Kitchen waste high-efficiency anaerobic fermentation equipment adopting dynamic mixing technology

Abstract

The utility model relates to a kind of high-efficiency anaerobic fermentation equipment of kitchen garbage using dynamic mixing technology, a kind of high-efficiency anaerobic fermentation equipment of kitchen garbage using dynamic mixing technology, including annular support, the lower end of the annular support is equipped with four support feet, annular support inner wall is fixedly connected fermentation tank, the lower end center of the fermentation tank is equipped with discharge port, the left side of the lower end of the fermentation tank is equipped with liquid discharge port, the left side of the upper end of the fermentation tank is equipped with feed inlet, the right side of the upper end of the fermentation tank is equipped with gas collection port, the upper end center position of the fermentation tank is equipped with motor, the lower end center output end of the motor is connected output shaft, the lower side terminal of the output shaft is connected disc, the disc outer edge is evenly distributed stirring arm, the lower end center of the disc is equipped with equipment rod, the lower end of the equipment rod is fixedly connected double-cone guide body, with the advantages that the mixing efficiency of material anaerobic fermentation is improved, and stable anaerobic fermentation process is maintained.

Description

Technical Field

[0001] This utility model relates to the field of anaerobic fermentation technology, and in particular to a high-efficiency anaerobic fermentation equipment for kitchen waste using dynamic mixing technology. Background Technology

[0002] Biogas fermentation, also known as anaerobic digestion or anaerobic fermentation, refers to the process by which organic matter (such as human and livestock manure, straw, weeds, etc.) is decomposed and metabolized by various microorganisms under specific moisture, temperature, and anaerobic conditions, ultimately forming a combustible mixture of gases such as methane and carbon dioxide. Biogas fermentation systems are based on the principles of biogas fermentation, aiming at energy production and ultimately achieving the comprehensive utilization of biogas, biogas slurry, and biogas residue.

[0003] Patent application number CN202223485804.4 is a Chinese utility model patent, disclosing a micro-anaerobic fermentation gas collection device. It includes a fermenter, a pre-installed pipe, an exhaust pipe, and a collection pipe, all connected to the fermenter. The collection pipe is equipped with a gas collecting component, and the exhaust pipe has a sealing section containing a sealing liquid for liquid sealing the exhaust pipe. Based on this, it achieves high airtightness, facilitates gas collection after fermentation, and allows for sampling and testing during fermentation. It enables effective and continuous anaerobic fermentation, has a small footprint, is simple to operate, and is easy to build. However, this device has the following problems: firstly, it cannot improve mixing efficiency; secondly, it cannot prevent crust formation on the inner wall of the fermenter. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies. This device solves the technical problem of its inability to improve mixing efficiency by setting a double-cone guide body at the bottom center of the fermenter and having spirally distributed grooves on the outer wall. Furthermore, by incorporating a motor-driven rotating stirring arm with its extension closely fitting the inner wall of the fermenter, it addresses the technical problem of preventing crust formation on the fermenter's inner wall.

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

[0006] A high-efficiency anaerobic fermentation device for kitchen waste using dynamic mixing technology includes a ring-shaped support frame with four supporting legs at its lower end. A fermentation tank is fixedly connected to the inner wall of the ring-shaped support frame. The fermentation tank has a discharge port at its lower center, a liquid drain port on its lower left side, a feed inlet on its upper left side, and a gas collection port on its upper right side. A motor is located at the upper center of the fermentation tank. The lower center of the motor is connected to an output shaft, and the lower end of the output shaft is connected to a disc. Stirring arms are evenly distributed along the outer edge of the disc. A device rod is located at the lower center of the disc, and a double-cone guide body is fixedly connected to the lower end of the device rod.

[0007] As a preferred embodiment, the diameters of both the upper and lower ends of the double-cone guide are smaller than the center diameter, and grooves are evenly distributed on the outer wall of the double-cone guide.

[0008] As a preferred embodiment, the double-cone guide body is located at the bottom center of the fermenter.

[0009] As a preferred embodiment, the grooves are distributed in a spiral shape along the outer wall of the double-cone guide body, and the spiral direction is consistent with the rotation direction of the motor drive output shaft.

[0010] As a preferred embodiment, the stirring arm includes a connecting part and an extension part, the connecting part and the extension part being in the shape of a "7". The connecting part is fixedly connected to the outer edge of the disc, and the extension part is close to the inner wall of the fermentation tank on its outer side.

[0011] As another preferred embodiment, the stirring arms are provided in eight parts, and each stirring arm has the same structure.

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

[0013] (1) In this utility model, by setting the double cone guide body at the bottom center of the fermentation tank and the spiral grooves distributed on the outer wall, the mixing rate of materials during the anaerobic fermentation process is increased. When the motor drives the output shaft to rotate, the equipment rod will also drive the double cone guide body to rotate. The spiral direction of the spiral grooves evenly distributed on the outer wall of the double cone guide body is consistent with the rotation direction of the motor drive output shaft. When the grooves rotate, centrifugal force is generated, which can push the material deposited at the bottom upward and disperse the deposited material, thereby improving the mixing efficiency of the material during anaerobic fermentation.

[0014] (2) In this utility model, by setting the extension of the stirring arm to be close to the inner wall of the fermentation tank, the material is prevented from forming a thick crust on the inner wall of the fermentation tank during anaerobic fermentation, which would affect the anaerobic fermentation effect. When the motor drives the output shaft to rotate, the disc also rotates. When the disc rotates, it will drive the stirring arm to rotate synchronously. The extension of the eight evenly distributed stirring arms continuously sweeps across the tank wall, preventing the material from accumulating on the inner wall of the fermentation tank and drying out. The material stuck to the inner wall of the fermentation tank will be scraped off in time and rolled back into the material inside the fermentation tank, thus preventing the crust from forming on the inner wall of the fermentation tank and maintaining a stable anaerobic fermentation process.

[0015] In summary, this device has the advantages of improving the mixing efficiency of anaerobic fermentation of materials and maintaining a stable anaerobic fermentation process, and is especially suitable for the field of anaerobic fermentation technology. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the stirring arm and double-cone guide body structure in this utility model.

[0019] Figure 3 This is a schematic diagram of the stirring arm structure in this utility model.

[0020] Figure 4 This is a schematic diagram showing the position of the stirring arm and double cone guide in the fermenter in this utility model. 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 4As shown, this utility model provides a high-efficiency anaerobic fermentation device for kitchen waste using dynamic mixing technology, including a ring-shaped support 1. The ring-shaped support 1 has four supporting legs 11 at its lower end. A fermentation tank 2 is fixedly connected to the inner wall of the ring-shaped support 1. The fermentation tank 2, as the main reaction body, has good airtightness to maintain an anaerobic environment. An outlet 21 is located at the center of the lower end of the fermentation tank 2. The outlet 21 is flanged and connected to an electric valve. The outlet 21 periodically discharges the residue formed after fermentation. It is located at the lowest point of the fermentation tank 2 for easy gravity discharge. A drain port 22 is provided on the left side of the fermentation tank 2. The drain port 22 is flanged and connected to a pipe and a pump. The pipe flange is connected to a valve and an electric valve. A feed port 23 is provided on the left side of the upper end of the fermentation tank 2. The feed port 23, together with the conveying pump, transports the mixture of crushed waste, water and anaerobic bacteria into the fermentation tank 2. A gas collection port 24 is provided on the right side of the upper end of the fermentation tank 2. Space is left at the upper end of the mixed liquid material inside the fermentation tank 2 for biogas to rise and be collected. A pipe extending into the upper part of the fermentation tank 2 is provided at the lower end of the gas collection port 24. The pipe of the gas collection port 24 is located in the biogas collection space, at the upper end of the liquid level. Utilizing the natural rising characteristic of biogas, it is collected and discharged through the gas collection port 24. The gas collection port 24 is connected to the subsequent biogas purification box to realize the energy recovery of biogas. A motor 3 is located at the center of the upper end of the fermentation tank 2. The lower center output end of the motor 3 is connected to the output shaft 31. The output shaft 31 passes through the tank cover and is isolated from the outside by a mechanical seal. The lower end of the output shaft 31 is connected to a disc 32. Stirring arms 321 are evenly distributed along the outer edge of the disc 32. A device rod 322 is located at the center of the lower end of the disc 32. The lower end of the device rod 322 is fixedly connected to a double-cone guide body 323. The rotation of the stirring arms 321, the device rod 323, and the double-cone guide body 323 can achieve the effect of fully mixing the materials and anaerobic fermentation inside the fermentation tank 2.

[0024] Furthermore, the diameters of the upper and lower ends of the double-cone guide 323 are both smaller than the center diameter, and the outer wall of the double-cone guide 323 is uniformly distributed with grooves 3231.

[0025] Furthermore, the double-cone guide 323 is located at the bottom center of the fermenter 2, ensuring that the double-cone guide 323 can participate in the easily deposited areas at the bottom of the fermenter 2.

[0026] Furthermore, the groove 3231 is spirally distributed along the outer wall of the double-cone guide 323, and the spiral direction is consistent with the rotation direction of the output shaft 31 driven by the motor 3. As the motor 3 drives, the output shaft 31 and the disc drive the device rod 322 to rotate synchronously, which also drives the double-cone guide 323 to rotate synchronously with the driving direction of the motor 3. After the material is captured by the groove 3231, it adheres tightly to the tank wall under the action of rotational centrifugal force, and is gradually separated from the bottom sediment layer by the rotational push of the tank surface.

[0027] Furthermore, the stirring arm 321 includes a connecting part 321a and an extension part 321b. The connecting part 321a and the extension part 321b are generally in the shape of a "7". The connecting part 321a is fixedly connected to the outer edge of the disc 32. The extension part 321b is close to the inner wall of the fermentation tank 2 on its outer side. There are some small gaps between the extension part 321b and the inner wall of the tank, which can effectively scrape off the attached material and avoid scratch damage caused by thermal expansion and contraction or slight deformation. When the motor 3 drives the output shaft 31 to rotate, the disc 32 also rotates. When the disc 32 rotates, it will drive the stirring arm 321 to rotate synchronously. The extension parts 321b of the eight evenly distributed stirring arms 321 continuously sweep across the tank wall, preventing the material from accumulating on the inner wall of the fermentation tank 2 and drying out. The material stuck to the inner wall of the fermentation tank 2 will be scraped off in time and rolled back into the material inside the fermentation tank 2, avoiding the crust formation on the inner wall of the fermentation tank 2 and maintaining a stable anaerobic fermentation process.

[0028] Furthermore, there are eight stirring arms 321, and each stirring arm 321 has the same structure.

[0029] Working process: First, the crushed waste material, water, and anaerobic bacteria mixture are fed into the fermenter 2 through the feed inlet 23. Then, the motor 3 starts and drives the output shaft 31 to rotate, which drives the disc 32 and the eight stirring arms 321 fixed to its outer edge to rotate synchronously. The extension 321b of the stirring arm 321 rotates close to the inner wall of the fermenter 2, continuously scraping off the attached material to prevent crusting. Then, the device rod 322 transmits power to the double cone guide body 323. The spiral groove 3231 on the outer wall of the double cone guide body 323, along with the rotation direction, can send the bottom deposited material upward along the spiral angle groove 3231, so that the rising material can fully react with the material inside the fermenter 2. At the same time, the rotation of the stirring arm 321, the device rod 323, and the double cone guide body 323 can also achieve the effect of fully mixing the material and anaerobic fermentation inside the fermenter 2.

[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 high-efficiency anaerobic fermentation device for kitchen waste using dynamic mixing technology, characterized in that: The device includes an annular support (1), which has four supporting feet (11) at its lower end. The inner wall of the annular support (1) is fixedly connected to a fermenter (2). The fermenter (2) has a discharge port (21) at its lower center, a liquid outlet (22) at its lower left side, a feed inlet (23) at its upper left side, a gas collection port (24) at its upper right side, a motor (3) at its upper center, an output shaft (31) at the lower center of the motor (3), a disc (32) at the lower end of the output shaft (31), and stirring arms (321) evenly distributed along the outer edge of the disc (32). A device rod (322) is provided at the lower center of the disc (32), and a double cone guide body (323) is fixedly connected to the lower end of the device rod (322).

2. The high-efficiency anaerobic fermentation equipment for kitchen waste using dynamic mixing technology according to claim 1, characterized in that, The diameters of the upper and lower ends of the double-cone guide (323) are both smaller than the center diameter, and the outer wall of the double-cone guide (323) is uniformly distributed with grooves (3231).

3. The high-efficiency anaerobic fermentation equipment for kitchen waste using dynamic mixing technology according to claim 2, characterized in that, The double-cone guide (323) is located at the bottom center of the fermenter (2).

4. The high-efficiency anaerobic fermentation equipment for kitchen waste using dynamic mixing technology according to claim 3, characterized in that, The groove (3231) is spirally distributed along the outer wall of the double cone guide (323), and the spiral direction is consistent with the rotation direction of the motor (3) drive output shaft (31).

5. The high-efficiency anaerobic fermentation equipment for kitchen waste using dynamic mixing technology according to claim 1, characterized in that, The stirring arm (321) includes a connecting part (321a) and an extension part (321b). The connecting part (321a) and the extension part (321b) are in the shape of a 7. The connecting part (321a) is fixedly connected to the outer edge of the disc (32), and the extension part (321b) is close to the inner wall of the fermentation tank (2) on the outer side.

6. The high-efficiency anaerobic fermentation equipment for kitchen waste using dynamic mixing technology according to claim 1, characterized in that, The stirring arms (321) are provided in eight parts, and each stirring arm (321) has the same structure.

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