An environmental protection device and method for odor control in livestock and poultry farms

Abstract

This invention relates to the field of odor control devices, specifically an environmentally friendly odor control device and method for livestock and poultry farms. It includes a water tank, an outer shell mounted on the water tank, and a fan mounted on top of the outer shell. A water spray mechanism is installed inside the outer shell; an activated carbon adsorption mechanism is also installed inside the outer shell, and an odor detection device is installed on the activated carbon adsorption mechanism to detect the deodorization effect of the airflow after passing through the water spray mechanism. If the deodorization effect is insufficient, the structure is adjusted to allow the airflow to pass through the activated carbon adsorption area; if the deodorization effect is sufficient, the airflow passes directly through. An airflow sensor is installed at the air outlet of the fan to detect the airflow volume. If the airflow volume is less than a set value, the fan is activated, and the fan speed is adjusted according to the detected airflow volume and the designed airflow volume. This invention achieves comprehensive optimization of odor control in livestock and poultry farms in terms of effectiveness, cost, energy consumption, maintenance, and adaptability, providing a highly efficient, economical, reliable, and easy-to-maintain environmentally friendly odor control solution.

Description

Technical Field

[0001] This invention relates to the field of odor control devices, and in particular to an environmentally friendly odor control device and method for livestock and poultry farms. Background Technology

[0002] With the rapid development of livestock and poultry farming towards large-scale and intensive operations, environmental management of farms has increasingly become a focus of industry and societal concern. During the farming process, large amounts of complex odorous gases containing ammonia, hydrogen sulfide, and volatile organic compounds are generated. These odors not only directly affect the air quality inside and around the farms, posing a potential threat to the health of farmers and animals, but may also spread to nearby residential areas, triggering environmental pollution complaints and social conflicts, thus hindering the sustainable development of the livestock industry.

[0003] Common deodorization equipment includes deodorizers, which are directly connected to the exhaust fan of the livestock shed to forcibly treat high-concentration odorous gases discharged from the fan. Deodorizers are available in passive and active types. Passive deodorizers do not have a built-in fan and are directly connected to the livestock shed's fan. Passive deodorizers rely entirely on the airflow and pressure of the upstream livestock shed fan; when fan performance fluctuates or the resistance of the deodorization structure increases, the deodorization effect is poor. Active deodorizers have a built-in fan, but this fan is constantly running, resulting in high energy consumption. Furthermore, if the existing livestock shed's fan power is high, the built-in fan's operation leads to repeated energy consumption and waste. The fixed speed of the active fan also cannot be flexibly adjusted according to actual airflow needs. Additionally, the main deodorization process of deodorizers involves the odorous gas sequentially passing through a water spray mechanism and a deodorization plate (a plate-like structure with high porosity), which cannot guarantee a consistent deodorization effect. Summary of the Invention

[0004] The purpose of this invention is to address the problems of unreliable odor treatment effects and the inflexible adjustment of built-in fans in the prior art, and to propose an environmental protection device and method for odor control in livestock and poultry farms.

[0005] On one hand, this invention proposes an environmental protection device for odor control in livestock and poultry farms, including a water tank, an outer shell mounted on the water tank, and a fan mounted on the top of the outer shell. An air inlet is provided on one side of the outer shell, and a water spray mechanism is provided inside the outer shell, through which odor continues to move upward. An activated carbon adsorption mechanism is provided inside the outer shell, located above the water spray mechanism. An odor detection device is provided on the activated carbon adsorption mechanism to detect the deodorization effect of the airflow after passing through the water spray mechanism. If the deodorization effect is not up to standard, the structure is adjusted to allow the airflow to pass through the activated carbon adsorption area. If the deodorization effect is up to standard, the airflow passes directly through and is discharged upward by the fan. An air volume sensor is provided at the air outlet of the fan to detect the air volume. If the air volume is less than a set value, the fan is turned on, and the fan speed is adjusted according to the detected air volume and the designed air volume to ensure that the air volume is not lower than the designed air volume.

[0006] Preferably, multiple columns are vertically installed inside the water tank. The water spraying mechanism includes a water spray plate installed on the columns, a water pump installed inside the water tank, and a return water pipe connected to the water outlet of the water pump. A crisscrossing pipe system is installed inside the water spray plate. The pipe system is connected to the return water pipe. Multiple water outlets are provided in the pipe system. Water drips into the water tank after passing through the water spray plate. An inlet pipe is installed on the water tank.

[0007] Preferably, multiple vertical columns are installed inside the water tank. The activated carbon adsorption mechanism includes a functional plate installed on the columns, two boxes installed through the functional plate, multiple water-separating plates installed alternately and inclined downward on the inner wall of the boxes, a sliding plate installed above the functional plate, and a relief groove installed on the sliding plate and activated carbon located on both sides of the relief groove. The sliding plate moves so that the two activated carbons cover the top outlet of the two boxes, allowing the airflow to pass through the activated carbon to continue moving upward.

[0008] Preferably, a threaded section is provided at the top of the column, and a limiting nut is provided on the threaded section. When the limiting nut is rotated to the bottom of the threaded section, the functional plate falls on the limiting nut.

[0009] Preferably, the function plate is provided with an installation groove, the installation groove is provided with a rodless cylinder, the sliding part of the rodless cylinder is provided with a limit rod, the slide plate is provided with a limit frame, and the limit frame is provided with a limit hole for the limit rod to pass through.

[0010] Preferably, the functional board has a cavity, and a control box, odor detection device a and odor detection device b are installed in the cavity. The detection end of odor detection device a is located below the functional board, and the detection end of odor detection device b is located inside the box. The control box is equipped with a control system.

[0011] On the other hand, this invention proposes a method for environmentally friendly treatment of odor from livestock and poultry farms, comprising the following steps: S1. Installation: Seal and connect the air inlet of the device casing to the air outlet of the farm's exhaust fan. Power on the device, initialize the control system, turn off the fan by default, place the slide plate in the bypass position, and do not activate the activated carbon adsorption mechanism. Fill the water tank with an appropriate amount of water or treatment solution. S2, Start-up: The farm's fan starts, and the odorous air is drawn into the device and enters through the air inlet on the outer casing. The airflow first enters the space above the water tank and is then forced to flow upward, passing through the water spray mechanism. When the airflow passes through the water curtain, the first stage of deodorization is completed. S3. Gas-water separation and detection: The airflow first enters the box and collides with the staggered inclined water baffles to achieve gas-water separation, making the subsequent airflow relatively dry. At the same time, odor detection device a and odor detection device b monitor the gas composition after water spraying and gas-water separation in real time. S4. Intelligent Decision-Making and Secondary Processing: The control system receives data from odor detection device a and odor detection device b and compares it with a preset threshold. If the data meets the standard, the slide plate continues to be kept in the bypass position, and the airflow bypasses the activated carbon and enters the upper cavity. If the data does not meet the standard, the slide plate moves, so that the two hydrophobic high-efficiency activated carbons accurately cover the top openings of the two boxes, and the airflow is forced to pass through the activated carbon layer. S5. Airflow Guarantee and Final Discharge: All airflow converges in the upper cavity of the device. The airflow sensor continuously monitors the flow rate of the final discharged airflow. The control system controls the fan operation status based on the detected airflow flow rate.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: 1. High efficiency and energy saving, significantly reducing operating costs: By installing an odor detection device after the water spray treatment unit, the gas composition after primary treatment is monitored in real time. Only when indicators such as ammonia, hydrogen sulfide, or volatile organic compounds exceed the standard will the high-efficiency activated carbon adsorption layer be activated through the sliding mechanism for deep treatment. Most of the time, the airflow can bypass the filter, avoiding unnecessary adsorption loss of activated carbon, significantly extending the service life of the expensive high-efficiency activated carbon filter media, and reducing the material and labor costs caused by frequent replacement. An air volume sensor is installed at the final emission end and linked with the auxiliary fan built into the device. In most cases, the device can rely entirely on the power of the farm's original fan to achieve zero additional power consumption for deodorization. It is only used as a booster when necessary. Compared with traditional continuously operating active deodorizers, the overall energy saving effect can reach more than 50%, which is extremely economical. 2. Stable and reliable treatment effect, achieving intelligent graded purification: Through a two-stage treatment architecture of water spraying and activated carbon, combined with real-time quality detection for intelligent switching, it is ensured that no matter how the inlet odor concentration fluctuates, the odor index of the final emission gas can be effectively controlled. 3. Easy to install, maintain and replace parts: Key components such as water spray plate, functional plate and activated carbon slide plate adopt standardized connection methods such as columns, support plates, clips and bolts, and are designed with special operating doors, which makes the installation, disassembly and maintenance process extremely convenient, greatly reducing maintenance difficulty and downtime. 4. Strong synergy with existing facilities in the farm and wide adaptability: This device can be used as a passive device, relying entirely on the farm's fans for operation; or it can be powered by its own fans when needed. This flexible operating mode makes it widely adaptable to farms of different sizes and with different fan configurations. It can be easily applied to both new projects and the renovation and upgrading of existing facilities. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the internal structure of the outer shell; Figure 3 for Figure 2 A structural diagram from another perspective; Figure 4 This is a schematic diagram of the activated carbon adsorption mechanism; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 for Figure 4 A sectional view; Reference numerals: 1. Water tank; 2. Outer shell; 3. Column; 4. Water spray mechanism; 5. Activated carbon adsorption mechanism; 6. Fan; 7. Air volume sensor; 8. Porous support plate; 9. Water spray plate; 10. Water pump; 11. Return water pipe; 12. Drain pipe; 13. Valve; 14. Limit nut; 15. Functional plate; 16. Strip groove; 17. Box body; 18. Flanged retaining ring; 19. Fixing plate; 20. Countersunk hole; 21. Water-separating plate; 22. Slide plate; 23. Limiting frame; 24. Rodless cylinder; 25. Limiting rod; 26. Mounting groove; 27. Clearance groove; 28. Activated carbon; 29. ​​Guide rod; 30. Control box; 31. Odor detection device a; 32. Odor detection device b; 33. Sealing plate; 34. Guide enlargement hole; 35. Vertical groove. Detailed Implementation

[0014] Example 1; as Figures 1-3As shown, the present invention proposes an environmental protection device for odor control in livestock and poultry farms, comprising a water tank 1, an outer shell 2 mounted on the water tank 1, and a fan 6 mounted on top of the outer shell 2. The fan 6 is a waterproof and explosion-proof fan that drives the airflow upwards for discharge. An air inlet is provided on one side of the outer shell 2 and connected to the air outlet of the farm fan. A water spray mechanism 4 is provided inside the outer shell 2, through which the odor continues to move upwards. An activated carbon adsorption mechanism 5 is provided inside the outer shell 2, located above the water spray mechanism 4. An odor detection device is provided on the activated carbon adsorption mechanism 5 to detect the deodorization effect of the airflow after passing through the water spray mechanism 4. If the deodorization effect is not up to standard, the structure is adjusted to allow the airflow to pass through the activated carbon adsorption mechanism 4. In the activated carbon adsorption area, if the deodorization effect meets the standard, the airflow passes directly through and is discharged upwards by the fan 6. The activated carbon used in the activated carbon adsorption area is hydrophobic high-efficiency activated carbon. This activated carbon is treated with a special coating, such as a silica gel layer, or is hydrophobically treated during the manufacturing process, which can significantly reduce its affinity for water. An air volume sensor 7 is installed at the air outlet of the fan 6 to detect the air volume. If the air volume is less than the set value, the fan 6 is turned on, and the fan speed is adjusted according to the detected air volume and the designed air volume to ensure that the air volume is not lower than the designed air volume. To illustrate with a specific example: Suppose the ventilation requirement of a farm shed is designed to be 10,000 m³ / h, with ten ventilation fans, each with a ventilation capacity of 1,000 m³ / h. This is the minimum air volume requirement to ensure normal ventilation of the shed and prevent the accumulation of harmful gases. In the initial state, the air inlet of the equipment is connected to the original fans of the farm, and the fan 6 is in the default closed state. The airflow is entirely driven by the farm fans, and the air volume sensor 7 detects the actual air volume in real time. Scenario 1: The farm's fan has sufficient power to overcome the total resistance inside the casing 2, and the actual airflow detected by the airflow sensor 7 is greater than 1000. Scenario 1: When the system outputs m³ / h, fan 6 is turned off, and the equipment operates in passive mode, achieving zero additional consumption. Scenario 2: Due to increased resistance caused by the activation of the activated carbon adsorption layer, blockage of the water spray plate, or dampness of the filter material, the total system resistance increases significantly. The air volume sensor 7 detects that the actual air output drops below 1000 m³ / h, which is lower than the set value. The control system starts fan 6 and adjusts the fan speed according to the actual air volume to make the actual air output greater than 1000 m³ / h. After reaching a balance, the control system stabilizes fan 6 at the current speed. Scenario 3: When fan 6 is running, after a period of time, if the water spray plate is cleaned or the activated carbon layer is bypassed, the system resistance decreases. The actual air output is detected to exceed 1000 m³ / h, which is higher than the set value. At this time, the control system gradually reduces the fan speed of fan 6 until the actual air output stabilizes at 1000 m³ / h. If the resistance decreases sufficiently, fan 6 can be turned off completely, returning to Scenario 1. This closed-loop airflow control system ensures that no matter how the operating conditions of the front-end farm fan change, or how the internal resistance of the equipment fluctuates, the final airflow will never be lower than the ventilation guarantee value required by the design, thus achieving maximum energy saving while meeting ventilation needs.

[0015] Example 2; as Figures 1-3 As shown, this invention proposes an environmental protection device for odor control in livestock and poultry farms. Compared to Embodiment 1, this embodiment details the structure of the water spray mechanism 4. Specifically, multiple vertical columns 3 are installed inside the water tank 1. The water spray mechanism 4 includes a water spray plate 9 installed on the columns 3, a water pump 10 installed inside the water tank 1, and a return water pipe 11 connected to the outlet of the water pump 10. A crisscrossing pipe system is installed inside the water spray plate 9, and the pipe system is connected to the return water pipe 11. Multiple water outlets are provided in the pipe system. Water drips into the water tank 1 after passing through the water spray plate 9. A water inlet pipe is installed. For ease of installation, multiple columns 3 are equipped with perforated support plates 8, and multiple guide holes are provided on the water spray plate 9 for the columns 3 to pass through. The water spray plate 9 can be moved downwards and pressed onto the perforated support plates 8. A drain pipe 12 is also provided at the bottom of the water spray plate 9, and a valve 13 is provided on the drain pipe 12. The drain pipe 12 is used to drain the water in the water spray plate 9, and the valve 13 is normally closed during deodorization. The odor can be removed by water bath or spraying, which can remove a large amount of water-soluble gases such as ammonia and hydrogen sulfide. This structure is commonly used in existing deodorization machines for livestock farms, and will not be described in detail here.

[0016] Example 3; as Figures 2-6 As shown, this invention proposes an environmental protection device for odor control in livestock and poultry farms. Compared to Embodiment 2, this embodiment details the structure of the activated carbon adsorption mechanism 5. Specifically, multiple vertical columns 3 are installed inside the water tank 1. The activated carbon adsorption mechanism 5 includes a functional plate 15 installed on the columns 3, two boxes 17 installed through the functional plate 15, multiple water-blocking plates 21 installed alternately and inclined downwards on the inner wall of the boxes 17, a sliding plate 22 installed above the functional plate 15, and clearance grooves 27 installed on the sliding plate 22 and activated carbon 28 located on both sides of the clearance grooves 27. The sliding plate 22 moves so that the two activated carbon 28 cover the top outlets of the two boxes 17, allowing airflow to pass through the activated carbon 28 to continue. Moving upwards; specifically, two vertically penetrating strip grooves 16 are provided on the functional plate 15, and the box body 17 is inserted into the strip grooves 16. A groove is provided around the outside of the strip grooves 16 on the top surface of the functional plate 15. A flange retaining ring 18 is provided on the top of the box body 17, and the flange retaining ring 18 is inserted into the groove. A fixing plate 19 is provided on the flange retaining ring 18, and a countersunk hole 20 is provided on the fixing plate 19. The fixing plate 19 is connected to the functional plate 15 by bolts, with the bolt head located in the countersunk hole. The sliding plate 22 presses on the flange retaining ring 18. Multiple water-separating plates 21 arranged in an alternating manner can adsorb tiny water droplets in the airflow and mix them into water droplets that fall onto the water spray mechanism 4, ensuring that the gas passing through the activated carbon 28 is in a relatively dry state.

[0017] Furthermore, a threaded section is provided at the top of the column 3, and a limiting nut 14 is provided on the threaded section. When the limiting nut 14 is rotated to the bottom of the threaded section, the functional plate 15 falls on the limiting nut 14, which makes disassembly and assembly very convenient.

[0018] Furthermore, the functional plate 15 is provided with a mounting groove 26, and a rodless cylinder 24 is installed in the mounting groove 26. A limiting rod 25 is installed on the sliding part of the rodless cylinder 24. A limiting frame 23 is installed on the slide plate 22, and a limiting hole is provided on the limiting frame 23 for the limiting rod 25 to pass through. Multiple guide rods 29 are provided on the inner wall of the outer shell 2. The guide rods 29 are threadedly connected to the outer shell 2 for easy disassembly. Multiple guide holes are provided on the slide plate 22 opposite to the guide rods 29. A guide enlargement hole 34 is provided at the end of the guide hole near the guide rod 29. The upper part is equipped with an openable operating door via a hinge, which facilitates the insertion of the slide plate 22. When inserting, the cooperation of the limiting rod 25 and the limiting frame 23 indicates that the slide plate 22 is in place. Because the two sides of the slide plate 22 are limited by contact with the inner wall of the outer shell 2, the guide rod 29 is not inserted into the guide expansion hole 34 at this time. When the rodless cylinder 24 moves the slide plate 22, the guide rod 29 immediately inserts into the guide expansion hole 34 and then into the guide hole, ensuring the stability of the slide plate 22 during movement and not affecting the removal and insertion of the slide plate 22.

[0019] Example 4; as Figure 4 and Figure 6As shown, this invention proposes an environmental protection device for odor control in livestock and poultry farms. Compared to Embodiment 3, this embodiment details the electrical control structure. Specifically, the functional board 15 has a cavity, within which a control box 30, an odor detection device a31, and an odor detection device b32 are installed. The detection end of odor detection device a31 is located below the functional board 15, and the detection end of odor detection device b32 is located inside the housing 17. The cavity forms an opening on one side of the functional board 15, and a sealing plate 33 is installed on the opening to facilitate the assembly and disassembly of the housing 17. A vertical groove 35 is provided on the housing 17, through which the detection end of odor detection device b32 passes. To prevent gas from directly passing through the vertical groove 35, a baffle is installed on the inner wall of the strip groove 16. The baffle fits precisely in the vertical groove 35 and contacts the water-proof plate 21 to form a seal. A control system is installed inside the control box 30. The system is connected to the airflow sensor 7, odor detection device a31, and odor detection device b32 for data transmission. The control system is also connected to the rodless cylinder 24 and the fan 6 for control. In this embodiment, odor detection devices a31 and b32 integrate ammonia, hydrogen sulfide, and total volatile organic compound (TVOC) sensors, respectively, to detect ammonia, hydrogen sulfide, and TVOC concentrations. If these concentrations exceed set values, the activated carbon adsorption process is initiated. For example, consider the odor concentration thresholds: ammonia concentration is limited to 2 ppm, hydrogen sulfide concentration to 1 ppm, and TVOC concentration to 10 mg / m³. If odor detection device a31 or b32 detects data showing ammonia concentration of 1 ppm and hydrogen sulfide concentration of 0.5 ppm... With a TVOC concentration of 5 mg / m³, all values ​​are below the set limits. The slide plate 22 moves to the "bypass" position, saving activated carbon consumption and reducing system air resistance. If any value exceeds the limit, the control system determines that the deodorization effect is insufficient. The rodless cylinder 24 drives the slide plate 22 to move, causing the activated carbon 28 loaded on the slide plate 22 to move above the top opening of the box 17, completely covering the opening. At this point, the airflow must pass through the activated carbon 28 on both sides to continue upwards. High-efficiency activated carbon is only activated for deep treatment when necessary, greatly optimizing operating costs and extending the activated carbon replacement cycle. It should be noted that activating the activated carbon layer increases system resistance and may trigger the aforementioned airflow regulation logic, automatically starting or adjusting the speed of the fan 6 to maintain airflow.

[0020] Example 5; The present invention proposes a method for environmentally friendly control of odor in livestock and poultry farms, which uses the odor control device for livestock and poultry farms described in Example 4, and specifically includes the following steps: S1. Installation: Seal and connect the air inlet of the device housing 2 to the air outlet of the farm exhaust fan. Power on the device, initialize the control system, turn off the fan 6 by default, put the slide plate 22 in the bypass position, and the activated carbon adsorption mechanism 5 is not activated. Add an appropriate amount of water or treatment solution to the water tank 1. S2, Start-up: The farm's fan starts, and the odorous air is drawn into the device and enters through the air inlet of the outer casing 2. The airflow first enters the space above the water tank 1, and then is forced to flow upward, passing through the water spray mechanism 4. When the airflow passes through the water curtain, it comes into full contact with and mixes with the water. Most of the water-soluble odorous gases such as ammonia and hydrogen sulfide are absorbed and dissolved by the water, completing the first stage of deodorization treatment. S3. Gas-water separation and detection: The airflow first enters the box 17 and collides with the staggered inclined water baffles 21. The tiny water droplets carried in the airflow hit the surface of the water baffles under the action of inertia, gather into larger water droplets and flow down the surface of the baffles, flowing back to the water spraying mechanism 4 or the water tank 1 to achieve gas-water separation, so that the subsequent airflow is relatively dry. At the same time, the odor detection device a31 and the odor detection device b32 monitor the gas composition after water spraying and gas-water separation in real time. S4. Intelligent Decision-Making and Secondary Processing: The control system receives data from odor detection devices a31 and b32 and compares it with preset thresholds. If the data meets the standards, the slide plate 22 remains in the bypass position, and the airflow bypasses the activated carbon 28 and enters the upper cavity. If the data does not meet the standards, the control rodless cylinder 24 is activated to drive the slide plate 22 to move, so that the two hydrophobic high-efficiency activated carbons precisely cover the top openings of the two boxes 17. The airflow is forced to pass through the activated carbon layer, where volatile organic compounds and other residual odor molecules are deeply adsorbed and purified by the activated carbon. After treatment, the airflow enters the upper cavity. S5. Airflow Guarantee and Final Discharge: All airflow converges in the upper cavity of the device. The airflow sensor 7 continuously monitors the flow rate of the final discharged airflow. The control system controls the operation of the fan 6 based on the detected airflow. Specifically, if the measured airflow meets the standard, the fan 6 remains off, and the airflow is discharged using the residual pressure of the farm's fan. If the measured airflow does not meet the standard, the control system starts the fan 6 and intelligently adjusts its speed to pressurize the airflow until the measured airflow stabilizes at the set value. The adjusted airflow is then discharged upwards through the fan 6.

[0021] In summary, by integrating intelligent detection and adaptive control logic, this invention optimizes the internal processing flow and structural design, solving the problems of high energy consumption, unstable processing effect, inconvenient maintenance, and easy damage to key components in the prior art.

[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An environmental protection device for odor control in livestock and poultry farms, comprising a water tank (1), an outer shell (2) mounted on the water tank (1), and a fan (6) mounted on the top of the outer shell (2), an air inlet on one side of the outer shell (2), and a water spray mechanism (4) inside the outer shell (2), wherein odor passes through the water spray mechanism (4) and continues to move upward; characterized in that, An activated carbon adsorption mechanism (5) is installed inside the outer shell (2). The activated carbon adsorption mechanism (5) is located above the water spray mechanism (4). An odor detection device is installed on the activated carbon adsorption mechanism (5) to detect the deodorization effect of the airflow after passing through the water spray mechanism (4). If the deodorization effect is not up to standard, the structure is adjusted so that the airflow passes through the activated carbon adsorption area. If the deodorization effect is up to standard, the airflow passes directly through and is discharged upward through the fan (6). An air volume sensor (7) is installed at the air outlet of the fan (6) to detect the air volume. If the air volume is less than the set value, the fan (6) is turned on. The fan speed (6) is adjusted according to the detected air volume and the air volume required by the design to ensure that the air volume is not lower than the air volume required by the design.

2. The odor control device for livestock and poultry farms according to claim 1, characterized in that, Multiple columns (3) are vertically installed inside the water tank (1). The water spraying mechanism (4) includes a water spray plate (9) installed on the column (3), a water pump (10) installed inside the water tank (1), and a return water pipe (11) connected to the water outlet of the water pump (10). A crisscrossing pipeline system is installed inside the water spray plate (9). The pipeline system is connected to the return water pipe (11). Multiple water outlet holes are installed in the pipeline system. Water drips into the water tank (1) after passing through the water spray plate (9). An inlet pipe is installed on the water tank (1).

3. The odor control device for livestock and poultry farms according to claim 1, characterized in that, Multiple vertical columns (3) are installed inside the water tank (1). The activated carbon adsorption mechanism (5) includes a functional plate (15) installed on the column (3), two boxes (17) installed through the functional plate (15), multiple water-separating plates (21) installed alternately and inclined downward on the inner wall of the box (17), a sliding plate (22) installed above the functional plate (15), and a relief groove (27) installed on the sliding plate (22) and activated carbon (28) located on both sides of the relief groove (27). The sliding plate (22) moves so that the two activated carbons (28) cover the top outlet of the two boxes (17), so that the airflow can pass through the activated carbon (28) to continue to move upward.

4. The odor control device for livestock and poultry farms according to claim 3, characterized in that, A threaded section is provided at the top of the column (3), and a limiting nut (14) is provided on the threaded section. When the limiting nut (14) is rotated to the bottom of the threaded section, the functional plate (15) falls on the limiting nut (14).

5. The odor control device for livestock and poultry farms according to claim 3, characterized in that, A mounting slot (26) is provided on the function plate (15), a rodless cylinder (24) is provided in the mounting slot (26), a limit rod (25) is provided on the sliding part of the rodless cylinder (24), a limit frame (23) is provided on the slide plate (22), and a limit hole is provided on the limit frame (23) for the limit rod (25) to pass through.

6. The odor control device for livestock and poultry farms according to claim 5, characterized in that, The functional board (15) has a cavity inside, and the control box (30), odor detection device a (31) and odor detection device b (32) are installed inside the cavity. The detection end of odor detection device a (31) is located below the functional board (15), and the detection end of odor detection device b (32) is located inside the box (17). The control system is installed inside the control box (30).

7. A method for environmentally friendly control of odor from livestock and poultry farms, employing the odor control device for livestock and poultry farms as described in claim 6, characterized in that... Includes the following steps: S1. Installation: Connect the air inlet of the device housing (2) to the air outlet of the farm exhaust fan in a sealed manner. Power on the device, initialize the control system, turn off the fan (6) by default, put the slide plate (22) in the bypass position, and the activated carbon adsorption mechanism (5) is not activated. Add an appropriate amount of water or treatment solution to the water tank (1). S2, Start-up: The farm fan is started, and the odorous air is sucked into the device and enters from the air inlet of the outer shell (2). The airflow first enters the space above the water tank (1) and is then forced to flow upward and pass through the water spray mechanism (4). When the airflow passes through the water curtain, the first stage of deodorization is completed. S3, gas-water separation and detection: The airflow first enters the box (17) and collides with the staggered inclined water baffle (21) to achieve gas-water separation, so that the subsequent airflow is relatively dry. At the same time, the odor detection device a (31) and the odor detection device b (32) monitor the gas composition after water spraying and gas-water separation in real time. S4. Intelligent decision-making and secondary processing: The control system receives data from odor detection device a (31) and odor detection device b (32) and compares it with the preset threshold. If the data meets the standard, the slide plate (22) continues to be kept in the bypass position, and the airflow bypasses the activated carbon (28) and enters the upper cavity. If the data does not meet the standard, the slide plate (22) moves, so that the two hydrophobic high-efficiency activated carbons accurately cover the top openings of the two boxes (17), and the airflow is forced to pass through the activated carbon layer. S5. Airflow assurance and final discharge: All airflows converge in the upper cavity of the device. The airflow sensor (7) continuously monitors the flow rate of the final discharged airflow. The control system controls the operation status of the fan (6) based on the detected airflow flow rate.

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