Stirring device of molecular sieve crystallization kettle

Abstract

The invention provides a molecular sieve crystallization kettle stirring device which comprises a first stirring shaft, a first stirring driver, a stirring paddle, an anchor paddle and a second stirring driver, and the first stirring shaft is rotatably arranged in a kettle body of a crystallization kettle; the first stirring driver is arranged outside the kettle body and is in dynamic coupling connection with the first stirring shaft; the plurality of stirring paddles are arranged on the first stirring shaft at intervals up and down, the stirring paddle on the uppermost side is the first stirring paddle, and blades of the first stirring paddle are wider than those of the other stirring paddles; the anchor paddle can be rotatably arranged in the kettle body along an up-and-down upward axis, and is provided with a scraping plate which is propped against the inner kettle wall of the kettle body; the second stirring driver is arranged outside the kettle body and is in dynamic coupling connection with the anchor paddle. The stirring device of the molecular sieve crystallization kettle not only ensures the gas dispersion, solid suspension, mass transfer and heat transfer effects of the crystallization kettle in a high-temperature and high-pressure environment, but also realizes a good cleaning effect in the kettle.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and in particular to a stirring device for a molecular sieve crystallization reactor. Background Technology

[0002] In chemical production processes, crystallization reactors are widely used in various reaction systems, playing a crucial role, especially in scenarios involving gas-liquid-solid three-phase reactions. In the initial stages of production, the materials inside the crystallization reactor have high viscosity and easily adhere to the inner wall. This adhesion not only hinders mass and heat transfer efficiency, leading to uneven temperature distribution and affecting product quality, but also significantly prolongs reaction time. Furthermore, after the reaction, the residual material adhering to the inner wall is difficult to clean, increasing equipment maintenance costs and production cycles. Once the material reaches the reaction temperature, its viscosity decreases significantly, and the liquid organic amine vaporizes into gas. At this point, to achieve a complete gas-liquid-solid three-phase reaction, it is necessary to draw in the gas from the liquid surface and disperse it evenly in the liquid, while simultaneously suspending the solid material uniformly in the liquid.

[0003] However, traditional crystallization reactor stirring devices have significant shortcomings in this process. Traditional crystallization reactors generally use a single frame-type or anchor-type agitator. This stirring method can only generate circumferential flow of materials, lacking axial flow, resulting in extremely poor gas intake and making it difficult to meet the requirements for a complete gas-liquid-solid three-phase reaction. If multi-layer axial flow impellers are used, although the gas intake effect is improved, the material is more likely to adhere to the inner wall, further affecting the heat transfer efficiency, resulting in a still very low reaction efficiency. Therefore, existing crystallization reactor stirring devices cannot simultaneously achieve good gas dispersion, heat transfer efficiency, and high cleaning requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a stirring device for a molecular sieve crystallization vessel, which aims to solve the problem that existing crystallization vessel stirring devices cannot simultaneously achieve good gas dispersion, heat transfer efficiency, and high cleaning requirements.

[0005] To solve the above-mentioned technical problems, embodiments of the present invention provide a stirring device for a molecular sieve crystallization reactor, comprising:

[0006] A first stirring shaft is provided, extending vertically, and is rotatably disposed within the crystallization vessel along an upward axis.

[0007] A first stirring actuator is disposed outside the vessel body and is dynamically coupled to a first stirring shaft so as to drive the first stirring shaft to rotate.

[0008] A stirring paddle, wherein multiple stirring paddles are arranged vertically at intervals on the first stirring shaft, the uppermost stirring paddle being the first stirring paddle, and the blades of the first stirring paddle being wider than the blades of the other stirring paddles;

[0009] An anchor paddle, which is rotatably mounted in the vessel body along an upward axis, and the anchor paddle is provided with a scraper that abuts against the inner wall of the vessel body;

[0010] The second stirring actuator is disposed outside the vessel body and is dynamically coupled to the anchor propeller to drive the anchor propeller to rotate.

[0011] In some embodiments, the edges of the impeller blades are rounded.

[0012] In some embodiments, the stirring paddles are provided in three configurations.

[0013] In some embodiments, the blade of the first agitator is a first blade, and the end of the first blade away from the first agitator shaft is curled in the direction of rotation of the first agitator shaft relative to the end closer to the first agitator shaft.

[0014] In some embodiments, the lowest stirring paddle is positioned close to the bottom of the vessel.

[0015] In some embodiments, the impeller located below the first impeller is a second impeller, and the blades of the second impeller are second blades, wherein:

[0016] The end of the second blade closer to the first stirring shaft is wider than the end farther from the first stirring shaft; and / or,

[0017] From one end near the first stirring shaft to the end away from the first stirring shaft, the second blade is curled in the direction of rotation of the first stirring shaft; and / or,

[0018] The second blade is inclined upwards from the end closest to the first stirring shaft to the end furthest from the first stirring shaft.

[0019] In some embodiments, the first stirring driver is disposed at the top of the vessel body and is dynamically coupled to the upper end of the first stirring shaft; the second stirring driver is disposed at the bottom of the vessel body and is dynamically coupled to the bottom of the anchor paddle.

[0020] In some embodiments, the scraper is oscillatingly mounted on the anchor paddle.

[0021] In some embodiments, the anchor paddle includes a blade, the blade including a radial section and an axial section, the radial section extending radially along the first stirring shaft and located below the first stirring shaft, the axial section extending vertically and located on the side of the anchor paddle away from the first stirring shaft, and the lower end of the axial section being connected to the end of the radial section away from the first stirring shaft.

[0022] In some embodiments, the radial segments of the plurality of blades are connected at one end near the first stirring shaft, and a plurality of scrapers are provided at intervals on each blade along the extension direction of the blade.

[0023] In some embodiments, the anchor paddle further includes a reinforcing ring, through which the axial sections of the plurality of paddle blades are connected.

[0024] In some embodiments, the blades are provided in three parts.

[0025] In some embodiments, multiple reinforcing rings are provided at intervals between the upper and lower parts.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The molecular sieve crystallization reactor stirring device of the present invention adopts a multi-layer stirring paddle design. The first stirring paddle at the top is equipped with a wide blade, which can generate a large amount of axial flow. This helps to efficiently draw organic amine gas on the liquid surface into the liquid and prolong its residence time in the liquid. The stirring paddle in the middle is responsible for uniformly dispersing the gas and transporting it to the bottom of the reactor, while the stirring paddle at the bottom can uniformly suspend the solid material at the bottom of the reactor. In addition, when stirring with the stirring paddle, the scraper on it can effectively scrape the reactor wall to prevent the material from adhering to the reactor wall. This not only ensures the gas dispersion, solid suspension, mass transfer and heat transfer effect of the crystallization reactor under high temperature and high pressure environment, but also achieves a good cleaning effect inside the reactor. Attached Figure Description

[0028] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0029] Figure 1 This is a schematic diagram of the stirring device of the molecular sieve crystallization vessel in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the first stirring impeller;

[0031] Figure 3 for Figure 2 A schematic diagram of the first stirring impeller from another perspective;

[0032] Figure 4 for Figure 1 A schematic diagram of the structure of the second stirring impeller;

[0033] Figure 5 for Figure 4 A schematic diagram of the second stirring impeller from another perspective;

[0034] Figure 6 for Figure 1 Schematic diagram of the structure of the mid-mounted anchor jack;

[0035] Figure 7 for Figure 6 A schematic diagram of the structure at the middle scraper.

[0036] Explanation of reference numerals in the accompanying drawings of this invention:

[0037] The molecular sieve crystallization reactor includes a stirring device 100, a first stirring shaft 1, a first stirring driver 2, a first stirring motor 2a, a first frame 21, a second frame 22, a first mechanical seal 23, a mounting base 24, a coupling 25, a stirring paddle 3, a first stirring paddle 3a, a second stirring paddle 3b, a blade 31, a first blade 31a, a second blade 31b, a hub 32, a blade root 33, a support column 34, an anchor paddle 4, a scraper 41, a blade 42, a radial section 421, an axial section 422, an arc section 423, a reinforcing ring 43, a support lug 44, a sleeve 45, a pin bolt 46, a clamping plate 47, a fixing bolt 48, a second stirring driver 5, a second stirring motor 5a, a reducer 51, a third frame 52, a fourth frame 53, a second mechanical seal 54, a second stirring shaft 55, and a reactor body 200.

[0038] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are 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 with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0042] This invention provides a stirring device for a molecular sieve crystallization vessel. Figures 1 to 7 A preferred embodiment of the stirring apparatus for the molecular sieve crystallization vessel provided by the present invention is shown.

[0043] Please see Figures 1 to 5 In this embodiment, the molecular sieve crystallization reactor stirring device 100 includes a first stirring shaft 1, a first stirring driver 2, a stirring paddle 3, an anchor paddle 4, and a second stirring driver 5. The first stirring shaft 1 extends vertically and is rotatably disposed within the reactor body 200 of the crystallization reactor along an upward axis. The first stirring driver 2 is disposed outside the reactor body 200 and is dynamically coupled to the first stirring shaft 1 to drive the first stirring shaft 1 to rotate. Multiple stirring paddles 3 are arranged vertically at intervals on the first stirring shaft 1, with the uppermost stirring paddle 3 being the first stirring paddle 3a, whose blades 31 are wider than those of the other stirring paddles 3. The anchor paddle 4 is rotatably disposed within the reactor body 200 along an upward axis and has a scraper 41 that abuts against the inner wall of the reactor body 200. The second stirring driver 5 is disposed outside the reactor body 200 and is dynamically coupled to the anchor paddle 4 to drive the anchor paddle 4 to rotate.

[0044] Specifically, the molecular sieve crystallization vessel stirring device 100 is used in the crystallization vessel and is installed on the vessel body 200 of the crystallization vessel. The first stirring shaft 1 and the anchor 4 are both rotatably arranged inside the vessel body 200 along the vertical axis. The first stirring driver 2 and the second stirring driver 5 are arranged on the outer wall of the vessel body 200. The first stirring driver 2 and the second stirring driver 5 can drive the first stirring shaft 1 and the anchor 4 to rotate, respectively. The first stirring driver 2 and the second stirring driver 5 can be motors, etc. The following description will take the first stirring driver 2 as the first stirring motor 2a and the second stirring driver 5 as the second stirring motor 5a as examples.

[0045] Multiple agitators 3 are arranged vertically and at intervals on the first agitator shaft 1. The agitators 3 can be installed inside the vessel body 200 through the manhole. When the first agitator driver 2 drives the first agitator shaft 1 to rotate, the first agitator shaft 1 can drive the multiple agitators 3 on it to rotate together. The specific number of agitators 3 can be set according to actual conditions; for example, the first agitator shaft 1 can have two, three, four, five, or more agitators 3. Optionally, please refer to... Figure 1 In this embodiment, three stirring paddles 3 are provided. The following will take the example of three stirring paddles 3 provided on the first stirring shaft 1 as an example.

[0046] The uppermost of the three stirring paddles 3 is the first stirring paddle 3a. Each of the three stirring paddles 3 may have one or more blades 31. The three stirring paddles 3 may have the same number of blades 31, for example, each of the three stirring paddles 3 may have two, three, four, five or more blades 31. The three stirring paddles 3 may also have different numbers of blades 31, for example, the first stirring paddle 3a may have more blades 31 than the other two stirring paddles 3. The following will assume that each stirring paddle 3 has four blades 31 evenly arranged along the rotation direction of the first stirring shaft 1.

[0047] One of the three impellers 3 is the first impeller 3a. The structures of the other two impellers 3 may be the same or different. Optionally, please refer to [link / reference needed]. Figure 1 In this embodiment, the structures of the multiple stirring paddles 3 are the same except for the first stirring paddle 3a. The following will take one of the three stirring paddles 3 as the first stirring paddle 3a and the other two stirring paddles 3 as the second stirring paddle 3b as an example.

[0048] The first stirring shaft 1 is equipped with one first stirring blade 3a and two second stirring blades 3b. The first stirring blade 3a is located at the top, and the stirring blade 3b located below the first stirring blade 3a is the second stirring blade 3b. The blade 31 of the first stirring blade 3a is the first blade 31a, and the blade 31 of the second stirring blade 3b is the second blade 31b. The width of the first blade 31a is wider than the width of the second blade 31b. The first stirring shaft 1 is equipped with three layers of stirring blades 3. The first stirring blade 3a is a four-bladed high-efficiency blade. The top four-bladed high-efficiency blade can generate a large amount of axial flow, which helps to efficiently draw organic amine gas on the liquid surface into the liquid and prolong its residence time in the liquid. The middle second stirring blade 3b is responsible for uniformly dispersing and transporting the gas to the bottom of the vessel, while the bottom second stirring blade 3b can uniformly suspend the solid material at the bottom of the vessel. In this way, the three layers of stirring blades 3 work together to enable efficient and complete reaction of the gas, liquid, and solid phases. All three layers of stirring paddles 3 have a four-blade structure, which results in a more uniform distribution of centrifugal force and liquid-induced reaction force during high-speed operation, and better balance, effectively reducing equipment vibration. The first stirring shaft 1, the first stirring paddle 3a, and the two second stirring paddles 3b form the upper stirring of the molecular sieve crystallization kettle stirring device 100.

[0049] The anchor paddle 4 forms the lower agitator of the molecular sieve crystallization reactor stirring device 100. A scraper 41 is mounted on the anchor paddle 4, with the end of the scraper 41 furthest from the anchor paddle 4 contacting the inner wall of the reactor body 200. When the second stirring driver 5 drives the anchor paddle 4 to rotate, the anchor paddle 4 can drive the scraper 41 on it to rotate together, allowing the scraper 41 to effectively scrape the reactor wall and prevent material from adhering to it. The scraper 41 on the anchor paddle 4 is typically arranged along the rotation direction of the anchor paddle 4 and / or vertically, so that the anchor paddle 4 with the fully covered scraper 41 can scrape all areas of the reactor wall, preventing material from adhering to it, resulting in better heat transfer performance and cleaning.

[0050] The upper and lower stirring of the molecular sieve crystallization reactor stirring device 100 can use different or the same rotation speeds. Similarly, the upper and lower stirring of the molecular sieve crystallization reactor stirring device 100 can also use different or the same direction of rotation to meet more process requirements of users, thereby obtaining products with more stable skeleton structure and more uniform grain size. Optionally, in this embodiment, the rotation speed of the first stirring shaft 1 is greater than the rotation speed of the anchor 4, that is, the upper stirring of the molecular sieve crystallization reactor stirring device 100 operates at high speed, and the lower stirring of the molecular sieve crystallization reactor stirring device 100 operates at low speed.

[0051] The molecular sieve crystallization reactor stirring device 100 of the present invention adopts a multi-layer stirring paddle 3 design. The first stirring paddle 3a at the top is equipped with a wider blade 31, which can generate a large amount of axial flow. This helps to efficiently draw organic amine gas on the liquid surface into the liquid and prolong its residence time in the liquid. The stirring paddle 3 in the middle is responsible for uniformly dispersing and transporting the gas to the bottom of the reactor, while the stirring paddle 3 at the bottom can uniformly suspend the solid material at the bottom of the reactor. In addition, when the stirring is carried out by the anchor paddle 4, the scraper 41 on it can effectively scrape the reactor wall to prevent the material from adhering to the reactor wall. This not only ensures the gas dispersion, solid suspension and mass and heat transfer effects of the crystallization reactor under high temperature and high pressure environment, but also achieves a good cleaning effect inside the reactor.

[0052] Optionally, please refer to Figures 1 to 5 In this embodiment, the edges of the blades 31 of the stirring paddle 3 are rounded.

[0053] Specifically, the first blade 31a of the first agitator 3a has a rounded edge, and the second blade 31b of the second agitator 3b has a rounded edge. The rounded blades 31 are less prone to material accumulation and are easier to clean.

[0054] Optionally, please refer to Figures 1 to 3 In this embodiment, the end of the first blade 31a away from the first stirring shaft 1 is curled in the direction of rotation of the first stirring shaft 1 relative to the end closer to the first stirring shaft 1. The end of the first blade 31a is curled.

[0055] Optionally, please refer to Figures 1 to 3 In this embodiment, the first stirring paddle 3a includes a hub 32 and a blade root 33. The hub 32 is sleeved on the first stirring shaft 1, and each first blade 31a is connected to the hub 32 through a blade root 33. The hub 32 of the first stirring paddle 3a can be bolted to the first stirring shaft 1.

[0056] Optionally, please refer to Figure 1 In this embodiment, the lowest stirring paddle 3 is positioned close to the bottom of the vessel body 200. The second stirring paddle 3b at the bottom is located at the lowest end of the first stirring shaft 1 and close to the bottom of the vessel body 200, which facilitates the uniform suspension of solid matter at the bottom of the vessel by the second stirring paddle 3b at the bottom.

[0057] Optionally, please refer to Figure 1 , Figure 4 and Figure 5 In this embodiment, the second blade 31b is curled in the direction of rotation of the first stirring shaft 1 from one end near the first stirring shaft 1 to the other end away from the first stirring shaft 1. The second blade 31b of the second stirring paddle 3b is curled in the whole, so the second stirring paddle 3b is a four-bladed arc paddle.

[0058] Optionally, please refer to Figure 1 , Figure 4 and Figure 5 In this embodiment, the second blade 31b is inclined upwards from the end closest to the first stirring shaft 1 to the end furthest from the first stirring shaft 1. The second blade 31b is tilted upwards at a certain angle, and both the middle second stirring blade 3b and the bottom second stirring blade 3b are four-bladed arc blades with an upward tilt. The middle second stirring blade 3b using a four-bladed arc blade with an upward tilt is beneficial for evenly dispersing and conveying the gas to the bottom of the vessel; while the bottom second stirring blade 3b using a four-bladed arc blade with an upward tilt allows the bottom second stirring blade 3b to avoid the bottom anchor blade 4 and to be as close as possible to the bottom of the vessel, so that the solid material at the bottom of the vessel is evenly suspended.

[0059] Optionally, please refer to Figure 1 , Figure 4 and Figure 5 In this embodiment, the end of the second blade 31b closer to the first stirring shaft 1 is wider than the end farther from the first stirring shaft 1. The width of the end of the second blade 31b is smaller than the width of its root.

[0060] Optionally, please refer to Figure 1 , Figure 4 and Figure 5 In this embodiment, the second stirring paddle 3b includes a hub 32 and support columns 34. The hub 32 is sleeved on the first stirring shaft 1, and each second blade 31b is connected to the hub 32 through one or two support columns 34. The hub 32 of the second stirring paddle 3b can be bolted to the first stirring shaft 1.

[0061] Optionally, please refer to Figure 1 In this embodiment, the first stirring driver 2 is disposed at the top of the vessel body 200 and is poweredly coupled to the upper end of the first stirring shaft 1; the second stirring driver 5 is disposed at the bottom of the vessel body 200 and is poweredly coupled to the bottom of the anchor paddle 4.

[0062] Specifically, the first stirring driver 2 and the second stirring driver 5 are respectively located at the top and bottom of the vessel body 200, which avoids the problem of insufficient installation space at the top of the vessel body 200.

[0063] Optionally, please refer to Figure 1 In this embodiment, a first frame 21 and a second frame 22 are provided between the first stirring motor 2a and the top of the vessel body 200. The motor shaft of the first stirring motor 2a is connected to the upper end of the first stirring shaft 1 through a coupling 25.

[0064] Specifically, the first stirring motor 2a can be mounted with a vertical flange, and the first frame 21 and the second frame 22 can be mounted with cylindrical upper and lower flanges. The first stirring motor 2a and the first frame 21 can be bolted together, as can the first frame 21 and the second frame 22. The first mechanical seal 23 is mounted on the mounting base 24 and fixed with bolts, and the first mechanical seal 23 is sleeved on the first stirring shaft 1 to provide a sealing function. The mounting base 24 is mounted on the upper flange of the vessel body 200.

[0065] Optionally, please refer to Figure 1 In this embodiment, a third frame 52 and a fourth frame 53 are provided between the second stirring motor 5a and the bottom of the vessel body 200. The second stirring motor 5a is connected to the bottom of the anchor paddle 4 through a reducer 51.

[0066] Specifically, the second stirring motor 5a can be mounted with a vertical flange, the reducer 51 is mounted with a parallel shaft, and the third frame 52 and the fourth frame 53 can be mounted with cylindrical upper and lower flanges. The second stirring motor 5a is fixed to the connecting flange of the reducer 51 by bolts. The reducer 51 and the third frame 52 can be bolted together, as can the third frame 52 and the fourth frame 53. The fourth frame 53 is bolted to the lower flange of the vessel body 200. The second mechanical seal 54 is bolted to the lower flange of the vessel body 200 and is fitted onto the second stirring shaft 55 for sealing. The anchor 4 is bolted to the second stirring shaft 55.

[0067] Optionally, please refer to Figure 1 , Figure 6 and Figure 7 In this embodiment, the scraper 41 is oscillatingly mounted on the anchor 4. The scraper 41 can be made of PTFE or the like, and can have a hinge structure. The scraper 41 is a movable scraper, which can self-compensate and fit according to the shape of the vessel body 200 to better scrape the inner wall of the vessel body 200.

[0068] The anchor 4 is provided with support ears 44, the pin bolt 46 passes through the two support ears 44 and is fixed with nuts, the sleeve 45 is sleeved on the pin bolt 46, the sleeve 45 can rotate along the pin bolt 46, the sleeve 45 is provided with clamping plates 47, and the scraper 41 near the anchor 4 is installed between the two clamping plates 47 by fixing bolt 48.

[0069] Optionally, please refer to Figure 1 , Figure 6 and Figure 7In this embodiment, the anchor paddle 4 includes a blade 42, which includes a radial section 421 and an axial section 422. The radial section 421 extends radially along the first stirring shaft 1 and is located on the lower side of the first stirring shaft 1. The axial section 422 extends vertically and is located on the side of the stirring paddle 3 away from the first stirring shaft 1. The lower end of the axial section 422 is connected to the end of the radial section 421 away from the first stirring shaft 1. Multiple blades 42 are arranged along the rotation direction of the first stirring shaft 1. The radial sections 421 of the multiple blades 42 are connected near the end of the first stirring shaft 1. Multiple scrapers 41 are spaced apart on each blade 42 along the extension direction of the blade 42.

[0070] Specifically, blade 42 is an L-shaped blade, and the cross-section of blade 42 can be circular, triangular, or square, etc. There can be two, three, four, or more blades 42. Optionally, please refer to... Figure 1 , Figure 6 and Figure 7 In this embodiment, three blades 42 are provided. The following description will take the case of three blades 42 as an example.

[0071] The anchor 4 employs three L-shaped blades 42, meaning the anchor 4 is a three-bladed anchor 4, and a scraper 41 is located near the vessel side of the L-shaped blades 42. Further details can be found in the following section. Figure 1 , Figure 6 and Figure 7 In this embodiment, the blade 42 further includes an arc-shaped segment 423 disposed between the radial segment 421 and the axial segment 422, so that the shape of the blade 42 is adapted to the shape of the vessel body 200.

[0072] Optionally, please refer to Figure 1 , Figure 6 and Figure 7 In this embodiment, the anchor 4 also includes a reinforcing ring 43, and the axial sections 422 of the multiple blades 42 are connected by the reinforcing ring 43. The reinforcing ring 43 is divided into three sections to connect the three L-shaped blades 42 together, and the reinforcing ring 43 can be fixed to the blades 42 by bolts.

[0073] The reinforcing ring 43 can be provided as one or multiple rings spaced vertically. Optionally, please refer to [link / reference]. Figure 1 , Figure 6 and Figure 7 In this embodiment, two reinforcing rings 43 are arranged at intervals, one reinforcing ring 43 is located at the uppermost end of the blade 42, and the other reinforcing ring 43 is located between the first stirring blade 3a and the middle second stirring blade 3b.

[0074] The function of the molecular sieve crystallization kettle stirring device 100 is to achieve efficient mass transfer and heat transfer of gas, liquid and solid phases and thorough cleaning without dead angles under high pressure, high temperature and fatigue conditions. It has good blade balance and excellent equipment stability, which improves production efficiency and enhances product quality.

[0075] The molecular sieve crystallization reactor stirring device 100 operates at high speed. The four-bladed high-efficiency impeller efficiently draws organic amine gas from the liquid surface into the liquid, increasing its residence time. The four-bladed arc impeller in the middle evenly disperses the gas and transports it to the bottom of the reactor. The four-bladed arc impeller at the bottom ensures uniform suspension of solids at the bottom of the reactor. The synergistic effect of the three layers of impellers 3 allows for efficient and complete reaction of the gas, liquid, and solid phases. All three layers of impellers 3 are four-bladed, resulting in a more uniform distribution of centrifugal force and liquid-induced reaction force during high-speed operation, leading to better balance and effectively reducing equipment vibration.

[0076] The stirring device 100 of the molecular sieve crystallization kettle operates at low speed. The movable scraper 41 can self-compensate and fit according to the shape of the kettle body 200 to scrape the inner kettle wall, prevent material adhesion, and improve heat transfer performance. The three-bladed anchor 4 has a 50% better disturbance effect on the material on the inner kettle wall than the conventional two-bladed anchor 4. It can achieve the same stirring effect as the two-bladed anchor 4 at a lower speed, thus saving energy. The wear of the scraper 41 is also less and the service life is longer. The centrifugal force distribution of the three-bladed anchor 4 is better than that of the two-bladed anchor 4, which makes the equipment vibration less.

[0077] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A stirring device for a molecular sieve crystallization reactor, characterized in that, include: A first stirring shaft is provided, extending vertically, and is rotatably disposed within the crystallization vessel along an upward axis. A first stirring actuator is disposed outside the vessel body and is dynamically coupled to a first stirring shaft so as to drive the first stirring shaft to rotate. A stirring paddle, wherein multiple stirring paddles are arranged vertically at intervals on the first stirring shaft, the uppermost stirring paddle being the first stirring paddle, and the blades of the first stirring paddle being wider than the blades of the other stirring paddles; An anchor paddle, which is rotatably mounted in the vessel body along an upward axis, and the anchor paddle is provided with a scraper that abuts against the inner wall of the vessel body; The second stirring actuator is disposed outside the vessel body and is dynamically coupled to the anchor propeller to drive the anchor propeller to rotate.

2. The stirring device for the molecular sieve crystallization vessel as described in claim 1, characterized in that, The blades of the agitator have rounded edges; and / or, there are three agitators.

3. The stirring device for the molecular sieve crystallization vessel as described in claim 1, characterized in that, The blade of the first stirring paddle is a first blade, and the end of the first blade away from the first stirring shaft is curled in the direction of rotation of the first stirring shaft relative to the end closer to the first stirring shaft.

4. The stirring device for the molecular sieve crystallization vessel as described in claim 1, characterized in that, The lowest stirring paddle is positioned close to the bottom of the vessel.

5. The stirring device for the molecular sieve crystallization vessel as described in claim 1, characterized in that, The impeller located below the first impeller is a second impeller, and the blades of the second impeller are second blades, wherein: The end of the second blade closer to the first stirring shaft is wider than the end farther from the first stirring shaft; and / or, From one end near the first stirring shaft to the end away from the first stirring shaft, the second blade is curled in the direction of rotation of the first stirring shaft; and / or, The second blade is inclined upwards from the end closest to the first stirring shaft to the end furthest from the first stirring shaft.

6. The stirring device for the molecular sieve crystallization vessel as described in claim 1, characterized in that, The first stirring actuator is disposed at the top of the vessel body and is dynamically coupled to the upper end of the first stirring shaft; the second stirring actuator is disposed at the bottom of the vessel body and is dynamically coupled to the bottom of the anchor paddle.

7. The stirring device for the molecular sieve crystallization vessel as described in claim 1, characterized in that, The scraper is mounted on the anchor blade in a swinging configuration.

8. The stirring device for the molecular sieve crystallization vessel as described in claim 1, characterized in that, The anchor paddle includes a blade, which includes a radial section and an axial section. The radial section extends radially along the first stirring shaft and is located below the first stirring shaft. The axial section extends vertically and is located on the side of the paddle away from the first stirring shaft. The lower end of the axial section is connected to the end of the radial section away from the first stirring shaft. The blades are arranged in multiple ways along the rotation direction of the first stirring shaft, and the radial sections of the multiple blades are connected at one end near the first stirring shaft. Each blade is provided with multiple scrapers at intervals along the extension direction of the blade.

9. The stirring device for the molecular sieve crystallization vessel as described in claim 8, characterized in that, The anchor paddle also includes a reinforcing ring, through which the axial sections of the plurality of paddle blades are connected; and / or, the paddle blades are provided in three configurations.

10. The stirring device for the molecular sieve crystallization vessel as described in claim 9, characterized in that, Multiple reinforcing rings are arranged at intervals on the upper and lower sides.

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