Accelerated sedimentation method for silty-fine sand

Abstract

The invention relates to the technical field of dredging construction, in particular to a fine sand sedimentation acceleration method. The method comprises the following steps that the concentration of fluid entering a mud cabin is monitored, the starting rotating speed of a mud pump is adjusted and controlled in a self-adaptive mode, and the fluid entering the cabin is conveyed into a main cabin; the liquid level in the main cabin is detected, and the operation rotating speed of the dredge pump is regulated and controlled according to the liquid level in the main cabin; when the liquid level in the main cabin rises to the top of the bulkhead corresponding to the main cabin, the main cabin begins to overflow; when it is monitored that the overflow concentration of the main cabin reaches a set concentration value, a gate valve is controlled to convey fluid entering the cabin into near-end auxiliary cabins on the two sides, and meanwhile the rotating speed of a mud pump is switched to return to the starting rotating speed; the in-cabin liquid level of the near-end auxiliary cabin is detected, and when the in-cabin liquid level of the near-end auxiliary cabin rises to the position, corresponding to the top of the bulkhead, of the near-end auxiliary cabin, the near-end auxiliary cabin begins to overflow; and when it is monitored that the overflow concentration of the near-end auxiliary cabin reaches a set concentration value, the gate valve is controlled to execute loading switching. According to the invention, the settlement efficiency and stability of loading operation can be improved.

Description

Technical Field

[0001] This invention relates to the field of dredging construction technology, and in particular to a method for accelerating the settlement of fine sand. Background Technology

[0002] Dredging is a core engineering method for ensuring navigation capacity, promoting coastal reclamation, and watershed ecological restoration. Fine sand, as the main sediment type in channel bottoms and estuary siltation areas, directly determines the project's progress and overall benefits through its loading and settling efficiency. However, due to its small particle size, fine sand is easily suspended in the mud-water mixture for extended periods due to the disturbance of water flow within the dredging tanks of trailing suction hopper dredgers, becoming a key bottleneck restricting dredging efficiency. Traditional dredging of fine sand relies solely on gravity settling, resulting in insufficient settling velocity of fine particles and long loading times, thus extending the vessel's operational cycle.

[0003] Existing technologies for accelerating the settling of fine sand mostly employ methods such as adding energy dissipation boxes or reducing the loading flow velocity. Fixed energy dissipation boxes can only perform localized preliminary energy dissipation on the incoming water flow, and cannot adapt to changes in the flow field under different loading flow rates. Even after energy dissipation, localized high-speed jets still exist within the chamber, which can easily cause secondary disturbance to already deposited particles. While simply reducing the loading flow velocity can reduce flow field disturbance, it leads to a decrease in loading efficiency and is insufficient to improve the settling velocity.

[0004] In summary, existing fine sand loading technology does not take into account the characteristics of fine sand, has a single control method, and has limited effect on accelerating the settling of fine sand. Summary of the Invention

[0005] Therefore, it is necessary for the present invention to provide a method for accelerating the settling of fine sand to solve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, a method for accelerating the settling of fine sand is provided, applied to an accelerated settling device. The accelerated settling device comprises an energy-dissipating guide pipe positioned at the geometric center of the mud tank along the ship's length, guide branch pipes arranged along the energy-dissipating guide pipe, a bulkhead located below the energy-dissipating guide pipe, a gate valve located at the outlet of the guide branch pipe, and sensor units arranged in the upper regions of the inner walls of the main and auxiliary tanks. The method includes the following steps: Step S1: After the mud pump is started, the concentration of the fluid entering the mud chamber is monitored by the sensor unit, and the starting speed of the mud pump is adaptively adjusted so as to transport the fluid entering the chamber to the main chamber through the guide branch pipe. Step S2: Detect the liquid level in the main compartment and adjust the operating speed of the mud pump according to the liquid level in the main compartment; Step S3: When the liquid level in the main compartment rises to the top of the corresponding bulkhead in the main compartment, the main compartment begins to overflow; when the overflow concentration in the main compartment reaches the set concentration value, the fluid entering the compartment is transported to the two near-end auxiliary compartments by controlling the slide valve, and at the same time the mud pump speed is switched back to the starting speed. Step S4: Detect the liquid level in the proximal sub-compartment. When the liquid level in the proximal sub-compartment rises to the top of the corresponding bulkhead in the proximal sub-compartment, the proximal sub-compartment begins to overflow. When the overflow concentration in the proximal sub-compartment reaches the set concentration value, the loading switch is executed by controlling the slide valve.

[0007] This application achieves proactive control over the settling behavior of fine sand during the loading process by constructing a controllable fluid energy distribution and dynamic particle settling adjustment mechanism within the mud tank. In the initial stage of loading, the method utilizes loading pipes and guide branches arranged along the ship's length to form a graded flow path, enabling multi-point diversion and slow release of the incoming mud within the tank, reducing the jet impact intensity from the source. Simultaneously, combined with adjustable-opening gate valves and sensors that monitor the tank's liquid level difference and overflow concentration in real time, the loading flow velocity and flow field distribution are dynamically controlled, thus avoiding secondary disturbance of fine particles by local turbulence without reducing overall transport efficiency. This method can rapidly achieve stratified particle settling under the high suspension characteristics of fine sand, significantly shortening the natural settling time and improving the settling efficiency and stability of the loading operation. Furthermore, through zoned replenishment between the main and auxiliary tanks and adaptive flow velocity adjustment, it achieves graded deposition and energy consumption optimization for different particle size components, ultimately improving the loading efficiency and economic efficiency per unit operation cycle of the trailing suction hopper dredger. Attached Figure Description

[0008] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the steps in the method for accelerating the settling of fine sand according to the present invention; Figure 2 This is a side view schematic diagram of the accelerated settling device in an embodiment of the present invention; Figure 3 This is a top view schematic diagram of the accelerated settling device in an embodiment of the present invention; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0009] The technical method of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0010] Furthermore, the accompanying drawings are merely illustrative of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor methods and / or microcontroller methods.

[0011] It should be understood that although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0012] To achieve the above objectives, please refer to Figures 1 to 3 This invention provides a method for accelerating the settling of fine sand, the method comprising the following steps: Step S1: After the mud pump is started, the concentration of the fluid entering the mud chamber is monitored by the sensor unit, and the starting speed of the mud pump is adaptively adjusted so as to transport the fluid entering the chamber to the main chamber through the guide branch pipe. In this embodiment, fluid is transported to the energy dissipation guide pipe through the loading pipe, and this fluid is used as the inlet fluid. The concentration of the inlet fluid in the mud tank is detected by a sensor unit, which includes a flow rate sensor, a liquid level sensor, and a fluid concentration sensor. After the mud pump starts, the inlet fluid concentration is monitored. When the fluid concentration shows a decreasing trend, that is, the inlet fluid concentration in the mud tank in the next sampling period is less than the inlet fluid concentration in the previous sampling period, the mud pump speed in the previous sampling period is used as the starting speed. After starting correction, the mud pump stably delivers the inlet fluid to the main tank through the guide branch pipe, forming an inlet flow with uniform density and stable flow pattern, providing stable boundary conditions for subsequent liquid level control.

[0013] Step S2: Detect the liquid level in the main compartment and adjust the operating speed of the mud pump according to the liquid level in the main compartment; In a further embodiment, when the level sensor in the main compartment detects a continuous rise in the liquid level inside the compartment, it automatically switches to a level-driven operating speed control mode. The level sensor is installed above the central axis of the main compartment, with a sampling accuracy of ±0.5mm. It calculates the rate of rise of the liquid level in the main compartment and the remaining capacity space in real time through the liquid level signal. The liquid level signal is transmitted to the control terminal for real-time processing. The control terminal has a preset elevation reference value of 1.00m for the top elevation of the corresponding bulkhead in the main compartment. When the level sensor detects that the liquid level in the main compartment is close to the top of the bulkhead during a continuous sampling period, the control terminal immediately issues a deceleration command, gradually reducing the mud pump frequency from 40Hz to 37Hz. Alternatively, if the level sensor detects that the liquid level in the main compartment is not close to the top of the bulkhead during a continuous sampling period, the starting speed is maintained until the liquid level in the main compartment rises to the top elevation of the corresponding bulkhead in the main compartment, at which point the speed is adjusted. The adjustment range of the mud pump's operating speed can be adjusted according to the actual situation, and this application does not impose any limitations.

[0014] Step S3: When the liquid level in the main compartment rises to the top of the corresponding bulkhead in the main compartment, the main compartment begins to overflow; when the overflow concentration in the main compartment reaches the set concentration value, the fluid entering the compartment is transported to the two near-end auxiliary compartments by controlling the slide valve, and at the same time the mud pump speed is switched back to the starting speed. In this embodiment, if the liquid level in the main compartment rises to the top of the corresponding bulkhead, the overflow phase begins. When the overflow concentration consistently reaches the set concentration value (1100) for three consecutive sampling cycles... When the fluid enters the chamber, the control terminal issues a command to open the slide gate valve. The slide gate valve is located on the guide branch pipe to deliver the incoming fluid to the two proximal auxiliary compartments. Simultaneously with the opening of the slide gate valve, the mud pump speed is switched back to the starting speed.

[0015] It is worth noting that this application is based on a reasonable range of references derived from engineering experience and measured data, resulting in 1100. The range of overflow concentration values ​​can be adjusted according to the actual scenario, and this application does not impose any restrictions.

[0016] Step S4: Detect the liquid level in the proximal sub-compartment. When the liquid level in the proximal sub-compartment rises to the top of the corresponding bulkhead in the proximal sub-compartment, the proximal sub-compartment begins to overflow. When the overflow concentration in the proximal sub-compartment reaches the set concentration value, the loading switch is executed by controlling the slide valve.

[0017] In a further embodiment, if the liquid level inside the sub-compartment is detected to rise to 0.88m above the top of the corresponding bulkhead in the near-end sub-compartment, the sub-compartment enters the overflow stage. The overflow concentration sensor signal in the sub-compartment is simultaneously read; when the continuously detected overflow concentration value reaches 1100kJ / m³, the overflow is considered complete. Upon reaching the designated loading point, the loading switching logic is triggered. The control terminal sequentially closes the corresponding gate valve in the near-end auxiliary compartment and opens the valve port in the far-end auxiliary compartment. The initial cross-sectional area of ​​the valve port is set to 30%, and then dynamically expanded to 50% based on the liquid level difference in the far-end auxiliary compartment, thus achieving fluid guidance switching. During this process, the control model calculates the inter-compartment pressure difference and flow velocity matching coefficient in real time to ensure flow diversion stability. After the switching is completed, the main control system marks the near-end auxiliary compartment as fully loaded and begins monitoring the liquid level changes in the far-end auxiliary compartment. When the liquid level in the far-end auxiliary compartment rises to 0.90m and the overflow concentration stabilizes at 1100kJ / m³, the loading switching is initiated. Then, the aforementioned steps are repeated to achieve graded settling and orderly loading from the main compartment to the remote auxiliary compartment, ultimately enabling fine sand to complete gradient deposition and rapid solid-liquid stratification under the synergistic effect of multiple compartments.

[0018] Optionally, a bulkhead located below the energy dissipation guide pipe is arranged laterally along the length of the mud tank, and the bottom of the bulkhead is sealed to the bottom of the mud tank to divide the mud tank into a main tank and a secondary tank; wherein the secondary tanks are divided into near-end secondary tanks and far-end secondary tanks according to the positional relationship between each secondary tank and the main tank.

[0019] Optionally, the adaptive adjustment of the mud pump's starting speed in step S1 includes: At the beginning of each sampling cycle of the sensor unit, the mud pump speed is adjusted, and at the end of the sampling cycle, the concentration of the fluid entering the mud chamber is monitored using the sensor unit. If the concentration of the fluid entering the mud chamber in any sampling period is less than the concentration of the fluid entering the mud chamber in the previous sampling period, then the mud pump speed corresponding to the previous sampling period shall be used as the starting speed. Based on the starting speed, the fluid entering the main compartment is introduced into the main compartment via a mud pump and a guide branch pipe.

[0020] In this embodiment, at the beginning of each sampling cycle (e.g., every 10 seconds), the controller adjusts the mud pump speed. Specifically, the mud pump speed increases by 0.3–0.5 Hz between adjacent sampling cycles to enhance the inflow rate. At the end of each sampling cycle, the sensor unit automatically collects the concentration of the fluid entering the mud chamber. If the concentration of the fluid entering the mud chamber in the next sampling cycle is less than that in the previous sampling cycle, the mud pump speed of the previous sampling cycle is used as the starting speed; that is, the mud pump speed at the point of maximum concentration is determined as the starting speed.

[0021] In a further embodiment, after obtaining the starting speed, the control system drives the mud pump according to the starting speed, and delivers the regulated inlet fluid evenly to the main chamber through the guide branch pipe.

[0022] Optionally, adjusting the operating speed of the mud pump according to the liquid level in the main compartment in step S2 includes: The liquid level in the main compartment is compared and calculated with the top elevation of the corresponding bulkhead in the main compartment. When the liquid level in the main compartment rises to the position of the corresponding bulkhead in the main compartment, a deceleration command is executed according to the preset reduction. The instantaneous rotation speed detected in the next sampling cycle after the deceleration command is executed is taken as the operating speed of the mud pump. If the liquid level in the main compartment does not reach the top elevation of the corresponding bulkhead in the main compartment, maintain the starting speed; In this embodiment, the liquid level signal is transmitted to the control terminal for real-time processing. The distance between the liquid level and the top of the bulkhead determines whether the pump is approaching the top of the bulkhead. When the pump is approaching the top of the bulkhead, the control terminal immediately issues a deceleration command, gradually reducing the mud pump frequency from 40Hz to 37Hz (the preset reduction is 3Hz). After two consecutive sampling cycles, the instantaneous rotational speed detected in the next sampling cycle after the deceleration command is executed is taken as the operating speed of the mud pump.

[0023] In another embodiment, if the liquid level sensor detects that the liquid level in the main compartment has not yet approached the top of the bulkhead during the continuous sampling period, the starting speed is maintained until the liquid level in the main compartment rises to the corresponding top elevation of the bulkhead in the main compartment, at which point the speed is adjusted.

[0024] Optionally, step S3, which involves controlling the gate valves to deliver the inlet fluid to the two proximal auxiliary compartments, includes: When the liquid level in the main compartment rises to the top of the corresponding bulkhead, the main compartment begins to overflow. When the overflow concentration in the main compartment reaches the set concentration value, the control panel valve executes the preset opening command to transport the incoming fluid to the two proximal auxiliary compartments, while the mud pump speed is switched back to the starting speed.

[0025] In this embodiment, if the liquid level sensor in the main compartment detects that the liquid level has risen to the top of the bulkhead (e.g., 2.8m from the bottom of the compartment), it automatically determines that the main compartment has reached the overflow critical state. At this time, the sensor unit collects the concentration change data of the overflow liquid every 2 seconds. If the overflow concentration stably reaches a set threshold (e.g., 1100kJ) for three consecutive monitoring cycles... If the speed is not reached, the control terminal will issue a command to open the gate valve. At the same time, the mud pump speed will be switched back to the starting speed.

[0026] Optionally, performing the load switch in step S4 includes: Once the liquid level in the proximal sub-compartments on both sides reaches the top of the corresponding bulkhead, the proximal sub-compartments begin to overflow. When the overflow concentration in the proximal sub-compartments reaches the set concentration value, the corresponding gate valve in the proximal sub-compartment is closed and the corresponding gate valve in the remote sub-compartment is opened to load the remote sub-compartment.

[0027] In this embodiment, the liquid level in the two proximal auxiliary compartments reaches the top of the corresponding bulkhead. At this time, the sensing unit monitors the concentration change of the overflow liquid at a sampling frequency of 1Hz and transmits the monitoring data to the central control unit. If the overflow concentration is stably higher than a set threshold (e.g., 1100) for three consecutive sampling cycles, the system will detect the overflow. If the reading is positive, it indicates that the coarse particle content in the auxiliary compartment is high and the settling is approaching saturation. The control system then issues a valve-controlled switching command. When the switching command is executed, the gate valve located at the connection between the near-end auxiliary compartment and the guide branch pipe is controlled to close. The gate valve closure adopts a staged closing control strategy to avoid sudden pressure changes in the compartment due to instantaneous valve closure. Specifically, the control system first gradually reduces the valve opening to below 10° at a rate of 3° per second, and then closes it completely within 2 seconds, thereby smoothly terminating the fluid flow into the near-end auxiliary compartment. At the same time, when the flow rate in the near-end auxiliary compartment drops to below 0.05 m³ / s and the liquid level change rate in the compartment is below 0.01 m / min, the closure action is confirmed to be complete. While the gate valve in the near-end auxiliary compartment is completely closed, the corresponding gate valve in the far-end auxiliary compartment is activated. The far-end auxiliary compartment is located at the rear end of both sides of the mud tank and is mainly used to receive medium-concentration mud after primary settling. To prevent direct fluid impact on the bilge of the distal compartment, a curved guide section can be installed at the end of the guide branch pipe, and a diffuser outlet nozzle can be provided at the valve port. This allows the fluid to form a diffused flow field before entering the distal auxiliary compartment, reducing the local flow velocity. The initial opening angle of the slide gate valve is set to 15°, which can be adjusted according to the liquid level difference between the distal auxiliary compartment and the main compartment. Implement dynamic adjustments. When When the flow rate is >0.5m, the valve opening increases by 1.5° per second to accelerate the replenishment flow; when When the depth is less than 0.3m, the valve opening is automatically kept constant to achieve balanced loading.

[0028] In another embodiment, a timing feedback loop consisting of level sensors, concentration meters, and flow meters deployed in each compartment is used to correct control commands in real time. If the rate of increase in the liquid level in the remote auxiliary compartment exceeds a preset upper limit (0.04 m / min), the valve opening will be automatically adjusted or the switching command will be temporarily suspended to prevent measurement errors caused by mud backflow or bubble disturbance in the compartment.

[0029] Optionally, the loading pipe is a fluid transport channel located in the upper space of the mud tank, wherein the loading pipe is connected to the area above the main tank via guide branch pipes.

[0030] Optionally, the height of the bulkhead located below the energy dissipation guide tube decreases sequentially to both sides with the energy dissipation guide tube as the central axis.

[0031] Most importantly, the mud tank structure uses 3 to 5 vertical corrosion-resistant steel bulkheads to divide the mud tank along its length into one central main tank and 2 to 4 side auxiliary tanks.

[0032] Optionally, step S4 may be followed by: Detect the liquid level in the remote auxiliary compartment. If the liquid level in the remote auxiliary compartment is lower than the preset liquid level threshold, repeat steps S1 to S2 until the liquid level in the remote auxiliary compartment reaches the preset liquid level threshold, then proceed to step S3.

[0033] In this embodiment, the sensing unit at the remote auxiliary compartment is used to detect the liquid level in the compartment. When the detected value is lower than the preset liquid level threshold (e.g., 2.2m from the bottom of the compartment), it is determined that the compartment is not full. Then, steps S1 to S2 are executed repeatedly until the liquid level in the remote auxiliary compartment reaches the preset liquid level threshold, and then step S3 is executed.

[0034] like Figure 2 The image shown is a side view of the accelerated settling device in an embodiment of the present invention: The energy dissipation guide tube is a square tube located at the geometric center of the mud compartment along the length of the ship. The guide branch pipe is a circular pipe laid on both sides of the energy dissipation guide pipe. It is connected to the area above the main compartment or auxiliary compartment at an angle of about 15° to 30° downwards. It is used to divert and guide the mud fluid, so that it is evenly dispersed along the direction of the compartment wall and the impact of entering the compartment is reduced. The slide gate valve is installed at the connection between the guide branch pipe and the energy dissipation guide pipe. It is used to control the opening and closing status of the branch pipe at different loading stages, so as to switch and adjust the mud fluid transport path between the main compartment and the auxiliary compartment.

[0035] like Figure 3 The image shown is a top view schematic diagram of the accelerated settling device in an embodiment of the present invention: 101 is an energy dissipation guide pipe located at the geometric center of the mud compartment along the length of the ship, and its structure is a square tube; 102 is a bulkhead that serves as a structural element separating the main cabin from the auxiliary cabin. The height of the bulkhead decreases from the middle to both sides to ensure that overflow can reach the adjacent cabin. 103 is a guide branch pipe that can be opened and closed by a slide gate valve. The direction of the guide branch pipe is horizontal and downward at about 15°~30°, and the structure is a round pipe. 104 is the loading pipe that connects to the energy dissipation guide pipe. It is the actual conveying pipeline that introduces external mud fluid into the mud chamber from above, and its structure is a circular pipe.

[0036] The accelerated settling device of this application forms a graded energy dissipation system through a composite arrangement of square and round tubes: the square energy dissipation guide pipe (101) arranged along the length of the ship is located at the geometric center of the mud tank. Its square corner structure generates local vortices and sidewall shear effects before the fluid enters the tank, so that the kinetic energy of the high-speed jet is initially attenuated in the introduction stage; the bulkhead (102) decreases in height from the middle to both sides, so that the overflow process is diffused in the longitudinal direction, further weakening the concentrated impact of the flow field; the guide branch pipe (103) adopts a round tube and is arranged with a downward inclination angle of 15°~30°. The flow direction is close to the bottom of the tank, so as to guide the fluid kinetic energy to the bottom area to form a low turbulent swirling zone and realize the secondary dissipation of energy; the loading pipe (104) vertically inputs mud from the top. Through the diffusion zone connected with the square guide pipe, the jet completes the velocity gradient differentiation before entering the tank. Under the synergistic effect of this structure, the fluid kinetic energy dissipates step by step along the path of "loading pipe - guide pipe - branch pipe - bottom of the tank", which significantly suppresses the suspension disturbance of fine sand and forms a stable flow field that is conducive to accelerating settling.

[0037] It is worth noting that the entire process of this application can be briefly summarized as follows: the mud pump starts to load the chamber, the fluid concentration rises, and the concentration decreases as detected. The mud pump speed of the previous sampling cycle is then used as the starting speed. Loading continues, and when a certain liquid level is reached (usually near the top of the bulkhead), the mud pump begins to decelerate to reduce upper disturbance. Loading continues, and when the liquid level reaches the top of the bulkhead, overflow begins. When the overflow concentration reaches the set value, the auxiliary chamber loading is switched, and the mud pump is switched back to the starting speed. The above process is repeated.

[0038] Therefore, the embodiments should be considered as exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the application are intended to be included within the invention.

[0039] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A method for accelerating the settling of fine sand, characterized in that, An accelerated settling device is used, comprising an energy dissipation guide pipe positioned at the geometric center of the mud tank along the ship's length, guide branch pipes arranged along the energy dissipation guide pipe, a bulkhead located below the energy dissipation guide pipe, a gate valve located at the outlet of the guide branch pipe, and sensor units arranged in the upper region of the inner walls of the main and auxiliary tanks; the method includes the following steps: Step S1: After the mud pump is started, the concentration of the fluid entering the mud chamber is monitored by the sensor unit, and the starting speed of the mud pump is adaptively adjusted so as to transport the fluid entering the chamber to the main chamber through the guide branch pipe. Step S2: Detect the liquid level in the main compartment and adjust the operating speed of the mud pump according to the liquid level in the main compartment; Step S3: When the liquid level in the main compartment rises to the top of the corresponding bulkhead in the main compartment, the main compartment begins to overflow; when the overflow concentration in the main compartment reaches the set concentration value, the fluid entering the compartment is transported to the two near-end auxiliary compartments by controlling the slide valve, and at the same time the mud pump speed is switched back to the starting speed. Step S4: Detect the liquid level in the proximal sub-compartment. When the liquid level in the proximal sub-compartment rises to the top of the corresponding bulkhead in the proximal sub-compartment, the proximal sub-compartment begins to overflow. When the overflow concentration in the proximal sub-compartment reaches the set concentration value, the loading switch is executed by controlling the slide valve.

2. The method for accelerating the settling of fine sand according to claim 1, characterized in that, The bulkhead located below the energy dissipation guide pipe is arranged laterally along the length of the mud tank. The bottom of the bulkhead is sealed to the bottom of the mud tank to divide the mud tank into the main compartment and the auxiliary compartment. Based on their positional relationship with the main cabin, the auxiliary cabins are divided into near-end auxiliary cabins and far-end auxiliary cabins.

3. The method for accelerating the settling of fine sand according to claim 2, characterized in that, The adaptive adjustment of the mud pump's starting speed in step S1 includes: At the beginning of each sampling cycle of the sensor unit, the mud pump speed is adjusted, and at the end of the sampling cycle, the concentration of the fluid entering the mud chamber is monitored using the sensor unit. If the concentration of the fluid entering the mud chamber in any sampling period is less than the concentration of the fluid entering the mud chamber in the previous sampling period, then the mud pump speed corresponding to the previous sampling period shall be used as the starting speed. Based on the starting speed, the fluid entering the main compartment is introduced into the main compartment via a mud pump and a guide branch pipe.

4. The method for accelerating the settling of fine sand according to claim 2, characterized in that, Step S2, which involves adjusting the operating speed of the mud pump based on the liquid level in the main compartment, includes: The liquid level in the main compartment is compared and calculated with the top elevation of the corresponding bulkhead in the main compartment. When the liquid level in the main compartment rises to the position of the corresponding bulkhead in the main compartment, a deceleration command is executed according to the preset reduction. The instantaneous rotation speed detected in the next sampling cycle after the deceleration command is executed is taken as the operating speed of the mud pump. If the liquid level in the main compartment does not reach the top elevation of the corresponding bulkhead in the main compartment, the starting speed shall be maintained.

5. The method for accelerating the settling of fine sand according to claim 1, characterized in that, Step S3, which involves controlling the gate valves to deliver the inlet fluid to the two proximal auxiliary compartments, includes: When the liquid level in the main compartment rises to the top of the corresponding bulkhead, the main compartment begins to overflow. When the overflow concentration in the main compartment reaches the set concentration value, the control panel valve executes the preset opening command to transport the incoming fluid to the two proximal auxiliary compartments, while the mud pump speed is switched back to the starting speed.

6. The method for accelerating the settling of fine sand according to claim 1, characterized in that, The load switching process in step S4 includes: When the liquid level in the proximal sub-compartments on both sides reaches the top of the proximal sub-compartment bulkhead, the proximal sub-compartment begins to overflow; when the overflow concentration in the proximal sub-compartment reaches the set concentration value, the corresponding gate valve of the proximal sub-compartment is closed and the corresponding gate valve of the remote sub-compartment is opened to carry out the loading of the remote sub-compartment.

7. The method for accelerating the settling of fine sand according to claim 7, characterized in that, The loading pipe is a fluid transport channel located in the upper space of the mud tank, and it is connected to the area above the main tank through guide branch pipes.

8. The method for accelerating the settling of fine sand according to claim 1, characterized in that, The height of the bulkhead located below the energy dissipation guide tube decreases sequentially to both sides with the energy dissipation guide tube as the central axis.

9. The method for accelerating the settling of fine sand according to claim 1, characterized in that, Step S4 is followed by: Detect the liquid level in the remote auxiliary compartment. If the liquid level in the remote auxiliary compartment is lower than the preset liquid level threshold, repeat steps S1 to S2 until the liquid level in the remote auxiliary compartment reaches the preset liquid level threshold, then proceed to step S3.

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