Cross array jetting air-laid slurry delivery device

Abstract

The application discloses a cross array type jet flow air-entraining slurry conveying device, which comprises a liquid conveying system, a gas conveying system, a jet flow system, a jet flow module, a jetting module and a slurry conveying module, wherein the jet flow module is connected with the end of the liquid conveying system through a pressurizing module to inject the gas-liquid mixture into the slurry conveying module through the jetting module; the jet flow module is provided with a plurality of shunt ring pipes which are connected with the pressurizing module through shunt straight pipes, each of the shunt ring pipes is provided with a plurality of outlets, and the outlets on the adjacent shunt ring pipes are distributed in a staggered mode; the bionic jet flow ports arranged on the pipe wall in a cross mode are injected into the slurry pipeline to uniformly exert the drag reduction effect, reduce the friction and collision between the silt particles and the pipe wall, reduce the resistance loss, prolong the service life of the pipeline, meanwhile, the jet flow impact avoids the problems of silt accumulation and blockage, and guarantees the long-distance pipeline conveying of the slurry.

Description

Technical Field

[0001] This invention relates to the technical field of marine transportation engineering, specifically to a cross-array jet aerated mud conveying device. Background Technology

[0002] Due to the accelerated investment in the construction of various marine transportation engineering facilities and the long-term maintenance of sea lanes, pipeline transportation has been widely used because of its advantages such as low pollution, continuous operation and large transportation capacity, and has become the main means of channel dredging, submarine trenching and deep-sea mining.

[0003] Due to the high viscosity and density of the mud, the friction and collision forces between the mud and the pipe wall are relatively large. This not only increases the energy loss of the fluid and shortens the service life of the pipeline, but also, because its movement speed is less than the flow velocity in the pipe, it is easy to accumulate at the reverse slope and bends of the pipe, leading to system shutdown, maintenance and cleaning, which seriously affects the efficiency and cost of the project.

[0004] To address engineering problems such as high energy consumption, pipe blockage, and pipe corrosion, relay pump stations are often installed in the middle of mud pipes in actual projects to increase external energy input and overcome the resistance loss of mud. However, this method of auxiliary delivery has new problems such as complex equipment, difficult installation, and inconvenient operation. Replacing new pipes is often used to solve the problem of pipe corrosion, but this cannot reduce pipe wear at the source, resulting in high costs and low efficiency.

[0005] In summary, there is a need to design a cross-array jet aerated mud conveying device to solve the above-mentioned problems in the existing technology. Summary of the Invention

[0006] This invention provides a cross-array jet aerated mud conveying device, which solves the problems of blockage and erosion in existing mud transport pipelines.

[0007] To achieve the goal of solving the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A cross-array jet aerated mud conveying device includes:

[0009] A liquid delivery system used to provide the liquid required for the jet;

[0010] A gas delivery system, which is connected to a liquid delivery system via a bubble generation module, is used to fill the liquid with bubbles to form a gas-liquid mixture;

[0011] The jet system includes a jet module, an injection module, and a mud delivery module.

[0012] The jet module is connected to the end of the liquid delivery system via a pressurization module to inject the gas-liquid mixture into the mud delivery module through the jet module;

[0013] The jet module is provided with multiple flow-diverting ring pipes, all of which are connected to the pressurization module through flow-diverting straight pipes. Each flow-diverting ring pipe is provided with multiple outlets, and the outlets on adjacent flow-diverting ring pipes are staggered.

[0014] In some embodiments of the present invention, the injection module includes a fluid inlet and a fluid nozzle, wherein the fluid inlet is connected to the outlet, and the opening direction of the fluid nozzle is the same as the conveying direction of the mud.

[0015] In some embodiments of the present invention, both the fluid inlet and the fluid nozzle are provided on the injection body, the injection body is provided with a bottom surface and an arc surface, the fluid inlet is located on the bottom surface, and the fluid nozzle is located on the arc surface.

[0016] In some embodiments of the present invention, a one-way flow valve is provided between the fluid inlet and the fluid jet to prevent silt from seeping into the diversion ring pipe.

[0017] In some embodiments of the present invention, the mud conveying module is provided with a mud conveying pipe, and the mud conveying pipe has a plurality of mounting holes, the distribution of which corresponds to the position of the outlet.

[0018] In some embodiments of the present invention, the bottom surface is connected to the mud conveying pipe; the arc surface protrudes radially along the mud conveying pipe.

[0019] In some embodiments of the present invention, the liquid delivery system includes a centrifugal water pump and a liquid pipeline, which are fixedly connected, and a flow meter is provided on the liquid pipeline.

[0020] In some embodiments of the present invention, the gas delivery system includes an air compressor, a pressure tank and a gas pipeline connected in sequence, and a gas meter is provided on the gas pipeline.

[0021] In some embodiments of the present invention, the bubble generating module adopts a pipeline with several elongated through holes, one end of the bubble generating module is connected to the gas pipeline, and the other end is connected to the liquid pipeline.

[0022] In some embodiments of the present invention, the gas pipeline is further provided with a constant pressure regulating valve for regulating the air pressure inside the pressure tank.

[0023] The technical solution of the present invention has the following technical effects compared with the prior art:

[0024] This invention generates microbubbles using an air compressor, pressure tank, and microporous medium. These microbubbles mix with clean water pumped by a centrifugal pump to form a gas-liquid mixture. The mixture is then pressurized by a high-pressure jet device to form a high-pressure mixture, which is injected into the mud pipeline through biomimetic jet nozzles arranged crosswise along the pipe wall. This uniformly reduces drag, decreases friction and collision between mud particles and the pipe wall, reduces resistance loss, and extends the pipeline's service life. At the same time, the jet impact avoids the problem of mud accumulation and blockage, ensuring long-distance pipeline transportation of mud. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a cross-array jet aerated mud conveying device shown in the embodiment.

[0027] Figure 2 This is a three-dimensional schematic diagram of the jet system shown in the embodiment.

[0028] Figure 3 This is a three-dimensional schematic diagram of the jet module shown in the embodiment.

[0029] Figure 4 This is a three-dimensional schematic diagram of the spray module shown in the embodiment.

[0030] Figure 5 This is a three-dimensional structural schematic diagram of the conveying module shown in the embodiment.

[0031] Figure 6 for Figure 2 Radial cross-sectional view.

[0032] Figure 7 This is a three-dimensional structural schematic diagram of the bubble production module shown in the embodiment.

[0033] Reference numerals: 100-Liquid delivery system; 110-Centrifugal water pump; 120-Flow meter; 130-Liquid pipeline; 200-Gas delivery system; 210-Air compressor; 220-Pressure tank; 230-Gas meter; 240-Constant pressure regulating valve; 250-Gas pipeline; 300-Bubble generation module; 400-Pressure module; 500-Jet system; 510-Jet module; 511-First diversion ring pipe; 512-Second diversion ring pipe; 513-Third diversion ring pipe; 514-Diversion straight pipe; 520-Injection module; 521-Injection body; 522-Bottom surface; 523-Arc surface; 524-Fluid inlet; 525-Fluid nozzle; 530-Slurry delivery module; 531-Slurry pipeline; 532-Mounting hole. Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0040] Reference Figure 1 As shown, a cross-array jet aerated mud conveying device includes:

[0041] Liquid delivery system 100, which is used to provide the liquid required for the jet;

[0042] A gas delivery system 200, which is connected to a liquid delivery system via a bubble generation module 300, is used to fill the liquid with bubbles to form a gas-liquid mixture.

[0043] Jet system 500, reference Figure 2 As shown, it includes a jet module 510, an injection module 520, and a mud conveying module 530.

[0044] The jet module 510 is connected to the end of the liquid delivery system 100 via the pressurization module 400 to inject the gas-liquid mixture into the mud delivery module 530 via the injection module 520.

[0045] Reference Figure 3 and Figure 5 As shown, the jet module 510 is provided with multiple flow-diverting ring pipes, all of which are connected to the pressurization module 400 through flow-diverting straight pipes 514. Each flow-diverting ring pipe has multiple outlets, and the outlets on adjacent flow-diverting ring pipes are staggered. Figure 6 As shown, the generated microbubbles are evenly distributed in the mud conveying module 530 to fully utilize the drag reduction effect.

[0046] Specifically, in this embodiment, the jet module 510 includes a first diversion ring pipe 511, a second diversion ring pipe 512, and a third diversion ring pipe 513, which can be equally spaced and sleeved on the outside of the mud conveying module 530.

[0047] One side of the first diversion ring pipe 511, the second diversion ring pipe 512, and the third diversion ring pipe 513 is connected to a diversion straight pipe 514, which is connected to the liquid delivery system 100 and the gas delivery system 200, and is used to deliver and distribute the gas-liquid mixture into the first diversion ring pipe 511, the second diversion ring pipe 512, and the third diversion ring pipe 513.

[0048] In some embodiments of the present invention, the first diversion ring 511, the second diversion ring 512, and the third diversion ring 513 are further referred to. Figure 3 As shown, each diversion ring pipe has four outlets. In this embodiment, the 12 outlets opened by each diversion ring pipe are located in different radial directions, that is, the distribution of each outlet is in a cross array, which can make the gas-liquid mixture evenly distributed throughout the inner wall of the pipe, reduce the damage of mud to the pipe, and further achieve the technical effect of drag reduction.

[0049] Meanwhile, because the mounting holes 532 on the mud conveying module 530, i.e., the mud pipe 531, correspond one-to-one with the outlet positions, refer to... Figure 5 As shown, along the length of the mud pipe 531, the line connecting the installation holes 532 corresponding to the outlets of adjacent diversion ring pipes is an oblique line on the pipe wall. This allows microbubbles ejected from the installation holes 532 to cover the entire inner wall of the pipe, effectively disrupting the flocculated network structure in the mud, which is more conducive to the suspension of fine particles of mud and sand and prevents siltation.

[0050] In some embodiments of the present invention, reference is made to... Figure 4 As shown, the injection module 520 includes a fluid inlet 524 and a fluid nozzle 525. The fluid inlet 524 is connected to the outlet, and the opening direction of the fluid nozzle 525 is the same as the conveying direction of the mud. That is, the gas-liquid mixture is ejected along the axial direction of the mud pipe 531, which can change the flow field structure near the pipe wall and directly impact the mud, sand and rocks near the wall. The impact force is greater than that of pure gas jet, avoiding the problem of mud accumulation and blockage, and ensuring the long-distance pipeline transportation of mud.

[0051] In some embodiments of the present invention, reference continues to be made to... Figure 4 As shown, both the fluid inlet 524 and the fluid nozzle 525 are provided on the injection body 521. The injection body 521 has a bottom surface 522 and an arc surface 523. The fluid inlet 524 is located on the bottom surface 522, and the fluid nozzle 525 is located on the arc surface 523.

[0052] Specifically, the bottom surface 522 is connected to the mud conveying pipe 531; the arc surface 523 protrudes radially along the mud conveying pipe 531.

[0053] During use, the gas-liquid mixture reaches the mounting hole 532 of the mud pipe 531 through the pressurization module 400, then enters the injection module 520 through the fluid inlet 524 set on the bottom surface 522, and finally enters the mud pipe 531 through the fluid nozzle 525 set on the arc surface 523. Utilizing the viscosity and density difference between mud and air, a thin layer of microbubbles and mud mixture is formed on the pipe wall by jetting, which reduces the effective viscosity and density of the fluid near the wall, reduces the friction and collision between mud particles and the pipe wall, and extends the service life of the mud pipe 531.

[0054] In some embodiments of the present invention, a one-way flow valve (not shown in the figure) is provided between the fluid inlet 524 and the fluid jet 525 to prevent mud and sand from seeping into the diversion ring pipe.

[0055] The high-pressure gas-liquid mixture is injected into the mud pipe 531. The streamlined shape reduces the resistance of the mud when it flows through the fluid injection port 525. A one-way valve is installed at the opening of the fluid injection port 525. When the device is operating normally, the gas-liquid mixture is injected into the mud conveying module 530 through the one-way valve. When the device stops working, the one-way valve is closed to prevent mud and sand from seeping into each of the diversion ring pipes, thus ensuring the normal operation of the device.

[0056] In some embodiments of the present invention, for the liquid delivery system 100, refer to... Figure 1 As shown, it includes a centrifugal water pump 110 and a liquid pipeline 130, which are fixedly connected. The centrifugal water pump 110 is used to supply clean water and provide the liquid required for the jet. The liquid pipeline 130 is equipped with a flow meter 120 for measuring the flow rate of the clean water.

[0057] In some embodiments of the present invention, the gas delivery system 200 includes an air compressor 210, a pressure tank 220, and a gas pipeline 250 connected in sequence. The air compressor 210 is used to supply air and provide the gas required for the jet. The pressure tank 220 is used to store compressed air, provide a buffer for the compressed air, remove airflow pulsations in the pipeline, and ensure that the pipeline system can obtain a constant air pressure. The gas pipeline 250 is equipped with a gas flow meter 230 for measuring the flow rate of the compressed air.

[0058] In some embodiments of the present invention, the gas pipeline 250 is further provided with a constant pressure regulating valve 240 for regulating the air pressure in the pressure tank 220. This ensures the automatic shutdown of the air compressor 210, maintains the air pressure in the pressure tank 220 within a suitable range, and automatically stops the air compressor 210 when the set pressure is reached, thereby achieving energy saving and preventing accidents.

[0059] In some embodiments of the present invention, reference is made to... Figure 7 As shown, the bubble generating module 300 adopts a pipeline with several elongated through holes. One end of the bubble generating module is connected to the gas pipeline 250, and the other end is connected to the liquid pipeline 130.

[0060] During operation, the centrifugal water pump 110 pumps clean water into the liquid pipeline 130, and the air compressor 210 pumps the gas required for the jet into the gas pipeline 250. Then, pressure is used to force the gas into the bubble generating module 300. That is, the gas enters the liquid pipeline 130 through several elongated through-holes, thus obtaining a gas-liquid mixture. (Continue referring to...) Figure 1 As shown, the gas-liquid mixture enters the jet system 500 after passing through the pressurization module 400.

[0061] The process of conveying mud in this invention is as follows:

[0062] Before injecting air into the mud pipe 531, a trial transport is required. The target pressure value of the pressurization module 400 is determined according to the mud transport conditions to ensure that the gas-liquid mixture jet can be evenly distributed on the wall of the mud pipe 531.

[0063] First, ensure that the liquid pipeline 130 and the pump casing of the centrifugal water pump 110 are filled with clean water. Then, turn on the centrifugal water pump 110 and the air compressor 210. The air compressor 210 generates gas, which is stored in the pressure tank 220 to remove airflow pulsation in the gas pipeline 250 and ensure stable air pressure. Then, the gas mixture is dispersed by the bubble generation module 300 to form a gas-liquid mixture of microbubbles and clean water. Finally, the pressurization module 400 pressurizes the gas-liquid mixture, and the high-pressure gas-liquid mixture is transported to the first diversion ring pipe 511, the second diversion ring pipe 512 and the third diversion ring pipe 513 through the diversion straight pipe 514 in the jet module 510, and then enters various parts of the mud pipeline 531.

[0064] During the initial operation, the operating power of the centrifugal water pump 110 and the air compressor 210 is adjusted according to the index of the gas meter 230 and the flow meter 120 until the optimal mixing ratio of microbubbles and clean water is found to achieve the best drag reduction, anti-clogging and anti-erosion effects, and ensure the long-distance pipeline transportation of mud.

[0065] The technical solution of the present invention has the following technical effects compared with the prior art:

[0066] This device leverages the dual advantages of microbubble drag reduction and axial jetting. On one hand, the axial jetting of the gas-liquid mixture alters the flow field structure near the wall of the mud pipe 531. The gas-liquid mixture directly impacts the mud, sand, and rocks near the wall through the fluid nozzle 525 of the jetting module 520, and the impact force is greater than that of pure gas jetting, avoiding the problem of mud accumulation and blockage, and ensuring the long-distance pipeline transportation of mud. On the other hand, by utilizing the viscosity and density difference between mud and air, a thin layer of microbubble and mud mixture is formed at the pipe sidewall through jetting, reducing the effective viscosity and density of the fluid near the wall, reducing the friction and collision between mud particles and the pipe wall, and extending the service life of the pipeline.

[0067] This device adopts a cross-array jet nozzle arrangement, that is, the outlet positions of each diversion ring pipe are cross-set, which allows microbubbles to be more evenly distributed throughout the pipe sidewall, fully destroying the flocculated network structure in the mud, which is more conducive to the suspension of fine particles of mud and sand and prevents siltation.

[0068] This device adopts the streamlined shape of fish to design a biomimetic jet module 520, which can effectively reduce the resistance of the slurry when it passes through the fluid nozzle 525. The fluid nozzle 525 is set on the arc surface 523 of the jet body 521, so that the direction of the gas-liquid mixture is the same as the direction of mud transportation, ensuring the rapid transportation of mud.

[0069] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0070] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cross-array jet aerated mud conveying device, characterized in that, include: A liquid delivery system used to provide the liquid required for the jet; A gas delivery system, which is connected to a liquid delivery system via a bubble generation module, is used to fill the liquid with bubbles to form a gas-liquid mixture; The jet system includes a jet module, an injection module, and a mud delivery module. The jet module is connected to the end of the liquid delivery system via a pressurization module to inject the gas-liquid mixture into the mud delivery module through the jet module; The jet module is provided with multiple flow-diverting ring pipes, all of which are connected to the pressurization module through flow-diverting straight pipes. Each flow-diverting ring pipe is provided with multiple outlets, and the outlets on the flow-diverting ring pipes are staggered in different radial directions from the outlets on adjacent flow-diverting ring pipes.

2. The cross-array jet aerated mud conveying device according to claim 1, characterized in that, The injection module includes a fluid inlet and a fluid nozzle, wherein the fluid inlet is connected to the outlet, and the opening direction of the fluid nozzle is the same as the mud conveying direction.

3. The cross-array jet aerated mud conveying device according to claim 2, characterized in that, Both the fluid inlet and the fluid nozzle are located on the injection body. The injection body has a bottom surface and an arc surface. The fluid inlet is located on the bottom surface, and the fluid nozzle is located on the arc surface.

4. The cross-array jet aerated mud conveying device according to claim 2, characterized in that, A one-way flow valve is provided between the fluid inlet and the fluid jet to prevent mud and sand from seeping into the diversion ring pipe.

5. A cross-array jet aerated mud conveying device according to claim 3, characterized in that, The mud conveying module is equipped with a mud conveying pipe, and the mud conveying pipe has multiple mounting holes, the distribution of which corresponds to the position of the outlet.

6. The cross-array jet aerated mud conveying device according to claim 5, characterized in that, The bottom surface is connected to the mud conveying pipeline; the arc surface protrudes radially along the mud conveying pipeline.

7. The cross-array jet aerated mud conveying device according to claim 1, characterized in that, The liquid delivery system includes a centrifugal water pump and a liquid pipeline, which are fixedly connected. A flow meter is installed on the liquid pipeline.

8. A cross-array jet aerated mud conveying device according to claim 7, characterized in that, The gas delivery system includes an air compressor, a pressure tank, and a gas pipeline connected in sequence, and a gas meter is installed on the gas pipeline.

9. A cross-array jet aerated mud conveying device according to claim 8, characterized in that, The bubble generating module uses a pipe with several elongated through holes. One end of the bubble generating module is connected to the gas pipe, and the other end is connected to the liquid pipe.

10. A cross-array jet aerated mud conveying device according to claim 8, characterized in that, The gas pipeline is also equipped with a constant pressure regulating valve, which is used to regulate the air pressure in the pressure tank.

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