Marine organism treatment device for cold source water intake

Abstract

The utility model provides a cold source water intake marine organism treatment device which comprises a ship body and a first conveying belt, a collecting bin is arranged on the ship body, the upper end of the first conveying belt is located above the collecting bin, and the lower end of the first conveying belt is arranged in front of a bow; a mounting frame is arranged at the lower end of the first conveying belt, and a cutting roller pair and a cutting piece are arranged on the mounting frame; after the cutting piece cuts off the blockages, the ship body moves forwards to enable the blockages to enter the cutting roller couple, the blockages fall on the first conveying belt after the blockages are cut into small sections by the cutting roller couple, and the first conveying belt conveys the blockages into the collecting bin; after the cutting piece cuts off the blockages, the ship body moves forwards to enable the blockages to enter the cutting roller pair, after the cutting roller pair cuts the blockages into small sections, the blockages fall on the first conveying belt, the first conveying belt conveys the blockages into the collecting bin, and then the blockages are loaded into the collecting bin of the ship body after being cut. And blockages are prevented from blocking the cold source water intake.

Description

Technical Field

[0001] The utility model relates to a debris crushing device, in particular to a cold source water intake marine organism treatment device. Background Art

[0002] The cold source system is an important part of the power production process of thermal power plants, nuclear power plants, etc. Its function is to provide cooling water to the water circulation system and other important water systems of the power plant. The cooling water takes away the heat generated during the operation of the steam turbine generator plant and nuclear island plant system equipment through heat exchange. The cooling water after heat exchange is discharged into the final heat sink through the siphon well.

[0003] The cold source systems currently in operation in my country and the cold source systems of coastal nuclear power plants under construction all adopt a direct cooling water design; the sea area surrounding the plant site is selected as the natural water source and the final heat sink, that is, seawater is directly introduced from the cold source water intake, filtered and discharged back to the surrounding sea area after completing the cooling function.

[0004] The cold source water intake will suck in debris in the seawater at the same time as it sucks in seawater. Excessive inhalation of debris can easily cause the cold source water intake to become blocked, reducing the cooling water inlet flow rate, causing the cold source system to be unable to meet normal cooling needs for related system equipment during the power operation of the nuclear power plant. When the cooling water inlet flow rate is too low, causing the unit drum-net pressure difference to increase and exceed the warning value, it is easy to trigger the unit shutdown protection signal, causing the nuclear power unit to shut down or even a shutdown event, which has an adverse impact on the safety of nuclear power plant operation.

[0005] In recent years, the waters around my country's coastal nuclear power plants have experienced large-scale explosive growth and reproduction of marine organisms such as algae, jellyfish and shrimp. They have gathered near the cold source water intakes and caused blockages in the flow channels. How to solve the problem of blockage in the cold source water intakes has become an urgent issue that needs to be solved.

[0006] Analyzing the specific circumstances of the blockage incidents that have occurred in recent years, the types of blockages at the cold source water intakes of coastal nuclear power plants at home and abroad mainly include marine organisms (algae, jellyfish, shrimps and other types of marine organisms), sand and gravel (sand, silt and gravel), ice and crude oil and other foreign objects. Among them, marine organisms are the main type of blockages, and due to the different marine environments in the sea areas around nuclear power plants, the marine organisms that cause blockages at cold source water intakes also have different population characteristics. According to the World Association of Nuclear Operators (WANO)'s survey and analysis of cold source water intake blockage incidents that occurred in coastal nuclear power plants around the world from 2004 to 2015, more than 80% of the blockage incidents have an adverse impact on the normal operation of nuclear power plants. The main types of blockages and their proportions are: marine organisms (84%), ice (9%), sand and gravel (5%), crude oil (2%), which shows that marine organisms are the primary cause of cold source water intake blockage incidents.

[0007] Based on the specific analysis of the marine organism blockage incidents that have occurred in recent years, it can be concluded that risky marine organisms generally have the following characteristics: First, the blockage risk is seasonal. According to the characteristics of the marine environment in the waters around nuclear power plants, the probability of blockage risk of the same marine organisms is high in the same season of each year. For example, in the South my country Sea, spring and summer are the growth and reproduction periods of the shrimp population, which can easily cause blockage risks to the cold source water intake, and early warning needs to be strengthened; for example, in sea areas with higher latitudes, the growth and reproduction of risky marine organisms caused by the rise in seawater temperature in summer is mainly considered. In sea areas with lower latitudes, the impact of seasonal extreme meteorological conditions on the aggregation of risky marine organisms must also be considered. For example, extreme meteorological conditions such as typhoons and storm surges can easily cause risky marine organisms to rush into the cold source water intake and cause blockage. Second, risky marine organisms have different characteristics in different sea areas. In the northern seas, jellyfish are the main species, while in the southern seas, shrimp and seaweed are the main species.

[0008] In the face of the problem of blockage of the cold source water intake, the existing method of adding a filter at the cold source water intake is not the best solution. Too many obstructions will still clog the filter, requiring frequent replacement or cleaning of the filter, which cannot fundamentally solve the problem.

[0009] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0010] The utility model aims to solve the deficiencies of the prior art and thus provide a cold source water inlet marine biological treatment device capable of clearing the blockage at the cold source water inlet.

[0011] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0012] A marine biological treatment device for a cold source water intake, comprising a hull, wherein a collecting bin for storing blockages and having an open upper portion is provided on the hull, and a first conveyor belt is also provided on the hull, wherein the upper end of the first conveyor belt is located above the opening of the collecting bin, and the lower end of the first conveyor belt is arranged in front of the bow of the hull; a mounting frame is provided at the lower end of the first conveyor belt, and a cutting roller and a cutting blade are sequentially arranged on the mounting frame along the forward direction of the hull; the cutting blade is located at the front end of the mounting frame and is used for cutting or pushing the blockage, and the cutting roller for cutting the blockage into small segments is located in the mounting frame; after the cutting blade cuts off the blockage, the hull moves forward to allow the blockage to enter the cutting roller, and after the cutting roller cuts the blockage into small segments, the blockage falls on the first conveyor belt, and the first conveyor belt transports the blockage to the collecting bin; the first direction is a horizontal direction and is perpendicular to the forward direction of the hull.

[0013] Furthermore, the cutting roller pair is rotatably mounted on the mounting frame along the first direction.

[0014] Furthermore, the cutting blade is a sawtooth blade structure and a plurality of the cutting blades are sequentially arranged on the mounting frame along the first direction.

[0015] Furthermore, a third conveyor belt is provided between the cutting roller pair and the cutting blade, and the third conveyor belt is rotatably mounted on the mounting frame. The rotation of the third conveyor belt can transport the blockage from the cutting blade to the cutting roller pair.

[0016] Furthermore, a crushing roller is rotatably mounted on the mounting frame; the crushing roller, the cutting roller pair and the cutting blade are arranged in sequence along the forward direction of the hull; the crushing roller abuts against the top of the first conveyor belt to crush the blockage on the first conveyor belt; after the cutting roller pair cuts the blockage into small sections, the blockage falls on the first conveyor belt, and the first conveyor belt transports the blockage to the bottom of the crushing roller, so that the crushing roller can crush the blockage, and after the blockage is crushed, the first conveyor belt transports the blockage to the collection bin.

[0017] Furthermore, a second conveyor belt is arranged on the hull, the lower end of the second conveyor belt is located at the bottom of the collecting bin, and the upper end of the second conveyor belt extends above the tail of the hull.

[0018] Furthermore, it also includes a power assembly, which includes a hydraulic pump station, a first hydraulic motor and a second hydraulic motor; the hydraulic pump station provides power for the first hydraulic motor and the second hydraulic motor; the first hydraulic motor is installed on the mounting frame; a first driving gear is provided on the output end of the first hydraulic motor, a first gear set is provided on the end of the rotating shaft of the cutting roller, and the first driving gear is meshed with one of the gears of the first gear set; the second hydraulic motor is installed on the mounting frame, a second driving gear is provided on the output end of the second hydraulic motor, a first passive gear is provided on the end of the rotating shaft of the crushing roller, and the second driving gear is meshed with the first passive gear.

[0019] Furthermore, the power assembly also includes a third hydraulic motor; the hydraulic pump station provides power for the third hydraulic motor; the third hydraulic motor is installed on the mounting frame, and a first driving sprocket is arranged on the output end of the third hydraulic motor, the first conveyor belt has a first driving roller, a belt is sleeved on the first driving roller, a first passive sprocket is arranged on the end of the rotating shaft of the first driving roller, and the first driving sprocket is chain-driven with the first passive sprocket.

[0020] Furthermore, the third conveyor belt has a third driving roller, the third driving roller is sleeved on the belt, a third passive sprocket is arranged on the end of the rotating shaft of the third driving roller, and the third driving sprocket is chain-driven with the first passive sprocket.

[0021] Furthermore, the power assembly also includes a fourth hydraulic motor; the hydraulic pump station provides power for the fourth hydraulic motor; the fourth hydraulic motor is installed on the mounting frame, a second drive sprocket is provided on the output end of the fourth hydraulic motor, the second conveyor belt has a second drive roller, a belt is sleeved on the second drive roller, a second passive sprocket is provided on the end of the rotating shaft of the second drive roller, and the second drive sprocket is chain-driven with the second passive sprocket.

[0022] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model has the following advantages:

[0023] 1. After the cutting blade cuts off the blockage, the ship moves forward to allow the blockage to enter the cutting rollers. After the cutting rollers cut the blockage into small sections, the blockage falls on the first conveyor belt. The first conveyor belt transports the blockage to the collection bin, thereby realizing the cutting of the blockage and loading it into the collection bin of the ship to prevent the blockage from blocking the cold source water intake.

[0024] 2. The crushing roller can crush the chopped blockages, reduce the gaps between the blockages, and then reduce the overall volume of the blockages, so that the collection bin can accommodate more blockages; and the crushing roller and the first conveyor belt squeeze the blockages, and then squeeze out the water in the blockages, reduce the weight of the blockages, and improve the carrying capacity of the collection bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view of the cold source water intake marine biological treatment device of the utility model.

[0026] Figure 2 It is a three-dimensional structural schematic diagram of a cold source water intake marine biological treatment device of the utility model.

[0027] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0028] Figure 4 It is a top view of the cold source water intake marine biological treatment device of the utility model.

[0029] Figure 5 yes Figure 4 Cross-sectional view along the BB axis.

[0030] In the figure:

[0031] 11. Hull; 12. Collection bin; 13. First conveyor belt; 14. Second conveyor belt; 15. Third conveyor belt;

[0032] 21. Mounting frame; 22. Cutting disc; 23. Cutting roller; 24. Crushing roller; 25. Hydraulic pump station. DETAILED DESCRIPTION

[0033] The following is a specific implementation method, combined with Figures 1 to 5 , the technical solution of the utility model is further described in detail.

[0034] A device for treating marine organisms at a cold source water intake, comprising a hull 11, on which is provided a collecting bin 12 for storing blockages and having an open upper portion, and a first conveyor belt 13, the upper end of which is located above the open collecting bin 12, and the lower end of which is located in front of the bow of the hull 11; a mounting frame 21 is provided at the lower end of the first conveyor belt 13, on which a cutting pair of rollers 23 and a cutting blade 22 are sequentially arranged along the forward direction of the hull 11; the cutting blade 22 is located at the front end of the mounting frame 21 and is used to cut off or push off the blockage, for example, the cutting blade 22 can cut off jellyfish, shrimp, water grass, kelp, etc. When there are stones on the seabed, the movement of the hull 11 drives the cutting blade 22 to move, so that the cutting blade 22 pushes the stones to a position away from the cold source water intake; the cutting pair of rollers 23 for cutting the blockage into small sections are located in the mounting frame 21 and above the first conveyor belt 13. The cutting pair of rollers 23 comprises a first roller body and a second roller body, the first roller body and the second roller body are arranged in parallel, first blades are evenly arranged on the outer peripheral surface of the first roller body, the first blades are arranged along the radial direction of the first roller body, second blades are evenly arranged on the outer peripheral surface of the second roller body to engage and cut with the first blades on the outer peripheral surface of the first roller body, and the second blades are arranged along the radial direction of the second roller body; the first roller body and the second roller body rotate so that the first blade and the second blade engage with each other to cut the blockage.

[0035] After the cutting blade 22 cuts off the blockage, the hull 11 moves forward so that the blockage enters the cutting roller 23. After the cutting roller 23 cuts the blockage into small sections, the blockage falls on the first conveyor belt 13. The first conveyor belt 13 transports the blockage to the collecting bin 12, thereby realizing the cutting of the blockage and loading it into the collecting bin 12 of the hull 11 to prevent the blockage from blocking the cold source water intake.

[0036] The first direction is a horizontal direction and is perpendicular to the forward direction of the hull 11 .

[0037] Further, the cutting rollers 23 are rotatably mounted on the mounting frame 21 along the first direction. In some embodiments, the cutting rollers 23 are vertically mounted on the mounting frame 21.

[0038] In one embodiment, the cutting blade 22 is a sawtooth blade structure and a plurality of cutting blades 22 are sequentially arranged along the first direction on the mounting frame 21 .

[0039] In one embodiment, a third conveyor belt 15 is provided between the cutting roller 23 and the cutting blade 22 . The third conveyor belt 15 is rotatably mounted on the mounting frame 21 . The rotation of the third conveyor belt 15 can transport the blockage from the cutting blade 22 to the cutting roller 23 .

[0040] In one embodiment, a crushing roller 24 is rotatably mounted on the mounting frame 21 .

[0041] The crushing roller 24 , the cutting roller pair 23 and the cutting blade 22 are sequentially arranged along the forward direction of the hull 11 ; the crushing roller 24 abuts against the top of the first conveyor belt 13 to crush the blockage on the first conveyor belt 13 .

[0042] After the cutting rollers 23 cut the blockage into small pieces, the blockage falls onto the first conveyor belt 13 , and the first conveyor belt 13 conveys the blockage to the bottom of the crushing rollers 24 so that the crushing rollers 24 can crush the blockage. After the blockage is crushed, the first conveyor belt 13 conveys the blockage to the collection bin 12 .

[0043] The crushing roller 24 can crush the chopped blockages, reduce the gaps between the blockages, and further reduce the overall volume of the blockages, so that the collecting bin 12 can accommodate more blockages; and the crushing roller 24 and the first conveyor belt 13 squeeze the blockages, and further squeeze out the water in the blockages, thereby reducing the weight of the blockages and improving the carrying capacity of the collecting bin 12.

[0044] Furthermore, a second conveyor belt 14 is provided on the hull 11, the lower end of the second conveyor belt 14 is located at the bottom of the collecting bin 12, and the upper end of the second conveyor belt 14 extends above the tail of the hull 11. When the collecting bin 12 is full, the hull 11 is docked at the shore, and the second conveyor belt 14 rotates to transport the blockage in the collecting bin 12 to the shore.

[0045] Furthermore, the cold source water intake marine biological treatment device also includes a power assembly, which includes a hydraulic pump station 25, a first hydraulic motor and a second hydraulic motor.

[0046] The hydraulic pump station 25 provides power for the first hydraulic motor and the second hydraulic motor.

[0047] The first hydraulic motor is installed on the mounting frame 21; a first driving gear is provided on the output end of the first hydraulic motor, and the rotation of the output end of the first hydraulic motor drives the first driving gear to rotate; a first gear set is provided on the end of the rotating shaft of the cutting roller 23, and the first driving gear is meshed with one of the gears of the first gear set. The rotation of the first driving gear drives the first gear set to rotate, and the rotation of the first gear set drives the cutting roller 23 to rotate, so that the cutting roller 23 can cut the blockage into small sections.

[0048] The second hydraulic motor is installed on the mounting frame 21, and a second driving gear is arranged on the output end of the second hydraulic motor. A first passive gear is arranged on the end of the rotating shaft of the crushing roller 24, and the second driving gear is meshed with the first passive gear. The rotation of the second driving gear drives the first passive gear to rotate, and the rotation of the first passive gear drives the crushing roller 24 to rotate, so that the crushing roller 24 can crush the blockage.

[0049] Furthermore, the power assembly also includes a third hydraulic motor; the hydraulic pump station 25 provides power for the third hydraulic motor.

[0050] The third hydraulic motor is mounted on the mounting frame 21, and a first driving sprocket is arranged on the output end of the third hydraulic motor. The first conveyor belt 13 has a first driving roller, and a belt is sleeved on the first driving roller. A first passive sprocket is arranged on the end of the rotating shaft of the first driving roller. The first driving sprocket is chain-driven with the first passive sprocket. The rotation of the first driving sprocket drives the first passive sprocket to rotate. The rotation of the first passive sprocket causes the first driving roller to rotate. The rotation of the first driving roller drives the belt of the first conveyor belt 13 to rotate to transport the blockage.

[0051] Furthermore, the third conveyor belt 15 has a third driving roller, which is sleeved on the belt, and a third passive sprocket is arranged on the end of the rotating shaft of the third driving roller, and the third driving sprocket is chain-driven with the first passive sprocket.

[0052] Furthermore, the power assembly also includes a fourth hydraulic motor; the hydraulic pump station 25 provides power for the fourth hydraulic motor.

[0053] The fourth hydraulic motor is installed on the mounting frame 21, and a second driving sprocket is arranged on the output end of the fourth hydraulic motor. The second conveyor belt 14 has a second driving roller, and a belt is sleeved on the second driving roller. A second passive sprocket is arranged on the end of the rotating shaft of the second driving roller. The second driving sprocket and the second passive sprocket are chain-driven. The rotation of the second driving sprocket drives the second passive sprocket to rotate, and the rotation of the second passive sprocket drives the second driving roller to rotate. The rotation of the second driving roller drives the belt of the second conveyor belt 14 to rotate to transport the blockage.

[0054] For ease of understanding, the use process of the present utility model is described in detail below.

[0055] 1. Harvesting blockages:

[0056] The ship 11 is driven to the area to be cleaned, and the oil pressure pump station is started, and the first hydraulic motor, the second hydraulic motor and the third hydraulic motor are rotated.

[0057] The hull 11 moves forward, so that the cutting blade 22 cuts the blockages such as waterweed, kelp, jellyfish and hair shrimp. The hull 11 continues to move forward so that the blockage after the cutting enters the third conveyor belt 15 in the mounting frame 21.

[0058] The rotation of the third hydraulic motor drives the first driving sprocket to rotate, which drives the first driven sprocket to rotate. The rotation of the first driven sprocket drives the third driven sprocket and the first driving roller to rotate. The third driven sprocket rotates the third driving roller. The rotation of the third driving roller drives the belt of the third conveyor belt 15 to rotate, so that the cut blockage enters the cutting roller 23.

[0059] The rotation of the first hydraulic motor drives the first driving gear to rotate, the rotation of the first driving gear drives the first gear set to rotate, the rotation of the first gear set drives the cutting roller 23 to rotate, so that the cutting roller 23 can cut the blockage into small sections, and the blockage cut into small sections falls onto the belt of the first conveyor belt 13.

[0060] The third hydraulic motor rotates to drive the first driving sprocket to rotate and drive the first driven sprocket to rotate. The rotation of the first driven sprocket causes the first driving roller to rotate. The rotation of the first driving roller drives the belt of the first conveyor belt 13 to convey the blockage to the bottom of the crushing roller 24.

[0061] The second hydraulic motor rotates to drive the second driving gear to rotate, the second driving gear rotates to drive the first driven gear to rotate, the first driven gear rotates to drive the crushing roller 24 to rotate, so that the crushing roller 24 can crush the blockage and squeeze out the water in the blockage.

[0062] The third hydraulic motor continues to rotate, causing the first conveyor belt 13 to convey the crushed blockage to the collecting bin 12 .

[0063] (ii) Pushing the blockage:

[0064] The movement of the hull 11 drives the mounting frame 21 and the cutting blade 22 to move, so that the cutting blade 22 pushes the blockage, and then the cutting blade 22 pushes the blockage to a preset position.

[0065] (III) Unloading:

[0066] The hull 11 moves to the shore, and the fourth hydraulic oil motor is started to rotate the second drive sprocket, which drives the second driven sprocket to rotate, and the second driven sprocket drives the second drive roller to rotate, and the second drive roller drives the belt of the second conveyor belt 14 to rotate, and the belt of the second conveyor belt 14 drives the collected blockage to be discharged from the collection bin 12 to the shore.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A cold source water intake marine biological treatment device, characterized in that: It comprises a hull, on which a collecting bin for storing blockages and having an open upper portion is arranged, and on which a first conveyor belt is also arranged, wherein the upper end of the first conveyor belt is located above the open portion of the collecting bin, and the lower end of the first conveyor belt is arranged in front of the bow of the hull; a mounting frame is arranged at the lower end of the first conveyor belt, and a cutting pair of rollers and a cutting blade are arranged on the mounting frame in sequence along the forward direction of the hull; the cutting blade is located at the front end of the mounting frame and is used to cut off or push the blockage, and the cutting pair of rollers used to cut the blockage into small sections is located inside the mounting frame; After the cutting blade cuts off the blockage, the ship body moves forward to allow the blockage to enter the cutting rollers. After the cutting rollers cut the blockage into small segments, the blockage falls onto the first conveyor belt, and the first conveyor belt conveys the blockage to the collection bin. The first direction is a horizontal direction and is perpendicular to the forward direction of the hull.

2. The cold source water intake marine biological treatment device according to claim 1, characterized in that: The cutting roller pair is rotatably mounted on the mounting frame along the first direction.

3. The cold source water intake marine biological treatment device according to claim 1, characterized in that: The cutting blade is a sawtooth blade structure and a plurality of cutting blades are arranged in sequence along the first direction on the mounting frame.

4. The cold source water intake marine biological treatment device according to claim 1, characterized in that: A third conveyor belt is arranged between the cutting roller pair and the cutting blade. The third conveyor belt is rotatably mounted on the mounting frame. The rotation of the third conveyor belt can transport the blockage from the cutting blade to the cutting roller pair.

5. The cold source water intake marine biological treatment device according to claim 4, characterized in that: A crushing roller is rotatably mounted on the mounting frame; The crushing roller, the cutting roller pair and the cutting blade are arranged in sequence along the forward direction of the ship; the crushing roller abuts against the top of the first conveyor belt to crush the blockage on the first conveyor belt; After the cutting rollers cut the blockage into small segments, the blockage falls onto the first conveyor belt, and the first conveyor belt conveys the blockage to the bottom of the crushing roller so that the crushing roller can crush the blockage. After the blockage is crushed, the first conveyor belt conveys the blockage to the collection bin.

6. The cold source water intake marine biological treatment device according to claim 5, characterized in that: A second conveyor belt is arranged on the hull, the lower end of the second conveyor belt is located at the bottom of the collecting bin, and the upper end of the second conveyor belt extends above the tail of the hull.

7. The cold source water intake marine biological treatment device according to claim 6, characterized in that: It also includes a power assembly, which includes a hydraulic pump station, a first hydraulic motor and a second hydraulic motor; The hydraulic pump station provides power for the first hydraulic motor and the second hydraulic motor; The first hydraulic motor is mounted on the mounting frame; a first driving gear is disposed on the output end of the first hydraulic motor, a first gear set is disposed on the end of the rotating shaft of the cutting roller pair, and the first driving gear is meshed with one of the gears of the first gear set; The second hydraulic motor is mounted on the mounting frame, a second driving gear is arranged on the output end of the second hydraulic motor, a first passive gear is arranged on the end of the rotating shaft of the crushing roller, and the second driving gear is meshed with the first passive gear.

8. The cold source water intake marine biological treatment device according to claim 7, characterized in that: The power assembly also includes a third hydraulic motor; the hydraulic pump station provides power for the third hydraulic motor; The third hydraulic motor is mounted on the mounting frame, a first driving sprocket is arranged on the output end of the third hydraulic motor, the first conveyor belt has a first driving roller, a belt is sleeved on the first driving roller, a first passive sprocket is arranged on the end of the rotating shaft of the first driving roller, and the first driving sprocket is chain-driven with the first passive sprocket.

9. The cold source water intake marine biological treatment device according to claim 8, characterized in that: The third conveyor belt has a third driving roller, which is sleeved on the belt. A third passive sprocket is arranged on the end of the rotating shaft of the third driving roller, and the third passive sprocket is chain-driven with the first passive sprocket.

10. The cold source water intake marine biological treatment device according to claim 7, characterized in that: The power assembly further includes a fourth hydraulic motor; the hydraulic pump station provides power for the fourth hydraulic motor; The fourth hydraulic motor is mounted on the mounting frame, a second driving sprocket is provided on the output end of the fourth hydraulic motor, the second conveyor belt has a second driving roller, a belt is sleeved on the second driving roller, a second passive sprocket is provided on the end of the rotating shaft of the second driving roller, and the second driving sprocket is chain-driven with the second passive sprocket.

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