Aeration device for aerobic fermentation of organic wastes

Abstract

The invention discloses an organic waste aerobic fermentation aeration device which comprises a hollow transverse frame and a telescopic aeration pipe, the hollow transverse frame is horizontally fixed above a fermentation tank and is of a hollow tubular structure, a main air cavity is formed in the hollow transverse frame, one end of the hollow transverse frame is connected with an aeration fan through a flange, and the other end of the hollow transverse frame is closed; a plurality of gas path interfaces are formed in the bottom of the hollow transverse frame at equal intervals, and each gas path interface is connected with a telescopic aeration pipe through a quick release connector; the telescopic aeration pipe comprises a plurality of mutually nested pipe sections and is composed of a main pipe section and a nested movable pipe section, the upper end of the main pipe section is fixed below the hollow cross frame and is connected with the corresponding gas path interface, and the movable pipe section can axially stretch along the main pipe section; aeration holes are distributed in each pipe section along the pipe body. The aeration device can penetrate through the aerobic fermentation tank from the top to the bottom, uniform aeration is achieved, the aeration pipe is telescopic, and feeding and discharging of materials are not affected.

Description

Technical Field

[0001] The present application relates to the field of aerobic fermentation, and in particular to an aeration device for aerobic fermentation of organic waste. Background Art

[0002] Aerobic fermentation of organic waste is an environmentally friendly and sustainable treatment method. It cleverly utilizes the process of aerobic microorganisms decomposing organic waste in sufficient oxygen, transforming waste that would otherwise be a burden on the environment into humus fertilizer beneficial to plant growth. This process not only reduces the accumulation of organic waste but also generates heat through microbial respiration, promoting the rapid decomposition of organic matter and forming a stable, harmless fertilizer.

[0003] There are many types of aeration devices used for aerobic fermentation, such as the aeration device for aerobic fermentation of organic solid waste disclosed in Patent No. CN202220232839.8. The aeration devices used for aerobic fermentation in the prior art can basically meet the use requirements, but there are still the following deficiencies during use: At present, the aeration devices for aerobic fermentation of organic waste, in order to facilitate the loading and unloading of materials, mostly adopt the method of fixing the aeration device to the bottom or lower part of the fermentation tank. When the material layer is high, it is difficult for the aeration device to aerate the upper material layer, resulting in insufficient aeration of the upper material. If the aeration pipes are distributed throughout the fermentation tank space, it will make it difficult for the material to enter and exit. Summary of the Invention

[0004] In response to the above-mentioned technical problems existing in the prior art, the purpose of this application is to provide an aerobic fermentation aeration device for organic waste, in which air is passed into a retractable aeration device to aerate the fermentation pile. The aeration device is retractable and does not affect the input and output of materials. It can be used in the aerobic fermentation of organic waste such as food waste, livestock and poultry manure, and sludge to achieve sufficient longitudinal aeration of high material layers.

[0005] The technical solutions adopted in this application are as follows:

[0006] An aerobic fermentation aeration device for organic waste comprises a hollow cross frame and a telescopic aeration pipe. The hollow cross frame is fixed horizontally above a fermentation tank and adopts a hollow tubular structure with a main air cavity formed inside. One end is connected to an aeration fan via a flange and the other end is closed. A plurality of air path interfaces are arranged at equal intervals on the bottom of the hollow cross frame, and each air path interface is connected to a telescopic aeration pipe via a quick-release joint. The telescopic aeration pipe comprises a plurality of nested pipe sections, consisting of a main pipe section and nested movable pipe sections. The upper end of the main pipe section is fixed below the hollow cross frame and connected to the corresponding air path interface. The movable pipe section can be extended and retracted axially along the main pipe section. Aeration holes are distributed along the pipe body of each movable pipe section.

[0007] Furthermore, in the nested connection structure of two adjacent pipe sections, a clamping ring is provided on the inner side of the bottom pipe opening of the upper pipe section, and a convex ring is provided on the outer side of the top of the adjacent lower pipe section. The clamping ring can limit the convex ring and prevent the movable pipe section from falling out during the extension and retraction process; and a sealing rubber is provided on the inner side of the clamping ring to prevent the gas from escaping from the gap between the two adjacent pipe sections during the extension and retraction process of the movable pipe section.

[0008] Furthermore, the diameter of the aeration holes is 2-5 mm.

[0009] Furthermore, the hole spacing of the aeration holes on the movable pipe section gradually decreases in a direction from top to bottom.

[0010] Furthermore, the bottom end of the innermost movable pipe section is configured as a conical head to reduce resistance when inserted into a pile of materials.

[0011] Furthermore, it also includes a steel wire rope, and a spring is provided between each adjacent pipe segment. One end of the steel wire rope passes through the top outside of the main pipe segment into its internal center, and after passing through the internal center of all movable pipe segments, it is fixedly connected to the bottom end of the innermost movable pipe segment, and the other end of the steel wire rope is connected to the driving mechanism; when the driving mechanism tightens the steel wire rope, the spring force is overcome and the movable pipe segment is retracted and compressed. When the driving mechanism acts in the reverse direction to relax the steel wire rope, the movable pipe segment is pulled out and extended under the action of the spring force.

[0012] Furthermore, a horizontal porous plate is provided on the inner side of the top pipe opening of each pipe section, and the spring is connected to the center of the porous plate to fix the spring; the steel wire rope passes through the center of the spring, one end of the steel wire rope is fixedly connected to the bottom end of the innermost movable pipe section, and the other end of the steel wire rope passes through the porous plate of the main pipe section.

[0013] Furthermore, the driving mechanism includes an electric motor and a rotating shaft, the steel wire rope is wound on the rotating shaft, and the electric motor can drive the rotating shaft to rotate forward or reverse, thereby tightening or loosening the steel wire rope.

[0014] Furthermore, the lengths of the various pipe sections are equal.

[0015] Furthermore, the hollow cross frame is anchored to the top beam of the factory building through an I-beam fixing frame, the surface of the hollow cross frame is covered with a corrosion-resistant coating, a dustproof sealing ring is provided at the air path interface below the hollow cross frame, and the telescopic aeration pipe is made of wear-resistant material.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the aeration device of the present invention can penetrate from the top to the bottom of the aerobic fermentation tank to achieve uniform aeration, and the aeration pipe is retractable without affecting the inflow and outflow of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic structural diagram of the overall installation of the aeration device of the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the aeration device of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0020] An aerobic fermentation aeration device for organic waste, Figure 1-Figure 2 , including a hollow horizontal frame 2 and a telescopic aeration pipe. The hollow horizontal frame 2 is horizontally fixed above the fermentation tank. It adopts a hollow tubular structure with a main air cavity formed inside. One end is connected to the aeration fan through a flange and the other end is closed; a plurality of air path interfaces 3 are arranged at equal intervals at the bottom of the hollow horizontal frame 2, and each air path interface 3 is connected to a telescopic aeration pipe 4 through a quick-release joint.

[0021] The telescopic aeration pipe 4 comprises several nested pipe sections of equal length, specifically a main pipe section and nested movable pipe sections. The upper end of the main pipe section is fixed below the hollow cross frame 2 and connected to the corresponding air path interface 3. The movable pipe section can be extended and retracted axially along the main pipe section. Each movable pipe section has aeration holes 5 distributed along the pipe body. In the nested connection structure of two adjacent pipe sections, a retaining ring is provided on the inner side of the bottom pipe opening of the upper pipe section, and a raised ring is provided on the outer side of the top of the next pipe section. The retaining ring can be restrained against the raised ring to prevent the movable pipe section from dislodging during extension and retraction. A sealing rubber is also provided on the inner side of the retaining ring to prevent gas from escaping through the gap between the two adjacent pipe sections during extension and retraction.

[0022] The telescopic aeration tube 4 comprises several movable sections, each with aeration holes 2-5 mm in diameter on its sidewalls. The innermost movable section has a tapered tip 6 at its bottom to reduce resistance during insertion into the pile. The spacing between the aeration holes 5 on the movable sections decreases as you move from top to bottom.

[0023] The aeration device of the present application also includes a wire rope 9, an electric motor 8 and a rotating shaft 7. A spring 10 is provided between each adjacent pipe section. One end of the wire rope 9 passes through the top of the main pipe section into its internal center, and after passing through the internal center of all movable pipe sections, it is fixedly connected to the bottom end of the innermost movable pipe section. The other end of the wire rope 9 is connected to the driving mechanism; when the driving mechanism tightens the wire rope, the elastic force of the spring 10 is overcome, and the movable pipe section is retracted and compressed. When the driving mechanism acts in the reverse direction to relax the wire rope, the movable pipe section is pulled out and extended under the action of the elastic force of the spring 10.

[0024] The inner side of the top pipe opening of each pipe section is provided with a horizontal perforated plate, and a spring is connected to the center of the perforated plate to fix the spring; the steel wire rope 9 passes through the center of the spring, one end of the steel wire rope 9 is fixedly connected to the bottom end of the innermost movable pipe section, and the other end of the steel wire rope 9 passes out of the perforated plate of the main pipe section.

[0025] One end of the steel wire rope 9 passes into the interior of the main pipe section from the top thereof, passes through the center of the spring, and is fixedly connected to the bottom end of the innermost movable pipe section, and the other end of the steel wire rope 9 is wound on the rotating shaft 7; the electric motor 8 can drive the rotating shaft 7 to rotate forward or reversely, so as to tighten or loosen the steel wire rope 9. The extension and retraction of the pipe need to rely on the electric motor 8 to drive the rotating shaft 7 to rotate; when the rotating shaft 7 rotates to tighten the steel wire rope, the movable pipe section is retracted and compressed by overcoming the elastic force of the spring 10; when the rotating shaft 7 reversely rotates to loosen the steel wire rope, the movable pipe section is pulled out and elongated under the elastic force of the spring 10.

[0026] The hollow cross frame 2 is anchored to the roof beam of the factory building through the I-shaped steel fixing frame 1.

[0027] Further in the present application, the upper end of the steel wire rope 9 can directly pass out of the air path interface 3 and the hollow cross frame 2 in sequence and be wound on the rotating shaft 7.

[0028] The technical points of the present application include:

[0029] 1. The surface of the hollow cross frame is coated with a corrosion-resistant coating (such as polytetrafluoroethylene), and a dustproof sealing ring is arranged at the air path interface;

[0030] 2. The material of the telescopic aeration pipe is wear-resistant material, and in particular, the conical head at the bottom end of the innermost movable pipe section is high-strength wear-resistant material;

[0031] 3. The extension and retraction process of the telescopic aeration pipe 4 and the start-stop sequence of the aeration blower are that before the telescopic aeration pipe 4 is elongated, the aeration blower is started, and after the telescopic aeration pipe 4 is elongated or retracted, the aeration blower is stopped, so as to prevent the telescopic aeration pipe 4 from being blocked.

[0032] Embodiment: As shown in Figure 1 and Figure 2 The hollow cross frame 2 adopts a DN200 stainless steel pipe, is horizontally arranged at a position 600 mm above the fermentation tank, and is anchored to the roof beam of the factory building through the I-shaped steel fixing frame 1. A 7.5 kW centrifugal aeration blower is connected to the internal main air cavity of the hollow cross frame 2, and the air volume can be adjusted in a range of 500-2000 m 3 / h. Six DN100 air ports 3 are welded to the bottom of the hollow cross frame 2. Each port is connected to a telescopic aeration pipe 4 via a clamp. The telescopic aeration pipe 4 consists of five nested pipe sections. The outermost main pipe section is a DN100 stainless steel pipe. The remaining four movable pipe sections are DN92, DN84, DN76, and DN68, respectively, from the outside inward. The bottom of the innermost pipe section is configured with a tapered head 6. Each section is 500mm long.

[0033] There is a two-layer nested structure between the two adjacent pipe sections of the telescopic aeration pipe 4, and the gap between the two layers is about 3mm. The extension and retraction of the movable pipe section requires the electric motor 8 to drive the rotating shaft 7 to rotate. A steel wire rope 9 is wrapped around the rotating shaft 7. After passing through the center of the spring, the steel wire rope is connected to and fixed at the top of the bottom of the innermost pipe section.

[0034] A spring 10 is installed between each adjacent pipe segment. When the shaft 7 rotates, tightening the wire rope, the spring 10 overcomes its force, retracting and compressing the movable pipe segment. When the shaft 7 rotates in the opposite direction, loosening the wire rope, the spring 10 stretches the movable pipe segment. Aeration holes 5 are distributed along the movable pipe segment, with a diameter of 3mm. The spacing between the holes decreases from 10cm at the top of the first movable pipe segment to 5cm at the end of the last movable pipe segment, ensuring uniform airflow throughout the stockpile.

[0035] Workflow:

[0036] S1 Feeding stage: When the material conveying equipment is started, a retraction command is sent to the electric motor 8, the movable pipe section is retracted into the main pipe section, and the telescopic aeration pipe is completely retracted to above the material to avoid interference with the forklift;

[0037] S2 fermentation stage: After the material is filled, the electric motor 8 drives the shaft to move, the movable pipe section extends, the conical head 6 is inserted into the material pile to 5 cm from the bottom of the tank, and the aeration fan starts to supply oxygen;

[0038] S3 discharge stage: After fermentation is completed, the aeration pipe is retracted again and the pile is kept out of the way during emptying.

[0039] When the telescopic aeration tube is contracted and extended, the aeration tube is ventilated first and then extended.

[0040] The contents described in this specification are merely an enumeration of implementation forms of the inventive concept, and the protection scope of the present invention should not be considered as being limited to the specific forms described in the embodiments.

Claims

1. An aerobic fermentation aeration device for organic waste, characterized in that The invention comprises a hollow horizontal frame (2) and a telescopic aeration pipe, wherein the hollow horizontal frame (2) is fixed horizontally above the fermentation tank, and adopts a hollow tubular structure, wherein a main air cavity is formed inside, one end of the hollow horizontal frame is connected to the aeration fan via a flange, and the other end is closed; a plurality of air path interfaces (3) are arranged at equal intervals at the bottom of the hollow horizontal frame (2), and each air path interface (3) is connected to a telescopic aeration pipe (4) via a quick-release joint; The telescopic aeration pipe (4) comprises a plurality of mutually nested pipe sections, consisting of a main pipe section and a nested movable pipe section. The upper end of the main pipe section is fixed below the hollow cross frame (2) and connected to the corresponding air path interface (3). The movable pipe section can be extended and retracted along the axial direction of the main pipe section. Aeration holes (5) are distributed along the pipe body of each movable pipe section.

2. The aerobic fermentation aeration device for organic waste according to claim 1, characterized in that In the nested connection structure of two adjacent pipe sections, a clamping ring is provided on the inner side of the bottom pipe opening of the upper pipe section, and a convex ring is provided on the outer side of the top of the adjacent lower pipe section. The clamping ring can limit the convex ring and prevent the movable pipe section from falling out during the extension and contraction process; and a sealing rubber is provided on the inner side of the clamping ring to prevent the gas from escaping from the gap between the two adjacent pipe sections during the extension and contraction process of the movable pipe section.

3. The aerobic fermentation aeration device for organic waste according to claim 1, characterized in that The diameter of the aeration holes (5) is 2-5 mm.

4. The aerobic fermentation aeration device for organic waste according to claim 1, characterized in that Along the direction from top to bottom, the hole spacing of the aeration holes (5) on the movable pipe section gradually decreases.

5. The aerobic fermentation aeration device for organic waste according to claim 1, characterized in that The bottom end of the innermost movable pipe section is arranged as a conical head (6) to reduce resistance when inserted into a pile of materials.

6. The aerobic fermentation aeration device for organic waste according to claim 1, characterized in that It also includes a steel wire rope (9), a spring (10) is provided between two adjacent pipe sections, one end of the steel wire rope (9) passes from the top outside of the main pipe section into the inner center thereof, and after passing through the inner centers of all movable pipe sections, is fixedly connected to the bottom end of the innermost movable pipe section, and the other end of the steel wire rope (9) is connected to the driving mechanism; When the driving mechanism tightens the wire rope, the elastic force of the spring (10) is overcome and the movable pipe section is retracted and compressed. When the driving mechanism acts in the reverse direction to loosen the wire rope, the movable pipe section is pulled out and extended under the elastic force of the spring (10).

7. The aerobic fermentation aeration device for organic waste according to claim 6, characterized in that A horizontal porous plate is provided on the inner side of the top pipe opening of each pipe section, and a spring is connected to the center of the porous plate to fix the spring; the steel wire rope (9) passes through the center of the spring, one end of the steel wire rope (9) is fixedly connected to the bottom end of the innermost movable pipe section, and the other end of the steel wire rope (9) passes through the porous plate of the main pipe section.

8. The aerobic fermentation aeration device for organic waste according to claim 6, characterized in that The driving mechanism comprises an electric motor (8) and a rotating shaft (7), a steel wire rope (9) is wound around the rotating shaft (7), and the electric motor (8) can drive the rotating shaft (7) to rotate forward or reverse, thereby tightening or loosening the steel wire rope (9).

9. The aerobic fermentation aeration device for organic waste according to claim 1, characterized in that The lengths of the various pipe sections are equal.

10. The aerobic fermentation aeration device for organic waste according to claim 1, characterized in that The hollow cross frame (2) is anchored on the top beam of the factory building through the I-steel fixing frame (1). The surface of the hollow cross frame (2) is coated with a corrosion-resistant coating. A dustproof sealing ring is provided at the air path interface (3) below the hollow cross frame (2). The telescopic aeration pipe (4) is made of wear-resistant material.

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