PRAB > Water & Wastewater Solutions > Vacuum Evaporation & Distillation
Compliance
The Vacuum Evaporator features a low CO2 footprint, with no air emissions, ever- adhering to ISO 9001.
Automation
The vacuum evaporator features a highly automated, remote control modem, 24/7 operation with minimal operator involvement and is low maintenance.
Value
As part of the plant assessment, PRAB reviews operating costs such as electrical, water, cleaners, haul-away, manpower and regulatory compliance to get you the most value for your equipment.
Recycle and Reuse
Produce high quality reusable distillate (ZLD) with the vacuum evaporator.

Solutions for Water & Wastewater Treatment

For over 30 years, Evaled evaporators and crystallizers have provided wastewater treatment solutions throughout the world. Evaled Heat Pumps, Crystallizers, and Mechanical Vapor Recompression (MVR) units offer clean technology for a wide range of industrial applications, including:

  • Exhausted Oily Emulsions – Degreasing Baths
  • Parts rinsing water – Phosphate coating baths
  • Reverse Osmosis concentrates – Mixed stream wastewater

Matching the application and material is critical to reduce corrosion and protect your investment. Evaled technology offers the highest quality products and material selection, with fit for purpose materials AISI 316 Stainless Steel, Super Duplex Stainless Steel and Nickel Alloy

EVALED® Vacuum Evaporators are an effective fluid waste management solution for concentrating and removing salts, heavy metals and a variety of hazardous components- reducing wastewater volumes and producing high quality, reusable distillate (ZLD). This industrial evaporation system is fully automated, and modular units are low in energy consumption with a low CO2 footprint. No air emissions, ever!

Benefits of all EVALED® Evaporators include:

  • High separation levels and constant distillate/condensate quality
    • Complete separation of heavy metals, boron, hardness ions, phosphates, surfactants, and solids
    • Large reduction in chemical oxygen demand
    • Good separation of oils
  • Wastewater volume reduction, used in zero liquid discharge projects together with ultrafiltration/reverse osmosis systems
  • Components recovery (proteins, metals, active ingredients)
  • Low energy consumption (low CO2 footprint)
  • Highly automated, remote control modem, 24/7 operation
  • Constructed of corrosion-resistant materials (AISI 316, Superduplex, Nickel Alloy, Teflon SiC),
  • Quality Management (ISO 9001:2008). All evaporators must pass Factory Acceptance Test (FAT) prior to shipping
Zero-Liquid Discharge, ZLD | Prab.com

 

To see if the EVALED Vacuum Evaporator is right for your application please contact us today. Or, if you know your options and would like a quote from a product specialist click here.

To discuss your custom application
If you know your options and would like a quote from a product specialist

EVALED® heat pumps, hot/cold water evaporators, and Mechanical Vapor Recompression (MVR) units offer clean separation technology for a wide range of industrial wastewater treatment applications including:

  • Exhausted oil emulsions
  • Tumbling baths
  • Parts rinsing waters
  • Ion exchange regeneration
  • Reverse osmosis concentrates
  • Cooling tower blow-down
  • Pretreatment baths
  • Degreasing baths
  • Phosphate coating baths
  • Pickling baths (H2SO4, HCI, HF, HNO3)
  • Rinsing baths (cyanide, copper, zinc, nickel, cobalt, cadmium, chromium)
  • Mixed stream wastewater
EVALED™ Vacuum Evaporators | Prab.com

 

To see if the EVALED Vacuum Evaporator is right for your application please contact us today. Or, if you know your options and would like a quote from a product specialist click here.

Co-Generation w/ Hot or Cold Water Evaporators

Hot/cold water evaporators enable the use of low or no cost energy sources – excess hot water or steam that is already available from cogeneration or cooling plants. Using existing waste heat to power the evaporation process reduces operational costs to only the power needed to run the recirculating pumps and/or scraper.

Hot/Cold Water Evaporators feature:

  • Vacuum evaporation conditions: 4 – 30 kPa (0.6 – 4.4 PSIA)
  • Lower Boiling Temperatures: 30 – 70 °C (86 – 158°F)
  • Low electrical energy consumption (cooling and heating circulating pumps): 12-30 kWh/ton of distillate (0.045-0.11 kWh/gal)
  • Efficient consumption of energy from hot water/steam: 300/600 kWh/ton of distillate (1.1/2.3 kWh/gal)
  • Utilization of waste heat energy from cogeneration plants or process streams, reducing operational costs
  • Single and multiple effect units available

The evaporators are available in two series using different heat transfer technologies:

Hot/Cold Water evaporator with forced circulation and external shell & tube heat exchangers

  • Designed to take advantage of available waste heat
  • Capacities range from 20,000 – 60,000L (5,300 – 15,800 gal) of distillate production per day
  • Forced circulation reduces rates of scaling and fouling

The AC F series evaporator is a hot/cold water evaporator with forced circulation and external shell & tube heat exchangers. The heat necessary to boil the wastewater is delivered by customer supplied hot water; the cooling necessary to condense the vapor is delivered by customer supplied cold water.

Evaled Vacuum Evaporators EW Series Diagram | Prab.com

 

Hot/Cold Water evaporator with external shell & tube heat exchanger and scraped heating surfaces

  • Designed to take advantage of available waste heat
  • Capacities range from 3,000 – 12,000L (790 – 3,200 gal) of distillate production per day
  • Scraped surfaces allow treatment of precipitating waste streams or crystallization of concentrate to achieve Zero Liquid Discharge (ZLD) goals

The AC R series evaporator is a hot/cold water evaporator/crystallizer with a scraped boiling chamber and a hot water heating jacket. This series is designed to treat wastewater containing a high concentration of suspended and/or dissolved solids. An Archimedes-screw type scraper prevents any fouling of the heat exchange surfaces. An RW unit often follows a primary evaporator in series to provide further concentration or crystallization of the concentrate.

With the addition of an optional intermediate heat exchanger, RW evaporators can also utilize excess steam as a heat source. Optional heat pump conversion kit enables operation when excess hot water or steam is not available.

 


 

Heat Pump Evaporator

The heat pump evaporator is the core of the Evaled line and offers flexibility, low electrical energy consumption, and superior reliability. Evaporation occurs under high vacuum conditions, consuming 25x less energy and providing better control of foaming than units operating closer to atmospheric pressure. The reduced carry-over of contaminants produces a high quality distillate stream for low to medium flow wastewater treatment applications.

Heat Pump Evaporators feature:

  • Vacuum Evaporation Conditions: 7- 9 kPa (1.0 – 1.3 PSIA)
  • Lowest Boiling Temperatures: 30 – 40 °C (86 – 104°F)
  • Low Electrical Energy Consumption: 150 kWh/ton of distillate (0.57 kWh/gal of distillate)
  • Ozone Friendly refrigeration gas (R 134)
  • Designed for low to medium flow wastewater streams
  • Low Scaling and corrosion potential
  • Highest quality distillate

Heat pump evaporators are available in two series using different heat transfer technologies:

PRAB's R-Series | Prab.com

 

Heat pump evaporator with forced circulation and external shell & tube heat exchanger.

  • Electrical energy consumption: 150 kWh/ton of distillate (0.57 kWh/gal of distillate)
  • Capacities range from 700 – 48,000L (185 – 12,680 gal) of distillate production per day
  • Designed to treat low to medium wastewater flow rates and produce maximum distillate quality
  • Forced circulation and low boiling temperatures reduce rates of scaling, corrosion, and fouling

PC F series heat pump evaporators are designed to produce maximum distillate quality with minimal capital and operating costs. PC F series evaporators operate under high vacuum conditions (1.0 – 1.3 PSIA), reducing the boiling temperature of the wastewater to 86 – 104°F. This reduced operating temperature significantly inhibits the rates of scaling and corrosion based chemical reactions and decreases the maintenance required as a result. Each unit is skid-mounted for simple installation and controlled by PLC, allowing continuous 24/7 operation.

PRAB's E-Series Diagram | Prab.com

 

Heat pump evaporator with scraped heating surfaces

  • Designed for low flow, highly contaminated or pre-concentrated waste streams
  • Capacities range from 150 – 2,000L (40 – 528 gal) of distillate production per day
  • Low boiling temperatures reduce rates of scaling and corrosion
  • Scraped surfaces allow treatment of precipitating waste streams or crystallization of concentrate to achieve Zero Liquid Discharge (ZLD) goals

The PC R series evaporator is a heat pump evaporator/crystallizer with a scraped boiling chamber and a heating jacket. This series is designed to treat wastewater containing a high concentration of suspended and/or dissolved solids. The continuously stirred scraper prevents any fouling of the heat exchange surfaces. An R unit often follows a primary evaporator in series to provide further concentration or crystallization of the concentrate.

PRAB's R Series Diagram | Prab.com

 


 

Mechanical Vapor Recompression Evaporators

As a result of low operational costs due to minimal electrical energy consumption, mechanical vapor recompression (MVR) technology evaporators allow the treatment of high flow rates of wastewater with a return on investment that can often be measured in months. The MVR units contain no refrigeration circuit; they utilize the heat of compression added by a rotary lobe type compressor to superheat the wastewater vapor, then transfer that heat through an exchanger to boil the incoming wastewater.

  • Vacuum Evaporation Conditions: 60-70 kPa (8.7 – 10.2 PSI)
  • Low Boiling Temperatures: 80 – 90 °C (176 – 194 °F)
  • Low Electrical Energy Consumption (compressor, recirculating pumps): 30-50 kWh/ton of distillate (0.11 – 0.19 kWh/gal)
  • Designed to treat large wastewater flow rates with low energy consumption

The MVR units are available in three series, using two different heat transfer technologies:

TC series and the new generation RV F Series: Mechanical vapor recompression evaporators with forced circulation and external shell & tube heat exchanger

  • Electrical energy consumption: 30 – 50 kWh/ton of distillate (0.11 – 0.19 kWh/gal)
  • Capacities range from 10,000 – 120,000L (2,600 – 31,700 gal) of distillate production per day
  • Designed for high flow rates with minimum electrical energy consumption

The TC series evaporator is based on the mechanical vapor recompression technology, and uses forced circulation through an external shell & tube heat exchanger to evaporate the wastewater in the boiler. The forced circulation of the wastewater reduces scaling, deposits, and fouling on the heat exchange surfaces.

The RV F series evaporator is an evolution of the TC series and improves upon the existing technology to increase distillate quality, reduce energy consumption, reduce footprint, and add updated controls and automated cleaning.

Mechanical Vapor Recompression evaporators with forced circulation and falling film heat exchanger

The R V series evaporator is based on the mechanical vapor recompression technology, but uses a forced circulation, falling film heat transfer device to evaporate the wastewater in the boiler.

Due to the low temperature differences between the heat exchanger and boiling wastewater, the falling film technology allows for the successful treatment of wastewaters containing highly corrosive (acidic or alkaline) contaminants or heat-sensitive products to be recycled.

  • Electrical energy consumption: 30 kWh/ton of distillate (0.11 kWh/gal)
  • Capacities range from 100,000 – 200,000L (26,400 – 52,800 gal) of distillate production per day
  • Designed for high flow rates and treatment of wastewater with heat sensitive contaminants

Matching the application and material is critical to reduce corrosion and protect your investment. EVALED® filtration technology offers the highest quality products and materials selection, with fit-for-purpose components:

  • AA (AISI 316 L)
  • FF (Super Duplex)
  • HH (Nickel Alloy)
  • KT (Teflon® SiC)

 

To see if the EVALED Vacuum Evaporator is right for your application please contact us today. Or, if you know your options and would like a quote from a product specialist click here.

Full Spectrum Industrial Wastewater Recycling and Reuse. Cost Reduction, Waste Minimization & Environmental Compliance.

Agenda

  • Motivations for Reuse
  • Regulatory Overview
  • Wastewater Minimization Techniques
  • Wastewater Treatment Technology Evaluation
  • Intro to Membrane Filtration Technology
  • Intro to Vacuum Evaporation Technology
  • Case Studies

 

To see if the EVALED Vacuum Evaporator is right for your application please contact us today. Or, if you know your options and would like a quote from a product specialist click here.

Product Brochures
Product Brochure: EVALED Vacuum Evaporation
Product Brochure: EVALED Evaporation Technology

Application Review
Application Review: Automotive Components Manufacturer Reduces Wastewater Volumes from Die Casting Process
Application Review: Automotive Manufacturer Drives Cost Reduction and Increases Profitability Through Wastewater Treatment
Application Review: Chrome Plating Process Achieves Cost Reduction Through Zero Liquid Discharge
Application Review: Parts-Cleaning Oily Wastewater Disposal Costs Reduced by Over 90% with Vacuum Distillation

Technical Brief
Technical Brief: Evaporation Technology

White Paper
White Paper: Green Engineering
White Paper: Making Wastewater Compliance Part of A Profit Strategy
White Paper: PRAB Evaporation Technology
White Paper: Prioritizing Plant Housekeeping In A Metalworking Operation
White Paper: Six Feasibility Studies
White Paper: Taking Control of Wastewater Treatment

Other Downloadable Content
PRAB Fluid Filtration Solutions Product Selection Chart Brochure
PRAB Fluid Filtration Systems and Wastewater Treatment Brochure
PRAB Filtration Spectrum Brochure
PRAB Industrial Water & Wastewater Treatment Systems Brochure
PRAB Industral Water & Wastewater Treatment Technologies Brochure
PRAB Builds Equipment for the Toughest Jobs in Manufacturing and Metalworking

 

To see if the EVALED Vacuum Evaporator is right for your application please contact us today. Or, if you know your options and would like a quote from a product specialist click here.

The PRAB Guardian™ Coolant Recycling System removes tramp oils and suspended solids from contaminated coolant, controls bacteria and can adjust fluid concentration for fluid recovery. Typical ROI is 6-9 months. Enter your details below to calculate system payback for your application:


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