Premixing device of reaction kettle

Abstract

The utility model relates to the technical field of premixing devices, and discloses a reaction kettle premixing device which comprises a premixing tank and a premixing assembly. According to the premixing device of the reaction kettle, the main shaft is driven by the servo motor to drive the spiral propelling blade and the eccentric shearing disc to synchronously rotate, forced conveying and multi-stage shearing of materials are achieved, and directional vortex control of the spiral flow guide groove in the annular flow guide cylinder is combined, so that mixing dead angles are effectively eliminated, uniformity is improved, and the mixing effect is improved through the gradient aperture design of the porous baffle plate. The aperture of the outer ring is larger than that of the inner ring, so that material grading and shunting are achieved, negative pressure suction of the Venturi ejector to the U-shaped backflow pipe is matched, the circulation efficiency of high-viscosity / high-solid-content materials is improved, the precipitation rate is reduced, the backflow proportion is adjusted through the flow control valve, top back-mixing dispersion is optimized through the vortex-preventing disperser, and bottom material overturning is strengthened through the auxiliary spiral blades. And in combination with a controller, electrical elements are regulated and controlled in a centralized manner, so that the operation is convenient and fast.

Description

Technical Field

[0001] This application relates to the field of premixing device technology, specifically a reaction vessel premixing device. Background Technology

[0002] In chemical production, reaction vessels are common reaction equipment, and the premixing of materials is an important step before the reaction.

[0003] An existing patent (publication number: CN217189295U) discloses a premixing device for a reactor, relating to the field of reactor technology. It mainly solves the problem that materials tend to clump together during reactor feeding, leading to slow subsequent mixing efficiency. The device includes a container with a motor mounted on its upper side. A stirring rod is fixedly connected to the motor's output shaft. A stirring blade is fixedly connected to the outer side of the lower end of the stirring rod. Feed inlets are located at both ends of the upper side of the container. A first gear is located in the middle of the lower side of the container. A crushing mechanism is located at the upper end of the stirring rod. The crushing mechanism includes a transmission unit, a rotating rod, a support plate, a stirring unit, and a cleaning unit. The transmission unit is located on the outer side of the upper end of the stirring rod, with the rotating rod fixedly connected to its middle end. The lower end of the rotating rod is connected to the support plate, which is fixed to the container on the side closest to it. By setting up the crushing mechanism, the clump material is crushed when it enters the container through the feed inlet, facilitating mixing with other materials during subsequent stirring and improving mixing efficiency.

[0004] The apparatus in the aforementioned comparative document can only perform single stirring and premixing of materials, which can lead to uneven premixing. To solve this problem, a reactor premixing device is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a reactor premixing device that employs a coupled design of dynamic and static mixing, combined with multi-stage layered shearing and reflux, to solve the problems of uneven mixing and poor adaptability in existing technologies.

[0006] To achieve the above objectives, this application provides the following technical solution: a premixing device for a reactor, comprising a premixing tank and a premixing assembly, wherein the premixing assembly includes a servo motor fixedly connected to the top of the premixing tank and a main shaft fixedly connected to the output shaft end of the servo motor, a helical propulsion blade fixedly connected to the top of the main shaft, staggered eccentric shearing disks installed in the middle of the main shaft, and multiple breaking teeth fixedly connected to the outer surface of each eccentric shearing disk, an annular guide tube fixedly connected to the inner top wall of the premixing tank, the helical propulsion blade and the eccentric shearing disks being located inside the annular guide tube, a helical guide groove being formed on the inner wall of the annular guide tube, a perforated baffle plate being installed below the helical guide groove, a Venturi injector being installed at the bottom of the premixing tank, one end of the Venturi injector being connected to a U-shaped return pipe, and the top end of the U-shaped return pipe being installed at the top of the premixing tank.

[0007] The above scheme utilizes a servo motor to drive the main shaft, which in turn drives the spiral propeller blades and the eccentric shear disc to rotate synchronously, achieving forced material conveying and multi-stage shearing. Combined with the directional vortex control of the spiral guide groove inside the annular guide tube, it effectively eliminates mixing dead zones and improves uniformity. The gradient aperture design of the porous baffle plate, with the outer ring aperture larger than the inner ring, enables graded flow of materials. In conjunction with the negative pressure suction of the U-shaped return pipe by the Venturi ejector, it enhances the circulation efficiency of high-viscosity / high-solids-content materials and reduces the sedimentation rate. Therefore, this design, through dynamic-static coupling and synergistic circulation and return, significantly broadens the adaptability of the premixing device to complex materials and improves the uniformity of premixing.

[0008] Furthermore, an auxiliary spiral blade is fixedly connected to the bottom of the main shaft. The auxiliary spiral blade is located inside the annular guide tube. Multiple positioning posts are fixedly connected to the bottom surface of the porous baffle plate. The bottom ends of the multiple positioning posts are fixedly connected to the inner wall of the premix tank.

[0009] The above scheme, with the auxiliary spiral blades, can further eliminate sedimentation, and the positioning column can stably install the porous baffle inside the premix tank.

[0010] Furthermore, the porous baffle plate has several through holes on its surface, and the through holes are radially gradient distributed, with the outer ring hole diameter being larger than the inner ring hole diameter.

[0011] The above scheme limits the location and size of the through holes on the surface of the porous baffle, enabling more precise flow diversion.

[0012] Furthermore, a flow control valve is installed on the section of the U-shaped return pipe, and an anti-vortex disperser is installed at the top of the U-shaped return pipe, the anti-vortex disperser being located inside the annular guide tube.

[0013] The above scheme allows for easy adjustment of the reflux ratio via a flow control valve, which is beneficial for uniform premixing. The anti-vortex disperser prevents reflux material from directly impacting the inner wall of the annular guide tube, ensuring uniform dispersion.

[0014] Furthermore, the top of the premix tank is equipped with a feeding port, the output end of which is connected to the interior of the annular guide tube, and the input end of the feeding port is provided with a sealing plug.

[0015] The above scheme allows for convenient input of premixed raw materials into the annular guide tube via the feeding port, making it more practical.

[0016] Furthermore, a discharge port is installed at the bottom of the premixing tank, the input end of the discharge port is connected to the bottom of the premixing tank, and a solenoid valve is installed on the pipe section of the discharge port.

[0017] The above solution allows the premixed raw materials inside the premix tank to be discharged to the outside via the discharge port and solenoid valve, thus facilitating subsequent processes.

[0018] Furthermore, the bottom of the premix tank is fixedly connected to four support piles, and each support pile is fixedly connected to an anti-slip pad at its bottom end.

[0019] The above solution, with its supporting piles and anti-slip pads, allows the device to be stably placed on the contact surface, thus optimizing the premixing process.

[0020] Furthermore, a controller is fixedly connected to the outer surface of the premix tank, and all electrical components inside the premix assembly are electrically connected to the controller.

[0021] The above solution allows for convenient control of the electrical components in the premixed assembly via a specially designed controller, simplifying the operation process.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This reactor premixing device uses a servo motor to drive the main shaft, which in turn drives the spiral propeller and eccentric shear disk to rotate synchronously, achieving forced material conveying and multi-stage shearing. Combined with the directional vortex control of the spiral guide groove inside the annular guide tube, it effectively eliminates mixing dead zones and improves uniformity. The gradient aperture design of the porous baffle plate, with the outer ring aperture larger than the inner ring, enables graded flow of materials. In conjunction with the negative pressure suction of the U-shaped return pipe by the Venturi ejector, it enhances the circulation efficiency of high-viscosity / high-solids-content materials and reduces the sedimentation rate. The flow control valve adjusts the return ratio, the anti-vortex disperser optimizes the top back-mixing dispersion, and the auxiliary spiral blades enhance the bottom material churning, further ensuring mixing consistency. Combined with the controller for centralized control of electrical components, the operation is convenient and efficient. Therefore, this design, through dynamic-static coupling and synergistic circulation and return, significantly broadens the adaptability of the premixing device to complex materials and improves the uniformity of premixing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall front view of the structure of this application;

[0025] Figure 2 This is a schematic diagram of the overall bottom view of the structure of this application;

[0026] Figure 3 This is a first overall sectional view of the structure of this application;

[0027] Figure 4 This is a second overall sectional view of the structure of this application;

[0028] Figure 5 This is a partial bottom view of the structure of this application.

[0029] In the picture:

[0030] 1. Premixing tank; 2. Premixing assembly; 201. Servo motor; 202. Main shaft; 203. Spiral propeller blade; 204. Eccentric shearing disc; 205. Annular guide tube; 206. Spiral guide groove; 207. Porous baffle plate; 208. Venturi injector; 209. U-shaped return pipe; 210. Flow control valve; 211. Anti-vortex disperser; 212. Auxiliary spiral blade; 213. Positioning column; 3. Feed port; 4. Discharge port; 5. Solenoid valve; 6. Support pile; 7. Anti-slip pad; 8. Controller. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 3 and Figure 4 This embodiment of a reactor premixing device includes a premixing tank 1 and a premixing assembly 2. The premixing assembly 2 includes a servo motor 201 fixedly connected to the top of the premixing tank 1 and a main shaft 202 fixedly connected to the output shaft end of the servo motor 201. When the servo motor 201 is started, it drives the main shaft 202 to rotate. A helical propulsion blade 203 is fixedly connected to the top of the main shaft 202. A staggered eccentric shearing disk 204 is installed in the middle of the main shaft 202. The eccentric parts of the multiple eccentric shearing disks 204 are all fixedly connected to the outer surface of the main shaft 202. Each eccentric shearing disk... Multiple crushing teeth are fixedly connected to the outer surface of the cutting disc 204. These crushing teeth further optimize the multi-stage shearing and crushing effect, thereby improving the uniformity of premixing. When the main shaft 202 rotates, it drives the spiral propeller 203 and the eccentric shear disc 204 to rotate. An annular guide cylinder 205 is fixedly connected to the inner top wall of the premix tank 1. The spiral propeller 203 and the eccentric shear disc 204 are both located inside the annular guide cylinder 205. A spiral guide groove 206 is formed on the inner wall of the annular guide cylinder 205. After the material enters the annular guide cylinder 205... A vortex will form along the spiral guide channel 206, extending the residence time through static mixing. This allows it to work in conjunction with the rotating spiral propeller blades 203 and the eccentric shear disk 204 to achieve dynamic shearing and static vortex coupling, eliminating premixing dead zones and making it more practical. A porous baffle plate 207 is installed below the spiral guide channel 206. The porous baffle plate 207 has several through holes on its surface, with the holes arranged in a radial gradient. The outer ring diameter is larger than the inner ring diameter, limiting the position and size of the through holes on the surface of the porous baffle plate 207, enabling more precise flow separation. The premixing tank 1... A Venturi ejector 208 is installed at the bottom to prevent sedimentation and accumulation. One end of the Venturi ejector 208 is connected to a U-shaped reflux pipe 209. The top end of the U-shaped reflux pipe 209 is installed at the top of the premix tank 1. The U-shaped reflux pipe 209 can achieve the effect of circulation reflux and repeated premixing, which improves the uniformity of premixing. The Venturi ejector 208 is an existing device, and its working principle and internal structure will not be described in detail here. However, it should be understood that when the Venturi ejector 208 is started, it can force the high-density material at the bottom into the U-shaped reflux pipe 209.

[0033] Please see Figure 2 , Figure 4 and Figure 5An auxiliary spiral blade 212 is fixedly connected to the bottom of the main shaft 202. The auxiliary spiral blade 212 is located inside the annular guide tube 205. Multiple positioning posts 213 are fixedly connected to the bottom surface of the porous baffle 207. The bottom ends of the multiple positioning posts 213 are fixedly connected to the inner wall of the premix tank 1. The auxiliary spiral blade 212 can further eliminate sedimentation. The positioning posts 213 can stably install the porous baffle 207 inside the premix tank 1. A flow control valve 210 is installed on the section of the U-shaped return pipe 209. An anti-vortex disperser 211 is installed at the top of the U-shaped return pipe 209. The anti-vortex disperser 211 is located inside the annular guide tube 205. The flow control valve 210 can easily adjust the return ratio, which is beneficial to uniform premixing. The anti-vortex disperser 211 can prevent the return material from directly hitting the inner wall of the annular guide tube 205, ensuring uniform dispersion.

[0034] Please see Figure 1 , Figure 2 and Figure 3 The premixing tank 1 is equipped with a feeding port 3 at its top. The output end of the feeding port 3 is connected to the interior of the annular guide cylinder 205. The input end of the feeding port 3 is equipped with a sealing plug. The feeding port 3 allows for convenient feeding of raw materials to be premixed into the annular guide cylinder 205, making it more practical. The premixing tank 1 is equipped with a discharge port 4 at its bottom. The input end of the discharge port 4 is connected to the bottom of the premixing tank 1. A solenoid valve 5 is installed on the pipe section of the discharge port 4. The discharge port 4 and the solenoid valve 5 allow the premixed raw materials inside the premixing tank 1 to be fed into the annular guide cylinder 205. The material is discharged to the outside to facilitate subsequent processes. The bottom of the premix tank 1 is fixedly connected with four support piles 6, and the bottom of each support pile 6 is fixedly connected with an anti-slip pad 7. The support piles 6 and anti-slip pads 7 can stably place the device on the contact surface, optimizing the premixing process. The outer surface of the premix tank 1 is fixedly connected with a controller 8. The electrical components inside the premix assembly 2 are all electrically connected to the controller 8. The controller 8 can conveniently control the operation of the electrical components in the premix assembly 2, simplifying the operation process.

[0035] It should be noted that the power that enables the material inside the U-shaped return pipe 209 to return from the bottom to the top mainly comes from the synergistic effect of multiple fluid dynamics designs within the device. The rotation of the helical propulsion blade 203 not only transports the material downwards but also creates a local low-pressure zone. This low-pressure zone, through the principle of fluid continuity, attracts the insufficiently mixed material at the bottom to replenish it upwards along the U-shaped return pipe 209, creating a self-suction effect. The rotation of the eccentric shear disk 204 pushes the material outwards. When the material impacts the inner wall of the annular guide tube 205, some of its kinetic energy is converted into pressure energy, propelling the material at the bottom through the U-shaped return pipe. As pipe 209 rises, the spiral guide channel 206 guides the material to form a vortex flow, generating centrifugal force. Under the action of centrifugal force, the denser unmixed material is thrown to the outside and sinks to the bottom, while the lighter mixed material flows upward. This stratification effect creates accumulation at the bottom, forcing some material to return to the top through the U-shaped return pipe 209. The gradient aperture of the porous baffle 207, with larger apertures at the top and smaller apertures at the bottom, forms an asymmetric resistance distribution. When the material passes through the porous baffle 207, the flow velocity increases in the smaller aperture area at the bottom, resulting in a decrease in local pressure, further drawing material from the bottom into the U-shaped return pipe 209.

[0036] In this embodiment, a premixing device for a reactor uses a servo motor 201 to drive the main shaft 202, which in turn drives the spiral propeller 203 and the eccentric shear disk 204 to rotate synchronously, achieving forced conveying and multi-stage shearing of materials. Combined with the directional vortex control of the spiral guide groove 206 inside the annular guide tube 205, it effectively eliminates mixing dead zones and improves uniformity. The gradient aperture design of the porous baffle 207, with the outer ring aperture larger than the inner ring, achieves graded flow of materials. In conjunction with the negative pressure suction of the U-shaped return pipe 209 by the Venturi ejector 208, it enhances the circulation efficiency of high-viscosity / high-solids-content materials and reduces the sedimentation rate. The flow control valve 210 adjusts the return ratio, the anti-vortex disperser 211 optimizes the top back-mixing dispersion, and the auxiliary spiral blades 212 enhance the bottom material churning, further ensuring mixing consistency. Combined with the controller 8 to centrally control electrical components, the operation is convenient and efficient. Therefore, this design, through dynamic-static coupling and circulation return synergy, significantly broadens the adaptability of the premixing device to complex materials and also improves the uniformity of premixing.

[0037] The working principle of the above embodiment is as follows: the servo motor 201 drives the main shaft 202 to rotate, which in turn drives the spiral propeller blade 203 to force the material downward from the feed port 3. The eccentric shearing disk 204 rotates at high speed with the main shaft 202, and its sawtooth structure performs multi-stage crushing of the material, especially for high viscosity or high solid content lumps. After the material enters the annular guide cylinder 205, it forms a directional vortex along the spiral guide groove 206 on the inner wall, extending the mixing path. The fixed structure of the annular guide cylinder 205 and the dynamic shearing shape of the spiral propeller blade 203 and the eccentric shearing disk 204 are combined. The coupling eliminates mixing dead zones. When the material passes through the porous baffle 207, the large holes in the outer ring release large particles, while the small holes in the inner ring finely disperse the material. The Venturi ejector 208 uses the high-speed fluid at the outlet of the annular guide tube 205 to generate negative pressure, and then draws the unmixed material at the bottom to the top through the U-shaped return pipe 209. The anti-vortex disperser 211 ensures uniform return flow, the flow control valve 210 can adjust the return flow ratio, and the auxiliary spiral blades 212 can enhance the bottom churning, thereby achieving a more uniform premixing operation and meeting the premixing requirements of different materials.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reaction kettle premixing device, comprising a premixing tank (1) and a premixing assembly (2), characterized in that: The premixing assembly (2) comprises a servo motor (201) fixedly connected to the top of a premixing tank (1) and a main shaft (202) fixedly connected to the output shaft end of the servo motor (201), the top of the main shaft (202) is fixedly connected with a spiral propelling paddle (203), the middle part of the main shaft (202) is installed with staggered eccentric shearing discs (204), the outer surface of each of the eccentric shearing discs (204) is fixedly connected with a plurality of crushing teeth, the inner top wall of the premixing tank (1) is fixedly connected with an annular flow guide cylinder (205), the spiral propelling paddle (203) and the eccentric shearing discs (204) are located inside the annular flow guide cylinder (205), the inner wall of the annular flow guide cylinder (205) is provided with a spiral flow guide groove (206), the lower part of the spiral flow guide groove (206) is installed with a perforated baffle (207), the bottom of the premixing tank (1) is installed with a Venturi injector (208), one end of the Venturi injector (208) is communicated with a U-shaped return pipe (209), the top end of the U-shaped return pipe (209) is installed on the top of the premixing tank (1).

2. The pre-mixing device for a reaction vessel according to claim 1, characterized in that: The bottom of the main shaft (202) is fixedly connected with an auxiliary spiral blade (212), the auxiliary spiral blade (212) is located inside the annular flow guide cylinder (205), the bottom surface of the perforated baffle (207) is fixedly connected with a plurality of positioning columns (213), the bottom ends of the plurality of positioning columns (213) are fixedly connected with the inner wall of the premixing tank (1).

3. The pre-mixing device for a reaction vessel according to claim 1, wherein: The perforated baffle (207) is provided with a plurality of through holes and the through holes are radially gradient distributed, the outer ring hole diameter is larger than the inner ring hole diameter.

4. The pre-mixing device for a reaction vessel according to claim 1, wherein: The U-shaped return pipe (209) is installed with a flow control valve (210) on the pipe section, the top end of the U-shaped return pipe (209) is installed with an anti-vortex disperser (211), the anti-vortex disperser (211) is located inside the annular flow guide cylinder (205).

5. The pre-mixing device for a reaction vessel of claim 1, wherein: The top of the premixing tank (1) is installed with a feeding port (3), the output end of the feeding port (3) is communicated with the inside of the annular flow guide cylinder (205), the input end of the feeding port (3) is provided with a sealing plug.

6. The pre-mixing device for a reaction vessel according to claim 1, wherein: The bottom of the premixing tank (1) is installed with a discharging port (4), the input end of the discharging port (4) is communicated with the bottom of the premixing tank (1), the pipe section of the discharging port (4) is installed with a solenoid valve (5).

7. The pre-mixing device for a reaction vessel according to claim 1, wherein: The bottom of the premixing tank (1) is fixedly connected with four support piles (6), the bottom end of each of the support piles (6) is fixedly connected with an anti-skid pad (7).

8. The pre-mixing device for a reaction vessel according to claim 1, wherein: The outer surface of the premixing tank (1) is fixedly connected with a controller (8), the electrical elements inside the premixing assembly (2) are electrically connected with the controller (8). The bottom of the premixing tank (1) is fixedly connected with four support piles (6), the bottom end of each of the support piles (6) is fixedly connected with an anti-skid pad (7). The outer surface of the premixing tank (1) is fixedly connected with a controller (8), the electrical elements inside the premixing assembly (2) are electrically connected with the controller (8).

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