How to deal with the crystalline deposits attached to the inner wall of the cooling crystallization tank
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Hello everyone. I recently built a 2L crystallization reactor with a conical head. During the experiments, crystallization occurred on the inner wall of the reactor. A scraper agitator was used, but as the temperature dropped, the crystals caused the agitator motor to get stuck. When the reactor lid was opened, a thick layer of crystals was found on the inner wall. The scraper used was a \"fluid self-pressure type\" PTFE agitator. May I ask, professor, what could be the reason for this situation? How to solve this problem?
:L:L:L:L:L:L:No one answered me
There is no solution to this phenomenon. All the hot and cold contact surfaces of the crystallization vessels are covered with crystallized material. The adhesion strength of the crystal varies depending only on the smoothness of the contact surface.
Try changing the design of the stirrer blade to a frame-type blade, and increase the power of the drive motor~~~ Adjust the speed of the stirrer blade~~
The temperature dropped too quickly, resulting in a large temperature difference between the inside and outside of the reactor. The mixing pattern and speed are unreasonable. The supersaturation at the concentration endpoint is too high. Any of them could be the reason.
At first, the temperature difference during cooling was too large; it is necessary to reduce this temperature difference as well as polish the inner wall.