Axial flow homogenizing underwater gas-liquid multiphase booster pump

Abstract

The application adopts an underwater gas-liquid multiphase booster pump of axial flow homogenization type, comprising: a double-layer flow channel, the double-layer flow channel comprising an inner flow channel and an outer flow channel in communication; a water inlet flow channel in communication with the outer flow channel; a first baffle arranged on one side of the outer flow channel close to the water inlet flow channel and used for blocking the water inlet flow channel and the outer flow channel, wherein a plurality of first through holes are arranged on the first baffle, and the first through holes are used for communicating the water inlet flow channel and the outer flow channel. The fluid is homogenously mixed through the first through holes of the first baffle, and then enters the inner flow channel after being fully mixed, so that the different phase fluids can be fully mixed during conveying, the arrangement structure is simple, the oil-gas mixing efficiency is high, and the cavitation damage to the subsequent structure is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the field of gas-liquid delivery, in particular to an underwater gas-liquid multiphase booster pump with axial flow and homogenization. BACKGROUND

[0002] In domestic and foreign oil fields, the commonly used method for oil and gas gathering and transportation is to first separate oil and gas, and then to conduct single-phase delivery of the liquid and the gas, which requires a complete set of oil and gas gathering and transportation system, including separation equipment and separate gas and liquid delivery pipelines.

[0003] However, for long-distance or underwater transportation, the delivery cost is high, and if a plurality of transportation pipelines are arranged by still adopting the gas-liquid separation mode, the cost is very high; in the related art, there is also a mode of gas-liquid mixed transportation for the same-pipeline transportation of oil and gas, but the structure is complex and the oil and gas mixing efficiency is low.

[0004] Therefore, there is an urgent need for an underwater gas-liquid multiphase booster pump with axial flow and homogenization, which has a simple structure and high oil and gas mixing efficiency. SUMMARY

[0005] To overcome the above problems, the application provides an underwater gas-liquid multiphase booster pump with axial flow and homogenization, fluid is homogenously mixed through the first through holes of the first baffle, and after being fully mixed, the fluid enters the inner flow channel, so that different phases of fluid can be fully mixed during delivery, the arrangement structure is simple, the oil and gas mixing efficiency is high, and the cavitation damage to the subsequent structure is reduced.

[0006] The technical scheme adopted by the application is as follows: in a first aspect, the application provides an underwater gas-liquid multiphase booster pump with axial flow and homogenization, comprising: a double-layer flow channel, the double-layer flow channel comprising an inner flow channel and an outer flow channel in communication; a water inlet flow channel in communication with the outer flow channel; a first baffle arranged on one side of the outer flow channel close to the water inlet flow channel and used for blocking the water inlet flow channel and the outer flow channel, wherein a plurality of first through holes are arranged on the first baffle, and the first through holes are used for communicating the water inlet flow channel and the outer flow channel. Fluid is homogenously mixed through the first through holes of the first baffle, and after being fully mixed, the fluid enters the inner flow channel, so that different phases of fluid can be fully mixed during delivery, the arrangement structure is simple, the oil and gas mixing efficiency is high, and the cavitation damage to the subsequent structure is reduced.

[0007] In some embodiments of the application, the outer flow channel has a first cavity and a second cavity separated by the first baffle, the first cavity is in communication with the water inlet flow channel, and the second cavity is in communication with the inner flow channel. Fluid flows from the first cavity to the second cavity, is evenly divided through the plurality of first through holes, at least liquid and gas are fully mixed, and the cavitation damage of the gas to the subsequent structure is reduced.

[0008] In some embodiments of the present application, the outer flow channel has a first outer ring wall and a first inner ring wall, the first baffle is annular in structure, and a first gap is arranged between the first outer ring wall and the first baffle, wherein the first outer ring wall is provided with a water inlet communicated with the water inlet flow channel. The annular first gap can be used for annular water inlet, and the annular space structure of the flow channel is fully utilized to reduce the occupied space.

[0009] In some embodiments of the present application, the outer flow channel has a first end portion communicated with the inner flow channel, and the water inlet flow channel is arranged at one end of the outer flow channel away from the first end portion. The flow path of the fluid before the first baffle is increased, and more first through holes can be arranged on the flow path to realize sufficient mixing of oil and gas.

[0010] In some embodiments of the present application, the plurality of first through holes are arranged in a rectangular array on the first baffle. Uniform distribution can improve the mixing efficiency and mixing effect of the fluid.

[0011] In some embodiments of the present application, the inner flow channel is provided with a driving assembly for providing power for fluid movement. The mixed fluid moves to the driving assembly, which can reduce the cavitation damage of the driving assembly by gas.

[0012] In some embodiments of the present application, the driving assembly includes an impeller and a guide vane arranged in sequence along a first direction, the impeller is used for pumping fluid, and the guide vane is used for collecting fluid, and the first direction includes the flow direction of the fluid in the inner flow channel. It can play a role in pumping fluid while fully mixing the fluid.

[0013] In some embodiments of the present application, the number of impellers and guide vanes is multiple, and the impellers and guide vanes are alternately and spacedly arranged in the first direction. The fluid is further mixed.

[0014] In some embodiments of the present application, the first end portion is arc-shaped, and the width of the first end portion gradually decreases along the flow direction of the fluid. The just homogenized fluid can be compressed to realize secondary mixing.

[0015] The beneficial effects of the present application are:

[0016] The application adopts an underwater gas-liquid multiphase booster pump of axial flow homogenization type, comprising: a double-layer flow channel, the double-layer flow channel comprising an inner flow channel and an outer flow channel in communication; a water inlet flow channel in communication with the outer flow channel; a first baffle arranged on one side of the outer flow channel close to the water inlet flow channel and used for blocking the water inlet flow channel and the outer flow channel, wherein a plurality of first through holes are arranged on the first baffle, and the first through holes are used for communicating the water inlet flow channel and the outer flow channel. The fluid is homogenously mixed through the first through holes of the first baffle, and after being fully mixed, the fluid enters the inner flow channel, so that the different-phase fluids can be fully mixed during conveying, the arrangement structure is simple, the oil-gas mixing efficiency is high, and the cavitation damage to the subsequent structure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a sectional view structure diagram of the application;

[0018] Figure 2 It is a sectional view structure diagram of the application;

[0019] Figure 3 It is a local structure diagram of the application;

[0020] Figure 4 It is a guide vane structure diagram of the application;

[0021] Figure 5 It is an impeller structure diagram of the application.

[0022] Specific element symbol explanation:

[0023] 1-water inlet flow channel, 2-first baffle, 3-outer flow channel, 4-inner flow channel, 5-driving assembly, 6-rotation shaft, 31-first outer ring wall, 32-first inner ring wall, 33-first end, 51-guide vane, 52-impeller. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. The components of the embodiments of the application described and shown in the drawings herein can be arranged and designed in various different configurations. The following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0025] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third", and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. The specific meanings of the above terms in the present application can be understood in specific cases by those of ordinary skill in the art.

[0026] As a key technology for land and deep-sea oil and gas exploitation engineering projects, the key equipment of multiphase boosting pump. At present, foreign German Bornemann Company, Norwegian Framo Company, French Sulzer Company and Leistritz Company underwater multiphase pump products almost monopolize the domestic user market.

[0027] There is no professional design, production, sales and after-sales underwater multiphase booster pump research and development institutions in China. Domestic enterprises more on the selection of underwater multiphase booster pump, structure discussion, status and development trend are discussed, and there is no engineering practical application results. Therefore, the continuous research, development and application of underwater multiphase booster pump technology are imminent.

[0028] Please refer to Figures 1 to 5 The embodiment provides an underwater gas-liquid multiphase booster pump of axial flow homogenization type, which comprises: a double-layer flow channel, the double-layer flow channel comprises an inner flow channel 4 and an outer flow channel 3 which are communicated; a water inlet flow channel 1 which is communicated with the outer flow channel 3; a first baffle 2 which is arranged on one side of the outer flow channel 3 close to the water inlet flow channel 1 and is used for blocking the water inlet flow channel 1 and the outer flow channel 3, wherein a plurality of first through holes are arranged on the first baffle 2, and the first through holes are used for communicating the water inlet flow channel 1 and the outer flow channel 3. The fluid is homogenized and mixed through the first through holes of the first baffle 2, and then enters the inner flow channel 4 after being fully mixed, so that the different phase fluids can be fully mixed during conveying, the arrangement structure is simple, the oil-gas mixing efficiency is high, and the cavitation damage to the subsequent structure is reduced.

[0029] In some embodiments, the underwater gas-liquid multiphase booster pump of axial flow homogenization type is mainly used for conveying after oil and gas mixing.

[0030] In some embodiments, the first baffle 2 is used as a homogenizer.

[0031] In some embodiments of the present application, the outer flow channel 3 has a first cavity and a second cavity separated by the first baffle 2, the first cavity is in communication with the water inlet channel 1, and the second cavity is in communication with the inner flow channel 4. Fluid flows from the first cavity to the second cavity, is evenly divided through the plurality of first through holes, and achieves sufficient mixing of at least liquid and gas, reducing the cavitation damage of the subsequent structure by gas.

[0032] In some embodiments of the present application, the outer flow channel 3 has a first outer ring wall 31 and a first inner ring wall 32, the first baffle 2 is in a ring structure, and a first gap is provided between the first outer ring wall 31 and the first baffle 2, wherein the first outer ring wall 31 is provided with a water inlet in communication with the water inlet channel 1. The ring-shaped first gap can be used for ring-shaped water inlet, fully utilizing the ring-shaped space structure of the flow channel, and reducing the occupied space.

[0033] In some embodiments of the present application, the outer flow channel 3 has a first end 33 in communication with the inner flow channel 4, and the water inlet channel 1 is arranged at one end of the outer flow channel 3 away from the first end 33. The flow path of the fluid before the first baffle 2 is increased, and more first through holes can be arranged on the flow path to achieve sufficient mixing of oil and gas.

[0034] In some embodiments of the present application, the plurality of first through holes are arranged in a rectangular array on the first baffle 2. Uniform distribution can improve the mixing efficiency and mixing effect of the fluid.

[0035] In some embodiments of the present application, the inner flow channel 4 is provided with a driving assembly 5 for providing power for fluid movement. The mixed fluid moves to the driving assembly 5, which can reduce the cavitation damage of the driving assembly 5 by gas.

[0036] In some embodiments of the present application, the driving assembly 5 includes an impeller 52 and a guide vane 51 arranged in sequence along a first direction, the impeller 52 is used for pumping fluid, and the guide vane 51 is used for collecting fluid, the first direction includes the flow direction of the fluid in the inner flow channel 4. It can play a role in pumping fluid while fully mixing the fluid.

[0037] In some embodiments of the present application, the number of impellers 52 and guide vanes 51 is multiple, and the impellers 52 and guide vanes 51 are alternately and spaced apart in the first direction. Further mixing of the fluid.

[0038] In some embodiments of the present application, the number of impellers 52 is N (N is an integer ≥1), and the number of guide vanes 51 is N or N+1. More preferably, the number of impellers 52 is 2, and the number of guide vanes 51 is 2.

[0039] In some embodiments of the present application, the first end portion 33 is arc-shaped, and the first end portion 33 gradually decreases in width along the fluid flow direction. The just homogenized fluid can be compressed to achieve secondary mixing.

[0040] In the present application, a rotating shaft 6 is further provided, which transmits kinetic energy to the impeller 52, and mechanical energy is converted into kinetic energy. The gas-containing liquid flow moves to the guide vane 51 under the axial pushing of the impeller 52. At this time, the pressure at the inlet area of the impeller 52 is lower than that at the suction section area. Under the action of the pressure difference, the gas-containing liquid flow in the water inlet channel 1 flows to and through the first baffle 2. Under the sufficient dispersion, compression and mixing of the gas-containing liquid flow through the first baffle 2, the diameter of the gas is reduced, and the gas is more uniformly distributed in the liquid flow. The fully mixed gas-containing liquid flow is compressed by the first end portion 33 to be mixed again, further mixing the gas into the liquid, reducing the possibility of cavitation of the gas-containing liquid flow at the inlet area of the impeller 52, and finally flowing through the inner flow channel 4 under the pushing of the impeller 52 and the guide vane 51, and finally entering the system pipeline.

[0041] The foregoing description has been set forth to illustrate the basic concepts of the present application. It is apparent that the above detailed disclosure is merely exemplary and does not limit the present application. Although the present application is not explicitly described, those skilled in the art can make various modifications, improvements and corrections to the present application. Such modifications, improvements and corrections are suggested in the present application, so they still belong to the spirit and scope of the exemplary embodiments of the present application.

[0042] At the same time, specific words are used in the present application to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" means that a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "one embodiment" or "one alternative embodiment" mentioned in different places in the specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0043] Similarly, it should be noted that, in order to simplify the description of the present application and to help understand one or more embodiments of the present application, sometimes multiple features are combined into one embodiment, figure or description of it. However, this disclosure method does not mean that the features required by the present application are more than the features mentioned in the claims. In fact, the features of the embodiment are less than all the features of the disclosed single embodiment.

[0044] In some embodiments, numbers that describe amounts, dimensions, and so forth, are used in the description of the embodiments. It should be understood that the numerical values set forth in the description of the embodiments are approximations that can vary. Unless otherwise stated, the numerical values set forth in the specification and claims have 20 percent added and subtracted to the base numerical value. Accordingly, it is contemplated that any numerical value, unless indicated otherwise, can contain a tolerance of ± 20 percent. It is also understood that, as used in the description herein, the meaning of "a," "an," and "the" include plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the following terms have the following meanings:

[0045] Each patent, patent application, publication, document, article, book, instruction manual, and / or other material cited or referenced in this application is hereby incorporated by reference in its entirety for all purposes to the same extent as if each individual patent, patent application, publication, document, article, book, instruction manual, and / or other material were specifically and individually indicated to be incorporated by reference in its entirety for all purposes. In the event of inconsistencies between the disclosure of this application and the materials incorporated by reference, the disclosure of this application shall prevail.

[0046] The technical solutions provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by using specific examples. The above descriptions of the embodiments are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application, and the above description should not be understood as a limitation on the present application.

Claims

1. An axial flow homogenizing underwater gas-liquid multiphase booster pump, characterized in that, include: A double-layer flow channel, wherein the double-layer flow channel includes a connected inner flow channel and an outer flow channel; The water inlet channel is connected to the outer channel; A first baffle is disposed on the side of the outer flow channel close to the inlet flow channel and is used to block the inlet flow channel and the outer flow channel. The first baffle is provided with a plurality of first through holes, which are used to connect the inlet flow channel and the outer flow channel. The outer flow channel has a first cavity and a second cavity separated by the first baffle. The first cavity is connected to the water inlet channel, and the second cavity is connected to the inner flow channel. The plurality of first through holes are distributed in a rectangular array on the first baffle; The outer flow channel has a first end that communicates with the inner flow channel, and the water inlet channel is located at the end of the outer flow channel away from the first end; the first end has an arc-shaped structure, and its width gradually decreases along the fluid flow direction.

2. The axial flow homogenizing underwater gas-liquid multiphase booster pump according to claim 1, characterized in that, The outer flow channel has a first outer ring wall and a first inner ring wall. The first baffle is an annular structure, and a first gap is provided between the first outer ring wall and the first baffle. The first outer ring wall is provided with an inlet that communicates with the water inlet channel.

3. The axial flow homogenizing underwater gas-liquid multiphase booster pump according to claim 1, characterized in that, A drive assembly is provided on the inner flow channel, which is used to provide power for fluid movement.

4. The axial flow homogenizing underwater gas-liquid multiphase booster pump according to claim 3, characterized in that, The drive assembly includes an impeller and guide vanes arranged sequentially along a first direction. The impeller is used to draw in fluid, and the guide vanes are used to collect fluid. The first direction includes the flow direction of the fluid within the inner flow channel.

5. The axial flow homogenizing underwater gas-liquid multiphase booster pump according to claim 4, characterized in that, The number of impellers and guide vanes is multiple, and the impellers and guide vanes are alternately spaced in the first direction.

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