Double Cone Vacuum Dryer

 

The Double Cone Vacuum Dryer achieves uniform drying and gentle mixing of materials through double-cone rotation in a low-temperature vacuum environment. It is particularly well-suited for heat-sensitive, easily oxidized, toxic, hazardous, or high-value-added powders and granular materials, and is widely used in the pharmaceutical, chemical, and food industries.

 

 

1. Vacuum Environment Creation: A vacuum pump evacuates air from the vessel to establish a vacuum level of -0.08 to -0.098 MPa, significantly lowering the boiling point of the moisture (water/solvent) within the material (e.g., the boiling point of water is approximately 45°C at 10 kPa).
2. Indirect Heating: Steam, hot water, or thermal oil is circulated through the jacket, transferring heat evenly to the material via the vessel's inner wall.
3. Dynamic Mixing and Drying: A motor drives the vessel to rotate at 3–12 rpm; the material continuously tumbles-moving up and down as well as inward and outward-within the double-cone structure, ensuring contact with the vessel wall without dead zones and resulting in high heat transfer efficiency (heat transfer coefficient U = 116–140 W/(m²·K)).
4. Moisture Removal: Evaporated water vapor or solvent vapor is continuously extracted through the vacuum pipeline, achieving efficient drying.

 

 

System	Core components	Feature Description
Double-cone tank body	Double-cone shell + jacket	Material quality: SUS304/316L, inner surface impermeability Ra≤0.8μm, 0.3MPa and force level 0.3MPa.
Slewing system	Motor + Gear Reducer + Coupling + Bearing	Variable-frequency speed control (3–20 r/min) ensures uniform material agitation and prevents accumulation on the vessel walls.
Vacuum system	Vacuum pump + vacuum valve + condenser + trap	Ultimate vacuum ≤133 Pa; condenser recovers organic solvents, meeting environmental protection requirements.
Heating system	Jacket + temperature control unit + heat transfer medium	Temperature range: 20–160°C; accuracy: ±2°C; heating medium options: steam, hot water, thermal oil, or electric heating.
Discharge system	Butterfly Valve / Ball Valve + Sealing Device	Rapid discharge with no residue; IP65 sealing rating ensures stable vacuum levels.
Control system	PLC + Touchscreen + Sensor	Automatic control of temperature, vacuum level, and rotational speed; data recording and traceability compliant with GMP requirements.

 

 

Model Project	SZG 100	SZG 200	SZG 350	SZG 500	SZG 750	SZG 1000	SZG 1500	SZG 2000	SZG 3000		SZG 4500
Total volume L	100	200	350	500	750	1000	1500	2000	3000		4500
Working volume L	50	100	175	250	375	500	750	1000	1500		2250
Heating area m²	1.16	1.5	2.0	2.63	3.5	4.61	5.58	7.5	9.6		13.8
Speed T.p.m	6									4	4
Power Kw	0.75	1.1	1.5	1.5	2	3	3	4	5.5			7.5
Height of rotating frame m m	1810	1910	2090	2195	2500	2665	2915	3055	3330			4210
Machine weight Kg	550	700	900	1100	1200	1300	1500	2000	3000			4000
Design pressure in tank MPa	-0.09~0.096
Sandwich design pressure MPa	0.3

 

 

 

Our Double Cone Vacuum Dryer offers numerous advantages, with the following features standing out in particular:

1. Low-Temperature Drying Protection: Vacuum operation enables drying at low temperatures (40–80°C), preventing the decomposition or oxidation of heat-sensitive components.

2. High Efficiency and Energy Savings: Thermal efficiency is more than double that of conventional ovens, and indirect heating prevents material contamination.

3. Superior Uniformity: The combination of double-cone rotation and a vacuum environment ensures drying uniformity within ±1%, eliminating localized overheating or undried "dead zones."

4. Sealed Safety: Fully enclosed operation makes it suitable for toxic, hazardous, flammable, or explosive materials, while low oxygen levels (<3%) reduce the risk of oxidation.

5. Multifunctional Integration: Simultaneous drying and mixing reduce processing steps; the system is also suitable for applications requiring solvent recovery.

6. Easy Cleaning and Maintenance: With no internal agitation mechanisms and smooth inner walls, the unit facilitates CIP/SIP cleaning and complies with pharmaceutical industry hygiene standards.

 

 

Double Cone Vacuum Dryers are widely used in the following fields:
1. Biopharmaceuticals: Active Pharmaceutical Ingredients (APIs), antibiotics, biological products, traditional Chinese medicine extracts, etc.
2. Fine Chemicals: Dyes, pigments, catalysts, resins, pesticides, etc.
3. Food Products: Food additives, probiotics, health supplements, fruit powders, etc.
4. Energy Materials: Lithium battery materials, ceramic powders, metal powders, etc.
5. Others: Rare earth materials, nuclear industry raw materials, flammable and explosive substances, etc.

 

Nanjing Mengbo Environmental Technology Co., Ltd. is a Double Cone Vacuum Dryer manufacturing business, and if you have any demand in any area, please let us know, and we will provide you with the best option!

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