Pneumatic helical ribbon stirring crystallization device

Abstract

The utility model provides a pneumatic helical ribbon stirring crystallization device. The pneumatic helical ribbon stirring crystallization device comprises a crystallization kettle body, a purging assembly, a low-temperature compressed air source and a steam source, the crystallization kettle body is provided with an accommodating cavity for receiving crystallization slurry and crystallizing, and a stirring structure is rotationally arranged in the accommodating cavity; the purging assembly is located at the bottom end of the containing cavity, connected with the stirring structure and used for directionally purging crystallization slurry and crystals in the crystallization kettle body, and the purging assembly is provided with a plurality of evenly-distributed spraying holes; the low-temperature compressed air source is arranged above the crystallization kettle body and is communicated with the purging assembly; the steam source is arranged above the crystallization kettle body, is communicated with the purging assembly and is used for providing steam for the purging assembly; the compressed air and the steam are sprayed out through the spraying holes. The utility model provides a pneumatic helical ribbon stirring crystallization device, and aims to solve the problems that in the prior art, slurry cannot be reversely dissolved and crystallized when being crystallized in a crystallization kettle body, materials need to be poured to dissolving process equipment in the previous step, and the operation is tedious.

Description

Technical Field

[0001] The utility model belongs to the technical field of food, medicine and chemical slurry crystallization, and specifically relates to a pneumatic screw belt stirring crystallization device. Background Art

[0002] The key to the crystallization process of slurry in pharmaceutical chemicals lies in controlling the suspension distribution and supersaturation of cooling crystals. The lower the temperature, the higher the supersaturation of the slurry, the more crystal nuclei are produced, and the smaller the crystal particle size. The higher the liquid level of the slurry, the longer the crystallization time, and the larger the particle size of the produced crystals. In the crystallization container, the stronger the stirring intensity of the stirring structure, the easier it is to break the crystals, and the smaller the crystal particle size will be. Generally, the faster the crystallization rate, the faster the cooling crystallization speed, the more uneven the local suspension saturation state of the slurry, and the more difficult it is to ensure the uniformity of particle size and crystal form during industrial crystallization. Different crystallization kettles and stirring forms have different mixing effects on materials, and the efficiency of heat and mass transfer is different.

[0003] The general industrial operation process of existing pharmaceutical chemical slurry crystallization is to feed into the crystallization kettle, start mechanical stirring, pass refrigerant into the jacket outside the crystallization kettle, and exchange heat between the slurry and the crystallization kettle to gradually cool down and crystallize.

[0004] In the prior art, after the slurry in the crystallization kettle has been crystallized for a certain period of time, when the slurry is at a low liquid level, stopping the mechanical stirring easily leads to unclean discharge, and there are wall residues at the bottom of the crystallization kettle. In addition, reverse dissolution and recrystallization cannot be achieved in the case of full kettle crystallization, and the material needs to be poured to the previous dissolution process equipment, which is cumbersome to operate, and the crystal particle size distribution obtained by crystallization is uneven, which is poor in practicality. Utility Model Content

[0005] The utility model provides a pneumatic screw belt stirring crystallization device, which aims to solve the problem in the prior art that slurry cannot be reversely dissolved and crystallized when crystallizing in a crystallization kettle body, and the material needs to be poured to the previous dissolution process equipment, which is cumbersome to operate.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a pneumatic screw ribbon stirring crystallization device, comprising:

[0007] The crystallization kettle body has a receiving chamber for receiving the crystal slurry and performing crystallization, and a stirring structure is rotatably arranged in the receiving chamber;

[0008] A purge assembly is located at the bottom end of the accommodating chamber and is connected to the stirring structure. The stirring structure drives the purge assembly to rotate. The purge assembly is used to directionally purge the crystal slurry and crystals in the crystallization kettle. The purge assembly has a plurality of evenly distributed spray holes.

[0009] A low-temperature compressed air source is disposed above the crystallization kettle body and is connected to the purge assembly to provide compressed air for the purge assembly;

[0010] A steam source is disposed above the crystallization kettle body and is in communication with the purge assembly, and is used to provide steam for the purge assembly;

[0011] Wherein, the compressed air and the steam are both sprayed out through the spray hole.

[0012] In a possible implementation, the pneumatic screw ribbon stirring crystallization device further includes a driving motor arranged above the crystallization kettle body, and the stirring structure includes:

[0013] A stirring shaft is arranged in the accommodating chamber, the stirring shaft is arranged in a vertical direction, the upper end of the stirring shaft is connected to the power output end of the driving motor, and the lower end of the stirring shaft extends to the discharge port of the accommodating chamber;

[0014] A stirring propeller is located in the accommodating chamber and is arranged on the stirring shaft, and is used to stir the crystal slurry in the accommodating chamber.

[0015] In a possible implementation, the purge assembly includes:

[0016] A first distribution pipe is located in the accommodating chamber and connected to the stirring shaft, and the first distribution pipe is located below the stirring propeller;

[0017] a second distribution pipe, located in the accommodating chamber and connected to the stirring shaft, the second distribution pipe being located below the first distribution pipe and spaced apart from the first distribution pipe;

[0018] Wherein, a plurality of the spray holes are evenly distributed on the first distribution pipe and the second distribution pipe.

[0019] In a possible implementation, the stirring shaft has a tube cavity for the compressed air and the steam to pass through, and the first distribution pipe and the second distribution pipe are both connected to the tube cavity.

[0020] In a possible implementation, the pneumatic screw ribbon stirring crystallization device further includes:

[0021] a first pipeline, one end of which is connected to the low-temperature compressed air source and the other end of which is connected to the tube cavity;

[0022] The second pipeline has one end connected to the steam source and the other end connected to the tube cavity.

[0023] In a possible implementation, the pneumatic screw-ribbon stirring crystallization device further includes a rotary joint, and the rotary joint is respectively connected to the stirring shaft, the first pipeline, and the second pipeline.

[0024] In a possible implementation manner, a first control valve is provided on the first pipeline, and a second control valve is provided on the second pipeline.

[0025] In a possible implementation, the pneumatic screw-ribbon stirring crystallization device further includes a radar level transmitter, and the radar level transmitter is disposed at the upper end of the crystallization kettle body.

[0026] In a possible implementation, the pneumatic screw-ribbon stirring crystallization device further includes a temperature transmitter, which is disposed on the crystallization kettle body and located between the first distribution pipe and the second distribution pipe, and is used to monitor the temperature of the crystal slurry in the containing chamber.

[0027] In a possible implementation, the pneumatic screw-ribbon stirring crystallization device further includes a base, which is disposed on the crystallization kettle body and is used for mounting the drive motor.

[0028] The beneficial effect of a pneumatic spiral belt stirring crystallization device provided by the utility model is that: compared with the prior art, by setting a stirring structure in the receiving chamber of the crystallization kettle body, the stirring structure can rotate, so that when the crystal slurry enters the receiving chamber, it is stirred by the stirring structure, the speed of crystallization is accelerated, the crystallization time is reduced, and the crystal particle size is uniform, which improves the efficiency of crystallization. A purge component is set in the receiving chamber, and the purge component is connected to the stirring structure, so that the stirring structure can drive the purge component to rotate, so that the purge component can evenly purge the crystal slurry and crystals in the receiving chamber. A low-temperature compressed air source connected to the purge component is set above the crystallization kettle body, which is used to provide compressed air for the purge component, and the compressed air is blown into the receiving chamber through the spray hole of the purge component, so that the crystal slurry and crystals at the bottom of the receiving chamber are blown out of the receiving chamber, avoiding the crystal slurry and crystals remaining at the bottom of the receiving chamber, and ensuring the effect of discharging. At the same time, steam can be provided to the purge component through a steam source, and the introduction of steam into the containing chamber can realize the reverse dissolution of the crystal suspension into the crystal slurry, eliminating the process of pouring materials into the dissolution process equipment, with simple structure, convenient operation and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a pneumatic screw-ribbon stirring crystallization device provided in an embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 10. Crystallization kettle body; 11. Stirring shaft; 12. Stirring propeller; 13. Bottom paddle; 14. Discharge port; 20. Purge assembly; 21. First distribution pipe; 22. Second distribution pipe; 30. Low-temperature compressed air source; 31. First pipeline; 40. Steam source; 41. Second pipeline; 50. Drive motor; 60. Radar level transmitter; 70. Temperature transmitter; 80. Base; 90. Rotary joint. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be noted that the directions or positional relationships indicated by terms such as “length”, “width”, “height”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “head” and “tail” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0034] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "fixation", "setting" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0036] See also Figure 1, now a pneumatic screw-belt stirring crystallization device provided by the utility model is described. The pneumatic screw-belt stirring crystallization device comprises a crystallization kettle body 10, a purge assembly 20, a low-temperature compressed air source 30 and a steam source 40. The crystallization kettle body 10 has a receiving chamber for receiving crystal slurry and performing crystallization, and a stirring structure is rotatably arranged in the receiving chamber. The purge assembly 20 is arranged at the bottom of the receiving chamber and is connected to the stirring structure. The stirring structure drives the purge assembly 20 to rotate, and the purge assembly 20 is used to directionally purge the crystal slurry and crystals in the crystallization kettle body 10, and the purge assembly 20 has a plurality of uniformly distributed spray holes. The low-temperature compressed air source 30 is arranged above the crystallization kettle body 10 and is connected to the purge assembly 20, and is used to provide compressed air for the purge assembly 20. The steam source 40 is arranged above the crystallization kettle body 10 and is connected to the purge assembly 20, and is used to provide steam for the purge assembly 20. Among them, compressed air and steam are both sprayed out through the spray holes.

[0037] In this embodiment, the crystallization kettle body 10 has a accommodating chamber, in which a stirring structure is rotatably arranged, and the accommodating chamber is used to receive the crystallization slurry, and a crystal with uniform particle size is obtained by rotating the stirring structure. A purge assembly 20 is arranged at the bottom of the accommodating chamber, and the purge assembly 20 is connected to the stirring structure, and the stirring structure drives the purge assembly 20 to rotate, and the purge assembly 20 has a plurality of uniformly distributed spray holes. A low-temperature compressed air source 30 is arranged above the crystallization kettle body 10, and the low-temperature compressed air source 30 is connected to the purge assembly 20, so that compressed air is blown into the accommodating chamber through the purge assembly 20. At the same time, a steam source 40 is also arranged above the crystallization kettle body 10, and the steam source 40 is connected to the purge assembly 20, so that steam is blown into the accommodating chamber through the purge assembly 20.

[0038] It should be noted that when compressed air is blown into the accommodating chamber, the steam source 40 is turned off. When steam is blown into the accommodating chamber, the low-temperature compressed air source 30 is turned off.

[0039] The pneumatic spiral belt stirring crystallization device provided by the embodiment of the utility model, compared with the prior art, is provided with a stirring structure in the receiving chamber of the crystallization kettle body 10, and the stirring structure can rotate, so that when the crystal slurry enters the receiving chamber, it is stirred by the stirring structure, the speed of crystallization is accelerated, the crystallization time is reduced, and the crystal particle size is uniform, so as to improve the efficiency of crystallization. A purge assembly 20 is provided in the receiving chamber, and the purge assembly 20 is connected to the stirring structure, so that the stirring structure can drive the purge assembly 20 to rotate, so that the purge assembly 20 can evenly purge the crystal slurry and crystals in the receiving chamber. A low-temperature compressed air source 30 connected to the purge assembly 20 is provided above the crystallization kettle body 10, which is used to provide compressed air for the purge assembly 20, and the compressed air is blown into the receiving chamber through the spray hole of the purge assembly 20, so that the crystal slurry and crystals at the bottom of the receiving chamber are blown out of the receiving chamber, so as to avoid the crystal slurry and crystals remaining at the bottom of the receiving chamber, and ensure the effect of discharging. At the same time, steam can be provided to the purge assembly 20 through the steam source 40. Introducing steam into the accommodating chamber can realize reverse dissolution of the crystal suspension into the crystal slurry, eliminating the process of pouring materials into the dissolution process equipment. It has a simple structure, convenient operation and good practicality.

[0040] Preferably, low-temperature compressed air performs heat exchange with the crystal slurry in the containing chamber, which effectively increases the supersaturation of the crystal slurry, reduces the crystallization residence time while ensuring the crystal particle size, improves the cooling crystallization efficiency, effectively reduces the stirring intensity of the crystallization kettle, and reduces the damage to the crystal form by the mechanical agitator, thereby making the material crystal form fuller and achieving a higher crystallization yield.

[0041] In some embodiments, see Figure 1 , the pneumatic spiral belt stirring crystallization device provided by the embodiment of the utility model also includes a driving motor 50 arranged above the crystallization kettle body 10. The stirring structure includes a stirring shaft 11 and a stirring propeller 12. The stirring shaft 11 is arranged in the accommodating chamber, and the stirring shaft 11 is arranged in the vertical direction. The upper end of the stirring shaft 11 is connected to the power output end of the driving motor 50, and the lower end of the stirring shaft 11 extends to the discharge port 14 of the accommodating chamber. The stirring propeller 12 is located in the accommodating chamber and is arranged on the stirring shaft 11, and is used to stir the crystal slurry in the accommodating chamber. In this embodiment, the upper end of the stirring shaft 11 is connected to the power output end of the driving motor 50, so that the driving motor 50 drives the stirring shaft 11 to rotate, and the stirring propeller 12 is arranged on the stirring shaft 11. The stirring propeller 12 rotates with the stirring shaft 11 to increase the stirring range of the crystal slurry, so that the stirring is more sufficient, and uniform crystal particles are obtained. Specifically, a bottom paddle 13 is arranged at the lower end of the stirring shaft 11.

[0042] In some embodiments, see Figure 1, the purge assembly 20 includes a first distribution pipe 21 and a second distribution pipe 22. The first distribution pipe 21 is located in the accommodating chamber and is connected to the stirring shaft 11. The first distribution pipe 21 is located below the stirring propeller 12. The second distribution pipe 22 is located in the accommodating chamber and is connected to the stirring shaft 11. The second distribution pipe 22 is located below the first distribution pipe 21 and is spaced apart from the first distribution pipe 21. Among them, a number of spray holes are evenly distributed on the first distribution pipe 21 and the second distribution pipe 22. In this embodiment, the first distribution pipe 21 and the second distribution pipe 22 are spaced apart in the accommodating chamber, and a number of spray holes are evenly distributed on the first distribution pipe 21 and the second distribution pipe 22, so that compressed air or steam is evenly sprayed into the accommodating chamber through the first distribution pipe 21 and the second distribution pipe 22, which can effectively blow the crystal slurry and the crystal out of the accommodating chamber to avoid clogging of the discharge port 14 of the accommodating chamber, or the steam introduced can realize the reverse dissolution of the crystal suspension into the crystal slurry, which has a simple structure and good practicality.

[0043] Preferably, a pressure-stabilizing fan-shaped nozzle is provided at each spray hole, and the spray direction of the pressure-stabilizing fan-shaped nozzle can be in multiple directions. In the process of the stirring shaft 11 driving the first distribution pipe 21 and the second distribution pipe 22 to rotate, compressed air or steam is sprayed in the direction of the stirring rotation, so that the spray kinetic energy helps drive the stirring, thereby reducing the consumption of existing stirring electric energy, reducing the motor load, and reducing the amount of electric energy used. When the pressure-stabilizing fan-shaped nozzle sprays downward, the crystal slurry and crystals in the receiving chamber can be purged, and the discharge at the bottom of the receiving chamber can be assisted when the liquid level is low, so as to avoid running the stirring shaft 11 at a low liquid level, causing damage to the stirring shaft 11, and extending the service life of the stirring structure.

[0044] In some embodiments, see Figure 1 The stirring shaft 11 has a tube cavity for compressed air and steam to pass through, and the first distribution pipe 21 and the second distribution pipe 22 are both connected to the tube cavity. In this embodiment, the compressed air and steam are transmitted to the first distribution pipe 21 and the second distribution pipe 22 through the tube cavity of the stirring shaft 11, so that the stirring shaft 11 can be used for multiple purposes, the structure is simplified, and the production cost is reduced.

[0045] In some embodiments, see Figure 1 The pneumatic spiral ribbon stirring crystallization device provided in the embodiment of the utility model further includes a first pipeline 31 and a second pipeline 41. One end of the first pipeline 31 is connected to the low-temperature compressed air source 30, and the other end is connected to the tube cavity. One end of the second pipeline 41 is connected to the steam source 40, and the other end is connected to the tube cavity. In this embodiment, the compressed air and steam are respectively guided into the tube cavity through the first pipeline 31 and the second pipeline 41, which is convenient for connection.

[0046] In some embodiments, see Figure 1The pneumatic spiral stirring crystallization device provided in the embodiment of the utility model further includes a rotary joint 90, which is respectively connected to the stirring shaft 11, the first pipeline 31 and the second pipeline 41. In this embodiment, the rotary joint 90 is respectively connected to the stirring shaft 11, the first pipeline 31 and the second pipeline 41, and the installation of the first pipeline 31 and the second pipeline 41 will not be affected during the rotation of the stirring shaft 11. Specifically, the rotary joint 90 can adopt the existing technology, and the connection between the rotary joint 90 and the stirring shaft 11, the first pipeline 31 and the second pipeline 41 all adopts the existing technology, which will not be described in detail here.

[0047] In some embodiments, see Figure 1 , a first control valve is provided on the first pipeline 31, and a second control valve is provided on the second pipeline 41. In this embodiment, the first control valve is used to control the on-off of the first pipeline 31, and when compressed air is blown into the accommodating chamber, the steam source 40 is closed through the second control valve. The second control valve is used to control the on-off of the second pipeline 41, and when steam is blown into the accommodating chamber, the low-temperature compressed air source 30 is closed through the first control valve.

[0048] In some embodiments, see Figure 1 The pneumatic screw-belt stirring crystallization device provided in the embodiment of the utility model also includes a radar liquid level transmitter 60, which is arranged at the upper end of the crystallization kettle body 10 and is used to monitor the liquid level of the crystallization slurry in the crystallization kettle body 10 in real time to improve the safety of the crystallization process.

[0049] In some embodiments, see Figure 1 The pneumatic spiral ribbon stirring crystallization device provided in the embodiment of the utility model further includes a temperature transmitter 70, which is arranged on the crystallization kettle body 10 and located between the first distribution pipe 21 and the second distribution pipe 22, and is used to monitor the temperature of the crystallization slurry in the accommodating chamber. In this embodiment, by arranging the temperature transmitter 70 on the crystallization kettle body 10, and the temperature transmitter 70 is arranged between the first distribution pipe 21 and the second distribution pipe 22, the temperature of the crystallization slurry is monitored in real time to ensure the crystallization effect.

[0050] In some embodiments, see Figure 1 The pneumatic screw ribbon stirring crystallization device provided in the embodiment of the utility model further includes a base 80, which is arranged on the crystallization kettle body 10, and the base 80 is used for installing the driving motor 50. In this embodiment, the base 80 is a semi-sealed structure with a cavity arranged inside, and a coupling is arranged inside the base 80, and the stirring shaft 11 is connected through the coupling.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic screw ribbon stirring crystallization device, characterized in that: include: The crystallization kettle body has a receiving chamber for receiving the crystal slurry and performing crystallization, and a stirring structure is rotatably arranged in the receiving chamber; A purge assembly is located at the bottom end of the accommodating chamber and is connected to the stirring structure. The stirring structure drives the purge assembly to rotate. The purge assembly is used to directionally purge the crystal slurry and crystals in the crystallization kettle. The purge assembly has a plurality of evenly distributed spray holes. A low-temperature compressed air source is disposed above the crystallization kettle body and is connected to the purge assembly to provide compressed air for the purge assembly; A steam source is disposed above the crystallization kettle body and is in communication with the purge assembly, and is used to provide steam for the purge assembly; Wherein, the compressed air and the steam are both sprayed out through the spray hole.

2. A pneumatic spiral ribbon stirring crystallization device as claimed in claim 1, characterized in that: The pneumatic screw-belt stirring crystallization device further comprises a driving motor arranged above the crystallization kettle body, and the stirring structure comprises: A stirring shaft is arranged in the accommodating chamber, the stirring shaft is arranged in a vertical direction, the upper end of the stirring shaft is connected to the power output end of the driving motor, and the lower end of the stirring shaft extends to the discharge port of the accommodating chamber; A stirring propeller is located in the accommodating chamber and is arranged on the stirring shaft, and is used to stir the crystal slurry in the accommodating chamber.

3. A pneumatic screw ribbon stirring crystallization device as claimed in claim 2, characterized in that: The purge assembly comprises: A first distribution pipe is located in the accommodating chamber and connected to the stirring shaft, and the first distribution pipe is located below the stirring propeller; a second distribution pipe, located in the accommodating chamber and connected to the stirring shaft, the second distribution pipe being located below the first distribution pipe and spaced apart from the first distribution pipe; Wherein, a plurality of the spray holes are evenly distributed on the first distribution pipe and the second distribution pipe.

4. A pneumatic screw-ribbon stirring crystallization device as claimed in claim 3, characterized in that: The stirring shaft has a tube cavity for the compressed air and the steam to pass through, and the first distribution pipe and the second distribution pipe are both connected to the tube cavity.

5. A pneumatic screw ribbon stirring crystallization device as claimed in claim 4, characterized in that: The pneumatic screw ribbon stirring crystallization device also includes: a first pipeline, one end of which is connected to the low-temperature compressed air source and the other end of which is connected to the tube cavity; The second pipeline has one end connected to the steam source and the other end connected to the tube cavity.

6. A pneumatic screw-ribbon stirring crystallization device as claimed in claim 5, characterized in that: The pneumatic screw-belt stirring crystallization device also includes a rotary joint, which is respectively connected to the stirring shaft, the first pipeline and the second pipeline.

7. A pneumatic spiral ribbon stirring crystallization device as claimed in claim 5, characterized in that: The first pipeline is provided with a first control valve, and the second pipeline is provided with a second control valve.

8. A pneumatic screw ribbon stirring crystallization device as claimed in claim 3, characterized in that: The pneumatic screw ribbon stirring crystallization device also includes a radar liquid level transmitter, and the radar liquid level transmitter is arranged at the upper end of the crystallization kettle body.

9. A pneumatic spiral ribbon stirring crystallization device as claimed in claim 8, characterized in that: The pneumatic screw-belt stirring crystallization device also includes a temperature transmitter, which is arranged on the crystallization kettle body and located between the first distribution pipe and the second distribution pipe, and is used to monitor the temperature of the crystal slurry in the containing chamber.

10. The pneumatic screw ribbon stirring crystallization device according to claim 2, characterized in that: The pneumatic screw-belt stirring crystallization device also includes a base, which is arranged on the crystallization kettle body and is used for installing the driving motor.

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