Straw continuous fermentation gas production device

Abstract

The utility model discloses a straw continuous fermentation gas production device which comprises a cylinder body, a feeding hopper is arranged at the top of the cylinder body, a stirring mechanism is arranged in the cylinder body and comprises a rotating shaft, a stirring paddle is vertically arranged on the rotating shaft, shearing teeth are vertically arranged on the side face of the stirring paddle, and the shearing teeth are arranged on the side face of the stirring paddle. A rotating shaft is arranged in the stirring mechanism, one end of the rotating shaft is connected with a driving mechanism consisting of a speed reducer and a stirring motor, a feeding mechanism is arranged below the stirring mechanism and comprises a roll shaft, a plurality of groups of spiral feeding plates are arranged on the roll shaft, and one end of the roll shaft is connected with a feeding motor. The device is scientific and reasonable in structural design, efficient mixing is achieved through the stirring mechanism, the three-dimensional shearing tooth structure enables the material mixing uniformity to be improved compared with traditional equipment, and the fermentation period is shortened; the filter plates are quickly disassembled and assembled through the clamping blocks and the clamping grooves, the replacement time of a single group of filter plates is short, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of straw fermentation equipment, specifically a straw continuous fermentation gas-producing device. Background Technology

[0002] Straw is an important component of agricultural waste, and strengthening its comprehensive utilization can alleviate resource scarcity and environmental pollution. Research has found that using crop straw as a fermentation raw material to produce biogas is an important pathway for biogas development in my country. Straw-based biogas production has advantages such as high production rate, long supply cycle, low cost, and abundant raw materials. It also plays a significant role in solving agricultural waste, protecting the ecological environment, and developing rural energy. However, current straw fermentation methods involve directly crushing the straw and placing it into the fermentation tank. Existing technology has the following drawbacks: insufficient mixing: traditional stirring paddles only rotate in a plane, resulting in insufficient mixing uniformity; delayed temperature control: natural fermentation heats up slowly, requiring more than 48 hours to start in winter, increasing energy consumption by 30%. This fermentation method is not thorough enough, and the biogas production rate remains insufficient. Therefore, we propose a continuous straw fermentation biogas production device. Utility Model Content

[0003] The purpose of this invention is to provide a continuous straw fermentation and gas production device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a continuous straw fermentation gas-generating device, comprising a cylinder, a feeding hopper at the top of the cylinder, a stirring mechanism inside the cylinder, the stirring mechanism including a rotating shaft, a stirring paddle vertically mounted on the rotating shaft, shearing teeth vertically mounted on the side of the stirring paddle, a drive mechanism consisting of a reducer and a stirring motor connected to one end of the rotating shaft, a feeding mechanism below the stirring mechanism including a roller shaft, multiple sets of spiral feeding plates mounted on the roller shaft, a feeding motor connected to one end of the roller shaft, a detachable filter plate below the feeding mechanism, a side opening of the cylinder communicating with a fermentation tank via a discharge pipe, a discharge pipe on the side of the fermentation tank, a protective sleeve outside the fermentation tank, a spiral heat-insulating pipe inside the protective sleeve, the two ends of the spiral heat-insulating pipe connected via a circulation pipe, and a circulation pump installed on the circulation pipe.

[0005] In the above scheme, the feeding hopper is provided with a plug-in plug cover.

[0006] In the above scheme, a base is provided below the cylinder.

[0007] In the above scheme, a side door is hinged to the side of the cylinder, and a waterproof ring is provided on the edge of the side door.

[0008] In the above scheme, the filter plate is provided with a locking block on its side, and the locking block is movably engaged in a locking groove opened in the inner wall of the cylinder.

[0009] In the above scheme, both the discharge pipe and the circulation pipe are equipped with solenoid valves.

[0010] In the above solution, a temperature sensor is installed inside the protective sleeve.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This continuous straw fermentation gas-producing device has a simple and reasonable structural design and strong practicality. It achieves efficient mixing through a stirring mechanism: the three-dimensional shearing tooth structure improves the uniformity of material mixing compared to traditional equipment and shortens the fermentation cycle; it achieves convenient maintenance through detachable filter plates: the filter plates can be quickly disassembled and assembled through clips and slots, the replacement time of a single set of filter plates is short, and the maintenance efficiency is improved; it improves the gas production rate through an intelligent temperature control system: closed-loop temperature control stabilizes the fermentation temperature, increases the gas production rate, and increases the gas production per ton of straw; it achieves large-scale production through a continuous feeding mechanism: the spiral feeding plate continuously transports materials, improving the production capacity and efficiency compared to intermittent production. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This utility model Figure 1 Schematic diagram of the structure at point A in the middle.

[0014] Figure 3 This is a schematic diagram of the cylindrical structure of this utility model.

[0015] In the diagram: 1. Cylinder; 11. Feed hopper; 12. Plug; 13. Base; 14. Side door; 15. Rotating shaft; 16. Stirring paddle; 17. Shearing teeth; 18. Reducer; 19. Stirring motor; 2. Roller shaft; 21. Spiral feeding plate; 22. Feeding motor; 23. Filter plate; 24. Clamping block; 25. Clamping groove; 26. Discharge pipe; 27. Fermentation tank; 28. Discharge pipe; 29. ​​Protective sleeve; 3. Spiral insulation pipe; 31. Circulation pipe; 32. Circulation pump; 33. Temperature sensor. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: a continuous fermentation and gas generation device for straw, including a cylinder 1, a feeding hopper 11 at the top of the cylinder 1, a stirring mechanism inside the cylinder 1, the stirring mechanism including a rotating shaft 15, a stirring paddle 16 vertically mounted on the rotating shaft 15, shearing teeth 17 vertically mounted on the side of the stirring paddle 16, a drive mechanism consisting of a reducer 18 and a stirring motor 19 connected to one end of the rotating shaft 15, and a feeding mechanism below the stirring mechanism, the feeding mechanism including a roller 2, etc. The roller shaft 2 is provided with multiple sets of spiral feeding plates 21. One end of the roller shaft 2 is connected to a feeding motor 22. A detachable filter plate 23 is provided below the feeding mechanism. The side opening of the cylinder 1 is connected to the fermentation tank 27 through the discharge pipe 26. The side of the fermentation tank 27 is provided with a discharge pipe 28. The outside of the fermentation tank 27 is provided with a protective sleeve 29. The inside of the protective sleeve 29 is provided with a spiral heat-insulating pipe 3. The two ends of the spiral heat-insulating pipe 3 are connected through a circulation pipe 31, and a circulation pump 32 is installed on the circulation pipe 31.

[0018] The cylinder 1 is welded from pressure vessel steel, with a thickness of 8mm and a pressure resistance of ≥1.6MPa. The agitator 16 has a diameter of 500mm, and the shearing teeth 17 are 50mm high, made of 316L stainless steel with a tooth spacing of 20mm, forming a three-dimensional shear flow field. The reducer 18 is a hardened gear reducer with a speed ratio of 1:30 and a transmission efficiency of ≥95%. The feeding mechanism's spiral feeder 21 has a screw pitch of 180mm, a conveying capacity of 5-15t / h, and a feeding motor 22 with a power of 7.5kW and a speed of 1450r / min. The filter plate 23 has a screen hole diameter of 8mm and a filtration area of ​​2m². 2 The spiral insulation pipe 3 is made of copper-nickel alloy with a wall thickness of 2mm. The circulating pump 32 has a flow rate of 10L / min, a head of 30m, and a temperature control accuracy of ±0.5℃.

[0019] Through the coordinated design of the mixing and feeding mechanisms, continuous mixing, conveying and fermentation of straw materials are achieved, increasing production capacity by 40%.

[0020] High-efficiency mixing: The shearing teeth 17 and the stirring paddle 16 are arranged perpendicularly to form a three-dimensional shear flow field, which improves the mixing uniformity by 15% compared with traditional stirring.

[0021] Intelligent temperature control: The spiral insulation tube 3 and the circulating pump 32 form a closed-loop temperature control system, which has a small temperature fluctuation range and improves fermentation efficiency by 25%.

[0022] In the above scheme, a plug-in end cap 12 is provided inside the feeding hopper 11. The end cap 12 is made of silicone and has an insertion depth of 50mm with the feeding hopper 11 to form a sealed structure. A handle is provided on the top of the end cap 12 for easy manual insertion and removal, preventing odor leakage and the entry of debris.

[0023] In the above scheme, a base 13 is provided below the cylinder 1. Excess water can be filtered by the filter plate 23 and discharged into the inner cavity of the base 13 for collection, and a discharge port is provided on the side of the base 13.

[0024] In the above scheme, a side door 14 is hinged to the side of the cylinder 1, and a waterproof ring is provided on the edge of the side door 14. The side door 14 is formed by bending a 3mm thick stainless steel plate, and the waterproof ring is a EPDM rubber strip with a compression of 2mm to ensure IP67 protection level and prevent liquid leakage.

[0025] In the above scheme, a locking block 24 is provided on the side of the filter plate 23, and the locking block 24 is correspondingly and movably engaged in the locking groove 25 opened in the inner wall of the cylinder 1. The locking block 24 and the locking groove 25 adopt a clearance fit with a locking depth of 8mm to ensure the installation accuracy of the filter plate 23.

[0026] In the above scheme, both the discharge pipe 28 and the circulation pipe 31 are equipped with solenoid valves. The solenoid valves are made of brass. The solenoid valve on the discharge pipe 28 controls the discharge of solid residue, and the solenoid valve on the circulation pipe 31 regulates the hot water flow rate. These valves are linked with the temperature sensor 33 to achieve automated control.

[0027] In the above scheme, a temperature sensor 33 is installed inside the protective sleeve 29. The temperature sensor 33 is a Pt100 platinum resistance thermometer with an accuracy of ±0.1℃, installed in the middle of the fermentation tank 27 to monitor the fermentation temperature in real time. The sensor is electrically connected to the circulating pump 32 and communicates with the PLC via an RS485 bus to achieve closed-loop temperature control.

[0028] Working principle:

[0029] This continuous straw fermentation and gas production device feeds material into the cylinder 1 via a feeding hopper 11. A stirring motor 19 drives a stirring paddle 16 to rotate, and shearing teeth 17 crush the straw and thoroughly mix it with inoculants and water. A feeding motor 22 drives a spiral feeding plate 21 to push the material to the end opening of the cylinder 1. The mixture enters the fermentation tank 27 through a discharge pipe 26, and solid residue is discharged through a discharge pipe 28. A temperature sensor 33 monitors the temperature of the fermentation tank 27 in real time, and a circulating pump 32 adjusts the flow rate of hot water in the spiral insulation pipe 3 to maintain the optimal fermentation temperature. A detachable filter plate 23 can be quickly disassembled and assembled via a locking block 24 and a locking groove 25, facilitating cleaning and maintenance. In continuous production mode, the production capacity is increased compared to intermittent production, and the gas production per ton of straw increases.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A straw continuous fermentation gas production device, comprising a cylinder (1), characterized in that: The top of the barrel (1) is provided with a feeding hopper (11), the barrel (1) is provided with a stirring mechanism, the stirring mechanism comprises a rotating shaft (15), a stirring paddle (16) is vertically arranged on the rotating shaft (15), shear teeth (17) are vertically arranged on the side of the stirring paddle (16), a driving mechanism composed of a speed reducer (18) and a stirring motor (19) is connected to one end of the rotating shaft (15), a feeding mechanism is arranged below the stirring mechanism, the feeding mechanism comprises a roller shaft (2), a plurality of groups of spiral feeding plates (21) are arranged on the roller shaft (2), a feeding motor (22) is connected to one end of the roller shaft (2), a detachable filter plate (23) is arranged below the feeding mechanism, the side opening of the barrel (1) is communicated with a fermentation tank (27) through a discharge pipe (26), a discharge pipe (28) is arranged on the side of the fermentation tank (27), a protective sleeve (29) is arranged outside the fermentation tank (27), a spiral heat preservation pipe (3) is arranged inside the protective sleeve (29), the two ends of the spiral heat preservation pipe (3) are connected through circulation pipes (31), and a circulation pump (32) is installed on the circulation pipes (31).

2. The device for continuous fermentation of straw according to claim 1, characterized in that: The feeding hopper (11) is provided with a plug cover (12) in plug-in cooperation.

3. The device according to claim 1, wherein the device is characterized by: The bottom of the barrel (1) is provided with a base (13).

4. The device according to claim 1, wherein the device is characterized by: The side of the barrel (1) is hinged with a side door (14), and the edge of the side door (14) is provided with a waterproof ring.

5. The device according to claim 1, wherein the device is characterized by: The side of the filter plate (23) is provided with a clamping block (24), and the clamping block (24) is correspondingly movably clamped in the clamping groove (25) formed in the inner wall of the barrel (1).

6. The device according to claim 1, wherein the device is characterized by: The discharge pipe (28) and the circulation pipe (31) are both provided with electromagnetic valves.

7. The device according to claim 1, wherein the device is characterized by: The protective sleeve (29) is provided with a temperature sensor (33).

Images