SED - Spray Engineering Devices Ltd Limited
Plate Type Falling Film Evaporator

Plate Type Falling Film Evaporator (PTFFE)

A Plate Type Falling Film Evaporator (PTFFE) is a compact, modular and highly energy-efficient heat exchange system accommodated in minimum footprint area and widely used for concentrating liquids in industries such as sugar, food processing, chemicals, wastewater etc.

When integrated with Mechanical Vapor Recompression (MVR), PTFFEs significantly reduce energy consumption and operational costs by enabling evaporation at minimal temperature differences often as low as 1°C.

Sugar Mill Modern
How It Works

Working Principle

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Feed Distribution

The liquid is evenly distributed across the top of the plate pack bunch through SED’s innovative designed distributor forming a thin falling film over the heating surface.
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Heat Transfer

Heating media (typically low-pressure vapor or steam) flows horizontally across the plates, while the process fluid flows vertically downward where specially designed patterns enhance turbulence and maximize heat transfer coefficient.
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Evaporation Terminology

As the film descends, heat is transferred through the plate walls, causing rapid evaporation of water or solvents from the liquid.
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MVR Integration

Furthermore, integration with MVR technology eliminates external steam requirement and enables boiler-less operation.

Why Choose MVR-based LTE®?

01

Highly Energy Efficient

Operates with minimal temperature difference (~1°C), significantly lowering steam consumption.


02

Compact Footprint

Achieves a large heating surface area within a minimal footprint, and is further scalable, reducing space and structural requirements for installation.


03

Short Residence Time

Minimizes heat exposure for sensitive liquids, preserving product quality.


04

Easy Installation

Easy transport and quick assembly with a compact, self-supported design that requires minimal civil work, structure, and erection time.


05

Automated Control

Advanced automation enables complete equipment control, preventive maintenance alarms, and enhanced safety measures, including CIP (Cleaning-In-Place), from the DCS (Distributed Control System) with no manual intervention.


06

24x7 Remote Operational Support

Continuous online monitoring, assistance, and control to ensure uninterrupted performance, quick troubleshooting, and optimal operation of equipment from anywhere.


Salient Features

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Up to 3x higher Heat Transfer Coefficient (HTC) compared to traditional tubular falling film evaporators.

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Multi-effects can be accommodated in a single modular shell, simplifying design and reducing piping complexity.

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Specially pressed and welded plate packs offer superior durability and thermal performance.

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For challenging liquids, a wide range of material options - such as SS304, SS316, and Titanium - are available to ensure compatibility and durability.

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Ideal for greenfield and brownfield projects looking to boost profitability through energy optimization.

Sugar Factory
How It Works

Applications Across Industries

SED’s PTFFE delivers reliable, energy-efficient evaporation for a variety of sectors:

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Sugar & Distillery

Concentration of juice, syrup, and alcohol with minimal color loss.
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Food & Dairy

Gentle evaporation preserving flavor and nutritional quality.
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Chemical Processes

Efficient concentration of solvents and reactants.
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Wastewater Treatment

High-performance effluent concentration.
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Bio-based & Green Chemistry

Energy-optimized processing of biomass and renewable products.

Why Partner with SED?

SED combines innovation with reliability. Our PTFFE solutions are engineered not just as products, but as long-term collaborations to:

  • Reduce energy intensity and operational costs
  • Increase throughput and process sustainability
  • Modernize plants with modular, future-ready design

Frequently Asked Questions

Revolutionizing Efficiency. Redefining Standards.

Step into the future of evaporation with SED’s Plate Type Falling Film Evaporator — engineered for energy savings, operational reliability, and sustainable performance.