An air duct breeding system and breeding system

Abstract

The utility model relates to the field of insect breeding, concretely is a kind of air duct breeding system and breeding system, including the air duct formed by enclosure material and at least one group of breeding system in the air duct, the air duct includes air inlet and air outlet, and breeding system includes one or more layers of breeding layer and is equipped with flow guide area above breeding layer or between upper and lower breeding layer;Flow guide area is communicated with the air duct, and the flow direction of the wind flow corresponding the region of breeding system in the air duct is consistent with the length or width direction of flow guide area;Air outlet is equipped with exhaust fan and can form negative pressure in the air duct.The application can be managed and controlled to water and gas emission by the setting of air duct breeding system, reduces the pollution of production site and environmental pollution.The effective breeding area of the application is large, and the reasonable air inlet and outlet are not easy to produce turbulent influence, the ventilation effect is good, the ventilation energy consumption is low, and the insect breeding yield is high.

Description

Technical Field

[0001] This utility model relates to the field of insect farming, specifically to a wind tunnel farming system and farming system. Background Technology

[0002] Currently, insect farming, especially black soldier fly farming, has become a direction for organic waste treatment. Its main competitive advantage lies in its economic efficiency, offering advantages over other methods such as organic waste composting and fermentation for power generation. However, the black soldier fly farming industry also suffers from low levels of automation, high labor costs, and a lack of large-scale production scenarios. Furthermore, this industry is closely related to the feed industry, and the lack of large-scale production prevents it from achieving the scale required by the feed industry. This keeps black soldier fly farming for organic waste treatment at a rudimentary agricultural stage, unable to achieve large-scale production.

[0003] Automated production lines have always been a pursuit in the black soldier fly farming industry. However, most current methods rely on stacked boxes and tiered racks, with very few equipment capable of achieving high-efficiency farming and separating the finished black soldier flies from their excrement. This is because the organic waste used for black soldier fly farming (such as livestock manure, kitchen waste, recycled food, food factory waste, fruit residue, vegetable scraps, distiller's grains, and tofu residue) has a high moisture content. For example, 100 portions of feed with a 75% moisture content, when farmed with black soldier flies, will eventually produce excrement with a 30% moisture content of 40% and fly larvae with a 20% moisture content of 60%. The resulting water discharge is approximately 100*75% - (30*40% + 20*60%) = 75 - (12 + 12) = 75 - 24 = 51 tons. Therefore, the discharged water accounts for about half of the total feed volume. If 100 tons of feed are processed daily, the discharged water will be approximately 51 tons. This enormous volume of water discharge is something most automated production line manufacturers haven't considered. This water is discharged as water vapor, which also contains ammonia, hydrogen sulfide, and other organic gases. Without emission management and control, not only is the water vapor emission inefficient, but it also leads to pollution of the production site and the environment. While existing insect farming equipment on the market has ventilation measures, most lack efficient airflow control devices to manage and promote water evaporation and the emission of water vapor and other waste gases. This results in problems such as incomplete drying of insect excrement, difficulty in separating insects from excrement, low profits, high odor concentration in the farming workshop, and significant environmental pollution risks.

[0004] For example, current trench farming methods have ventilation measures, but for a single effective farming surface, the entire space acts as a single ventilation duct, resulting in a large ventilation volume per unit effective farming area and thus high energy consumption. Similarly, in current box-stacking farming methods, due to the stacking of boxes, even though they are placed in ventilation ducts, the narrow channels between the stacked boxes create high ventilation resistance, causing air to flow primarily outside the boxes, with little actually circulating through the inner surfaces. This results in low airflow velocity and low evaporation power on the evaporation surfaces inside the boxes, ultimately leading to slow moisture removal from the feed. Furthermore, in shelf-style farming methods lacking ventilation ducts, the high ventilation resistance on the farming surface causes most of the air to flow through the less resistant feeding channels or the upper space of the shelves, resulting in low airflow and velocity on the shelf surface, thus reducing the evaporation rate. All of these situations arise from poor ventilation design, leading to low moisture evaporation rates and slow emission of other waste gases during insect farming, coupled with a lack of emission management. This makes it impossible to separate the final product insects from the insect excrement, which has a high moisture content; and because insects are prone to die in high humidity environments, the yield of the finished product is low; and it also results in high energy consumption for ventilation, exhaust, and other waste gas.

[0005] For large-scale insect farming, especially black soldier fly farming, both the existing market and the applicant have developed farming equipment that can improve the insect farming effect and improve the farming environment. The most ideal solution at present is cavity farming, which mainly involves setting up the farming equipment in a negative pressure ventilation cavity and feeding the equipment through the end or side.

[0006] However, existing feeding equipment requires opening the side walls of the aquaculture chamber to feed the equipment inside. This necessitates that the side walls of the 20-30 meter long aquaculture chamber (air duct) be able to open and close while maintaining a relative seal with the entire frame when closed to ensure negative pressure. This requirement not only involves numerous structural components and high precision but also risks failing to meet sealing standards. Reduced internal and external pressure differences allow airflow to easily escape through numerous side gaps, preventing the formation of a truly complete air duct. This not only increases equipment costs but also leads to foul odors when the aquaculture chamber's side walls are poorly sealed or when large areas are continuously opened, causing a significant increase in air pressure within the duct and a drop in negative pressure, making it impossible to control airflow direction for a certain period. Furthermore, when the feeding equipment is directly installed on the aquaculture equipment and enters the aquaculture chamber directly from the end, various compatible components such as various tracks and power elements need to be installed on the aquaculture equipment. This not only places high demands on the feeding equipment, but also makes the structure of the aquaculture equipment more complex. Moreover, since it operates inside the chamber, repairs are quite troublesome once a malfunction occurs. The entire set of equipment is relatively complex, has poor overall integrity, requires high precision, and has high maintenance costs.

[0007] In addition, due to the complex structure of these breeding chambers, which results in high wind resistance, or the complicated side sealing and control, it is impossible to form a controllable airflow in the chamber to provide the water vapor and other waste gases needed for insect growth when ventilating the breeding chamber. This can easily lead to uneven insect growth, uneven material moisture, low adult rate, poor temperature and humidity matching and wind speed in the chamber, and odor leakage that can easily pollute the environment.

[0008] Therefore, it is essential to design a simple, airflow-controlled aquaculture system. Utility Model Content

[0009] The purpose of this utility model is to solve the above-mentioned problems by proposing a wind tunnel aquaculture system and aquaculture system.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A wind tunnel aquaculture system includes a wind tunnel formed by wind tunnel walls and at least one aquaculture system disposed within the wind tunnel. The wind tunnel includes an air inlet and an air outlet, which are located at opposite ends of the wind tunnel. The aquaculture system includes one or more aquaculture layers, and a flow guide zone is provided above or between the aquaculture layers. The flow guide zone is connected to the wind tunnel, and the airflow direction in the area of ​​the wind tunnel corresponding to the aquaculture system is consistent with the length or width direction of the flow guide zone. An exhaust fan is provided on the air outlet to form an exhaust end.

[0012] Preferably, the bottom of the air duct is provided with a plurality of secondary air inlets in sequence along the length of the air duct.

[0013] Preferably, the air duct is provided with a feeding channel, and an aquaculture system is provided on one side or on both sides of the feeding channel.

[0014] Preferably, the feeding channel is connected to the guide zone.

[0015] Preferably, a breeding system is provided on both sides of the feeding channel, and each breeding system on each side has at least one corresponding air outlet. The feeding channel is located between the air outlets of the two breeding systems.

[0016] Preferably, the feeding channel is provided with openable and closable baffles at both ends.

[0017] Preferably, the height of the guide zone between each culture layer in the culture system gradually decreases from the guide zones at the top and bottom to the middle guide zone.

[0018] Preferably, at least one of the two ends of the aquaculture layer is connected to an air inlet guide plate or layered louvers with an adjustable angle between the plate surface and the upper surface of the aquaculture layer. The air inlet guide plate is a straight plate, a perforated plate, and / or an arc-shaped plate; and / or the air inlet end of each layer of the guide zone is provided with a butterfly valve or a multi-leaf regulating valve for controlling the air volume.

[0019] Preferably, the feeding channel is equipped with a windbreak device for adjusting the wind resistance of the feeding channel.

[0020] Preferably, the windbreak device includes a flow-limiting baffle supported on the side of the feeding channel away from the aquaculture system and with its free end extending into the feeding channel, and / or a flexible strip-shaped windbreak curtain hanging from the top of the air duct and capable of dividing the air duct. The windbreak curtain is one or multiple curtains arranged sequentially along the length of the air duct. The flow-limiting baffle is a straight plate, a perforated plate, and / or an arc-shaped plate. There are one or more flow-limiting baffles.

[0021] Preferably, a blower is provided on the air inlet and / or in front of the air inlet end corresponding to the aquaculture system.

[0022] Preferably, the top of the flow guiding zone, i.e. the bottom of the upper aquaculture layer, is provided with a flow equalization plate for guiding the airflow to the lower aquaculture layer, and the flow equalization plate is arranged along the width direction of the aquaculture layer.

[0023] An aquaculture system includes multiple aquaculture layers and a flow guide zone located between the upper and lower aquaculture layers. The aquaculture layer includes a conveyor belt, skirts on both sides of the conveyor belt, and an aquaculture trough formed by the conveyor belt and the skirts.

[0024] Preferably, one side of the conveyor belt is directly mounted on the wall of the air duct or on the main support via a conveyor roller connected to the conveyor belt, and the main support is erected inside the air duct; the other side of the conveyor belt is suspended to form a feeding channel, which is connected to the guide zone for feeding equipment to extend into the guide zone through the feeding channel and feed the aquaculture tank.

[0025] Preferably, the main support is provided with a conveyor belt on one or both sides, and a partition is provided on the outer side of the skirt of the conveyor belt. At least one conveyor roller is provided on the main support at each end of the conveyor belt, and at least one of the conveyor rollers is driven to rotate by a motor to move the conveyor belt. The partition is provided at the outer end of the conveyor roller.

[0026] Preferably, each side of the main support is provided with a set of aquaculture systems, and the top of the two adjacent sets of main supports are connected by connecting ribs. The main support is provided with duct walls that separate the aquaculture systems on both sides into two air ducts.

[0027] Preferably, the conveyor belt has skirts at both ends that connect to the side skirts.

[0028] Preferably, the main support is provided with a flow equalization plate located below the conveyor belt for guiding airflow to the aquaculture tank, and the flow equalization plate is arranged along the width direction of the conveyor belt.

[0029] Preferably, the aquaculture system is divided into a main aquaculture system and a secondary aquaculture system. The conveyor belt of the secondary aquaculture system is shorter than the conveyor belt of the main aquaculture system. The front ends of the multiple conveyor belts of the secondary aquaculture system extend into the guide zone at the rear end of the conveyor belt of the main aquaculture system in a corresponding manner.

[0030] Beneficial effects:

[0031] 1. This application sets up the breeding system within a complete air duct. Air enters through an inlet and exits through an outlet. The outlet is then drawn out under negative pressure by an exhaust fan, forming a negative pressure air duct. There are no commonly used openings on the sides, and the breeding system contains no other complex equipment. The aforementioned negative pressure allows water vapor and exhaust gas to be separated from the breeding surface in real time and flow along the ventilation duct and pipes, achieving management of water vapor and exhaust gas flow. This makes the airflow within the duct more controllable, and the temperature, humidity, and wind speed within the duct more precisely matched to conditions suitable for insect growth. Furthermore, the airflow can smoothly and completely pass through the guide zone of the breeding system, ensuring that insects on the breeding layer can grow as evenly and efficiently as possible, increasing the adulthood rate. Due to the negative pressure ventilation, the air pressure inside the duct is lower than outside, significantly reducing odor leakage and improving the overall comfort of the breeding environment. This application features equipment with good integrity, simple structure, and controllable airflow.

[0032] 2. This application employs a conveyor belt system for breeding. The skirt and conveyor belt enclose the breeding trough, resulting in a simple overall structure and convenient material discharge. Initially, feeding can be done only at the end of the conveyor belt, with feeding continuing as the belt moves until the skirt reaches the other end, completing the breeding process. This feeding method allows for precise metering of young larvae from the secondary breeding system to the main breeding system, avoiding the complex process of sorting and metering young larvae. When adult larvae need to be collected, there is no need for lifting or vibration; simply rotating the conveyor belt transports the adults out. A cleaning scraper can be installed at the outlet end, either in front of or below the conveyor belt, to remove all the feed. Harvesting is convenient. The entire breeding and harvesting process is easy, the simplified structure is better suited for controlled airflow within the ventilation duct, and it is low-cost and easy to maintain.

[0033] 3. This application utilizes a wind tunnel aquaculture system to manage and control the emission of moisture, ammonia, hydrogen sulfide, and other organic gases, reducing pollution at the production site and in the environment. Furthermore, this application offers a large effective aquaculture area, and with proper airflow, turbulence is minimized, resulting in excellent ventilation, good air circulation, and effective airflow across the aquaculture surface (evaporation surface). This leads to low ventilation energy consumption and a high adult insect rate.

[0034] 4. The device of this application can efficiently control air flow, thereby managing and promoting water evaporation and the emission of water vapor and other waste gases, ultimately ensuring that the dryness of insect excrement meets the standards, facilitating the separation of insects and excrement, resulting in high profits, low odor concentration in the breeding workshop, and low environmental pollution risk. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of this application;

[0036] Figure 2 This is a schematic diagram of a structure with a set of breeding systems and feeding channels;

[0037] Figure 3 A schematic diagram of a structure with two aquaculture systems and a feeding channel between the two systems;

[0038] Figure 4 A top-down view of a breeding system and feeding channels (the long downward arrow in the diagram indicates the wind direction);

[0039] Figure 5 A top-view structural diagram of a two-system aquaculture system with a feeding channel between the two systems and an air inlet and an air outlet at each end of the two systems (the downward arrow in the diagram indicates the wind direction);

[0040] Figure 6 A schematic diagram of a structure with baffles at both ends of the feeding channel;

[0041] Figure 7 This is a schematic diagram of the structure of this application, which includes a secondary air inlet and a windbreak curtain;

[0042] Figure 8 A three-dimensional structural diagram showing a system with two aquaculture systems, a feeding channel between the two systems, and baffles at both ends of the feeding channel;

[0043] Figure 9 A schematic diagram of a structure with an air inlet guide plate at the air inlet end of the aquaculture layer;

[0044] Figure 10 A three-dimensional structural diagram showing a breeding system on each main support and bridges between adjacent main supports;

[0045] Figure 11A schematic diagram of the structure of this application, showing a feeding device installed within the feeding channel;

[0046] Figure 12 This is a schematic diagram of a conveyor belt aquaculture layer.

[0047] Figure 13 This is a schematic diagram of the structure of this application with a flow equalization plate;

[0048] Figure 14 A schematic diagram showing the structure of a primary aquaculture system and a secondary aquaculture system. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the embodiments of this invention will be described in further detail below. The invention will be further explained below with reference to the accompanying drawings.

[0050] Example 1:

[0051] A wind tunnel aquaculture system includes a wind tunnel 2 enclosed by a wind tunnel wall 1, and at least one aquaculture system 05 disposed within the wind tunnel. The wind tunnel includes an air inlet 21 and an air outlet 22, located at opposite ends of the wind tunnel. The aquaculture system includes one or more aquaculture layers 5, with a flow guide zone 51 provided above or between the aquaculture layers. The flow guide zone communicates with the wind tunnel, and the airflow direction in the area corresponding to the aquaculture system within the wind tunnel is consistent with the length or width direction of the flow guide zone. An exhaust fan is provided at the air outlet to form an exhaust end. The exhaust fan ensures that the airflow within the wind tunnel is controlled and directed from the air inlet to the air outlet, preventing odor leakage at the air inlet. The exhaust fan also controls the airflow speed within the wind tunnel.

[0052] This application sets up the breeding system within a complete air duct. Air enters through an inlet and exits through an outlet. The outlet is then drawn out by a negative pressure exhaust fan, forming a negative pressure air duct. There are no commonly used openings on the sides, and the breeding system contains no other complex equipment. The aforementioned negative pressure allows water vapor and exhaust gas to be separated from the breeding surface in real time and flow along the ventilation duct and pipes, achieving management of water vapor and exhaust gas flow. This makes the airflow within the duct more controllable, and the temperature, humidity, and wind speed within the duct more precisely matched to conditions suitable for insect growth. Furthermore, the airflow can smoothly and completely pass through the guide zone of the breeding system, ensuring that insects on the breeding layer can grow as evenly and efficiently as possible, increasing the adulthood rate. Odor leakage is also greatly reduced, improving the comfort of the breeding environment. The equipment in this application has good integrity, a simple structure, controllable airflow, and is not prone to side leakage.

[0053] Example 2:

[0054] The difference from the above embodiment lies in that a plurality of secondary air inlets 211 are sequentially arranged at the bottom of the air duct along its length. The presence of multiple secondary air inlets 211 at the bottom of the air duct along its length allows multiple sources of low-humidity fresh air to enter along the length, preventing the evaporation rate from decreasing due to the continuous increase in air humidity along the length. Ideally, the secondary air inlets are located at the bottom of the air duct along the length, utilizing the upward force of naturally rising hot air for diffusion, thus reducing energy consumption.

[0055] Example 3:

[0056] The difference from the above embodiment is that the air duct is provided with a feeding channel 3, and the feeding channel is provided with a breeding system on one side or both sides.

[0057] By directly setting up a feeding channel within the air duct, the feeding equipment can operate along the channel when feeding the aquaculture system, without affecting the integrity of the entire air duct. Airflow and odor are controllable, feeding is convenient, and the separate design from the aquaculture system simplifies the system, making maintenance of each piece of equipment easy and cost-effective. Aquaculture systems can be located on one side or both sides of the feeding channel, depending on actual needs. For example, only one aquaculture system can be set up within the air duct with a feeding channel on one side, or one aquaculture system can be set up on each side of the air duct with a feeding channel in the middle for feeding the systems on both sides. Tracks and / or mobile trolleys can be laid on the feeding channel, with a feed box 02 mounted on the trolley. Feed is fed to the aquaculture layer via a perforated feeding rod 03 that extends into the guide zone and connects to the feed box. The feeding rods can be multiple, corresponding one-to-one with the aquaculture layer, or a few that can be raised and lowered. Of course, other feeding equipment can also be used in this application, as long as it can extend into the guide zone for feeding.

[0058] However, the width of the feeding channel should be minimized to reduce the ratio of the duct volume to the farming area. Minimizing this ratio allows for a reduction in the power consumption of the negative pressure exhaust fan. Simultaneously, a smaller feeding channel width increases ventilation resistance. This minimizes the amount of air flowing through the feeding channel, thereby increasing airflow in the guiding layer of the farming system.

[0059] Negative pressure ventilation, which manages the airflow of water vapor and exhaust gas, is based on the theory of air pressure difference. That is, ventilation creates negative pressure, causing air to flow from high-pressure areas to low-pressure areas, thus forming an airflow. This paper will elaborate on minimizing the ratio of duct volume to the aquaculture area to minimize the power consumption of the negative pressure ventilation fan.

[0060] The key to minimizing the power consumption of exhaust fans lies in minimizing the power consumption for water vapor evaporation. In other words, the ventilation volume should be minimized while achieving the required evaporation rate. This is explained below:

[0061] 1. Maximizing Space Utilization: Within a defined enclosed system, i.e., the air duct, the maximum possible aquaculture area, i.e., evaporation area, is achieved. Furthermore, by minimizing the volume of the air duct, the wind speed is maximized, resulting in the highest evaporation rate.

[0062] According to Dalton's law of evaporation, E = k·A·es-ea, where the evaporation coefficient k is positively correlated with wind speed, the higher the wind speed, the larger k becomes. Therefore: 1. In ducts with a small cross-sectional area, the wind speed is higher, k is larger, and the humidity rises more slowly when air flows over the evaporator. The amount of air flowing through is the same in the same amount of time, but the higher wind speed means that more water vapor is taken away per unit time, the water vapor pressure difference es-ea remains larger, and the evaporation rate E is higher; 2. In ducts with a large cross-sectional area, the wind speed is lower, k is smaller, and the air stays on the surface of the evaporator for a longer time, the humidity rises faster, the water vapor pressure difference decreases, and the evaporation rate E is lower.

[0063] 2. Large effective ventilation volume, meaning that within the air duct, there are fewer dead ventilation corners or areas with less turbulence, and fewer situations where the air cannot reach the farming surface or where the air circulates in a localized area, consuming energy without carrying away moisture and exhaust gases.

[0064] According to Bernoulli's principle: 1. Areas with high flow velocity have low pressure, and areas with low flow velocity have high pressure. If there are structures such as sudden expansion or contraction or right-angle turns in the air duct, it will lead to excessive local velocity differences, forming eddies and turbulence, and increasing pressure loss, thus increasing energy consumption; 2. Control theory of turbulence and laminar flow: Turbulent flow: The chaotic movement of fluid particles will form local rotating eddies, which consume energy and cannot effectively remove water vapor and exhaust gas. It is necessary to optimize the structure to make the airflow closer to laminar flow or "stable turbulence"—turbulence with uniform velocity and consistent direction, that is, to use laminar airflow to carry away the turbulent rotating eddies.

[0065] Example 4:

[0066] The difference from the above embodiment is that the feeding channel and the guide zone are connected.

[0067] The feeding channel and the guide zone can be directly connected, and the airflow is in a straight line. The main body of the air coming in from the air inlet passes through the breeding system and the feeding channel along a straight or near-straight line to the air outlet for discharge.

[0068] Example 5:

[0069] The difference from the above embodiment is that aquaculture systems are provided on both sides of the feeding channel, and each aquaculture system on each side has at least one corresponding air outlet. The feeding channel is located between the air outlets of the aquaculture systems on both sides. The feeding channel described above, which is located in the same air duct, can have an aquaculture system set on one side, or it can have a set of aquaculture systems set on each side.

[0070] Furthermore, when aquaculture systems are installed on both sides of the feeding channel, each aquaculture system on each side has at least one independent corresponding air outlet, and the feeding channel is located between the air outlets of the two aquaculture systems. This ensures independent air intake and exhaust, and the equipment structure is simple and easy to operate. The above structural design makes full use of a single feeding channel and minimizes the volume occupied by non-aquaculture areas within a single air duct, thereby improving ventilation efficiency. Moreover, if the air intake and exhaust are located at opposite ends of the air duct, most of the air intake air can return to the exhaust vent via the aquaculture system, ensuring full utilization of the airflow. Of course, this application does not exclude the possibility of adjacent aquaculture systems sharing a single air outlet.

[0071] Example 6:

[0072] The difference from the above embodiment is that the feeding channel is provided with openable and closable partition components 9 at both ends. Regardless of whether the aquaculture system is provided on one or both sides of the feeding channel, openable and closable partition components can be provided at both ends of the feeding channel. The partition components can be selected as openable and closable doors, so that after feeding is completed, both ends of the feeding channel can be closed, thereby minimizing the impact of the feeding channel on ventilation in the air duct.

[0073] Example 7:

[0074] The difference from the above embodiments lies in the fact that the height of the guide zone between each breeding layer in the described breeding system gradually decreases from the guide zones at the top and bottom ends to the middle guide zone. To reduce the situation of excessive airflow in the middle and insufficient airflow at the top and bottom due to the "edge effect," this application designs the height of the guide zone in each layer to decrease in a gradient from the guide zones at the top and bottom to the middle guide zone. This makes the guide zones at the top and bottom edges larger than the guide zone in the middle, thereby compensating for the edge effect and ensuring that the ventilation volume between layers is as uniform as possible. For example, the guide zone height of the 3rd middle layer is 100mm; the guide zone height of the 1st and 5th upper and lower layers is 150mm.

[0075] Example 8:

[0076] The difference from the above embodiment lies in that at least one of the air inlet ends of the breeding layer is connected to an air inlet guide plate 81 or a layered louver with an adjustable angle between the plate surface and the upper surface of the breeding layer. The air inlet guide plate is a straight plate, a perforated plate, and / or an arc-shaped plate; and / or the air inlet end of each layer of the guide zone is respectively provided with a butterfly valve or a multi-leaf regulating valve for controlling the air volume. By setting the air inlet guide plate or the layered louver with adjustable angle, the opening size of the air inlet end of each corresponding layer of the guide zone can be adjusted to adjust the air volume. For example, the opening degree of the upper and lower layers is large, and the opening degree of the middle layer is small, thereby balancing the air volume between each layer to achieve a uniform and controllable breeding speed between each layer. The air inlet guide plate 81 or the layered louver can be directly set at the front end of the breeding system or set on the wall of the air duct or installed on a separate frame inside the air duct.

[0077] Example 9:

[0078] The difference from the above embodiments is that the feeding channel is equipped with a windbreak device for adjusting the wind resistance of the feeding channel. This device can adjust the wind resistance of the feeding channel to a sufficiently high level so that the wind speed passing through the guide zone is fast enough without affecting the various materials or devices passing through the feeding device.

[0079] The wind-blocking device includes a flow-limiting baffle 82 supported on the side of the feeding channel away from the aquaculture system, with its free end extending into the feeding channel, and / or a flexible strip-shaped wind-blocking curtain 821 hanging from the top of the air duct and capable of dividing the air duct. The wind-blocking curtain can be a single piece or multiple pieces arranged sequentially along the length of the air duct. The wind-blocking curtain allows the feeder to pass through, but after the feeder has passed, it hangs down to restrict airflow. The flow-limiting baffle can be a straight plate, a perforated plate, and / or an arc-shaped plate, and there can be one or more flow-limiting baffles. Alternatively, the flow-limiting baffle can also be an arc-shaped guide plate, thereby generating vortices in the airflow, increasing flow resistance, and simultaneously reflecting some airflow to the middle of the shelf. For example, when the radius of the arc surface of the plate is 50mm, the edge airflow resistance can increase by 40%.

[0080] The cross-section of the air duct extends laterally beyond the cross-section of the farming surface, meaning it extends beyond the lateral portion of the farming system, such as the feeding channel. During ventilation, two air ducts are formed: one outside the stacked farming surface and one inside. Because of the high airflow resistance inside the stacked farming surface, the airflow velocity is slow, resulting in higher air pressure. Conversely, the air ducts outside the stacked farming surface have low airflow resistance, resulting in high airflow velocity and lower air pressure. This creates a high-pressure zone within the stacked farming racks, with a small pressure difference between the air inside and the air inlet, making it difficult for air to enter. Meanwhile, the air ducts outside the stacked farming surface have lower air pressure, allowing outside air to easily enter. This results in less and slower airflow inside the stacked farming racks, while more and faster airflow outside. Consequently, the airflow velocity on the stacked farming surface is slow, leading to a lower evaporation rate.

[0081] Therefore, the proportion of the feeding channel can be reduced as much as possible, or flow-limiting baffles can be set up as mentioned above to increase wind resistance, so that the wind resistance in the guide zone and the feeding channel tends to be balanced.

[0082] Example 10:

[0083] The difference from the above embodiments is that a blower 83 is provided on the air inlet and / or in front of the air inlet corresponding to the aquaculture system. This application may also include an auxiliary fan, i.e., a blower, to actively guide airflow into the airflow area.

[0084] Install small axial flow fans in the open area in front of the breeding shelves, with the airflow directed directly towards the center of the shelves, overlapping with the airflow from the main air duct. The auxiliary fan's air pressure must match the main air duct's air pressure; for example, if the main air duct's air pressure is 100 Pa, the auxiliary fan's air pressure should be 80-120 Pa to avoid airflow collision. Air pressure sensors can be installed inside the air ducts for monitoring.

[0085] Example 11:

[0086] The difference from the above embodiment lies in that a flow equalization plate 57 for guiding airflow to the next aquaculture layer is provided at the top of the flow guide zone, i.e., at the bottom of the upper aquaculture layer. This flow equalization plate is arranged along the width direction of the aquaculture layer. That is, the flow equalization plate guides the incoming airflow to the aquaculture tank, thereby fully utilizing the incoming airflow to carry away water vapor and exhaust gas. This allows the air to flow more effectively on the aquaculture surface, i.e., the evaporation surface.

[0087] A breeding system includes multiple breeding layers 5 and a flow guide zone 51 located between the upper and lower breeding layers. Each breeding layer includes a conveyor belt 52, skirts 53 on both sides of the conveyor belt, and a breeding trough formed by the conveyor belt and skirts. The conveyor belt has skirts at both ends that connect to the skirts on both sides. This application uses a conveyor belt for breeding, with the skirts and conveyor belt forming the breeding trough. The overall structure is simple, and material discharge is convenient. Initially, feeding can be done only at the end of the conveyor belt, and feeding continues as the conveyor belt moves until the skirt at one end reaches the other end, completing the feeding process. When adult insects need to be collected, there is no need for lifting or vibration; simply rotating the conveyor belt conveys the adult insects out. A cleaning scraper 04 can be installed at the outlet end, either in front of or below the conveyor belt. The cleaning scraper can be mounted on the main support to scrape away all the insect material on the conveyor belt, making insect collection convenient. The entire breeding and collection operation is convenient, the simplified structure is more suitable for controlled airflow within the duct, and it is low-cost and easy to maintain.

[0088] Example 12:

[0089] The difference from the above embodiment is that one side of the conveyor belt is directly mounted on the air duct wall 1 or on the main support 54 via a conveyor roller 55 that is sleeved onto the conveyor belt. The main support is erected inside the air duct 2 or directly mounted on the air duct wall. The other side of the conveyor belt forms a suspended feeding channel 6, which is connected to the guide zone and allows the feeding equipment to extend into the guide zone through the feeding channel to feed the aquaculture tank. The suspended feeding channel facilitates the perforated feeding rod 03 or other extended feeding components on the feeding equipment to directly extend above the aquaculture tank for feeding, while moving along the length of the aquaculture system. This not only simplifies the aquaculture system structure but also simplifies the feeding equipment and makes feeding more convenient.

[0090] Example 13:

[0091] The difference from the above embodiment is that a conveyor belt is provided on one or both sides of the main support, and a partition 7 is provided on the outer side of the skirt on the conveyor belt. The skirt has a certain degree of flexibility. To ensure that the material does not overturn the skirt after feeding, the partition can provide rigid protection for the outer side of the skirt. At least one conveyor roller 55 is provided on the main support at each end of the conveyor belt, and at least one of the conveyor rollers is driven by a motor to rotate, thereby moving the conveyor belt. The partition is located at the outer end of the conveyor roller. Since the conveyor belt is long, multiple auxiliary support conveyor rollers can be arranged sequentially along the length of the conveyor belt on the main support, and a support plate fixed on the main support is set between the conveyor rollers to support the breeding surface on the conveyor belt. The partition can be connected to the outer side of the conveyor roller and / or the support plate. A cleaning scraper can be set on the main support or the support plate.

[0092] This application can be formed by a main support frame and a set of aquaculture layers, or it can be that a set of aquaculture layers is set on each side of the main support frame.

[0093] Example 14:

[0094] The difference from the above embodiment is that each side of the main support has a set of aquaculture systems, and the top of adjacent main support sets is connected by connecting ribs 56. The main support has air duct walls that separate the aquaculture systems on both sides into two air ducts. This structural design simplifies and optimizes the entire active frame while ensuring support strength. Main supports can be shared in rows within the same aquaculture area, resulting in less space occupied by the equipment, simplified equipment components, and lower costs. The air duct systems share the same main support.

[0095] Example 15:

[0096] The difference from the above embodiment lies in that the main support is equipped with a flow equalization plate 57 located below the conveyor belt to guide the airflow into the aquaculture tank. This flow equalization plate is arranged along the width direction of the conveyor belt. That is, by guiding the incoming airflow into the aquaculture tank through the flow equalization plate, the incoming airflow can be fully utilized to carry away water vapor and exhaust gas. This allows the air to flow more effectively on the aquaculture surface, i.e., the evaporation surface.

[0097] Example 16:

[0098] The difference from the above embodiments is that the aquaculture system is divided into a main aquaculture system 051 and a secondary aquaculture system 052. The conveyor belt of the secondary aquaculture system is shorter than the conveyor belt of the main aquaculture system. The front ends of the multiple conveyor belts of the secondary aquaculture system extend into the guide area at the rear end of the conveyor belt of the main aquaculture system.

[0099] In insect farming, such as black soldier fly farming, larvae need to be raised in small breeding trays. After they reach a suitable size, the frass needs to be separated and then evenly distributed onto the final large breeding equipment. Since the larvae are generally concentrated at the bottom, if the frass is not separated before feeding the larvae, it will result in uneven feeding. If the larvae are mixed evenly before feeding, it will affect the survival rate of the larvae. Therefore, the current method is to raise the larvae separately, separate the frass, and then feed them onto the final breeding equipment for expansion. This method is relatively troublesome and requires two breeding environments. The larval breeding also produces a lot of odor, and the separation of frass is troublesome.

[0100] This application employs a one-to-one coordination between the main breeding system (terminal breeding equipment) and the secondary breeding system (larval rearing equipment), placing both larval and adult breeding within a single breeding space. Since conveyor belts are used as breeding trays throughout, the conveyor speeds of the main and secondary breeding systems can be adjusted after larval rearing. This ensures that the conveyor belt in the secondary breeding system uniformly transports the larvae and excrement to the conveyor belt in the main breeding system. When the conveyor belt in the secondary breeding system finishes its transport, the conveyor belt in the main breeding system has completed half a rotation, and the breeding area of ​​the main breeding system is fully covered as needed. This eliminates the steps of separating excrement and manual transfer, saves breeding space, and makes operation more precise and convenient. Larvae are virtually undamaged when transferred to the main breeding system. The secondary breeding system can also be designed to be movable, allowing it to be moved away from the main breeding system after larvae have been introduced, enabling efficient and controllable breeding of adults within a separate, air-conditioned duct containing only the main breeding system.

[0101] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A wind tunnel aquaculture system, characterized in that: The system includes an air duct (2) enclosed by an air duct wall (1) and at least one aquaculture system (05) located within the air duct. The air duct includes an air inlet (21) and an air outlet (22), which are located at opposite ends of the air duct. The aquaculture system includes one or more aquaculture layers (5), and a flow guide zone (51) is provided above or between the aquaculture layers. The flow guide zone is connected to the air duct, and the airflow direction in the area corresponding to the aquaculture system in the air duct is consistent with the length or width direction of the flow guide zone. An exhaust fan is provided on the air outlet to form an exhaust end.

2. The aquaculture system according to claim 1, characterized in that: The bottom of the air duct is provided with a plurality of secondary air inlets (211) in sequence along the length of the air duct.

3. A wind tunnel aquaculture system according to claim 1 or 2, characterized in that: The air duct is equipped with a feeding channel (3), and a breeding system is provided on one side or on both sides of the feeding channel.

4. The aquaculture system according to claim 3, characterized in that: The feeding channel is connected to the guide zone.

5. The aquaculture system according to claim 4, characterized in that: The feeding channel is equipped with a breeding system on both sides, and each breeding system on each side has at least one corresponding air outlet. The feeding channel is located between the air outlets of the two breeding systems.

6. The aquaculture system according to claim 4, characterized in that: The feeding channel is equipped with openable and closable baffles at both ends.

7. The aquaculture system according to claim 2, characterized in that: In the aforementioned aquaculture system, the height of the guide zone between each aquaculture layer gradually decreases from the guide zones at the top and bottom to the guide zone in the middle.

8. The aquaculture system according to claim 2, characterized in that: At least one of the two ends of the aquaculture layer is connected to an air inlet guide plate (81) or a layered louver with an adjustable angle between the plate surface and the upper surface of the aquaculture layer. The air inlet guide plate is a straight plate, a perforated plate and / or an arc-shaped plate; and / or the air inlet end of each layer of the guide zone is provided with a butterfly valve or a multi-leaf regulating valve for controlling the air volume.

9. The aquaculture system according to claim 4, characterized in that: The feeding channel is equipped with a wind-blocking device for adjusting the wind resistance of the feeding channel, and a flow-limiting baffle (82) with its free end extending into the feeding channel is supported on the side of the feeding channel away from the breeding system.

10. The aquaculture system according to claim 9, characterized in that: The windbreak device includes a flow-limiting baffle (82) supported on the side of the feeding channel away from the aquaculture system and with its free end extending into the feeding channel. The flow-limiting baffle is a straight plate, a perforated plate, and / or an arc-shaped plate.

11. The aquaculture system according to claim 9, characterized in that: The windbreak device includes a flexible windbreak curtain (821) that hangs on the top of the air duct and can divide the air duct. The windbreak curtain is one or multiple curtains arranged sequentially along the length of the air duct.

12. A wind tunnel aquaculture system according to claim 1 or 2, characterized in that: A blower (83) is provided on the air inlet and / or in front of the air inlet corresponding to the aquaculture system.

13. The aquaculture system according to claim 1, characterized in that: The top of the flow guiding zone, which is located at the bottom of the upper aquaculture layer, is provided with a flow equalization plate (57) for guiding the airflow to the lower aquaculture layer. The flow equalization plate is arranged along the width direction of the aquaculture layer.

14. A farming system, characterized in that: It includes a multi-layered aquaculture layer (5), a flow guide zone (51) located between the upper and lower aquaculture layers, wherein the aquaculture layer includes a conveyor belt (52), skirts (53) located on both sides of the conveyor belt, and an aquaculture trough formed by the conveyor belt and the skirts.

15. The aquaculture system according to claim 14, characterized in that: One side of the conveyor belt is directly mounted on the air duct wall (1) or on the main support (54) via a conveyor roller (55) that is connected to the conveyor belt. The main support is erected in the air duct (2). The other side of the conveyor belt is suspended to form a feeding channel (6). The feeding channel is connected to the guide zone and is used to allow the feeding equipment to extend into the guide zone through the feeding channel to feed the aquaculture tank.

16. The aquaculture system according to claim 15, characterized in that: The main support is provided with a conveyor belt on one or both sides, and a partition (7) is provided on the outer side of the skirt of the conveyor belt. At least one conveyor roller (55) is provided on the main support at each end of the conveyor belt, and at least one of the conveyor rollers is driven to rotate by a motor to move the conveyor belt. The partition is located at the outer end of the conveyor roller.

17. The aquaculture system according to claim 15, characterized in that: Each side of the main support is provided with a breeding system, and the top of the two adjacent main supports is connected by a connecting rib (56). The main support is provided with a duct wall that separates the breeding systems on both sides into two air ducts.

18. The aquaculture system according to claim 14, characterized in that: The conveyor belt has skirts at both ends that connect to the side skirts.

19. The aquaculture system according to claim 15, characterized in that: The main support is provided with a flow equalization plate (57) located below the conveyor belt for guiding airflow to the aquaculture tank. The flow equalization plate is arranged along the width direction of the conveyor belt.

20. A farming system according to any one of claims 14-19, characterized in that: The aquaculture system is divided into a main aquaculture system (051) and a secondary aquaculture system (052). The conveyor belt of the secondary aquaculture system is shorter than the conveyor belt of the main aquaculture system. The front ends of multiple conveyor belts of the secondary aquaculture system extend into the guide zone at the rear end of the conveyor belt of the main aquaculture system.

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