Product Description
The industrial vacuum microwave dryer integrates 2450 MHz microwave volumetric heating with vacuum low‑pressure drying technology. Microwave energy directly acts on polar water molecules inside wet materials including herbal extracts, medicinal herbs, fruit‑vegetable products, biological raw materials, heat‑sensitive chemical materials and high‑value food ingredients. Water molecules vibrate, rub and collide at an ultra‑high frequency of 2.45 billion times per second, generating heat inside the material itself. Under vacuum negative‑pressure condition, the boiling point of water is greatly reduced, enabling rapid low‑temperature vaporization and evacuation of moisture from materials.
Different from conventional hot‑air drying and ordinary vacuum drying which rely on surface heat conduction, this combined technology effectively solves common industry pain‑points: high‑temperature degradation of active components, material surface hardening, slow drying speed, uneven moisture removal, oxidation discoloration and unstable batch quality of heat‑sensitive raw materials.
During operation, wet materials are placed on special microwave‑resistant trays inside the sealed vacuum chamber. The vacuum pump extracts air inside the cavity to form stable negative‑pressure environment. Microwave penetrates materials and achieves inside‑out volumetric heating. Evaporated water vapor is condensed by the condenser and rapidly discharged out of the system, completing integrated low‑temperature dehydration, drying and partial sterilization in batch processing mode.
The low‑oxygen vacuum environment inhibits oxidative deterioration. It maximally retains natural color, flavor, flavonoids, alkaloids and other heat‑labile active substances of raw materials, improving finished‑product quality and storage stability for high‑value industrial production.
Main Advantages
Volumetric Internal Heating, Low‑temperature Rapid Drying
Adopts molecular volumetric heating instead of surface heat transfer. Heat generates inside the material, avoiding heat‑conduction lag. Under vacuum condition, drying can be realized at 40‑60℃ low temperature, greatly shortening drying cycle compared with traditional drying equipment, preventing surface crusting phenomenon. Moisture content reaches uniform standard for each batch of materials, significantly raising finished‑product qualification rate for high‑value material processing.
Gentle Low‑oxygen Processing, Protect Heat‑sensitive Active Ingredients
Low‑pressure and low‑oxygen working atmosphere suppresses oxidation reaction. Short‑time low‑temperature drying well preserves pigments, volatile aroma components and bio‑active substances. Especially suitable for high‑value raw materials that cannot withstand high‑temperature treatment, such as herbal extracts, ginseng, edible flowers, enzyme preparations and biological intermediate products.
PLC Intelligent Multi‑parameter Control, Flexible Process Customization
Equipped with PLC touch‑screen control system; microwave power, vacuum degree, drying temperature and holding time support stepless adjustment. Multiple groups of drying process recipes can be stored for quick switching, adapting to extracts, paste materials, granules, slices and block‑shaped raw materials with different initial moisture. Real‑time monitoring for cavity temperature, vacuum value and material temperature; modular structure facilitates routine cleaning and maintenance complying with pharmaceutical and food‑grade hygiene requirements.
Batch‑type Sealed Production, Synchronous Sterilization & High Safety Performance
Complete sealed vacuum chamber prevents external impurity contamination. Multi‑level microwave leakage suppression ensures leakage complies with international safety standards. Microwave delivers synchronous sterilization effect to inhibit mould and harmful microorganisms. Equipped with over‑temperature protection, pressure‑relief safety valve and water‑cooling protection for magnetron, supporting stable long‑time batch‑to‑batch production, meeting domestic pharmaceutical‑food and export‑grade raw‑material standards.
Equipment Composition
The industrial vacuum microwave dryer adopts SUS304 / SUS316 stainless‑steel sealed vacuum chamber modular design, complying with GMP hygiene standards for food and pharmaceutical processing. The complete set includes vacuum drying chamber, microwave generator unit, vacuum pump system, condenser moisture‑recovery unit, special microwave‑resistant material trays, infrared online temperature‑monitoring module, pressure‑relief safety protection device, PLC intelligent control cabinet and water‑cooling circulating system. It is specially designed for large‑scale standardized low‑temperature dehydration and drying of various heat‑sensitive industrial raw materials.
Application Fields
Custom‑developed for Chinese‑herbal‑medicine factories, plant‑extract enterprises, biological‑product manufacturers, high‑end food‑processing plants and export‑oriented raw‑material producers. Widely used for low‑temperature microwave vacuum dehydration and drying for diverse heat‑sensitive materials. Treated materials feature low residual moisture, complete active components and stable quality.
