Static melt crystallizer for rapid purification

Abstract

The utility model provides a static melt crystallizer for rapid purification, which belongs to the technical field of chemical separation, and comprises a crystallization box, a crystallization plate group and an ultrasonic vibration plate, the crystallization box is provided with a crystallization cavity, a material feeding pipe and a material discharging pipe, the material feeding pipe and the material discharging pipe are both communicated with the crystallization cavity, the crystallization plate set is located in the crystallization cavity and comprises a plurality of heat exchange plates, the heat exchange plates are arranged at intervals, each heat exchange plate is provided with a heat exchange cavity, the crystallization box is provided with a heat exchange inlet pipe and a heat exchange outlet pipe, and the heat exchange cavity of each heat exchange plate is communicated with the heat exchange inlet pipe and the heat exchange outlet pipe. The ultrasonic vibration plate is fixedly arranged in the crystallization box and is positioned in the crystallization cavity. The static melt crystallizer for rapid purification can increase the crystallization rate and improve the crystallization quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical separation, and particularly relates to a static melting crystallizer for rapid purification. Background Technique

[0002] In the rapid development process of the chemical industry, carbon dioxide emissions have also skyrocketed. The zero-carbon transformation of the Chinese chemical industry is crucial for the country to achieve the carbon neutrality goal and is also of great significance for the low-carbon transformation of the global chemical value chain. In the energy consumption structure of the chemical process, separation accounts for 80%. Especially in the separation of high-purity chemicals in the fields of electronic chemicals and new materials, there are bottlenecks of high energy consumption and great technical difficulty. In the context of the carbon neutral era of the chemical industry, the green and low-carbon separation technology - melting crystallization, is a very good technical choice.

[0003] In recent years, many researchers at home and abroad have done a lot of work in this regard, and some of them have been applied to industrial production. Due to its high efficiency and low energy consumption, the melting crystallization technology has been widely used in the separation and purification of chemical and pharmaceutical products. Especially with the continuous development of new melting crystallization technologies, it will surely lead to a comprehensive upgrade of industrial separation technologies. By introducing a fine crystal elimination device on the basis of the original suspension melting crystallization equipment and drawing on the solution crystallization technology, products with better quality can be obtained. These new technologies have made great improvements on the basis of conventional crystallization equipment, further broadening the separation systems and greatly increasing the separation effect, thus better reflecting the unique separation advantages of melting crystallization compared with other separation operations.

[0004] The melting crystallization process can be divided into three processes: crystallization, sweating, and melting. Generally, by controlling the temperature of the refrigerant medium, the high-melting-point components in the raw material liquid are first crystallized out to form a crystal layer with a lower mass fraction of impurities than the initial raw material liquid. Then, by controlling the temperature of the heating medium, the crystal layer is gradually heated, and the crystals with higher impurity content are preferentially melted. Finally, all the crystals are melted to obtain the purified product. The melting crystallization or melting crystallization coupling technology solutions can achieve the separation of high-purity substances, energy conservation and emission reduction, improvement of product benefits, and flexible adjustment of product grades. Therefore, melting crystallizers have been widely used in industrial production.

[0005] However, the crystallization rates of existing melting crystallizers are generally not high, and the crystallization quality is not high enough. Therefore, there is an urgent need for a melting crystallizer that can improve the crystallization rate and crystallization quality to achieve rapid purification. Content of the Utility Model

[0006] In view of this, in order to solve the problems that the crystallization rates of existing melting crystallizers are generally not high and the crystallization quality is not high enough, the utility model proposes a static melting crystallizer for rapid purification.

[0007] To achieve the above object, the present utility model adopts the following technical solutions:

[0008] A static melting crystallizer for rapid purification, comprising:

[0009] A crystallization box having a crystallization cavity, the crystallization box is provided with a material inlet pipe and a material outlet pipe, and both the material inlet pipe and the material outlet pipe communicate with the crystallization cavity;

[0010] A crystallization plate group located in the crystallization cavity, the crystallization plate group includes a plurality of heat exchange plates, the plurality of heat exchange plates are arranged at intervals, the heat exchange plate is provided with a heat exchange cavity, the crystallization box is provided with a heat exchange inlet pipe and a heat exchange outlet pipe, and the heat exchange cavity of each heat exchange plate communicates with the heat exchange inlet pipe and the heat exchange outlet pipe;

[0011] An ultrasonic vibration plate fixedly arranged on the crystallization box and located in the crystallization cavity.

[0012] As a preferred scheme of the above-mentioned static melting crystallizer for rapid purification, both opposite sides of the heat exchange plate are provided with a plurality of stamping recessed grooves, the plurality of stamping recessed grooves are arranged at intervals, and the stamping recessed grooves are recessed towards the heat exchange cavity.

[0013] As a preferred scheme of the above-mentioned static melting crystallizer for rapid purification, the crystallization plate group further includes a plurality of baffle plate groups, one baffle plate group is arranged between two heat exchange plates, the baffle plate group includes a plurality of first baffle plates, the plurality of first baffle plates are arranged at intervals, and two ends of the first baffle plate are respectively fixedly connected to adjacent two heat exchange plates, and the first baffle plate is inclined relative to the heat exchange plate.

[0014] As a preferred scheme of the above-mentioned static melting crystallizer for rapid purification, a plurality of second baffle plates are fixedly arranged in the heat exchange cavity of the heat exchange plate, and the plurality of second baffle plates are arranged in a staggered manner up and down.

[0015] As a preferred scheme of the above-mentioned static melting crystallizer for rapid purification, the static melting crystallizer for rapid purification further includes a first temperature sensor and a second temperature sensor, the first temperature sensor is arranged on the heat exchange inlet pipe, and the second temperature sensor is arranged on the heat exchange outlet pipe.

[0016] As a preferred scheme of the above-mentioned static melting crystallizer for rapid purification, the static melting crystallizer for rapid purification further includes a jacket, the jacket surrounds the crystallization box, the jacket is provided with a heat preservation cavity, a jacket inlet pipe, a jacket outlet pipe and a jacket discharge pipe, and the jacket inlet pipe, the jacket outlet pipe and the jacket discharge pipe all communicate with the heat preservation cavity.

[0017] As a preferred embodiment of the above-mentioned static melting crystallizer for rapid purification, the jacket inlet pipe and the jacket discharge pipe are located below the heat preservation cavity, and the jacket outlet pipe is located above the heat preservation cavity.

[0018] As a preferred embodiment of the above-mentioned static melting crystallizer for rapid purification, the material feed pipe is located above the crystallization cavity, and the material discharge pipe is located below the crystallization cavity.

[0019] As a preferred embodiment of the above-mentioned static melting crystallizer for rapid purification, a sight glass is provided on the side wall of the crystallization box, and the crystallization cavity can be seen through the sight glass.

[0020] As a preferred embodiment of the above-mentioned static melting crystallizer for rapid purification, the static melting crystallizer for rapid purification further includes an outer box body. The crystallization box is placed inside the outer box body. The outer box body is provided with an opening through which the sight glass can be seen. Casters are provided below the outer box body, and a paperless recorder is provided on the side wall of the outer box body.

[0021] Compared with the prior art, the beneficial effects of a static melting crystallizer for rapid purification provided by the present invention are as follows:

[0022] 1. The present invention provides a static melting crystallizer for rapid purification. An ultrasonic vibration plate is provided in the static melting crystallizer for rapid purification. The ultrasonic vibration plate is arranged in the crystallization cavity. The vibration of the ultrasonic vibration plate can accelerate the molecular movement, increase the diffusion rate of the solute in the solution, and thus promote the deposition of the solute from the solution to the crystal surface. This helps to improve the crystal growth rate and increase the grain size. Moreover, by adjusting the frequency and amplitude of the vibration, the internal structure and defect distribution of the crystal can be affected. Appropriate vibration conditions help to reduce the defects inside the crystal and improve the quality of the crystal. Appropriate vibration can help control the crystal growth direction and rate, and to a certain extent, the vibration can improve the crystallization rate and accelerate the transformation process of the molten material from the liquid state to the solid state. The static melting crystallizer for rapid purification can improve the crystallization rate and the crystallization quality.

[0023] 2. The present invention provides a static melting crystallizer for rapid purification. A plurality of stamping recessed grooves are provided on both opposite sides of the heat exchange plate. The plurality of stamping recessed grooves are arranged at intervals, and the stamping recessed grooves are recessed towards the heat exchange cavity. The heat exchange plate is stamped to form a plurality of stamping recessed grooves on both opposite sides of the heat exchange plate. The stamping recessed grooves on both opposite sides of the heat exchange plate are recessed towards the heat exchange cavity, making the heat exchange plate in a pillow shape, which can make it easier for the material to hang on the heat exchange plate during crystallization.

[0024] 3. The present utility model provides a static melting crystallizer for rapid purification. In this static melting crystallizer for rapid purification, the crystallizing plate group further includes a plurality of baffle groups. One baffle group is arranged between two heat exchange plates. The baffle group includes a plurality of first baffle plates which are arranged at intervals. The two ends of each first baffle plate are fixedly connected to the adjacent two heat exchange plates respectively, and the first baffle plate is inclined relative to the heat exchange plate. The design of the baffle group can force the fluid in the crystallization cavity to be turbulent, improve the heat exchange efficiency, and make the arrangement of the heat exchange temperature field more uniform, realizing uniform temperature control in the true sense. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0026] Figure 1 is a cross-sectional view of the static melting crystallizer for rapid purification provided by a specific embodiment of the present utility model along the first direction;

[0027] Figure 2 is a cross-sectional view of the static melting crystallizer for rapid purification provided by a specific embodiment of the present utility model along the second direction;

[0028] Figure 3 is Figure 2 an enlarged view of part A in

[0029] Figure 4 is a schematic structural view of the crystallization tank of the static melting crystallizer for rapid purification provided by a specific embodiment of the present utility model;

[0030] Figure 5 is a schematic structural view of the static melting crystallizer for rapid purification provided by a specific embodiment of the present utility model.

[0031] In the figures:

[0032] 1. Crystallization tank; 11. Crystallization cavity; 12. Material feed pipe; 13. Material discharge pipe;

[0033] 2. Heat exchange plate; 21. Stamped depression groove; 22. Second baffle plate; 23. Heat exchange inlet pipe; 24. Heat exchange outlet pipe; 25. Heat exchange cavity;

[0034] 3. First baffle plate;

[0035] 4. Ultrasonic vibration plate;

[0036] 51. Heat preservation cavity; 52. Jacket inlet pipe; 53. Jacket outlet pipe; 54. Jacket discharge pipe;

[0037] 6. Sight glass;

[0038] 7. First temperature sensor;

[0039] 8. Second temperature sensor;

[0040] 9. Outer box; 91. Opening; 92. Caster; 93. Paperless recorder. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0042] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below", and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0044] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description and simplifying the operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0045] See Figures 1-5To describe this embodiment, the present utility model provides a static melting crystallizer for rapid purification. The static melting crystallizer for rapid purification includes a crystallization tank 1, a crystallization plate group, and an ultrasonic vibration plate 4. The crystallization tank 1 has a crystallization chamber 11. The crystallization tank 1 is provided with a material feed pipe 12 and a material discharge pipe 13. Both the material feed pipe 12 and the material discharge pipe 13 are communicated with the crystallization chamber 11. The crystallization plate group is located in the crystallization chamber 11. The crystallization plate group includes a plurality of heat exchange plates 2. The plurality of heat exchange plates 2 are arranged at intervals. The heat exchange plate 2 is provided with a heat exchange chamber 25. The crystallization tank 1 is provided with a heat exchange inlet pipe 23 and a heat exchange outlet pipe 24. The heat exchange chamber 25 of each heat exchange plate 2 is communicated with the heat exchange inlet pipe 23 and the heat exchange outlet pipe 24. The ultrasonic vibration plate 4 is fixedly arranged on the crystallization tank 1 and is located in the crystallization chamber 11.

[0046] For the static melting crystallizer for rapid purification, the molten material, that is, the material to be crystallized, will enter the crystallization chamber 11 from the material feed pipe 12 and be discharged from the material discharge pipe 13 when needed. The heat exchange medium enters the heat exchange chambers 25 of the plurality of heat exchange plates 2 from the heat exchange inlet pipe 23 and is discharged from the heat exchange outlet pipe 24. By adjusting the temperature of the heat exchange medium, the molten material in the crystallization chamber 11 can be heated or cooled. The static melting crystallizer separates according to the melting point differences of the main components in the molten material. By gradually reducing the temperature of the heat exchange medium, the molten material statically placed in the crystallization chamber 11 is gradually cooled and crystallized. After the crystallization is completed, the uncrystallized low-concentration residual liquid is discharged. Then, by slowly raising the temperature of the heat exchange medium, the temperature of the crude crystals in the crystallization chamber 11 is slowly increased to make them "sweat". The crystals with higher impurity content will melt first and be discharged, and thus can be further purified. Finally, all the crystals are melted to obtain the purified product. During the crystallization process, as the temperature of the molten material gradually decreases, a certain component is supersaturated in the molten liquid, nucleation begins, and gradually grows into crystals. During the growth process of the crystals, it is inevitable to enclose the impurities in the mother liquor into the crude crystals. Therefore, the crude crystals need to go through the sweating process to be purified. The static melting crystallizer for rapid purification has a low operating temperature and few side reactions, making the purity and energy consumption better than the traditional method.

[0047] And an ultrasonic vibration plate 4 is provided in the static melting crystallizer for rapid purification. The ultrasonic vibration plate 4 is arranged in the crystallization cavity 11. The vibration of the ultrasonic vibration plate 4 can accelerate the molecular movement, increase the diffusion rate of the solute in the solution, and thus promote the deposition of the solute from the solution onto the crystal surface. This helps to increase the crystal growth rate and enlarge the grain size. Moreover, by adjusting the vibration frequency and amplitude, the internal structure and defect distribution of the crystal can be affected. Appropriate vibration conditions help to reduce the defects inside the crystal and improve the crystal quality. Appropriate vibration can help control the crystal growth direction and rate, and to a certain extent, vibration can increase the crystallization rate and accelerate the transformation process of the molten material from the liquid state to the solid state. Thus, the static melting crystallizer for rapid purification can increase the crystallization rate and improve the crystallization quality.

[0048] Optionally, a plurality of stamping recessed grooves 21 are provided on both opposite sides of the heat exchange plate 2. The plurality of stamping recessed grooves 21 are arranged at intervals, and the stamping recessed grooves 21 are recessed towards the heat exchange cavity 25. The heat exchange plate 2 is stamped to form a plurality of stamping recessed grooves 21 on both opposite sides of the heat exchange plate 2. The stamping recessed grooves 21 on both opposite sides of the heat exchange plate 2 are recessed towards the inside of the heat exchange cavity 25, making the heat exchange plate 2 in a pillow shape, which can make it easier for the material to hang on the heat exchange plate 2 during crystallization.

[0049] Optionally, the crystallization plate group further includes a plurality of baffle plate groups. One baffle plate group is arranged between two heat exchange plates 2. The baffle plate group includes a plurality of first baffle plates 3. The plurality of first baffle plates 3 are arranged at intervals. The two ends of the first baffle plate 3 are respectively fixedly connected to the adjacent two heat exchange plates 2. The first baffle plate 3 is inclined relative to the heat exchange plate 2. The design of the baffle plate group can force the fluid in the crystallization cavity 11 to be turbulent, improve the heat exchange efficiency, and make the heat exchange temperature field distribution more uniform, achieving uniform temperature control in the true sense.

[0050] Optionally, a plurality of second baffle plates 22 are fixedly arranged in the heat exchange cavity of the heat exchange plate 2. The plurality of second baffle plates 22 are arranged in a staggered manner up and down. In this embodiment, each heat exchange plate 2 is provided with three second baffle plates 22. One is arranged below the heat exchange cavity and is located in the middle of the other two, and the other two are arranged above the heat exchange cavity. This can make the heat exchange medium cover the entire heat exchange cavity.

[0051] Optionally, the static melting crystallizer for rapid purification further includes a first temperature sensor 7 and a second temperature sensor 8. The first temperature sensor 7 is arranged on the heat exchange inlet pipe 23, and the second temperature sensor 8 is arranged on the heat exchange outlet pipe 24. The first temperature sensor 7 is used to detect the temperature of the heat exchange medium in the heat exchange inlet pipe 23, and the second temperature sensor 8 is used to detect the temperature of the heat exchange medium in the heat exchange outlet pipe 24.

[0052] Optionally, the static melting crystallizer for rapid purification further includes a jacket which surrounds the crystallization tank 1. The jacket is provided with a heat preservation cavity 51, a jacket inlet pipe 52, a jacket outlet pipe 53 and a jacket discharge pipe 54, and the jacket inlet pipe 52, the jacket outlet pipe 53 and the jacket discharge pipe 54 are all communicated with the heat preservation cavity 51. It can be understood that the jacket surrounds the periphery of the jacket. The user can introduce a medium at a certain temperature into the heat preservation cavity 51 from the jacket inlet pipe 52 according to their own experimental needs, and the jacket plays a heat preservation role. The jacket discharge pipe 54 is used to completely discharge the medium after the experiment and other situations.

[0053] Optionally, the jacket inlet pipe 52 and the jacket discharge pipe 54 are located below the heat preservation cavity 51, and the jacket outlet pipe 53 is located above the heat preservation cavity 51. The jacket discharge pipe 54 is at the bottom of the jacket to facilitate the discharge of all the medium. The jacket inlet pipe 52 is located below the heat preservation cavity 51, and the jacket outlet pipe 53 is located above the heat preservation cavity 51, which can make the medium fill the heat preservation cavity 51.

[0054] Optionally, the material feed pipe 12 is located above the crystallization cavity 11, and the material discharge pipe 13 is located below the crystallization cavity 11.

[0055] Optionally, a sight glass 6 is provided on the side wall of the crystallization tank 1, and the crystallization cavity 11 can be seen through the sight glass 6. It is convenient to observe the situation inside the crystallization cavity 11 through the sight glass 6.

[0056] Optionally, the static melting crystallizer for rapid purification further includes an outer box 9. The crystallization tank 1 is placed inside the outer box 9. The outer box 9 is provided with an opening 91, and the sight glass 6 can be seen through the opening 91. Casters 92 are provided below the outer box 9, and a paperless recorder 93 is provided on the side wall of the outer box 9. It is convenient to move and record.

[0057] Obviously, the embodiments of the present utility model disclosed above are only used to help explain the present utility model. The embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical fields can understand and utilize the present utility model well. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A static melt crystallizer for rapid purification, characterized in that: include: A crystallization box (1), wherein the crystallization box (1) has a crystallization chamber (11), and the crystallization box (1) is provided with a material feed pipe (12) and a material discharge pipe (13), and the material feed pipe (12) and the material discharge pipe (13) are both connected to the crystallization chamber (11); A crystallization plate group, the crystallization plate group is located in the crystallization chamber (11), the crystallization plate group comprises a plurality of heat exchange plates (2), the plurality of heat exchange plates (2) are arranged at intervals, the heat exchange plates (2) are provided with a heat exchange chamber (25), the crystallization box (1) is provided with a heat exchange inlet pipe (23) and a heat exchange outlet pipe (24), and the heat exchange chamber (25) of each heat exchange plate (2) is in communication with the heat exchange inlet pipe (23) and the heat exchange outlet pipe (24); An ultrasonic vibration plate (4), wherein the ultrasonic vibration plate (4) is fixedly arranged on the crystallization box (1) and is located in the crystallization chamber (11).

2. The static melt crystallizer for rapid purification according to claim 1, characterized in that: Two opposite sides of the heat exchange plate (2) are provided with a plurality of stamped recessed grooves (21), the plurality of stamped recessed grooves (21) are arranged at intervals, and the stamped recessed grooves (21) are recessed in the direction of the heat exchange cavity (25).

3. The static melt crystallizer for rapid purification according to claim 1, characterized in that: The crystallization plate group also includes a plurality of baffle groups, one baffle group is arranged between two of the heat exchange plates (2), the baffle group includes a plurality of first baffles (3), the plurality of first baffles (3) are arranged at intervals, the two ends of the first baffle (3) are respectively fixedly connected to two adjacent heat exchange plates (2), and the first baffle (3) is arranged obliquely relative to the heat exchange plate (2).

4. The static melt crystallizer for rapid purification according to claim 1, characterized in that: A plurality of second baffles (22) are also fixedly arranged in the heat exchange cavity of the heat exchange plate (2), and the plurality of second baffles (22) are staggered up and down.

5. The static melt crystallizer for rapid purification according to claim 1, characterized in that: It also includes a first temperature sensor (7) and a second temperature sensor (8), wherein the first temperature sensor (7) is arranged on the heat exchange inlet pipe (23), and the second temperature sensor (8) is arranged on the heat exchange outlet pipe (24).

6. The static melt crystallizer for rapid purification according to claim 1, characterized in that: The invention also comprises a jacket, which is arranged around the crystallization box (1), and the jacket is provided with a heat preservation chamber (51), a jacket inlet pipe (52), a jacket outlet pipe (53) and a jacket discharge pipe (54), and the jacket inlet pipe (52), the jacket outlet pipe (53) and the jacket discharge pipe (54) are all connected to the heat preservation chamber (51).

7. The static melt crystallizer for rapid purification according to claim 6, characterized in that: The jacket inlet pipe (52) and the jacket discharge pipe (54) are located below the heat preservation chamber (51), and the jacket outlet pipe (53) is located above the heat preservation chamber (51).

8. The static melt crystallizer for rapid purification according to claim 1, characterized in that: The material feed pipe (12) is located above the crystallization chamber (11), and the material discharge pipe (13) is located below the crystallization chamber (11).

9. The static melt crystallizer for rapid purification according to claim 1, characterized in that: A viewing mirror (6) is provided on the side wall of the crystallization box (1), and the crystallization chamber (11) can be seen through the viewing mirror (6).

10. The static melt crystallizer for rapid purification according to claim 9, characterized in that: It also includes an outer box (9), the crystallization box (1) is placed inside the outer box (9), the outer box (9) is provided with an opening (91), the sight glass (6) can be seen through the opening (91), casters (92) are provided below the outer box (9), and a paperless recorder (93) is provided on the side wall of the outer box (9).

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