A marine detection system and method for seawater pollutant detection

Abstract

The application relates to the technical field of marine pollutant detection, in particular to a marine detection system and method for seawater pollutant detection, which comprises a collecting container (1) and a vibration separation barrel (2), the vibration separation barrel (2) is connected with a water suction pump (5) through a first pipeline (4), an inlet valve (3) is arranged on the first pipeline (4), the water suction pump (5) sucks the water body to be detected into the vibration separation barrel (2) through a water inlet pipe (13) extending below the water surface, the collecting container can be disassembled to realize the collection of multiple samples while ensuring the sealing property, the sealing property of the collecting container is realized through a container valve when the collecting container is removed, and better sealing property and more convenient operability are realized through the screw thread connection mode.

Description

Technical Field

[0001] This invention relates to the field of marine pollutant detection technology, specifically to a shipboard detection system and method for detecting seawater pollutants. Background Technology

[0002] In recent years, the monitoring of plastic waste in the ocean has received increasing attention. Microplastics are one type of marine plastic waste, and people have gradually discovered that microplastics in seawater can attach to marine microorganisms or other floating objects, spreading over a wide range and even entering the bodies of marine organisms through the food chain, thus causing even greater harm.

[0003] The concept of microplastics was first proposed by Thompson et al. from the University of Plymouth in the UK in a paper published in the journal *Science* on debris in marine waters and sediments. It refers to plastic fragments and particles with a diameter of less than 5 millimeters. In reality, microplastics range in size from a few micrometers to a few millimeters, and are a mixture of diverse, non-uniform plastic particles, often indistinguishable to the naked eye, and are figuratively called "PM2.5 in the sea." The small size of microplastics means a higher specific surface area (specific surface area refers to the surface area per unit mass of porous solid materials), and a larger specific surface area results in a stronger adsorption capacity. Common microplastic particles can be composed of various materials such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyurethane, polycarbonate, and nylon.

[0004] Microplastics can obstruct the propagation of light in water, and when toxic additives in plastics exist in microplastic form, they are more easily released into the environment, harming organisms and threatening the health and safety of ecosystems. Some of these microplastic particles have a density greater than 1, while others have a density less than 1. Microplastics with a density greater than 1 will settle into sediments after entering water bodies; microplastics with a density less than 1 may also sink to the bottom after microorganisms adhere to their surface. These microplastic pollutants may be ingested by benthic animals, threatening benthic life. Aquatic organisms that ingest microplastics can then harm human health through the food chain. Therefore, microplastics have become a hot research topic for scientists. However, due to their small diameter, microplastic particles in sediments are difficult to collect, and currently there are no particularly good methods or devices for separating them.

[0005] Chinese patent ZL201610959719.7 discloses a method and apparatus for separating microplastics. The method includes: 1) collecting sediments from natural water bodies in the wild; 2) drying or freeze-drying the sediments from the natural water bodies at low temperature to obtain a sample to be treated; 3) adding a density solution to the sample to be treated and stirring thoroughly until the sample is completely suspended in the density solution, and then allowing it to stand to separate into a non-precipitate layer and a sediment layer from top to bottom; 4) extracting the non-precipitate layer and passing it through a filter membrane; the liquid after filtration is reused; the microplastic particles separated by the filter membrane include, but are not limited to, those from sediments in natural water bodies in the wild.

[0006] Chinese patent ZL201710738624.7 discloses a manual microplastic extraction device and method, comprising a separation cylinder, a connecting cylinder, and a mixing cylinder connected sequentially from top to bottom. The separation cylinder, connecting cylinder, and mixing cylinder form a shell structure with only one opening at the top. A valve assembly for controlling fluid flow is provided inside the connecting cylinder. A filter screen for filtering microplastics is provided above or below the valve assembly. Ventilation holes for gas inflow are provided on the wall of the mixing cylinder. The manual microplastic extraction method also relates to sampling in a designated area of ​​the coastal zone, bringing the samples back and drying them; placing the sample and separation liquid into the extraction device, performing operations such as aeration and liquid addition, and then pouring out and drying the precipitated microplastics.

[0007] However, the existing microplastic detection methods mentioned above can only be dried at low temperatures due to the characteristics of microplastics. Therefore, the drying efficiency is low and the time is long. If the method of separating and extracting first and then drying is adopted, the original water volume cannot be recorded. During the separation of microplastics, factors such as water loss will cause inaccurate calibration of the microplastic content in the water. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a marine detection system and method for detecting seawater pollutants. This system can vibrate and separate microplastics attached to sediments, microorganisms, or other solids in seawater, river water, lake water, and other water bodies. This increases the proportion of microplastics per unit volume of water. Furthermore, it significantly shortens the drying time during subsequent low-temperature drying to obtain microplastics. Additionally, it reduces water loss during the vibration separation process, making subsequent calculations of the proportion of microplastics in the water more accurate.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a marine detection system for detecting seawater pollutants, comprising a collection container and a vibrating separation tank. The vibrating separation tank is connected to a water pump via a first pipe. An inlet valve is provided on the first pipe. The water pump draws the water to be tested into the vibrating separation tank through an inlet pipe extending below the water surface. The collection container is disposed at the upper end of the vibrating separation tank via a detachable connection structure. At the connection point between the collection container and the vibrating separation tank, a container valve is provided to connect and disconnect the connection channel between the collection container and the vibrating separation tank. The collection container is also provided with a liquid level scale window for observing the liquid level and a vent valve for discharging air from inside the collection container during the process of pumping water into the vibrating separation tank.

[0010] The vibration separation tank is equipped with a vibration separation mechanism and an ultrasonic generator. The vibration separation mechanism and ultrasonic generator cause the water inside the vibration separation tank to vibrate, causing the adsorbed microplastics in the water to be released from adsorption. The microplastics in the water are buoyed and pass through the connection channel between the collection container and the vibration separation tank, enter the collection container and float on the upper surface of the water.

[0011] The bottom of the vibration separation tank is connected to a second pipe via an outlet valve, and the water is discharged into a water tank through the second pipe after being separated by vibration.

[0012] Furthermore, the detachable connection structure includes an outer sealing sleeve of the container at the bottom of the collection container and an inner sealing sleeve of the separation barrel at the top of the vibration separation barrel. The inner side of the outer sealing sleeve of the container is provided with an internal thread, and the outer side of the inner sealing sleeve of the separation barrel is provided with an external thread.

[0013] The collection container includes a container body, a container valve is disposed between the outer sealing sleeve of the container and the container body, a vent valve is disposed at the top of the container body, and a liquid level scale window is disposed on the side of the container body.

[0014] The container valve enables the collection container to remain sealed when the detachable connection between the collection container and the vibrating separation tank is disconnected.

[0015] Furthermore, the vibrating separation tank includes a separation tank body, and a conical collection plate is provided at the top of the separation tank body. The inner sealing sleeve of the separation tank is detachably connected to the inside of the conical collection plate. When the detachable connection structure between the collection container and the vibrating separation tank is disconnected, the conical collection plate can receive water from the connection channel between the collection container and the vibrating separation tank.

[0016] When the inner sealing sleeve of the separation bucket is removed from the conical collecting plate, the water inside the conical collecting plate can flow into the separation bucket body.

[0017] Furthermore, the vibration separation mechanism includes a vibration generator, a vibration conductor, a support disk, and vibrating rods. The vibration generator is located below the separation tank body. The vibration end of the vibration generator is connected to the vibration conductor. The vibration conductor passes through the bottom surface of the separation tank body and extends into the interior of the separation tank body. A support disk is provided at the top of the vibration conductor. Multiple vibrating rods are provided on the support disk. The vibration generated by the vibration generator can be transmitted to the multiple vibrating rods and cause the water inside the separation tank body to vibrate.

[0018] An ultrasonic generator is installed on the side wall of the separation tank body. The ultrasonic generator emits ultrasonic waves into the interior of the separation tank body, causing the water inside the separation tank body to vibrate.

[0019] Furthermore, the vibration separation barrel, vibration separation mechanism, and water pump are installed inside the hull via a support base, the water tank is placed inside the hull and located below the second pipe, and the water inlet pipe is installed on the outer side of the hull via a pipe hanger.

[0020] Furthermore, the pipe hanger includes an L-shaped support rod, a connecting seat, a connecting crossbar, and a pipe fixing clamp. There are two L-shaped support rods arranged side by side, and the two L-shaped support rods are connected by multiple connecting crossbars. Each connecting crossbar is detachably equipped with a pipe fixing clamp, which fixes the water inlet pipe to the connecting crossbar. The L-shaped support rod is detachably connected to the side wall of the hull through the connecting seat.

[0021] A marine detection system and method for detecting seawater pollutants, comprising the following steps using the aforementioned detection system:

[0022] Step a: Drive the ship into the water area to be tested, install a pipe hanger on the side wall of the ship, and install and fix a water inlet pipe on the pipe hanger so that the water inlet of the water inlet pipe extends into the water to a predetermined depth.

[0023] Step b: Install the collection container on top of the vibrating separator via a detachable connection structure, open the container valve, open the vent valve, place the water tank below the second pipe, and close the outlet valve.

[0024] Step c: After opening the inlet valve, start the water pump to pump the water to be tested into the vibrating separation tank. Observe the liquid level height through the liquid level scale window on the collection container. After reaching the preset height, turn off the water pump and close the inlet valve.

[0025] Step d: Start the vibration generator and ultrasonic generator, and after the water inside the vibration separation tank and the collection container vibrates continuously for a predetermined time, turn off the vibration generator and ultrasonic generator, close the container valve and the vent valve, rotate the collection container to separate the outer sealing sleeve of the container from the inner sealing sleeve of the separation tank, and pour the water inside the connection channel between the collection container and the vibration separation tank into the conical collection tray. After removing the collection container, take a sample and mark it for subsequent microplastic detection.

[0026] Step e: Remove the sealing sleeve inside the separation bucket from the conical collection plate, open the outlet valve, and drain the remaining water inside the vibrating separation bucket into the water tank. After completion, mark the water tank for sampling in preparation for subsequent microplastic detection.

[0027] Furthermore, by removing the pipe fixing clamps and replacing the inlet pipes with different lengths, it is possible to collect water samples from different depths.

[0028] There are multiple collection containers and water tanks. After completing one microplastic collection and marking the collection containers and water tanks, the boat is driven to another location in the water area, and steps b to e are repeated to complete multiple samplings of the water area.

[0029] Compared with the prior art, the present invention provides a marine detection system and method for detecting seawater pollutants, which has the following advantages:

[0030] 1. Due to the plastic properties of microplastic particles in water, only low-temperature drying can be used to extract them. This invention separates the microplastic particles from the attached material through mechanical vibration before low-temperature drying, and uses the buoyancy of the microplastics to collect them on the surface of the water. After collection, low-temperature drying is carried out, which can greatly reduce the amount of water that needs to be removed in the subsequent low-temperature drying, and thus greatly shorten the time required for low-temperature drying.

[0031] 2. The collection container of the present invention can ensure airtightness while facilitating disassembly and assembly for the collection of multiple samples. When the collection container is removed, it is sealed by a container valve, and the threaded connection achieves better sealing and more convenient operation.

[0032] 3. By setting a conical collection plate at the top of the vibrating separation tank, the present invention can collect the water in the connecting channel when the collection container is detached, ensuring the integrity of the collected water sample and providing complete sample data for subsequent overall measurement, calibration and calculation.

[0033] 4. This invention uses a pipe hanger to fix the water inlet pipe, and the detachable fixing structure achieves the fixation of the water inlet pipe. At the same time, it can facilitate the assembly and disassembly of water inlet pipes of different lengths, thereby enabling the collection of water samples at different depths. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the detection system of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the microplastic collection container of the present invention;

[0036] Figure 3 This is a view from another direction of the microplastic collection container of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the microplastic vibration separation barrel of the present invention;

[0038] Figure 5 This is a schematic diagram of the internal structure of the vibration separation barrel of the present invention;

[0039] Figure 6 This is a schematic diagram of the detection system of the present invention installed on the hull;

[0040] Figure 7 This is a schematic diagram of the assembly structure of the water inlet pipe and pipe hanger of the present invention;

[0041] In the diagram: Collection container 1, vent valve 101, container body 102, liquid level scale window 103, container valve 104, container outer sealing sleeve 105, internal thread 106, vibration separation tank 2, separation tank body 201, separation tank inner sealing sleeve 202, external thread 203, conical collection plate 204, inlet valve 3, first pipe 4, water pump 5, outlet valve 6, second pipe 7, vibration separation mechanism 8, vibration generator 801, vibration conductor 802, support disc 803, vibrating rod 804, support base 9, water tank 10, ultrasonic generator 11, hull 12, water inlet pipe 13, pipe hanger 14, L-shaped support rod 141, connecting seat 142, connecting crossbar 143, pipe fixing clamp 144. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] The following is based on the appendix Figure 1-7The present invention provides a marine detection system for detecting seawater pollutants, comprising a collection container 1 and a vibrating separation tank 2. The vibrating separation tank 2 is connected to a water pump 5 via a first pipe 4. An inlet valve 3 is provided on the first pipe 4. The water pump 5 draws the water to be tested into the vibrating separation tank 2 through an inlet pipe 13 extending below the water surface. The collection container 1 is disposed at the upper end of the vibrating separation tank 2 via a detachable connection structure. At the connection point between the collection container 1 and the vibrating separation tank 2, a container valve 104 is provided to connect and disconnect the connection channel between the collection container 1 and the vibrating separation tank 2. The collection container 1 is also provided with a liquid level scale window 103 for observing the liquid level, and a vent valve 101 for discharging air from inside the collection container 1 during the process of drawing water into the vibrating separation tank 2.

[0044] The vibration separation tank 2 is equipped with a vibration separation mechanism 8 and an ultrasonic generator 11. The vibration separation mechanism 8 and the ultrasonic generator 11 cause the water inside the vibration separation tank 2 to vibrate, causing the microplastics adsorbed in the water to be released from adsorption. The microplastics in the water are buoyed and pass through the connection channel between the collection container 1 and the vibration separation tank 2, enter the collection container 1 and float on the upper surface of the water.

[0045] Because the density of microplastics in seawater is less than that of water, microplastic particles float on the surface of the water when they are not adsorbed onto sediments, plankton, or other objects.

[0046] The bottom of the vibration separation tank 2 is connected to the second pipe 7 through the outlet valve 6, and the water is discharged into the water tank 10 through the second pipe 7 after being separated by vibration.

[0047] Furthermore, the detachable connection structure includes an outer sealing sleeve 105 disposed at the bottom of the collection container 1 and an inner sealing sleeve 202 disposed at the top of the vibration separation tank 2. The inner side of the outer sealing sleeve 105 is provided with an internal thread 106, and the outer side of the inner sealing sleeve 202 is provided with an external thread 203. The upper end face of the inner sealing sleeve 202 can also be provided with a sealing groove for accommodating a sealing ring. When the inner sealing sleeve 202 and the outer sealing sleeve 105 are fastened by the threads, the sealing ring can abut against the lower end face inside the outer sealing sleeve 105 to ensure the necessary sealing effect.

[0048] The collection container 1 includes a container body 102, a container valve 104 is disposed between the outer sealing sleeve 105 and the container body 102, a vent valve 101 is disposed at the top of the container body 102, and a liquid level scale window 103 is disposed on the side of the container body 102.

[0049] The container valve 104 can maintain the sealing of the collection container 1 when the detachable connection structure between the collection container 1 and the vibration separation bucket 2 is disconnected.

[0050] Furthermore, the vibrating separation tank 2 includes a separation tank body 201, and a conical collection plate 204 is provided at the top of the separation tank body 201. The inner sealing sleeve 202 of the separation tank is detachably connected to the inside of the conical collection plate 204. When the detachable connection structure between the collection container 1 and the vibrating separation tank 2 is broken, the conical collection plate 204 can receive water from the connection channel between the collection container 1 and the vibrating separation tank 2.

[0051] When the inner sealing sleeve 202 of the separation bucket is removed from the conical collection tray 204, the water inside the conical collection tray 204 can flow into the separation bucket body 201. The inner sealing sleeve 202 of the separation bucket can be connected to the bottom end of the conical collection tray 204 by means of threaded connection in the prior art, while ensuring the necessary sealing.

[0052] Furthermore, the vibration separation mechanism 8 includes a vibration generator 801, a vibration conductor 802, a support disk 803, and vibrating rods 804. The vibration generator 801 is located below the separation tank body 201. The vibration end of the vibration generator 801 is connected to the vibration conductor 802. The vibration conductor 802 passes through the bottom surface of the separation tank body 201 and extends into the interior of the separation tank body 201. The top of the vibration conductor 802 is provided with a support disk 803. Multiple vibrating rods 804 are provided on the support disk 803. The vibration generated by the vibration generator 801 can be transmitted to the multiple vibrating rods 804 and cause the water inside the separation tank body 201 to vibrate.

[0053] An ultrasonic generator 11 is disposed on the side wall of the separation tank body 201. The ultrasonic generator 11 emits ultrasonic waves into the interior of the separation tank body 201, causing the water inside the separation tank body 201 to vibrate.

[0054] Furthermore, the vibration separation tank 2, the vibration separation mechanism 8, and the water pump 5 are installed inside the hull 12 via a support base 9. The water tank 10 is placed inside the hull 12 and located below the second pipe 7. The water inlet pipe 13 is installed on the outer side of the hull 12 via a pipe hanger 14.

[0055] Furthermore, the pipe hanger 14 includes an L-shaped support rod 141, a connecting seat 142, a connecting crossbar 143, and a pipe fixing clamp 144. There are two L-shaped support rods 141 arranged side by side, and the two L-shaped support rods 141 are connected by multiple connecting crossbars 143. Each connecting crossbar 143 is detachably provided with a pipe fixing clamp 144, and the water inlet pipe 13 is fixed to the connecting crossbar 143 by the pipe fixing clamp 144. The L-shaped support rod 141 is detachably connected to the side wall of the hull 12 through the connecting seat 142.

[0056] A marine testing method for detecting seawater pollutants, using the aforementioned testing system, includes the following steps:

[0057] Step a: Drive the hull 12 into the water area to be tested, install a pipe hanger 14 on the side wall of the hull 12, and install and fix a water inlet pipe 13 on the pipe hanger 14, so that the water inlet of the water inlet pipe 13 extends into the water to a predetermined depth.

[0058] Step b: Install the collection container 1 on top of the vibration separation tank 2 via a detachable connection structure, open the container valve 104, open the vent valve 101, place the water tank 10 below the second pipe 7, and close the outlet valve 6.

[0059] Step c: After opening the inlet valve 3, start the water pump 5 to pump the water to be tested into the vibrating separation tank 2. Observe the liquid level height through the liquid level scale window 103 on the collection container 1. After reaching the preset height, turn off the water pump 5 and close the inlet valve 3.

[0060] Step d: Start the vibration generator 801 and the ultrasonic generator 11 to make the water inside the vibration separation tank 2 and the collection container 1 vibrate continuously for a predetermined time. Then, turn off the vibration generator 801 and the ultrasonic generator 11, close the container valve 104 and the vent valve 101, rotate the collection container 1 to separate the outer sealing sleeve 105 of the container from the inner sealing sleeve 202 of the separation tank, and pour the water inside the connection channel between the collection container 1 and the vibration separation tank 2 into the conical collection tray 204. After removing the collection container 1, take samples and mark them for subsequent microplastic detection.

[0061] The total amount of microplastic particles contained in the water in collection container 1 is the content of microplastic particles in all collected water. Therefore, since most of the unnecessary water is removed, only a small amount of water needs to be dried in the subsequent low-temperature drying process, which can shorten the drying time in subsequent testing.

[0062] Step e: Remove the sealing sleeve 202 inside the separation bucket from the conical collection plate 204, open the outlet valve 6, and drain the remaining water inside the vibrating separation bucket 2 into the water tank 10. After completion, mark the water tank 10 for sampling in preparation for subsequent microplastic detection.

[0063] The sum of the water volume in water tank 10 and the water volume in collection container 1 is the total water volume of the collected sample. As the overall sample specimen, it can provide overall and complete data support for subsequent testing.

[0064] Furthermore, by removing the pipe fixing clamp 144 and replacing the water inlet pipe 13 with different lengths, it is possible to collect water samples at different depths.

[0065] There are multiple collection containers 1 and water tanks 10. After completing one microplastic collection and marking the collection containers 1 and water tanks 10, the boat 12 is driven to another position in the water area, and steps b to e are repeated to complete multiple samplings of the water area.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marine detection system for detecting seawater pollutants, comprising a collection container (1) and a vibrating separation tank (2), characterized in that: The vibrating separation tank (2) is connected to the water pump (5) through the first pipe (4). The first pipe (4) is equipped with an inlet valve (3). The water pump (5) draws the water to be tested into the vibrating separation tank (2) through the water inlet pipe (13) that extends below the water surface. The collection container (1) is set at the upper end of the vibrating separation tank (2) through a detachable connection structure. At the connection position between the collection container (1) and the vibrating separation tank (2), a container valve (104) is provided to connect and disconnect the connection channel between the collection container (1) and the vibrating separation tank (2). The collection container (1) is also equipped with a liquid level scale window (103) for observing the liquid level position, and a vent valve (101) for discharging the air inside the collection container (1) during the process of pumping water into the vibrating separation tank (2). The vibration separation tank (2) is equipped with a vibration separation mechanism (8) and an ultrasonic generator (11). The vibration separation mechanism (8) and the ultrasonic generator (11) cause the water inside the vibration separation tank (2) to vibrate, thereby releasing the adsorbed microplastics in the water. The microplastics in the water are buoyed and pass through the connection channel between the collection container (1) and the vibration separation tank (2), enter the collection container (1), and float on the upper surface of the water. The bottom of the vibration separation tank (2) is connected to the second pipe (7) through the outlet valve (6), and the water body is discharged into the water tank (10) through the second pipe (7) after vibration separation. The detachable connection structure includes an outer sealing sleeve (105) of the container (1) at the bottom and an inner sealing sleeve (202) of the separation barrel at the top. The inner side of the outer sealing sleeve (105) is provided with an internal thread (106), and the outer side of the inner sealing sleeve (202) of the separation barrel is provided with an external thread (203). The collection container (1) includes a container body (102), a container valve (104) is disposed between the outer sealing sleeve (105) of the container and the container body (102), a vent valve (101) is disposed at the top of the container body (102), and a liquid level scale window (103) is disposed on the side of the container body (102). The container valve (104) is able to keep the collection container (1) sealed when the detachable connection between the collection container (1) and the vibrating separation bucket (2) is disconnected; The pipe hanger (14) includes an L-shaped support rod (141), a connecting seat (142), a connecting crossbar (143), and a pipe fixing clamp (144). There are two L-shaped support rods (141) arranged side by side. The two L-shaped support rods (141) are connected by multiple connecting crossbars (143). Each connecting crossbar (143) is detachably equipped with a pipe fixing clamp (144). The water inlet pipe (13) is fixed to the connecting crossbar (143) by the pipe fixing clamp (144). The L-shaped support rod (141) is detachably connected to the side wall of the hull (12) by the connecting seat (142).

2. The marine detection system for detecting seawater pollutants according to claim 1, characterized in that: The vibrating separation tank (2) includes a separation tank body (201), and a conical collection plate (204) is provided at the top of the separation tank body (201). The inner sealing sleeve (202) of the separation tank is detachably connected inside the conical collection plate (204). When the detachable connection structure between the collection container (1) and the vibrating separation tank (2) is disconnected, the conical collection plate (204) can receive water inside the connection channel between the collection container (1) and the vibrating separation tank (2). When the inner sealing sleeve (202) of the separation bucket is removed from the conical collection tray (204), the water inside the conical collection tray (204) can flow into the separation bucket body (201).

3. A marine detection system for detecting seawater pollutants according to claim 2, characterized in that: The vibration separation mechanism (8) includes a vibration generator (801), a vibration conductor (802), a support disc (803), and vibrating rods (804). The vibration generator (801) is located below the separation tank body (201). The vibration end of the vibration generator (801) is connected to the vibration conductor (802). The vibration conductor (802) passes through the bottom surface of the separation tank body (201) and extends into the interior of the separation tank body (201). The top of the vibration conductor (802) is provided with a support disc (803). Multiple vibrating rods (804) are provided on the support disc (803). The vibration generated by the vibration generator (801) can be transmitted to the multiple vibrating rods (804) and cause the water inside the separation tank body (201) to vibrate. An ultrasonic generator (11) is disposed on the side wall of the separation tank body (201). The ultrasonic generator (11) emits ultrasonic waves into the interior of the separation tank body (201), causing the water inside the separation tank body (201) to vibrate.

4. A marine detection system for detecting seawater pollutants according to claim 3, characterized in that: The vibration separation barrel (2), vibration separation mechanism (8), and water pump (5) are installed inside the hull (12) via a support base (9). The water tank (10) is placed inside the hull (12) and located below the second pipe (7). The water inlet pipe (13) is installed on the outer side of the hull (12) via a pipe hanger (14).

5. A detection method for a marine detection system for detecting seawater pollutants, using the detection system described in any one of claims 1-4, characterized in that, Includes the following steps: Step a, the hull (12) is driven into the water area to be tested, a pipe hanger (14) is installed on the side wall of the hull (12), and a fixed water inlet pipe (13) is installed on the pipe hanger (14) so ​​that the water inlet of the water inlet pipe (13) extends into the water body to a predetermined depth. Step b, install the collection container (1) on the top of the vibration separation bucket (2) through the detachable connection structure, open the container valve (104), open the vent valve (101), place the water tank (10) below the second pipe (7), and close the outlet valve (6). Step c: After opening the inlet valve (3), start the water pump (5) to pump the water to be tested into the vibrating separation tank (2). Observe the liquid level height through the liquid level scale window (103) on the collection container (1). After reaching the preset height, turn off the water pump (5) and close the inlet valve (3). Step d: Start the vibration generator (801) and ultrasonic generator (11) to make the water in the vibration separation tank (2) and collection container (1) vibrate continuously for a predetermined time. Then, turn off the vibration generator (801) and ultrasonic generator (11), close the container valve (104) and the vent valve (101), rotate the collection container (1) to separate the outer sealing sleeve (105) of the container from the inner sealing sleeve (202) of the separation tank, and pour the water in the connecting channel between the collection container (1) and the vibration separation tank (2) into the conical collection tray (204). After removing the collection container (1), mark the sample for subsequent microplastic detection. Step e: Remove the sealing sleeve (202) inside the separation bucket from the conical collection plate (204), open the outlet valve (6), and drain the remaining water inside the vibrating separation bucket (2) into the water tank (10). After completion, mark the water tank (10) for sampling in preparation for subsequent microplastic detection.

6. The detection method of a marine detection system for detecting seawater pollutants according to claim 5, characterized in that, By removing the pipe fixing clamp (144) and replacing the inlet pipe (13) with one of different lengths, it is possible to collect water samples at different depths. There are multiple collection containers (1) and water tanks (10). After completing one microplastic collection and marking the collection containers (1) and water tanks (10), the boat (12) is driven to another position in the water area, and steps b to e are repeated to complete multiple samplings of the water area.

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