A new type of stirring paddle structure for a fermentation tank

Abstract

The utility model belongs to the technical field of fermentation tank, concretely relates to a new -type stirring paddle structure of fermentation tank, including stirring subassembly and setting on stirring subassembly supplementary stirring subassembly, stirring subassembly and supplementary stirring subassembly all set up in the fermentation tank, and stirring subassembly includes stirring shaft, link shaft and base, link shaft is detachably connected with stirring shaft, and installs defoaming paddle on link shaft, link shaft is connected with power shaft on the fermentation tank. The utility model discloses through the cooperation of stirring subassembly and supplementary stirring subassembly, can make two groups of swept -back type stirring paddle of stirring subassembly form axial circulation main body flow field, and its swept -back type stirring paddle can produce stable up and down convection, and at the same time, supplementary stirring subassembly is used to the shear inside and the turbulence mixing of the near area of the inner wall of the fermentation tank, thereby the overall mixing flow effect in the fermentation tank is significantly improved, the dissolved oxygen transfer efficiency is effectively improved, and the temperature gradient in the fermentation tank is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of fermentation tank technology, specifically relating to a novel stirring paddle structure for fermentation tanks. Background Technology

[0002] In corn solid-state fermentation, the overload problem of the stirring system caused by high solid content materials (typically >30%) is particularly prominent. When the fermentation tank volume is large, the traditional single-layer straight blade structure has significant limitations: its radial flow field-dominated stirring mode leads to insufficient axial mixing efficiency, material deposition easily forms at the bottom and edge areas of the tank, the maximum measured temperature gradient can reach 8.3℃, and the microbial activity difference rate reaches 42%, seriously affecting the uniformity of metabolites. In order to overcome the shortcomings of the prior art, this utility model proposes a novel stirring blade structure for fermentation tanks. Utility Model Content

[0003] The purpose of this invention is to provide a novel stirring paddle structure for fermenters, which can solve the above-mentioned technical problems.

[0004] The specific technical solution adopted by this utility model is as follows: This utility model provides a novel stirring paddle structure for a fermenter, including a stirring assembly and an auxiliary stirring assembly disposed on the stirring assembly. Both the stirring assembly and the auxiliary stirring assembly are disposed inside the fermenter. The stirring assembly includes a stirring shaft, a connecting shaft, and a base. The connecting shaft is detachably connected to the stirring shaft and is equipped with an antifoaming paddle. The connecting shaft is connected to a power shaft on the fermenter. Two first fixing sleeves and a second fixing sleeve are installed on the stirring shaft. The second fixing sleeve is disposed below the two first fixing sleeves. The lower side of the stirring shaft is mounted on the base, and the base is mounted on the bottom surface inside the fermenter. Two sets of symmetrical swept-back impellers are provided on the outer periphery of the stirring shaft. Each set of swept-back impellers is circumferentially distributed and installed on the outer periphery of the first fixed sleeve. The sweep-back angle of each swept-back impeller blade is set to 55°. Multiple flat turbine blades are arranged on the outer periphery of the stirring shaft and located on the lower side inside the fermenter. The multiple flat turbine blades are evenly distributed and installed on the outer periphery of the second fixed sleeve.

[0005] Preferably, the auxiliary stirring assembly includes two third fixing sleeves and two anchor plates. Two sets of support rods located inside the fermentation tank are provided on the outer periphery of the stirring shaft. The opposite sides of the two sets of support rods are inserted into the plug-in sleeves and fastened together by bolt and nut assemblies. The plug-in sleeves are fixedly arranged on the symmetrical sides of the outer periphery of the third fixing sleeves.

[0006] Preferably, the two anchor plates are symmetrically arranged on the symmetrical side of the stirring shaft and located inside the fermentation tank. The anchor plates are fixedly arranged between two fixing rings, and the two fixing rings are fixedly installed on the free ends of one set of two support rods.

[0007] Preferably, the outer periphery of the stirring shaft is symmetrically provided with a side stirring pusher plate and a turbulence-causing pusher plate located inside the fermentation tank. Each side stirring pusher plate and turbulence-causing pusher plate is provided in pairs, and the two side stirring pusher plates and the two turbulence-causing pusher plates are respectively fixedly installed on opposite sides of the two anchor plates.

[0008] Preferably, the two side-stirring push plates and the two turbulence-disrupting push plates are arranged in a straight line inside the fermenter. The opposite sides of the two side-stirring push plates are provided with inwardly tapered slopes parallel to the axis of the support rod, and the two inwardly tapered slopes correspond to the forward rotation direction of the stirring shaft.

[0009] Preferably, the gap between the opposite sides of the two side-stirring push plates and the two turbulence-causing push plates and the inner wall of the fermenter is set to 15 mm.

[0010] Preferably, the two turbulence-prone push plates are provided with turbulence-prone inclined surfaces that are symmetrical along the axis of the support rod on their opposite sides, and the two turbulence-prone inclined surfaces correspond to the direction of rotation of the stirring shaft.

[0011] The beneficial effects are: This invention, through the coordinated operation of the stirring assembly and the auxiliary stirring assembly, enables the two sets of swept-back stirring blades of the stirring assembly to form an axial circulating main flow field, and the swept-back stirring blades can generate stable vertical convection; at the same time, in conjunction with the auxiliary stirring assembly, it performs shearing and turbulent mixing in the area near the inner wall of the fermenter, thereby significantly improving the overall mixing and flow effect in the fermenter, effectively improving dissolved oxygen transfer efficiency, and reducing the temperature gradient in the fermenter. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of the stirring assembly of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention inside the fermenter; Figure 3 This is a schematic diagram of the exploded distribution structure of the stirring assembly of this utility model; Figure 4 This is a schematic diagram of the auxiliary stirring component of this utility model.

[0013] The attached diagram lists the components represented by each number as follows: 1. Stirring shaft; 2. First fixed sleeve; 21. Swept-back stirring paddle; 3. Second fixed sleeve; 31. Flat turbine paddle; 4. Auxiliary stirring assembly; 41. Third fixed sleeve; 42. Insert sleeve; 43. Support rod; 44. Anchor plate; 44a. Side stirring push plate; 44b. Turbulence push plate; 45. Fixing ring; 5. Base; 6. Connecting shaft; 7. Defoaming paddle. Detailed Implementation

[0014] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0015] like Figure 1-4 As shown, a novel stirring paddle structure for a fermenter includes a stirring assembly and an auxiliary stirring assembly 4 mounted on the stirring assembly. Both the stirring assembly and the auxiliary stirring assembly 4 are located inside the fermenter. The stirring assembly includes a stirring shaft 1, a connecting shaft 6, and a base 5. The connecting shaft 6 is detachably connected to the stirring shaft 1, and a defoaming paddle 7 is mounted on the connecting shaft 6. The connecting shaft 6 is connected to a power shaft on the fermenter. Two first fixing sleeves 2 and a second fixing sleeve 3 are mounted on the stirring shaft 1. The second fixing sleeve 3 is located below the two first fixing sleeves 2. The lower side of the stirring shaft 1 is mounted on the base 5, and the base 5 is mounted on the bottom surface inside the fermenter. Two sets of symmetrical swept-back impellers 21 are provided on the outer periphery of the stirring shaft 1. Each set of swept-back impellers 21 is evenly distributed around the outer periphery of the first fixed sleeve 2, and the sweep angle of the blades of each swept-back impeller 21 is set to 55°. Multiple flat turbine blades 31 located on the lower side of the fermenter are arranged on the outer periphery of the stirring shaft 1. The multiple flat turbine blades 31 are evenly distributed around the outer periphery of the second fixed sleeve 3.

[0016] As an optional implementation, the auxiliary stirring assembly 4 includes two third fixing sleeves 41 and two anchor plates 44. Two sets of support rods 43 located inside the fermentation tank are provided on the outer periphery of the stirring shaft 1. The opposite sides of the two sets of support rods 43 are inserted into the plug-in sleeves 42 and fastened together by bolt and nut assemblies. The plug-in sleeves 42 are fixedly arranged on the symmetrical sides of the outer periphery of the third fixing sleeves 41, which can realize quick plug-in fixing during installation and facilitate subsequent maintenance and replacement operations.

[0017] See attached document Figure 2 and attached Figure 3Two anchor plates 44 are symmetrically arranged on the symmetrical side of the stirring shaft 1 and located inside the fermentation tank. The anchor plates 44 are fixedly arranged between two fixing rings 45, and the two fixing rings 45 are fixedly installed on the free ends of one set of two support rods 43, so that the support rods 43 can effectively support the anchor plates 44 and drive them to rotate synchronously.

[0018] Furthermore, the outer periphery of the stirring shaft 1 is symmetrically provided with a side stirring pusher plate 44a and a turbulence-causing pusher plate 44b located inside the fermentation tank. There are two side stirring pushers plate 44a and two turbulence-causing pushers plate 44b. The two side stirring pushers plate 44a and the two turbulence-causing pushers plate 44b are respectively fixedly installed on opposite sides of the two anchor plates 44. This allows the two anchor plates 44 to rotate synchronously when they rotate, thereby fully turbulenting and mixing the material near the inner wall of the fermentation tank.

[0019] See attached document Figure 4 Two side-stirring push plates 44a and two turbulence-disrupting push plates 44b are arranged in a straight line inside the fermenter. The two side-stirring push plates 44a have inwardly tapered slopes parallel to the axis of the support rod 43 on their opposite sides, and the two inwardly tapered slopes correspond to the forward rotation direction of the stirring shaft 1. This allows the fermentation material near the inner wall of the fermenter to flow towards the center of the stirring shaft 1 when the two side-stirring push plates 44a rotate, thereby improving the overall stirring and mixing effect.

[0020] Furthermore, the gap between the opposite sides of the two side-stirring push plates 44a and the two side-turbulence push plates 44b and the inner wall of the fermentation tank is set to 15mm. This allows the anchor plate 44 to rotate and drive the side-stirring push plates 44a and the side-turbulence push plates 44b to fully move and turbulent the fermentation material around the inner wall of the fermentation tank.

[0021] Furthermore, the opposing sides of the two turbulence-propelling side plates 44b are provided with turbulence-propelling inclined surfaces symmetrical along the axis of the support rod 43, and the two turbulence-propelling inclined surfaces correspond to the forward rotation direction of the stirring shaft 1. In this way, the two turbulence-propelling side plates 44b on the anchor plate 44 can bidirectionally push and turbulent the fermentation material near the inner wall of the fermenter when rotating, thereby significantly improving the mixing effect in the inner wall area of ​​the fermenter.

[0022] With the above structure, the power shaft drives the stirring shaft 1 to rotate via the connecting shaft 6. The two sets of 55° swept-back stirring blades 21 first generate a strong axial circulating flow field, so that the material in the upper part of the fermenter forms a stable vertical convection. At the same time, the flat turbine blade 31 at the bottom generates a radial flow field, pushing the material at the bottom upward. In the auxiliary stirring assembly 4, the anchor blade 44 rotates synchronously with the stirring shaft 1 via the support rod 43, driving the side stirring pusher plate 44a and the turbulence pusher plate 44b to rotate along the tank wall with a 15mm gap. Their inward inclined surfaces push the edge material towards the central area, while the turbulence inclined surfaces generate bidirectional vortices. In this process, the inward inclined surfaces of the side stirring pusher plate 44a and the turbulence inclined surfaces of the turbulence pusher plate 44b work together to form a composite effect of shearing-inward-turbulence on the material near the tank wall. The defoaming blade 7 operates synchronously to control foam generation. The entire system forms a three-dimensional flow field with axial circulation as the main component, radial mixing as the auxiliary component, and edge shearing enhancement, so that the high solid content material is fully mixed, the temperature gradient is reduced, and the dissolved oxygen transfer efficiency is effectively improved.

[0023] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. This application is mainly used to protect mechanical devices. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, are implemented according to conventional methods in the field.

Claims

1. A novel stirring paddle structure for a fermenter, characterized in that: The system includes a stirring assembly and an auxiliary stirring assembly (4) mounted on the stirring assembly. Both the stirring assembly and the auxiliary stirring assembly (4) are mounted inside the fermentation tank. The stirring assembly includes a stirring shaft (1), a connecting shaft (6), and a base (5). The connecting shaft (6) is detachably connected to the stirring shaft (1), and a defoaming paddle (7) is mounted on the connecting shaft (6). The connecting shaft (6) is connected to the power shaft on the fermentation tank. Two first fixing sleeves (2) and a second fixing sleeve (3) are mounted on the stirring shaft (1). The second fixing sleeve (3) is located below the two first fixing sleeves (2). The lower side of the stirring shaft (1) is mounted on the base (5), and the base (5) is mounted on the bottom surface inside the fermentation tank. Two sets of vertically symmetrical swept-back impellers (21) are provided on the outer periphery of the stirring shaft (1). Each set of swept-back impellers (21) is evenly distributed on the outer periphery of the first fixed sleeve (2). The sweep-back angle of each swept-back impeller (21) is set to 55°. Multiple flat turbine blades (31) are arranged on the outer periphery of the stirring shaft (1) and located on the lower side inside the fermentation tank. The multiple flat turbine blades (31) are evenly distributed on the outer periphery of the second fixed sleeve (3).

2. The novel stirring paddle structure for a fermenter according to claim 1, characterized in that: The auxiliary stirring assembly (4) includes two third fixing sleeves (41) and two anchor plates (44). The outer periphery of the stirring shaft (1) is provided with two sets of support rods (43) located in the fermentation tank. The opposite sides of the two sets of support rods (43) are inserted into the plug sleeves (42) and fastened by bolt and nut assemblies. The plug sleeves (42) are fixedly arranged on the symmetrical side of the outer periphery of the third fixing sleeves (41).

3. The novel stirring paddle structure for a fermenter according to claim 2, characterized in that: The two anchor plates (44) are symmetrically arranged on the symmetrical side of the stirring shaft (1) and located inside the fermentation tank. The anchor plates (44) are fixedly arranged between two fixing rings (45), and the two fixing rings (45) are fixedly installed on the free ends of one set of two support rods (43).

4. The novel stirring paddle structure for a fermenter according to claim 3, characterized in that: The outer periphery of the stirring shaft (1) is symmetrically provided with a side stirring pusher plate (44a) and a turbulence pusher plate (44b) located in the fermentation tank. The side stirring pusher plate (44a) and the turbulence pusher plate (44b) are each provided in pairs. The two side stirring pusher plates (44a) and the two turbulence pusher plates (44b) are respectively fixedly installed on the opposite sides of the two anchor plates (44).

5. The novel stirring paddle structure for a fermenter according to claim 4, characterized in that: The two side-stirring push plates (44a) and the two turbulence-causing push plates (44b) are arranged in a straight line in the fermenter. The two side-stirring push plates (44a) are provided with inward inclined surfaces parallel to the axis of the support rod (43) on their opposite sides, and the two inward inclined surfaces correspond to the forward rotation direction of the stirring shaft (1).

6. The novel stirring paddle structure for a fermenter according to claim 5, characterized in that: The gap between the opposite sides of the two side-stirring push plates (44a) and the two turbulence-causing push plates (44b) and the inner wall of the fermenter is set to 15mm.

7. The novel stirring paddle structure for a fermenter according to claim 6, characterized in that: The two turbulence-prone push plates (44b) are provided with turbulence-prone inclined surfaces symmetrical along the axis of the support rod (43) on opposite sides, and the two turbulence-prone inclined surfaces correspond to the forward rotation direction of the stirring shaft (1).

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