Mechanical stirring device for large anaerobic fermenters
By designing a mechanical stirring device for large anaerobic fermenters, the rotation of the shaft is driven by the meshing of B bevel gears and A bevel gears, which solves the problem of fermentation efficiency being affected by the sinking of fermentation material. This achieves uniform mixing of fermentation material and fermentation broth and safe pressure relief, thereby improving fermentation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA HUAMENG KECHUANG ENVIRONMENTAL PROTECTION TECH ENG CO LTD
- Filing Date
- 2025-09-05
- Publication Date
- 2026-08-04
AI Technical Summary
During anaerobic fermentation, uneven mixing of the fermentation material and the fermentation broth causes the fermentation material to settle and solidify, affecting fermentation efficiency.
Design a mechanical stirring device including a stirring mechanism and a pressure relief component. The device uses the meshing of bevel gears B and A to drive the rotation of shafts one and two, which in turn drive the cutting protrusions and blades to stir the fermentation material. The pressure relief component releases the pressure inside the tank to prevent explosion.
This method achieves uniform mixing of the fermentation material and the fermentation broth, improves fermentation efficiency, ensures safety, and avoids the problem of reaction efficiency being affected by sedimentation.
Smart Images
Figure CN224590919U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anaerobic fermentation technology, and in particular to a mechanical stirring device for large-scale anaerobic fermenters. Background Technology
[0002] Anaerobic fermentation refers to a process in which microorganisms convert organic matter into energy and metabolic products through metabolism in an oxygen-deficient environment. Anaerobic fermentation involves various microorganisms, including bacteria and archaea, which decompose complex organic substances such as carbohydrates, fats, and proteins to produce gases such as methane and carbon dioxide, as well as other organic substances such as alcohols and acids. Anaerobic fermentation is widely used in biomass energy production, wastewater treatment, and organic waste management. It can effectively recover energy and reduce environmental pollution. Furthermore, by optimizing fermentation conditions, gas production efficiency and product quality can be improved.
[0003] The applicant has discovered that the existing technology has at least the following technical problems: Anaerobic fermentation mixes the fermentation material with the fermentation liquid and obtains biogas and other reactants through the fermentation reaction between the two substances. However, the fermentation material tends to gradually sink and solidify in the tank, affecting the uniform mixing of the fermentation material and the fermentation liquid. This makes it easy for the fermentation material to be affected by sedimentation, which affects its full reaction with the fermentation liquid and thus affects the fermentation efficiency. Therefore, we propose a mechanical stirring device for large-scale anaerobic fermentation tanks. Utility Model Content
[0004] The purpose of this invention is to provide a mechanical stirring device for large-scale anaerobic digesters, addressing the technical problem in existing technologies where anaerobic fermentation mixes the fermenting material and fermentation broth to produce biogas and other reactants. However, the fermenting material tends to gradually sink and solidify within the digester, affecting the uniform mixing of the fermenting material and broth, and hindering the full reaction between the fermenting material and the broth, thus impacting fermentation efficiency. The preferred technical solutions provided by this invention offer numerous advantages, which are detailed below.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] This utility model provides a mechanical stirring device for large-scale anaerobic fermenters, including a stirring mechanism for stirring the fermenting material and fermentation broth to achieve a more uniform mixture. The stirring mechanism comprises two B-bevel gears and a shaped guide tube. The two B-bevel gears are arranged in a vertical array, one above the other. A-bevel gears are meshed with the left and right sides of both B-bevel gears. A second rotating shaft is located below the B-bevel gears, and a first rotating shaft is sleeved on the outer side of the second rotating shaft. Several cutting protrusions are provided on the outer side of the first rotating shaft. Several blades are arranged on one side of several of the cutting protrusions that are close to each other. The irregularly shaped guide tube is arranged above the B bevel gear. A frustum cover plate is arranged above the irregularly shaped guide tube. A sliding rod is arranged on the top of the frustum cover plate. By setting the square box and the top plate, the meshing between the A bevel gear and the B bevel gear can be protected to prevent dust and other contaminants from falling into the gap of the A bevel gear and getting stuck. The two B bevel gears are on the same vertical reference line, the two A bevel gears are on the same horizontal reference line, and the two B bevel gears are mirror images of each other.
[0007] Furthermore, the stirring mechanism includes a stirring assembly for breaking up the aggregated fermentation material so that it can come into uniform contact with the fermentation liquid, and a pressure relief assembly for venting gases that cause the pressure inside the tank to rise, thus preventing an explosion due to excessive pressure. By setting up the pressure relief assembly, a buffer can be provided for the stirring assembly, preventing excessive internal pressure from causing safety hazards. The pressure relief assembly is located on the top front side of the stirring assembly, and the top of the stirring assembly and the bottom of the pressure relief assembly abut against each other.
[0008] Furthermore, the stirring assembly includes a cylinder with a circular cover on its top outer wall. An air intake pipe is installed on the left side of the front surface of the top outer wall of the circular cover. Inlet and outlet valves are installed at the top and bottom of the front outer wall of the cylinder. Two inlet and outlet valves are arranged vertically in an array around the cylinder. The interiors of the two inlet and outlet valves and the air intake pipe are connected to the interior of the cylinder. A shaped protrusion is installed at the center of the back outer wall of the cylinder, and a climbing ladder is installed behind the shaped protrusion. A three-phase separator is installed at the center of the interior of the cylinder. A square box is installed at the center of the top outer wall of the round cover. By setting an air intake pipe, the biogas produced by fermentation in the cylinder can be discharged to the outside and transported to the gas storage device. By setting an inlet and outlet valve, materials can be introduced into the cylinder or discharged from the cylinder. The materials falling into the three-phase separator will separate into liquid and solid under the action of gravity. The two A bevel gears and the two B bevel gears are all set in the square box. A top plate is installed on the top of the square box. The two A bevel gears are rotatably connected to the inner wall of the square box on the side that is away from each other.
[0009] Furthermore, the top of the B-bevel gear located at the top extends upward through the top plate and is rotatably connected, while the bottom of the B-bevel gear located at the bottom extends downward through the center of the top of the round cover and is rotatably connected. A motor is installed at the center of the top outer wall of the top plate. The center of the bottom output end of the motor is on the same vertical reference line as the center of the top of the B-bevel gear located at the top. The bottom output end of the motor is installed at the center of the top of the B-bevel gear at the top via a coupling. The top of the second rotating shaft is installed on the bottom outer wall of the B-bevel gear at the top. The bottom of the second rotating shaft extends downward and passes through the B bevel gear located at the bottom. The outer wall of the second rotating shaft is rotatably connected to the inner wall of the first rotating shaft. The motor is a YE4-80M1-2 series three-phase asynchronous motor, and the motor is also equipped with a SINAMICS-V20 frequency converter. The top outer wall of the first rotating shaft is mounted on the bottom outer wall of the bottom B bevel gear. Several cutting protrusions are set at the bottom of the first rotating shaft. Several inclined blades are installed on the outer wall of the several cutting protrusions that are close to each other.
[0010] Furthermore, a plurality of the aforementioned cutting protrusions are arranged in a circular array around the first rotating shaft. Each of the cutting protrusions has a star-shaped plate at its top and bottom, and the cutting protrusions are mounted on the outer wall of the star-shaped plate. A support ring is installed at the center of the outer wall of the top of the bottom cutting protrusion. This support ring is rotatably connected to the bottom of the second rotating shaft. By setting the support ring, the bottom area of the second rotating shaft can be limited, keeping the second rotating shaft rotating at the center and preventing it from shaking during rotation, which could cause the blades to collide with the cutting protrusions. The mutual rotation of the first and second rotating shafts ensures that the rotation of the first rotating shaft does not interfere with the rotation of the second rotating shaft, and vice versa. The blades are arranged in groups of six, forming three groups: upper, middle, and lower. These three groups are arranged in a vertical and horizontal array centered on the first rotating shaft. Within each blade assembly, six blades are arranged in a circular array centered on the first rotating shaft. Connectors are located on the sides of the six blades that are close to each other. All six blades are mounted on the outer wall of the connectors. The blades will follow the rotation of the connectors and enter a circular motion, causing the connectors to generate high-speed centrifugal force and throw the material in the center of the tank outward. The connector at the top is mounted on the outer wall of the top of the first rotating shaft, and the two connectors at the bottom are mounted on the outer wall of the bottom of the second rotating shaft.
[0011] Furthermore, the pressure relief assembly includes an outer box, which is located at the center of the front of the outer wall of the top of the cylinder. A vent pipe is installed at the center of the right outer wall of the outer box. A stepped top cover is installed on the top outer wall of the outer box, and a square top cover is installed on the top of the stepped top cover. The outer box and the vent pipe are internally connected. The interiors of the stepped top cover and the square top cover are both hollow. The bottom of the irregularly shaped conduit is internally connected to the cylinder. By setting the connection between the pressure relief assembly and the stirring assembly, the gas in the cylinder can flow into the irregularly shaped conduit and finally be discharged outward through the vent pipe. The stepped top cover is internally connected to the outer box, and the interior of the square top cover is internally connected to the stepped top cover. The irregularly shaped conduit is located at the center of the interior of the outer box, and the bottom outer wall of the irregularly shaped conduit is installed on the inner wall of the outer box.
[0012] Furthermore, an air nozzle is installed at the top of the irregularly shaped conduit, and a frustum-shaped cover plate is positioned directly above the air nozzle. The bottom outer wall of the frustum-shaped cover plate is tightly fitted to the top outer wall of the air nozzle. A limiting ring is provided above the edge of the frustum-shaped cover plate, and the limiting ring is installed on the inner wall of the outer box. The top outer wall of the limiting ring is installed on the bottom outer wall of the slide rod. The top of the slide rod penetrates the bottom outer wall of the tiered top cover and extends upward into the square top cover. The outer wall of the slide rod is slidably connected to the inner wall of the penetrated portion of the tiered top cover. The outer diameter of the bottom of the slide rod is larger than the outer diameter of the top. A disc is installed at the bottom of the slide rod, and a spring is provided to... When compressed, it can be in a compressed state and accumulate pressure. When the pressure disappears, it releases the pressure and rebounds. In this way, the spring rebound can drive the slide rod to move the frustum cover plate downward, so that the frustum cover plate and the air nozzle are re-fitted together. The displacement range of the frustum cover plate in the vertical direction can be limited by setting a limiting ring. The bottom outer wall of the outer box is installed on the top outer wall of the cover. A spring is sleeved on the outside of the slide rod. The bottom of the spring is installed on the top outer wall of the slide rod disc. The top of the spring is installed on the top inner wall of the ladder top cover. The ladder top cover and the slide rod are flexibly connected by the spring.
[0013] The beneficial effects of this utility model are as follows: The mechanical stirring device for large anaerobic fermenters provided by this utility model, by setting a stirring component, specifically by rotating the top B bevel gear, and driven by the meshing connection of the two A bevel gears and the B bevel gear, both the first and second rotating shafts rotate. The first rotating shaft drives the cutting protrusion to rotate, and the first rotating shaft drives the blade to rotate. In this way, the fermentation material at the bottom of the tank can be stirred by the first rotating shaft, causing it to collide with the cutting protrusion and be cut into microparticles. This allows the fermentation material to be mixed more evenly with the fermentation liquid and react, avoiding the fermentation material from being affected by sedimentation and thus ensuring the fermentation efficiency of the fermentation material.
[0014] By setting up a pressure relief component, the biogas produced by fermentation inside the tank will accumulate inside the tank. When the pressure inside the tank is high, the biogas will flow upward into the special-shaped duct and push the truncated cone cover upward, causing the sliding rod to move upward. This creates a gap in the pressure relief component that allows gas to escape. By releasing a certain amount of gas, the pressure inside the tank can be effectively prevented from becoming too high, reducing the risk of explosion and thus ensuring the safety of workers. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the overall rear structure of this utility model;
[0018] Figure 3 This is a schematic cross-sectional view of the cylindrical section of this utility model;
[0019] Figure 4 This is a schematic diagram of the cross-shaped plate structure of this utility model;
[0020] Figure 5 This is a schematic diagram of the segmented protrusion structure of this utility model;
[0021] Figure 6 This is a cross-sectional schematic diagram of the ladder platform top cover of this utility model.
[0022] In the picture:
[0023] 1. Stirring mechanism; 11. Stirring assembly; 111. Cylinder; 1121. Round cover; 1122. Air vent pipe; 1123. Inlet and outlet valves; 113. Three-phase separator; 1141. Square box; 1142. Top plate; 1151. A bevel gear; 1152. B bevel gear; 1153. Motor; 1161. Shaft No. 1; 1162. Shaft No. 2; 1171. Cross-shaped plate ; 1172, Dividing Protrusion; 1173, Support Ring; 1181, Connector; 1182, Blade; 12, Pressure Relief Assembly; 121, Outer Box; 122, Vent Pipe; 1231, Trapezoidal Top Cover; 1232, Square Top Cover; 1241, Irregularly Shaped Conduit; 1242, Air Nozzle; 1251, Frustum Cover Plate; 1252, Limiting Ring; 1253, Slide Rod; 126, Spring. Detailed Implementation
[0024] Please refer to the attached diagram below. Figures 1-6 This document explains the content of this utility model and its differences from existing technologies. The technical solutions (including preferred solutions) of this utility model are further described in detail below through accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of this utility model, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by this utility model can be replaced, or any two or more technical means or features provided by this utility model can be combined to obtain a new technical solution. No technical feature or solution in this embodiment limits the scope of protection of this utility model. The scope of protection of this utility model should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by this utility model.
[0025] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0027] This invention provides a mechanical stirring device for large anaerobic fermenters. Specifically, by rotating the top B bevel gear 1152, driven by the meshing connection of two A bevel gears 1151 and B bevel gear 1152, both the first and second rotating shafts 1161 and 1162 rotate. The first rotating shaft 1161 drives the cutting protrusion 1172 to rotate, which in turn drives the blades 1182 to rotate. This allows the first rotating shaft 1161 to agitate the fermentation material at the bottom of the tank, causing it to impact the cutting protrusion 1172 and be cut into microparticles. This allows the fermentation material to mix more evenly with the fermentation liquid and react more effectively, preventing sedimentation that could hinder its reaction with the fermentation liquid and thus ensuring fermentation efficiency.
[0028] The following is combined with Figures 1-6 The technical solution provided by this utility model will be described in more detail below:
[0029] This utility model provides a mechanical stirring device for a large-scale anaerobic fermenter, including a stirring mechanism 1. The stirring mechanism 1 is used to stir the fermenting material and fermentation broth to make them mix more evenly. The stirring mechanism 1 includes two B-bevel gears 1152 and a shaped guide tube 1241. The two B-bevel gears 1152 are arranged in a vertical array, one above the other. A-bevel gears 1151 are meshed with the left and right sides of the two B-bevel gears 1152. A second rotating shaft 1162 is arranged below the B-bevel gears 1152. A first rotating shaft 1161 is sleeved on the outside of the second rotating shaft 1162. Several cutting protrusions 1172 are arranged on the outside of the first rotating shaft 1161. Several blades 1182 are arranged on the side of the several cutting protrusions 1172 that are close to each other. The shaped guide tube 1241... 1. A frustum cover plate 1251 is provided above the B bevel gear 1152 and the shaped guide tube 1241 is provided above the frustum cover plate 1251. A slide rod 1253 is provided on the top of the frustum cover plate 1251. The two B bevel gears 1152 are on the same vertical reference line and the two A bevel gears 1151 are on the same horizontal reference line. The two B bevel gears 1152 are mirror images of each other. The stirring mechanism 1 includes a stirring component 11, which is used to disperse the aggregated fermentation material so that it can come into uniform contact with the fermentation liquid. A pressure relief component 12 is used to discharge the gas that causes the pressure inside the tank to rise to the outside to avoid explosion due to excessive pressure. The pressure relief component 12 is provided on the top front side of the stirring component 11. The top of the stirring component 11 and the bottom of the pressure relief component 12 abut against each other.
[0030] In some embodiments of this utility model, the stirring assembly 11 includes a cylinder 111. A circular cover 1121 is provided on the top outer wall of the cylinder 111. An air intake pipe 1122 is installed on the left side of the front of the top outer wall of the circular cover 1121. Inlet and outlet valves 1123 are installed at the top and bottom of the front outer wall of the cylinder 111. The two inlet and outlet valves 1123 are arranged vertically in an array around the cylinder 111. The interiors of the two inlet and outlet valves 1123 and the air intake pipe 1122 are connected to the interior of the cylinder 111. A shaped protrusion is installed at the center of the back outer wall of the cylinder 111. A climbing ladder is installed behind the shaped protrusion on the back of the cylinder 111. A three-phase separator 113 is installed at the center of the interior of the cylinder 111. A square box 1141 is installed at the center. Materials falling into the three-phase separator 113 will separate into liquid and solid components under the action of gravity. Two A bevel gears 1151 and two B bevel gears 1152 are all located inside the square box 1141. A top plate 1142 is installed on the top of the square box 1141. The two A bevel gears 1151 are rotatably connected to the inner wall of the square box 1141 on opposite sides. The top of the B bevel gear 1152 at the top extends upward through the top plate 1142 and is rotatably connected. The bottom of the B bevel gear 1152 at the bottom extends downward through the center of the top of the round cover 1121 and is rotatably connected. A motor 1153 is installed at the center of the top outer wall of the top plate 1142. The center of the bottom output end of the motor 1153 is connected to the top plate 1142. The top center of the B bevel gear 1152 is on the same vertical reference line. The bottom output end of the motor 1153 is mounted to the top center of the B bevel gear 1152 via a coupling. The top of the second rotating shaft 1162 is mounted on the bottom outer wall of the B bevel gear 1152. The bottom of the second rotating shaft 1162 extends downward and passes through the B bevel gear 1152 located at the bottom. The outer wall of the second rotating shaft 1162 is rotatably connected to the inner wall of the first rotating shaft 1161. The top outer wall of the first rotating shaft 1161 is mounted on the bottom outer wall of the bottom B bevel gear 1152. Several cutting protrusions 1172 are all set at the bottom of the first rotating shaft 1161. Several inclined blades are installed on the outer wall of the several cutting protrusions 1172 on the side closest to each other. The device comprises a plurality of slicing protrusions 1172 arranged in a circular array around a first rotating shaft 1161. A star-shaped plate 1171 is provided at the top and bottom of each of the slicing protrusions 1172, and the protrusions 1172 are mounted on the outer wall of the star-shaped plate 1171. A support ring 1173 is installed at the center of the top outer wall of the bottom slicing protrusion 1172, and the support ring 1173 is rotatably connected to the bottom of a second rotating shaft 1162. The mutual rotation of the first and second rotating shafts 1161 ensures that the rotation of the first shaft 1161 does not interfere with the rotation of the second shaft 1162, and vice versa. A plurality of blades 1182 are arranged in groups of six, forming three groups of blade assemblies: upper, middle, and lower.The three sets of blade assemblies are arranged in a vertical and horizontal array centered on the first rotating shaft 1161. The six blades 1182 within each blade assembly are arranged in a circular array centered on the first rotating shaft 1161. Connectors 1181 are located on the sides of the six blades 1182 that are close to each other, and all six blades 1182 are mounted on the outer wall of the connectors 1181.
[0031] In some embodiments of this invention described above, rotating the top B bevel gear 1152, driven by the meshing connection between the two A bevel gears 1151 and the B bevel gear 1152, causes both the first rotating shaft 1161 and the second rotating shaft 1162 to rotate. The first rotating shaft 1161 drives the cutting protrusion 1172 to rotate, which in turn drives the blade 1182 to rotate. This allows the first rotating shaft 1161 to agitate the fermented material at the bottom of the tank, causing it to impact the cutting protrusion 1172 and be cut into microparticles, thus allowing the fermented material to... It can mix and react more evenly with the fermentation liquid, avoiding the fermentation material from being affected by sedimentation and thus ensuring the fermentation efficiency of the fermentation material. Several blades 1182 will follow the rotation of the connector 1181 and enter a circular motion, causing the connector 1181 to generate high-speed centrifugal force and throw the material in the center of the tank outward. The connector 1181 at the top is installed on the outer wall of the top of the first rotating shaft 1161, and the two connectors 1181 at the bottom are installed on the outer wall of the bottom of the second rotating shaft 1162.
[0032] In some embodiments of this utility model, the pressure relief assembly 12 includes an outer box 121, which is located at the center of the front of the top outer wall of the cylinder 111. A vent pipe 122 is installed at the center of the right outer wall of the outer box 121. A tiered top cover 1231 is installed on the top outer wall of the outer box 121, and a square top cover 1232 is installed on the top of the tiered top cover 1231. The outer box 121 and the vent pipe 122 are internally connected. The interiors of the tiered top cover 1231 and the square top cover 1232 are both hollow. The interior of the tiered top cover 1231 is connected to the interior of the outer box 121, and the interior of the square top cover 1232 is connected to the tiered top cover 1231. A shaped conduit 1241 is located at the center of the interior of the outer box 121, and the bottom outer wall of the shaped conduit 1241 is installed on the outer box 121. On the inner wall, an air nozzle 1242 is installed on the top of the irregular conduit 1241. A frustum cover plate 1251 is located directly above the air nozzle 1242. The bottom outer wall of the frustum cover plate 1251 is tightly fitted with the top outer wall of the air nozzle 1242. A limiting ring 1252 is provided above the edge of the frustum cover plate 1251. The limiting ring 1252 is installed on the inner wall of the outer box 121. The top outer wall of the limiting ring 1252 is installed on the bottom outer wall of the slide rod 1253. The top of the slide rod 1253 penetrates the bottom outer wall of the ladder top cover 1231 and extends upward into the square top cover 1232. The outer wall of the slide rod 1253 is slidably connected to the inner wall of the ladder top cover 1231 where it is penetrated. The outer diameter of the bottom of the slide rod 1253 is larger than the outer diameter of the top. A disc is installed at the bottom of the slide rod 1253.
[0033] In some embodiments of this utility model, when the pressure inside the tank is high, biogas will flow upward into the shaped conduit 1241 and push the frustum cover 1251 upward, causing the slide rod 1253 to move upward. This creates a gap in the pressure relief assembly 12 for gas to escape. By releasing a certain amount of gas, the pressure inside the tank can be effectively prevented from becoming too high, reducing the risk of explosion and ensuring the safety of workers. The bottom outer wall of the outer box 121 is installed on the top outer wall of the round cover 1121. A spring 126 is sleeved on the outside of the slide rod 1253. The bottom of the spring 126 is installed on the top outer wall of the disc of the slide rod 1253, and the top of the spring 126 is installed on the top inner wall of the ladder top cover 1231. The ladder top cover 1231 and the slide rod 1253 are flexibly connected by the spring 126.
[0034] Example 1:
[0035] The mechanical stirring device for large anaerobic fermenters provided by this utility model first injects fermentation material into the cylinder 111 through the top inlet / outlet valve 1123. This fermentation material falls onto the three-phase separator 113 and is intercepted. Then, the motor 1153 at the top of the square box 1141 is started, causing its bottom output end to drive the top B bevel gear 1152 to rotate. This drives the left and right A bevel gears 1151 through meshing, which in turn drive the bottom B bevel gear 1152 through meshing. This allows the two B bevel gears 1152 to rotate synchronously in opposite directions. When the bottom B bevel gear 1152 rotates, it drives the bottom-mounted first rotating shaft 1161 to rotate, causing the first rotating shaft 1161 to rotate. 161 drives several blades 1182 to rotate via the connector 1181 installed on the outer wall, thus stirring the fermentation material accumulated above the three-phase separator 113, allowing the fermentation material to flow more evenly into the three-phase separator 113 and preventing sludge buildup. The fermented material then passes through the three-phase separator 113 and falls onto the bottom outer wall of the cylinder 111. At this point, the bottom inlet / outlet valve 1123 is activated to inject the fermentation liquid into the bottom area inside the cylinder 111. The first rotating shaft 1161 drives the star-shaped plate 1171 to rotate via the bottom outer wall, and the star-shaped plate 1171 drives several cutting protrusions 1172 to rotate. Meanwhile, the top B bevel gear 1152 rotates along the support via the second rotating shaft 1162 installed at the bottom. Ring 1173 rotates, with the first rotating shaft 1161 and the second rotating shaft 1162 rotating in opposite directions. When the second rotating shaft 1162 rotates, it also drives several blades 1182 to rotate via the connector 1181 installed on its outer wall. The rotation of the blades 1182 generates centrifugal force, causing the fermented material and fermentation liquid in the bottom area of cylinder 111 to flow. Under the action of centrifugal force, they flow towards the inner wall of cylinder 111. The clumps of fermented material come into contact with the cutting protrusions 1172 and are gradually cut into small particles, allowing for more uniform contact between the fermented material and the fermentation liquid. When these two come into contact for a long time, biogas is generated. This biogas accumulates above the three-phase separator 113 and gradually increases in volume. When the pressure inside the cylinder 111 reaches a certain value, the biogas will rush upward into the irregular conduit 1241 and push the truncated cone cover 1251 upward from the gas nozzle 1242, causing the truncated cone cover 1251 to move upward and drive the motor 1153 installed on the top to move upward. This causes the slide rod 1253 to squeeze the spring 126 and insert its top area into the square top cover 1232. This will create a gap between the gas nozzle 1242 and the truncated cone cover 1251, allowing the biogas to flow outward. This outward biogas will move to the right into the vent pipe 122 and eventually be discharged outward. By discharging a certain amount of biogas, the pressure inside the cylinder 111 is relieved, preventing safety accidents such as explosions caused by excessive pressure inside the cylinder 111.
[0036] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0037] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A mechanical stirring device for a large anaerobic fermentation tank, characterized in that, include A stirring mechanism is used to stir the fermenting material and fermentation broth to make them mix more evenly. The stirring mechanism includes two B-bevel gears and a special-shaped conduit. The two B bevel gears are arranged in a vertical array, one above the other. The left and right sides of the two B bevel gears are meshed with A bevel gears. A second rotating shaft is arranged below the B bevel gears. A first rotating shaft is sleeved on the outside of the second rotating shaft. Several cutting protrusions are arranged on the outside of the first rotating shaft. Several blades are arranged on the side of the several cutting protrusions that are close to each other. The irregularly shaped conduit is positioned above the B bevel gear, and a frustum cover plate is positioned above the irregularly shaped conduit. A sliding rod is positioned on the top of the frustum cover plate. The two B bevel gears are located on the same vertical reference line, the two A bevel gears are located on the same horizontal reference line, and the two B bevel gears are mirror images of each other.
2. A mechanical stirring device for a large scale anaerobic fermentation tank according to claim 1, characterized in that, The stirring mechanism includes a stirring component, which is used to break up the aggregated fermentation material so that it can come into uniform contact with the fermentation liquid. A pressure relief assembly is used to discharge gas that causes the pressure inside the tank to rise, so as to prevent an explosion due to excessive pressure. The pressure relief component is located on the top front side of the stirring component, and the top of the stirring component and the bottom of the pressure relief component abut against each other.
3. A mechanical stirring device for a large scale anaerobic fermentation tank according to claim 2, characterized in that, The stirring assembly includes a cylinder with a circular cover on its top outer wall. An air intake pipe is installed on the left side of the front side of the top outer wall of the circular cover. Inlet and outlet valves are installed at the top and bottom of the front outer wall of the cylinder. The two inlet and outlet valves are arranged vertically in an array around the cylinder. The interiors of the two inlet and outlet valves and the air intake pipe are connected to the interior of the cylinder. A shaped protrusion is installed at the center of the back outer wall of the cylinder. A climbing ladder is installed behind the shaped protrusion on the back of the cylinder. A three-phase separator is installed at the center of the interior of the cylinder. A square box is installed at the center of the top outer wall of the circular cover. The material falling into the three-phase separator will separate into liquid and solid under the action of gravity. The two A bevel gears and the two B bevel gears are all set in a square box. A top plate is installed on the top of the square box. The two A bevel gears are rotatably connected to the inner wall of the square box on the side that is away from each other.
4. A mechanical stirring device for a large scale anaerobic fermentation tank according to claim 2, wherein The top of the B bevel gear located at the top extends upward through the top plate and is rotatably connected. The bottom of the B bevel gear located at the bottom extends downward through the center of the top of the round cover and is rotatably connected. A motor is installed at the center of the top outer wall of the top plate. The center of the bottom output end of the motor is on the same vertical reference line as the center of the top of the B bevel gear located at the top. The bottom output end of the motor is installed at the center of the top of the B bevel gear located at the top via a coupling. The top of the second rotating shaft is installed on the bottom outer wall of the top B bevel gear. The bottom of the second rotating shaft extends downward and passes through the bottom B bevel gear located at the bottom. The outer wall of the second rotating shaft is rotatably connected to the inner wall of the first rotating shaft. The top outer wall of the first rotating shaft is mounted on the bottom outer wall of the bottom B bevel gear. Several cutting protrusions are set on the bottom of the first rotating shaft, and several inclined blades are installed on the outer wall of the several cutting protrusions that are close to each other.
5. A mechanical stirring device for a large scale anaerobic fermentation tank according to claim 4, characterized in that, A plurality of the cutting protrusions are arranged in a circular array around the first rotating shaft. The top and bottom of the plurality of cutting protrusions are provided with a cross-shaped plate. The plurality of cutting protrusions are installed on the outer wall of the cross-shaped plate. A support ring is installed at the center of the top outer wall of the bottom cutting protrusion. The support ring is rotatably connected to the bottom of the second rotating shaft. The mutual rotation of the first rotating shaft and the second rotating shaft ensures that the rotation of the first rotating shaft will not interfere with the rotation of the second rotating shaft, and vice versa. The blades are arranged in groups of six, and the blades are arranged in three groups: upper, middle and lower. The three groups of blade assemblies are arranged in a vertical and horizontal array with the first rotating shaft as the center.
6. A mechanical mixing device for a large scale anaerobic fermenter according to claim 5, wherein The six blades in the blade assembly are arranged in a circular array with the first rotating shaft as the center. A connector is provided on the side of the six blades that are close to each other, and all six blades are installed on the outer wall of the connector. Among them, several of the blades will follow the rotation of the connector and enter a circular motion, causing the connector to generate high-speed centrifugal force and throw the material in the center of the tank outward. The connector located at the top is installed on the outer wall of the top of the first rotating shaft, and the two connectors located at the bottom are installed on the outer wall of the bottom of the second rotating shaft.
7. A mechanical stirring device for a large scale anaerobic fermentation tank according to claim 2, wherein The pressure relief assembly includes an outer box, which is located at the center of the front of the outer wall of the top of the cylinder. A vent pipe is installed at the center of the right outer wall of the outer box. A ladder-shaped top cover is installed on the top outer wall of the outer box. A square top cover is installed on the top of the ladder-shaped top cover. The outer box and the vent pipe are internally connected. The interiors of the ladder-shaped top cover and the square top cover are both hollow. The ladder top cover is connected to the interior of the outer box, the interior of the square top cover is connected to the ladder top cover, the irregular-shaped conduit is located at the center of the interior of the outer box, and the bottom outer wall of the irregular-shaped conduit is installed on the inner wall of the outer box.
8. A mechanical stirring device for a large scale anaerobic fermentation tank according to claim 7, characterized in that, An air nozzle is installed at the top of the irregular-shaped conduit. The frustum cover plate is positioned directly above the air nozzle. The bottom outer wall of the frustum cover plate is tightly fitted with the top outer wall of the air nozzle. A limiting ring is provided above the edge of the frustum cover plate. The limiting ring is installed on the inner wall of the outer box. The top outer wall of the limiting ring is installed on the bottom outer wall of the slide rod. The top of the slide rod penetrates the bottom outer wall of the tiered top cover and extends upward into the square top cover. The outer wall of the slide rod is slidably connected to the inner wall of the tiered top cover where it is penetrated. The outer diameter of the bottom of the slide rod is larger than the outer diameter of the top. A disc is installed at the bottom of the slide rod. The bottom outer wall of the outer box is mounted on the top outer wall of the round cover. A spring is sleeved on the outside of the slide rod. The bottom of the spring is mounted on the top outer wall of the slide rod disc. The top of the spring is mounted on the top inner wall of the ladder top cover. The ladder top cover and the slide rod are flexibly connected by the spring.