Harmless treatment device for dead fish in mariculture net cage

Abstract

The invention discloses a mariculture net cage dead fish harmless treatment device, and belongs to the technical field of aquaculture waste, the treatment device comprises a pretreatment box, a stirring assembly is arranged in the pretreatment box, a first motor for driving the stirring assembly is arranged outside the pretreatment box, an air inlet cover is arranged on the outer side of the pretreatment box, and a through hole communicated with the air inlet cover is formed in the pretreatment box; a filter screen is arranged on the through hole, the air inlet cover is externally connected with a steam input pipeline, and steam is fed into the pretreatment box. The device solves the problems of pathogenic bacteria diffusion, aquaculture sea area pollution and epidemic disease transmission caused by direct discarding of the dead fish in the mariculture net cage, can perform sterilization pretreatment on the treated dead fish, and is small in equipment size, low in cost, high in moving and using flexibility and suitable for offshore sites.

Description

Technical Field

[0001] This invention relates to the field of aquaculture waste technology, specifically to a device for the harmless treatment of diseased and dead fish in marine aquaculture cages. Background Technology

[0002] In marine aquaculture cage farming (such as the farming of economically important fish like large yellow croaker), disease control and waste disposal constrain the industry's sustainable development. Currently, marine aquaculture cages generally face the risk of both emerging and traditional diseases. For example, trypanosomiasis threatens the survival rate of farmed fish, and bacterial resistance is gradually increasing, leading to potential fish deaths during the farming process. However, most farmers or aquaculture operators in the industry currently discard dead fish directly into the sea without any harmless treatment. This is because it is difficult for aquaculture operators to transport dead fish to land for disposal or they lack the facilities to use incineration equipment. While direct disposal reduces processing costs and complexity, the pathogens carried by the dead fish will spread to the aquaculture area as the carcasses decompose, polluting the surrounding waters. Furthermore, the dead fish still contain usable components such as protein and fat, and direct disposal wastes valuable biomass resources.

[0003] Currently, some equipment related to fish processing or waste treatment already exists in the industry. For example, existing patent KR1020210051631A discloses a method for producing organic fertilizer using frozen fish. This invention relates to a method and machine for preparing odorless organic fertilizer by simultaneously performing crushing-micro-crushing-transfer-mixing-granulation processes. Another example is existing patent KR19950026837U, which discloses a fish crusher for fish feed or fish feed from conventional granulators. This invention relates to fish grinding equipment that grinds frozen fish into canned form in a short time, effectively crushing ordinary fish. The device, designed to minimize the load on the equipment, can operate smoothly and reliably during crushing, obviously increasing the mixing operation. However, the equipment in the above technologies is relatively large, has high procurement costs, and relatively low flexibility in use. Moreover, the lack of sterilization and pretreatment stages in existing processing equipment affects the subsequent material processing effect. Summary of the Invention

[0004] The purpose of this invention is to provide a harmless treatment device for diseased and dead fish in marine aquaculture cages, which solves the problems of pathogen spread, marine pollution and disease transmission caused by the direct disposal of diseased and dead fish in marine aquaculture cages. It can perform sterilization pretreatment on the diseased and dead fish, and the equipment is small in size, low in cost, highly mobile and flexible in use, and suitable for marine sites.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a harmless treatment device for dead fish in marine aquaculture cages, including a pretreatment box, a stirring assembly inside the pretreatment box, a first motor for driving the stirring assembly outside the pretreatment box, an air intake hood outside the pretreatment box, a through hole communicating with the air intake hood in the pretreatment box, and a filter screen on the through hole, and a steam input pipeline connected to the outside of the air intake hood to send steam into the pretreatment box. This invention features an air intake hood on the outside of a pretreatment tank, along with connecting holes and filters at the holes. Steam is supplied to the pretreatment tank via a steam input pipe connected to the air intake hood. Simultaneously, a first motor drives a stirring assembly. This allows the steam to diffuse evenly into the tank through the holes, working in conjunction with the stirring assembly to ensure that diseased or dead fish come into full contact with the high-temperature steam. The high temperature kills pathogens, parasites, and other harmful organisms within the fish, thus performing pretreatment. Furthermore, the stirring assembly disrupts the fish tissue, ensuring that the steam fully and completely contacts all parts of the fish, preventing incomplete steam inactivation. More importantly, the steam inactivation during the stirring process enhances the separation effect between the stirring components and the fish meat and oil, solving problems such as fish meat adhering to the stirring components, leading to reduced stirring efficiency, and the accumulation of adhering substances creating dead zones in the steam's action.

[0006] According to one embodiment of the present invention, the bottom of the pretreatment box is provided with a pull-out sealing plate that can be pulled out from the outside, and the inner wall of the pretreatment box has a slot that is slidably connected to the pull-out sealing plate. One end of the pull-out sealing plate is located outside the pretreatment box, and the part of the pull-out sealing plate located inside the pretreatment box is slidably connected to its slot. The slot is provided with a sealing strip to ensure that the bottom of the pretreatment box is sealed and the upper space is separated when the pull-out sealing plate is fully inserted into the slot. This ensures the closed environment required for the pretreatment process of steam sterilization and stirring and crushing fish meat tissue, avoiding steam leakage that affects the sterilization effect and energy waste. At the same time, the pull-out design makes the material transfer operation after pretreatment convenient and efficient. Furthermore, this pull-out structure has a foolproof effect on personnel. That is, after pretreatment, personnel need to send the pretreated material into the receiving box below by pulling out the sealing plate. During this process, if the personnel are conscious of pulling out the sealing plate, they can be reminded to open the pretreatment box to check the pretreatment effect, or they may intentionally not check the material inside the pretreatment box.

[0007] According to one embodiment of the present invention, a receiving box is provided at the bottom of the pretreatment box and communicates with its interior. The receiving box includes a first box communicating with the pretreatment box, and a second box communicating with the bottom of the first box. The flow cross-sectional area of ​​the first box gradually decreases from the connection point of the pretreatment box to the connection point of the second box. The present invention, by providing a communicating receiving box at the bottom of the pretreatment box, with the first and second boxes sequentially connected and the flow cross-sectional area of ​​the first box gradually decreasing from the connection point of the pretreatment box to the connection point of the second box, forms a gradually decreasing guiding channel. This enhances the material's downward momentum, avoids accumulation and blockage, and simultaneously guides the material into the second box and the subsequent screw extruder feed inlet, improving processing efficiency. Furthermore, by setting up the receiving box, the pretreated material enters the screw extruder, meaning that after the pull-out sealing plate is gradually opened, the material is guided by the receiving box to enter the screw extruder instead of entering the screw extruder in large quantities in a short time, avoiding unnecessary blockage and the potential problem of inadequate solid-liquid separation due to excessive processing in a short time by the screw extruder.

[0008] In the solid-liquid separation mode of screw extrusion, the upper part of the pretreatment box can be sealed, and external steam can be continuously delivered through the air inlet hood to improve the smoothness of the material entering the screw extruder from the pretreatment box and the extrusion effect of the screw extruder.

[0009] According to one embodiment of the present invention, a screw extruder is provided at the bottom of the second housing and connected thereto. The feed inlet of the screw extruder is connected to the discharge outlet at the bottom of the second housing.

[0010] According to one embodiment of the present invention, the stirring assembly includes a stirring shaft connected to and driven by a first motor. A first stirring structure is provided around the outer ring of the stirring shaft. The first stirring structure is strip-shaped and spirally arranged around the stirring shaft. The stirring shaft and the first stirring structure are connected by support plates. The first stirring structure is connected to the support plates at both ends of the stirring shaft. The strip-shaped spiral structure of the first stirring structure increases the contact area with the fish meat tissue, achieving efficient and uniform crushing of diseased or dead fish, allowing high-temperature steam to fully penetrate all parts of the material, avoiding sterilization dead zones. The support plates ensure the shape and stable installation of the first stirring structure. Furthermore, the support plates also contribute to the crushing effect on the fish meat tissue.

[0011] According to one embodiment of the present invention, a second stirring structure is provided outside the stirring shaft. The second stirring structure is strip-shaped and spirally surrounds the stirring shaft. The stirring shaft and the second stirring structure are connected by a support plate. The spiral direction of the second stirring structure is opposite to that of the first stirring structure. The second stirring structure is connected to the support plate at the end of the stirring shaft away from the air inlet hood, and the length of the second stirring structure is less than that of the first stirring structure. The second stirring structure is provided on the stirring shaft near the rotating disk, and no second stirring structure is provided on the stirring shaft adjacent to the steam input end.

[0012] This invention employs a second stirring structure with a spiral direction opposite to that of the first stirring structure. When the first motor drives the stirring shaft to rotate, the first stirring structure propels the material spirally in one direction, while the second stirring structure generates a reverse thrust on the material near the rotating disk. This creates a bidirectional shearing force and a circulation effect, breaking the unidirectional flow inertia of the material caused by a single stirring structure. This improves the crushing effect of the material in the pretreatment chamber. Furthermore, the second stirring structure is shorter than the first stirring structure and connected to a support plate far from the air inlet hood. This improves the crushing effect while avoiding interference with steam input, ensuring that the steam entering through the air inlet hood does not obstruct the diffusion path within the pretreatment chamber. This ensures that the steam can smoothly fill the chamber space, and combined with the thorough agitation of the material caused by the bidirectional stirring, allows every part of the material to come into full contact with the high-temperature steam, solving the problem of insufficient local steam penetration.

[0013] The support plates are arranged in a staggered, surrounding manner on the stirring shaft, perpendicular to the shaft axis. Each support plate has a groove at its end, through which the first and / or second stirring structure can pass and be welded to the end of the support plate. This combination of grooves and welding ensures the second stirring structure remains stable under reverse force, preventing deformation or loosening during high-speed stirring. This allows the reverse shear force to be effectively transferred to the material, improving crushing efficiency and uniformity, resulting in smaller, more uniformly crushed particles, which helps reduce accumulation resistance when the material enters the receiving box.

[0014] According to one embodiment of the present invention, a rotating disk is connected to the end of the stirring shaft away from the air intake hood. At least two extension plates are arranged around the side of the rotating disk. A stirring plate is rotatably connected to the end of the extension plate. A groove is formed at the end of the stirring plate. A connecting rod is connected between adjacent stirring plates. The two ends of the connecting rod have sliding blocks that can slide within the groove. The bottom of the stirring plate is connected to the extension plate through a rotating shaft, and the stirring plate, the extension plate, and the surface of the rotating disk are arranged perpendicularly.

[0015] The rotating disc is set perpendicular to the axis of the stirring shaft. The stirring plate is a plate structure, with one end connected to the extension plate through the rotating shaft and the other end having a strip-shaped groove.

[0016] The rotating disk of this invention drives the side-mounted extension plate to perform a circular motion when rotating synchronously with the stirring shaft, thereby pulling the end-connected stirring plate to form a radial stirring trajectory. The stirring plate adopts a plate structure and is perpendicular to the surface of the extension plate and the rotating disk. Compared with a strip structure, this plate has a larger contact area and can generate a stronger impact crushing force on large pieces of diseased or dead fish, solving the problem of low efficiency in crushing large pieces of material by a single strip-shaped stirring structure. When contacting large pieces of material or encountering significant resistance, the stirring plate can rotate flexibly around the rotating shaft, avoiding jamming or structural damage caused by hard resistance. Furthermore, when a single stirring plate rotates due to resistance, it will drive the adjacent stirring plates to adjust their angle synchronously through the connecting rod, avoiding uneven stirring caused by local material accumulation, and at the same time, making the stirring trajectory form a continuous coverage. This eliminates the stirring dead corners on the side edges of the rotating disk, that is, it allows edge materials that are originally difficult to reach to be drawn into the stirring area.

[0017] According to one embodiment of the present invention, a pretreatment box is disposed on a table, and a frame is connected to the bottom of the table. By fixing the pretreatment box to the table, the problem of instability of the pretreatment box, receiving box, screw extruder, etc., caused by unevenness in the offshore cage operation site is solved.

[0018] According to one embodiment of the present invention, the pretreatment tank has an opening at the top and a cover plate corresponding to the opening, and a sealing strip is provided at the edge of the opening at the top of the pretreatment tank. This is used to lock in the high-temperature steam entering through the air inlet hood, avoiding energy waste and leakage risks, and at the same time preventing the spread of odors generated during the treatment of diseased or dead fish from polluting the working environment.

[0019] According to one embodiment of the present invention, a bottom plate is provided at the bottom of the pretreatment box, and a receiving box is provided at the bottom of the bottom plate. The pretreatment box, the bottom plate and the receiving box are interconnected.

[0020] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention uses steam sterilization and stirring to break down fish meat tissue, allowing steam to penetrate all parts of the fish meat tissue, avoiding sterilization dead spots. It also utilizes steam to reduce material adhesion, solving the problem of steam dead spots, ensuring the complete inactivation of pathogens and parasites, and blocking the transmission path of diseases. Furthermore, this invention uses components such as the first chamber and the feeding assembly to control the material release rhythm, preventing a large influx of material into the screw extruder in a short time and ensuring smooth material conveying, achieving continuous and stable equipment operation, and improving processing efficiency. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the device for harmlessly treating diseased and dead fish in marine aquaculture cages according to the present invention. Figure 2 This is a schematic diagram of the pretreatment box structure of the present invention; Figure 3 This is a schematic diagram of the stirring assembly of the present invention; Figure 4 This is a schematic diagram of the connection scheme between the stirring shaft and the first stirring structure and the second stirring structure of the present invention. Figure 5 This is a schematic diagram of the connection scheme between the rotating disk, the stirring plate, and the connecting rod of the present invention. Figure 6 This is a schematic diagram of the connecting rod structure of the present invention; Figure 7 This is a schematic diagram of the connection scheme between the screw extruder and the table of the present invention; Figure 8 This is a schematic diagram of the internal structure of the receiving box of the present invention; Figure 9 This is a schematic diagram of the material feeding component scheme of the present invention; Figure 10 This is a schematic diagram showing the usage status of the marine aquaculture cage disease and dead fish harmless treatment device of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 10. Pretreatment box; 11. First motor; 12. Base plate; 13. Pull-out sealing plate; 14. Air inlet hood; 15. Sealing strip; 20. Receiving box; 21. Second motor; 22. First box; 23. Second box; 24. Mounting plate; 30. Screw extruder; 31. Receiving plate; 32. Liquid outlet pipe; 33. Shell; 34. Belt; 35. Support plate; 36. Rotating shaft; 40. Table; 4 1. Frame; 42. Third motor; 50. Mixing assembly; 51. Mixing shaft; 52. Support plate; 53. First mixing structure; 54. Second mixing structure; 55. Extension plate; 56. Connecting rod; 57. Mixing plate; 58. Rotating disc; 59. Slide groove; 60. Discharge assembly; 61. First bending plate; 62. Second bending plate; 63. Elastic rod; 64. Connecting sleeve; 65. Fixed plate; 66. Discharge shaft. Detailed Implementation

[0024] 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.

[0025] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments. Example 1

[0026] As shown in the attached figure Figure 1 -Appendix Figure 6 Appendix Figure 10 As shown, the harmless treatment device for dead fish in marine aquaculture cages includes a pretreatment box 10, a stirring assembly 50 inside the pretreatment box 10, a first motor 11 for driving the stirring assembly 50 outside the pretreatment box 10, an air inlet hood 14 outside the pretreatment box 10, a through hole communicating with the air inlet hood 14, and a filter screen on the through hole. A steam input pipeline is connected to the outside of the air inlet hood 14 to send steam into the pretreatment box 10. This invention provides an air intake hood 14 on the outside of a pretreatment tank 10, along with a connecting hole and a filter screen at the hole. Steam is then supplied into the pretreatment tank 10 via a steam input pipe connected to the air intake hood 14. Simultaneously, a first motor 11 drives a stirring assembly 50 to operate. In this way, the steam diffuses evenly into the tank through the connecting hole, working in conjunction with the stirring assembly 50 to ensure that the diseased or dead fish come into full contact with the high-temperature steam. The high temperature kills pathogens, parasites, and other harmful organisms in the fish, thus performing pretreatment. Furthermore, the stirring assembly breaks down the fish meat tissue, allowing the steam to fully and completely contact all parts of the fish, avoiding incomplete steam inactivation. More importantly, the use of steam for inactivation during the stirring process can increase the separation effect between the stirring components and the fish meat and oil, solving problems such as fish meat adhering to the stirring components, which reduces the stirring efficiency, and the accumulation of adhering substances creating dead zones for steam action.

[0027] As shown in the attached figure Figure 2As shown, the bottom of the pretreatment box 10 is provided with a pull-out sealing plate 13 that can be pulled out from the outside, and the inner wall of the pretreatment box 10 has a slot that is slidably connected to the pull-out sealing plate 13. One end of the pull-out sealing plate 13 is located outside the pretreatment box 10. The part of the pull-out sealing plate 13 located inside the pretreatment box 10 is slidably connected to its slot, and the slot is equipped with a sealing strip to ensure that the bottom of the pretreatment box 10 is sealed and the upper space is separated when the pull-out sealing plate 13 is fully inserted into the slot. This ensures the closed environment required for the pretreatment process of steam sterilization and stirring and crushing fish meat tissue, avoiding steam leakage that affects the sterilization effect and energy waste. At the same time, the pull-out design makes the material transfer operation after pretreatment convenient and efficient. Furthermore, this pull-out structure also has a foolproof effect on personnel. That is, after pretreatment, personnel need to send the pretreated material into the receiving box 20 below by pulling out the sealing plate 13. During this process, if the personnel are aware of the pull-out action, they can be reminded to open the pretreatment box 10 to check the pretreatment effect, or they may intentionally not check the material inside the pretreatment box 10.

[0028] As shown in the attached figure Figure 7 As shown, the bottom of the pretreatment box 10 is provided with a receiving box 20 that communicates with its interior. The receiving box 20 includes a first box 22 that communicates with the pretreatment box 10. The bottom of the first box 22 is provided with a second box 23 that communicates with it. The flow cross-sectional area of ​​the first box 22 decreases sequentially from the connection point of the pretreatment box 10 to the connection point of the second box 23. This invention provides a receiving box 20 connected to the bottom of the pretreatment box 10. The first box 22 and the second box 23 are connected sequentially, and the cross-sectional area of ​​the first box 22 gradually decreases from the connection point of the pretreatment box 10 to the connection point of the second box 23, forming a gradually decreasing guiding channel. This enhances the falling force of the material and avoids accumulation and blockage. At the same time, it guides the material into the second box 23 and the feed inlet of the subsequent screw extruder 30, improving the processing efficiency. Furthermore, the receiving box 20 acts as a buffer for the pretreated material entering the screw extruder 30. As the pull-out sealing plate 13 is gradually pulled open, the material is guided by the receiving box 20 to enter the screw extruder 30 instead of entering the screw extruder 30 in large quantities in a short time. This avoids unnecessary blockage and the problem of inadequate solid-liquid separation that may occur when the screw extruder 30 processes too much material in a short time.

[0029] In the solid-liquid separation mode of screw extrusion, the upper part of the pretreatment box 10 can be sealed, and external steam can be continuously delivered through the air inlet hood 14 to improve the smoothness of the material entering the screw extruder 30 from the pretreatment box 10 and the extrusion effect of the screw extruder 30.

[0030] As shown in the attached figure Figure 1 Appendix Figure 10As shown, a screw extruder 30 is connected to the bottom of the second housing 23. The feed inlet of the screw extruder 30 is connected to the discharge outlet at the bottom of the second housing 23.

[0031] As shown in the attached figure Figure 2 -Appendix Figure 6 As shown, the stirring assembly 50 includes a stirring shaft 51 connected to and driven by a first motor 11. A first stirring structure 53 is provided around the outer ring of the stirring shaft 51. The first stirring structure 53 is strip-shaped and spirally arranged around the stirring shaft 51. The stirring shaft 51 and the first stirring structure 53 are connected by support plates 52. The first stirring structure 53 is connected to the support plates 52 at both ends of the stirring shaft 51. The strip-shaped spiral structure of the first stirring structure 53 increases the contact area with the fish meat tissue, achieving efficient and uniform crushing of diseased or dead fish, allowing high-temperature steam to fully penetrate all parts of the material, avoiding sterilization dead zones. The support plates 52 ensure the shape and stable installation of the first stirring structure 53. Additionally, the support plates 52 also contribute to the crushing effect on the fish meat tissue.

[0032] A second stirring structure 54 is provided outside the stirring shaft 51. The second stirring structure 54 is strip-shaped and spirally surrounds the stirring shaft 51. The stirring shaft 51 and the second stirring structure 54 are connected by a support plate 52. The spiral direction of the second stirring structure 54 is opposite to that of the first stirring structure 53. The second stirring structure 54 is connected to the support plate 52 at the end of the stirring shaft 51 away from the air intake hood 14, and the length of the second stirring structure 54 is less than that of the first stirring structure 53. (See Appendix) Figure 3 As shown, the second stirring structure 54 is disposed on the stirring shaft 51 near the rotating disk 58, and the second stirring structure 54 is not disposed on the stirring shaft 51 adjacent to the steam input end.

[0033] This invention sets the second stirring structure 54 to have a spiral direction opposite to that of the first stirring structure 53. When the first motor 11 drives the stirring shaft 51 to rotate, the first stirring structure 53 drives the material to spiral forward in one direction, while the second stirring structure 54 generates a reverse thrust on the material near the rotating disk 58. The two form a bidirectional shear force and circulation effect, breaking the unidirectional flow inertia of the material caused by the single stirring structure, thus improving the crushing effect of the material in the pretreatment box 10. Furthermore, the second stirring structure 54 is shorter than the first stirring structure 53 and is connected to the support plate 52 far from the end of the air inlet hood 14. This can improve the crushing effect while avoiding interference with the steam input, that is, it will not block the diffusion path of the steam input from the air inlet hood 14 in the pretreatment box 10, ensuring that the steam can smoothly fill the box space. Combined with the full agitation of the material brought about by the bidirectional stirring, every part of the material can come into full contact with the high-temperature steam, solving the problem of insufficient local steam penetration.

[0034] The support plate 52 is arranged around and staggered on the stirring shaft 51, perpendicular to the axis of the stirring shaft 51. The end of the support plate 52 has a groove, through which the first stirring structure 53 and / or the second stirring structure 54 can pass and be connected to the end of the support plate 52 by welding. The groove and welding method at the end of the support plate 52 ensures that the second stirring structure 54 remains stable under reverse force, preventing deformation or loosening during high-speed stirring. This allows the reverse shear force to be effectively transmitted to the material, improving crushing efficiency and uniformity, resulting in smaller, more uniformly crushed particles, which helps reduce accumulation resistance when entering the receiving box 20.

[0035] A rotating disk 58 is connected to the end of the stirring shaft 51 furthest from the air intake shroud 14. At least two extension plates 55 are arranged around the side of the rotating disk 58. A stirring plate 57 is rotatably connected to the end of each extension plate 55. A groove 59 is formed at the end of each stirring plate 57. A connecting rod 56 connects adjacent stirring plates 57, and both ends of the connecting rod 56 have sliding blocks that can slide within the groove 59. The bottom of the stirring plate 57 is connected to the extension plate 55 via a rotating shaft, and the stirring plate 57, the extension plate 55, and the surface of the rotating disk 58 are arranged perpendicularly. The surface of the rotating disk 58 is perpendicular to the axis of the stirring shaft 51. The stirring plate 57 is a plate structure, with one end connected to the extension plate 55 via a rotating shaft, and the other end having a strip-shaped groove 59.

[0036] The rotating disk 58 of this invention, when rotating synchronously with the stirring shaft 51, drives the side-encircling extension plate 55 to perform circumferential motion, thereby pulling the end-connected stirring plate 57 to form a radial stirring trajectory. The stirring plate 57 adopts a plate structure and is perpendicular to the surface of the extension plate 55 and the rotating disk 58. Compared with a strip structure, the plate has a larger contact area, which can generate a stronger impact crushing force on large pieces of diseased or dead fish, solving the problem of low efficiency in crushing large pieces of material by a single strip-shaped stirring structure. When contacting large pieces of material or encountering significant resistance, the stirring plate 57 can rotate flexibly around the rotating shaft, avoiding jamming or structural damage caused by hard resistance. Furthermore, when a single stirring plate 57 rotates due to resistance, it will drive the adjacent stirring plates 57 to adjust their angle synchronously through the connecting rod 56, avoiding uneven stirring caused by local material accumulation, and at the same time, allowing the stirring trajectory to form a continuous coverage. This eliminates the stirring dead corners on the side edges of the rotating disk 58, that is, it allows edge materials that are originally difficult to reach to be drawn into the stirring area.

[0037] As shown in the attached figure Figure 7 As shown, the pretreatment box 10 is set on the table 40, and the bottom of the table 40 has a frame 41 connected to it. By fixing the pretreatment box 10 on the table 40, the problem of instability of the pretreatment box 10, the receiving box 20, the screw extruder 30, etc., caused by unevenness of the offshore cage operation site is solved.

[0038] As shown in the attached figure Figure 2 As shown, the pretreatment tank 10 has an opening at the top and a cover plate corresponding to the opening. A sealing strip 15 is provided at the edge of the opening at the top of the pretreatment tank 10. This is used to lock in the high-temperature steam entering through the air inlet hood 14, avoiding energy waste and leakage risks, and also preventing the spread of odors generated during the treatment of diseased or dead fish from polluting the working environment.

[0039] The pretreatment box 10 has a bottom plate 12 at the bottom, and a receiving box 20 is provided at the bottom of the bottom plate 12. The pretreatment box 10, the bottom plate 12 and the receiving box 20 are interconnected. Example 2

[0040] See appendix Figure 7 As shown, in this embodiment, the discharge port of the screw extruder 30 is divided into a solid material discharge end and a liquid material discharge end. A receiving plate 31 for guiding the falling direction of solid material is provided at the solid material discharge end, and a liquid discharge pipe 32 for discharging liquid material is provided at the liquid material discharge end.

[0041] See appendix Figure 1 As shown, a third motor 42 is mounted on the frame 41. The screw extruder 30 includes a housing 33, which houses a screw extrusion mechanism and a power transmission shaft 36. A transmission disc is provided at the end of the shaft 36, and the transmission disc is connected to the shaft 36 by a key. The surface of the transmission disc has an annular groove, which is connected to the third motor 42 by a belt 34. Furthermore, a support plate 35 connected to the table 40 is provided outside the housing 33 to ensure the installation level of the screw extruder 30.

[0042] The inactivated product is obtained through solid-liquid separation. The specific products are meat and bone meal and oil-water mixture. The meat and bone meal is used as a raw material for fertilizer or feed preparation, and the oil-water mixture is used for subsequent separation of oil to obtain biodiesel feedstock. Example 3

[0043] In this embodiment, see Appendix Figure 1 Appendix Figure 7 Appendix Figure 8 and appendix Figure 9As shown, a vertical mounting plate 24 is provided on the outside of the first housing 22, and a second motor 21 is provided on the mounting plate 24. A feeding assembly 60 is provided inside the second housing 23. The feeding assembly 60 includes a feeding shaft 66 connected to the second motor 21. A connecting sleeve 64 is sleeved on the feeding shaft 66 and connected to it by a key. Two opposing fixed plates 65 are arranged on the outside of the connecting sleeve 64. The fixed plates 65 are strip-shaped plates and are arranged parallel to the axes of the connecting sleeve 64 and the feeding shaft 66. A first bent plate 61 is connected to one fixed plate 65 and a second bent plate 62 is connected to the other fixed plate 65. Both the first bent plate 61 and the second bent plate 62 are bent around the feeding shaft 66. The first bent plate 61 and the second bent plate 62 are connected by an elastic rod 63.

[0044] A second motor 21 is fixed to the outside of the first housing 22 by an mounting plate 24, driving the feeding assembly 60 inside the second housing 23. The feeding shaft 66, in conjunction with the keyed connecting sleeve 64, drives the two opposing fixed plates 65 and the bent first and second bent plates 62 to rotate. The two are connected by an elastic rod 63, forming an adaptive feeding structure. When the bent first and second bent plates 61 and 62 rotate, they can forcefully push the material. The elastic rod 63 can extend and retract according to the material resistance, avoiding hard blockage. Combined with the guiding effect of the reduced cross-sectional area of ​​the first housing 22, the material is evenly and smoothly conveyed to the feed inlet of the screw extruder 30, solving the problem of incomplete separation caused by short-term material congestion.

[0045] It should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention.

[0047] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A device for harmless treatment of dead fish in a mariculture net cage, comprising a pretreatment tank (10), wherein a stirring assembly (50) is arranged, and a first motor (11) is arranged outside the pretreatment tank (10) to drive the stirring assembly (50), characterized in that, The pre-treatment box (10) is externally provided with an air inlet cover (14), the pre-treatment box (10) is provided with a through hole in communication with the air inlet cover (14), and a filter screen is arranged on the through hole; the air inlet cover (14) is externally connected with a steam input pipeline to send steam into the pre-treatment box (10).

2. The device for safe disposal of dead fish from a sea cage according to claim 1, characterized in that The inner bottom of the pre-treatment box (10) is provided with a pullable sealing plate (13), and the inner wall of the pre-treatment box (10) is provided with a slot in sliding connection with the pullable sealing plate (13).

3. The fish dead disposal device for sea cage culture according to claim 1, characterized in that, The bottom of the pre-treatment box (10) is provided with a material receiving box (20) in communication with the interior of the pre-treatment box (10), the material receiving box (20) comprises a first box (22) in communication with the pre-treatment box (10), the bottom of the first box (22) is provided with a second box (23) in communication therewith, and the flow passage cross-sectional area of the first box (22) gradually decreases from the connection position of the pre-treatment box (10) to the connection position of the second box (23).

4. The device for safe disposal of dead fish from a sea cage according to claim 3, characterized in that The bottom of the second box (23) is provided with a spiral extruder (30) connected therewith.

5. The fish dead disposal device for sea ranching net cage according to claim 1 or 4, characterized in that, The stirring assembly (50) comprises a stirring shaft (51) connected with and driven by the first motor (11), the outer ring of the stirring shaft (51) is provided with a first stirring structure (53), the first stirring structure (53) is in the form of a strip and spirally arranged around the stirring shaft (51), and the stirring shaft (51) and the first stirring structure (53) are connected through a support clamping plate (52).

6. The device for safe disposal of dead fish from a sea cage according to claim 5, characterized in that The stirring shaft (51) is externally provided with a second stirring structure (54), the second stirring structure (54) is in the form of a strip and spirally arranged around the stirring shaft (51), the stirring shaft (51) and the second stirring structure (54) are connected through a support clamping plate (52), and the spiral direction of the second stirring structure (54) is opposite to that of the first stirring structure (53).

7. The fish dead disposal device for sea cage culture according to claim 5, characterized in that, The end of the stirring shaft (51) away from the air inlet cover (14) is connected with a rotating disc (58), at least two extension plates (55) are arranged around the side surface of the rotating disc (58), the end of each extension plate (55) is rotatably connected with a stirring plate (57), the end of each stirring plate (57) is provided with a sliding groove (59), and adjacent stirring plates (57) are connected with a connecting rod body (56), the two ends of the connecting rod body (56) are provided with sliding blocks capable of sliding in the sliding grooves (59).

8. The fish dead disposal device for sea ranching net cage according to claim 1 or 4, characterized in that, The pre-treatment box (10) is arranged on a table top (40), and the bottom of the table top (40) is provided with a frame (41) connected therewith.

9. The fish mortalities disposal device according to claim 1, characterized in that, The pre-treatment box (10) is provided with an opening in the upper portion thereof and a cover plate corresponding to the opening, and a sealing rubber strip (15) is arranged on the edge of the opening in the upper portion of the pre-treatment box (10).

10. The fish dead disposal device for sea ranching net cage according to claim 1 or 3, characterized in that, The bottom of the pre-treatment box (10) is provided with a bottom plate (12), the bottom of the bottom plate (12) is provided with the material receiving box (20), and the pre-treatment box (10), the bottom plate (12) and the material receiving box (20) are in communication with each other.

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