When drying heat-sensitive, high-value materials, traditional hot-air drying often leads to oxidation, crust formation, and uneven heating. While conventional vacuum drying enables low-temperature dehydration, its efficiency is frequently hampered by poor heat transfer. How can we balance low temperature, high efficiency, uniformity, and energy savings? The answer lies in the Heated Air Circulation Vacuum Dryer—an innovative solution that combines a vacuum environment with forced convective hot air.
Why Is It Superior to Conventional Vacuum Drying?
Conventional vacuum drying relies primarily on conduction and radiation for heat transfer, resulting in slow heat penetration and long drying cycles, especially for large or stacked materials. In contrast, the Heated Air Circulation Vacuum Dryer introduces a controllable circulating hot air system within the vacuum chamber, achieving:
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Efficient Heat Transfer: Forced convection significantly enhances heat exchange efficiency, reducing drying time by 30%–50%.
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Uniform Temperature Distribution: Chamber temperature variation can be controlled within ±1°C, preventing localized overheating or under-drying.
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Rapid Moisture Removal: Continuously flowing hot air carries away evaporated moisture from the material surface, preventing re-adsorption.
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Energy Saving & Reduced Consumption: Compared to atmospheric hot-air drying, energy consumption is lowered by over 40%, with no oxidative losses.
Wide-Ranging Applications, Immediate Value
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Pharmaceutical Industry: Low-temperature drying of APIs, intermediates, and biologics to preserve active ingredients.
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Food Industry: Freshness-locking drying of high-nutrition materials like fruit/vegetable powders, probiotics, and flavors/fragrances.
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New Energy Materials: Deep dehydration (to ppm levels) of lithium-ion battery cathode/anode materials and separators.
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Fine Chemicals: Damage-free drying and anti-agglomeration treatment of catalysts, nano-powders, and crystalline products.
Our independently developed Heated Air Circulation Vacuum Dryer features a dual-stage vacuum system, PID precise temperature control, and a clean stainless-steel chamber. It supports CIP/SIP, data logging, and remote monitoring, fully meeting the requirements for GMP, ISO compliance, and automated production line integration.