Heat Pump Vacuum Evaporator

The low-temperature heat pump vacuum evaporator manufactured by GRELLIX operates at the temperature of around 35°C .It can evaporate and concentrate waste liquids, reducing the wastewater volume by more than 90%, with a COD removal rate as high as 99%. Wastewater is transformed into two streams, one containing solid waste with reusable resources (mainly raw materials and by-products) and another one with high quality water, which can be reused.The equipment operates fully automatically, with low energy consumption and durable performance.

This system helps enterprises save a significant amount on hazardous waste disposal costs, effectively achieving resource recovery, energy conservation, and emissions reduction, making it a powerful tool for Zero Liquid Discharge (ZLD).We can deliver a zero liquid discharge system that will allow your company to achieve the following goals:

• Reuse 95% of the water
• Recover valuable raw materials and by-products dissolved in the water
• Minimize the final sludge to be managed

Demonstration of Treatment Efficiency by Heat Pump Vacuum Evaporator

R&D Background of Heat Pump Vacuum Evaporator：

• Concentrate and reduce the volume of waste liquids, lowering hazardous waste disposal costs for businesses!
• Evaporate and concentrate the solution , recovering valuable raw materials or by-products.
• Help manufacturing enterprises to achieve zero liquid discharge!

Applications of Heat Pump Vacuum Evaporator

• Oily emulsions, coolant fluids, mould release agents
• Working and wash baths in galvanic processes and surface treatments
• Purging of compressors, water from washing floors
• Water from washing tanks and reactors (in the chemical, pharmaceutical, cosmetic and perfumery industries)
• Penetrating liquids
• Graphic arts waste (e.g. cleaning water and paint)
• Water treatment plant reject (e.g. reverse osmosis and demineralizers)
• Leachate from municipal solid waste dumps
• Digestate from biogas generation plants
• Food and beverage industry
• Pickling industry
• Energy generation
• Paper, minerals and extraction industries

Working Principle of Vacuum Heat Pump Evaporator

The boiling point of water decreases as the pressure decreases. Under vacuum conditions, the boiling point of water can drop to below 25°C. The low-temperature heat pump evaporator uses a vacuum pump to create a vacuum in the boiling chamber (ensuring the vacuum pressure is below -90 KPA), enabling the wastewater to boil and evaporate at around 35°C in a closed system.

The compressor compresses the refrigerant, which then heats the liquid in the boiling chamber through a coil in the boiling chamber, causing the wastewater to evaporate at approximately 35°C. After passing through the expansion valve, the refrigerant cools down and cools the water vapor generated in the boiling tank via a coil in the condenser. The resulting condensate is discharged through pipes into the distillate tank. When the water level in the distillate tank reaches the high level, the centrifugal pump discharges the distilled water, achieving separation of the distilled water and concentrated liquid.

After completing several evaporation cycles, the compressor stops working, and the concentration pump is turned on to draw the concentrated liquid into the buffer tank, where it proceeds to the next step in the process.

Technical Data

Advantages of GRELLIX Vacuum Evaporators

• Significant reduction in waste management costs：This system can concentrate and reduce the volume of wastewater by over 90%,significantly reducing the waste management costs.
• Promoting the reuse of a significant part of wastewater: The distillate is clear and transparent ,meeting discharge standards or can be reused.
• Low energy consumption: The equipment operates with only electricity, with approximately 130 kWh of electricity required to treat 1 ton of wastewater.
• Highly automated: The equipment uses Siemens PLC control modules and the “GRELLIX Cloud” app, with over 70 data points monitored in real-time online. It can be operated by one person and requires no supervision.
• Durable and long-lasting: The core components of the equipment are from top international brands, ensuring durable and reliable operation with a service life of over 10 years.
• No safety hazards：Operating under vacuum and negative pressure, the liquid boils at around 35°C. The low evaporation temperature ensures stable operation of the equipment with no safety hazards.
• Good corrosion resistance: In addition to using corrosion-resistant materials for the evaporator tank, special anti-corrosion treatments are applied, further enhancing its resistance to corrosion.
• Occupy little space: The low-temperature heat pump evaporator integrates vacuum, evaporation, and cooling in a compact design. For example, a 3-ton low-temperature evaporator occupies only 6 square meters.
• Wide applicability：Within the equipment’s operating range, it can treat various types of industrial wastewater, such as cutting fluid wastewater, chemical nickel wastewater, high-salinity wastewater, etc.
• Customized solutions: The equipment can be customized based on the clients’ wastewater quality and quantity, with tailored wastewater treatment solutions provided.

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With 20 years of proven expertise in industrial wastewater treatment engineering, we can customize vacuum evaporators/crystallizers for our clients, and provide comprehensive solutions for wastewater treatment, liquid waste minimization and zero liquid discharge system for all industrial activities.
If you have any related needs, please contact us immediately. We can provide you with a free technical solution.
Phone: +86 13165068628
E-mail: grellix2005@gmail.com
WeChat: 13165068628