A rapid mixing and uniformity central reflux device

Abstract

The utility model provides a kind of center reflux device of quick mixing, including cylinder, reflux pipe sealing mechanism and center reflux device, cylinder has feed inlet discharge port, reflux pipe sealing mechanism is sealingly connected at feed inlet, and reflux pipe sealing mechanism has feeding opening and blanking pipeline, center reflux device includes connector, bottom reflux mechanism and at least one internal reflux mechanism, bottom reflux mechanism, internal reflux mechanism all include mixing pipeline and nozzle, the mixing pipeline of bottom reflux mechanism is connected at the discharge port of cylinder, the top end of each mixing pipeline is also all provided with the reflux hole of the communication cylinder interior and mixing pipeline interior. Such adopt to set up multistage reflux mechanism to realize the layered multi-position material taking in kettle, and multistage series work and fast mixing to improve stirring efficiency, help to solve the drawbacks that traditional reaction kettle cannot be large-scale, with the advantages of low energy consumption, fast grading shear mixing, and simple structure, easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel stirring and mixing technology, and in particular to a central reflux device for rapid mixing. Background Technology

[0002] Typically, the process of synthesizing lithium battery precursors mostly uses conventional stirred reactors. During the stirring of lithium battery precursors, because the stirring direction is always in one direction, inertial circular motion occurs between the materials, resulting in low stirring efficiency of lithium battery precursors, which affects the operation and processing quality of the entire lithium battery precursor processing production line.

[0003] In existing technologies, mechanically stirred reactors are generally used to accelerate the reaction process. However, in coprecipitation reaction production, the large velocity gradient of the stirrer along the radius of the reactor affects grain growth, limiting the scale of production and preventing conventional mechanically stirred reactors from being scaled up. Furthermore, the stirring efficiency is low, making it difficult to accurately control the temperature and pH inside the reactor. In addition, conventional reactors have problems such as high operating noise and oil leakage from the reducer.

[0004] Therefore, it is necessary to propose a rapid mixing center reflux device to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main objective of this invention is to provide a rapid mixing center reflux device to solve the problems of limited production scale and low stirring efficiency caused by the inability to scale up existing reactors.

[0006] To achieve the above objectives, this utility model provides a rapid mixing center reflux device, comprising a cylinder, a reflux pipe sealing mechanism, and a center reflux device; wherein,

[0007] The cylinder has a feed inlet at the top and a discharge outlet at the bottom. The reflux pipe sealing mechanism is sealed and connected to the feed inlet of the cylinder. The reflux pipe sealing mechanism has a feed port and a discharge pipe. The feed port and the discharge pipe are connected in communication.

[0008] The central reflux device includes a connecting pipe, a bottom reflux mechanism, and at least one internal reflux mechanism. Both the bottom reflux mechanism and the internal reflux mechanism include a mixing pipe and a nozzle, with the nozzles both built into the top of the mixing pipe.

[0009] The mixing pipe of the bottom reflux mechanism is connected to the discharge port of the cylinder, and the top end of the mixing pipe of the bottom reflux mechanism extends into the cylinder. The two ends of the connecting pipe are respectively connected to the discharge pipe and the mixing pipe of the bottom reflux mechanism. The mixing pipe of the internal reflux mechanism is connected to the connecting pipe and its interior is connected to the interior of the connecting pipe. Each mixing pipe also has a reflux hole at its top end that connects the interior of the cylinder and the interior of the mixing pipe.

[0010] Preferably, each of the mixing pipes includes an inhalation chamber, a mixing chamber, and a diffusion chamber arranged sequentially from top to bottom, the nozzle is built into the inhalation chamber, and the return hole is arranged in communication with the inhalation chamber.

[0011] Preferably, the cross-sectional dimensions of the nozzle are set to gradually decrease vertically downwards.

[0012] Preferably, the mixing chamber has a conical cross-section, and the bottom dimension of the mixing chamber is smaller than the top dimension.

[0013] Preferably, there are two internal reflux mechanisms, which are arranged vertically at intervals.

[0014] Preferably, each of the internal reflux mechanisms has bolt holes at its top and bottom, and a connecting flange is provided on the connecting pipe at the corresponding position of the internal reflux mechanism. The mixing pipe of the internal reflux mechanism is connected to the connecting pipe by bolts passing through the connecting flange and extending into the bolt holes.

[0015] Preferably, a flange seat is provided at the discharge port of the cylinder, and a bottom flange is formed by the middle part of the mixing pipe of the bottom reflux mechanism protruding outward along its own radial direction. The mixing pipe of the bottom reflux mechanism is connected to the discharge port of the cylinder by bolts passing through the bottom flange and extending into the flange seat.

[0016] Preferably, it also includes a sealing ring, wherein an annular groove is provided on the outer side wall of the bottom end of the discharge pipe, and the sealing ring is connected in the annular groove and abuts against the inner side wall of the connecting pipe.

[0017] Preferably, the number of reflux holes at the suction chamber of each mixing pipe is four, and the four reflux holes are arranged at intervals along the circumference of the mixing pipe.

[0018] Preferably, the reflux hole is a square hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This utility model provides a rapid mixing center reflux device, including a cylinder, a reflux pipe sealing mechanism, and a center reflux device. The cylinder has a feed inlet at the top and a discharge outlet at the bottom. The reflux pipe sealing mechanism is sealed and connected to the feed inlet of the cylinder, and has a feeding port and a discharge pipe. The feeding port is connected to the discharge pipe. The center reflux device includes a connecting pipe, a bottom reflux mechanism, and at least one internal reflux mechanism. Both the bottom reflux mechanism and the internal reflux mechanism include a mixing pipe and a nozzle. The nozzles are built into the top of the mixing pipe. The mixing pipe of the bottom reflux mechanism is connected to the discharge outlet of the cylinder, and the top of the mixing pipe of the bottom reflux mechanism extends into the cylinder. The two ends of the connecting pipe are connected to the discharge pipe and the mixing pipe of the bottom reflux mechanism, respectively. The mixing pipe of the internal reflux mechanism is connected to the connecting pipe and its interior is connected to the inside of the connecting pipe. Each mixing pipe also has a reflux hole at its top that connects the interior of the cylinder and the interior of the mixing pipe. By setting up a multi-stage reflux mechanism to achieve multi-stage material intake within the vessel, and by having multiple stages work in series and mix quickly, the stirring efficiency is improved. This helps to solve the drawback of traditional reactors not being able to be scaled up. It has the advantages of low energy consumption, rapid staged shearing and mixing, and is simple in structure and easy to maintain. Attached Figure Description

[0021] 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 the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional schematic diagram of the overall structure in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0024] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle;

[0025] Figure 4 for Figure 1 A magnified view of a portion of point C in the middle;

[0026] Figure 5 This is a perspective view of the internal reflux mechanism in one embodiment of the present invention;

[0027] Figure 6 This is a perspective view of the bottom reflux mechanism in one embodiment of the present invention.

[0028] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0029] Explanation of icon numbers:

[0030] 10. Cylinder; 110. Flange seat; 20. Return pipe sealing mechanism; 210. Feed port; 220. Discharge pipe; 230. Sealing ring; 30. Central return device; 310. Connecting pipe; 311. Connecting flange; 320. Bottom return mechanism; 321. Bottom flange; 330. Internal return mechanism; 340. Mixing pipe; 341. Return hole; 342. Suction chamber; 343. Mixing chamber; 344. Diffusion chamber; 350. Nozzle. Detailed Implementation

[0031] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0032] 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.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0035] Please see the appendix Figure 1-6 The present invention provides a rapid mixing center reflux device 30, comprising a cylinder 10, a reflux pipe sealing mechanism 20, and a center reflux device 30, the specific details of which are as follows:

[0036] The cylinder 10 has a feed inlet at the top and a discharge outlet at the bottom. The reflux pipe sealing mechanism 20 is sealed to the feed inlet of the cylinder 10, and the reflux pipe sealing mechanism 20 has a feed port 210 and a discharge pipe 220. The feed port 210 is connected to the discharge pipe 220. The central reflux device 30 includes a pipe 310, a bottom reflux mechanism 320, and at least one internal reflux mechanism 330. The bottom reflux mechanism 320 and the internal reflux mechanism 330 both include a mixing pipe 340 and a nozzle 350. The nozzle 350 is built into the top of the mixing pipe 340. The mixing pipe 340 of the bottom reflux mechanism 320 is connected to the discharge port of the cylinder 10, and the top end of the mixing pipe 340 of the bottom reflux mechanism 320 extends into the cylinder 10. The two ends of the connecting pipe 310 are respectively connected to the discharge pipe 220 and the mixing pipe 340 of the bottom reflux mechanism 320. The mixing pipe 340 of the internal reflux mechanism 330 is connected to the connecting pipe 310 and its interior is connected to the interior of the connecting pipe 310. Each mixing pipe 340 also has a reflux hole 341 at its top end that connects the interior of the cylinder 10 and the interior of the mixing pipe 340.

[0037] Specifically, the rapid mixing central reflux device 30 in this application includes a cylinder 10, a reflux pipe sealing mechanism 20, and a central reflux device 30. The cylinder 10 is the reactor body, which has an inlet and an outlet. The inlet is used to receive materials, and the outlet is used to discharge the mixture produced after the materials in the cylinder 10 are mixed, or to allow the materials to reflux out. The reflux pipe sealing mechanism 20 provides structural support for the central reflux device 30 and is used to improve the sealing of the inlet of the cylinder 10 to prevent materials from flowing back out from the gap in the inlet. It has a feed port 210 and a discharge pipe 220. The feed port 210 can replace the feed port of the cylinder 10 for feeding, and the received materials fall downward from the discharge pipe 220. The central reflux device 30 is used to mix and react the received materials with the materials in the cylinder 10 to improve the mixing effect.

[0038] The central reflux device 30 includes a connecting pipe 310, a bottom reflux mechanism 320, and at least one internal reflux mechanism 330. The connecting pipe 310 is used to connect the inlet and outlet of the entire cylinder 10. The bottom reflux mechanism 320 and the internal reflux mechanism 330 form a multi-stage mixed structure. The difference is that the bottom reflux mechanism 320 is located at the outlet of the cylinder 10, while the internal reflux mechanism 330 is located inside the cylinder 10 and is located on the connecting pipe 310. The main difference between the two is their location. Although the placement differs, their internal structures are consistent. Therefore, both the bottom reflux mechanism 320 and the internal reflux mechanism 330 include a mixing pipe 340 and a nozzle 350. The nozzle 350 is used to spray material into the mixing pipe 340, allowing the material in the cylinder 10 to mix and react within the mixing pipe 340, which serves as the main reaction space. Therefore, it is understood that a reflux hole 341 needs to be opened at the top of the mixing pipe 340 to allow material from the cylinder 10 to enter the mixing pipe 340. In this application... The return hole 341 can be a square hole, which has a wide and long cross-section, suitable for material inflow and increasing material return flow. Each mixing pipe 340 has four return holes 341, spaced apart circumferentially along the mixing pipe 340. The specific number can be selected by those skilled in the art according to actual needs. During operation, a circulation pump is installed at the outlet of the cylinder 10. The negative pressure suction from the circulation pump acts on the outlet of the cylinder 10 (bottom end of the connecting pipe 310), causing the material inside the connecting pipe 310 to be subjected to negative pressure. Driven by pressure, the material enters the mixing tube through the nozzle 350. According to Bernoulli's principle of fluid flow, as the material flow rate increases, the pressure decreases. The lower pressure acts on the suction chamber 342 of the mixing pipe 340 outside the nozzle 350, drawing the material in the cylinder 10 (reactor) through the return hole 341 on the outside of the mixing pipe 340. In the mixing pipe 340, the material flowing in from the pipe 310 and the material drawn from the cylinder 10 are rapidly sheared and mixed before being discharged. Under this multi-stage action, the multi-stage superimposed mixing effect is achieved, ultimately resulting in a significant improvement in the mixing effect.

[0039] Preferably, the number of internal reflux mechanisms 330 in this application can be set to two, and the two internal reflux mechanisms 330 are arranged vertically at intervals, so as to form a three-stage reflux mixing with the bottom reflux mechanism 320. In other embodiments, the number of internal reflux mechanisms 330 can also be changed. Specifically, the height and number can be adjusted according to the liquid level, flow field distribution, and mixing effect in the cylinder 10 (reactor) to perform layered material taking, shearing and mixing in the reactor.

[0040] In a preferred embodiment of the present invention, each of the mixing pipes 340 includes an intake chamber 342, a mixing chamber 343 and a diffusion chamber 344 arranged sequentially from top to bottom. The nozzle 350 is built into the intake chamber 342, and the return hole 341 is connected to the intake chamber 342.

[0041] It should be noted that the mixing pipe 340 is mainly divided into three parts to achieve different functions. It includes a suction chamber 342, a mixing chamber 343, and a diffusion chamber 344 connected from top to bottom. The suction chamber 342 serves as the inlet for the material in the cylinder 10 to be drawn into the suction chamber 342 through the return hole 341. Therefore, the return hole 341 is connected to the suction chamber 342. The nozzle 350 is also built into the suction chamber 342 so that the material falling from the pipe 310 can flow into the mixing chamber 343 at an accelerated speed through the nozzle 350. The mixing chamber 343 is used for mixing the material falling from the pipe 310 and the material drawn into the cylinder 10 through the return hole 341. The diffusion chamber 344 is used for further mixing before the material is discharged downwards.

[0042] In a preferred embodiment of the present invention, the cross-sectional dimensions of the nozzle 350 are set to gradually decrease vertically downwards.

[0043] It should be noted that reducing the cross-sectional dimension of the nozzle 350 along the material discharge direction (vertically downward) can increase the material flow rate, thereby accelerating material flow and improving reaction efficiency. The principle is well known to those skilled in the art, so it will not be described in detail here.

[0044] In a preferred embodiment of the present invention, the mixing chamber 343 has a conical cross-section, and the bottom dimension of the mixing chamber 343 is smaller than the top dimension.

[0045] It is worth noting that the cone-shaped structure forms a shape that is wider at the top and narrower at the bottom, so that the upper width can be matched with the width of the suction chamber 342. Since the cross-section of the nozzle 350 gradually decreases, there is a gap between the inclined wall of the nozzle 350 and the inner wall of the suction chamber 342. This gap allows the material sucked in by the return hole 341 to flow and fall into the mixing chamber 343. The top of the cone-shaped mixing chamber 343 is the same width as the suction chamber 342 to facilitate the intake of the material sucked in through the return hole 341. Correspondingly, the diffusion chamber 344 is cylindrical and matches the bottom of the cone-shaped mixing chamber 343.

[0046] Furthermore, each of the internal reflux mechanisms 330 has bolt holes at its top and bottom ends in the mixing pipe 340. The connecting pipe 310 is provided with a connecting flange 311 at the corresponding position of the internal reflux mechanism 330. The mixing pipe 340 of the internal reflux mechanism 330 is connected to the connecting pipe 310 by bolts passing through the connecting flange 311 and extending into the bolt holes.

[0047] It should be noted that each of the mixing pipes 340 can be connected to the pipe 310 by means of flange bolts. After pre-setting the number of internal return mechanisms 330, connecting flanges 311 are pre-processed at the corresponding positions of each internal return mechanism 330 on the pipe 310, with one connecting flange 311 at the top and one at the bottom of the position, to correspond to the top and bottom ends of the mixing pipe 340 connected to the internal return mechanism 330. So that after the alignment is correct during installation, bolts are passed through the connecting flanges 311 and inserted into the bolt holes for connection. After connection, the internal channel of the mixing pipe 340 is connected to the internal channel of the pipe 310. This flange connection method is convenient for installation and also convenient for later replacement and maintenance.

[0048] Furthermore, a flange seat 110 is provided at the discharge port of the cylinder 10, and a bottom flange 321 is formed by the mixing pipe 340 of the bottom reflux mechanism 320 protruding outward along its own radial direction in the middle. The mixing pipe of the bottom reflux mechanism 320 is bolted through the bottom flange 321 and extends into the flange seat 110 to be connected to the discharge port of the cylinder 10.

[0049] It should be understood that the mixing pipe 340 of the bottom reflux mechanism 320 can also be connected by flange bolts. Specifically, a flange seat 110 is provided at the discharge port of the cylinder 10 for the bottom flange 321 of the bottom reflux mechanism 320 to be connected, thereby facilitating installation and subsequent maintenance and replacement. It is worth noting that, in addition to the bottom flange 321 protruding in the middle of the mixing pipe 340 of the bottom reflux mechanism 320, another bottom flange 321 can also be protruding at the bottom end of the mixing pipe 340 of the bottom reflux mechanism 320 to facilitate connection with the circulation pump.

[0050] Furthermore, it also includes a sealing ring 230. The bottom outer wall of the discharge pipe 220 is provided with an annular groove, and the sealing ring 230 is connected in the annular groove and abuts against the inner wall of the connecting pipe 310.

[0051] It should be noted that the annular groove is used for the installation of the sealing ring 230. Since the material discharge pipe 220 is inserted and connected to the connecting pipe 310, the sealing ring 230 abuts against the inner wall of the connecting pipe 310, thereby improving the sealing effect through the characteristics of the sealing ring 230, preventing the material from flowing out in reverse, and ensuring that the material always flows out downwards; the sealing ring 230 can be a rubber ring.

[0052] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rapid mixing center reflux device, characterized in that, Includes a cylinder, a reflux pipe sealing mechanism, and a central reflux device; among which, The cylinder has a feed inlet at the top and a discharge outlet at the bottom. The reflux pipe sealing mechanism is sealed and connected to the feed inlet of the cylinder. The reflux pipe sealing mechanism has a feed port and a discharge pipe. The feed port and the discharge pipe are connected in communication. The central reflux device includes a connecting pipe, a bottom reflux mechanism, and at least one internal reflux mechanism. Both the bottom reflux mechanism and the internal reflux mechanism include a mixing pipe and a nozzle, with the nozzles both built into the top of the mixing pipe. The mixing pipe of the bottom reflux mechanism is connected to the discharge port of the cylinder, and the top end of the mixing pipe of the bottom reflux mechanism extends into the cylinder. The two ends of the connecting pipe are respectively connected to the discharge pipe and the mixing pipe of the bottom reflux mechanism. The mixing pipe of the internal reflux mechanism is connected to the connecting pipe and its interior is connected to the interior of the connecting pipe. Each mixing pipe also has a reflux hole at its top end that connects the interior of the cylinder and the interior of the mixing pipe.

2. The rapid mixing center reflux device according to claim 1, characterized in that, Each of the mixing conduits includes an intake chamber, a mixing chamber, and a diffusion chamber arranged sequentially from top to bottom. The nozzle is built into the intake chamber, and the return hole is connected to the intake chamber.

3. The rapid mixing center reflux device according to claim 2, characterized in that, The cross-sectional dimensions of the nozzle are set to gradually decrease vertically downwards.

4. The rapid mixing center reflux device according to claim 2, characterized in that, The mixing chamber has a conical cross-section, and the bottom dimension of the mixing chamber is smaller than the top dimension.

5. The rapid mixing center reflux device according to claim 1, characterized in that, The number of internal reflux mechanisms is two, and the two internal reflux mechanisms are arranged at a vertical interval.

6. The rapid mixing center reflux device according to claim 5, characterized in that, Each of the internal reflux mechanisms has bolt holes at its top and bottom. A connecting flange is provided on the connecting pipe at the corresponding position of the internal reflux mechanism. The mixing pipe of the internal reflux mechanism is connected to the connecting pipe by bolts passing through the connecting flange and extending into the bolt holes.

7. The rapid mixing center reflux device according to claim 1, characterized in that, A flange seat is provided at the discharge port of the cylinder. A bottom flange is formed by the middle part of the mixing pipe of the bottom reflux mechanism protruding outward along its own radial direction. The mixing pipe of the bottom reflux mechanism is connected to the discharge port of the cylinder by bolts through the bottom flange and extending into the flange seat.

8. The rapid mixing center reflux device according to claim 1, characterized in that, It also includes a sealing ring. An annular groove is provided on the outer side wall of the bottom end of the discharge pipe. The sealing ring is connected in the annular groove and abuts against the inner side wall of the connecting pipe.

9. The rapid mixing center reflux device according to claim 1, characterized in that, The number of reflux holes at the suction chamber of each mixing pipe is four, and the four reflux holes are arranged at intervals along the circumference of the mixing pipe.

10. The rapid mixing center reflux device according to claim 9, characterized in that, The reflux hole is a square hole.

Images