A crystallization apparatus

Abstract

The application discloses a crystallization device, which comprises a main body, a containing cavity is arranged in the main body, a reverse conical flow guide base is arranged at the bottom of the main body, a liquid inlet is arranged above the reverse conical flow guide base, a liquid outlet is arranged at the upper portion of the main body, a flow guide assembly is arranged between the liquid inlet and the liquid outlet, the flow guide assembly comprises a sedimentation part and a flow guide part arranged at the bottom of the sedimentation part, the flow guide part is protrusively arranged towards the reverse conical flow guide base, the flow guide part is provided with a flow guide hole penetrating the sedimentation part, the flow guide part is further provided with a flow guide surface arranged in the circumferential direction of the flow guide hole, and the flow guide hole is located in the central region of the containing cavity. The application provides the crystallization device to solve the technical problems that the slurry sedimentation efficiency of the existing crystallization device is low and particles are easily wrapped to the liquid outlet.

Description

Technical Field

[0001] This application belongs to the field of desulfurization tower crystallization technology, specifically relating to a crystallization device. Background Technology

[0002] In the existing technology, the concentrated slurry from the desulfurization tower enters the crystallization device through the slurry inlet. The crystallization device has an inlet at the bottom and a storage outlet at the top. The slurry continuously flows into the crystallization device from the inlet. As the crystallization device rises, the slurry settles, allowing the clear liquid to flow out from the outlet at the top. Therefore, during the rising process, solid particles (such as desulfurization by-product crystals) need to overcome the resistance of the rising slurry flow to complete the settling. Not only is the settling time short, but they are also easily carried by the rising slurry to the upper clear liquid zone, resulting in insufficient purity of the clear liquid and low crystal recovery rate.

[0003] A current technology describes a crystallization apparatus comprising an inverted conical base at the bottom, with a liquid inlet located above the base. A guide member is positioned above the liquid inlet, including a guide hole and a support shaft at the center of the guide hole. The guide member also has an outlet. When the slurry enters the crystallization apparatus through the inlet, it rotates and gradually rises under the guidance of the inverted conical base. Guided by the guide member, the rotating slurry is directed to the outlet. The rotation utilizes centrifugal force to improve the sedimentation efficiency of the slurry. Under the guidance of the guide member, the slurry rotates and flows out of the inlet. During the slurry's ascent, the slurry near the inner wall of the apparatus experiences stronger centrifugal force due to its larger radius of rotation, allowing solid particles to quickly aggregate and settle towards the wall. However, the slurry near the central support shaft rotates slowly and experiences weaker centrifugal force, making it difficult to effectively separate many fine crystals. These fine crystals are still carried along with the rising liquid flow to the outlet, causing some unsettled fine crystals to flow out with the clear liquid. Utility Model Content

[0004] This application provides a crystallization apparatus to solve the technical problems of low slurry settling efficiency and easy entrainment of particles to the outlet in existing crystallization apparatuses.

[0005] The technical solution adopted in this application is as follows: a crystallization device, including a main body, an internal cavity, an inverted conical guide seat at the bottom of the main body, an inlet above the inverted conical guide seat, an outlet at the top of the main body, a guide assembly between the inlet and the outlet, the guide assembly including a settling member and a guide member disposed at the bottom of the settling member, the guide member protruding towards the inverted conical guide seat, the guide member having a guide hole penetrating to the settling member, and the guide member also having a guide surface circumferentially arranged around the guide hole, the guide hole being located in the central region of the cavity.

[0006] The crystallization apparatus of this application further includes the following additional technical features: Multiple flow stabilizers are installed inside the flow guide hole, and these flow stabilizers are arranged sequentially at intervals along the axial direction of the flow guide hole.

[0007] The flow stabilizer extends radially along the guide hole. The flow-facing surface of the flow stabilizer has an angle α with the plane perpendicular to the axis of the guide hole. The value of α is in the range of 15°≤α≤30°.

[0008] The upper surface of the settling component is also provided with a flow guide, which is located above the flow guide hole and connected to the flow guide hole. The flow guide has a flow guide hole that is connected to the flow guide hole.

[0009] The main body is equipped with a liquid inlet pipe, which extends at least partially into the receiving cavity, and the end of the liquid inlet pipe is equipped with a liquid inlet.

[0010] The axis of the liquid inlet is set at an angle β with the vertical direction, and the value of β is in the range of 10°≤β≤20°.

[0011] The inverted conical guide seat includes an inverted conical guide cavity and a guide plate disposed on the inner wall of the guide cavity.

[0012] The bottom of the guide cavity is also provided with a discharge port, and the guide plate has a spiral guide protrusion.

[0013] The flow guide includes multiple guides, each of which has a flow guide surface. The flow guide surface is arc-shaped. The multiple guides are connected sequentially along the circumference of the flow guide hole and arranged in a circular array along the circumference of the flow guide. The flow guide surfaces of each guide are connected to form a continuous flow guide surface.

[0014] The two adjacent guide members are connected by an elastic seal. The guide member also includes a support member. The guide hole is provided on the support member. One end of the guide member is movably provided on the support member through a first moving member, and the other end is movably provided on the settling member through a second moving member. The guide member is rotatably connected to the first moving member and the second moving member respectively. The first moving member moves along the axial direction of the guide hole, and the second moving member moves along the radial direction of the settling member.

[0015] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. This application utilizes an inverted conical guide seat. After the slurry enters the receiving cavity from the inlet, it rotates and gradually rises under the guidance of the inverted conical guide seat. Due to centrifugal force, the slurry on the outer periphery rotates at a high speed and has high kinetic energy, while the slurry in the central region rotates at a slower speed and has smoother flow. During the rotation and ascent, the particles gradually settle under the influence of centrifugal force and gravity. The guide holes transport a portion of the slow-moving liquid in the central region to the top of the settling element. The slow-moving liquid stays in the settling element area, and the tiny particles in the slurry can gradually settle to the surface of the settling element under the action of gravity, achieving efficient separation of particles and slurry, improving the collection rate of crystallization products, and preventing particles from flowing out of the outlet with the clear liquid. When the slurry rises from the inverted conical guide seat to the guide element area, the circumferentially distributed guide surface can form a uniform circumferential guide for the slurry, guiding the slurry to accelerate rotation along the inclined direction of the guide surface, pushing the particles against the inner wall of the receiving cavity, and improving the particle settling efficiency. Meanwhile, the guide surface can ensure that the slurry generates a uniform rotating flow field below the settling element, thereby improving the settling efficiency.

[0016] 2. As a preferred embodiment of this application, by setting up flow stabilizers, the slow-moving liquid in the center enters the guide hole and flows through each flow stabilizer in sequence. The flow stabilizers can weaken the disordered eddies remaining in the liquid (such as local turbulence caused by the surrounding slurry), allowing the liquid to rise smoothly in the guide hole and prolonging the residence time of the liquid in the guide hole, providing more sufficient gravity settling time for small particles. At the same time, the liquid passing through the flow stabilizers is more stable when it reaches the settling element, which facilitates further sedimentation of the liquid above the settling element.

[0017] Furthermore, by setting the flow stabilizer to extend radially along the guide hole, its frontal surface has an angle α with the plane perpendicular to the axis of the guide hole. This angle avoids the direct obstruction of the liquid by the horizontal blades, which would cause turbulence. Instead, it uses the lateral force of the inclined frontal surface to gradually dissolve the residual micro-disordered vortices in the liquid, guiding the liquid into a stable laminar flow that rises steadily along the axis of the guide hole. At the same time, the stepped resistance regulation formed by multiple flow stabilizers along the axis can gradually reduce the liquid's rising speed along the path, avoiding flow field disturbances caused by sudden changes in flow velocity. Ultimately, the liquid rises continuously to the top of the settling device in a stable laminar state, providing a stable fluid basis for the sedimentation of the slurry above the settling device.

[0018] 4. In a preferred embodiment of this application, the guide member is designed to directly receive the liquid flowing out of the guide hole. Through its internal guide hole, the liquid is smoothly transported along a predetermined path to the upper surface of the settling member, avoiding splashing and impact that may occur when the liquid is directly ejected from the orifice. This achieves a smooth transition from the guide hole to the surface of the settling member, creating stable initial conditions for subsequent settling and separation. The protruding guide member directs the liquid to a specific area (usually the central area) on the upper surface of the settling member, and then the liquid spreads evenly from the center outwards, ensuring that the liquid can uniformly cover the entire surface of the settling member.

[0019] 4. As a preferred embodiment of this application, by setting the inlet pipe to extend at least partially into the receiving cavity, it is possible to avoid the disordered rebound turbulence caused by the direct impact of the inlet pipe on the inner wall of the receiving cavity. The slurry is directionally transported to the area above the inverted conical guide seat through the end inlet, so that the slurry can directly enter the inverted conical guide seat and reduce the diffusion loss of the slurry in non-target areas. At the same time, the directional transport effect of the inlet allows the slurry to contact the inverted conical guide seat in a more concentrated and uniform initial state, thereby improving the guiding effect of the inverted conical guide seat.

[0020] Furthermore, by setting an included angle β, the slurry flows out from the inlet in a directional flow trajectory that is obliquely downward and close to the inner wall of the inverted conical guide seat. This guides the slurry to slide smoothly down the inner wall of the inverted conical guide seat, and naturally forms a spiral upward trend by means of the converging effect of the inverted conical structure. This avoids direct collision between the slurry and the guide component, and lays the foundation for guiding the rotating flow field on the guide surface in advance.

[0021] 5. As a preferred embodiment of this application, by setting a guide plate, the plate body of the guide plate is equivalent to forming a buffer medium between the slurry and the cavity wall. The slurry first contacts the guide plate instead of directly impacting the cavity wall. The plate body can convert the vertical impact of the slurry into a lateral force that slides along the plate body, greatly dispersing the impact energy and avoiding long-term impact leading to wear on the guide cavity wall surface.

[0022] Furthermore, by setting a discharge port at the bottom of the guiding cavity, operators can easily remove accumulated sediment particles from the guiding cavity, improving removal efficiency. The guide protrusion enhances the guiding ability of the slurry, and its spiral design helps to create a stable rotating flow field, providing a more orderly fluid basis for subsequent cooperation with the guide components.

[0023] 6. As a preferred embodiment of this application, by setting a guide surface, the slurry maintains its rotational kinetic energy by contacting the guide surface during the rotational ascent. The guide surface does not generate reverse resistance in the rotational direction. Instead, it guides the slurry to flow smoothly in the rotational direction through the forward support of the arc surface, reducing energy loss during the rotation of the slurry, ensuring that the slurry maintains a stable rotational state during the ascent, and improving the sedimentation efficiency of the slurry during the rotation process.

[0024] Furthermore, by setting a first moving part and a second moving part, when the first moving part moves axially closer to or away from the inverted conical guide seat, it will drive the end of the guide to move axially synchronously. At the same time, the second moving part moves radially closer to or away from the center of the guide hole, which can pull the other end of the guide to move radially. Under the linkage of the two, the tilt angle of the guide changes, thereby making the angle between the guide surface formed by the connection of multiple guides and the axis of the guide hole continuously adjustable, so that the crystallization device can adapt to different working conditions. For example, when processing high-viscosity slurry, the angle can be increased to slow down the upward speed of the slurry and avoid the attenuation of rotational kinetic energy due to high viscosity; when processing low-viscosity slurry, the angle can be appropriately reduced to enhance rotational guidance and prevent the slurry from deviating from the rotation trajectory due to excessive fluidity. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an overall schematic diagram of a crystallization apparatus according to one embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of a crystallization apparatus according to one embodiment of this application; Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0026] List of components and reference numerals: 1. Main body; 11. Liquid inlet; 12. Liquid outlet; 13. Liquid inlet pipe; 2. Receiving cavity; 3. Inverted conical guide seat; 31. Guide cavity; 32. Guide plate; 33. Discharge port; 4. Guide assembly; 41. Settling component; 411. Second moving component; 412. First guide groove; 413. First driving component; 42. Guide component; 421. Guide hole; 422. Guide surface; 423. Flow stabilizer; 424. Flow-facing surface; 425. Guide component; 426. Support component; 427. First moving component; 428. Second guide groove; 429. Second driving component; 5. Drainage component; 51. Drainage hole. Detailed Implementation

[0027] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0029] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0032] like Figure 1 , Figure 2 , Figure 3As shown, a crystallization apparatus includes a main body 1, an internal cavity 2, an inverted conical flow guide seat 3 at the bottom of the main body 1, an inlet 11 above the inverted conical flow guide seat 3, an outlet 12 at the top of the main body 1, and a flow guide assembly 4 between the inlet 11 and the outlet 12. The flow guide assembly 4 includes a settling member 41 and a flow guide 42 disposed at the bottom of the settling member 41. The flow guide 42 protrudes toward the inverted conical flow guide seat 3 and has a flow guide hole 421 that extends through to the settling member 41. The flow guide 42 also has a flow guide surface 422 arranged circumferentially around the flow guide hole 421. The flow guide hole 421 is located in the central region of the cavity 2.

[0033] This application utilizes an inverted conical guide seat 3. After the slurry enters the receiving cavity 2 through the inlet 11, it rotates and gradually rises under the guidance of the inverted conical guide seat 3. Due to centrifugal force, the slurry on the outer periphery rotates at a high speed and has high kinetic energy, while the slurry in the central region rotates at a slow speed and has a smoother flow. During the rotation and ascent, the particles gradually settle under the influence of centrifugal force and gravity. The guide hole 421 transports a portion of the slow-moving liquid in the central region to the top of the settling member 41. The slow-moving liquid stays in the area of ​​the settling member 41, and the tiny particles in the slurry can gradually settle to the surface of the settling member 41 under the action of gravity, achieving efficient separation of particles and slurry, improving the collection rate of crystallization products, and preventing particles from flowing out of the outlet 12 with the clear liquid. When the slurry rises from the inverted conical guide seat 3 to the guide member 42 area, the circumferentially distributed guide surface 422 can uniformly guide the slurry circumferentially, guiding the slurry to accelerate rotation along the inclined direction of the guide surface 422, pushing the particles towards the inner wall of the receiving cavity 2, and improving the particle settling efficiency. At the same time, the guide surface 422 can ensure that a uniform rotating flow field is generated below the settling member 41, thereby improving the sedimentation efficiency.

[0034] Furthermore, in the vertically upward direction, the angle between the axis of the guide surface 422 and the axis of the guide hole 421 is an acute angle. As one of the preferred embodiments of this application, such as Figure 3 As shown, a plurality of flow stabilizers 423 are provided inside the flow guide hole 421, and the plurality of flow stabilizers 423 are arranged sequentially at intervals along the axial direction of the flow guide hole 421.

[0035] By incorporating flow stabilizers 423, the slow-moving liquid from the center enters the guide hole 421 and flows sequentially through each flow stabilizer 423. The flow stabilizers 423 weaken residual disordered eddies in the liquid (such as localized turbulence caused by the peripheral slurry), allowing the liquid to rise smoothly within the guide hole 421. This extends the residence time of the liquid within the guide hole 421, providing more sufficient time for the fine particles to settle due to gravity. Simultaneously, the liquid passing through the flow stabilizers 423 becomes more stable upon reaching the settling element 41, facilitating further sedimentation above the settling element 41.

[0036] As a preferred embodiment of the implementation method, such as Figure 3 As shown, the flow stabilizer 423 includes a flow stabilizer blade extending radially along the flow guide hole 421. The flow-facing surface 424 of the flow stabilizer blade has an angle α with a plane perpendicular to the axis of the flow guide hole 421. The value of α is in the range of 15°≤α≤30°.

[0037] By setting the flow stabilizer blades to extend radially along the guide hole 421, and setting the flow-facing surface 424 to form an angle α with the plane perpendicular to the axis of the guide hole 421, this angle avoids the direct obstruction of the liquid by the horizontal blades, which would cause turbulence. Instead, it uses the lateral component of the inclined flow-facing surface 424 to gradually dissolve the residual small amount of disordered vortices in the liquid, guiding the liquid into a stable laminar flow that rises steadily along the axis of the guide hole 421. At the same time, the stepped resistance regulation formed by multiple flow stabilizers along the axis can gradually reduce the rising speed of the liquid along the path, avoiding the flow field disturbance caused by sudden changes in flow velocity. Ultimately, the liquid rises steadily in a laminar state to the top of the settling member 41, providing a stable fluid basis for the sedimentation of the slurry above the settling member 41.

[0038] As a preferred embodiment of this application, as shown in the second example Figure 3 As shown, the upper surface of the settling member 41 is also provided with a flow guide 5. The flow guide 5 is located above the flow guide hole 421 and is connected to the flow guide hole 421. The flow guide 5 is provided with a flow guide hole 51 that is connected to the flow guide hole 421.

[0039] The guide member 5 is designed to directly receive the liquid flowing out of the guide hole 421. Through its internal guide hole 51, the liquid is smoothly transported along a preset path to the upper surface of the settling member 41, avoiding splashing and impact that may occur when the liquid is directly ejected from the orifice. This achieves a smooth transition from the guide hole 421 to the surface of the settling member 41, creating stable initial conditions for subsequent settling and separation. The protruding guide member 5 guides the liquid to a specific area (usually the central area) on the upper surface of the settling member 41, and then the liquid spreads evenly from the center outwards, ensuring that the liquid can uniformly cover the entire surface of the settling member 41.

[0040] As a preferred embodiment of this application, such as Figure 1 , Figure 2 As shown, the main body 1 is provided with a liquid inlet pipe 13, which extends at least partially into the receiving cavity 2, and the end of the liquid inlet pipe 13 is provided with a liquid inlet 11.

[0041] By setting the inlet pipe 13 to extend into the receiving cavity 2, the direct impact of the inlet pipe on the inner wall of the receiving cavity 2 can be avoided, which can cause disordered rebound turbulence. The slurry is directionally transported to the area above the inverted conical guide seat 3 through the end inlet 11, so that the slurry can directly enter the inverted conical guide seat 3 and reduce the diffusion loss of the slurry in non-target areas. At the same time, the directional transport effect of the inlet 11 allows the slurry to contact the inverted conical guide seat 3 in a more concentrated and uniform initial state, thereby improving the guiding effect of the inverted conical guide seat 3.

[0042] Furthermore, such as Figure 1 , Figure 2 As shown, the axis of the liquid inlet 11 is at an angle β with the vertical direction, and the value of β is in the range of 10°≤β≤20°.

[0043] By setting the included angle β, when the slurry flows out from the inlet 11, it forms a directional flow trajectory that is obliquely downward and close to the inner wall of the inverted conical guide seat 3. This guides the slurry to slide smoothly down the inner wall of the inverted conical guide seat 3. With the convergence effect of the inverted conical structure, a spiral upward trend is naturally formed. This avoids direct collision between the slurry and the guide component 42, and lays the foundation for the subsequent guide surface 422 to guide the rotating flow field.

[0044] As a preferred embodiment of this application, such as Figure 1 , Figure 2 As shown, the inverted conical guide seat 3 includes an inverted conical guide cavity 31 and a guide plate 32 disposed on the inner wall of the guide cavity 31. The guide cavity 31 is connected to the receiving cavity 2.

[0045] By setting the guide plate 32, the plate body of the guide plate 32 is equivalent to forming a buffer medium between the slurry and the cavity wall. The slurry first contacts the guide plate 32 instead of directly impacting the cavity wall. The plate body can convert the vertical impact of the slurry into a lateral force that slides along the plate body, greatly dispersing the impact energy and avoiding long-term impact that causes wear on the wall surface of the guide cavity 31.

[0046] Furthermore, the bottom of the guide cavity 31 is provided with a discharge port 33, and the guide plate 32 is provided with a spiral guide protrusion (not shown in the attached figure).

[0047] By setting a discharge port 33 at the bottom of the guide cavity 31, it is convenient for operators to remove the accumulated sediment particles in the guide cavity 31, thereby improving the removal efficiency. By setting a flow guide protrusion, the flow guide protrusion improves the guiding ability of the slurry. The spiral design can drive the slurry to form a stable rotating flow field, providing a more orderly fluid basis for subsequent cooperation with the flow guide 42.

[0048] As a preferred embodiment of this application, such as Figure 2 , Figure 3As shown, the flow guide 42 includes multiple guides 425, each guide 425 having a flow guide surface 422, which is arc-shaped. The multiple guides 425 are connected sequentially along the circumference of the flow guide hole 421 and arranged in a circular array along the circumference of the flow guide 42. The flow guide surfaces 422 of each guide 425 are connected to form a continuous flow guide surface.

[0049] By setting a guide surface, the slurry maintains its rotational kinetic energy by contacting the guide surface during its upward rotation. The guide surface does not generate reverse resistance in the direction of rotation; instead, it guides the slurry to flow smoothly in the direction of rotation through the forward support of the arc surface, reducing energy loss during the rotation process and ensuring that the slurry maintains a stable rotational state during its upward movement, thereby improving the sedimentation efficiency of the slurry during rotation.

[0050] As a preferred embodiment 2 under implementation method 5, such as Figure 3 As shown, two adjacent guide members 425 are connected by an elastic seal (not shown in the figure). The guide member 42 also includes a support member 426. The guide hole 421 is disposed on the support member 426. One end of the guide member 425 is movably disposed on the support member 426 via a first moving member 427, and the other end is movably disposed on the settling member 41 via a second moving member 411. The guide member 425 is rotatably connected to the first moving member 427 and the second moving member 411 respectively. The first moving member 427 moves axially along the guide hole 421, and the second moving member 411 moves radially along the settling member 41.

[0051] By setting a first moving part 427 and a second moving part 411, when the first moving part 427 moves axially closer to or away from the inverted conical guide seat 3, it will drive the end of the guide part 425 to move axially synchronously. At the same time, the second moving part 411 moves radially closer to or away from the center of the guide hole 421, which can pull the other end of the guide part 425 to move radially. Under the linkage of the two, the tilt angle of the guide part 425 changes, thereby making the angle between the guide surface formed by the connection of multiple guide parts 425 and the axis of the guide hole 421 continuously adjustable, so that the crystallization device can adapt to different working conditions. For example, when processing high viscosity slurry, the angle can be increased to slow down the upward speed of the slurry and avoid the attenuation of rotational kinetic energy due to high viscosity; when processing low viscosity slurry, the angle can be appropriately reduced to enhance rotational guidance and prevent the slurry from deviating from the rotation trajectory due to excessive fluidity.

[0052] Furthermore, the guide member 42 also includes a first driving member 413 that drives the first moving member 427 and a second driving member 429 that drives the second moving member 411 to move. The settling member 41 is provided with a second guide groove 428, and the support member 426 is provided with a first guide groove 412. The first moving member 427 is movably disposed in the first guide groove 412, and the second moving member 411 is movably disposed in the second guide groove 428.

[0053] Those skilled in the art will understand that the guide member 42 can also be integrally formed, in the shape of a boss, with a guide hole 421 at its center. This application does not limit the driving method of the first driving member 413; it can have a telescopic rod connected to the first moving member 427, or the output shaft of the first driving member 413 can have a threaded rod, and the first moving member 427 can have a threaded hole that mates with the threaded rod, etc. The arrangement of the second driving member 429 and the second moving member 411 is the same as that of the first driving member 413 and the first moving member 427, and will not be described again in this application.

[0054] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0055] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0056] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A crystallization apparatus, characterized in that, The device includes a main body with an internal cavity. The bottom of the main body has an inverted conical flow guide seat. Above the inverted conical flow guide seat, the main body has a liquid inlet, and at its upper part, a liquid outlet. A flow guide assembly is disposed between the liquid inlet and the liquid outlet. The flow guide assembly includes a settling member and a flow guide located at the bottom of the settling member. The flow guide protrudes towards the inverted conical flow guide seat and has a flow guide hole extending through the settling member. The flow guide also has a flow guide surface circumferentially arranged around the flow guide hole, which is located in the central region of the cavity.

2. The crystallization apparatus according to claim 1, characterized in that, The flow guide hole is provided with multiple flow stabilizers, which are arranged sequentially at intervals along the axial direction of the flow guide hole.

3. A crystallization apparatus according to claim 2, characterized in that, The flow stabilizer extends radially along the guide hole, and the flow-facing surface of the flow stabilizer has an angle α with a plane perpendicular to the axis of the guide hole, where the value of α is in the range of 15°≤α≤30°.

4. A crystallization apparatus according to claim 1, characterized in that, The upper surface of the settling member is also provided with a flow guide, which is located above the flow guide hole and connected to the flow guide hole. The flow guide has a flow guide hole that is corresponding to and communicates with the flow guide hole.

5. A crystallization apparatus according to claim 1, characterized in that, The main body is provided with a liquid inlet pipe, which extends at least partially into the receiving cavity, and the end of the liquid inlet pipe is provided with the liquid inlet.

6. A crystallization apparatus according to claim 2, characterized in that, The axis of the liquid inlet is at an angle β with the vertical direction, and the value of β is in the range of 10°≤β≤20°.

7. A crystallization apparatus according to claim 1, characterized in that, The inverted conical guide seat includes an inverted conical guide cavity and a guide plate disposed on the inner wall of the guide cavity.

8. A crystallization apparatus according to claim 7, characterized in that, The bottom of the guide cavity is also provided with a discharge port, and the guide plate is provided with a spiral guide protrusion.

9. A crystallization apparatus according to claim 1, characterized in that, The flow guide includes multiple guides, each of which has a flow guide surface. The flow guide surface is arc-shaped. The multiple guides are connected sequentially along the circumference of the flow guide hole and arranged in a circular array along the circumference of the flow guide. The flow guide surfaces of each guide are connected to form a continuous flow guide surface.

10. A crystallization apparatus according to claim 9, characterized in that, The two adjacent guide members are connected by an elastic seal. The guide member also includes a support member. The guide hole is disposed on the support member. One end of the guide member is movably disposed on the support member via a first moving member, and the other end is movably disposed on the settling member via a second moving member. The guide member is rotatably connected to the first moving member and the second moving member respectively. The first moving member moves axially along the guide hole, and the second moving member moves radially along the settling member.

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