Thin Film Evaporator

Thin Film Evaporator

Thin Film Evaporators are vertical, mechanically operated continuous film evaporators designed for difficult concentration processes and heat-sensitive materials. They allow operations like distillation, evaporation, and stripping in a single unit.

This technology is ideal for removing volatile components from viscous, foaming, or solid-containing materials while maintaining product integrity. A uniform thin film is formed on the smooth heated surface of the glass body, enhancing evaporation efficiency with short residence times.

Overview

• Mechanically operated with a rotating wiper system
• Thin film formation for maximum surface area contact
• Suitable for heat-sensitive, viscous, and foaming liquids
• Widely used in Fine Chemicals, Pharmaceuticals, Foods & Beverages

Working Principle

• Feed enters the vertical glass tube.
• The rotating wipers spread the liquid into a thin film over the heated surface.
• Heat from the jacket evaporates the volatile components.
• Vapors are removed under vacuum and condensed in the condenser.
• Concentrated product is collected at the bottom.

This method ensures gentle processing, high heat transfer efficiency, and prevents fouling or dry spots.

Salient Features & Benefits

• Maximum evaporation in a single pass
• Fully corrosion-resistant roller-wiper system ensures homogeneous liquid film
• Minimal degradation of thermally unstable products
• Can handle high viscosity products
• High surface-to-volume ratio for efficient heat transfer
• Uniform film formation → higher heat flux, no dry spots, no fouling
• Easy cleaning, installation, and maintenance
• Precise processing with adjustable wiper speed

Technical Specifications

Parameter	Specification
Evaporation Surface Area	DN-80 × 0.15 m² to DN-150 × 0.5 m²
Maximum Product Temperature	200°C
Maximum Jacket Temperature	230°C
Jacket Pressure	Up to 2.0 bar (g)
Operating Vacuum	5 mmHg to 0.005 mmHg
Material of Wetted Parts	Borosilicate Glass Tube, PTFE
Product Type	Heat-sensitive, viscous, foaming, or solid-containing liquids
Mounting	Vertical, skid-mounted or modular frame
Cleaning	Easy disassembly and wash

Construction Details

• Glass Body: High-precision borosilicate glass tube
• Wipers: Corrosion-resistant PTFE or SS316 coated
• Jacket: Thermal oil or steam-compatible
• Vacuum Interface: Standard flanges for vacuum pump integration
• Frame: Modular skid or fixed installation

Applications

• Fine Chemicals & Specialty Chemicals
• Pharmaceuticals & Herbal Extracts
• Food & Beverage Concentrates
• Heat-sensitive solvent removal
• High-viscosity product processing

Optional Accessories & Modules

• Vacuum pump for precise pressure control
• Condensers (coil, shell & tube) for solvent recovery
• Digital temperature controllers for jacket and product
• Feed pumps for continuous operation
• Modular skid integration with downstream units

Installation & Integration

• Suitable for pilot plants, R&D, and industrial-scale production
• Skid-mounted units allow easy relocation and integration
• Compatible with standard vacuum pumps, chillers, and condensers