Double Cone Dryer
Drying Equipment
1. Product Overview
The double-cone dryer is a rotary vacuum unit that combines drying with vacuum mixing. It is built around a double-cone rotating vessel together with a vacuum system, heating system, drive system, and frame. It is widely used to dry powder and granular materials in pharmaceutical intermediates, fine chemicals, agrochemicals, and food. Key features include continuous tumbling and blending for even heating, no dead zones, sealed operation that prevents oxidation, and complete discharge with no residual material.
2. Working Principle
Wet material is charged into the double-cone vessel and the system is evacuated. The drive rotates the vessel at low speed, continuously tumbling the material up and down. Heating medium—steam or hot water—circulates through the jacket to warm the vessel wall. The material makes full contact with the heated wall, and moisture vaporizes at low temperature under vacuum. The resulting vapor is drawn off by the vacuum pump through the exhaust line and condensed for collection.
3. System Classification
by Heating Medium:
Steam-Heated Double-Cone Dryer: Steam circulates through the jacket for fast heating and high temperatures / Suitable for heat-resistant materials; requires a boiler.
Hot-Water-Heated Double-Cone Dryer: Circulating hot water through the jacket gives precise temperature control / Ideal for heat-sensitive or easily scorched materials.
Electric Double-Cone Dryer: Electric heating rods built into the jacket remove the need for a boiler / Designed for pilot trials or sites without steam supply.
4. Detailed Technical Parameters
4.1 Common Materials
| Material | Suitable Media | Remarks |
|---|---|---|
| 304 Stainless Steel | Chemical and food-grade media | Easy to clean, with good general corrosion resistance |
| 316L Stainless Steel | Pharmaceutical-grade and strongly corrosive media | Compliant with GMP, with excellent corrosion resistance |
| Carbon Steel Q235B | Non-corrosive, non-food materials | Inner surface requires anti-corrosion treatment |
4.2 Typical Specification Table
| Total Volume (L) | Loading Factor | Jacket Pressure | Cylinder Speed | Motor Power |
|---|---|---|---|---|
| 100～500 | 0.4～0.5 | 0.2～0.4MPa | 3～10 | 1.5～4 |
| 500～2000 | 0.4～0.5 | 0.2～0.4MPa | 3～8 | 4～11 |
| 2000～5000 | 0.4～0.5 | 0.2～0.4MPa | 2～6 | 11～22 |
4.3 Design Conditions & Performance
| Parameter | Specification |
|---|---|
| Cylinder Vacuum Level | -0.096～-0.099MPa |
| Heating Temperature | ≤150℃ (Hot water/Steam) |
| Drying Time | 4～12 hours (depends on initial moisture) |
| Loading Capacity | 30%～50% of total volume |
5. Electrical Parameters
| Region | Voltage | Frequency |
|---|---|---|
| China/Russia/Central Asia | 380V | 50Hz |
| Middle East/Southeast Asia/Africa | 400V / 415V | 50Hz |
| South Korea | 380V | 60Hz |
| Americas (if required) | 440V / 480V | 60Hz |
| Note: The gearmotor and vacuum-pump motor voltages and frequencies must be specified. |
6. Core Component Selection
| Component | Brand/Material | Features & Applications |
|---|---|---|
| Vessel | Custom fabricated | 304/316L stainless steel, internal surface polished to Ra≤0.4 μm, no dead corners |
| Rotary Union | Custom matched | Stainless steel or brass; withstands alternating vacuum and pressure; leak-tight |
| Mechanical Seal | Custom matched | PTFE or Viton; maintains the required vacuum level |
| Gear Reducer | GB-standard / Cycloidal | Smooth transmission with high load capacity |
7. Typical Application Fields
Pharmaceutical Industry: drying of APIs and intermediates
Chemical Industry: fine chemicals, dyes, and pigments
Food Industry: starch and protein powder
Metallurgical Industry: metal powders
8. Design Standards & Certifications
| Standard | Description |
|---|---|
| GB 150-2011 | Pressure Vessels (jacket and cylinder) |
| ISO 9001:2015 | Quality Management System |
| GMP | Good Manufacturing Practice |
| CE / EAC / GOST-R | Available upon request for international orders |
9. Custom Optional Configurations
| Option | Details |
|---|---|
| Heating Method | Steam / Hot water / Thermal oil / Electric |
| Vacuum System | Water ring pump / Roots pump / Rotary vane pump + Condenser |
| Control Method | Manual buttons / PLC + touch screen auto temp/speed control |
| Special Design | Internal lump-breaking bars / Explosion-proof / Sterile SIP-CIP |
10. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| Brand New | 12 months | Vessel & jacket, drive system, sealing system |
| Refurbished | 6 months | Vessel & jacket, drive system, sealing system |
| Idle | 3 months | Main functional components |
11. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Vessel / Frame | Steel-strap bundled, nude, or wrapped with tarpaulin |
| Motor / Vacuum Pump | Fully enclosed wooden cases |
| Electrical / Instruments | Waterproof sealed packaging in wooden cases |
| Container or bulk shipping. On-site installation and commissioning guidance available. |
12. Information Required for Inquiry
12. Information Required for Inquiry Material name and initial/final moisture content; bulk density and form (powder/granule/viscous); batch capacity or total volume required; drying temperature limits; solvent type (recovery required or not); preferred equipment condition (new/refurbished/idle); delivery terms (FOB/CIF/DDP); and destination port.