A hot-air drying device for chicken manure and a chicken manure treatment system thereof

Abstract

This invention relates to the field of livestock manure treatment technology, and discloses a hot air drying device for chicken manure, comprising a drying chamber and a heating chamber. The drying chamber is equipped with a multi-layer conveying mechanism. The heating chamber is connected to one side of the drying chamber, and a return air chamber is connected to the opposite side of the drying chamber. Hot air from the heating chamber is discharged after passing through the drying chamber, the return air chamber, and the drying chamber. This device offers high heat utilization, good drying uniformity, and low production costs.

Description

Technical Field

[0001] This invention relates to the field of livestock manure treatment technology, specifically to a hot air drying device for chicken manure and its chicken manure treatment system. Background Technology

[0002] In the field of agricultural waste treatment, hot air drying equipment for chicken manure rapidly removes moisture through high-temperature airflow. Combined with intelligent control and environmentally friendly design, it solves the pain points of low efficiency and high pollution associated with traditional chicken manure treatment, achieving resource utilization, harmlessness, and high-value utilization of waste. Its mature technology and ease of operation make it one of the core pieces of equipment for large-scale farms and organic fertilizer processing enterprises. It was developed based on the need for efficient dehydration, sterilization, and resource reuse of wet chicken manure, incorporating thermodynamics, heat and mass transfer principles, and mechanical engineering. Hot air drying equipment for chicken manure addresses the limitations of traditional sun-drying: natural sun-drying is inefficient, time-consuming, easily affected by weather, and cannot kill pathogens and insect eggs, making it difficult to meet the needs of large-scale farming.

[0003] The initial moisture content of fresh chicken manure is usually between 75% and 80%. For safe storage and transportation, it needs to be reduced to between 15% and 20% to prevent mold and reduce weight. For organic fertilizer production, energy utilization, or direct application to the field, a moisture content of 10% to 15% is generally required to facilitate granulation and preservation.

[0004] Chinese patent document CN221139758U discloses a manure board guiding mechanism, comprising two spaced-apart mounting plates. The guiding component is characterized by having a guiding assembly mounted on one side of each mounting plate facing each other. The guiding assembly includes a fixed part vertically arranged and fixed to the mounting plates, and a horizontally inclined moving part sliding on the mounting plate below the fixed part. The moving part and the mounting plates are elastically connected, and the moving part and the fixed part cooperate to adjust the movement trajectory of the manure board. This prior art allows for the simultaneous drying of upper and lower layers of chicken manure on a single drying line.

[0005] Chinese patent document CN206905488U discloses a hot air drying device for chicken manure, including a sealed air collection chamber connected to the rear of a chicken house. The rear of the chicken house has multiple first-row air windows connected to the air collection chamber. The air collection chamber is equipped with a drying box, one end of which extends out of the air collection chamber. The portion of the drying box inside the air collection chamber is open. Multiple conveyor belts are vertically spaced on the drying box. The multiple conveyor belts are staggered so that the lower conveyor belt can catch the manure falling from the upper conveyor belt. An exhaust fan is installed at the end of the drying box outside the air collection chamber. A chicken manure spreading device is provided at the conveying head of the first conveyor belt. A conveying device for outputting chicken manure is connected to the conveying head of the last conveyor belt.

[0006] Currently, in order to simultaneously dry large quantities of chicken manure and increase production, multiple sets of manure plate guiding mechanisms need to be installed in the hot air drying equipment for chicken manure. However, in the existing technology, the drying box of the hot air drying equipment for chicken manure is not very effective for drying multi-layer conveyor belts because the heat is easily dissipated directly with the air in the drying equipment. Furthermore, the chicken manure near the hot air outlet dries easily, while the chicken manure far from the drying outlet does not dry easily, resulting in poor drying uniformity. Therefore, repeated drying or increasing the drying temperature of the drying box is required, which increases costs. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a hot air drying device for chicken manure that can simultaneously dry multiple layers of chicken manure, including a drying box and a heating box. The drying box is provided with a multi-layer conveying mechanism. The heating box is connected to one side of the drying box, and a return air box is connected to the opposite side of the drying box. The hot air from the heating box is discharged after passing through the drying box, the return air box and the drying box.

[0008] Preferably, the hot air outlets of the heating box and the return air box correspond to different levels of the transport mechanism, and the hot air mainly flows in a U-shape and can penetrate the transport mechanism for cross-drying.

[0009] To ensure sufficient heat absorption, the upper part of the heating box has an air inlet and an air outlet, the lower part of the heating box has a hot air outlet, the lower part of the return air box has a warm air inlet, and the upper part of the return air box has a warm air outlet. The hot air outlet and the warm air inlet are arranged opposite each other on both sides of the drying box, and the warm air outlet and the air outlet are arranged opposite each other on both sides of the drying box. The hot air flows from bottom to top and circulates around the drying chicken manure.

[0010] In order to reuse heat and further reduce the moisture content of chicken manure, the air inlet of the heating box is equipped with multiple heat exchange tubes that are connected to the air outlet. The gaps between the heat exchange tubes allow cold air from the air inlet to enter the heating box. A heater is installed in the middle of the heating box.

[0011] To improve the drying effect of chicken manure by allowing the hot air and the movement of chicken manure to interact, the inlet of the drying box is located at the top, and the outlet is located at the bottom.

[0012] To improve the uniformity of drying chicken manure on the transport mechanism, multiple sets of heating boxes and return air boxes are set on both sides of the drying box. The multiple heating boxes are interconnected by hot air channels, and the multiple return air boxes are also interconnected by hot air channels. The hot air channels connect to the interior of the drying box, and hot air enters the drying box horizontally and simultaneously to heat the chicken manure on the transport mechanism.

[0013] Preferably, the drying oven is provided with a 4-layer transport mechanism, the hot air outlet and the warm air inlet are located between the first and second layers, the warm air outlet is located between the third and fourth layers, and the exhaust vent is located above the fourth layer.

[0014] Preferably, the drying oven is provided with a 4-layer transport mechanism, the hot air outlet is located between the first and second layers, the warm air inlet is located below the first layer and between the second and third layers, the warm air outlet is located between the third and fourth layers, and the exhaust vent is located above the fourth layer.

[0015] A chicken manure treatment system includes a hot air drying equipment for chicken manure, a feeding machine, a hopper, a sorting machine, a combustion furnace, and a weighing and baling machine. The feeding machine is located at the top inlet of the hot air drying equipment for chicken manure. A conveyor belt is installed at the bottom outlet of the hot air drying equipment for chicken manure. The conveyor belt transports the dried chicken manure to the hopper. The hopper is transported to the sorting machine via a second conveyor belt. The sorting port of the sorting machine is connected to the weighing and baling machine.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention changes the direction of hot air by altering the position of the heating box and adding a return air box. It utilizes the longitudinal penetration and upward flow of hot air through each transport mechanism to increase the heat exchange efficiency with chicken manure. Each stream of hot air repeatedly blows over the chicken manure on multiple transport mechanisms, heating the chicken manure in the lower transport mechanism first, then the chicken manure in the upper transport mechanism. Since the chicken manure moves downward on the transport mechanism, each batch of chicken manure first receives heat from the tail end of the hot air, then heat from the middle section, and finally heat from the front end, continuously receiving each stream of hot air from the heating box. This perfectly solves the problems of low heat utilization and poor drying uniformity.

[0018] 2. The heating box of the present invention has an air inlet and an air outlet arranged in a cross manner to recover waste heat. The last heat of the hot air can be used to heat the cold air at the air inlet through the heat exchange tube, thus preheating the cold air. Combined with the present invention to change the direction of the hot air, it can save 40% of fuel and reduce production costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention;

[0020] Figure 2 for Figure 1 Top view;

[0021] Figure 3 for Figure 2 AA section view;

[0022] Figure 4 This is a schematic diagram of the heating chamber;

[0023] Figure 5 This is a schematic diagram of the interior of the heating chamber;

[0024] Figure 6 for Figure 4 Side view;

[0025] Figure 7 for Figure 1 Bottom diagram;

[0026] Figure 8 This is a schematic diagram of Embodiment 2 of the present invention;

[0027] Figure 9 This is a schematic diagram of Embodiment 3 of the present invention;

[0028] Figure 10 for Figure 9 Side view. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] The reference numerals in the accompanying drawings of the instruction manual include: drying box 1, heating box 2, return air box 3, air inlet 4, air outlet 5, hot air outlet 6, warm air inlet 7, warm air outlet 8, heat exchange tube 9, heating tube 10, feed inlet 11, discharge outlet 12, hot air channel 13, first-layer conveyor mechanism 14, second-layer conveyor mechanism 15, third-layer conveyor mechanism 16, fourth-layer conveyor mechanism 17, hot air drying equipment for chicken manure 18, spreading machine 19, silo 20, sorting machine 21, combustion furnace 22, conveyor belt one 23, conveyor belt two 24, conveyor belt three 25, weighing and baling machine 26, fan 27, dehumidifying fan 28. Example 1

[0031] like Figure 1-7 As shown, a hot air drying device 18 for chicken manure includes a drying chamber 1 and three heating chambers 2. The drying chamber 1 is equipped with four layers of conveying mechanisms. The heating chambers 2 are respectively connected and spaced apart on one side of the long side of the drying chamber 1. Three return air boxes 3 are connected and arranged at opposite positions on the other side of the long side of the drying chamber 1. The hot air from the heating chambers 2 is discharged after passing through the drying chamber 1, the return air boxes 3 and the drying chamber 1. The heating chambers 2, the return air boxes 3 and the corresponding drying chambers 1 form a set, which can be lengthened or reduced according to the length of the conveying mechanism.

[0032] The hot air outlets 6 of the heating box 2 and the return air box 3 correspond to different levels of the transport mechanism. The hot air mainly flows in a U-shape and can penetrate the transport mechanism for cross-drying.

[0033] The upper part of the heating box 2 is an air inlet 4 and an air outlet 5, and the lower part of the heating box 2 is a hot air outlet 6. A fan 27 is installed at the hot air outlet 6. The fan 27 draws hot air into the drying box 1. The lower part of the return air box 3 is a warm air inlet 7, and the upper part of the return air box 3 is a warm air outlet 8. The hot air outlet 6 and the warm air inlet 7 are arranged opposite each other on both sides of the drying box 1. The warm air outlet 8 and the air outlet 5 are arranged opposite each other on both sides of the drying box 1. Hot air dries chicken manure from bottom to top.

[0034] The heating box 2 has multiple heat exchange tubes 9 at the air inlet 4 that are connected to the air outlet 5. The heat exchange tubes 9 are connected to the dehumidifying fan 28. The gap between the outer walls of the heat exchange tubes 9 allows the cold air from the air inlet 4 to enter the heating box 2. Multiple sets of heating tubes 10 are arranged in the middle of the heating box 2, and the cold air exchanges heat through the gaps between the heating tubes 10.

[0035] The inlet 11 of the drying box 1 is located at the top, and the outlet 12 is located at the bottom.

[0036] The three heating boxes 2 are interconnected by a hot air channel 13, and the multiple return air boxes 3 are also interconnected by a hot air channel 13. The hot air channel 13 is connected to the interior of the drying box 1 through a mesh structure. The fan 27 draws hot air into the hot air channel 13 and then into the interior of the drying box 1 through the mesh structure. The hot air enters the drying box 1 horizontally and simultaneously to heat the chicken manure on the transport mechanism.

[0037] The drying oven 1 is equipped with four layers of transport mechanisms. The hot air outlet 6 and the warm air inlet 7 are located between the first and second transport mechanisms 15, the warm air outlet 8 is located in the third transport mechanism 16, and the exhaust vent 5 is located in the fourth transport mechanism 17.

[0038] The transport mechanism adopts a two-layer flip-plate structure, specifically the structure of a manure board guiding mechanism for manure disclosed in existing patent document CN221139758U, which will not be described in detail here. Example 2

[0039] like Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that the drying box 1 is equipped with 4 layers of conveying mechanisms. The hot air outlet 6 is located between the first and second layer conveying mechanisms 15. The warm air inlet 7 is located below the first layer conveying mechanism 14 and between the second and third layer conveying mechanisms 16. The warm air outlet 8 is located between the third and fourth layer conveying mechanisms 17. The exhaust vent 5 is located in the fourth layer conveying mechanism 17. The hot air circulates from bottom to top and crosses around each layer to dry the chicken manure. Example 3

[0040] like Figure 9-10As shown, a chicken manure treatment system includes a hot air drying chicken manure device 18 (as described in Example 1), a feeding machine 19, a hopper 20, a sorting machine 21, and a combustion furnace 22. The feeding machine 19 is located at the top inlet 11 of the hot air drying chicken manure device 18. A conveyor belt 23 is installed at the bottom outlet 12 of the hot air drying chicken manure device 18. The conveyor belt 23 transports the dried chicken manure to the hopper 20. The hopper 20 then transports the dried chicken manure to the sorting machine 21 via a second conveyor belt 24. The sorting port of the sorting machine 21 is connected to the weighing and baling machine 26. The sorting machine 21 can separate chicken feathers, chicken manure powder, and chicken manure granules. The powdered chicken manure is heated in fresh chicken manure to reduce viscosity and moisture and prevent it from sticking to the transport mechanism. The sorting machine 21 is equipped with a combustion furnace 22 and a dust collector. The dust collector of the combustion furnace 22 is connected to the combustion furnace 22 for dust removal. The combustion furnace 22 provides hot water to the heating tube 10 through a pipeline (the pipeline is not shown in the figure). The combustion furnace 22 continuously provides fuel through the conveyor belt 25.

[0041] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for hot air drying chicken manure, comprising a drying chamber and a heating chamber, wherein the drying chamber is equipped with a multi-layer conveying mechanism, characterized in that, The heating box is connected to one side of the drying box, and the return air box is connected to the opposite position on the other side of the drying box. The hot air from the heating box is discharged after passing through the drying box, the return air box and the drying box. The upper part of the heating box is an air inlet and an air outlet, the lower part of the heating box is a hot air outlet, the lower part of the return air box is a warm air inlet, the upper part of the return air box is a warm air outlet, the hot air outlet and the warm air inlet are arranged opposite each other on both sides of the drying box, and the warm air outlet and the air outlet are arranged opposite each other on both sides of the drying box. The hot air outlet of the heating box and the warm air outlet of the return air box correspond to different levels of the transportation mechanism. The heating chamber and return air chamber are configured in multiple groups. The multiple heating chambers are interconnected through hot air channels, and the multiple return air chambers are also interconnected through hot air channels. The hot air channels connect to the interior of the drying chamber.

2. The hot air drying equipment for chicken manure according to claim 1, characterized in that: The heating box has multiple heat exchange tubes at the air inlet that are connected to the air outlet. The gaps between the heat exchange tubes allow cold air from the air inlet to enter the heating box. A heater is installed in the middle of the heating box.

3. The hot air drying equipment for chicken manure according to claim 2, characterized in that: The feed inlet of the drying chamber is located at the top, and the discharge outlet is located at the bottom.

4. The hot air drying equipment for chicken manure according to claim 3, characterized in that: The drying oven is equipped with a four-layer transport mechanism. The hot air outlet and warm air inlet are located between the first and second layers, the warm air outlet is located on the third layer, and the exhaust vent is located on the fourth layer.

5. The hot air drying equipment for chicken manure according to claim 4, characterized in that: The drying oven is equipped with a four-layer transport mechanism. The hot air outlet is located between the first and second layers, the warm air inlet is located below the first layer and between the second and third layers, the warm air outlet is located on the third layer, and the exhaust vent is located on the fourth layer.

6. A chicken manure treatment system, characterized in that: The device includes the hot air drying equipment for chicken manure as described in any one of claims 1-5, a feeding machine, a hopper, a sorting machine, a combustion furnace, and a weighing and baling machine. The feeding machine is located at the feed inlet at the top of the hot air drying equipment for chicken manure. A conveyor belt is provided at the discharge outlet at the bottom of the hot air drying equipment for chicken manure. The conveyor belt transports the dried chicken manure to the hopper. The hopper is transported to the sorting machine via a second conveyor belt. The sorting port of the sorting machine is connected to the weighing and baling machine.

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