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Analysis of the principle of in-situ Freeze Dryer
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Freeze-dried rose |
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Analysis of the principle of in-situ Freeze Dryer
The in-situ Freeze Dryer technology is actually a drying technique in which the ice in the pre-frozen sample is directly sublimated into a water vapor discharge sample under certain vacuum and low temperature conditions, so that the sample can be dried by water. , often referred to as freeze-drying technology. As with other drying methods, in order to maintain this sublimation drying continuously, two basic conditions must be met, namely the continuous supply of heat and the continuous elimination of the generated steam.
First talk about the supply of heat. Why do you need heat supply? This is because the lyophilization actually carries out the sublimation process, the moisture in the sample is separated from the sample by sublimation, and the sublimation is an endothermic process, and heat supply is a necessary condition. At the beginning of drying, if the sample temperature is relatively high, the heat required for sublimation can be taken from the sample itself, and the loss of heat is a manifestation of temperature drop, which is why the sample will remain cold during lyophilization. However, as the sublimation progresses, the temperature of the sample quickly drops to a temperature equilibrium with the vapor partial pressure of the drying chamber. At this time, if no external heat is supplied, the sublimation process will stop. Therefore, during lyophilization, the sample must be heated by ambient air or artificially designed to provide sufficient heat to the sample to maintain sublimation.
In the case of external heating, more and more steam is generated by sublimation. faster drying rate be achieved.
If you have the needs of freeze dryers, freeze dryers, etc., you need to know the quotation, Please go to http://www.vacuumfreezedryer.cn/ to find the phone +86-10-58895379 or email: info@ Bjsyhx.com.cn Contact us, we will contact you in the first time.
http://www.vacuumfreezedryer.cn/Clinical-and-Production-Freeze-Dryers_108.html
http://www.vacuumfr |
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Beijing Songyuan Huaxing Technology Development Co., Ltd.
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Mr. tingting cheng |
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Room 706 Tower C, Changyin Building |
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100000 |
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01058895377 |
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01058895377 |
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