Views: 1 Author: Site Editor Publish Time: 2025-07-26 Origin: Site
Recently, we welcomed an important client who brought magnesium citrate for a detailed drying process test with our core equipment: the Hollow Screw Vacuum Dryer. The test results were exhilarating, not only significantly reducing drying time but also achieving exceptional drying quality.
Magnesium citrate, a high-value material widely used in the food, pharmaceutical, and nutritional supplement industries, has stringent requirements for drying efficiency and quality.
The client reported that their existing single-cone ribbon vacuum dryer took 40 hours per batch to dry magnesium citrate (initial moisture ~40%, requiring removal of crystal water), resulting in extremely low efficiency. The drying process faced the following challenges:
· Long drying time: Difficulty in removing crystal water led to extended production cycles.
· Incomplete moisture removal: Final moisture content was hard to stabilize below 2%.
Upon learning about the outstanding performance of our Hollow Screw Vacuum Dryer in the drying field, the client promptly arranged to bring their material to our testing center for evaluation.
Our Hollow Screw Vacuum Dryer, with its unique design and advanced technology, successfully tackled the core challenges of drying magnesium citrate:
The hollow screw structure, combined with a vacuum environment, significantly enhances heat transfer efficiency. In this test, magnesium citrate began evaporating surface water at a low temperature of around 40°C, greatly reducing drying time while preserving the chemical stability of the material.
The vacuum state effectively isolates oxygen, preventing material oxidation or degradation.
The screw stirring design ensures continuous material turnover, creating an even heating surface to guarantee consistent drying and improved quality.
For materials dried at high temperatures, reabsorption of moisture from the air is a concern. While natural cooling takes a long time, our vacuum dryer uses fast-cooling thermal oil to rapidly cool the material.
Fine materials often clog filter bags, reducing drying efficiency. Our back-blow system easily dislodges powder adhering to the filter, and nitrogen can be introduced to protect oxygen-sensitive materials.
Equipped with an advanced PLC control system, the dryer precisely adjusts temperature, vacuum degree, and stirring speed, ensuring highly repeatable and stable processes while significantly boosting production efficiency.
During the test, the client observed the entire process from material loading to drying and discharge. Samples were continuously taken and tested in water for clarity to ensure the drying met the client's standards. The test data and results were impressive:
Compared to the client’s original single-cone ribbon vacuum dryer (40 hours/batch), the Hollow Screw Vacuum Dryer completed drying in just 4 hours, achieving an efficiency improvement of over 10 times!
The dried magnesium citrate consistently achieved a final moisture content of below 0.05%, fully meeting the client’s requirements.
Through repeated sampling and water clarity tests, the dried magnesium citrate exhibited crystal-clear transparency with no impurities or discoloration.
The critical physicochemical properties of magnesium citrate (e.g., solubility, purity) were fully maintained, ensuring excellent quality.
After the test, the client remarked that the efficiency of our Hollow Screw Vacuum Dryer is unmatched in the vacuum drying industry!
· Operating Temperature: 30°C–200°C
· High Vacuum Degree: -0.1 MPa
· Flexible Processing Capacity: 100L–5000L per batch, suitable for small-scale trials to large-scale industrial production
· Controllable Drying Time: Precisely adjustable based on material properties, ensuring efficiency and energy savings
· Continuous Drying: 3000L–12000L, with automatic feeding and discharging under vacuum for continuous operation
3500L continue vacuum dryer
If you’re facing challenges such as low drying efficiency, high energy consumption, or uneven drying, we invite you to experience the remarkable capabilities of our Hollow Screw Vacuum Drying Technology firsthand. Machtech is ready to provide you with the optimal solution!
email: info@machtechdryer.com
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