The laboratory boiling dryer adopts fluidized bed drying technology, which involves two mutual processes of heat and mass transfer. In the process of convective drying, hot air transfers heat energy to the surface of the material through contact with wet materials, and then from the surface to the inside of the material, which is a heat transfer process; After the wet material is heated, the surface moisture first vaporizes, while the internal moisture diffuses to the surface of the material in liquid or gaseous form and continuously vaporizes into the air, gradually reducing the moisture content of the material and completing drying. This is a mass transfer process.

Boiling drying, also known as fluidized bed drying, uses hot air flow to suspend wet particles. Fluidized boiling allows for heat exchange of materials, and evaporated water or organic solvents are carried away by hot air. It uses hot air flow to transfer mass and heat through gas-solid two-phase suspension contact, achieving the purpose of wet particle drying.

Before using the laboratory boiling dryer, the following checks need to be done:

1. The bearing and gear life of a boiling dryer is generally 2-3 years. The lubrication of the cycloidal reducer should be regularly checked for oil level, and the new equipment should be replaced with oil after 50 hours of full operation. According to the cleaning procedure of the boiling dryer, improve equipment hygiene.

2. Check the engine oil once per shift and replenish it promptly if there is a shortage of oil. The main transmission box, distribution box, and transmission gear oil and grease should be checked once and a half. Add or replace gear oil and grease appropriately. Disassemble the bottom bearing of the spiral shaft after running for 500 hours (disassemble the new machine after running for 100 hours). If any damage is found during disassembly, it should be replaced. The lubrication of bearings should be strictly checked. Maintain the equipment according to the maintenance procedure of the boiling dryer.

3. Check if the components of the boiling dryer are intact and disinfect them according to the boiling dryer disinfection procedure. Equipment, hands, feet, and objects must not be inserted into the cone to prevent accidents from occurring. When upsampling, it is necessary to stop. If foreign objects are found to enter the machine, it should be stopped in a timely manner, unloaded, and restarted.

4. Check if the air compressor of the dryer is lubricated and if there is cooling water in the storage tank. If there is, it will be depleted.

5. Install the package and other components, turn on the power, check if the automatic and manual switches are flexible, and set relevant data.

6. Prepare wet particles in a timely manner, promote the boiling dryer, open the laboratory boiling dryer for drying, strictly control the daily dry and wet particle amount to not exceed 100 kilograms, and control the drying temperature and time.