I would like to ask about drying equipment
Thread Content
For chemical powder materials, the drying temperature should not exceed 110 degrees; the moisture content of the material entering the dryer is 25%, and it is required that the moisture content after drying be less than 1%. What type of dryer is suitable for this purpose?
The drying temperature is limited; only electric heating or steam heating can be used. Reducing it from 25% to 1% will likely take a very long time, resulting in low drying efficiency
Try the fluidized bed! Material name?
A vacuum dryer can be used, with hot water for heating.
Air flow drying can be considered, but it is necessary to control the steam temperature or use hot water in the heater
【Freeze Drying】Vacuum freeze drying can remove 95% to over 99% of the water, allowing the product to be stored for a long time without deteriorating.
Could the method of dry gas adsorption plus heating for drying be considered?
Please refer to the PVC drying process; either a fluidized bed or a cyclone bed can be used. More detailed information about the properties of your powder is needed in order to make a choice, such as the density of the material.
Several factors need to be considered when selecting a dryer: (1) the properties of the material, such as viscosity, its ability to come into contact with air, the requirements for the material after drying, and its density; (2) the type of heat source to be used, such as steam, heat transfer oil, electricity, flue gas, etc.; (3) whether direct drying or indirect drying should be employed, based on the properties of the material; (4) there are many types of dryers available, such as paddle dryers, disk dryers, thin-layer dryers, low-temperature dryers, and fluidized bed dryers, and the appropriate drying method must be chosen according to the specific needs of the project.
The material in question is o-aminobenzoic acid. Previously, a tray dryer was used, but the high temperatures caused the material to burn and scorch. A twin-cone dryer was also tried, and the material formed into balls. Now, boiling drying is being used; however, small burnt particles still appear sometimes.