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Wuxi Yiteng Pressure Vessel Co, Ltd.
Add：No 58, Zhenyang Road, Qingyang Town, Jiangyin, Jiangsu
Contacts：Mr. Zhang
Tel：13506192042
Fax：0510-86557866
Website：www.yitengrq.com
E-mail：wxzhangyaodong@163.com / yeekai@yitengrq.com

Thin-Film Evaporator

Thin-Film Evaporator Technical Details

I. Equipment Overview

A thin-film evaporator is a high-efficiency evaporation device that uses a rotor to spread liquid into an ultra-thin film (0.1-1.0 mm) on a heated surface for rapid evaporation and separation. Its key features include:

High Heat Transfer Efficiency: Thin film enables heat transfer coefficients of 2000-6000 W/(m²·K)
Short Residence Time: Material exposure to heat is seconds-long (typically <10 seconds)
High Vacuum Compatibility: Stable operation at ≤1 mbar high vacuum

2.Core Structure

1.Heating Jacket: Typically heated by steam, thermal oil, or hot water
2.Rotor System:
- o Wiper types: Hinged/fixed/sliding blades
- o Speed range: 100-800 rpm (frequency-controlled)
3.Separator: Internal/external vapor-liquid separation device
4.Material Combinations:
- o Product contact parts: SS316L, Hastelloy, titanium
- o Heating jacket: Carbon steel (Q345R), SS304

3.Technical Parameters

Parameter	Typical Range	Remarks
Evaporation Capacity	5-5000 kg/h	Depends on material properties and ΔT
Operating Pressure	Atmospheric ~ 0.001 mbar	High vacuum models require booster pumps
Operating Temperature	50-300°C	High-temperature models up to 350°C
Heat Transfer Area	0.1-100 m²	Custom designs available
Wiper Tip Speed	2-15 m/s	Affects film thickness and heat transfer
Motor Power	1.1-55 kW	Correlates with rotor diameter and viscosity
Viscosity Range	1-50,000 cP	High viscosity requires special wipers

4.Unique Advantages

1.Thermal Sensitivity Handling:Short residence time + high vacuum ideal for antibiotics, vitamins, plant extracts
2.High Viscosity Processing: Handles materials up to 50,000 cP (e.g., polymers, resins)
3.Self-Cleaning Capability: Continuous wall scraping prevents fouling and scaling

5.Application Fields

Pharmaceutical Industry: Antibiotic concentration, solvent recovery (e.g., methanol, DMF)
Food Industry: Juice concentration, flavor extraction
Chemical Industry: Polymer devolatilization, monomer purification
Environmental Protection: High-concentration wastewater reduction

6.Selection Considerations

1.Material Properties: Viscosity, thermal sensitivity, boiling point, solid content
2.Process Requirements: Evaporation rate, inlet/outlet concentration, temperature sensitivity
3.Material Compatibility: Corrosive/abrasive materials require special alloys
4.Energy Optimization: Multi-effect integration or MVR (Mechanical Vapor Recompression) systems

Thin-film evaporators are the preferred choice for high-value material separation. Although initial investment is high, cost recovery is typically achieved within 1-3 years through energy savings and product quality improvements.