A high-solid fermentation biogas production equipment for kitchen waste

Abstract

The utility model relates to a kind of improve kitchen garbage high solid-state fermentation methane production equipment, including reaction tank, the upper end of the reaction tank is equipped with upper cover, the lower end of the upper cover is equipped with helical flow guide groove, and the lower end central position of the upper cover is equipped with stirring assembly, the stirring assembly includes straight rod, the outer surface of the straight rod is evenly distributed straight paddle, and the outer surface of the straight rod is equipped with Z-shaped connecting rod near the position of reaction tank bottom;By setting helical flow guide groove, double vortex is formed by cooperating rotating straight paddle, when low viscosity material produces laminar flow, helical flow guide groove enhances radial mixing, when high viscosity material forms turbulent flow, helical flow guide groove automatically weakens vortex intensity, pure mechanical structure realizes self-regulation, reduce maintenance cost, production cost;By setting cleaning brush, it is repeatedly brushed on the upper surface of filter plate with the rotation of straight rod, prevent acidification after kitchen garbage residue from blocking filter plate.

Description

Technical Field

[0001] This utility model relates to the field of kitchen waste treatment technology, and in particular to a device for improving the biogas production from high-solid-state fermentation of kitchen waste. Background Technology

[0002] Currently, the main technologies for treating and disposing of food waste both domestically and internationally include feed processing, sanitary landfill, composting, incineration, and anaerobic digestion. Compared to other technologies, anaerobic digestion has significant advantages. It can not only effectively treat food waste but also produce biogas energy and highly efficient organic fertilizer, achieving the reduction, harmlessness, and resource utilization of food waste, which is of great significance to the sustainable development of the environment and economy. When food waste undergoes high-temperature, high-solid-state fermentation, it needs to be crushed beforehand to hydrolyze and acidify it for further addition of chemicals and anaerobic fermentation. During the crushing, hydrolysis, and acidification process, the food waste is prone to contain adhering substances, which can reduce the uniformity of hydrolysis and acidification. These adhering substances easily stick to the inner wall of the device. Therefore, in order to improve the uniformity of material mixing, increase the efficiency of full reaction, and reduce energy consumption, we have designed a device to improve the biogas production from high-solid-state fermentation of food waste.

[0003] Chinese utility model patent CN202221186594.6 discloses a high-efficiency biogas production system using anaerobic fermentation of kitchen waste, comprising: a fermentation tank, a positioning cover plate fixedly connected to the top of the fermentation tank, a drive assembly connected to the top of the positioning cover plate via a limiting frame, a rotating shaft fixedly connected to the output main shaft of the drive assembly via a linkage shaft, the rotating shaft extending into the inner cavity of the fermentation tank, and a processing assembly for processing kitchen waste connected to the upper part of the linkage shaft. This invention uses elastic ribs to drive the oblique blades to slide, separating easily trapped adhesives inside kitchen waste, thus improving separation efficiency and uniformity during hydrolysis and acidification. Simultaneously, the positioning support rod moves in a synchronized circular motion, and the scraper removes the mixture adhering to the inner wall of the fermentation tank, reducing the residue of kitchen waste mixture inside the fermentation tank. The scraper also reduces resistance during rotation, increasing structural strength and making it less prone to deformation. However, this equipment has the following problems: firstly, it lacks a self-adjusting stirring structure, making it impossible to adjust the stirring effect according to the viscosity of the material; secondly, it lacks an energy-saving design, increasing the cost of kitchen waste treatment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by setting up spiral guide channels, straight blades, and cleaning brushes to solve the technical problems of low material mixing uniformity, insufficient material reaction, and high production energy consumption in the existing anaerobic fermentation process of kitchen waste.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for improving biogas production from high-solid-state fermentation of kitchen waste includes a reaction tank. The upper end of the reaction tank is provided with a top cover, and the lower end of the top cover is provided with a spiral guide groove located inside the reaction tank. A stirring assembly is provided at the center of the lower end of the top cover. The stirring assembly includes a straight rod with straight blades evenly distributed on its outer surface. A Z-shaped connecting rod is provided on the outer surface of the straight rod near the bottom of the reaction tank.

[0007] As a preferred embodiment, the lower end of the Z-shaped connecting rod is provided with a cleaning brush, and the lower end of the cleaning brush abuts against the filter plate.

[0008] As a preferred embodiment, the filter plate has a fixing ring at the upper middle part and a limiting step at the lower edge of the filter plate. A straight rod is sleeved on the inner surface of the fixing ring, and the upper part of the straight rod passes through the surface of the upper cover and is fixedly connected to a rotary motor.

[0009] As a preferred embodiment, the spiral guide channel includes a spiral base plate, and a spiral baffle is provided at the upper end of the spiral base plate.

[0010] As a preferred embodiment, the reaction vessel is provided with a discharge port on the lower left side and an exhaust pipe on the upper right side of the surface of the reaction vessel.

[0011] As a preferred embodiment, the discharge port is equipped with a silicone duckbill valve, and the lower surface of the reaction vessel is evenly distributed with support feet.

[0012] The beneficial effects of this utility model are:

[0013] (1) In this utility model, a spiral guide channel is set up to form a double vortex with the rotating straight blade. The fixed pitch and direction of the spiral guide channel will change the fluid flow path. Its spiral structure forms a local pressure difference in the fluid, which promotes the uniform distribution of materials during the flow process. When low viscosity materials generate laminar flow, the spiral guide channel enhances radial mixing. When high viscosity materials form turbulence, the spiral guide channel automatically weakens the vortex intensity. The pure mechanical structure realizes self-adjustment, reducing maintenance costs and production costs.

[0014] (2) In this utility model, by setting a straight blade, which rotates under the drive of a rotary motor, the material in the reaction tank forms a vortex, making the material mix more thoroughly, thereby improving the generation of biogas.

[0015] (3) In this utility model, a cleaning brush is set up, which rotates with the straight rod to repeatedly brush the upper surface of the filter plate, so as to prevent the acidified kitchen waste residue from clogging the filter plate and ensure the filtration effect of the filter plate.

[0016] In summary, this equipment has the advantages of simple structure and self-regulating stirring, and is especially suitable for the field of food waste treatment technology. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a high-solid-state fermentation biogas production equipment.

[0019] Figure 2 This is a schematic diagram of the structure of the stirring assembly and the spiral guide channel.

[0020] Figure 3 This is a structural diagram of the cleaning brush section. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figures 1 to 3 As shown, this utility model provides a device for improving the biogas production from high-solid-state fermentation of kitchen waste, including a reaction tank 1. Kitchen waste undergoes hydrolysis and acidification before high-solid-state fermentation inside the reaction tank 1. A sealing door is provided on the surface of the reaction tank 1 for easy cleaning and maintenance. The upper end of the reaction tank 1 is provided with a top cover 2, and a feed inlet is located on the left side of the top cover 1, which automatically closes after feeding. The top cover 2 and the reaction tank 1 have a good sealing effect. The lower end of the top cover 2 is provided with a spiral guide groove 3, which is located inside the reaction tank 1. Together with a rotating straight blade 42, it forms a double vortex. When low-viscosity materials generate laminar flow, the spiral guide groove... 3. Enhanced radial mixing: When high-viscosity materials form turbulence, the spiral guide channel 3 automatically weakens the vortex intensity. The purely mechanical structure achieves self-adjustment, reducing maintenance and production costs. Furthermore, a stirring assembly 4 is provided at the lower center of the upper cover 2. The stirring assembly 4 includes a straight rod 41 with straight blades 42 evenly distributed on its outer surface. It is a four-bladed blade that rotates under the drive of the rotary motor 5, causing the materials in the reaction tank 1 to form vortices, making the materials more thoroughly mixed, thereby increasing biogas production. A Z-shaped connecting rod 43 is provided on the outer surface of the straight rod 41 near the bottom of the reaction tank 1, providing installation space for the cleaning brush 44.

[0024] Furthermore, such as Figure 3 As shown, the lower end of the Z-shaped connecting rod 43 is provided with a cleaning brush 44. The lower end of the cleaning brush 44 abuts against the filter plate 11. The cleaning brush 44 rotates with the straight rod 41 to repeatedly brush the upper surface of the filter plate 11, preventing the acidified kitchen waste residue from clogging the filter plate 11 and ensuring the filtration effect of the filter plate.

[0025] Furthermore, a fixing ring 12 is provided at the upper middle part of the filter plate 11 to limit the lower end position of the straight rod 41 and reduce the shaking generated during rotation. A limiting step 13 is provided at the lower edge of the filter plate 11 to limit the position of the filter plate 11 in the reaction vessel 1. The straight rod 41 is sleeved on the inner surface of the fixing ring 12. The upper part of the straight rod 41 passes through the surface of the upper cover 2 and is fixedly connected to the rotary motor 5. The rotary motor 5 drives the stirring assembly 4 to rotate.

[0026] Furthermore, such as Figure 2 As shown, the spiral guide channel 3 includes a spiral base plate 31, and a spiral baffle 32 is provided at the upper end of the spiral base plate 31 to increase the contact area between the spiral guide channel and the material vortex, thereby ensuring the double vortex strength between the spiral guide channel and the straight blade 41.

[0027] Furthermore, a discharge port 14 is provided at the lower left side of the reaction tank 1, and the aqueous phase material produced after fermentation is discharged from the discharge port 14. An exhaust pipe 16 is provided at the upper right side of the surface of the reaction tank 1, and the gaseous phase material produced in the reaction tank 1 leaves through the exhaust pipe 16 and enters the next process for purification.

[0028] Furthermore, such as Figure 1 As shown, the discharge port 14 is equipped with a silicone duckbill valve, which adopts a silicone duckbill valve structure to adaptively discharge materials. The lower surface of the reaction vessel 1 is evenly distributed with support feet 15 to increase the height above the ground.

[0029] Working process: First, the acidified kitchen waste is fed into the reaction tank 1 through the feed port of the top cover 2; then, the rotary motor operates, driving the straight rod 41 to rotate, causing the straight blade 42 to rotate, making the material form a vortex; further, the fixed pitch and direction of the spiral guide groove 3 will change the fluid flow path, and its spiral structure will form a local pressure difference in the fluid, thereby causing the vortex to impact the spiral guide groove 3, forming a double vortex, which promotes the uniform distribution of the material during the flow process; further, the cleaning brush 44 rotates with the straight rod 41, repeatedly brushing the upper surface of the filter plate 11.

[0030] In the description of this utility model, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0031] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0032] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A device for improving the biogas production from high-solid-state fermentation of kitchen waste, characterized in that: The reaction vessel (1) is provided with a top cover (2) at the upper end and a spiral guide groove (3) at the lower end of the top cover (2). The spiral guide groove (3) is located inside the reaction vessel (1). A stirring assembly (4) is provided at the center of the lower end of the top cover (2). The stirring assembly (4) includes a straight rod (41). Straight blades (42) are evenly distributed on the outer surface of the straight rod (41). A Z-shaped connecting rod (43) is provided on the outer surface of the straight rod (41) near the bottom of the reaction vessel (1).

2. The equipment for improving biogas production from high-solid-state fermentation of kitchen waste according to claim 1, characterized in that, The lower end of the Z-shaped connecting rod (43) is provided with a cleaning brush (44), and the lower end of the cleaning brush (44) abuts against the filter plate (11).

3. The equipment for improving biogas production from high-solid-state fermentation of kitchen waste according to claim 2, characterized in that, The filter plate (11) has a fixing ring (12) at the middle of its upper end and a limiting step (13) at the lower edge of its lower end. A straight rod (41) is sleeved on the inner surface of the fixing ring (12), and the upper part of the straight rod (41) passes through the surface of the upper cover (2) and is fixedly connected to a rotary motor (5).

4. The equipment for improving biogas production from high-solid-state fermentation of kitchen waste according to claim 1, characterized in that, The spiral guide groove (3) includes a spiral base plate (31), and a spiral baffle (32) is provided at the upper end of the spiral base plate (31).

5. The equipment for improving biogas production from high-solid-state fermentation of kitchen waste according to claim 1, characterized in that, The reaction vessel (1) has a discharge port (14) on the lower left side and an exhaust pipe (16) on the upper right side of the surface of the reaction vessel (1).

6. The equipment for improving biogas production from high-solid-state fermentation of kitchen waste according to claim 5, characterized in that, The discharge port (14) is equipped with a silicone duckbill valve, and the lower surface of the reaction vessel (1) is evenly distributed with support feet (15).

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