Sediment resuspension simulation device and method under hydrodynamic action

Abstract

The invention provides a device and a method for simulating resuspension of sediments under the action of hydrodynamic force, relates to the field of sediment simulation, and aims to solve the problem that suspended particles are easily broken due to the fact that wave-making type simulation dynamic disturbance is adopted at present. The sediment resuspension process is simulated through water flow sectional type circulation, when the blades with the grating are used for stirring a water body, the grating structure divides the water flow into a plurality of small water flows, so that the acting force of the water flow is dispersed, the originally concentrated impact force is dispersed to all parts of the grating and then is transmitted to suspended particles, the magnitude and the concentration degree of the force are greatly reduced, and the effect is achieved. And the particles are prevented from being broken due to overlarge external force.

Description

Technical Field

[0001] The present invention relates to the field of sediment simulation, and particularly relates to a device and method for simulating sediment resuspension under hydrodynamic action. Background Art

[0002] Sediments are important destinations and repositories for pollutants in rivers. However, affected by hydrodynamic forces, sediments can resuspend to form suspended particulate matter, which can release pollutants again. Suspended particulate matter has a similar structure and composition to sediments, including various particulate inorganic minerals and organic matter. Pollutants can also bind to suspended particulate matter through a series of physical, chemical, and biological processes. More importantly, suspended particulate matter is in direct contact with the overlying water in the river and has a better exchange effect than sediments. Pollutants entering the water may first be adsorbed by suspended particulate matter and undergo complex environmental behaviors under the influence of water chemical conditions, thereby changing the occurrence distribution and ultimate fate of pollutants in the water environment. Therefore, it is of great significance to study the process of sediment resuspension under hydrodynamic action.

[0003] At present, two types of methods, namely in-situ field measurement and indoor simulation, are usually adopted to explore the sediment suspension process under hydrodynamic action. Due to the uncontrollability of the water flow magnitude, as well as the intensity and duration of biological disturbance in field observations, the obtained results often vary randomly to a large extent, which has certain limitations for theoretical analysis. Therefore, it is less applied. In comparison, more indoor simulations are carried out, which are divided into three types of devices: triangular flask type, straight tube type, and flume type. The devices include triangular flasks, cylindrical flumes, annular flumes, and other types of straight flumes. The triangular flask type sediment resuspension device can simulate the sediment resuspension process under natural conditions in the laboratory. By filling a certain amount of sediment and water sample in the triangular flask and generating disturbance through stirring or oscillation, the occurrence of sediment erosion is simulated. In the straight tube type, the sediment is first placed at the bottom, and the water body is disturbed by using an oscillating grid, piston, propeller, etc. to cause the sediment to resuspend and release pollutants. In the annular flume or straight flume, the bottom mud is resuspended by the directional flow of the overlying water body generated by a water pump, a wave maker, and a blower. Among these three methods and devices, the triangular flask type and the straight tube type have quite large limitations because of their limited volume and the significant difference between their hydrodynamic disturbance mechanisms and the actual situation, which cannot reflect the flow field of the real water body and the resuspension and release of sediment pollutants. Therefore, the quantitative relationship between hydrodynamic-sediment resuspension-pollutant release cannot be studied. The flume type is close to the actual situation of natural water bodies. A Chinese patent (publication number CN106840600B, publication date June 13, 2017) discloses an annular flume device for simulating sediment resuspension under the influence of seabed seepage. Different flow velocities of water are generated by a generator and a rotating roller, and the water flow acts on the soil bed in the soil flume, causing the resuspension of the surface sediment. However, in the current flume type simulation method, due to the use of the wave-making type to simulate dynamic disturbance, the overall structure is complex. A closed annular flume needs to be established. The impact of the flow-making roller will cause the water flow to impact the particles and cause them to break, affecting the aggregation of the particles and changing the physical properties of the suspended particles, which does not conform to the state of suspended particles under natural conditions, and the simulation accuracy is poor. Summary of the Invention

[0004] The object of the present invention is to provide a sediment resuspension simulation device and method under hydrodynamic action to address the defects existing in the prior art. By installing baffles in the cavity of the water tank to form multiple sections of flow channels to simulate the water flow action in natural rivers, and using the segmented circulation of the water flow to simulate the sediment resuspension process. When the stirring water body with grid blades, the grid structure divides the water flow into multiple small water flows, so that the water flow force can be dispersed. The originally concentrated impact force is dispersed to each part of the grid. When it is transmitted to the suspended particles again, the magnitude and concentration degree of the force are greatly reduced, preventing the particles from being broken due to excessive external force.

[0005] The first object of the present invention is to provide a sediment resuspension simulation device under hydrodynamic action, adopting the following scheme:

[0006] Comprising:

[0007] A water tank, with a cavity formed inside. A baffle is installed in the cavity, and multiple flow channels divided by the baffle are formed in the cavity;

[0008] An impeller, on which there is at least one grid blade that can rotate with the impeller. Through holes are formed in the grid blade, and the grid blade extends into the cavity and disturbs the water body in the flow channel in a state of being immersed in the water.

[0009] Furthermore, multiple grid blades are provided on the impeller and are sequentially distributed circumferentially around the rotation axis of the impeller.

[0010] Furthermore, the impeller is connected to a driving element through a coupling, enabling relative rotation between the impeller and the water tank.

[0011] Furthermore, the horizontal cross-section of the cavity in the water tank is in the shape of an oblong hole. The baffle includes an arc-shaped baffle and a flat baffle. The flat baffle is distributed perpendicular to the bottom surface of the cavity. Arc-shaped baffles are respectively arranged outside both ends of the flat baffle. Flow channels are formed between the arc-shaped baffle and the flat baffle, between the flat baffle and the inner side surface of the cavity wall, and between the arc-shaped baffle and the inner side surface of the cavity wall.

[0012] Furthermore, the convex surface of the arc-shaped baffle is coaxially distributed with the concave surface at the end of its adjacent oblong hole.

[0013] Furthermore, a sampling nozzle is installed on the water tank. The sampling nozzle communicates with the cavity, and a control valve is installed on the sampling nozzle.

[0014] Furthermore, the top of the cavity is open, and the position where the sampling nozzle communicates with the cavity is below the water surface in the flow channel.

[0015] Furthermore, the through holes are arranged in an array on the grid blade.

[0016] The second object of the present invention is to provide a simulation method for a sediment resuspension simulation device under hydrodynamic action as described in the first object, including:

[0017] Prepare a sufficient amount of overlying water and freeze-dried sediment, lay the sediment at the bottom of the cavity, and slowly pour the overlying water into the water tank;

[0018] The impeller rotates to disturb the water body in the flow channel through the grid blade, simulating hydrodynamic action, adding antibiotics to resuspend the sediment;

[0019] After the test period, take a sample from the cavity and analyze the suspended particulate matter.

[0020] Furthermore, when the grid blade stirs the water body, the grid structure divides the water flow into multiple small water flows, dispersing the water flow force.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0022] Aiming at the problem that the current wave-making type simulation of dynamic disturbance is likely to cause the fragmentation of suspended particles, by installing baffles in the cavity of the water tank to form multi-section flow channels to simulate the water flow in natural rivers, and using the segmented circulation of water flow to simulate the resuspension process of sediments. When the grid blades stir the water body, the grid structure divides the water flow into multiple small water flows, so that the water flow force is dispersed. The originally concentrated impact force is dispersed to each part of the grid. When it is transmitted to the suspended particles, the magnitude and concentration degree of the force are greatly reduced, preventing the particles from being broken due to excessive external force.

[0023] In terms of preventing particle agglomeration, the grid structure makes the water flow around the particles relatively more uniform and stable. When ordinary blades stir, it is easy to form areas with large local water flow velocity differences. The particles will be quickly pushed together under the action of the velocity difference and agglomerate. The uniform water flow of the grid blades can reduce this velocity difference, and the particles move more dispersedly in the water body, reducing the chance of mutual collision and agglomeration. Therefore, it well avoids the change of physical properties of suspended particles such as particle size, surface properties, agglomeration state, etc., and more accurately simulates the state of suspended particles in the natural environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The attached drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0025] Figure 1 It is a schematic diagram after the installation of the sediment resuspension simulation device under hydrodynamic action in Embodiments 1 and 2 of the present invention.

[0026] Figure 2 It is a schematic diagram of the sediment resuspension simulation device under hydrodynamic action in Embodiments 1 and 2 of the present invention.

[0027] Wherein, 1. Water tank; 2. Sampling nozzle; 3. Cavity; 4. Arc-shaped baffle; 5. Flat baffle; 6. Grid blade; 7. Driving element; 8. Control device; 9. Switch; 10. Adjusting knob; 11. Coupling. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Embodiment 1

[0029] In a typical embodiment of the present invention, as Figure 1 - Figure 2 shown, a sediment resuspension simulation device under hydrodynamic action is given.

[0030] In the device for studying sediment resuspension under hydrodynamic action, although the flume simulation is close to the actual situation, the wave-making simulation has a relatively complex dynamic disturbance structure and is likely to affect the physical properties of suspended particles. Based on this, this embodiment provides a sediment resuspension simulation device under hydrodynamic action. A baffle is installed in the cavity 3 of the water tank 1 to form multiple flow channels, and an impeller with grid blades 6 is arranged to simulate the disturbance of the water body, so as to achieve a sediment resuspension simulation closer to the natural river environment, and at the same time avoid the fragmentation of suspended particles due to excessive external force.

[0031] As Figure 1 shown, the sediment resuspension simulation device under hydrodynamic action mainly includes a water tank 1 and an impeller. A cavity 3 is formed inside the water tank 1, and a baffle is installed in the cavity 3. The cavity 3 is divided by the baffle to form multiple shunted flow channels, simulating the water flow conditions in a natural river. The water flow in a natural river is affected by various factors such as the riverbed topography and the shape of the riverbank, and the flow pattern is complex. By setting a baffle in the water tank 1 to form multiple flow channels, the water flow can change in direction, speed, etc. when flowing through different flow channels, forming a complex water flow environment similar to that in a natural river, providing more realistic hydrodynamic conditions for sediment resuspension, and thus more accurately simulating the sediment resuspension process in a natural river.

[0032] At least one grid blade 6 with through holes is provided on the impeller. The grid blade 6 extends into the cavity 3 and immerses in the water body, disturbing the water body in the flow channel when the impeller rotates. During the process of the grid blade 6 rotating to disturb the water body, its grid structure divides the water flow into multiple small water flows. When the water flow passes through the grid, the originally concentrated impact force is dispersed to each part of the grid. Compared with ordinary blades directly stirring the water body, the grid blade 6 disperses the water flow acting force, reduces the impact force of the water flow on the suspended particles, prevents the particles from being broken due to excessive external force, and protects the physical properties of the suspended particles. The through holes on the blade further increase the degree of dispersion and fluidity when the water flow passes through, making the water flow action more uniform.

[0033] Through the multiple flow channels formed by the baffle in the water tank 1, the complex water flow action in a natural river is effectively simulated, which is closer to the resuspension release mechanism of sediment pollutants under the water flow action in a natural river than methods such as the oscillating type, piston type, propeller type, and annular flume. It provides a more realistic hydrodynamic environment for sediment resuspension research, makes the research results more practically valuable, and helps to deeply study the relationship among hydrodynamic - sediment resuspension - pollutant release. The design of the grid blade 6 successfully avoids the fragmentation of suspended particles due to excessive external force, maintains the physical properties of the suspended particles, can accurately simulate the behavior of suspended particles in the natural state, improves the accuracy and reliability of experimental data, is of great significance for studying the interaction between pollutants and suspended particles, etc., and at the same time provides a structural basis for high-quality sediment resuspension research at low cost.

[0034] As Figure 1 shown, a plurality of grid blades 6 are provided on the impeller and are sequentially distributed circumferentially around the rotation axis of the impeller, which can make the disturbance of the blades to the water body more uniform and sufficient. The multiple blades work simultaneously, increasing the contact area and disturbance range with the water body. More water can be driven to flow per unit time, generating a stronger stirring effect. Compared with a single blade, the circumferential distribution of multiple blades can make the water flow receive a more balanced force in all directions, reduce the dead angle of the water flow, and optimize the flow field distribution of the water body. It helps to form a more complex water flow distribution in the water tank 1, strengthens the simulation effect of the sediment resuspension process, improves the accuracy and reliability of the experiment, and makes the experimental results more able to reflect the real situation of sediment resuspension in natural rivers.

[0035] The coupling 11 can connect the impeller and the driving element 7 to achieve power transmission between the two, enabling the impeller to rotate driven by the driving element 7. At the same time, the coupling 11 has the ability to compensate for the deviation between the two shafts. Due to manufacturing errors, installation errors, or thermal expansion of the shaft, etc., the shafts of the driving element 7 and the impeller may not be completely aligned. The coupling 11 can compensate for axial, radial, and angular offsets to ensure smooth power transmission. In addition, the coupling 11 can also absorb vibration and shock, reduce the vibration and noise of the transmission system, protect the driving element 7 and the impeller, and extend the service life of the equipment.

[0036] In this embodiment, the driving element 7 can be a motor. The motor is connected to a controller, and a switch 9 and an adjustment knob 10 are installed on the controller. The start and stop of the motor are controlled by the switch 9, and the adjustment knob 10 can adjust the output speed of the motor, thereby adjusting the rotation speed of the impeller driving the grid blades 6. At the same time, the rotation direction of the impeller can also be adjusted through the controller, ensuring that the impeller can operate stably and reliably, providing a continuous and stable hydrodynamic source for sediment resuspension simulation, guaranteeing the stability of the experimental process, and avoiding deviation of the experimental results caused by transmission problems.

[0037] As Figure 1 and Figure 2As shown in the figure, the horizontal cross-section of the cavity 3 in the water tank 1 is in the shape of an oblong hole, and is equipped with an arc-shaped baffle 4 and a flat baffle 5. The water tank 1 is made of acrylic, which has low cost, corrosion resistance, and can conveniently observe the water flow characteristics and sediment suspension conditions, and various testing instruments and sampling devices can be connected. The flat baffle 5 is perpendicular to the bottom surface of the cavity 3, dividing the cavity 3 in the vertical direction, and a special-shaped flow channel is formed between the arc-shaped baffle 4, the flat baffle 5 and the inner wall side of the cavity 3. When the water flow passes through these flow channels, due to the change of the flow channel shape, the direction and speed of the water flow will be continuously changed. The convex surface of the arc-shaped baffle 4 is coaxially distributed with the concave surface at the end of the adjacent oblong hole. This design makes the water flow more smooth in the arc area, reduces the energy loss and turbulence phenomenon of the water flow, ensures that the water flow flows along the preset path, and further simulates the complex and changeable water flow state in natural rivers. A unique multi-section flow channel is formed, simulating a more similar complex water flow environment to natural rivers, improving the authenticity of the simulation of the sediment resuspension process, and providing more practical experimental conditions for research.

[0038] A sampling nozzle 2 is installed on the water tank 1 and communicated with the cavity 3, and the position of the sampling nozzle 2 is below the water surface in the flow channel, which is convenient for collecting water samples during the operation of the device. Through the control valve on the sampling nozzle 2, the timing and flow rate of water sample collection can be controlled to ensure that representative water samples are collected. Sampling below the water surface can obtain a mixed water sample of overlying water containing suspended particles and particles, which is used for subsequent detection and analysis of various components (such as pollutant concentration, etc.) in the water sample to study the changes of related substances during the sediment resuspension process. It realizes the real-time and convenient collection of water samples during the experimental operation, provides the necessary sample support for studying the migration and transformation of substances during the sediment resuspension process, helps to deeply analyze the experimental data, and draws accurate research conclusions.

[0039] The through holes are arrayed on the grid blades 6, enhancing the dispersion effect of the grid blades 6 on the water flow. When the water flow passes through the through holes with array distribution, it will be divided into more fine water flow bundles, making the water flow more evenly diffuse into the surrounding water body after passing through the blades. This uniform water flow distribution not only reduces the impact force of the water flow on the suspended particles, but also makes the suspended particles in the water body more evenly distributed, reducing the local aggregation phenomenon of the particles.

[0040] Specifically, when the grid blades 6 stir the water body, the grid structure divides the water flow into multiple small water flows, dispersing the water flow force. When the water flow passes through the grid, the originally concentrated impact force is dispersed to each part of the grid. When it is transmitted to the suspended particles, the magnitude and concentration degree of the force are greatly reduced. When the water flow encounters the cross bars and vertical bars of the grid blades 6, it will shunt along the periphery of the bars, avoiding a strong water flow directly impacting the particles. The dispersion effect effectively reduces the impact force of the water flow on the suspended particles, preventing the particles from being broken due to excessive external force. In terms of preventing particle aggregation, the grid structure makes the water flow around the particles relatively more uniform and stable. When ordinary blades stir, it is easy to form areas with large local water flow velocity differences. The particles will be quickly pushed together under the action of the velocity difference and aggregate. The uniform water flow with grid blades 6 can reduce this velocity difference, and the particles move more dispersedly in the water body, reducing the chance of mutual collision and aggregation, thus well avoiding the change of physical properties of suspended particles such as particle size, surface properties, aggregation state, etc., and more accurately simulating the state of suspended particles in the natural environment.

[0041] In this embodiment, when depositing the sediment, by freeze-drying the sediment, the biological activity of the sediment is maintained, and its original shape is also maintained. In addition, the freeze-dried product has a large specific surface area and can be quickly rehydrated.

[0042] Embodiment 2

[0043] In another typical embodiment of the present invention, as Figure 1 Figure 2 shown, a simulation method of a sediment resuspension simulation device under hydrodynamic action is given, using the sediment resuspension simulation device under hydrodynamic action as in Embodiment 1.

[0044] A simulation method of a sediment resuspension simulation device under hydrodynamic action includes:

[0045] Configure sufficient overlying water and freeze-dried sediment, lay the sediment at the bottom of the cavity 3, and slowly pour the overlying water into the water tank 1;

[0046] The impeller rotates to disturb the water body in the flow channel through the grid blades 6 to simulate the hydrodynamic action, add a medicament to suspend the sediment;

[0047] After the test period, take samples from the cavity 3 and analyze the suspended particulate matter.

[0048] When the grid blades 6 stir the water body, the grid structure divides the water flow into multiple small water flows, dispersing the water flow force.

[0049] Embodiment 1:

[0050] Taking the influence of suspended particulate matter on the adsorption of antibiotics under different salinity conditions as an example, the simulation method is described.

[0051] Connect the impeller to the driving element 7 using a coupling 11, connect the driving element 7 to the controller via an electric wire, close all valves, turn off the switch 9, and set the adjustment knob 10 to the 0 scale.

[0052] Prepare sufficient overlying water with different salinities and freeze-dried sediment. Lay the sediment at the bottom of the cavity 3, and slowly pour the overlying water into the box. The height ratio of the sediment to the overlying water is 1:10, and the height of the overlying water should not exceed 2 / 3 of the depth of the cavity 3.

[0053] When simulating hydrodynamic action, turn on the switch 9, rotate the adjustment knob 10 to slowly reach the maximum speed, and after it stabilizes, adjust the antibiotic concentration to 2 mg / L.

[0054] The test is carried out in a 4-hour cycle. After 4 hours, take a mixed water sample of the overlying water and particulate matter from the sampling nozzle 2. After treatment, detect the antibiotic concentration in the water sample by high performance liquid chromatography-tandem mass spectrometry to study the influence of suspended particulate matter on the adsorption of antibiotics under different salinity conditions.

[0055] Embodiment 2:

[0056] Use the simulation method to simulate the influence of sediment on the adsorption of antibiotics under different hydrodynamic conditions.

[0057] Prepare sufficient overlying water, and the overlying water is the prepared 2 mg / L antibiotic solution.

[0058] Mix the freeze-dried sediment and the overlying water at a height ratio of 3:10, and the height of the sediment should not exceed the lowest point of blade rotation.

[0059] Stop after running for 8 hours and take out the reacted sediment

[0060] Adjust the knob to 30 r / min, 60 r / min, and 90 r / min in sequence, and repeat the above steps

[0061] Detect the antibiotic concentration in the water sample before and after the reaction by solid phase extraction-high performance liquid chromatography-tandem mass spectrometry to study the adsorption behavior of sediment on antibiotics under different hydrodynamic conditions.

[0062] Embodiment 3

[0063] Use the simulation method to explore the adsorption mechanism of norfloxacin in river sediment.

[0064] Prepare sufficient overlying water, and the overlying water is a CaCl 2 solution with a concentration of 0.01 mol / L, and the norfloxacin concentration is 5 mg / L.

[0065] Appropriately take the freeze-dried sediment and lay it at the bottom, add overlying water, adjust the rotation speed to an appropriate value to make the sediment concentration reach 10 g / L.

[0066] The temperature is at room temperature, the rotation speed is 90 r / min, and the sampling times are set as 1 h, 2 h, 4 h, 6 h, 8 h, 12 h, 24 h, 36 h, and 48 h in sequence.

[0067] Detect the concentration of norfloxacin in the water sample by solid-phase extraction-liquid chromatography tandem mass spectrometry.

[0068] Fitting equation: The experimental data are fitted by the pseudo-first-order, pseudo-second-order kinetics, and intra-particle diffusion models to obtain the adsorption kinetic parameters, and the adsorption mechanism is explained through the kinetic parameters. The adsorption kinetic models are as follows:

[0069] Pesudo-first-order kinetics model:

[0070] ln(q e -q t 0 = lnq e -k 1 t

[0071] Taking the logarithm of both sides gives:

[0072]

[0073] q t (mg / g) and q e (mg / g) are the solid-phase concentrations of the solute at time t and at adsorption equilibrium, respectively; k 1 (h-1) is the rate constant of pseudo-first-order adsorption.

[0074] Pesudo-second-order kinetics model:

[0075]

[0076] Taking t / q t as y and t as x gives:

[0077]

[0078] k 2 (mg / (kg·h)) is the rate constant of pseudo-second-order adsorption.

[0079] Intra-particlediffusion model:

[0080] qt = k p t 1 / 2 + C

[0081] k p (mg / (kg·h1 / 2)) is the intraparticle diffusion rate constant.

[0082] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for simulating sediment resuspension under hydrodynamic action, characterized in that: include: The water tank has a chamber formed inside, a baffle is installed in the chamber, and a plurality of flow channels divided by the baffle are formed in the chamber; The impeller is provided with at least one grille blade capable of rotating with the impeller, the grille blade is provided with a through hole, the grille blade protrudes into the cavity and disturbs the water in the flow channel in a state of being immersed in the water.

2. The sediment resuspension simulation device under hydrodynamic action according to claim 1, characterized in that: The impeller is provided with a plurality of grille blades, which are distributed in sequence in an upward direction around the impeller's rotation axis.

3. The sediment resuspension simulation device under hydrodynamic action according to claim 1 or 2, characterized in that: The impeller is connected to the driving element through a coupling so that the impeller and the water tank can rotate relative to each other.

4. The sediment resuspension simulation device under hydrodynamic action as claimed in claim 1, characterized in that: The horizontal section of the cavity in the water tank is in the shape of an oblong hole. The baffle includes an arc-shaped baffle and a flat baffle. The flat baffle is distributed perpendicular to the bottom surface of the cavity. Arc-shaped baffles are arranged outside the two ends of the flat baffle respectively. Flow channels are formed between the arc-shaped baffle and the flat baffle, between the flat baffle and the side surface of the inner wall of the cavity, and between the arc-shaped baffle and the side surface of the inner wall of the cavity.

5. The device for simulating sediment resuspension under hydrodynamic action as claimed in claim 4, characterized in that: The outer convex surface of the arc-shaped baffle is coaxially distributed with the inner concave surface of the end portion of the adjacent oblong hole.

6. The device for simulating sediment resuspension under hydrodynamic action according to claim 1, characterized in that: A sampling nozzle is installed on the water tank, the sampling nozzle is connected to the cavity, and a control valve is installed on the sampling nozzle.

7. The device for simulating sediment resuspension under hydrodynamic action according to claim 6, characterized in that: The top of the cavity is open, and the position where the sampling nozzle is connected to the cavity is below the water surface in the flow channel.

8. The device for simulating sediment resuspension under hydrodynamic action according to claim 1, characterized in that: The through holes are distributed in an array on the grille blades.

9. A method for simulating a sediment resuspension simulation device under the action of hydrodynamic force, using the sediment resuspension simulation device under the action of hydrodynamic force as claimed in any one of claims 1 to 8, characterized in that: include: Prepare sufficient overlying water and freeze-dried sediment, spread the sediment at the bottom of the chamber, and slowly pour the overlying water into the water tank; the impeller rotates through the grille blades to disturb the water in the flow channel to simulate the hydrodynamic effect, and antibiotics are added to resuspend the sediment; after the test period, samples are taken from the chamber and the suspended particles are analyzed.

10. The simulation method of the sediment resuspension simulation device under hydrodynamic action according to claim 9, characterized in that: When the grille blades stir the water, the grille structure divides the water flow into multiple small streams, so that the force of the water flow can be dispersed.

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