Working Principle
Heat energy (such as hot water, low-pressure steam, or thermal oil) is introduced into the enclosed interlayer, and heat is transferred to the dried material through the inner shell.
Driven by an electric motor, the tank rotates slowly, and the materials inside the tank continuously mix, thereby achieving the goal of strengthening drying.
By using a vacuum pump to pump the tank into a vacuum state, the material is placed in a vacuum state. The pressure drops and the boiling point decreases, causing the water (solvent) on the surface of the material to reach a saturated state and evaporate. The vacuum pump is used to timely discharge and recover the material.
The water (solvent) inside the material continuously permeates, evaporates, and discharges to the surface, and the three processes continue to occur, enabling the material to achieve drying in a short period of time.
Equipment Features
This machine is suitable for drying materials in industries such as pharmaceuticals, chemicals, food, dyes, metallurgical powders, etc.
This machine has a compact structure, smooth operation, simple operation, reduced labor intensity, and increased labor efficiency.
Due to operating in a vacuum state, there is a higher drying rate at lower temperatures, which saves energy and has a high heat utilization rate.
Sealed and dry, suitable for materials with oxygen and danger. For general materials, it can also reduce the chance of leakage and debris mixing, and obtain products with high purity.
Specification Parameter Table
| Specification | SZG-350 |
| Total Volume(L) | 350 |
| Working Volume(L) | 175 |
| Heating Area(㎡) | 2.3 |
| Rotate Speed(rpm) | 3-10 |
| Power（KW） | 1.5 |
| Overall Dimensions (mm) | 2500*900*2550 |
| Design Pressure Inside the lank (Mpa) | -0.096—0.1 |
| Jacket Design Pressure (Mpa) | ≤0.3 |
| Equipment Weight（KG） | 1300 |
Application
· High-temperature, heat-sensitive materials cannot be accepted.
· Materials that are prone to oxidation and are dangerous
· Materials that are not allowed to damage the crystal
· Materials for recycling residual volatile matter
· Highly irritating and toxic materials
· Drying of sterile raw materials
Drying temperature
Depending on the physical properties of the material, an appropriate temperature can be selected. Usually, a variable-temperature drying method can be used. In the early stage of drying, the temperature is low and gradually increases to increase the drying rate.
When starting to vacuum and heat up, the drying speed is slow. When the material is heated above the vaporization temperature of water, the drying speed will suddenly accelerate. The material is heated to the vaporization temperature under the corresponding pressure within the allowable temperature range, and a large amount of vaporization occurs. At this time, the material temperature remains unchanged, and the added heat is used for vaporization heat and various heat losses. The vacuum system continuously discharges vaporized steam, maintaining the pressure difference between the evaporation surface and the space, Allow drying to continue. The moisture content of the material decreases to a certain extent, and the moisture evaporated from the material decreases. With the same heating amount, the temperature of the material begins to rise, the pressure difference between the evaporation surface and the space decreases, and the drying enters the deceleration stage. The drying rate gradually decreases until it reaches zero.
