How to choose pharmaceutical drying equipment

Drying equipment has always been one of the leading equipment in pharmaceutical equipment. As the quality requirements of drugs continue to increase, the requirements for drying equipment are also increasing. When choosing drying equipment, there are many aspects to consider, mainly the characteristics of the drug, the quality requirements of the finished product, and the most important thing to consider is sterile contamination. Unlike the traditional dryer selection, the selection of pharmaceutical drying equipment is relatively limited. Common dryers are mainly the following:
Types of drying equipment for pharmaceutical machinery
1 Vacuum dryer: As the oldest drying equipment in the pharmaceutical industry, the vacuum drying oven has always been the mainstay of the industry. The main machine is divided into several layers by the heating plate. The heating medium (hot water or low-pressure steam) is passed into the heating plate to heat the drugs to be dried through heat transfer. A vacuum pump is used to evacuate the vacuum, and the evaporated water is pumped away by the vacuum pump. This type of equipment is widely used in small and medium-sized trial production, and there are problems such as imperfect online cleaning function, high labor intensity, and low drying efficiency.
2 Vacuum rotary dryer (double cone dryer): There are 2 hollow suspension shafts in the middle of the cone, which are used to support the rotation of the equipment, vacuumization and hot water channels. The medicine to be dried rotates continuously in the dryer to achieve the drying effect. The equipment needs to regularly check the sealing effect of the hollow shaft.
3 Spray dryer: One of the most popular drying equipment at present. You can read "Selecting Chinese herbal medicine extract spray dryer for drying Chinese herbal medicine extract". It is suitable for liquid, paste and other materials with good fluidity.
4 Freeze dryer (freeze dryer): This type of equipment has a good drying effect on heat-sensitive and easily oxidized medicines. See "Vacuum Freezing Process of Western Medicine"
After reading the entire article, what other methods do you think can better choose pharmaceutical drying equipment?