An air-lift pump system for underwater mining to transport solid particles

Abstract

The present application relates to a kind of air-lift pump systems for underwater mining conveying solid particles, including material collection, lifting, pneumatic control, recycling and other systems;Material collection system collects solid particles and guides solid particles to the lifting port of lifting system, and material collection system includes material hopper, material guide chute, material collection platform and the like, lifting system lifts and separates solid particles and liquid mixture, and lifting system includes inclined hole air-lift pump, lifting pipe, pneumatic control system includes solenoid valve, several auxiliary air injection chambers, optical fiber strain sensor, microwave concentration sensor and the like, recycling system includes gas-liquid separator, axial flow turbine generator, energy storage device, bunker and the like.The present application monitors pipeline vibration and ore pulp concentration in real time through optical fiber strain sensor and concentration sensor, combined with PLC control algorithm, automatically switches three operating modes of conventional, vibration suppression and anti-blocking, greatly improves air-lift pump safety and stability.The present application installs micro axial flow turbine generator at exhaust end, and converts exhaust kinetic energy into electric energy.

Description

Technical Field

[0001] This invention relates to an airlift pump system, specifically an airlift pump system for conveying solid particles in underwater mining that can improve the safety and operational stability of the airlift pump system. Background Technology

[0002] Solid particle lifting and conveying is a common process in many engineering fields. Due to the diverse types and complex properties of solid particles, and the varying operating parameters across different processes, the design of solid particle lifting and conveying equipment presents significant challenges. Taking underwater mining, which has received considerable attention in recent years, as an example, underwater mineral resources have garnered significant interest due to their important industrial applications. Research indicates that the seabed in some marine areas is rich in various key metallic elements such as nickel, cobalt, copper, and manganese, which have wide applications in high-end equipment manufacturing, new energy materials, and other fields.

[0003] In underwater solid particle lifting and conveying equipment, the airlift pump system has become a research hotspot due to its unique advantages. This system uses compressed gas as a power source to convey solid particles upwards. Compared to conventional hydraulic and mechanical lifting methods, the airlift system has no underwater moving parts, offering advantages such as low manufacturing cost, convenient maintenance, and long stable operating time. However, existing traditional airlift pump systems still face several technical bottlenecks in underwater applications, such as severe pipeline vibration during long-distance transport, which can easily lead to structural damage; pipe blockage accidents when transporting high-concentration slurries; significant energy waste from exhaust gas; and low system energy efficiency. Therefore, developing a novel airlift pump system that integrates vibration suppression and anti-blockage, energy recovery, and intelligent control is of practical significance. Summary of the Invention

[0004] To address the aforementioned problems, the main objective of this invention is to provide an airlift pump system for conveying solid particles in underwater mining that can improve the safety and operational stability of the airlift pump system.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution: an airlift pump system for conveying solid particles in underwater mining, the airlift pump system for conveying solid particles in underwater mining includes a material collection system, a lifting system, a pneumatic control system, and a recovery system.

[0006] The collection system collects solid particles and guides them to the lifting port of the lifting system. The collection system includes a hopper, a guide chute, and a collection platform. The guide chute is located below the collection platform and leads directly into the hopper so as to guide the mixture of solid particles and liquid to the lifting pipe of the lifting system.

[0007] The lifting system lifts and separates a mixture of solid particles and liquid. The lifting system includes an inclined hole air lift pump and a lifting pipe. The inclined hole air lift pump is connected to the flange of the hopper at the bottom and to the flange of the lifting pipe at the top. The air inlet of the inclined hole air lift pump is connected to a first air source. There is an air intake passage between the first air source and the inclined hole air lift pump. A pressure sensor and a gas flow meter are installed on the air intake passage.

[0008] The pneumatic control system includes a solenoid valve, several auxiliary gas injection chambers, an optical fiber strain sensor, and a microwave concentration sensor. The auxiliary gas injection chambers are connected to the riser pipe and arranged at a preset interval. The auxiliary gas injection chambers are connected to a second gas source through the solenoid valve. The control end of the solenoid valve is connected to a computer control system. A pressure sensor is installed on the pipeline downstream of the solenoid valve. The optical fiber strain sensor and the microwave concentration sensor are respectively installed on the pipe wall below the auxiliary gas injection chamber. The optical fiber strain sensor and the microwave concentration sensor are connected to the computer control system as input ends.

[0009] The recovery system includes a gas-liquid separator, an axial flow turbine generator, an energy storage device, and a silo. The gas-liquid separator has a flat opening and an inclined opening at its bottom. The flat opening is connected to the outlet of the riser pipe, and the inclined opening is connected to the silo through a pipeline. A screen is installed inside the silo. The gas separator has a gas outlet at its top, which is connected to the inlet of the axial flow turbine generator through a pipeline. A hydrophobic and breathable membrane is installed in the pipeline between the gas outlet and the axial flow turbine generator. The output end of the axial flow turbine generator is connected to an energy storage device consisting of a supercapacitor bank.

[0010] In a specific embodiment of the present invention, the bottom of the hopper is provided with a uniformly distributed microporous structure.

[0011] In a specific embodiment of the present invention, the inclined hole air lift pump is provided with an annular air injection chamber, a main air inlet is opened on the side wall, and a number of upward-angled air injection holes are evenly distributed on the circumferential wall of the chamber.

[0012] In a specific embodiment of the present invention, the number of air injection holes ranges from 30 to 100, the diameter of the air injection holes ranges from 2 to 5 mm, and the inclination angle ranges from 30 to 60°.

[0013] In a specific embodiment of the present invention, the fiber optic strain sensor is used to monitor the lateral amplitude of the riser tube. When the lateral amplitude exceeds a set threshold, the signal is transmitted to the computer PLC system. At this time, the vibration suppression mode is activated. The computer control system controls the solenoid valve to open and performs high-pressure high-frequency pulse air intake through the auxiliary air injection chamber. The air intake frequency avoids the natural frequency of the pipeline, thereby suppressing the vibration of the pipeline.

[0014] In a specific embodiment of the present invention, a microwave concentration sensor is used to monitor the local solid phase concentration in the riser tube. When the concentration exceeds a set threshold, the signal is transmitted to the computer PLC system. At this time, the anti-blocking mode is activated, and the computer controls the solenoid valve to adjust to a low-pressure steady flow air intake mode to prevent pipe blockage.

[0015] In a specific embodiment of the present invention, the gas-liquid separator adopts a vertical structure design. A gas outlet is located at the top, directly opposite the outlet of the riser pipe. The bottom adopts a gradually expanding conical structure. After the mixed fluid enters through the riser pipe, it impacts the hydrophobic and permeable membrane located in the middle of the gas-liquid separator. The gas passes through the filter membrane and exits from the top gas outlet. The solid-liquid mixture falls back to the gradually expanding bottom after the impact and slides along the conical surface under gravity to the hopper connected to the bottom. Through a screen, liquid-solid separation is achieved. The hydrophobic and permeable membrane is made of polytetrafluoroethylene (PTFE). The pore size of the hydrophobic and permeable membrane ensures smooth gas passage while effectively blocking the solid and liquid phases from entering the axial flow turbine generator.

[0016] In a specific embodiment of the present invention, the energy storage device is an energy storage device composed of a supercapacitor bank. The energy storage device converts the recovered gas kinetic energy into electrical energy and stores it to provide auxiliary power supply for each sensor in the system.

[0017] In a specific embodiment of the present invention, the outlet of the axial flow turbine generator is provided with a one-way air valve to prevent outside air from flowing back into the gas-liquid separator; the flange connection between the auxiliary air injection chamber and the riser pipe adopts a quick-release structure.

[0018] In a specific embodiment of the present invention, the computer control system adopts a PLC controller with a built-in multi-mode control algorithm, which can automatically switch between normal operation mode, vibration suppression mode and anti-blocking mode according to sensor signals.

[0019] The positive and progressive effects of this invention are as follows: The airlift pump system for conveying solid particles in underwater mining provided by this invention has the following advantages:

[0020] The present invention proposes an airlift pump system for conveying solid particles in underwater mining. It can monitor pipeline vibration and slurry concentration in real time through fiber optic strain sensors and concentration sensors. Combined with PLC control algorithm, it can automatically switch between three operating modes: normal, vibration suppression, and anti-clogging, which greatly improves the safety and operational stability of the airlift pump system.

[0021] The present invention proposes an airlift pump system for conveying solid particles in underwater mining. Key components such as the air pump and auxiliary air injection chamber can be flexibly disassembled, which greatly shortens the underwater replacement time. In addition, an observation interface is reserved, and a pressure-resistant observation window can be installed to observe the flow evolution inside the pipe in real time. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the inclined hole air lift pump in this invention.

[0024] The following are the names corresponding to the reference numerals in this invention:

[0025] Figure 1 middle:

[0026] 1-Pressure sensor, 2-Flow meter, 3-Solenoid valve, 4-Inclined hole air lift pump, 5-Hopper, 6-Arc-shaped guide trough, 7-Collection platform, 8-Lifting pipe, 9-Auxiliary air injection chamber, 10-Fiber optic strain sensor, 11-Microwave concentration sensor, 12-Gas-liquid separator, 13-Hydrophobic and breathable membrane, 14-Axial flow turbine generator, 15-One-way air valve, 16-Energy storage device, 17-Hopper, 18-Screen.

[0027] Figure 2 In the middle: 401-Air inlet, 402-Air injection hole, 403-Outer wall of the air chamber, 404-Inner wall of the air chamber. Detailed Implementation

[0028] The preferred embodiments of the present invention are given below with reference to the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 The present invention illustrates an airlift pump system for conveying solid particles in underwater mining. The airlift pump system comprises four parts, mainly including a material collection system, a lifting system, a pneumatic control system, and a recovery system.

[0030] The material collection system includes a hopper 5, an arc-shaped guide chute 6, and a collection platform 7. The collection platform 7 is connected to the feeding system. The arc-shaped guide chute 6 is located below the collection platform 7 to guide solid particles to directly below the inlet of the riser pipe 8 so that the solid particles can enter the riser pipe 8. The bottom of the hopper 5 has a uniformly distributed microporous structure, which can effectively prevent solid material leakage and ensure the pressure balance of the internal and external seawater.

[0031] The lifting system consists of an inclined-hole air lift pump 4 and a lifting pipe 8. The inclined-hole air lift pump 4 is connected to the hopper 5 and the lifting pipe 8 via flanges. Figure 2As shown, the inclined hole air lift pump 4 is equipped with an annular air injection chamber. The inner wall 404 of the air chamber is uniformly arranged with several rows and columns of air injection holes 402. The diameter of each air injection hole can be 2-5mm, generally 3mm, and the inclination angle can be 30-60°, generally 45°. The air inlet 401 of the inclined hole air lift pump 4 is connected to the first air source. A pressure sensor 1 and a gas flow meter 2 are installed in sequence on the air inlet passage. The lift pipe 8 adopts a multi-section short pipe flange connection structure, which is convenient for installation and maintenance in underwater environment. Compressed gas enters the annular air injection chamber through the air inlet 401 and enters the lift pipe 8 through the air injection holes 402. Under the action of density difference, the solid-liquid two-phase flow in the hopper 5 is lifted into the lift pipe 8. Under continuous air supply conditions, the gas-liquid-solid three-phase flow reaches the top of the lift pipe 8.

[0032] The pneumatic control system includes a solenoid valve 3, an auxiliary gas injection chamber 9, a fiber optic strain sensor 10, and a microwave concentration sensor 11. The auxiliary gas injection chamber 9 is arranged along the axial direction of the riser pipe 8 at preset intervals via a flange connection. The auxiliary gas injection chamber 9 is connected to a second gas source through the solenoid valve 3. The control end of the solenoid valve 3 is connected to a computer control system. A pressure sensor 1 is installed on the pipeline downstream of the solenoid valve 3 to monitor the gas injection pressure. Fiber optic strain sensors 10 and microwave concentration sensors 11 are respectively installed on the pipe wall below the auxiliary gas injection chamber 9. Each sensor is connected to the computer control system as an input end. The computer control system uses a PLC controller with a built-in multi-mode control algorithm. When the flow in the riser pipe 8 is normal, this is the normal mode, and the solenoid valve 3 does not work. The fiber optic strain sensor 10 monitors the lateral vibration amplitude of the riser pipe 8 in real time. When the detected vibration amplitude exceeds a set threshold, the control system activates the vibration suppression mode and controls the solenoid valve 3 to perform high-pressure, high-frequency pulse gas intake. The microwave concentration sensor 11 monitors the solid phase concentration in the riser pipe 8 in real time. When the detected concentration exceeds a set threshold, the control system activates the anti-blocking mode and controls the solenoid valve 3 to adjust to a low-pressure, stable flow intake mode.

[0033] The recovery system includes a gas-liquid separator 12, an axial turbine generator 14, an energy storage device 16, and a silo 17. The gas-liquid separator 12 has a flat opening and an inclined opening at its bottom. The flat opening is connected to the outlet of the riser pipe 8, and the inclined opening is connected to the silo 17 through a pipeline. A screen 18 is installed in the silo 17 for solid-liquid separation. The gas-liquid separator 12 has a gas outlet at its top, which is connected to the inlet of the axial turbine generator 14 through a pipeline. A hydrophobic and breathable membrane 13 is installed in the pipeline between the gas outlet and the axial turbine generator 14. The membrane is made of polytetrafluoroethylene (PTFE) material and can effectively prevent liquid from entering the axial turbine generator 14. A one-way valve 15 is installed on the outlet pipeline of the axial turbine generator 14 to prevent backflow of outside air. The output end of the axial turbine generator 14 is connected to the energy storage device 16, which is composed of a supercapacitor bank, to provide auxiliary power supply for the various sensors in the system.

[0034] When the air-lift pump system is running, the feeding system transports solid particles to the collection platform 7, which is then guided by the arc-shaped guide chute 6 to the area directly below the lifting pipe 8 inside the hopper 5. After the first air source is started, compressed gas enters the lifting pipe 8 through the air injection port 402 of the inclined hole pneumatic pump 4. Under the action of pneumatic lifting, the solid and liquid phases in the hopper 5 are driven into the lifting pipe 8 to form a gas-liquid-solid three-phase flow. The three-phase flow rises to the top of the lifting pipe 8 and reaches the gas-liquid separator 12. The gas drives the axial flow turbine generator 14 to generate and store energy through the hydrophobic and breathable membrane 13, which serves as an auxiliary power supply for various sensors. The solid and liquid phases enter the hopper 17 under the action of gravity. Under the action of the screen 18, the ore and seawater are separated. The ore is stored in the hopper, and the seawater is returned to the ocean. The system monitors the gas flow in real time through the fiber optic strain sensor 10 and the microwave concentration sensor 11. Under normal operating conditions, the control system is in normal mode, and solenoid valve 3 is not in operation. When a fiber optic strain sensor 10 located on the pipe wall detects that the lateral vibration amplitude of the lift pipe 8 exceeds the set threshold, the second air source is activated, the control system activates the vibration suppression mode, and controls solenoid valve 3 to perform high-pressure high-frequency pulse air intake until the vibration returns to a reasonable range. Then, the control system closes the vibration suppression mode and returns to normal mode. Similarly, when the microwave concentration sensor 11 detects that the local solid phase concentration in the lift pipe 8 reaches an abnormal value, the control system activates the anti-blocking mode, the second air source is activated, and the control solenoid valve 3 is adjusted to a low-pressure steady flow air intake mode until the concentration returns to a reasonable range. Then, the control system closes the anti-blocking mode and returns to normal mode, realizing intelligent control and stable operation of the underwater solid particle lifting and conveying process.

[0035] The present invention discloses an airlift pump system for conveying solid particles in underwater mining. It can monitor pipeline vibration and slurry concentration in real time through fiber optic strain sensors and concentration sensors. Combined with PLC control algorithms, it can automatically switch between three operating modes: normal, vibration suppression, and anti-clogging, which can greatly improve the safety and operational stability of the airlift pump system.

[0036] In embodiments of the present invention, the operation of the airlift pump system is divided into three modes: normal mode, vibration suppression mode, and anti-clogging mode. The PLC controller automatically switches between these modes based on sensor signals. In normal mode, the system defaults to a closed state. The solenoid valves in each auxiliary injection chamber remain closed, and the airlift pump relies on the continuous airflow from the main air source to drive the solid-liquid two-phase mixture into the lift pipe for stable lifting. The PLC only monitors and records pressure and flow rate without making any additional adjustments. If the fiber optic strain sensor detects that the lateral vibration amplitude of the lift pipe exceeds a preset threshold A, the control system determines that there is a risk of excessive vibration and automatically switches to vibration suppression mode. In vibration suppression mode, the PLC controls the solenoid valve to open in a high-pressure, high-frequency pulse mode. The pulse frequency is set to avoid the natural frequency of the pipe, creating disturbance inside the pipe to counteract structural vibration until the amplitude returns to a safe range. The system then automatically returns to normal mode after a delay of several seconds. When the microwave concentration sensor detects that the local solid phase concentration in the lift pipe exceeds a threshold B, the control system determines that there is a risk of clogging and immediately switches to anti-clogging mode. In anti-clogging mode, the PLC controls the solenoid valve to open stably and maintain low-pressure, steady-flow gas injection, ensuring continuous bubble agitation to dilute high-concentration particle areas, preventing particle deposition and blockage, while maintaining continuous delivery. Anti-clogging mode has the highest priority; even if vibration and blockage signals occur simultaneously, the system will prioritize entering anti-clogging mode. After the concentration recovers to below the safe threshold and a certain delay is maintained, it will return to normal operation. The threshold parameters for each mode can be adjusted in real-time via the human-machine interface to adapt to different sea conditions or slurry properties.

[0037] This invention discloses an airlift pump system for conveying solid particles in underwater mining. By installing a miniature axial-flow turbine generator at the exhaust end, the kinetic energy of the exhaust gas is converted into electrical energy, stored in a supercapacitor, and prioritized for powering sensors and a PLC. This design reduces dependence on external power sources, improves energy utilization, and lowers overall system energy consumption.

[0038] In this embodiment of the invention, the conversion of exhaust gas kinetic energy into electrical energy is mainly achieved by a miniature axial flow turbine generator installed at the gas outlet at the top of the gas-liquid separator. The gas-liquid-solid three-phase flow in the pipe reaches the riser outlet and enters the gas-liquid separator. The gas is separated by a hydrophobic and permeable membrane and converges at the inlet of the miniature axial flow turbine generator. Since a continuous gas supply is required during underwater mining to maintain the lifting effect of the gas lift pump, the exhaust gas emission cycle is stable and has a certain pressure and flow rate, thus directly driving the turbine blades to rotate. The rotor of the axial flow turbine generator is connected to the miniature generator. During the continuous impact of the gas on the blades, rotational mechanical energy is generated, which is then converted into electrical energy through electromagnetic induction. The output electrical energy is rectified and regulated and stored in a supercapacitor bank, providing auxiliary power to the fiber optic strain sensor, microwave concentration sensor, and PLC controller, thereby achieving partial self-sufficiency of the system. A similar exhaust gas recovery power generation device has been disclosed in patent CN116241340A. This invention adds a hydrophobic and permeable membrane and a supercapacitor bank structure to adapt to the energy storage requirements of underwater operations.

[0039] The present invention provides an airlift pump system for conveying solid particles in underwater mining. Key components such as the air pump and auxiliary air injection chamber can be flexibly disassembled, which greatly shortens the underwater replacement time. In addition, an observation interface is reserved, which can be equipped with a pressure-resistant observation window to observe the flow evolution inside the pipe in real time.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. An airlift pump system for conveying solid particles in underwater mining, characterized in that: The airlift pump system for conveying solid particles in underwater mining includes a material collection system, a lifting system, a pneumatic control system, and a recovery system. The collection system collects solid particles and guides them to the lifting port of the lifting system. The collection system includes a hopper, a guide chute, and a collection platform. The guide chute is located below the collection platform and leads directly into the hopper so as to guide the mixture of solid particles and liquid to the lifting pipe of the lifting system. The lifting system lifts and separates a mixture of solid particles and liquid. The lifting system includes an inclined hole air lift pump and a lifting pipe. The inclined hole air lift pump is connected to the flange of the hopper at the bottom and to the flange of the lifting pipe at the top. The air inlet of the inclined hole air lift pump is connected to a first air source. There is an air intake passage between the first air source and the inclined hole air lift pump. A pressure sensor and a gas flow meter are installed on the air intake passage. The pneumatic control system includes a solenoid valve, several auxiliary gas injection chambers, an optical fiber strain sensor, and a microwave concentration sensor. The several auxiliary gas injection chambers are connected to the riser pipe and arranged axially at a preset interval. The auxiliary gas injection chambers are connected to a second gas source through the solenoid valve. The control end of the solenoid valve is connected to a computer control system. A pressure sensor is installed on the pipeline downstream of the solenoid valve. The optical fiber strain sensor and the microwave concentration sensor are respectively installed on the pipe wall below the auxiliary gas injection chamber. The optical fiber strain sensor and the microwave concentration sensor are connected to the computer control system as input ends. The recovery system includes a gas-liquid separator, an axial flow turbine generator, an energy storage device, and a silo. The gas-liquid separator has a flat opening and an inclined opening at the bottom. The flat opening is connected to the outlet of the riser pipe, and the inclined opening is connected to the silo through a pipeline. A screen is installed inside the silo. The gas-liquid separator has a gas outlet at the top. The gas outlet is connected to the inlet of the axial flow turbine generator through a pipeline. A hydrophobic and breathable membrane is installed in the pipeline between the gas outlet and the axial flow turbine generator. The output end of the axial flow turbine generator is connected to an energy storage device composed of a supercapacitor bank. The gas-liquid separator adopts a vertical structure design. The top of the separator has a gas outlet directly opposite the outlet of the riser pipe, and the bottom adopts a gradually expanding conical structure. After the mixed fluid enters through the riser pipe, it impacts the hydrophobic and breathable membrane set in the middle of the gas-liquid separator. The gas passes through the filter membrane and is discharged from the top gas outlet. The solid-liquid mixture falls back to the gradually expanding bottom after the impact and slides down the conical surface under the action of gravity to the material bin connected to the bottom. It then passes through the screen to achieve liquid-solid separation. The hydrophobic and breathable membrane is made of polytetrafluoroethylene. The pore size of the hydrophobic and breathable membrane can ensure that the gas can pass through smoothly while effectively blocking the solid and liquid phases from entering the axial flow turbine generator.

2. The airlift pump system for conveying solid particles in underwater mining according to claim 1, characterized in that: The bottom of the hopper is provided with a uniformly distributed microporous structure.

3. The airlift pump system for conveying solid particles in underwater mining according to claim 1, characterized in that: The inclined hole air lift pump is equipped with an annular air injection chamber, with a main air inlet on the side wall, and several upward-angled air injection holes are evenly distributed on the circumferential wall of the chamber.

4. The airlift pump system for conveying solid particles in underwater mining according to claim 3, characterized in that: The number of air injection holes ranges from 30 to 100, the diameter of the air injection holes ranges from 2 to 5 mm, and the inclination angle ranges from 30 to 60°.

5. The airlift pump system for conveying solid particles in underwater mining according to claim 1, characterized in that: The fiber optic strain sensor is used to monitor the lateral amplitude of the riser pipe. When the lateral amplitude exceeds the set threshold, the signal is transmitted to the computer PLC system. At this time, the vibration suppression mode is activated. The computer control system controls the solenoid valve to open and high-pressure high-frequency pulse air is introduced through the auxiliary air injection chamber. The air intake frequency avoids the natural frequency of the pipeline, thereby suppressing the vibration of the pipeline.

6. The airlift pump system for conveying solid particles in underwater mining according to claim 1, characterized in that: The microwave concentration sensor is used to monitor the local solid phase concentration in the riser pipe. When the concentration exceeds the set threshold, the signal is transmitted to the computer PLC system. At this time, the anti-blocking mode is activated, and the computer controls the solenoid valve to adjust to the low-pressure steady flow air intake mode to prevent pipeline blockage.

7. The airlift pump system for conveying solid particles in underwater mining according to claim 1, characterized in that: The energy storage device is an energy storage device composed of supercapacitor banks. The energy storage device converts the recovered gas kinetic energy into electrical energy and stores it to provide auxiliary power supply for various sensors in the system.

8. The airlift pump system for conveying solid particles in underwater mining according to claim 1, characterized in that: The axial flow turbine generator outlet is equipped with a one-way air valve to prevent outside air from flowing back into the gas-liquid separator; the flange connection between the auxiliary air injection chamber and the riser pipe adopts a quick-release structure.

9. The airlift pump system for conveying solid particles in underwater mining according to claim 1, characterized in that: The computer control system uses a PLC controller with built-in multi-mode control algorithms, which can automatically switch between normal operation mode, vibration suppression mode and anti-blocking mode according to sensor signals.

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