Aerobic fermentation aeration device

Abstract

The present application belongs to the field of waste treatment, and particularly relates to an aerobic fermentation aeration device, which comprises a tank body and a stirring shaft, the tank body is provided with an upper bearing body and a lower bearing body, the stirring shaft is rotatably installed in the tank body through the upper bearing body and the lower bearing body, a driving device is installed on the upper part of the tank body, an aeration fan is installed outside the tank body, a butterfly valve is installed at the outlet of the aeration fan, a rotary joint is installed at the bottom of the lower bearing body, an aeration pipeline is arranged between the rotary joint and the butterfly valve, the stirring shaft is of a hollow structure and is provided with a gas outlet, aeration blades are installed on the stirring shaft, the aeration blades are provided with fixed cavities, movable cavities are movably installed in the fixed cavities, and the movable cavities are provided with aeration holes. The present application has the advantages of simple structure, convenient installation and maintenance, the aeration blades can be used for stirring and aeration at the same time, the aeration effect of aerobic fermentation is improved, and the aeration holes are retracted into the aeration blades during the non-aeration period, so that the aeration holes are effectively prevented from being blocked by contacting the materials.

Description

Technical Field

[0001] This invention belongs to the field of waste treatment, and specifically relates to an aerobic fermentation aeration device. Background Technology

[0002] Aerobic fermentation technology for livestock and poultry manure is a biological treatment process that uses aerobic microorganisms to decompose organic matter into humus. The core of this process lies in controlling parameters such as temperature, oxygen supply, and moisture content to achieve rapid composting and kill pathogens. Oxygen supply is a key process in anaerobic composting technology. A common method is to introduce an appropriate amount of air into the material; the oxygen in the air promotes the respiration of aerobic microorganisms, which decompose organic matter.

[0003] Utility model patent application CN202120318080.0 discloses a composting device with agitator rods and pressurized aeration, comprising a hollow agitator shaft 5 and multiple agitator rods 4 mounted on the shaft 5. Agitator rods 4 are evenly distributed with agitator holes 15. The agitator holes are prevented from clogging by the staggered holes in the outer shell of the agitator rods 4 and the introduction of pressurized air. However, when the material has a high moisture content, the sticky, wet material can still easily clog the agitator holes, preventing gas from entering the reactor and thus affecting the aeration effect. Summary of the Invention

[0004] To address the shortcomings of existing aerobic fermentation aeration technology, this invention provides an aerobic fermentation aeration device.

[0005] This invention discloses an aerobic fermentation aeration device, comprising a tank and a stirring shaft. The tank has an upper bearing body and a lower bearing body. The stirring shaft is rotatably mounted inside the tank via the upper and lower bearing bodies. A drive device is installed on the upper part of the tank. An aeration fan is installed outside the tank. A butterfly valve is installed at the outlet of the aeration fan. A rotary joint is installed at the bottom of the lower bearing body. An aeration pipe is provided between the rotary joint and the butterfly valve. The stirring shaft has a hollow structure and is provided with an air outlet. Aeration blades are installed on the stirring shaft. The aeration blades have a fixed cavity. A movable cavity is movably installed inside the fixed cavity. The movable cavity is provided with an aeration hole.

[0006] The aeration blades are equipped with a connecting plate, on which a blade bottom plate, a blade blocking plate, a blade top plate, and a blade side sealing plate are welded. The blade connecting plate and the blade fixing seat are connected by bolts.

[0007] The connecting plate is equipped with an air inlet hole, and the cavity of the stirring shaft and the aeration blades are connected through the air outlet hole and the air inlet hole;

[0008] The blade blocking plate is provided with a fixed cavity, and damping springs are provided on both sides of the fixed cavity. A movable cavity is movably installed inside the fixed cavity.

[0009] The movable chamber is provided with an aeration hole near the lower part of the closed end, and the movable chamber is fixedly connected to the damping spring by bolts;

[0010] A sealing ring is provided between the moving cavity and the fixed cavity, which plays a sealing role when the moving cavity and the fixed cavity slide relative to each other;

[0011] A stop block is fixedly installed on the blade base plate. In the non-aeration state, the moving cavity presses against the stop block under the elastic force of the damping spring.

[0012] Furthermore, a blade holder is welded onto the stirring shaft, and the aeration blades are connected to the blade holder by bolts.

[0013] The present invention can bring the following beneficial effects:

[0014] 1. The present invention has a simple structure and is easy to install and maintain;

[0015] 2. The aeration blades in this invention can achieve the function of simultaneous stirring and aeration, thereby improving the aeration effect of aerobic fermentation;

[0016] 3. During non-aeration periods, the aeration holes retract into the aeration blades, effectively preventing the aeration holes from coming into contact with the material and causing blockage. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the overall structure of the present invention;

[0018] Figure 2 This is a side sectional view of the overall structure of the present invention;

[0019] Figure 3 This is a partial enlarged view of the aeration blades of the present invention;

[0020] Figure 4 This is an isometric sectional view of the aeration blade of the present invention;

[0021] Figure 5 This is a partial cross-sectional view of the stirring shaft and aeration blades of the present invention;

[0022] Figure 6 This is a side sectional view of the aeration blade of the present invention;

[0023] Figure 7 This is a side view illustrating the working principle of the aeration blades of the present invention.

[0024] Figure 8 This is an isometric sectional view of the aeration blade of the present invention in the aeration state.

[0025] Figure 9 This is a side sectional view of the aeration blade of the present invention in the state after aeration is completed;

[0026] Figure 10 This is an isometric sectional view of the aeration blades of the present invention in the state after aeration is completed.

[0027] In the diagram: 1-Tank body, 2-Lower bearing body, 3-Agitator shaft, 301-Air outlet, 4-Aeration blade, 401-Connecting plate, 402-Blade bottom plate, 403-Blade blocking plate, 404-Fixed cavity, 405-Moving cavity, 406-Damping spring, 407-Stop block, 408-Air inlet, 409-Aeration hole, 410-Sealing ring, 411-Blade top plate, 412-Blade side sealing plate, 5-Upper bearing body, 6-Drive device, 7-Rotary joint, 8-Aeration pipeline, 9-Aeration blower, 10-Butterfly valve, 11-Blade fixing seat. Detailed Implementation

[0028] The technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0029] like Figure 1 , Figure 2 As shown, the present invention includes a tank 1 set on the ground. The tank 1 may be cylindrical. A stirring shaft 3 is provided inside the tank 1. The stirring shaft 3 is connected to the tank 1 through a lower bearing body 2 and an upper bearing body 5. A rotary joint 7 is fixedly installed at the bottom of the lower bearing body 2. A driving device 6 is provided on the upper part of the tank 1. The driving device 6 can drive the stirring shaft 3 to rotate around its own axis. An aeration fan 9 is provided outside the tank 1. The aeration fan 9 is fixed on the ground. A butterfly valve 10 is provided at the outlet of the aeration fan 9. The butterfly valve 10 is connected to the rotary joint 7 through an aeration pipe 8. The rotary joint 7 can ensure that the stirring shaft 3 achieves gas sealing while rotating.

[0030] like Figure 3 As shown, a blade fixing seat 11 is fixedly welded onto the stirring shaft 3, and an aeration blade 4 is installed on the blade fixing seat 11 by bolts.

[0031] like Figure 5 As shown, the stirring shaft 3 has a hollow structure and is provided with an air outlet 301.

[0032] like Figure 4 , Figure 5 and Figure 6As shown, the aeration blade 4 includes a connecting plate 401, a blade bottom plate 402, a blade blocking plate 403, a blade top plate 411, and a blade side sealing plate 412, which are welded to the connecting plate 401 to form the sealed space of the aeration blade 4. The connecting plate 401 is bolted to the blade fixing seat 11. The connecting plate 401 is provided with an air inlet 408. The cavity of the stirring shaft 3 and the sealed space of the aeration blade 4 are connected through the air outlet 301 and the air inlet 408. The blade blocking plate 403 is provided with a fixing cavity 404, and damping springs 406 are provided on both sides of the fixing cavity 404. A movable cavity 405 is movably installed inside the fixing cavity 404. The movable cavity 405 is close to the aeration blade 4. One end of the moving cavity 405 is open, and a limiting plate is provided on the outer edge of the open end. When the moving cavity 405 extends the aeration blade 4 to its limit position, the limiting plate abuts against the fixed cavity 404 to limit the moving cavity 405. The end of the moving cavity 405 near the outside of the aeration blade 4 is closed, and an aeration hole 409 is provided below the closed end of the moving cavity 405. The moving cavity 405 is fixedly connected to the damping spring 406 by bolts. A sealing ring 410 is provided between the moving cavity 405 and the fixed cavity 404. When the moving cavity 405 and the fixed cavity 404 slide relative to each other, the sealing ring 410 can seal the gas inside the aeration blade 4. A stop block 407 is fixedly provided on the blade bottom plate 402. Figure 9 and Figure 10 In the non-aeration state, under the elastic force of the damping spring 406, the moving cavity 405 presses against the stop block 407.

[0033] When the equipment is running, first start the drive unit 6, the stirring shaft 3 begins to rotate, and the aeration blades 4 rotate synchronously with the stirring shaft 3 to perform stirring; for example Figure 7 The aeration blade 4 rotates along direction A, and the blade top plate 411 is at a certain angle to the direction of rotation, which reduces the resistance caused by the material to the aeration blade 4. The rotation of the aeration blade 4 along direction A creates a certain material-free space behind the blade blockage plate 403.

[0034] Restart aeration blower 9, such as Figure 1 Pressurized gas enters the aeration pipe 8 through the butterfly valve 10, and then enters the hollow stirring shaft 3 through the rotary joint 7; for example... Figure 5 Then, it enters the aeration blades 4 through the air outlet 301 and air inlet 408 of the stirring shaft; such as Figure 7 and Figure 8Pressurized gas enters the moving chamber 405. The gas pressure inside the aeration blade 4 is greater than the spring force. The moving chamber 405 presses the damping spring 406 along direction B, and under the action of air pressure, the blade blocking plate 403 extends out along the fixed chamber 404. The closed end of the moving chamber 405 extends into the material-free space behind the blade blocking plate 403, and the aeration hole 409 extends out of the fixed chamber 404. The pressurized gas enters the material in the tank 1 through the aeration hole 409. Thus, the aeration blade 4 can rotate and aerate simultaneously, and the aeration hole 409 will not be blocked by the material.

[0035] like Figure 9 and Figure 10 As shown, when aeration ends, the aeration blower 9 stops working, and the gas pressure inside the aeration blades 4 decreases. At this time, the elastic force of the damping spring 406 is greater than the gas pressure inside the aeration blades 4, pushing the moving chamber 405 back into the fixed chamber 404 along direction C. The aeration hole 409 retracts into the aeration blades 4, and the moving chamber 405 stops sliding after contacting the stop block 407, thus ending the aeration process. Since the aeration hole 409 retracts into the aeration blades 4 and no longer contacts the material inside the tank 1, it will not be blocked by material in the non-aeration state.

[0036] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. An aerobic fermentation aeration device, comprising a tank (1) and a stirring shaft (3), the tank (1) having an upper bearing body (5) and a lower bearing body (2), the stirring shaft (3) being rotatably mounted inside the tank (1) via the upper bearing body (5) and the lower bearing body (2), a drive device (6) being mounted on the upper part of the tank (1), an aeration blower (9) being mounted on the outside of the tank (1), a butterfly valve (10) being mounted at the outlet of the aeration blower (9), a rotary joint (7) being mounted at the bottom of the lower bearing body (2), and an aeration pipe (8) being provided between the rotary joint (7) and the butterfly valve (10), characterized in that, The stirring shaft (3) is hollow and has an air outlet (301). An aeration blade (4) is installed on the stirring shaft (3). The aeration blade (4) has a fixed cavity (404). A movable cavity (405) is movably installed in the fixed cavity (404). The movable cavity (405) is provided with an aeration hole (409). The aeration blade (4) is provided with a connecting plate (401), on which a blade bottom plate (402), a blade blocking plate (403), a blade top plate (411), and a blade side sealing plate (412) are welded. The blade connecting plate (401) is connected to the blade fixing seat (11) by bolts. The connecting plate (401) is provided with an air inlet (408), and the cavity of the stirring shaft (3) and the aeration blades (4) are connected through the air outlet (301) and the air inlet (408); The blade blocking plate (403) is provided with a fixed cavity (404), and damping springs (406) are provided on both sides of the fixed cavity. A movable cavity (405) is movably installed inside the fixed cavity (404). An aeration hole (409) is provided below the closed end of the movable cavity (405), and the movable cavity (405) is fixedly connected to the damping spring (406) by bolts; A sealing ring (410) is provided between the movable cavity (405) and the fixed cavity (404) to provide a sealing function when the movable cavity (405) and the fixed cavity (404) slide relative to each other; A stop block (407) is fixedly installed on the blade base plate (402). In the non-aeration state, under the elastic force of the damping spring (406), the moving cavity (405) presses against the stop block (407).

2. The aerobic fermentation aeration device according to claim 1, characterized in that, A blade fixing seat (11) is welded on the stirring shaft (3), and the aeration blade (4) is connected to the blade fixing seat (11) by bolts.

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