The Internals of a Room Temperature Vacuum Crystallizer: How to Optimize Crystal Growth? (Shopping - Wholesale)
Item ID 2514420 in Category: Shopping - Wholesale
The Internals of a Room Temperature Vacuum Crystallizer: How to Optimize Crystal Growth? | |
The internal structure of the Room Temperature Vacuum Crystallizer plays a vital role in crystal growth. First of all, the design of the stirring device is one of the key factors. Reasonable stirring paddle form and speed can ensure that the solution is evenly mixed in the crystallizer and prevent excessive differences in local supersaturation. For example, the use of a propulsion stirring paddle can generate axial flow, so that the solution forms a good circulation, avoids excessive concentration of the solution in some areas and too dilute in other areas, and ensures that the crystal grows in a relatively stable and uniform supersaturated environment. The stirring speed should not be too fast, otherwise it may damage the growing crystals and interrupt the growth process of the crystals. The appropriate speed needs to be optimized according to factors such as the size of the crystallizer and the properties of the solution. Secondly, the internal guide components should not be ignored. The guide plate can guide the flow direction of the solution so that the solution forms a specific flow pattern in the crystallizer. For example, it is designed to be a flow pattern that is conducive to the sedimentation of crystals in a specific area, so that crystals that have formed a certain size can be smoothly transferred from the supersaturated area to the slower growing area, avoiding agglomeration and secondary nucleation between crystals. At the same time, the layout of the guide plate should take into account the influence on the uniformity of the flow field in the entire crystallizer to prevent the occurrence of dead zones, because the stagnation of the solution in the dead zone may cause abnormal local supersaturation, affecting the quality and growth rate of the crystal. Furthermore, the material and roughness of the inner wall of the crystallizer have an impact on crystal growth. The inner wall should be as smooth as possible to reduce the adhesion of crystals on the wall. Some special coating materials can be applied to the inner wall to reduce the adhesion between the crystal and the wall, so that the crystal can grow freely in the solution. Moreover, the shape of the crystallizer will also affect the internal flow field and crystal growth environment. Appropriate geometric parameters such as aspect ratio can optimize the residence time distribution of the solution in the crystallizer and provide more favorable conditions for crystal growth. Finally, it is also very important to set up a suitable seed delivery device in the crystallizer. The uniform delivery of seeds can provide more cores for crystal growth and control the growth direction and size distribution of crystals. The delivery position and delivery amount need to be precisely designed to ensure that the seeds can be evenly dispersed in the solution, make full use of the supersaturation of the solution, promote the orderly growth of crystals, and thus improve the quality and yield of crystals. | |
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2024-11-24 (0.224 sec)