Process for producing agricultural organic fertilizer by aerobic composting of mariculture filter residues

Abstract

The invention provides a process for producing an agricultural organic fertilizer by aerobic composting of mariculture filter residues, belongs to the technical field of agricultural composting, and solves the technical problems of low efficiency, good cost and the like of an existing composting process. The process comprises the following composting steps: step 1, collecting raw materials and removing impurities; step 2, draining and crushing; step 3, mixed desalination treatment; step 4, heating and curing treatment; step 5, transferring the cured material; step 6, composting; step 7, aging; step 8, transferring a semi-finished product material; and step 9, packaging the finished product material. And step 10, storing a finished product. Through intelligent plant layout, modular foundation trench design and automatic equipment integration, space-equipment-process three-dimensional innovation is adopted, efficient resource utilization of mariculture filter residues is achieved, double-robot collaborative operation improves the turning, throwing and material transferring efficiency, the oxygen utilization rate is improved through an intelligent aeration system, and the energy consumption is reduced. Rapid and effective composting of the mariculture filter residues is met, and remarkable environmental protection and economic benefits are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural composting, and relates to a composting process, in particular to a process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue. Background Art

[0002] A certain amount of filter residue is produced during the treatment of marine aquaculture wastewater. The components of the filter residue are mostly the residues of aquaculture feed and fish and shrimp feces, with a certain amount of protein content and trace elements. The current fermentation treatment method has excessively high salt content, which inhibits the fermentation effect. It takes a long fermentation time to kill pathogens and the high salt content is also a problem for subsequent use.

[0003] Reduced waste disposal costs: Traditional methods of treating aquaculture tailwater residue (such as direct discharge or landfill) are not only costly but also environmentally unfriendly. Through resource utilization, the residue can be transformed into high-value-added products, thus saving disposal costs.

[0004] Based on this, we propose a process for aerobic composting of marine aquaculture residue to produce agricultural organic fertilizer. Through intelligent plant layout, modular base tank design and automated equipment integration, we adopt three-dimensional innovation of space-equipment-process to achieve efficient resource utilization of marine aquaculture residue. The collaborative operation of two robots improves the efficiency of turning and transferring materials, and the intelligent aeration system improves oxygen utilization, meeting the requirements of rapid and effective composting of marine aquaculture residue, with significant environmental and economic benefits. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture filter residue. The technical problem to be solved by this invention is: how to achieve efficient resource processing through intelligent plant layout, modular base tank design and automated equipment integration, dual robots working together to improve the efficiency of turning and transferring materials, and an intelligent aeration system to improve oxygen utilization, so as to meet the needs of rapid and effective composting of seawater aquaculture filter residue.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture filter residue comprises the following composting steps: Step 1: Raw material collection and impurity removal: The seawater aquaculture residues from each aquaculture area or factory aquaculture workshop are collected in a timely manner, preliminarily sorted, and impurities are removed. The cleaned aquaculture residues are then transported to the pretreatment and auxiliary material storage of the composting plant; Step 2: Draining and crushing: inject the aquaculture filter residue into a screw conveyor for drainage to control the moisture content of the filter residue, and then inject the drained filter residue into a crusher for crushing to obtain crushed material; Step 3: Mixing and desalting: According to the characteristics of the filter residue, add an appropriate amount of auxiliary materials, and simultaneously convey and mix them through a scraper conveyor and a spiral distributor to obtain a mixed material. The auxiliary materials include but are not limited to biological bacteria, straw, wood chips and rice husks, which improve the air permeability and carbon-nitrogen ratio of the compost material and desalination treatment; Step 4: Heating and aging treatment: The mixed material is introduced into the heating and aging mixer, and high-temperature steam is introduced to generate high temperature inside the mixer. The material is continuously stirred and squeezed by the blades inside the mixer, and heat exchange is carried out. The material is simmered and dried at high temperature for a certain period of time to obtain a matured material; Step 5: Transfer the matured material: The matured material is transported to the fermentation trough in the aerobic fermentation area through the conveyor and distributor for temporary transfer and storage; Step 6, composting: A material grabbing robot grabs the mature material inside the fermentation grabbing trough and puts it into the compost fermentation tank and spreads it flat. Then, the automatic laminating machine covers it with film. Then, the auxiliary aeration mechanism assists in aeration and oxygen supply, the light-transmitting roof provides sunlight auxiliary heat, and the biological bacteria work together to quickly ferment. During the fermentation process, the material grabbing robot needs to regularly turn the pile to ensure the oxygen supply and heat dissipation inside the pile, forming fermented material, which is discharged after 15 to 30 days. Step 7: Aging: Another grabbing robot grabs the fermented material in the compost fermentation tank and transfers it to the aging tank in the aging area for aging for 30 to 60 days to obtain semi-finished products. Step 8: Transfer the semi-finished materials: Another grabbing robot grabs the semi-finished materials in the aging tank and transfers them to the tail conveyor at the end of the aging area. The tail conveyor then transports them to the discharging and packaging warehouse. Step 9, packaging of finished materials: semi-finished materials are screened in turn by screening machines to remove uncomposted particles and impurities, crushed by crushers to meet the particle size requirements of organic fertilizers, and finished materials are obtained. The finished materials are injected into the packaging machine for metering and packaging, and the packaging materials with good air permeability are used; Step 10, finished product storage: The packaged finished materials are transferred to the fertilizer warehouse for storage in a dry and ventilated warehouse to avoid moisture and contamination.

[0007] The composting plant area in the step 1 includes an office central control area, a pretreatment and auxiliary material warehouse, an aerobic fermentation area, an aging area, and a discharge packaging and fertilizer warehouse. The aerobic fermentation area and the aging area adopt an integrated composting warehouse, and the top of the composting warehouse is a translucent roof. The office central control area is located at the front side of the composting warehouse, the pretreatment and auxiliary material warehouse and the discharge packaging and fertilizer warehouse are located on the left and right sides of the composting warehouse, the length of the discharge packaging and fertilizer warehouse is longer than the sum of the lengths of the office central control area and the composting warehouse, and a number of equidistant and evenly distributed base troughs are provided inside the integrated warehouse of the aerobic fermentation area and the aging area, and two self-propelled material grabbing robots are provided on the base troughs.

[0008] Using the above structure, the office central control area is located in front of the composting warehouse and is responsible for plant-wide operation monitoring, data management, and personnel scheduling, and real-time adjustment of fermentation parameters through the central control system; the pretreatment and auxiliary material warehouse is located on one side of the composting warehouse and is responsible for sorting and crushing raw materials, and mixing them with auxiliary materials in proportion to provide materials with a suitable carbon-nitrogen ratio for fermentation; the aerobic fermentation area and aging area are integrated in the integral composting warehouse, and the translucent roof on the top uses natural light to help maintain the temperature and reduce energy consumption. The aerobic fermentation area uses forced ventilation and compost turning to achieve high-temperature degradation of organic matter; the aging area further stabilizes the compost; the discharge, packaging, and fertilizer warehouse, located on the other side, extends over the office area and composting warehouse, facilitating finished product screening, packaging, and storage, ensuring efficient logistics. A translucent roof, made of translucent material, allows sunlight to pass through, raising the warehouse temperature, reducing manual heating energy consumption, and providing protection from rain and snow. The base trough and the grabbing robot, combined with the robot, enable compost turning. The robot moves along the base trough, grabbing and spreading the pile to achieve even oxygen distribution and avoid anaerobic dead zones. Intelligent control: Sensors provide feedback on the pile's temperature and humidity, automatically adjusting the turning frequency and path to optimize fermentation efficiency. Material transfer: After aerobic fermentation is complete, the robot can move semi-finished products to the adjacent aging area, reducing manual intervention. A linear process: Raw materials enter the fermentation trough from the pretreatment area and, after aging, go directly to the discharge area, forming a one-way flow line to avoid cross-contamination. The extended discharge area design: The extra-long warehouse accommodates more finished products and reserves space for packaging equipment, supporting continuous discharge without blocking previous processes.

[0009] The base trough is divided into a fermentation material grabbing trough, a compost fermentation trough and an aging trough from front to back. An aeration base box is provided under the compost fermentation trough, and an auxiliary aeration mechanism is provided inside the aeration base box. A film partition box is provided between the compost fermentation trough and the aging trough. Film side boxes connected to the film partition box are provided on the left and right sides of the compost fermentation trough. Automatic film laminating machines are provided inside the film partition box and the two film side boxes. Main rails are provided on both sides of the upper end of the base trough.

[0010] With the above structure, the fermentation grabbing trough is located at the front end, which is used to receive the pre-treated mixed materials and evenly distribute the materials to the compost fermentation tank through the grabbing robot; the aeration base box and the auxiliary aeration mechanism cooperate to deliver controllable airflow to the pile body, ensuring uniform distribution of oxygen to avoid local anaerobic conditions; the aging tank is located at the rear end, which is used for the later maturation of compost, so that the organic matter can be further stabilized and the quality of fertilizer can be improved; the automatic film covering machine is installed inside the film covering compartment box and the film covering side box, which can automatically unfold or retract the film for the purpose of heat preservation and moisture retention: covering the pile body in low temperature or rainy days to reduce heat loss and water evaporation; avoiding compost cross-over and optimizing the fermentation environment; the main rails are laid along both sides of the upper end of the base trough for the grabbing robot to walk; the grabbing robot can move along the main rails between the fermentation grabbing trough, the compost fermentation tank and the aging tank to perform tasks such as turning the pile and transporting.

[0011] Both sides of the compost fermentation tank are provided with avoidance seams, which are connected to the film-covered side boxes on the same side. The inner bottom sides of the film-covered side boxes are provided with film-covering rails. The front side of the film-covered partition box is provided with a film outlet seam, which is connected to the compost fermentation tank.

[0012] With the above structure, the film is unfolded: the automatic laminating machine pulls the film out of the film compartment box and enters the compost fermentation tank through the film outlet seam; the two sides of the film are extended through the avoidance seam and slide smoothly along the film rail to ensure that the pile is completely covered; the film is retracted: when the pile needs to be turned or the laminating is stopped, the automatic laminating machine runs in reverse and retracts the film through the avoidance seam into the film side box and the film compartment box for storage.

[0013] The automatic laminating machine includes a laminating base and two laminating walking seats symmetrically arranged on the left and right. The laminating base is fixed inside the laminating compartment box, and bearing seats are fixed at the four corners of the upper end of the laminating base. A film guide roller is provided between the two bearing seats on the front side, and a film roll is provided between the two bearing seats on the rear side. A film roll motor is fixed to the side of the laminating base, and the output shaft of the film roll motor is transmission-connected to the rotating shaft of the film roll. Laminating walking wheels are rotatably provided on the laminating walking seats, and the laminating walking wheels are engaged with the upper end of the laminating rail on the same side. Laminating walking motors are fixed on the laminating walking seats, and the output shaft of the laminating walking motor is transmission-connected to the rotating shaft of the laminating walking wheels, and the pulling-out end of the film roll is connected to the upper ends of the two laminating walking seats.

[0014] With the above structure, when the film is unfolded, the film traveling motor starts at the same time, driving the film traveling wheel to roll forward along the film rail; the left and right film traveling seats move synchronously to ensure that the film is evenly unfolded; film release: the film roll motor rotates synchronously to release the film on the film roll, and the film is guided by the film guide roller and pulled out from the film outlet slit to cover the surface of the compost; full coverage: the film traveling seat moves to the end of the compost trough, the film is fully unfolded, and the system stops; on the contrary, when the film is retracted, the film traveling motor reverses, driving the film traveling wheel to retreat along the film rail; the film roll motor rotates in the opposite direction to rewind the film onto the film roll; reset completed: the film is fully retracted into the film compartment box for storage.

[0015] The material grabbing robot includes a gantry walking assembly, which is arranged on two main rails. A transverse movement assembly is provided below the gantry walking assembly, a lifting assembly is provided below the transverse movement assembly, a rotation assembly is provided on the lifting assembly, and a material grabbing assembly and a flipping assembly are respectively provided on the two vertical end faces of the rotation assembly.

[0016] Adopting the above structure, material grabbing and transfer, positioning and movement: the gantry walking component moves along the main rail to the target slot; the transverse movement component adjusts the transverse position to align with the material pile to be grabbed; grabbing operation: the lifting component descends to make the grabbing component contact the material; the grabbing component closes and grabs the material; the lifting component is lifted, the rotation component rotates 180°, and switches to the flipping component facing downward; transfer release: the robot moves to the target slot, the lifting component descends, and the grabbing component releases the material; pile flipping: mode switching: the rotation component rotates 180° to make the flipping component face downward; flipping operation: the lifting component descends to the pile surface, the flipping component starts, and stirs the pile; the gantry walking component moves forward slowly, and the transverse movement component reciprocates laterally to achieve uniform flipping of the entire section; aeration assistance: during the flipping process, the aeration base box oxygen supply is synchronously triggered to optimize the aerobic fermentation conditions.

[0017] The gantry walking assembly includes a walking and grabbing gantry frame, and the four corners of the lower end of the walking and grabbing gantry frame are provided with grabbing walking wheels. The two grabbing walking wheels on the left and right sides are respectively arranged on the main rails on the same side. A grabbing walking motor is fixed on the left and right sides of the walking and grabbing gantry frame, and the output shaft of the grabbing walking motor is fixedly connected to the rotating shaft of one of the grabbing walking wheels on the same side. A transverse rack is fixed on the upper end side of the walking and grabbing gantry frame.

[0018] With the above structure, longitudinal movement and power transmission: the grabbing walking motor is started, and the output shaft of the grabbing walking motor directly drives one of the grabbing walking wheels on the same side to rotate; driving the walking grabbing gantry to move; guidance and stability: the grabbing walking wheels on the left and right sides are respectively engaged on the main guide rails to ensure that the gantry moves in a straight line to prevent deviation; movement control: the central control system adjusts the speed and direction of the grabbing walking motor to achieve forward, backward and precise positioning; the transverse rack is engaged with the transverse gear of the transverse assembly. When the transverse assembly is working, the transverse gear rolls along the transverse rack, driving the transverse assembly and the lower mechanism to move laterally.

[0019] The transverse movement assembly includes a transverse movement slide, which is slidably arranged on the upper end of the walking and grabbing gantry. A transverse movement motor is fixed to the side of the transverse movement slide, and a transverse movement gear is fixed to the output shaft of the transverse movement motor. The transverse movement gear is engaged with the transverse movement rack.

[0020] With the above structure, the transverse motor is started, and the output shaft drives the transverse gear to rotate, and the transverse gear engages with the transverse rack. When the transverse gear rotates, since the transverse rack is fixed, the transverse gear will roll along the transverse rack. Since the transverse gear is installed on the transverse slide, the rolling of the transverse gear will push the entire transverse slide to move laterally along the gantry.

[0021] The lifting assembly includes four lifting hydraulic cylinders, which are fixed on a transverse sliding seat. A V-shaped lifting tilt seat is fixed at the lower end of the telescopic end of the four lifting hydraulic cylinders, and the angle of the lifting tilt seat is 45°.

[0022] With the above structure, four lifting hydraulic cylinders drive the lifting and tilting seat to move up and down. The 45° angle design of the lifting and tilting seat makes it easy to switch the flipping component and the grabbing component downward to perform corresponding work.

[0023] The rotation assembly includes a rotation motor, which is fixed on the lifting and tilting seat. The lower end surface of the lifting and tilting seat is rotatably provided with a rotation seat. The output shaft of the rotation motor is fixedly connected to the rotating shaft of the rotation seat. The rotation seat is provided with two vertically arranged mounting end surfaces.

[0024] With the above structure, the output shaft of the rotary motor drives the rotary seat to rotate 180° to switch the grabbing component and the flipping component downward. When the grabbing component is facing downward, the robot is in the grabbing mode and can grab and transfer materials; when the flipping component is facing downward, it switches to the flipping mode and can flip the pile; the rotation action of the rotary component needs to be coordinated with the lifting component. Before switching, the lifting component is lifted to a safe height to avoid collision. After switching, the lifting component descends to allow the actuator to contact the working surface.

[0025] The material grabbing assembly includes a top seat plate, which is fixed on one of the mounting end surfaces, a material grabbing bottom bucket is fixed on the rear side of the lower end of the top seat plate, and a material grabbing arc bucket is hinged on the front side of the top seat plate. Two symmetrically arranged material grabbing hydraulic cylinders and four symmetrically arranged articulated connecting rods are hinged between the upper end of the material grabbing arc bucket and the upper end of the material grabbing bottom bucket. The material grabbing hydraulic cylinder is located between the two articulated connecting rods on the same side, and a reset spring is provided between the articulated connecting rod and the upper end of the material grabbing arc bucket.

[0026] With the above structure, the piston rod of the grabbing hydraulic cylinder extends, and the piston rod pushes the grabbing arc bucket to rotate around the hinge point and move closer to the grabbing bottom bucket. The articulated connecting rods move synchronously to ensure that the arc buckets are closed in parallel to avoid side leakage of materials; material clamping: after the two buckets are closed, a closed cavity is formed, and the clamping force is adaptively adjusted through hydraulic pressure to prevent material crushing or slipping; the piston rod of the grabbing hydraulic cylinder retracts, and the reset spring assists in rebounding. The arc bucket resets: the reset spring applies tension through the articulated connecting rod to accelerate the opening of the grabbing arc bucket. The four articulated connecting rods ensure a stable opening process and reset to the maximum opening position.

[0027] The flipping assembly includes a flipping motor box, which is fixed on another mounting end face. A flipping motor is fixed inside the flipping motor box. A flipping machine cover is fixed to the lower end of the flipping motor box and the flipping motor box is located in the middle of the upper end of the flipping machine cover. A flipping shaft is provided inside the flipping machine cover for rotation. A number of flipping rods are detachably provided on the flipping shaft. A transmission part is provided between the output shaft of the flipping motor and the flipping shaft.

[0028] With the above structure, the turning motor drives the turning shaft to rotate through the transmission parts, and the material is crushed: the rotating turning rod is inserted into the pile, and the agglomerated materials are broken by impact and shear forces; for mixing and aeration, the turning rod throws the bottom material to the upper layer, achieving full-section mixing of the pile and promoting oxygen penetration; it is linked with the lifting component: the turning depth is automatically adjusted according to the pile height to ensure full coverage; and it cooperates with the aeration system: after turning, the aeration base box is triggered to supply oxygen to optimize fermentation efficiency.

[0029] A perforated partition plate is fixed in the middle of the interior of the aeration base box, and the perforated partition plate divides the interior of the aeration base box into two layers, and a plurality of rows of evenly spaced avoidance holes are opened at the bottom of the compost fermentation tank. The auxiliary aeration mechanism includes a main rotating motor, an air pump, and a plurality of rows of evenly spaced lifting screw seats and a row of evenly spaced transmission seats. The number and position of the lifting screw seats correspond to the avoidance holes. The air pump is located inside the compost warehouse. A plurality of rows of evenly spaced lifting screw seats are fixed on the upper end of the perforated partition plate. The interior of the lifting screw seats is screwed with a hollow lifting screw rod, and the lower end of the hollow lifting screw rod is penetrated by a hollow lifting screw rod. A rotating connecting air pipe is provided at the lower end of the hollow lifting screw through the perforated partition plate, a connecting ventilation pipe is provided between the air pump and several rotating connecting air pipes, a limit plate is provided at the upper end of the hollow lifting screw, the upper end of the limit plate is fixed with an aeration pipe at the lower end, the aeration pipe passes through the avoidance hole at the corresponding position, a coupling is provided between one of the rotating shafts of the transmission seat and the input shaft of the lifting screw seat, a coupling is provided between the other two rotating shafts of the two adjacent transmission seats, the input shafts of the transmission seats in the same row are connected in transmission, and the output shaft of the main motor is connected in transmission to one of the other two rotating shafts of one of the transmission seats.

[0030] With the above structure, the main motor drives the head-end transmission seat to rotate through the output shaft, and drives all the transmission seats in the same row to rotate synchronously through the coupling. One of the rotating shafts of the transmission seat drives the input shaft of the lifting screw seat to rotate, and all the lifting screw seats rise and fall synchronously. The internal thread of the lifting screw seat pushes the hollow lifting screw to move vertically. During the lifting stage, when the aeration pipe rises: the hollow lifting screw rotates forward to rise and lift the aeration pipe, and the aeration pipe extends into the compost fermentation tank through the avoidance hole. The limit plate is used for lifting and limiting. When descending, the hollow lifting screw rotates backward and retracts to be flush with the bottom of the compost fermentation tank. Airflow transportation: air pump → connecting vent pipe → rotary joint → hollow lifting screw → limit plate → aeration pipe → aeration pipe micropore.

[0031] Compared with the existing technology, the process of producing agricultural organic fertilizer by aerobic composting of marine aquaculture residue has the following advantages: Through intelligent plant layout, modular foundation trench design and automated equipment integration, efficient resource processing is achieved. The system uses a translucent roof to reduce energy consumption, and the collaborative operation of dual robots improves efficiency. The intelligent aeration system uses a liftable aeration tube with a coupling drive to improve the efficiency of aerobic fermentation and composting, and the liftable design improves oxygen utilization. The coating mechanism cooperates with the multi-degree-of-freedom grabbing robot to ensure transfer efficiency while ensuring precise control of fermentation temperature. Through three-dimensional innovation of space-equipment-process, efficient resource utilization of marine aquaculture filter residue is achieved, and its comprehensive performance indicators are improved, with significant environmental and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a process flow chart of the present invention.

[0033] Figure 2 It is the factory layout diagram of the present invention.

[0034] Figure 3 It is a three-dimensional structural diagram of part of the mechanical structure of the present invention.

[0035] Figure 4 It is a schematic diagram of the aging tank, compost fermentation tank and fermentation material holding tank in the present invention.

[0036] Figure 5 It is a structural schematic diagram of the automatic laminating machine in the present invention.

[0037] Figure 6 This invention Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0038] Figure 7 It is a schematic diagram of the three-dimensional structure of the material grabbing robot in the present invention.

[0039] Figure 8 It is a structural diagram of some components of the material grabbing robot in the present invention.

[0040] Figure 9 It is a structural diagram of the flipping assembly in the present invention.

[0041] Figure 10 It is a structural schematic diagram of the material grabbing component in the present invention.

[0042] Figure 11 It is a structural schematic diagram of some components of the auxiliary aeration mechanism in the present invention.

[0043] In the figure, 1. base trough; 2. material grabbing robot; 3. auxiliary aeration mechanism; 4. automatic laminating machine; 5. perforated partition plate; 6. aeration base box; 7. fermentation material grabbing trough; 8. compost fermentation tank; 9. avoidance hole; 10. avoidance gap; 11. laminating partition box; 12. film outlet gap; 13. aging tank; 14. main rail; 15. laminating side box; 16. laminating rail; 17. laminating base; 18. bearing seat; 19. laminating travel motor; 20. laminating travel wheel; 21. film guide roller; 22. laminating travel seat; 23. film roll; 24. film roll motor; 25. gantry travel assembly; 26. transverse movement assembly; 27. lifting assembly; 28. material grabbing assembly; 29. flipping assembly; 30. rotation Components; 31. Walking and grabbing gantry; 32. Walking motor for grabbing; 33. Walking wheel for grabbing; 34. Rotating seat; 35. Lifting and tilting seat; 36. Rotating motor; 37. Lifting hydraulic cylinder; 38. Transverse slide; 39. Transverse motor; 40. Transverse rack; 41. Flipping motor box; 42. Flipping machine cover; 43. Flipping shaft; 44. Flipping rod; 45. Transmission parts; 46. Top seat plate; 47. Grabbing hydraulic cylinder; 48. Grabbing bottom bucket; 49. Articulated connecting rod; 50. Reset spring; 51. Grabbing arc bucket; 52. Rotating connecting air pipe; 53. Lifting screw seat; 54. Hollow lifting screw; 55. Limiting plate; 56. Aeration pipe; 57. Coupling; 58. Transmission seat. DETAILED DESCRIPTION

[0044] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0045] like Figures 1-11 As shown, the process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue includes the following composting steps: Step 1: Raw material collection and impurity removal: The marine aquaculture residues from each aquaculture area or factory aquaculture workshop are collected in a timely manner and preliminarily sorted to remove impurities (such as plastics, metals, etc.). The cleaned aquaculture residues are then transported to the pretreatment and auxiliary material storage of the composting plant; Step 2: Draining and crushing: The aquaculture filter residue is injected into a screw conveyor for drainage to control the moisture content of the filter residue. The drained filter residue is then injected into a crusher for crushing to a particle size of 2 to 5 cm to obtain crushed material. Step 3: Mixed desalination treatment: According to the characteristics of the filter residue, add an appropriate amount of auxiliary materials, and simultaneously convey and mix them through a scraper conveyor and a spiral distributor to obtain a mixed material. The auxiliary materials include but are not limited to biological bacteria, straw, wood chips and rice husks, which improve the air permeability and carbon-nitrogen ratio of the compost material and the desalination treatment. The addition ratio of auxiliary materials is generally 30% to 50% of the filter residue mass; Step 4: Heating and aging treatment: The mixed material is introduced into the heating and aging mixer, and high-temperature steam is introduced to generate high temperature inside the mixer. The material is continuously stirred and squeezed by the blades inside the mixer, and heat exchange is carried out. The material is simmered and dried at high temperature for a certain period of time to obtain a matured material; Step 5: Transfer the matured material: The matured material is transported to the fermentation trough in the aerobic fermentation area through the conveyor and distributor for temporary transfer and storage; Step 6, composting: A material grabbing robot grabs the mature material inside the fermentation grabbing trough and puts it into the compost fermentation tank and spreads it flat. Then, the automatic laminating machine covers it with film. Then, the auxiliary aeration mechanism assists in aeration and oxygen supply, the light-transmitting roof provides sunlight auxiliary heat, and the biological bacteria work together to quickly ferment. During the fermentation process, the material grabbing robot needs to turn the pile regularly to ensure the oxygen supply and heat dissipation inside the pile. The turning frequency is generally once every 3 to 5 days. Fermented material is formed and discharged after 15 to 30 days. Step 7: Aging: Another grabbing robot grabs the fermented material in the compost fermentation tank and transfers it to the aging tank in the aging area for aging for 30 to 60 days to obtain semi-finished products. Step 8: Transfer the semi-finished materials: Another grabbing robot grabs the semi-finished materials in the aging tank and transfers them to the tail conveyor at the end of the aging area. The tail conveyor then transports them to the discharging and packaging warehouse. Step 9, packaging of finished materials: the semi-finished materials are screened in turn by a screening machine to remove uncomposted particles and impurities, and then crushed by a crusher to make the particle size reach 3-5mm to meet the particle size requirements of organic fertilizers, and the finished materials are injected into the packaging machine for metering and packaging, using packaging materials with good air permeability; Step 10, finished product storage: The packaged finished materials are transferred to the fertilizer warehouse for storage in a dry and ventilated warehouse to avoid moisture and contamination.

[0046] The composting plant area in step one includes an office central control area, a pretreatment and auxiliary material warehouse, an aerobic fermentation area, an aging area, and a discharge packaging and fertilizer warehouse. The aerobic fermentation area and the aging area adopt an integrated composting warehouse, and the top of the composting warehouse is a translucent roof. The office central control area is located in the front side of the composting warehouse, the pretreatment and auxiliary material warehouse and the discharge packaging and fertilizer warehouse are located on the left and right sides of the composting warehouse, and the length of the discharge packaging and fertilizer warehouse is longer than the sum of the lengths of the office central control area and the composting warehouse. A number of equidistant and evenly distributed base troughs 1 are provided inside the integrated warehouse of the aerobic fermentation area and the aging area, and two self-propelled material grabbing robots 2 are provided on the base troughs 1.

[0047] The office central control area is located in front of the composting warehouse and is responsible for plant-wide operation monitoring, data management, and personnel scheduling. Fermentation parameters (such as ventilation and temperature) are adjusted in real time through the central control system. The pretreatment and auxiliary material warehouse is located on one side of the composting warehouse and is responsible for sorting and crushing raw materials (such as kitchen waste and straw), and mixing them with auxiliary materials (such as sawdust) in proportion to provide materials with a suitable carbon-nitrogen ratio for fermentation. The aerobic fermentation area and aging area are integrated into the integral composting warehouse, and the translucent roof on the top uses natural light to help maintain the temperature and reduce energy consumption. The aerobic fermentation area achieves high-temperature degradation of organic matter through forced ventilation and compost turning; the aging area further stabilizes the compost; the discharge packaging and fertilizer warehouse: located on the other side, the length extends to cover the office area and compost warehouse, facilitating the screening, packaging and storage of finished products, ensuring efficient logistics; the translucent roof: made of translucent materials (such as polycarbonate panels), allowing sunlight to pass through to increase the temperature in the warehouse, reduce artificial heating energy consumption, and protect against rain and snow; the base trough 1 cooperates with the grabbing robot 2: it can turn the compost: the robot moves along the base trough, grabs and throws the pile, and realizes Oxygen is evenly distributed to avoid anaerobic dead corners; intelligent control: sensors provide feedback on the temperature and humidity of the pile, automatically adjusting the turning frequency and path to optimize fermentation efficiency; material transfer: after aerobic fermentation is completed, the robot can move the semi-finished products to the adjacent aging area to reduce manual intervention; linear process: raw materials enter the fermentation bin from the pretreatment area, and after aging, go directly to the discharging area, forming a one-way production line to avoid cross contamination; extended discharging area design: the extra-long warehouse can accommodate more finished products and reserve space for packaging equipment, supporting continuous discharging without blocking the previous process.

[0048] The base trough 1 is divided into a fermentation material grabbing trough 7, a compost fermentation trough 8 and an aging trough 13 from front to back. An aeration base box 6 is provided below the compost fermentation trough 8, and an auxiliary aeration mechanism 3 is provided inside the aeration base box 6. A film partition box 11 is provided between the compost fermentation trough 8 and the aging trough 13. Film side boxes 15 connected to the film partition box 11 are provided on the left and right sides of the compost fermentation trough 8. Automatic film laminating machines 4 are provided inside the film partition box 11 and the two film side boxes 15. Main rails 14 are provided on both sides of the upper end of the base trough 1.

[0049] The fermentation grabbing trough 7 is located at the front end, which is used to receive the pre-treated mixed materials and evenly distribute the materials to the compost fermentation tank 8 through the grabbing robot 2; the aeration base box 6 and the auxiliary aeration mechanism 3 cooperate to deliver controllable airflow to the pile body, ensuring uniform distribution of oxygen to avoid local anaerobic conditions; the aging tank 13 is located at the rear end, which is used for the later maturation of compost, so that the organic matter can be further stabilized and the quality of fertilizer can be improved; the automatic film covering machine 4 is installed inside the film covering compartment box 11 and the film covering side box 15, which can automatically unfold or retract the film for the purpose of heat preservation and moisture retention: covering the pile body in low temperature or rainy days to reduce heat loss and water evaporation; avoiding compost cross-over and optimizing the fermentation environment; the main rail 14 is laid along both sides of the upper end of the base trough 1 for the grabbing robot 2 to walk; the grabbing robot 2 can move along the main rail 14 between the fermentation grabbing trough 7, the compost fermentation tank 8 and the aging tank 13 to perform tasks such as turning the pile and transporting.

[0050] Both sides of the compost fermentation tank 8 are provided with avoidance seams 10, which are connected to the film-coated side box 15 on the same side. The inner bottom side of the film-coated side box 15 is provided with a film-coated rail 16, and the front side of the film-coated partition box 11 is provided with a film outlet seam 12, which is connected to the compost fermentation tank 8.

[0051] Film deployment: The automatic film laminating machine 4 pulls out the film from the film compartment box 11 and enters the compost fermentation tank 8 through the film outlet slit 12; the two sides of the film extend through the avoidance slit 10 and slide smoothly along the film rail 16 to ensure that the pile is completely covered; Film retraction: When it is necessary to turn the pile or stop laminating, the automatic film laminating machine 4 runs in reverse and retracts the film through the avoidance slit 10 to the film side box 15 and the film compartment box 11 for storage.

[0052] The automatic laminating machine 4 includes a laminating base 17 and two laminating walking seats 22 symmetrically arranged on the left and right. The laminating base 17 is fixed to the inside of the laminating compartment 11. Bearing seats 18 are fixed to the four corners of the upper end of the laminating base 17. A film guide roller 21 is provided between the two bearing seats 18 on the front side, and a film roll 23 is provided between the two bearing seats 18 on the rear side. A film roll motor 24 is fixed to the side of the laminating base 17. The output shaft of the film roll motor 24 is connected to the rotating shaft of the film roll 23. Laminating walking wheels 20 are rotatably provided on the laminating walking seats 22. The laminating walking wheels 20 are engaged with the upper end of the laminating rail 16 on the same side. Laminating walking motors 19 are fixed to the laminating walking seats 22. The output shaft of the laminating walking motor 19 is connected to the rotating shaft of the laminating walking wheels 20. The pulling end of the film roll 23 is connected to the upper ends of the two laminating walking seats 22.

[0053] The film is unfolded, and the film traveling motor 19 is started at the same time, driving the film traveling wheel 20 to roll forward along the film rail 16 (toward the compost fermentation tank 8); the left and right film traveling seats 22 move synchronously to ensure that the film is evenly unfolded; film release: the film roll motor 24 rotates synchronously to release the film on the film roll 23, and the film is guided by the film guide roller 21 and pulled out from the film outlet slit 12 to cover the surface of the compost; complete coverage: the film traveling seat 22 moves to the end of the compost tank, the film is fully unfolded, and the system stops; on the contrary, when the film is retracted, the film traveling motor 19 reverses, driving the film traveling wheel 20 to retreat along the film rail 16; the film roll motor 24 rotates in the opposite direction to rewind the film onto the film roll 23; reset completed: the film is completely retracted into the film compartment 11 for storage.

[0054] The material grabbing robot 2 includes a gantry walking assembly 25, which is arranged on two main rails 14. A transverse movement assembly 26 is provided below the gantry walking assembly 25, and a lifting assembly 27 is provided below the transverse movement assembly 26. A rotation assembly 30 is provided on the lifting assembly 27, and a material grabbing assembly 28 and a flipping assembly 29 are respectively provided on the two vertical end faces of the rotation assembly 30.

[0055] Material grabbing and transfer (grabbing mode), positioning and movement: the gantry walking component 25 moves along the main rail 14 to the target slot; the transverse movement component 26 adjusts the transverse position to align with the material pile to be grabbed; grabbing operation: the lifting component 27 descends, so that the grabbing component 28 contacts the material; the grabbing component 28 closes and grabs the material; the lifting component 27 is lifted, the rotation component 30 rotates 180°, and switches to the flipping component 29 facing downward (to avoid interference); transfer release: the robot moves to the target slot, the lifting component 27 descends, and the grabbing component 28 releases the material; pile flipping (flipping mode): mode switching: the rotation component 30 rotates 180° to make the flipping component 29 face downward; flipping operation: the lifting component 27 descends to the pile surface, the flipping component 29 starts, and stirs the pile; the gantry walking component 25 slowly moves forward, and the transverse movement component 26 reciprocates laterally to achieve uniform flipping of the entire section; aeration assistance: during the flipping process, the aeration base box 6 is simultaneously triggered to supply oxygen to optimize aerobic fermentation conditions.

[0056] The gantry walking assembly 25 includes a walking and grabbing gantry 31, and the four corners of the lower end of the walking and grabbing gantry 31 are provided with grabbing walking wheels 33. The two grabbing walking wheels 33 on the left and right sides are respectively arranged on the main guide rails 14 on the same side. A grabbing walking motor 32 is fixed on the left and right sides of the walking and grabbing gantry 31, and the output shaft of the grabbing walking motor 32 is fixedly connected to the rotating shaft of one of the grabbing walking wheels 33 on the same side. A transverse rack 40 is fixed on the upper end side of the walking and grabbing gantry 31.

[0057] Longitudinal movement (along the main guide rail 14), power transmission: the grabbing walking motor 32 is started, and the output shaft of the grabbing walking motor 32 directly drives one of the grabbing walking wheels 33 on the same side to rotate; driving the walking grabbing gantry 31 to move; guidance and stability: the grabbing walking wheels 33 on the left and right sides are respectively engaged on the main guide rail 14 to ensure that the gantry moves in a straight line to prevent deviation; movement control: the central control system adjusts the speed and direction of the grabbing walking motor 32 to achieve forward, backward and precise positioning; the transverse rack 40 is engaged with the transverse gear of the transverse assembly 26. When the transverse assembly 26 is working, the transverse gear rolls along the transverse rack 40, driving the transverse assembly 26 and the lower mechanism to move laterally.

[0058] The transverse movement assembly 26 includes a transverse movement slide 38, which is slidably set at the upper end of the walking and grabbing gantry 31. A transverse movement motor 39 is fixed to the side of the transverse movement slide 38, and a transverse movement gear is fixed on the output shaft of the transverse movement motor 39. The transverse movement gear is engaged with the transverse movement rack 40.

[0059] The transverse motor 39 is started, and the output shaft drives the transverse gear to rotate, and the transverse gear is engaged with the transverse rack 40. When the transverse gear rotates, since the transverse rack 40 is fixed, the transverse gear will roll along the transverse rack 40. Since the transverse gear is installed on the transverse slide 38, the rolling of the transverse gear will push the entire transverse slide 38 to move laterally along the gantry.

[0060] The lifting assembly 27 includes four lifting hydraulic cylinders 37, which are fixed to a transverse slide 38. A V-shaped lifting tilt seat 35 is fixed to the lower end of the telescopic end of the four lifting hydraulic cylinders 37, and the angle of the lifting tilt seat 35 is 45°.

[0061] The four lifting hydraulic cylinders 37 drive the lifting and tilting seat 35 to move up and down. The 45° angle design of the lifting and tilting seat 35 facilitates switching the flipping assembly 29 and the grabbing assembly 28 downward to perform corresponding work.

[0062] The rotation assembly 30 includes a rotation motor 36, which is fixed on the lifting and tilting seat 35. The lower end surface of the lifting and tilting seat 35 is rotatably provided with a rotation seat 34. The output shaft of the rotation motor 36 is fixedly connected to the rotating shaft of the rotation seat 34. The rotation seat 34 is provided with two vertically arranged mounting end surfaces.

[0063] The output shaft of the rotation motor 36 drives the rotation seat 34 to rotate 180° to switch the grabbing component 28 and the flipping component 29 downward. When the grabbing component 28 is facing downward, the robot is in the grabbing mode and can grab and transfer materials; when the flipping component 29 is facing downward, it switches to the flipping mode and can flip the pile; the rotation action of the rotation component 30 needs to be coordinated with the lifting component 27. Before switching, the lifting component 27 is lifted to a safe height to avoid collision. After switching, the lifting component 27 is lowered to allow the actuator to contact the working surface.

[0064] The material grabbing assembly 28 includes a top seat plate 46, which is fixed on one of the mounting end surfaces. A material grabbing bottom bucket 48 is fixed to the rear side of the lower end of the top seat plate 46, and a material grabbing arc bucket 51 is hinged on the front side of the top seat plate 46. Two symmetrically arranged material grabbing hydraulic cylinders 47 and four symmetrically arranged articulated connecting rods 49 are hinged between the upper end of the material grabbing arc bucket 51 and the upper end of the material grabbing bottom bucket 48. The material grabbing hydraulic cylinder 47 is located between the two articulated connecting rods 49 on the same side, and a reset tension spring 50 is provided between the articulated connecting rod 49 and the upper end of the material grabbing arc bucket 51.

[0065] The piston rod of the grabbing hydraulic cylinder 47 extends, and the piston rod pushes the grabbing arc bucket 51 to rotate around the hinge point and move closer to the grabbing bottom bucket 48. The hinged connecting rod 49 moves synchronously to ensure that the arc buckets are closed in parallel to avoid side leakage of materials; material clamping: after the two buckets are closed, a closed cavity is formed, and the clamping force is adaptively adjusted by hydraulic pressure to prevent the material from being crushed or slipping; the piston rod of the grabbing hydraulic cylinder 47 retracts, and at the same time the reset spring 50 assists in rebounding, and the arc bucket is reset: the reset spring 50 applies tension through the hinged connecting rod 49 to accelerate the opening of the grabbing arc bucket 51. The four hinged connecting rods 49 ensure the stability of the opening process and reset to the maximum opening position.

[0066] The flipping assembly 29 includes a flipping motor box 41, which is fixed on the other mounting end face. A flipping motor is fixed inside the flipping motor box 41. A flipping machine cover 42 is fixed to the lower end of the flipping motor box 41 and the flipping motor box 41 is located in the middle of the upper end of the flipping machine cover 42. A flipping shaft 43 is provided inside the flipping machine cover 42 for rotation. A number of flipping rods 44 are detachably provided on the flipping shaft 43. A transmission part 45 is provided between the output shaft of the flipping motor and the flipping shaft 43.

[0067] The turning motor drives the turning shaft 43 to rotate through the transmission part 45, and the material is crushed: the rotating turning rod 44 is inserted into the pile body, and the agglomerated material is broken by impact force and shear force; mixed aeration, the turning rod 44 throws the bottom material to the upper layer, achieving full-section mixing of the pile body and promoting oxygen penetration; it is linked with the lifting component 27: the turning depth is automatically adjusted according to the pile height to ensure full coverage; and it cooperates with the aeration system: after turning, the aeration base box 6 is triggered to supply oxygen to optimize fermentation efficiency.

[0068] A perforated partition plate 5 is fixed in the middle of the interior of the aeration base box 6. The perforated partition plate 5 divides the interior of the aeration base box 6 into two layers, an upper layer and an lower layer. The lower bottom of the compost fermentation tank 8 is provided with several rows of equally spaced avoidance holes 9. The auxiliary aeration mechanism 3 includes a main rotating motor, an air pump and several rows of equally spaced lifting screw seats 53 and a row of equally spaced transmission seats 58. The number and position of the lifting screw seats 53 correspond to those of the avoidance holes 9. The air pump is located inside the compost warehouse. Several rows of equally spaced lifting screw seats 53 are fixed on the upper end of the perforated partition plate 5. The interior of the lifting screw seat 53 is screwed with a hollow lifting screw 54. The lower end of the hollow lifting screw 54 passes through the perforated partition plate. Plate 5, a rotating connecting air pipe 52 is provided at the lower end of the hollow lifting screw 54, a connecting ventilation pipe is provided between the air pump and the several rotating connecting air pipes 52, a limiting plate 55 is provided at the upper end of the hollow lifting screw 54, the upper end of the limiting plate 55 is fixed with an aeration pipe 56 at the lower end, the aeration pipe 56 passes through the avoidance hole 9 at the corresponding position, a coupling 57 is provided between one of the rotating shafts of the transmission seat 58 and the input shaft of the lifting screw seat 53, a coupling 57 is provided between the other two rotating shafts of the two adjacent transmission seats 58, the input shafts of the transmission seats 58 in the same row are connected in transmission, and the output shaft of the main motor is connected in transmission with one of the other two rotating shafts of one of the transmission seats 58.

[0069] The main motor drives the head-end transmission seat 58 to rotate through the output shaft, and transmits the power through the coupling 57, driving all the transmission seats 58 in the same row to rotate synchronously. One of the rotating shafts of the transmission seat 58 drives the input shaft of the lifting screw seat 53 to rotate, and all the lifting screw seats 53 rise and fall synchronously. The internal thread of the lifting screw seat 53 pushes the hollow lifting screw 54 to move vertically. During the lifting stage, when the aeration pipe 56 rises: the hollow lifting screw 54 rotates forward to rise and lift the aeration pipe 56. The aeration pipe 56 extends into the compost fermentation tank 8 through the avoidance hole 9. The limit plate 55 is used for lifting and limiting. When descending, the hollow lifting screw 54 rotates backward to speak and retracts to be flush with the bottom of the compost fermentation tank 8. Airflow conveying: air pump → connecting vent pipe → rotary joint → hollow lifting screw 54 → limit plate 55 → aeration pipe 56 → aeration pipe micropore, the airflow speed can be adjusted in the range of 0.5-3m / s.

[0070] Working principle of the present invention: Step 1: Raw material collection and impurity removal: The seawater aquaculture residues from each aquaculture area or factory aquaculture workshop are collected in a timely manner, preliminarily sorted, and impurities are removed. The cleaned aquaculture residues are then transported to the pretreatment and auxiliary material storage of the composting plant; Step 2: Draining and crushing: The aquaculture filter residue is injected into a screw conveyor for drainage to control the moisture content of the filter residue. The drained filter residue is then injected into a crusher for crushing to a particle size of 2 to 5 cm to obtain crushed material. Step 3: Mixed desalination treatment: According to the characteristics of the filter residue, add an appropriate amount of auxiliary materials, and simultaneously convey and mix them through a scraper conveyor and a spiral distributor to obtain a mixed material. The auxiliary materials include but are not limited to biological bacteria, straw, wood chips and rice husks, which improve the air permeability and carbon-nitrogen ratio of the compost material. The addition ratio of auxiliary materials is generally 30% to 50% of the filter residue mass; Step 4: Heating and aging treatment: The mixed material is introduced into the heating and aging mixer, and high-temperature steam is introduced to generate high temperature inside the mixer. The material is continuously stirred and squeezed by the blades inside the mixer, and heat exchange is carried out. The material is simmered and dried at high temperature for a certain period of time to obtain a matured material; Step 5: Transfer the matured material: The matured material is transported to the fermentation trough in the aerobic fermentation area through the conveyor and distributor for temporary transfer and storage; Step 6, composting: the gantry walking component 25 of a grabbing robot 2 moves along the main rail 14 to the target slot, and the transverse moving component 26 adjusts the lateral position to align with the pile of materials to be grabbed; the lifting component 27 descends, so that the grabbing component 28 contacts the materials; the grabbing component 28 closes and grabs the materials; the matured materials in the fermentation grabbing tank 7 are grabbed and put into the compost fermentation tank and spread flat. Then, the automatic laminating machine starts laminating, i.e., the laminating travel motor 19 is started simultaneously, driving the laminating travel wheel 20 to roll forward (toward the compost fermentation tank 8) along the laminating rail 16; the left and right laminating travel seats 22 move synchronously to ensure uniform film spreading; film release: the film roll motor 24 rotates synchronously to release the film on the film roll 23, and the film is guided by the film guide roller 21 and pulled out from the film outlet slit 12 to cover the surface of the compost; complete coverage: the film roll seat 22 moves to the end of the compost tank, the film is fully spread, and the system stops; The main motor drives the head end transmission seat 58 to rotate through the output shaft, and transmits the power through the coupling 57, driving all the transmission seats 58 in the same row to rotate synchronously. One of the rotating shafts of the transmission seat 58 drives the input shaft of the lifting screw seat 53 to rotate, and all the lifting screw seats 53 are lifted and lowered synchronously. The internal thread of the lifting screw seat 53 pushes the hollow lifting screw 54 to move vertically. During the lifting stage, when the aeration pipe 56 rises: the hollow lifting screw 54 rotates forward to rise, lifting the aeration pipe 56, and the aeration pipe 56 extends into the interior of the compost fermentation tank 8 through the avoidance hole 9. The limit plate 55 is used for lifting and limiting. When descending, the hollow lifting screw 54 rotates back and speaks downward, retracting to be flush with the bottom of the compost fermentation tank 8. Airflow conveying: air pump → connecting vent pipe → rotary joint → hollow lifting screw 54 → limit plate 55 → aeration pipe 56 → aeration pipe micropores, auxiliary aeration and oxygen supply; the transparent roof sunlight assists Under the combined action of heat and biological bacteria, fermentation occurs rapidly. During the fermentation process, the material grabbing robot needs to turn the pile regularly. When the film is retracted, the film traveling motor 19 reverses, driving the film traveling wheel 20 to retreat along the film rail 16; the film roll motor 24 rotates in the opposite direction to rewind the film onto the film roll 23; reset is completed: the film is completely retracted into the film compartment 11 for storage; pile turning (turning mode): mode switching: the rotation component 30 rotates 180° so that the turning component 29 faces downward; turning operation: the lifting component 27 descends to the surface of the pile, the turning component 29 starts, and the pile is stirred; the gantry traveling component 25 moves forward slowly, and the transverse movement component 26 reciprocates laterally to achieve uniform turning of the entire cross-section; to ensure the oxygen supply and heat dissipation inside the pile, the turning frequency is generally once every 3 to 5 days to form fermented material, which will be discharged after 15 to 30 days; Step 7, aging: Another grabbing robot 2 grabs the fermented material in the compost fermentation tank 8 and transfers it to the aging tank 13 in the aging area for aging for 30 to 60 days to obtain semi-finished product; Step 8: Transferring semi-finished materials: Another grabbing robot 2 grabs the semi-finished materials in the aging tank 13 and transfers them to the tail conveyor at the end of the aging area. The tail conveyor then transfers them to the discharging and packaging warehouse. Step 9, packaging of finished materials: the semi-finished materials are screened in turn by a screening machine to remove uncomposted particles and impurities, and then crushed by a crusher to make the particle size reach 3-5mm to meet the particle size requirements of organic fertilizers, and the finished materials are injected into the packaging machine for metering and packaging, using packaging materials with good air permeability; Step 10, finished product storage: The packaged finished materials are transferred to the fertilizer warehouse for storage in a dry and ventilated warehouse to avoid moisture and contamination.

[0071] In summary, efficient impurity removal and resource utilization: through mechanical sorting to remove impurities such as plastics and metals, the purity of raw materials is ensured, and aquaculture waste is highly utilized as a resource; intelligent moisture control: screw conveyor drainage + crushing treatment, the moisture content of the filter residue is precisely controlled, creating ideal conditions for subsequent fermentation; composite desalination technology: the unique "auxiliary material blending + steam aging" process achieves a high salt removal rate, solving the problem of excessive salt content in marine aquaculture waste; Four-dimensional fermentation system: integrating film temperature control, intelligent aeration, sunlight auxiliary heating and bacterial agents to shorten the fermentation cycle; Fully automated operation: Equipped with a dual-grabbing robot system, it achieves precise control of compost turning frequency and reduces costs. Modular aging design: Independent aging tanks and tail conveyors enable batch management and improve product stability. The three-stage refining process: screening-crushing-metering and packaging, ensures the qualified particle size rate of the finished product. Eco-friendly packaging solution: Biodegradable and breathable packaging materials are used to maintain the activity of the fertilizer for more than 12 months under storage conditions. Intelligent plant planning: adopts a linear layout of three zones (front, middle and back) (pretreatment → fermentation / aging → discharge), shortening the material flow path; The modular base tank system's equally spaced base tanks enable batch management, and the fermentation-aging linkage design shortens material transfer distances. Dual robots collaborate to improve efficiency. Fully automatic film covering and temperature and humidity linkage control improve the moisture retention rate of fermentation; The multi-degree-of-freedom material handling robot can quickly switch between compost turning and material handling, with stable material handling and intelligent and efficient compost turning cycles. The intelligent aeration system improves the efficiency of aerobic fermentation and composting, and the liftable design improves oxygen utilization; Through three-dimensional innovation in space-equipment-process, this system achieves efficient resource utilization of marine aquaculture residue, improves its comprehensive performance indicators, and has significant environmental and economic benefits.

[0072] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue, wherein the preamble is characterized in that: Composting steps include: Step 1: Raw material collection and impurity removal: The seawater aquaculture residues from each aquaculture area or factory aquaculture workshop are collected in a timely manner, preliminarily sorted, and impurities are removed. The cleaned aquaculture residues are then transported to the pretreatment and auxiliary material storage of the composting plant; Step 2: Draining and crushing: inject the aquaculture filter residue into a screw conveyor for drainage to control the moisture content of the filter residue, and then inject the drained filter residue into a crusher for crushing to obtain crushed material; Step 3: Mixing and desalting: According to the characteristics of the filter residue, add an appropriate amount of auxiliary materials, and simultaneously convey and mix them through a scraper conveyor and a spiral distributor to obtain a mixed material. The auxiliary materials include but are not limited to biological bacteria, straw, wood chips and rice husks, which improve the air permeability and carbon-nitrogen ratio of the compost material and desalination treatment; Step 4: Heating and aging treatment: The mixed material is introduced into the heating and aging mixer, and high-temperature steam is introduced to generate high temperature inside the mixer. The material is continuously stirred and squeezed by the blades inside the mixer, and heat exchange is carried out. The material is simmered and dried at high temperature for a certain period of time to obtain a matured material; Step 5: Transfer the matured material: The matured material is transported to the fermentation trough in the aerobic fermentation area through the conveyor and distributor for temporary transfer and storage; Step 6, composting: A material grabbing robot grabs the mature material inside the fermentation grabbing trough and puts it into the compost fermentation tank and spreads it flat. Then, the automatic laminating machine covers it with film. Then, the auxiliary aeration mechanism assists in aeration and oxygen supply, the light-transmitting roof provides sunlight auxiliary heat, and the biological bacteria work together to quickly ferment. During the fermentation process, the material grabbing robot needs to regularly turn the pile to ensure the oxygen supply and heat dissipation inside the pile, forming fermented material, which is discharged after 15 to 30 days. Step 7: Aging: Another grabbing robot grabs the fermented material in the compost fermentation tank and transfers it to the aging tank in the aging area for aging for 30 to 60 days to obtain semi-finished products. Step 8: Transferring semi-finished materials: Another grabbing robot grabs the semi-finished materials in the aging tank and transfers them to the tail conveyor at the end of the aging area. The tail conveyor then transports them to the discharging and packaging warehouse. Step 9, packaging of finished materials: semi-finished materials are screened in turn by screening machines to remove uncomposted particles and impurities, crushed by crushers to meet the particle size requirements of organic fertilizers, and finished materials are obtained. The finished materials are injected into the packaging machine for metering and packaging, and the packaging materials with good air permeability are used; Step 10, finished product storage: The packaged finished materials are transferred to the fertilizer warehouse for storage in a dry and ventilated warehouse to avoid moisture and contamination.

2. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 1, characterized in that: The composting plant area in step 1 includes an office central control area, a pretreatment and auxiliary material warehouse, an aerobic fermentation area, an aging area, and a discharge packaging and fertilizer warehouse. The aerobic fermentation area and the aging area adopt an integrated composting warehouse, and the top of the composting warehouse is a translucent roof. The office central control area is located at the front side of the composting warehouse. The pretreatment and auxiliary material warehouse and the discharge packaging and fertilizer warehouse are located on the left and right sides of the composting warehouse. The length of the discharge packaging and fertilizer warehouse is longer than the sum of the lengths of the office central control area and the composting warehouse. A plurality of equally spaced base troughs (1) are provided inside the integrated warehouse of the aerobic fermentation area and the aging area. Two self-propelled material grabbing robots (2) are provided on the base troughs (1).

3. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 2, characterized in that: The base trough (1) is divided into a fermentation material trough (7), a compost fermentation trough (8) and an aging trough (13) from front to back. An aeration base box (6) is provided below the compost fermentation trough (8), and an auxiliary aeration mechanism (3) is provided inside the aeration base box (6). A film partition box (11) is provided between the compost fermentation trough (8) and the aging trough (13). Film side boxes (15) connected to the film partition box (11) are provided on both sides of the compost fermentation trough (8). Automatic film laminating machines (4) are provided inside the film partition box (11) and the two film side boxes (15). Main guide rails (14) are provided on both sides of the upper end of the base trough (1).

4. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 3, characterized in that: Both sides of the compost fermentation tank (8) are provided with avoidance slits (10), which are connected to the film-coated side box (15) on the same side. The inner bottom side of the film-coated side box (15) is provided with a film-coated rail (16). The front side of the film-coated partition box (11) is provided with a film-outlet slit (12), which is connected to the compost fermentation tank (8).

5. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 4, characterized in that: The automatic laminating machine (4) comprises a laminating base (17) and two laminating walking seats (22) symmetrically arranged on the left and right. The laminating base (17) is fixed inside the laminating compartment (11). The four corners of the upper end of the laminating base (17) are fixed with bearing seats (18). A film guide roller (21) is provided between the two bearing seats (18) on the front side. A film roll (23) is provided between the two bearing seats (18) on the rear side. A film roll motor (24) is fixed on the side of the laminating base (17). The output shaft of the winding motor (24) is connected to the rotating shaft of the film roll (23); the film running seat (22) is provided with a film running wheel (20) for rotation; the film running wheel (20) is engaged with the upper end of the film rail (16) on the same side; the film running seat (22) is fixed with a film running motor (19); the output shaft of the film running motor (19) is connected to the rotating shaft of the film running wheel (20); the pulling end of the film roll (23) is connected to the upper ends of the two film running seats (22).

6. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 5, characterized in that: The material grabbing robot (2) includes a gantry walking assembly (25), which is arranged on two main guide rails (14), a lateral movement assembly (26) is provided below the gantry walking assembly (25), a lifting assembly (27) is provided below the lateral movement assembly (26), a rotation assembly (30) is provided on the lifting assembly (27), and a material grabbing assembly (28) and a flipping assembly (29) are respectively provided on two vertical end faces of the rotation assembly (30).

7. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 6, characterized in that: The gantry walking assembly (25) includes a walking material grabbing gantry (31), and the four corners of the lower end of the walking material grabbing gantry (31) are each provided with a material grabbing walking wheel (33), and the two material grabbing walking wheels (33) on the left and right sides are respectively arranged on the main guide rail (14) on the same side, and a material grabbing walking motor (32) is fixed on the left and right sides of the walking material grabbing gantry (31), and the output shaft of the material grabbing walking motor (32) is fixedly connected to the rotating shaft of one of the material grabbing walking wheels (33) on the same side, and a transverse rack (40) is fixed to the upper end side of the walking material grabbing gantry (31); the transverse assembly (26) includes a transverse slide (38), and the transverse slide (38) is slidably arranged on the upper end of the walking material grabbing gantry (31), and a transverse motor (39) is fixed to the side of the transverse slide (38), and a transverse gear is fixed on the output shaft of the transverse motor (39), and the transverse gear is meshed with the transverse rack (40).

8. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 7, characterized in that: The lifting assembly (27) includes four lifting hydraulic cylinders (37), which are fixed on a transverse sliding seat (38), and a V-shaped lifting tilting seat (35) is fixed at the lower end of the telescopic end of the four lifting hydraulic cylinders (37), and the angle of the lifting tilting seat (35) is 45 degrees; the rotation assembly (30) includes a rotation motor (36), which is fixed on the lifting tilting seat (35), and a rotation seat (34) is provided on the lower end surface of the lifting tilting seat (35), and the output shaft of the rotation motor (36) is fixedly connected to the rotating shaft of the rotation seat (34), and the rotation seat (34) is provided with two vertically arranged mounting end surfaces.

9. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 8, characterized in that: The material grabbing assembly (28) includes a top seat plate (46), which is fixed on one of the mounting end surfaces. A material grabbing bottom bucket (48) is fixed to the rear side of the lower end of the top seat plate (46), and a material grabbing arc bucket (51) is hinged to the front side of the top seat plate (46). Two symmetrically arranged material grabbing hydraulic cylinders (47) and four symmetrically arranged articulated connecting rods (49) are articulated between the upper end of the material grabbing arc bucket (51) and the upper end of the material grabbing bottom bucket (48). The material grabbing hydraulic cylinder (47) is located between the two articulated connecting rods (49) on the same side, and the articulated connecting rod (49) and the upper end of the material grabbing arc bucket (51) are articulated. A reset tension spring (50) is provided between the two ends of the flipping assembly (29); the flipping assembly (29) includes a flipping motor box (41), the flipping motor box (41) is fixed to the other mounting end surface, a flipping motor is fixed inside the flipping motor box (41), a flipping machine cover (42) is fixed at the lower end of the flipping motor box (41), and the flipping motor box (41) is located at the middle of the upper end of the flipping machine cover (42), a flipping shaft (43) is provided inside the flipping machine cover (42), a plurality of flipping rods (44) are detachably provided on the flipping shaft (43), and a transmission member (45) is provided between the output shaft of the flipping motor and the flipping shaft (43).

10. The process for producing agricultural organic fertilizer by aerobic composting of seawater aquaculture residue according to claim 9, characterized in that: A perforated partition plate (5) is fixed at the middle position of the interior of the aeration base box (6), and the perforated partition plate (5) divides the interior of the aeration base box (6) into two layers, an upper layer and an lower layer. The lower bottom of the compost fermentation tank (8) is provided with a plurality of rows of equally spaced avoidance holes (9). The auxiliary aeration mechanism (3) includes a main rotating motor, an air pump, and a plurality of rows of equally spaced lifting screw seats (53) and a row of equally spaced transmission seats (58). The number and position of the lifting screw seats (53) correspond to those of the avoidance holes (9). The air pump is located inside the composting warehouse. The plurality of rows of equally spaced lifting screw seats (53) are fixed to the upper end of the perforated partition plate (5). The interior of the lifting screw seats (53) is screwed with a hollow lifting screw (54). The lower end of the hollow lifting screw (54) passes through the perforated partition plate. Plate (5), the lower end of the hollow lifting screw (54) is provided with a rotating connecting air pipe (52), a connecting ventilation pipe is provided between the air pump and the plurality of rotating connecting air pipes (52), the upper end of the hollow lifting screw (54) is provided with a limiting plate (55), the upper end of the limiting plate (55) is fixed with an aeration pipe (56) at the lower end, the aeration pipe (56) passes through the avoidance hole (9) at the corresponding position, a coupling (57) is provided between one of the rotating shafts of the transmission seat (58) and the input shaft of the lifting screw seat (53), a coupling (57) is provided between the other two rotating shafts of the two adjacent transmission seats (58), the input shafts of the transmission seats (58) in the same row are transmission-connected, and the output shaft of the main motor is transmission-connected to one of the other two rotating shafts of one of the transmission seats (58).

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