Evaporators – Advanced Industrial Concentration Solutions

Efficient, High-Performance Evaporation Systems for Process Industries

Evaporator - NORDSTONE.

Introduction

Evaporators are essential process equipment designed to remove solvent (usually water) from a solution, suspension, or chemical mixture by evaporation, thereby concentrating the desired product. They play a critical role in chemical, food & beverage, pharmaceutical, and industrial processes, ensuring energy efficiency, process consistency, and high product quality.

At NORDSTONE., we specialize in custom-engineered evaporators, built to withstand high temperatures, pressures, and corrosive environments, and comply with ASME, BIS, IS, and international standards.

What are Evaporators?

Evaporators are heat exchange systems specifically designed to concentrate solutions by evaporating the solvent, typically water, leaving behind a more concentrated product. These systems are crucial in industries where concentration, purification, or volume reduction is required. The choice of evaporator type depends on product characteristics, required concentration levels, energy efficiency goals, and process conditions.

Key components include:

  • Heat transfer surface (tubes, plates, or coils)
  • Vapor-liquid separation chamber
  • Condensers for vapor recovery
  • Feed and product pumps
  • Vacuum system (if applicable)
  • Instrumentation and control systems
  • Cleaning and maintenance access

Our evaporators are engineered for maximum concentration efficiency, product quality preservation, and reliable operation in demanding industrial environments.

Types of Evaporators

Falling Film Evaporator

Features:
  • Liquid flows as thin film along vertical tube walls
  • Steam or hot vapor surrounds tubes externally
  • Materials: Stainless steel, titanium, alloys
  • Optional: Multi-effect design, vacuum operation
Applications:
  • Fruit juice concentration
  • Dairy product processing
  • Sugar solutions concentration
  • Pharmaceutical solutions
Advantages:
  • Gentle processing for heat-sensitive liquids
  • High heat transfer efficiency
  • Low residence time reduces degradation
  • Minimal thermal damage to products
Technical Specifications:
  • Heat duty: 0.1 MW to 10 MW
  • Evaporation capacity: 100-50,000 kg/h
  • Operating temperature: 40°C to 120°C
  • Vacuum operation: Down to 0.1 bar absolute
Limitations:
  • Not suitable for highly viscous liquids
  • Limited for fouling liquids
  • Requires uniform feed distribution

Rising Film Evaporator

Features:
  • Liquid enters at bottom, rises through tubes
  • Thin film vaporizes during upward travel
  • Materials: Stainless steel, carbon steel, alloys
  • Optional: Multi-effect configuration, preheaters
Applications:
  • Chemical processing
  • Solvent recovery
  • Industrial water evaporation
  • Medium viscosity solutions
Advantages:
  • Simple design and easy maintenance
  • Efficient for low-viscosity solutions
  • Operates under gravity-driven flow
  • Low capital cost
Technical Specifications:
  • Heat duty: 0.5 MW to 20 MW
  • Evaporation capacity: 500-100,000 kg/h
  • Operating pressure: 0.2 to 10 bar
  • Tube length: 3m to 10m

Plate Evaporator

Features:
  • Uses corrugated plates for high surface area
  • Compact and efficient design
  • Materials: Stainless steel, titanium, alloys
  • Optional: CIP compatibility, multi-stage design
Applications:
  • Dairy industry concentration
  • Food processing
  • Pharmaceutical concentration
  • Small to medium-scale operations
Advantages:
  • Compact and space-saving
  • High heat transfer coefficient
  • Easy cleaning and maintenance
  • Flexible plate arrangement
Technical Specifications:
  • Heat duty: 0.05 MW to 5 MW
  • Evaporation capacity: 50-20,000 kg/h
  • Plate material thickness: 0.5-1.2 mm
  • Heat transfer area: 5-500 m²

Shell & Tube Evaporator

Features:
  • Conventional shell & tube construction
  • Liquid flows through tubes, steam outside
  • Materials: Carbon steel, stainless steel, alloys
  • Optional: Multi-pass configuration, condensers
Applications:
  • Sugar refining
  • Chemical concentration
  • Wastewater treatment
  • Brine concentration
Advantages:
  • Handles high-viscosity liquids
  • Robust and long-lasting
  • Flexible design for various capacities
  • High thermal efficiency
Technical Specifications:
  • Heat duty: 1 MW to 50 MW
  • Evaporation capacity: 1,000-500,000 kg/h
  • Operating pressure: Up to 30 bar
  • Shell diameter: 0.5m to 3m

Forced Circulation Evaporator

Features:
  • Uses pump to circulate liquid through exchanger
  • Ensures uniform temperature distribution
  • Materials: Stainless steel, alloys, titanium
  • Optional: Vacuum operation, CIP capability
Applications:
  • Molasses concentration
  • Chemical reactor solutions
  • Polymer solutions
  • Food industry viscous products
Advantages:
  • Prevents scaling and fouling
  • Handles viscous and crystallizing liquids
  • High reliability for continuous operation
  • Uniform concentration throughout
Technical Specifications:
  • Heat duty: 2 MW to 100 MW
  • Evaporation capacity: 2,000-1,000,000 kg/h
  • Circulation velocity: 1-3 m/s
  • Pump power: 10-500 kW
Limitations:
  • Higher initial cost due to circulation system
  • Higher energy consumption
  • More complex piping arrangement

Key Features of Evaporators

High Thermal Efficiency

  • Optimized tube/plate arrangements
  • Multi-effect configurations for steam economy
  • Counter-flow or co-current flow designs
  • Heat recovery systems integration

Durable Construction

  • Stainless steel, carbon steel, titanium
  • Corrosion and abrasion-resistant alloys
  • High-pressure and temperature capability
  • Fouling-resistant surfaces

Customizable Design

  • Capacities from lab scale to industrial
  • Single-effect or multi-effect configurations
  • Vacuum or atmospheric operation
  • Modular and skid-mounted designs

Safety & Monitoring

  • Temperature, pressure, and level sensors
  • ASME Section VIII, BIS, IS compliance
  • Safety relief valves and rupture discs
  • SCADA/BMS integration capability

Material Options

  • Stainless Steel: 304, 316, 316L
  • Carbon Steel: SA516, SA285
  • Titanium: Grade 2, Grade 7
  • Alloys: Hastelloy, Inconel, Monel

Operational Flexibility

  • Handles heat-sensitive products
  • Processes viscous, foaming, crystallizing liquids
  • Continuous or batch operation
  • Low-maintenance design

Design & Engineering Specifications

Thermal Design

  • Heat duty: 0.05 MW to 100 MW
  • Evaporation rate: 50-1,000,000 kg/h
  • Steam economy: 0.5-5.0 (multi-effect)
  • Operating temperature: 40°C to 180°C
  • Concentration factor: 2x to 20x

Mechanical Design

  • Design pressure: Up to 30 bar
  • Design temperature: -20°C to 200°C
  • Tube diameters: 1/2" to 2"
  • Shell diameters: 0.3m to 3.5m
  • Heat transfer area: 5-5,000 m²

Standards Compliance

  • ASME Section VIII - Pressure Vessels
  • TEMA Standards - Heat Exchangers
  • 3-A Sanitary Standards (food/pharma)
  • FDA/CE requirements
  • BIS/IS Standards - Indian applications

Applications

Food & Beverage
  • • Fruit juice concentration
  • • Dairy product processing
  • • Sugar solutions
  • • Flavor concentrates
Pharmaceutical & Biotechnology
  • • Solvent evaporation
  • • Active ingredient concentration
  • • Vaccine production
  • • API concentration
Chemical & Petrochemical
  • • Solvent recovery
  • • Brine concentration
  • • Polymer solutions
  • • Chemical intermediates
Industrial Waste Management
  • • Wastewater treatment
  • • Effluent concentration
  • • Zero liquid discharge
  • • Sludge concentration
Sugar & Molasses Industry
Sugar Refining

• Juice concentration
• Syrup evaporation
• Crystallization feed

Molasses Processing

• High viscosity handling
• Energy efficient design
• Continuous operation

By-Products

• Bioethanol feed
• Animal feed production
• Organic fertilizer

Quality Assurance & Testing

All Evaporators undergo rigorous QA/QC procedures:

Pressure & Leak Testing
  • Hydrostatic testing to 1.5x design pressure
  • Pneumatic testing for leak detection
  • Vacuum testing for evaporator bodies
  • Thermal performance validation
Non-Destructive Testing
  • Ultrasonic testing (UT) for weld integrity
  • Radiographic testing (RT) for critical welds
  • Dye penetrant inspection
  • Magnetic particle inspection
Certification & Documentation
  • Material traceability (MTC – EN 10204 3.1)
  • ASME U, U2, or UM stamps
  • 3-A, FDA, CE certifications
  • Third-party inspection (TUV, BV, Lloyds, DNV, SGS)

Optional Features & Customization

  • Multi-effect or multi-stage evaporation for enhanced efficiency
  • Vacuum operation for low-temperature evaporation
  • CIP (Cleaning-in-Place) for hygiene-critical applications
  • Agitators, circulation pumps, and spray devices
  • Modular or skid-mounted designs for compact installation
  • Heat recovery systems and economizers
  • Automated control systems with PLC/SCADA
  • Sanitary finishes for food and pharmaceutical applications

Why Choose NORDSTONE.?

  • 20+ years of experience in design, fabrication, and installation of industrial evaporators
  • ASME/BIS/IS-certified units for chemical, food, pharmaceutical, and industrial applications
  • Custom-engineered solutions for Falling Film, Rising Film, Plate, Shell & Tube, and Forced Circulation Evaporators
  • Advanced thermal design, corrosion-resistant materials, and energy-efficient solutions
  • Full QA/QC, documentation, and third-party inspection support
  • Proven reliability for continuous, safe, and efficient concentration processes
  • Turnkey solutions including process design, thermal analysis, fabrication, and commissioning
  • Global experience across food & beverage, pharmaceutical, chemical, and wastewater treatment industries
Condensers Reboilers
Ready to Discuss Your Evaporators Requirements?

Contact our engineering team for custom solutions and quotations.

WhatsApp Email