In industries where product integrity, solvent recovery, and low‑temperature drying are critical, the Double Cone Rotary Vacuum Dryer stands out as a premier choice. This advanced drying system combines mixing and drying in a single, closed vessel, making it indispensable for pharmaceutical, chemical, and food processing applications.
The Double Cone Rotary Vacuum Dryer is a new‑generation drying device that operates under vacuum conditions while the double‑cone vessel rotates continuously. This unique design ensures that materials are gently tumbled and uniformly heated, achieving rapid and consistent drying without thermal degradation.
Unlike conventional drying ovens that can cause material caking or uneven moisture removal, this equipment uses indirect heating through a jacketed vessel. Heat is transferred from the jacket to the inner shell, and the vacuum system lowers the boiling point of solvents, enabling efficient drying at low temperatures.
The drying process follows three continuous stages:
A heating medium (hot water, low‑pressure steam, or thermal oil) circulates through the sealed jacket, transferring heat to the material via the inner shell.
The vessel rotates slowly (typically 4–6 RPM), causing the material to tumble and constantly renew contact with the heated wall surface, maximizing heat exchange efficiency.
Under vacuum (design pressure -0.1 to 0.15 MPa), the vapor pressure drops, causing surface moisture to evaporate at lower temperatures. The evaporated solvent is drawn out by a vacuum pump and can be recovered through a condensing system.
These three processes occur simultaneously and continuously, achieving drying in a significantly shorter time compared to conventional dryers.
Because the system operates under vacuum, drying occurs at much lower temperatures (20–160°C). This makes it ideal for heat‑sensitive biochemical products, pharmaceuticals, and materials that cannot withstand high heat.
Thermal efficiency is more than twice that of ordinary dryers. The combination of indirect heating and continuous tumbling ensures maximum heat utilization.
Indirect heating means the material never comes into direct contact with the heating medium. Additionally, the closed system protects sensitive materials from oxidation and contamination.
All internal and external surfaces are polished (SUS304/316L stainless steel) to eliminate dead corners, making cleaning easy and meeting strict GMP requirements for pharmaceutical and food applications.
The vacuum system, combined with a low‑temperature condenser, allows efficient recovery of organic solvents, saving production costs and reducing environmental pollution.
The equipment uses belt‑chain dual elastic coupling, ensuring stable operation and excellent concentricity between the two shafts. Rotary joints from U.S. technology ensure reliable sealing for both heat medium and vacuum systems.
For adhesive or sticky raw materials, we can specially design a "copy board" mechanism or install balls inside the tank to prevent material agglomeration.
| Model | Total Volume (L) | Working Volume (L) | Heating Area (m²) | Speed (rpm) | Power (kW) | Rotary Height (mm) | Weight (kg) |
| SZG-100 | 100 | ≤50 | 1.16 | 4–6 | 0.75 | 1750 | 800 |
| SZG-350 | 350 | ≤175 | 2.00 | 4–6 | 1.1 | 2100 | 1100 |
| SZG-500 | 500 | ≤250 | 2.63 | 4–6 | 1.5 | 2250 | 1200 |
| SZG-750 | 750 | ≤375 | 3.50 | 4–6 | 2.0 | 2490 | 1500 |
| SZG-1000 | 1000 | ≤500 | 4.61 | 4–6 | 3.0 | 2800 | 2800 |
| SZG-1500 | 1500 | ≤750 | 5.58 | 4–6 | 3.0 | 2940 | 3300 |
| SZG-2000 | 2000 | ≤1000 | 7.50 | 4–6 | 4.0 | 2990 | 3600 |
| SZG-3500 | 3500 | ≤1750 | 9.60 | 4–6 | 5.5 | 3490 | 6400 |
Vessel design pressure: -0.1 to 0.15 MPa | Jacket design pressure: ≤ 0.3 MPa | Operating temperature: Tank ≤85°C, Jacket ≤140°C
The Double Cone Rotary Vacuum Dryer is widely used for drying, mixing, and concentrating powder, granular, and fibrous materials in:
Pharmaceutical Industry – Drying of biochemical products, active pharmaceutical ingredients (APIs), and heat‑sensitive compounds
Chemical Industry – Drying of catalysts, pigments, dyes, and intermediates, especially those prone to oxidation or with strong irritancy
Food Industry – Low‑temperature drying of food additives, flavorings, and nutritional ingredients
Battery Materials – Drying of lithium iron phosphate, lithium titanate, and other cathode/anode materials where moisture control is critical
Solvent Recovery Applications – Processes requiring recovery of volatile organic solvents
We understand that every process is unique. We offer flexible customization to meet your specific requirements:
Material of Construction – SUS304, SUS316L, Titanium, or Carbon Steel
Heating Source – Steam, hot water, thermal oil, or electric heating
Control System – Stepless speed regulation and constant temperature control available (SZG‑A series)
Capacity – From 100L to 6000L total volume
Special Features – Anti‑stick design, enhanced mixing blades, or automatic data recording and fault alarm functions
Professional Manufacturer – Specialized in drying equipment with hundreds of units supplied annually
Quality Assurance – CE, ISO9001, and GMP certifications
Technical Expertise – Over 20 years of service life and reliable performance
Comprehensive Service – Video technical support, factory inspection reports, and 1‑year warranty
Address:China,Yanjin county forest park gate to the west 1000 meters north road.
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