Biological drying and aeration system for perishable garbage

Abstract

The application provides a novel perishable garbage biological drying aeration system, a fermentation bin is arranged in the barrel of the outer shell of a tower type treatment device, the aeration system comprises an aeration and suction unit, an aeration and suction device is arranged outside the barrel of the aeration and suction unit, an aeration and suction pipe is connected to the aeration and suction device, a layered aeration zone is arranged in the fermentation bin of the barrel, a first pipeline is arranged in each layer of the aeration zone, and the other end of the aeration and suction pipe is connected with the first pipeline and communicates with the first pipeline through the barrel. The aeration and suction unit arranged in layers is matched with the gas collecting unit at the top to complete aeration and waste gas suction, and the mixture is mixed by the stirring component of the stirring unit rotating around the center and is aerated, so that the reproduction of the aerobic fermentation bacteria group in the aeration system is improved, the efficiency of the tower type perishable garbage biological drying is improved, the waste gas is dehumidified and purified by the top treatment unit and is discharged up to the standard, the influence on the surrounding environment is reduced, and the drying treatment of large-scale perishable garbage can be adapted.

Description

Technical Field

[0001] This invention relates to the field of biological drying treatment technology for perishable waste, specifically to a novel aeration system for biological drying of perishable waste. Background Technology

[0002] The disposal of perishable waste has always been one of the challenges in urban waste management. Due to its high moisture content and tendency to decompose, traditional methods such as landfill and incineration present numerous problems. Landfilling can lead to soil and groundwater pollution, while incineration may produce toxic and harmful gases, causing secondary damage to the environment. Therefore, developing a new and environmentally friendly method for treating perishable waste has become an urgent need.

[0003] Bio-drying is an emerging aerobic microbial treatment technology for organic solid waste. It rapidly removes moisture through bio-fermentation, requires little external heat energy, and has a significant volume reduction effect. It is an effective way for regions in eastern coastal my country that mainly rely on incineration to solve the problem of perishable waste disposal and to rationally allocate existing facility resources.

[0004] Currently, the main biological drying processes for perishable waste are drum-type and tower-type processes. These typically involve a large mixing device in the center, achieving thorough mixing through frequent stirring, supplemented by forced ventilation and oxygen supply. Compared to the traditional windrow processing, this is more efficient. However, the drum-type process is limited in scale due to the manufacturing cost and difficulty of the drum structure. The tower-type process, on the other hand, can utilize reinforced concrete structures, resulting in lower construction costs and adjustable dimensions, making it more adaptable and able to meet the current demand for processing massive amounts of perishable waste. However, because the material is stacked relatively high in tower-type processes, current aeration technology relies mainly on aeration nozzles at the bottom, leading to poor actual aeration efficiency. This significantly impacts the efficiency of biological drying and limits the expansion and promotion of existing tower-type processes, thus limiting the current biological drying systems for perishable waste. Summary of the Invention

[0005] The purpose of this invention is to provide an aeration system that can enhance aeration and exhaust gas extraction efficiency to improve the rapid drying and harmless treatment of perishable waste.

[0006] Therefore, the present invention adopts the following technical solution:

[0007] A novel biological drying and aeration system for perishable waste includes a fermentation chamber located inside the outer shell of a tower-type treatment device. The aeration system comprises an aeration unit with an aeration device connected to an aeration pipe on the outside of the chamber. The fermentation chamber contains tiered aeration zones, each with a first pipe. The other end of the aeration pipe passes through the chamber and connects to the first pipe, supplying oxygen for the aerobic fermentation of the material within the chamber. A feed inlet is located at the top of the chamber, and openable / closable discharge outlets are located on the walls of each aeration zone. A gas collection unit and a treatment unit are located inside and outside the chamber, respectively. The gas collection unit is connected to the treatment unit. An air suction pipe is also connected to the aeration device, with the other end of the suction pipe connected to the treatment unit, for drawing away any escaping waste gas and water vapor. A stirring unit is located within the fermentation chamber, with stirring components and aeration holes in each aeration zone.

[0008] Furthermore, a circulating alternating feeding device is provided between the discharge ports on the same side to mix the materials in each aeration zone.

[0009] Furthermore: the aeration layer is arranged in the height direction of the cylinder, the top of the cylinder is provided with a feed inlet, and the processing unit is installed on the top of the cylinder and is offset from the feed inlet.

[0010] Furthermore: the aeration pipe is arranged around the inner wall of the fermentation chamber, and the aeration pipe wall is provided with an inward opening.

[0011] Furthermore: the aeration equipment has aeration pumps installed in the outer layer of the cylinder and the aeration zone, and the aeration pumps are connected to the first pipe of the corresponding layer through aeration pipes.

[0012] Furthermore, the suction pipe includes segmented pipes, which connect the aeration pumps of adjacent layers and the top aeration pump and processing unit.

[0013] The mixing unit is equipped with an aeration device. The mixing component includes a mixing shaft that rotates around the center of each aeration zone. The aeration holes are located on the mixing shaft and are connected to the aeration device through pipes.

[0014] Furthermore, the cylinder is equipped with a gas collection unit at the top of its fermentation chamber, and the gas collection unit is connected to the processing unit.

[0015] Furthermore: the gas collection unit includes a second pipe, which is located in the area below the processing unit and is fixedly connected to the top wall of the fermentation chamber. The second pipe has an outward opening on its pipe wall. The processing unit has a hole at the bottom, and a connecting pipe is provided on the hole. The bottom end of the connecting pipe passes through the top wall of the fermentation chamber and communicates with the second pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention utilizes a layered aeration unit in conjunction with a top-mounted gas collection unit to achieve both aeration and waste gas extraction. Combined with a centrally rotating mixing unit that mixes materials and provides aeration, this system promotes the proliferation of aerobic fermentation bacteria within the aeration system, improving the efficiency of tower-type biodegradation of perishable waste. Simultaneously, the top treatment unit dehumidifies and purifies the waste gas before discharge, minimizing environmental impact. The system is suitable for large-scale drying of perishable waste and is simple, efficient, and cost-effective. Furthermore, while the mixing and aeration in each layer of the mixing unit are combined, the system continuously circulates alternating material discharge from the layered outlets and mixes material from the top inlet, ensuring thorough mixing and loosening of the materials and enhancing the aeration effect. Attached Figure Description

[0018] Figure 1 This is an isometric view of the aeration system of the present invention;

[0019] Figure 2 This is a front view of the aeration system of the present invention;

[0020] Figure 3 This is a top view of the aeration system of the present invention;

[0021] Figure 4 This invention is an aeration system Figure 3 AA section view in the middle;

[0022] Figure 5 This invention is an aeration system Figure 3 BB section view in the middle;

[0023] Figure 6 This is a front view of the stirring unit and its stirring shaft of the present invention;

[0024] Figure 7 This is a schematic diagram of the connection of each pipe in the cylinder of the aeration system of the present invention;

[0025] Figure 8 This invention is an aeration system Figure 7 Enlarged diagram of point C in the diagram;

[0026] Figure 9 This invention is an aeration system Figure 7 Enlarged diagram of point D in the diagram.

[0027] The labels in the attached diagram are as follows: 1-Aeration unit, 101-Aeration equipment, 102-Aeration pipe, 103-First pipe, 1031-Inward opening, 104-Suction pipe, 2-Stirring unit, 21-Stirring shaft, 201-Aeration hole, 3-Gas collection unit, 301-Second pipe, 302-Outward opening, 303-Hole, 4-Processing unit, 5-Discharge port, 6-Inlet port, 7-Cylinder. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0029] like Figure 1-9 As shown, a novel biological drying and aeration system for perishable waste includes a fermentation chamber inside the cylindrical shell 7 of a tower-type treatment device. The bottom of the cylindrical shell 7 is circular, and the overall shape is elongated. The aeration system includes an aeration unit 1, which has an aeration device 101 installed outside the cylindrical shell 7. The aeration device 101 is connected to an aeration pipe 102. The fermentation chamber of the cylindrical shell 7 has stratified aeration zones, which are stratified along the height of the cylindrical shell 7. The cylindrical shell 7 is divided into three equal aeration zones at equal points along its height. Each aeration zone has a first pipe 103 installed. The other end of the aeration pipe 102 passes through the cylindrical shell 7 and connects to the first pipe 103 to supply oxygen for the aerobic fermentation of the material in the fermentation chamber. The top of the body 7 is staggered with a feed inlet 6 and a processing unit 4. The feed inlet 6 is located at the center of the top of the body 7, and the processing units 4 are evenly distributed outside the feed inlet 6 at the top of the body 7. The body 7 is equipped with a gas collection unit 3 at the top of its fermentation chamber, which is connected to the processing unit 4. The aeration device 101 is also connected to a suction pipe 104, the other end of which is connected to the processing unit 4 to draw the escaping waste gas and water vapor to the processing unit 4. The body 7 has an openable or closable discharge port 5 on the wall of each aeration zone. The fermentation chamber is equipped with a stirring unit 2, which has stirring components in each aeration zone. The stirring components are equipped with aeration holes 201, and aeration is started while stirring.

[0030] In this embodiment, the processing unit 4 is set up in accordance with the number of aeration units 1, so that the aeration units 1 on the same side of the whole tower treatment device have aeration and exhaust gas suction functions. Under the action of the processing unit 4 on the same side, the exhaust gas is dehumidified and purified to meet the standard for discharge. In addition, the aeration exhaust gas suction of the tower treatment device is timely and effectively ensured in terms of power and achievable efficiency.

[0031] In this embodiment, the aeration pipe 102 is arranged around and closely attached to the inner wall of the fermentation chamber, and is located above the discharge port 5. The aeration pipe 102 has evenly distributed concentric inward openings 1031 on its inner circumference wall. Simultaneously, the aeration device 101 has aeration pumps arranged in layers outside the cylinder 7, corresponding to the aeration zone. These pumps perform both aeration and suction functions, and are connected to the first pipe 103 of the corresponding layer via the aeration pipe 102, thereby performing aeration and waste gas suction for the tower-type treatment device.

[0032] In this embodiment, the suction pipe 104 includes segmented pipes that connect the aeration pumps of adjacent layers and the top aeration pump and the processing unit 4. That is, the suction pipe 104 is arranged along the height direction of the cylinder 7, connected to the aeration pumps of different layers at the same position on the plane, and finally connected to the top processing unit 4.

[0033] Each layer of aeration pumps compresses air and injects it into the first pipe 103 through the aeration pipe 102. Oxygen is then supplied to the fermentation material in the fermentation chamber through the inward opening 1031 on the annular first pipe 103. Waste gas and water vapor generated during the fermentation process can also be drawn in by the aeration pumps and sequentially transported to the treatment unit 4 via the first pipe 103, the aeration pipe 102, and the suction pipe 104. The aeration pumps on the same layer are all connected to the first pipe 103 of the corresponding layer, providing simultaneous aeration to ensure aeration pressure and volume.

[0034] In this embodiment, the aeration unit 1 and the discharge port 5 are evenly and alternately arranged on the outer periphery of the cylinder 7 of the tower-type treatment device. In this embodiment, the cylinder 7 has platforms on the outer periphery of each aeration zone for further placement or fixation of the aeration pump, and these platforms must be able to accommodate the movement and transportation of maintenance personnel and small equipment.

[0035] In this embodiment, the stirring component has a rotation center at the center of each aeration zone, so that the stirring component of each layer can rotate around the rotation center, stirring and mixing the materials in each layer, and at the same time pushing the fermentation material in the fermentation chamber to move towards the discharge port 5 of the same layer; the stirring unit 2 is equipped with an aeration device, and the stirring component includes a stirring shaft 21 that rotates around the center of each aeration zone. The aeration holes 201 are located on the stirring shaft 21 and are connected to the aeration device through pipes. Furthermore, a circulating alternating feeding device is provided between the discharge ports 5 on the same side. The alternating feeding device includes a hopper, a guide rail, and a lifting device. The guide rail is arranged vertically on the outside of the cylinder 7, and the hopper is installed in the guide rail. Through the connection between the hopper and the lifting device, the hopper is driven to move to the target layer discharge port 5 where the material is to be discharged. By opening the baffle at the discharge port 5, some of the material in the fermentation chamber moves to the hopper and moves to the top under the action of the lifting device. After mixing with fresh perishable waste, it enters the fermentation chamber again through the feed inlet 6 for fermentation.

[0036] In this embodiment, the gas collection unit 3 includes an annular second pipe 301. The second pipe 301 is arranged concentrically with the feed inlet 6. The second pipe 301 is located in the area below the processing unit 4 and is fixedly connected to the top wall of the fermentation chamber. The second pipe 301 has outward openings 302 evenly arranged on its outer peripheral side wall. The processing unit 4 has a hole 303 at the bottom. A connecting pipe is provided on the hole 303. The bottom end of the connecting pipe passes through the top wall of the fermentation chamber and communicates with the second pipe 301. The gas collection unit 3 is connected to the processing unit 4 through the connecting pipe.

[0037] Please see Figure 1-9 When the tower-type treatment device is aerated through this aeration system, the specific details are as follows:

[0038] While the stirring component of stirring unit 2 rotates around the center of the mixing layer, it aerates the fermentation material through the aeration holes 201 on the stirring shaft 21. When the stirring component rotates to the vicinity of the discharge port 5, the discharge port 5 opens and the material begins to be discharged. The discharge ports 5 of each layer alternately discharge material in the same direction. The material discharged from each layer is lifted to the top and mixed with fresh perishable waste before entering the tower treatment device for fermentation again through the feed port 6. At the same time as the stirring and discharging, the aeration unit 1 first draws the escaping waste gas and water vapor into the treatment unit 4 located at the top. After the discharge port 5 is closed, aeration is carried out again to supply oxygen for the aerobic fermentation of the material in the fermentation chamber. The gas collection unit 3 at the top of the tower treatment device is started intermittently to draw waste gas and water vapor through the connecting pipe to the treatment unit 4. The treatment unit 4 dehumidifies and purifies the nearly saturated waste gas before discharging it in compliance with standards.

[0039] The above embodiments are merely preferred technical solutions of the present invention. Those skilled in the art should understand that modifications or substitutions to the technical solutions or parameters in the embodiments can be made without departing from the principles and essence of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A biological drying and aeration system for perishable waste, wherein a fermentation chamber is provided inside the cylinder (7) of the outer shell of a tower-type treatment device, characterized in that: The aeration system includes an aeration unit (1), which has an aeration device (101) installed outside the cylinder (7). The aeration device (101) is connected to an aeration pipe (102). The fermentation chamber of the cylinder (7) is provided with a layered aeration zone. Each layer of the aeration zone is provided with a first pipe (103). The other end of the aeration pipe (102) passes through the cylinder (7) and is connected to the first pipe (103) to supply oxygen for the aerobic fermentation of the material in the fermentation chamber. The top of the cylinder (7) is provided with a feed inlet (6), and the cylinder (7) has an openable or closable discharge outlet (5) on the cylinder wall of each aeration zone. The cylinder (7) is provided with a gas collection unit (3) and a treatment unit (4) on its inner and outer sides respectively. The gas collection unit (3) is connected to the treatment unit (4). The aeration device (101) is also connected with a suction pipe (104). The other end of the suction pipe (104) is connected to the treatment unit (4) to draw the escaping waste gas and water vapor to the treatment unit (4). The fermentation chamber is equipped with a stirring unit (2), and the stirring unit (2) is equipped with stirring components in each aeration zone, and the stirring components are equipped with aeration holes (201). A circulating alternating feeding device is provided between the discharge ports (5) on the same side to mix the materials in each aeration zone; The aeration layer is arranged in the height direction of the cylinder (7), and the processing unit (4) is installed on the top of the cylinder (7) and is offset from the feed inlet (6); An aeration device is provided inside the stirring unit (2). The stirring component includes a stirring shaft (21) that rotates around the center of each aeration zone. The aeration hole (201) is located on the stirring shaft (21) and is connected to the aeration device through a pipe. The gas collection unit (3) includes a second pipe (301), which is located in the area below the processing unit (4) and is fixedly connected to the top wall of the fermentation chamber. The second pipe (301) has an outward opening (302) on its pipe wall. The processing unit (4) has a hole (303) at the bottom, and a connecting pipe is provided on the hole (303). The bottom end of the connecting pipe passes through the top wall of the fermentation chamber and communicates with the second pipe (301).

2. The biological drying and aeration system for perishable waste according to any one of claims 1, characterized in that: The aeration pipe (102) is arranged around the inner wall of the fermentation chamber, and the aeration pipe (102) has an inward opening (1031) on its wall.

3. The biological drying and aeration system for perishable waste according to claim 1, characterized in that: The aeration device (101) has an aeration pump installed in the same layer as the aeration zone outside the cylinder (7). The aeration pump is connected to the first pipe (103) of the corresponding layer through the aeration pipe (102).

4. The biological drying and aeration system for perishable waste according to claim 3, characterized in that: The suction pipe (104) includes a segmented pipe, which connects the aeration pumps of adjacent layers and the aeration pump of the top layer to the processing unit (4).

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