Overview of Square Circular Vacuum Drying Machine Equipment
Vacuum drying is the process of reducing the boiling point of moisture in materials below atmospheric pressure, removing moisture from the material, and achieving low-temperature drying. By using a vacuum pump to extract air and moisture, a vacuum state is formed in the working chamber, which accelerates the drying speed. Vacuum drying machines are divided into static drying machines and dynamic drying machines. The YZG-FZG square vacuum drying machine belongs to the static vacuum drying machine.

Working principle of square circular vacuum dryer
The vacuum dryer belongs to conduction drying, which combines a condenser, vacuum pump, and conduction dryer to form a vacuum drying device. Due to the characteristics of low drying temperature, high drying rate, energy saving, and equipment sealing and pollution prevention, most conduction dryers can be designed as vacuum drying devices. Vacuum drying plays a unique role in drying biological products, pharmaceuticals, beverages, as well as heat sensitive materials, oxygen sensitive materials, solvent recovery, and other drying processes.
A vacuum drying oven is a drying equipment that operates intermittently under vacuum conditions. It mainly consists of a vacuum drying oven, a heating system, a cooling system, an exhaust system, a temperature and pressure measurement system, a control system, and a condensation recovery system. Vacuum drying ovens are divided into cylindrical and square types. Large vacuum drying equipment often uses the former, which is characterized by good strength and stability under external pressure, and good processability. However, the effective space utilization rate of the vacuum chamber is relatively low. Small vacuum drying equipment often adopts the latter, which is characterized by a high utilization rate of effective space in the vacuum chamber. Although the stability under external pressure is worse than that of a circular shape, it can be solved by reinforcing ribs.

Performance characteristics of square circular vacuum dryer
1. Can achieve a higher drying rate at lower temperatures and fully utilize heat;
2. Capable of low-temperature drying or drying of heat sensitive materials;
3. Capable of drying materials containing solvents and those that require solvent recovery;
4. Disinfection treatment can be carried out before drying, and no impurities are mixed in during the drying process, which meets GMP requirements;
5. It belongs to a static vacuum dryer, so the shape of the dried material will not be damaged;
6. The boiling point of the material solution decreases under vacuum, which increases the heat transfer driving force of the evaporator, thus saving the heat transfer area of the evaporator for a certain amount of heat transfer;
7. The heat source for evaporation operation can be low-pressure steam or waste heat steam;
8. Less heat loss in the evaporator;
9. It belongs to a static vacuum dryer, so the shape of the dried material will not be damaged.

Process flow diagram of square circular vacuum dryer

Technical improvement of square circular vacuum dryer
1. Add top plate heating device to effectively avoid the phenomenon of condensation water droplets on the top plate;
2. Adding a drainage device can periodically drain the accumulated water inside the box to the outside during equipment operation, resulting in secondary evaporation of condensed water;
3. Adding an air drive device can suddenly introduce air on one side of the box, driving the accumulated water vapor on the upper layer of the material to the other side of the box, and quickly pumping it out of the box through a symmetrical vacuum suction tube, thereby improving the drying efficiency.
4. Improved the heating method of the drying rack cloth by adopting an eight layer parallel and staggered water inlet method, reducing the temperature difference between the inlet and outlet water, and relatively improving the uniformity of the cloth heating. The uniformity of the drying of the entire box of materials has been greatly improved.

Application scope of square circular vacuum dryer
Suitable for low-temperature drying of thermosensitive materials that are prone to decomposition, polymerization, and deterioration at high temperatures; Widely used in industries such as pharmaceuticals, chemicals, food, electronics, etc.

Technical specifications for square circular vacuum dryer

Note: The water ring vacuum pump is used in conjunction with mechanical pressurization to increase the vacuum degree.

Ordering Notice for Square Circular Vacuum Drying Machine
When placing an order, please choose a suitable vacuum dryer based on factors such as the initial moisture content, final moisture content, temperature, vacuum degree, drying amount, and drying time of the dry material.
There are four heating methods for the same model of vacuum dryer: steam, hot water, thermal oil, and electric heating. For example, in order to increase the drying capacity, the number of drying rack layers can be appropriately increased. Please inform our factory in a timely manner.
Our factory can provide and install the accessories for the vacuum drying system mentioned in the user manual. Please specify when placing an order.
Our company can provide design, manufacturing, and installation services for special requirements in vacuum drying systems raised by users.
Our company implements three quality guarantees for our equipment. All accessories are provided for a long time, so please rest assured.