Rapid mixing continuous reaction crystallizer

Abstract

The utility model discloses a rapid mixing continuous reaction crystallizer, which relates to the technical field of crystallization equipment, and comprises a crystallizer main body, a guide cylinder, an axial flow stirrer and a guide cylinder jacket, a reaction cavity is arranged in the crystallizer main body, a first feed port is arranged at the bottom of the crystallizer main body, and a second feed port is arranged at the top of the crystallizer main body; the two ends of the guide cylinder are open, the guide cylinder is located in the reaction cavity and is coaxial with the crystallizer body, and the first feeding port communicates with the interior of the guide cylinder; the axial flow stirrer enters the guide cylinder from the bottom of the crystallizer main body and rotates in the guide cylinder; the guide cylinder jacket is coaxially sleeved outside the guide cylinder and keeps a certain distance from the outer wall of the guide cylinder to form a clamping cavity, and a thermal medium circulates in the clamping cavity; a material outlet is formed in the bottom of the crystallizer body. The utility model solves the technical problems in the prior art that the phenomena of wrapping and scabbing occur in the crystallization reaction, and the reaction is discontinuous, low in efficiency, unstable and insufficient.

Description

Technical Field

[0001] The utility model belongs to the technical field of crystallization equipment, and particularly relates to a rapid mixing continuous reaction crystallizer. Background Art

[0002] A crystallizer is a device commonly used in industries such as chemical engineering and pharmaceuticals for the reactants to contact and react to precipitate crystals. In the existing crystallizer, generally, a feed inlet is provided at the top and / or bottom of the device, a discharge outlet is provided at the bottom, and a rotating stirrer is provided inside the device. After the reactants are put into the device through the feed inlet, they are stirred by the stirrer to make the reactants contact and react. However, when this crystallizer is in use, whether the reactants are concentrated and put into the device in the same direction or dispersed and put into the device in different directions, only relying on the flow field generated by the rotation of the stirrer to make the reactants rotate together, the dispersion speed of the reactants is not fast enough, the uniformity among the reactants is insufficient, and the contact is not sufficient, resulting in poor crystallization effect, low crystallization efficiency, and easy occurrence of phenomena such as scaling on the inner wall of the device and crystallization encapsulation, which affects the crystallization yield. Summary of the Utility Model

[0003] The utility model provides a rapid mixing continuous reaction crystallizer to solve the technical problems of wrapping, scaling, discontinuous reaction, low efficiency, instability, and insufficiency in the existing crystallization reaction.

[0004] The utility model provides a rapid mixing continuous reaction crystallizer, adopting the following technical solutions:

[0005] A rapid mixing continuous reaction crystallizer, comprising:

[0006] A crystallizer main body, having a reaction chamber inside the crystallizer main body, a first feed inlet provided at the bottom of the crystallizer main body, and a second feed inlet provided at the top;

[0007] A draft tube, with both ends of the draft tube open, the draft tube being located inside the reaction chamber and coaxially arranged with the crystallizer main body, and the first feed inlet being communicated to the inside of the draft tube;

[0008] An axial flow stirrer, entering the inside of the draft tube from the bottom of the crystallizer main body and rotating inside the draft tube;

[0009] A draft tube jacket, coaxially sleeved outside the draft tube, and maintaining a certain distance from the outer wall of the draft tube to form a jacket cavity, and a heat medium flowing through the jacket cavity;

[0010] Reactant a enters the draft tube through the first feed inlet, is stirred by the axial flow stirrer and sent to the top of the reaction chamber, and reactant b enters the reaction chamber through the second feed inlet and fully contacts reactant a sent to the top of the reaction chamber.

[0011] Preferably, an outer half pipe is wound around the outer wall of the crystallizer body. The outer half pipe includes an inlet end and an outlet end, and the outer half pipe is communicated with the clamping cavity through a pipeline.

[0012] Preferably, a material disperser is arranged at the top of the crystallizer body. The material disperser is communicated with the second feed inlet and is used for uniformly dispersing the reactant b.

[0013] Preferably, a material outlet is arranged at the bottom of the crystallizer body for discharging crystals.

[0014] Preferably, a temperature monitoring system is arranged in the middle and lower parts of the crystallizer body.

[0015] Preferably, a liquid level monitoring system is arranged at the top of the crystallizer body.

[0016] Preferably, a mechanical seal is arranged at the connection between the shaft rod of the axial flow agitator and the crystallizer body.

[0017] Preferably, a maintenance flange is arranged at the bottom of the crystallizer body, and the shaft rod of the axial flow agitator passes through the maintenance flange to connect the driving mechanism.

[0018] Preferably, a support seat is arranged in the middle of the outer wall of the crystallizer body.

[0019] The beneficial effects of the present utility model:

[0020] The crystallizer of the present utility model realizes rapid dispersion and circulation of reactants by arranging a draft tube and adopting a large-flow axial flow agitator in the draft tube, improving the effect and efficiency of reaction crystallization; adopting the method of dispersing and feeding at the bottom and top feed inlets, enabling the two reactants to be quickly mixed and fully reacted, and then through the draft tube jacket and outer half pipe into which a heat medium is introduced, under the combined heat exchange effect of the two, the reaction products are desupersaturated and grown to obtain the final crystals. The temperature of the heat medium in the outer half pipe and the clamping cavity can be regulated to maintain a constant temperature environment inside the reaction cavity, making the reactants purer, the reaction more efficient, and avoiding the generation of crystal wrapping and scaling phenomena during the reaction. Moreover, the first feed inlet at the bottom and the second feed inlet at the top of the crystallizer of the present utility model continuously and quantitatively input new materials, and the crystals obtained by the reaction are continuously discharged through the material outlet, ensuring the continuous operation of reaction crystallization and greatly improving the production efficiency. Description of the Drawings

[0021] For ease of explanation, the present utility model is described in detail by the following specific embodiments and drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of this embodiment (the arrow direction in the figure indicates the flow direction of the reactants inside the reaction cavity).

[0023] In the figure:

[0024] 10 - Crystallizer body; 101 - Reaction chamber; 102 - First feed inlet; 103 - Second feed inlet; 104 - Logistics outlet; 105 - Mechanical seal; 106 - Maintenance flange; 107 - Support seat; 20 - Draft tube; 30 - Axial flow agitator; 40 - Draft tube jacket; 401 - Jacket cavity; 50 - Outer half pipe; 60 - Material disperser; 70 - Temperature monitoring system; 80 - Liquid level monitoring system; 90 - Driving mechanism. Specific embodiments

[0025] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments; in the following description, providing specific details such as specific configurations and components is only to help a comprehensive understanding of the embodiments of the present invention. Therefore, those skilled in the art should clearly understand that various changes and modifications can be made to the embodiments described here without departing from the scope and spirit of the present invention. In addition, descriptions of known functions and structures are omitted for clarity and conciseness.

[0026] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0027] As Figure 1 shown, a rapid mixing continuous reaction crystallizer provided in this embodiment includes: a crystallizer body 10, a draft tube 20, an axial flow agitator 30, and a draft tube jacket 40. The crystallizer body 10 has a reaction chamber 101 inside, a first feed inlet 102 is provided at the bottom of the crystallizer body 10, and a second feed inlet 103 is provided at the top; both ends of the draft tube 20 are open, the draft tube 20 is located inside the reaction chamber 101 and is coaxially arranged with the crystallizer body 10, and the first feed inlet 102 communicates with the inside of the draft tube 20; the axial flow agitator 30 enters the inside of the draft tube 20 from the bottom of the crystallizer body 10 and rotates inside the draft tube 20; the draft tube jacket 40 is coaxially sleeved outside the draft tube 20 and maintains a certain distance from the outer wall of the draft tube 20 to form a jacket cavity 401, and a heat medium flows through the jacket cavity 401; a material outlet 104 is provided at the bottom of the crystallizer body 10.

[0028] Specifically, the first feed inlet 102 of this embodiment is used to feed reactant a, the second feed inlet 103 is used to feed reactant b, the reaction chamber 101 serves as the space for the contact reaction between reactant a and reactant b, an axial flow agitator 30 is arranged inside the draft tube 20, serving as the channel for the axial flow agitator 30 to convey reactant a to the top of the reaction chamber 101, the heat medium introduced into the inner cavity 401 of the draft tube jacket 40 is used to accelerate the diffusion of reactant a during the conveying process, and the material outlet 104 is used to discharge the crystals obtained after the reaction. When the crystallizer of this embodiment is in use, reactant a directly enters the inside of the draft tube 20 through the first feed inlet 102, and is quickly dispersed by the rotation of the axial flow agitator 30 with a large flow rate, and is quickly sent to the top of the reaction chamber 101 through the draft tube 20. At the same time, introducing the heat medium into the cavity 401 can accelerate the diffusion of the reactant; then reactant b is fed through the second feed inlet 103 and comes into full contact with reactant a sent to the top of the reaction chamber 101, realizing the process of uniform, rapid and stable reaction of the two materials; the reaction products descend through the space between the draft tube 20 and the reaction chamber 101 under the action of the flow field and gravity. At the same time, under the heat exchange action of the internal heat medium of the draft tube jacket 40, the supersaturation is gradually eliminated and grows. The unreacted materials and fine particles enter the draft tube 20 again through the opening below the draft tube 20 at the bottom of the reaction chamber 101 under the stirring action and participate in the reaction again, ensuring the full and complete reaction, and at the same time ensuring the stability of the crystal particle size. The crystals with the completed particle size are deposited at the bottom of the reaction chamber 101 and discharged through the material outlet 104. The reactants are under the flow field of the draft tube and the axial flow agitator, and the heat exchange action of the draft tube jacket can avoid the generation of crystal wrapping and scaling phenomena during the reaction process. The new materials are continuously and quantitatively fed through the first feed inlet 102 at the bottom and the second feed inlet 103 at the top, and the crystals are continuously discharged through the material outlet 104, ensuring the continuous operation of the reaction crystallization and greatly improving the production efficiency. In addition, the inner wall of the crystallizer body 10 of this embodiment is polished, which can further avoid the generation of scaling phenomena.

[0029] In this embodiment, an outer half pipe 50 is surrounded around the outer wall of the crystallizer body 10. The outer half pipe 50 includes an inlet end and an outlet end, and the outer half pipe 50 is communicated with the cavity 401 through a pipeline. Specifically, the heat medium enters from the inlet end of the outer half pipe 50, flows inside the outer half pipe 50, and enters the cavity 401 through the pipeline, and flows to the outlet end of the outer half pipe 50, so that the outer half pipe 50 and the cavity 401 are filled with the heat medium. Thus, the reaction products eliminate supersaturation and grow under the combined heat exchange action of the outer half pipe 50 and the draft tube jacket 40 to obtain the final crystals; and by regulating the temperature of the heat medium in the outer half pipe 50 and the cavity 401, the constant temperature environment inside the reaction chamber 401 is maintained, making the reactants purer and the reaction more efficient.

[0030] In this embodiment, a material disperser 60 is provided at the top of the crystallizer body 10. The material disperser 60 is communicated with the second feed inlet 103. The reactant b enters the material disperser 60 from the second feed inlet 103. For example, the material disperser 60 can be a spray pipeline, so that the reactant b is more evenly dispersed in the reaction chamber 101, which is beneficial to the contact reaction between the reactants.

[0031] In this embodiment, a temperature monitoring system 70 is provided in the middle and lower part of the crystallizer body 10, and a liquid level monitoring system 80 is provided at the top of the crystallizer body 10, which is used to monitor the temperature and liquid level inside the reaction chamber 101 in real time, so as to continuously adjust and control the reaction to ensure the stable progress of the reaction process.

[0032] In this embodiment, a mechanical seal 105 is provided at the connection between the shaft rod of the axial flow stirrer 30 and the crystallizer body 10 to prevent the reactants from leaking and ensure the stability of the crystallizer body 10.

[0033] In this embodiment, a maintenance flange 106 is provided at the bottom of the crystallizer body 10. The shaft rod of the axial flow stirrer 30 passes through the maintenance flange 106 to connect the driving mechanism 90. The maintenance flange 106 is used to fixedly support the driving mechanism 90. The maintenance flange 106 is detachable, which is convenient for the maintenance of the axial flow stirrer 30. The driving mechanism 90 serves as a power source to drive the axial flow stirrer 30 to rotate. Specifically, the driving mechanism can be composed of a driving motor connected to a transmission mechanism, and the transmission mechanism is connected to the shaft rod of the axial flow stirrer, so as to realize the rotation of the axial flow stirrer.

[0034] In this embodiment, a support seat 107 is provided in the middle of the outer wall of the crystallizer body 10, and the crystallizer is installed and fixed at a designated position through the support seat 107.

[0035] The crystallizer of the present utility model realizes the rapid dispersion and circulation of the reactants by setting the draft tube 20 and adopting a large-flow axial flow stirrer 30 inside the draft tube 20, improving the effect and efficiency of reaction crystallization; adopting the method of dispersing and feeding through the bottom and top feed inlets, enabling the two reactants to be quickly mixed and fully reacted. By setting the draft tube jacket 40 and the outer half pipe 50 for introducing the heat medium, the reaction products are desupersaturated and grown under the combined heat exchange action of the two, and the final crystals are obtained. The temperature of the heat medium in the outer half pipe 50 and the clamping cavity 401 can be regulated to maintain a constant temperature environment inside the reaction chamber, making the reactants purer, the reaction more efficient, and avoiding the generation of crystallization wrapping and scaling phenomena during the reaction process.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

Claims

1. A rapid mixing continuous reaction crystallizer, characterized in that, Including: A crystallizer main body (10), within which there is a reaction chamber (101). At the bottom of the crystallizer main body (10), there is a first feed inlet (102), and at the top, there is a second feed inlet (103). A draft tube (20) with openings at both ends. The draft tube (20) is located within the reaction chamber (101) and is coaxially arranged with the crystallizer main body (10). The first feed inlet (102) is connected to the interior of the draft tube (20). An axial flow stirrer (30) that enters the interior of the draft tube (20) from the bottom of the crystallizer main body (10) and rotates within the draft tube (20). A draft tube jacket (40) coaxially sleeved outside the draft tube (20), maintaining a certain distance from the outer wall of the draft tube (20) to form a jacket cavity (401), through which a heat medium flows. Reactant a enters the draft tube (20) through the first feed inlet (102) and is sent to the top of the reaction chamber (101) by the agitation of the axial flow stirrer (30). Reactant b enters the reaction chamber (101) through the second feed inlet (103) and comes into full contact with reactant a sent to the top of the reaction chamber (101).

2. The rapid mixing continuous reaction crystallizer according to claim 1, characterized in that, An outer half pipe (50) surrounds the outer wall of the crystallizer main body (10). The outer half pipe (50) includes an inlet end and an outlet end, and is connected to the jacket cavity (401) through a pipeline.

3. A rapid mixing continuous reaction crystallizer according to claim 1, characterized in that, A material distributor (60) is provided at the top of the crystallizer main body (10). The material distributor (60) is connected to the second feed inlet (103) and is used to uniformly disperse reactant b.

4. A rapid mixing continuous reaction crystallizer according to claim 1, wherein A material outlet (104) is provided at the bottom of the crystallizer main body (10) for discharging crystals.

5. A rapid mixing continuous reaction crystallizer according to claim 1, wherein A temperature monitoring system (70) is provided in the middle and lower part of the crystallizer main body (10).

6. The rapid mixing continuous reaction crystallizer according to claim 1, wherein, A liquid level monitoring system (80) is provided at the top of the crystallizer main body (10).

7. A rapid mixing continuous reaction crystallizer according to claim 1, characterized in that, A mechanical seal (105) is provided at the connection between the shaft rod of the axial flow stirrer (30) and the crystallizer main body (10).

8. A rapid mixing continuous reaction crystallizer according to claim 1, characterized in that, An inspection flange (106) is provided at the bottom of the crystallizer main body (10). The shaft rod of the axial flow stirrer (30) passes through the inspection flange (106) to connect to a driving mechanism (90).

9. A rapid mixing continuous reaction crystallizer according to claim 1, characterized in that, A support seat (107) is provided in the middle of the outer wall of the crystallizer main body (10).

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