according to the ratio of the widths to diametersCombining the calculated results of the initial default position of the pressing plate and the eccentricity ratio to select the bearing capacity coefficient C p 1.070;
calculated to obtain
F y ＝0.00023N.
The buoyancy difference caused by the density difference is calculated as
F f ＝V(ρ w -ρ o )g； (4)
V＝π(R-r) 2 ； (5)
Wherein ρ is w Is the density of water ρ o Is the density of the oil, V is the drainage volume, R is the radius of the water phase, and R is the radius of the oil phase;
calculating according to the above formulas (4) - (5) to obtain the upward movement force of oil phase as
F f ＝0.0001232N.
In summary, the pressure F generated by the water phase flowing through the wedge-shaped converging space generated by the wedge-shaped wave generating device and the inner wall 31 of the annular flow transporting pipe y Can resist buoyancy difference F caused by density difference between thick oil and water phase f Thereby effectively solving the problem of eccentric flow of the annular flow.
The foregoing is illustrative of the present utility model, and is not to be construed as limiting thereof, but rather as merely providing for the purpose of teaching herein before described various modifications, alternatives, variations and alternatives, as well as variations and alternatives, without departing from the spirit and principles of the utility model.
Claims (10)
1. The wedge wave annular flow generator is used in an annular flow transportation pipeline for conveying thick oil and is characterized by comprising an oil inlet pipeline arranged in the annular flow transportation pipeline, an annular flow water inlet pipeline arranged on the outer wall of the annular flow transportation pipeline and a wedge wave generating device, wherein the oil inlet pipeline and the annular flow transportation pipeline are coaxially arranged and are mutually communicated; the axis of the annular flow water inlet pipeline is mutually perpendicular to the axis of the annular flow transportation pipeline and is communicated with the annular flow transportation pipeline;
the wedge wave generating device comprises a pressing plate arranged at the tail end of the oil inlet pipeline and an impact water inlet pipeline arranged on the outer wall of the annular flow transportation pipeline; wherein the axis of the impact water inlet pipeline is vertical to the axis of the annular flow transportation pipeline; the pressing plate controls water flow to enter through the impact water inlet pipeline to realize downward movement and resetting.
2. The wedge-wave annular flow generator of claim 1, wherein the oil inlet pipe and the coaxially arranged annular flow transport pipe and the annular flow water inlet pipe and the impingement water inlet pipe are provided with flanges.
3. The wedge-wave annular flow generator of claim 2, wherein the flange of the oil inlet duct arrangement comprises a first flange of the oil inlet duct inlet end and a second flange arranged between the oil inlet duct inlet end and outlet end.
4. A wedge wave annular flow generator according to claim 3, wherein the flange of the annular flow transport conduit arrangement comprises a third flange at the inlet end of the annular flow transport conduit and a fourth flange at the outlet end of the annular flow transport conduit.
5. The wedge wave annular flow generator of claim 4 wherein the oil inlet conduit and the annular flow carrier conduit are connected by a flange.
6. The wedge wave annular flow generator of claim 2 wherein the annular flow inlet conduits are of a plurality of groups, the plurality of groups of annular flow inlet conduits being arranged at equal angles along a circumferential 270 degree direction of the annular flow transport conduit, each annular flow inlet conduit being in communication with the annular flow transport conduit.
7. The wedge wave annular flow generator of claim 2 wherein the spacing between the outer wall of the outlet end of the oil inlet duct and the inner wall of the annular flow transport duct is 10mm-15mm.
8. The wedge-wave annular flow generator of claim 1, wherein the impingement water inlet pipes are of a single group, the impingement water inlet pipes and the annular flow water inlet pipes are circumferentially and evenly distributed in an end face direction view, and the impingement water inlet pipes are communicated with the annular flow transportation pipes.
9. Wedge-wave annular flow generator according to any one of claims 1-8, wherein the annular flow inlet conduit and the impingement inlet conduit inlet end are provided with flanges.
10. The wedge-wave annular flow generator according to any one of claims 1 to 8, wherein the pressing plate has the same inner and outer diameters as the oil inlet pipe, and is disposed at an upper portion of the end of the oil inlet pipe in a shaft-fitting manner through a hole.
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| CN202210103521.4A CN114427549B (en) | 2022-01-27 | 2022-01-27 | Wedge wave annular flow generator |
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| CN202210103521.4A CN114427549B (en) | 2022-01-27 | 2022-01-27 | Wedge wave annular flow generator |
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| CN114427549A CN114427549A (en) | 2022-05-03 |
| CN114427549B true CN114427549B (en) | 2023-11-14 |
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| CN113175577A (en) * | 2021-05-17 | 2021-07-27 | 广州大学 | Three-way pipe capable of forming annular flow of oil and water |
| CN113236202A (en) * | 2021-05-28 | 2021-08-10 | 广州大学 | Pulsating wave annular flow generator |
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