Gas-water jet system and method for slurry delivery pipeline

Abstract

A gas-water jet system for a slurry delivery pipeline, comprising: a microbubble generation device, a stable gas source output device and a high-pressure jet device which are connected to the microbubble generation device, and a microbubble injection device (3). The stable gas source output device is used for generating high-pressure gas and delivering the high-pressure gas to the microbubble generation device; the high-pressure jet device is used for generating high-pressure water and delivering the high-pressure water to the microbubble generation device; the microbubble generation device is used for receiving and mixing the high-pressure gas and the high-pressure water, and generating and outputting high-pressure microbubbles; and the microbubble injection device is used for injecting the high-pressure microbubbles into a slurry delivery pipeline. Also provided is a gas-water jet method for a slurry delivery pipeline. By mixing the high-pressure gas and the high-pressure water to generate high-pressure microbubbles and then injecting the high-pressure microbubbles into the slurry delivery pipeline, the drag reduction effect is achieved, friction and collision between silt particles in the pipeline and the pipe wall are reduced, drag loss is reduced, and the service life of the pipeline is prolonged.

Description

A slurry conveying pipeline jet aeration system and method Technical Field

[0001] The present invention relates to the technical field of slurry pipeline transportation, and in particular to a slurry transportation pipeline jet aeration system and method. Background Art

[0002] Pipeline transportation is the primary method of slurry transportation and is widely used in dredging and mining. Long-distance pipeline transportation generally uses a combination of suction dredgers and relay pumps to transport slurries. Since relay pumps are mostly driven by diesel engines and their structures are mainly ship-mounted and pump station-type, the layout of relay pump stations often has high requirements for site area, strength, flatness, etc. In addition, relay pump stations / relay pump ships are prone to wear of core mud pump components and slurry leakage, posing a large environmental risk. During the construction process, a large amount of manpower and material resources are also required for maintenance, which will affect the continuity of material pipeline transportation.

[0003] Since existing relay pumping stations / relay pumping ships have problems such as complex equipment structure, high energy consumption, large space, high environmental risks and high maintenance costs, the applicant has proposed the technical solution of this application.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to provide a slurry conveying pipeline jet aeration system and method, which generates high-pressure microbubbles by mixing high-pressure gas and high-pressure water, and injects the high-pressure microbubbles into the slurry conveying pipeline, thereby achieving a drag reduction effect, reducing friction and collision between mud particles in the pipeline and the pipe wall, reducing resistance losses, and extending the service life of the pipeline. At the same time, the jet impact can prevent mud and sand accumulation and blockage, ensuring long-distance pipeline transportation of mud. Furthermore, compared with conventional relay pump expansion technology, it solves the problem of relay pump layout requiring a larger site and a flat foundation, saves the labor cost of more management and maintenance personnel required during the operation of the relay pump, and reduces the risk of mud and hydraulic oil leakage to the environment from relay pump station leakage.

[0006] To achieve the above-mentioned object, the present invention provides a slurry conveying pipeline jet aeration system, comprising a microbubble generating device, a stable air source output device and a high-pressure jet device connected to the microbubble generating device, and a microbubble injection device;

[0007] The stable gas source output device is used to generate high-pressure gas and deliver the high-pressure gas to the micro-bubble generating device;

[0008] The high-pressure jet device is used to generate high-pressure water and transport the high-pressure water to the micro-bubble generating device;

[0009] The microbubble generating device is used to receive and mix the high-pressure gas and the high-pressure water, generate and output high-pressure microbubbles;

[0010] The microbubble injection device is used to inject the high-pressure microbubbles into the slurry conveying pipeline.

[0011] The present invention also provides a slurry conveying pipeline jet aeration method, which is applied to the above-mentioned slurry conveying pipeline jet aeration system, comprising:

[0012] Generate high-pressure gas through the stable gas source output device and deliver the high-pressure gas to the microbubble generating device;

[0013] Generate high-pressure water through the high-pressure jet device and deliver the high-pressure water to the micro-bubble generating device;

[0014] The microbubble generating device receives and mixes the high-pressure gas and the high-pressure water to generate and output high-pressure microbubbles;

[0015] The high-pressure microbubbles are injected into the slurry delivery pipeline through the microbubble injection device.

[0016] In one embodiment, the slurry delivery pipeline jet aeration system further includes a microbubble injection parameter measuring device, a microbubble injection effect detecting device, and a computing and controlling device;

[0017] The microbubble injection parameter measuring device is used to measure the pressure and flow of the high-pressure gas and the high-pressure water respectively;

[0018] The microbubble injection effect detection device is used to measure the pressure, flow rate and density of the slurry in the slurry conveying pipeline, as well as the oil consumption of the stable air source output device and the power consumption of the high-pressure jet device;

[0019] The computing and controlling device is used to monitor the microbubble injection parameter measuring device in real time, calculate the target pressure and target flow required by the stable gas source output device and the high-pressure jet device respectively, and control the stable gas source output device and the high-pressure jet device to achieve the target pressure and target flow.

[0020] In one embodiment, the calculation and control device is further used to monitor the microbubble injection effect detection device in real time, and calculate the increased discharge volume generated after the microbubbles are injected into the slurry conveying pipeline.

[0021] In one embodiment, the stable air source output device includes an air compressor and an air storage tank connected through a first high-pressure air pipe, and the air storage tank is provided with a pressure gauge and a safety valve;

[0022] After the air compressor generates the high-pressure gas, the high-pressure gas enters the gas storage tank through the first high-pressure gas pipe, and then enters the microbubble generating device through the second high-pressure gas pipe;

[0023] The high-pressure jet device includes a high-pressure jet pump and a water tank connected by a water intake pipe. The high-pressure jet pump is used to convert the water in the water tank into the high-pressure water, and the high-pressure water enters the microbubble generating device through the high-pressure water pipe.

[0024] In one embodiment, the microbubble generating device includes a venturi ejector, a first ejection inlet, a second ejection inlet, and an ejection outlet, wherein the venturi ejector has a mixing chamber, a first check valve and a first quick connector are provided at the first ejection inlet, a second check valve and a second quick connector are provided at the second ejection inlet, and a third quick connector is provided at the ejection outlet;

[0025] A second high-pressure gas pipe connected to the stable gas source output device is connected to the first injection inlet through the first quick connector, and the high-pressure gas enters the mixing chamber of the Venturi injector from the first injection inlet;

[0026] The high-pressure water pipe connected to the high-pressure jet device is connected to the second jet inlet through the second quick connector, and the high-pressure water enters the mixing chamber of the Venturi ejector from the second jet inlet;

[0027] The high-pressure water and the high-pressure gas produce a Venturi effect in the mixing chamber to generate high-pressure microbubbles, which are ejected from the injection outlet and then enter the slurry conveying pipeline through the microbubble injection device.

[0028] In one embodiment, the microbubble injection parameter measuring device includes a gas meter, a regulating valve and a barometer provided on the second high-pressure gas pipe, and a pressure sensor and a first flow meter provided on the high-pressure water pipe;

[0029] The gas flow meter and the barometer provided on the second high-pressure gas pipe are used to detect the pressure and flow of the high-pressure gas in the second high-pressure gas pipe;

[0030] The pressure sensor and the first flow meter provided on the high-pressure water pipe are used to detect the pressure and flow meter of the high-pressure water in the high-pressure water pipe;

[0031] The calculation and control device monitors the gas meter, the barometer, the pressure sensor and the first flow meter in real time, and adjusts the regulating valve and the high-pressure jet pump according to the calculated target pressure and target flow.

[0032] In one embodiment, the microbubble injection effect detection device includes an oil consumption level meter provided on the air compressor, an electric meter provided on the high-pressure jet pump, a slurry pressure gauge provided on the slurry delivery pipeline, a second flow meter, and a density meter;

[0033] The slurry conveying pipeline is provided with a jet aeration point, and the high-pressure microbubbles are injected into the slurry conveying pipeline from the jet aeration point;

[0034] At least two slurry pressure gauges are provided, and the at least two slurry pressure gauges are respectively provided at the front end and the rear end of the jet aeration point, for detecting the pressure of the slurry along the pipe before and after the jet aeration;

[0035] The second flow meter is used to detect the flow rate of the slurry in the slurry conveying pipeline;

[0036] The densitometer is used to detect the density of the slurry in the slurry conveying pipeline.

[0037] In one embodiment, the target pressure required by the stable gas source output device is 2 bar greater than the conveying pressure of the slurry in the slurry conveying pipeline.

[0038] In one embodiment, a jet gasification point is provided on the slurry conveying pipeline, and the microbubble injection device injects the high-pressure microbubbles into the slurry conveying pipeline through the jet gasification point; the distance between the jet gasification point and the outlet of the centrifugal mud pump on the cutter suction ship is greater than a distance threshold.

[0039] In one embodiment, the microbubble injection device includes a ball valve, a thick-walled branch pipe and a thick-walled short pipe. The ball valve is arranged on the thick-walled branch pipe, and the thick-walled branch pipe is connected to the thick-walled short pipe. The ball valve is connected to the third quick connector of the microbubble generating device to inject high-pressure microbubbles into the thick-walled branch pipe and the thick-walled short pipe.

[0040] In one embodiment, the method further comprises:

[0041] respectively measuring the pressure and flow of the high-pressure gas and the high-pressure water;

[0042] measuring the pressure, flow rate and density of the slurry in the slurry conveying pipeline, as well as the oil consumption of the stable air source output device and the power consumption of the high-pressure jet device;

[0043] The microbubble injection parameter measurement device is monitored in real time, the target pressure and target flow required by the stable air source output device and the high-pressure jet device are calculated respectively, and the stable air source output device and the high-pressure jet device are controlled to reach the target pressure and target flow.

[0044] In one embodiment, the method further includes: real-time monitoring of the microbubble injection effect detection device, and calculating the increased discharge volume generated after the microbubbles are injected into the slurry conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a schematic diagram of a slurry conveying pipeline jet aeration system according to a first embodiment of the present invention;

[0046] FIG2 is a schematic diagram of a microbubble injection parameter measurement device according to a first embodiment of the present invention;

[0047] FIG3 is a schematic diagram of a device for monitoring microbubble injection effects according to a first embodiment of the present invention;

[0048] FIG4 is a schematic diagram of a microbubble generating device according to a first embodiment of the present invention;

[0049] FIG5 is a flow chart of jet aeration control according to a second embodiment of the present invention;

[0050] FIG6 is a flow chart of optimization of jet aeration process parameters according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following will be described in detail with reference to the accompanying drawings to provide a clearer understanding of the objectives, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0052] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0053] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, that is, should be interpreted to mean "including, but not limited to."

[0054] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0055] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "or / and" unless the context clearly dictates otherwise.

[0056] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0057] The first embodiment of the present invention relates to a jet aeration system for a slurry conveying pipeline, comprising a microbubble generating device, a stable gas source output device and a high-pressure jet device connected to the microbubble generating device, a microbubble injection device, a microbubble injection parameter measurement device, a microbubble injection effect detection device, and a calculation and control device. The stable gas source output device generates high-pressure gas and delivers the high-pressure gas to the microbubble generating device. The high-pressure jet device generates high-pressure water and delivers the high-pressure water to the microbubble generating device. The microbubble generating device receives and mixes the high-pressure gas and high-pressure water, generates and outputs high-pressure microbubbles. The microbubble injection device injects the high-pressure microbubbles into the slurry conveying pipeline.

[0058] During the process of injecting high-pressure microbubbles into the slurry conveying pipeline, the microbubble injection parameter measuring device measures the pressure and flow rate of the high-pressure gas and the high-pressure water, respectively. The microbubble injection effect detection device measures the pressure, flow rate, and density of the slurry in the pipe of the slurry conveying pipeline, as well as the oil consumption of the stable air source output device and the power consumption of the high-pressure jet device. The calculation and control device monitors the microbubble injection parameter measuring device in real time, calculates the target pressure and target flow rate required by the stable air source output device and the high-pressure jet device, controls the stable air source output device and the high-pressure jet device to achieve the target pressure and target flow rate, and monitors the microbubble injection effect detection device in real time to calculate the increased displacement generated by the injection of microbubbles into the slurry conveying pipeline.

[0059] As shown in Figure 1, the stable air source output device includes an air compressor 11 and an air tank 12 connected by a first high-pressure air pipe 81. The air tank 12 is equipped with a pressure gauge 13 and a safety valve 14. After the air compressor 11 generates the high-pressure air, the high-pressure air enters the air tank 12 through the first high-pressure air pipe 81 and then enters the microbubble generating device through a second high-pressure air pipe 82, achieving a stable high-pressure air source input.

[0060] The high-pressure jet device includes a high-pressure jet pump 41 and a water tank 43 connected by a water intake pipe 42. The high-pressure jet pump 41 is used to convert the water in the water tank 43 into the high-pressure water. The high-pressure water enters the microbubble generating device through a high-pressure water pipe 44 to achieve a stable high-pressure water source input.

[0061] As shown in Figures 1 and 4, the microbubble generating device includes a Venturi ejector 22, a first ejection inlet 222, a second ejection inlet 221, and an ejection outlet 223. The Venturi ejector 22 has a mixing chamber 224. The first ejection inlet 222 is provided with a first check valve and a first quick connector 2221. The second ejection inlet 221 is provided with a second check valve and a second quick connector 2211. The ejection outlet 223 is provided with a third quick connector 2231. The second high-pressure air pipe 82 connected to the stable air source output device is connected to the first ejection inlet 222 via the first quick connector 2221. The high-pressure air enters the mixing chamber 224 of the Venturi ejector 22 from the first ejection inlet 222. The high-pressure water pipe 44 connected to the high-pressure jet device is connected to the second ejection inlet 221 via the second quick connector 2211. The high-pressure water enters the mixing chamber 224 of the Venturi ejector 22 from the second ejection inlet 221. In this way, the high-pressure water and the high-pressure gas produce a Venturi effect in the mixing chamber 224 to generate high-pressure microbubbles, which are ejected from the injection outlet 223 and then enter the slurry conveying pipeline through the microbubble injection device.

[0062] In this embodiment, microbubbles are generated through an air compressor, a pressure pipe and a microporous medium, and a gas-liquid mixture is formed with the clean water pumped by the centrifugal pump on the cutter suction vessel. The gas-liquid mixture is then pressurized by a high-pressure jet device to form a high-pressure mixture, and then injected into the mud pipeline through the bionic jet ports arranged crosswise on the pipe wall, thereby uniformly exerting the drag reduction effect, reducing the friction and collision between the sediment particles and the pipe wall, reducing the resistance loss, and extending the service life of the pipeline. At the same time, the jet impact avoids the problem of sediment accumulation and blockage, thereby ensuring long-distance pipeline transportation of the mud.

[0063] As shown in Figure 1, the microbubble injection device 3 includes a ball valve 31, a thick-walled branch pipe 32 and a thick-walled short pipe 33. The ball valve 31 is provided on the thick-walled branch pipe 32, and the thick-walled branch pipe 32 is connected to the thick-walled short pipe 33. The ball valve 31 is connected to the third quick connector 2231 of the microbubble generating device to inject high-pressure microbubbles into the thick-walled branch pipe 32 and the thick-walled short pipe 33. It should be noted that in order to reduce cavitation wear during the injection of high-pressure microbubbles, the thickness of the thick-walled branch pipe 32 and the thick-walled short pipe 33 needs to be thickened. In addition, the microbubble injection device 3 in Figure 1 is a segmented schematic diagram, and the microbubble injection device 3 is connected to the slurry conveying pipeline via a flange 331. Because the slurry delivery pipeline is a long-distance delivery pipeline, the microbubble injection device 3 is embedded in any jet aeration point on the slurry delivery pipeline. Typically, the jet aeration point is selected at a certain distance from the outlet of the centrifugal dredge pump on the cutter suction vessel. For example, the distance between the jet aeration point and the outlet of the centrifugal dredge pump on the cutter suction vessel is greater than a distance threshold. The distance threshold is a pre-set length that can be set according to the actual situation on site. This can minimize the impact of jet aeration on the operation of the dredge pump. Therefore, the representation of the microbubble injection device 3 in Figure 1 only shows a schematic positional relationship, and the specific construction structure is not limited to Figure 1.

[0064] In order to ensure the smooth progress of the high-pressure microbubble injection process into the slurry conveying pipeline, this embodiment uses a microbubble injection parameter measurement device and a microbubble injection effect detection device to monitor the construction process, and calculates the monitoring data through a computing control device to achieve the optimal construction effect.

[0065] As shown in Figure 3, the microbubble injection parameter measurement device includes a gas meter 51, a regulating valve 52, and a barometer 53 located on the second high-pressure gas pipe 82, as well as a pressure sensor 441 and a first flowmeter 442 located on the high-pressure water pipe 44. The gas meter 51 and the barometer 53 located on the second high-pressure gas pipe 82 are connected in series to detect the pressure and flow of the high-pressure gas in the second high-pressure gas pipe 82. The pressure sensor 441 and the first flowmeter 442 located on the high-pressure water pipe 44 are connected in series to detect the pressure and flow of the high-pressure water in the high-pressure water pipe. The computing and control device monitors the gas meter 51, the barometer 53, the pressure sensor 441, and the first flowmeter 442 in real time and adjusts the regulating valve 52 and the high-pressure jet pump 41 based on the calculated target pressure and target flow. For example, the output pressure and flow of the high-pressure jet pump 41 are adjusted, and the size of the regulating valve 52 is adjusted to achieve outputs with different gas pressures and flows.

[0066] As shown in Figure 2, the microbubble injection effect detection device includes an oil consumption level meter 63 provided on the air compressor 11, an electric meter 64 provided on the high-pressure jet pump 41, a slurry pressure gauge 54 provided on the slurry conveying pipeline, a second flow meter 61, and a density meter 62. A jet aeration point is provided on the slurry conveying pipeline, and the high-pressure microbubbles are injected into the slurry conveying pipeline from the jet aeration point. In this embodiment, at least two slurry pressure gauges 54 are provided, and each slurry pressure gauge 54 can be installed on a thick-walled short tube 33 to obtain the conveying pressure of the slurry in the pipe in real time. At least two of the slurry pressure gauges 54 are respectively provided at the front end and the rear end of the jet aeration point to detect the conveying pressure of the slurry along the pipe before and after the jet aeration. The second flow meter 61 is used to detect the flow rate of the slurry in the slurry conveying pipeline, and the density meter 62 is used to detect the density of the slurry in the slurry conveying pipeline. The calculation and control device monitors the fuel consumption level meter 63, the electric meter 64, the slurry pressure meter 54, the second flow meter 61, and the density meter 62 in real time, thereby calculating the drag reduction effect of the jet aeration.

[0067] It should be noted that the computing control device is a computer program running on the computer 7, and the computer 7 is respectively communicated with the gas meter 51, the regulating valve 52, the barometer 53, the pressure sensor 441, the first flow meter 442, the fuel consumption level meter 63, the electric meter 64, the slurry pressure meter 54, the second flow meter 61, the density meter 62, etc.

[0068] The second embodiment of the present invention relates to a slurry conveying pipeline jet aeration method, which is applied to the slurry conveying pipeline jet aeration system in the first embodiment.

[0069] In this embodiment, high-pressure gas is generated by the stable gas source output device, and the high-pressure gas is delivered to the microbubble generating device. High-pressure water is generated by the high-pressure jet device, and the high-pressure water is delivered to the microbubble generating device. The microbubble generating device receives and mixes the high-pressure gas and the high-pressure water, generates and outputs high-pressure microbubbles. The high-pressure microbubbles are injected into the slurry conveying pipeline by the microbubble injection device. During the microbubble injection process, the pressure and flow of the high-pressure gas and the high-pressure water are measured respectively. The pressure, flow and density of the slurry in the pipe in the slurry conveying pipeline, as well as the oil consumption of the stable gas source output device and the power consumption of the high-pressure jet device are measured. The microbubble injection parameter measuring device is monitored in real time, the target pressure and target flow required by the stable gas source output device and the high-pressure jet device are calculated respectively, and the stable gas source output device and the high-pressure jet device are controlled to reach the target pressure and target flow.

[0070] The following is an example of calculating the drag reduction effect of jet aeration. The slurry delivery pipeline is provided with a jet aeration point. The slurry pressure gauge 54 is respectively arranged at the front and rear ends of the jet aeration point to monitor the pressure along the process before and after aeration (P1, P2, ..., P n ), and the subscript i is used below to represent different jet aeration points.

[0071] The calculation formula of the conveying resistance λ1 before aeration is as shown in Formula 1, where L1 and L2 are the pipeline lengths from the pressure measuring points P1 and P2 to the mud pump outlet of the construction ship, respectively.

[0072] The calculation formula for the conveying resistance λ2 after aeration is as shown in Formula 2, where L3 and L4 are the pipeline lengths from the pressure measuring points P3 and P4 to the mud pump outlet of the construction ship, respectively.

[0073] The calculation formula for the drag reduction rate C1 is as shown in Formula 3.

[0074] The specific formula is as follows:

[0075] Formula 1:

[0076] Formula 2:

[0077] Formula 3: C1 = (λ2 - λ1) / λ1

[0078] The following is an example of calculating the flow increase effect of jet aeration. The second flow meter 61 is respectively arranged at the front end and the rear end of the jet aeration point to monitor the flow before and after aeration. The delivery flow before aeration is Q1, the delivery flow after aeration is Q2, and the calculation formula for the increased flow C2 is as shown in Formula 4.

[0079] Formula 4: C2 = (Q2 - Q1) / Q1

[0080] The following is an example of calculating the unit cost of jet aeration. The density meter 62 is arranged at the front end of the aeration point. The unit cost before aeration is M1, and its calculation formula is as shown in Formula 5. The unit cost after aeration is M2, and its calculation formula is as shown in Formula 6. The unit cost is reduced by C3, and its calculation formula is as shown in Formula 7.

[0081] Formula 5:

[0082] Among them, Y1 is the energy consumption cost of dredging ships, Y2 is the energy consumption cost of relay pumps, Y3 is the management personnel cost, and Y4 is the loss cost of ship machinery and equipment.

[0083] Formula 6:

[0084] Among them, Y5 is the energy consumption cost of the air compressor, Y6 is the energy consumption cost of the high-pressure jet pump, and Y7 is the purchase / lease cost of the jet equipment set.

[0085] Formula 7: C3 = (M1-M2) / M1

[0086] It should be noted that the above calculations of the drag reduction effect, flow increase effect, and unit cost of jet aeration are all performed on the computer 7. The computer 7 is connected to the corresponding measuring instrument via communication, obtains the measurement parameters required in the above formulas, and then performs targeted calculations.

[0087] The specific construction methods are as follows:

[0088] During the jet aeration construction process, the microbubble injection parameter measuring device and the microbubble injection effect monitoring device are used to optimize, adjust and maintain the jet aeration process parameters, and to assist in the construction of slurry transportation. As shown in Figure 5, the application steps are as follows:

[0089] Step 1: Check the pipeline. The ball valve 31 on the microbubble rapid injection device is in the closed state. Check the connection of the high-pressure air pipe and the high-pressure water pipe, and confirm that the safety valve of the gas storage tank is normal.

[0090] Step 2: Check the monitoring instrument, start the air compressor 11, check that its idling state is normal, and power on the monitoring instrument equipment to check its operation;

[0091] Step 3: Check the control instruments, start the high-pressure jet pump 41, check that its standby operation state is normal, and check the control instruments and equipment for the jet aeration process parameters;

[0092] Next, start the jet aeration to determine whether the aeration pressure meets the requirements. If it does not meet the requirements, adjust the pressure according to the jet aeration requirements.

[0093] Step 4: Open the ball valve 31 on the microbubble rapid injection device;

[0094] The following real-time monitoring of the pressure in the pipe is carried out. When the slurry pressure in the pipe changes, the jet pressure is adjusted according to the pressure in the pipe.

[0095] The fifth step is to obtain the slurry conveying status in the pipeline through real-time monitoring of the pressure sensor, flow meter and density meter, so that the slurry conveying status in the pipeline is stable, and adjust the output pressure to be 2 bar greater than the slurry conveying pressure in the pipeline;

[0096] Step 6: Continuously obtain the slurry delivery pressure in the pipeline through the pressure sensor, and provide parameters for adjusting the jet aeration process parameters in turn; specifically: after the pressure of the gas storage tank reaches the slurry delivery pressure of 2 bar in the pipeline, open the ball valve 31 on the microbubble rapid injection device 3, adjust the pressure regulating valve 52 on the microbubble injection parameter monitoring and control device 5 to the maximum, and after starting the ball valve 31 on the microbubble injection device, immediately start the high-pressure jet pump 4, so that the microbubble rapid injection device starts to operate.

[0097] Step 7: Computer 7 constantly monitors changes in the filling spacing and construction concentration, which will cause changes in the slurry conveying pressure in the mud discharge pipeline. When the slurry conveying pressure in the mud discharge pipeline near the aeration point changes significantly, the jet aeration pressure needs to be adjusted through the pressure regulating valve 52 so that the jet aeration pressure is always 2 bar greater than the slurry conveying pressure in the pipeline.

[0098] Step 8: Computer 7 monitors the sludge pipeline conveying characteristics and jet aeration process parameters and their effects in real time to ensure normal construction until the completion of construction and evacuation. Specifically, after the jet aeration booster slurry conveying construction is completed, first close the ball valve 31 and immediately shut down the air compressor and high-pressure jet pump. After the air compressor and high-pressure jet pump are completely shut down, open the pressure relief valve to release the pressure in the high-pressure air pipe and high-pressure water pipe, and then evacuate the entire set of equipment.

[0099] During the construction process, in order to achieve jet aeration and increase the pipeline slurry transportation distance and reduce energy consumption, as shown in Figure 6, the jet aeration process parameters are determined through the following application methods:

[0100] Step 1: Deploy sensors to obtain the slurry pipeline transportation status through pressure sensors, flow meters, and density meters deployed along the way;

[0101] Step 2: Obtain the conveying status by observing the fluctuation of the measured data such as pressure, flow rate, concentration, etc. on the computer to ensure that it is stable before proceeding to the next step;

[0102] Step 3: Select the aeration position, which should be at least L0 away from the pump outlet. By controlling the distance between the aeration point and the mud pump outlet, the impact of aeration on the mud pump operation can be minimized.

[0103] Step 4: Preliminary design of aeration parameters. After selecting the aeration point, the slurry delivery pressure P in the mud discharge pipe at the aeration point is calculated. injet , determine the filling pressure P air and high-pressure jet pressure P water ;

[0104] The following is a test of the pressure increase and rent reduction effect, and the jet aeration process parameters are adjusted to compare the pressure increase, drag reduction and flow increase effects before and after the adjustment, and the emission increase and energy saving effect is given.

[0105] Step 5: Adjust P through the stepless control button of the gas pressure regulating valve and the high-pressure jet pump output pressure air and P injet , and simultaneously observe the jet aeration, pressurization and drag reduction effect on the computer to keep it stable;

[0106] Step 6: When the internal delivery pressure of the pipeline changes, the jet aeration pressure-increasing and drag-reducing effect on the computer is observed in real time, and the P is adjusted in a coordinated manner. air and P injet , and combined with the gas pressure and the increased L on the computer more (Formula 8) and energy saving effect (using Formula 7) to determine the new jet aeration process parameters;

[0107] Step 7: The displacement increase can be regarded as the sum of the displacement increase caused by the pressure increase and the displacement increase caused by the drag reduction during the refueling process.

[0108] Formula 8: L more =ΔL1+ΔL2

[0109] Formula 9: ΔL1=ΔP / λ2

[0110] Formula 10: ΔL2=L×C1

[0111] Among them, L more is the increase in row spacing caused by aeration, ΔP is the pressure difference between the pressure after aeration and the pressure before aeration, L is the length of the mud discharge pipeline after the aeration point, ΔL1 is the increase in row spacing caused by pressurization after aeration, and ΔL2 is the increase in row spacing caused by drag reduction after aeration.

[0112] In some examples, the control logic of computer 7 is as follows:

[0113] First, start each corresponding device and monitoring computer (i.e. computer 7) to ensure the normal operation of each device. Read all P pressure, Q flow, C concentration data, and record the data in the database to draw the status curve in real time.

[0114] Secondly, record the P pressure, Q flow rate, and C concentration data before adding gas, calculate the resistance λ1 before adding gas according to formula 1, and record the basic data.

[0115] Next, the Pair and Pinjet are adjusted in conjunction with the stepless control buttons on the gas pressure regulating valve and the high-pressure jet pump's output pressure. The adjustment principle is alternating increase, with a 10-minute wait period after each increase. During this process, the pressure increase and drag reduction effect are calculated using Formulas 1 through 10. The aeration effect shows a trend of first increasing and then decreasing during the adjustment process, with the highest peak parameters recorded. If the effect decreases during operation, the Pair and Pinjet need to be readjusted. The adjustment logic is to first decrease to determine the drag reduction effect. If both decrease, the reverse adjustment is required to increase the effect.

[0116] Finally, after the construction stops, first close the gas pipes, then shut down the water pumps, air compressors and other equipment.

[0117] Compared with conventional relay pump discharge enhancement technology, this embodiment solves the problem of relay pump layout requiring a larger site and a flat foundation, solves the problem of relay pumps requiring frequent replacement of accessories due to wear and tear, which affects construction continuity, saves the labor cost of more management and maintenance personnel required during the operation of the relay pump, and reduces the risk of mud and hydraulic oil leakage to the environment caused by relay pump station leakage. Furthermore, the slurry conveying pipeline jet aeration system and method of the present invention have good pressurization, drag reduction, discharge enhancement and energy saving effects, significantly improves the level of automated control of the jet aeration effect, greatly simplifies the workload of maintenance and transfer, is beneficial to ensuring high-quality and efficient completion of jet aeration and discharge enhancement work, and has broad application prospects.

[0118] Since the first embodiment corresponds to this embodiment, this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and the technical effects achieved in the first embodiment can also be achieved in this embodiment. To reduce repetition, they will not be repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment.

[0119] While preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0120] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be construed as limited to the specific embodiments disclosed in the specification and claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

Claims

1. A slurry conveying pipeline jet aeration system, characterized in that: It comprises a microbubble generating device, a stable gas source output device and a high-pressure jet device connected to the microbubble generating device, and a microbubble injecting device; The stable gas source output device is used to generate high-pressure gas and transport the high-pressure gas to the micro-bubble generating device; The high-pressure jet device is used to generate high-pressure water and transport the high-pressure water to the micro-bubble generating device; The microbubble generating device is used to receive and mix the high-pressure gas and the high-pressure water, generate and output high-pressure microbubbles; The microbubble injection device is used to inject the high-pressure microbubbles into the slurry conveying pipeline.

2. The slurry conveying pipeline jet aeration system according to claim 1 is characterized in that: It also includes a microbubble injection parameter measuring device, a microbubble injection effect detecting device and a computing control device; The microbubble injection parameter measuring device is used to measure the pressure and flow rate of the high-pressure gas and the high-pressure water respectively; The micro-bubble injection effect detection device is used to measure the pressure, flow rate and density of the slurry in the slurry delivery pipeline, as well as the oil consumption of the stable air source output device and the power consumption of the high-pressure jet device; The computing and controlling device is used to monitor the microbubble injection parameter measuring device in real time, calculate the target pressure and target flow required by the stable gas source output device and the high-pressure jet device respectively, and control the stable gas source output device and the high-pressure jet device to reach the target pressure and target flow.

3. The slurry conveying pipeline jet aeration system according to claim 2 is characterized in that: The calculation control device is also used to monitor the microbubble injection effect detection device in real time and calculate the increased discharge volume generated after the microbubbles are injected into the slurry conveying pipeline.

4. The slurry conveying pipeline jet aeration system according to claim 2, characterized in that: The stable air source output device comprises an air compressor and an air storage tank connected through a first high-pressure air pipe, and the air storage tank is provided with a pressure gauge and a safety valve; After the air compressor generates the high-pressure gas, the high-pressure gas enters the gas storage tank through the first high-pressure gas pipe, and then enters the microbubble generating device through the second high-pressure gas pipe; The high-pressure jet device includes a high-pressure jet pump and a water tank connected by a water intake pipe. The high-pressure jet pump is used to convert the water in the water tank into the high-pressure water, and the high-pressure water enters the microbubble generating device through a high-pressure water pipe.

5. The slurry conveying pipeline jet aeration system according to claim 4, characterized in that: The microbubble generating device comprises a venturi ejector, a first ejection inlet, a second ejection inlet and an ejection outlet, wherein the venturi ejector has a mixing chamber, a first check valve and a first quick connector are provided at the first ejection inlet, a second check valve and a second quick connector are provided at the second ejection inlet, and a third quick connector is provided at the ejection outlet; A second high-pressure gas pipe connected to the stable gas source output device is connected to the first injection inlet through the first quick connector, and the high-pressure gas enters the mixing chamber of the Venturi injector from the first injection inlet; The high-pressure water pipe connected to the high-pressure jet device is connected to the second jet inlet through the second quick connector, and the high-pressure water enters the mixing chamber of the Venturi ejector from the second jet inlet; The high-pressure water and the high-pressure gas produce high-pressure microbubbles in the mixing chamber through the Venturi effect. The high-pressure microbubbles are ejected from the injection outlet and then enter the slurry conveying pipeline through the microbubble injection device.

6. The slurry conveying pipeline jet aeration system according to claim 4, characterized in that: The microbubble injection parameter measuring device includes a gas meter, a regulating valve and a barometer arranged on the second high-pressure gas pipe, and a pressure sensor and a first flow meter arranged on the high-pressure water pipe; The gas flow meter and the barometer provided on the second high-pressure gas pipe are used to detect the pressure and flow rate of the high-pressure gas in the second high-pressure gas pipe; The pressure sensor and the first flow meter provided on the high-pressure water pipe are used to detect the pressure and flow of the high-pressure water in the high-pressure water pipe; The computing and controlling device monitors the gas meter, the barometer, the pressure sensor and the first flow in real time The regulating valve and the high-pressure jet pump are adjusted according to the calculated target pressure and target flow.

7. The slurry conveying pipeline jet aeration system according to claim 4, characterized in that: The microbubble injection effect detection device includes an oil consumption level meter provided on the air compressor, an electric meter provided on the high-pressure jet pump, a slurry pressure meter provided on the slurry conveying pipeline, a second flow meter, and a density meter; The slurry conveying pipeline is provided with a jet gas adding point, and the high-pressure microbubbles are injected into the slurry conveying pipeline from the jet gas adding point; At least two slurry pressure gauges are provided, and at least two slurry pressure gauges are respectively provided at the front end and the rear end of the jet aeration point, and are used to detect the pressure of the slurry along the pipe before and after the jet aeration; The second flow meter is used to detect the flow rate of the slurry in the slurry conveying pipeline; The densitometer is used to detect the density of the slurry in the slurry conveying pipeline.

8. The slurry conveying pipeline jet aeration system according to claim 2, characterized in that: The target pressure required by the stable gas source output device is 2 bar greater than the conveying pressure of the slurry in the slurry conveying pipeline.

9. The slurry conveying pipeline jet aeration system according to claim 2, characterized in that: The slurry conveying pipeline is provided with a jet gas adding point, and the micro bubble injection device injects the high-pressure micro bubbles into the slurry conveying pipeline through the jet gas adding point; The distance between the jet gas filling point and the outlet of the centrifugal mud pump on the cutter suction vessel is greater than the distance threshold.

10. The slurry conveying pipeline jet aeration system according to claim 5, characterized in that: The microbubble injection device includes a ball valve, a thick-walled branch pipe and a thick-walled short pipe. The ball valve is arranged on the thick-walled branch pipe, the thick-walled branch pipe is connected to the thick-walled short pipe, and the ball valve is connected to the third quick connector of the microbubble generating device to inject high-pressure microbubbles into the thick-walled branch pipe and the thick-walled short pipe.

11. A method for jetting aeration in a slurry delivery pipeline, characterized in that: The slurry conveying pipeline jet aeration system applied to any one of claims 1 to 10 comprises: Generate high-pressure gas through the stable gas source output device and transport the high-pressure gas to the micro-bubble generating device; The high-pressure jet device generates high-pressure water, and the high-pressure water is delivered to the microbubble generator. Bio-device; The micro-bubble generating device receives and mixes the high-pressure gas and the high-pressure water to generate and output high-pressure micro-bubbles; The high-pressure microbubbles are injected into the slurry conveying pipeline through the microbubble injection device.

12. The slurry conveying pipeline jet aeration method according to claim 11, characterized in that: Also includes: respectively measuring the pressure and flow rate of the high-pressure gas and the high-pressure water; Measuring the pressure, flow rate and density of the slurry in the slurry conveying pipeline, as well as the oil consumption of the stable gas source output device and the power consumption of the high-pressure jet device; The microbubble injection parameter measuring device is monitored in real time, the target pressure and target flow rate required by the stable gas source output device and the high-pressure jet device are calculated respectively, and the stable gas source output device and the high-pressure jet device are controlled to reach the target pressure and target flow rate.

13. The slurry conveying pipeline jet aeration method according to claim 12, characterized in that: Also includes: The microbubble injection effect detection device is monitored in real time to calculate the increased discharge volume generated after the microbubbles are injected into the slurry conveying pipeline.

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