Uniform Heating Vacuum Tray Dryer Design with Lowered Boiling Point Drying

The uniform heating vacuum tray dryer places wet material in trays and dries it in a negative pressure vacuum environment created by a vacuum pump, while a heating medium is circulated between the jacket and the pipes for heat conduction drying. The evaporated moisture is removed by the vacuum pump.

The boiling point of the material is lowered under vacuum, which makes the dried material heat more evenly. The result is uniform drying across the trays without the hot spots that can damage heat-sensitive products, and the closed chamber keeps the process isolated from the external environment.

Note: The above data is for reference only. If you have any special requirements, our factory can provide design and consultation services.

Wet material is loaded into trays inside the sealed chamber and the vacuum pump lowers the internal pressure, which lowers the boiling point of the material. A heating medium circulated between the jacket and the pipes conducts heat evenly into the trays, and because the material heats uniformly, moisture is released at a steady rate and removed by the vacuum pump. The even heat distribution keeps drying consistent across the whole batch.

1. Wet material is placed into trays inside the drying chamber.
2. The vacuum pump creates a negative pressure vacuum environment.
3. A heating medium is introduced between the jacket and the pipes for heat conduction drying.
4. The moisture evaporated from the material is removed by the vacuum pump.
5. Recovered solvent is condensed and collected through a condenser and a buffer tank.

• Lowered boiling point under vacuum makes the dried material heat more evenly.
• Even heat distribution through the jacket and internal pipes.
• Even drying without hot spots that can damage heat-sensitive products.
• Heat source can be low-pressure steam, thermal oil or circulating hot water.
• Static tray drying preserves the shape of the dried material.
• Sterilization before drying with no impurities introduced, meeting GMP requirements.

It is suitable for low-temperature drying of heat-sensitive materials and is widely used in the pharmaceutical, chemical, food and electronics industries wherever uniform drying quality is important.

• Heat-sensitive powders and granules that require even drying.
• Pharmaceutical, chemical, food and electronics industries.
• Products that must not develop hot spots during drying.