Patented MVR Based Low Temperature Evaporator

Name: MVR-Based Low Temperature Evaporator (LTE®) — Patented
Brand: SED — Spray Engineering Devices

MVR-Based Low-Temperature Evaporator (LTE®)

SED’s patented MVR Low Temperature Evaporator (LTE®) is an advanced plate-type falling film evaporator system that utilizes Mechanical Vapor Recompression (MVR) to treat wastewater or concentrate thermosensitive liquids at low temperatures (typically 40°C–65°C) under vacuum conditions. This highly energy-efficient technology is most effective for clean water recovery, achieving volume reduction, and often supporting zero-liquid-discharge (ZLD) processes, making it a sustainable and environmentally responsible solution.

Working Principle

Feed Distribution

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

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 the heat transfer coefficient.

Evaporation Terminology

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

MVR (Mechanical Vapor Recompression)

Vapor generated during evaporation is drawn into an electrically driven mechanical compressor, which increases its pressure and temperature, recycling it as the heating medium. This recompressed vapor is fed back to the plate heat exchanger, replacing the need for external steam. The process is highly energy-efficient, requiring only 10–20 kWh per ton of water evaporated.

Clean Water Recovery

Compressed vapor gets condensed in the calandria of the plate heat exchanger; thus, condensate is recovered as clean water.

Waste Heat Recovery

Heat of condensate and concentrated liquid is recovered through feed preheaters to make the system highly energy efficient.

Why Choose MVR-based LTE®?

Among modern solutions offered by MVR evaporator manufacturers in India, MVR based LTE® stands out for its exceptional energy efficiency, sustainability, and operational reliability.

Highly Energy Efficient

MVR recycles vapor energy, requiring only 10–15 kWh per ton of water evaporated - far less than traditional multi-effect evaporators.

Boiler-less Operation

Ideal for industries without boilers, enabling simple and efficient wastewater treatment. Simplified infrastructure significantly reduces the space requirement, fuel storage, & water treatment systems for greenfield projects.

Sustainable & Environmental Compliance

MVR operation reduces greenhouse gas emissions by up to 90% compared to steam-driven systems, supporting sustainable water management and ZLD goals.

Compact Footprint

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

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.

Easy Installation

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

24x7 Remote Operational Support

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

Highly Cost-Effective

Lowering operating cost (energy, consumables & maintenance) to less than $1 per ton of treated water.

High-Quality Distillate

Produces clean condensate (low TDS) for reuse, reducing freshwater demand and environmental impact.

Highly Energy Efficient

MVR recycles vapor energy, requiring only 10–15 kWh per ton of water evaporated - far less than traditional multi-effect evaporators.

Easy Installation

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

Boiler-less Operation

24x7 Remote Operational Support

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

Sustainable & Environmental Compliance

MVR operation reduces greenhouse gas emissions by up to 90% compared to steam-driven systems, supporting sustainable water management and ZLD goals.

Highly Cost-Effective

Lowering operating cost (energy, consumables & maintenance) to less than $1 per ton of treated water.

Compact Footprint

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

High-Quality Distillate

Produces clean condensate (low TDS) for reuse, reducing freshwater demand and environmental impact.

Automated Control

Salient features

Vacuum-enabled evaporation at 40°C–65°C minimizes corrosion, volatile emissions, and energy loss, ideal for wastewater and thermosensitive liquids.

Reduces wastewater volume by 80–95%, concentrating solids for easier disposal or recovery, supporting sustainable ZLD goals.

Plate design and turbulent flow handle high-TDS effluents with minimal downtime.

Modular systems fit various scales starting from 10 KLD and are easily scalable to 10 MLD.

Automated CIP and advanced predictive maintenance ensure high uptime and operational reliability.

Variable-speed compressors and pumps provide a high turn-down ratio.

Flexibility to absorb shock loads occurring due to changes in feed characteristics (pH, TDS, BOD, COD, etc.).

Harnessing the Power of Vapor Compression

MVR technology compresses and recycles vapor within the system, reducing energy consumption while maintaining high water recovery rates. (add space here)This makes LTE® not only cost-efficient but also sustainable, contributing to a greener industrial footprint.

Applications Across Industries

As an established evaporator manufacturer in India, SED delivers customized LTE® systems for a wide range of industrial applications.

Textiles

Reduce wastewater and recycle clean water.

Pharmaceuticals & Chemicals

Achieve ZLD and reduce operational costs.

Electroplating

Recover water from high-strength effluents.

Distilleries & Breweries

Treat spentwash and RO rejects efficiently.

Sugar & Jaggery Production

Boiler-free, zero-emission sugarcane processing.

LTE® Patent Certificate

Innovation has always been at the core of SED. The MVR Low Temperature Evaporator (LTE®) is backed by a granted patent, reinforcing SED’s commitment to developing proprietary technologies that improve energy efficiency, water recovery, and sustainable industrial processes. The patent certificate below highlights the official recognition of this innovation.

Patent Number

435676

Grant Date

05 June 2026

Patent Title

Method, Process and Apparatus for a Very Low Temperature Evaporation System

Organization

Spray Engineering Devices Limited (SED)

View Patent Certificate

Frequently Asked Questions

It recycles vapor as the heating medium, reducing steam consumption and lowering energy use to 10-20 kWh per ton of water evaporated.

LTE® is widely used in textiles, chemicals, pharmaceuticals, distilleries, food processing, electroplating, sugar, and other industries requiring wastewater concentration or water recovery.

Yes, it recovers clean water while concentrating wastewater, making it a key technology for achieving ZLD and regulatory compliance.

The right LTE® is selected based on wastewater characteristics, evaporation capacity, water recovery targets, energy efficiency, automation requirements, and lifecycle operating costs.

SED offers patented MVR based LTE® technology with low energy consumption, high water recovery, compact design, automation, and customized solutions for diverse industries.

Revolutionizing Water Recovery. Setting New Standards.

Join the sustainability movement. Optimize water usage, reduce costs, and contribute to a greener future with SED’s MVR-based LTE®.

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MVR-based LTE® - SED Flagship Technology