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China Suppliers Factory for Efficient Falling Film Evaporation Plant for Concentrating Heat-Sensitive Liquids
Description
The liquid feed is introduced at the top of the calandria, where a distribution system ensures the formation of a uniform liquid film along the inner walls of the heating tubes. As the film flows downward under gravity, it is heated externally and begins to boil, partially evaporating along its path. The downward flow is further promoted by the co-current flow of vapor generated during boiling.
Separation of the remaining liquid film and vapor takes place in the lower section of the calandria and is completed in a downstream centrifugal droplet separator. To prevent dry spots—which can cause fouling and deposit accumulation—it is critical to maintain complete and even wetting of the entire heating surface. This can be achieved by using longer heating tubes, dividing the evaporator into multiple compartments, or implementing product recirculation.
Separation of the remaining liquid film and vapor takes place in the lower section of the calandria and is completed in a downstream centrifugal droplet separator. To prevent dry spots—which can cause fouling and deposit accumulation—it is critical to maintain complete and even wetting of the entire heating surface. This can be achieved by using longer heating tubes, dividing the evaporator into multiple compartments, or implementing product recirculation.
Particular Feature
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Best product quality, gentle evaporation, mostly under vacuum, and extremely short residence times in the evaporator.
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Simple process control and automation.
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Flexible operation, quick start-up and easy switchover from operation to cleaning, uncomplicated changes of product.
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High efficiency heat transfer, it is possible to design multiple-effect, thermal vapour recompression, mechanical vapour recompression.
Fields of Application
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Particularly suited for temperature-sensitive products, such as dairy product, fruit juices, plant extracts, sugar, blood plasma.
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For liquids which contain small quantities of solids and have a low to moderate tendency to form incrustations.
Advantages of Zongheng
Advanced Energy-Efficient Technologies
Integration of multi-effect evaporation and mechanical vapor recompression (MVR) systems significantly reduces energy consumption and operational costs.
High-Quality and Durable Construction
Utilization of high-grade stainless steel and industrial alloys ensures corrosion resistance, durability, and long-term reliability under continuous operation.
Comprehensive Customization
Tailored system design, layout, and material selection to meet specific client requirements, supported by end-to-end services from simulation to commissioning.
Precision Automation
Equipped with advanced PLC and HMI systems for real-time monitoring, precise process adjustments, remote control, and predictive maintenance.
Global Compliance
Rigorous testing and inspection processes aligned with international standards (ISO, CE, ASME), ensuring safety and performance.
Frequently Asked Questions
How does a falling film evaporator work?
The liquid feed forms a thin film on the inner walls of heating tubes and flows downward by gravity. Heat applied externally causes the liquid to boil and evaporate partially as it moves down.
Why is it suitable for temperature-sensitive products?
It offers gentle evaporation, often under vacuum conditions, with extremely short residence times, preventing thermal degradation of products like juices or dairy.
How do you prevent fouling and dry spots?
By ensuring complete and even wetting of the heating surface through optimized distribution systems, longer tubes, or product recirculation.
What energy-saving options are available?
Zongheng systems can integrate multiple-effect designs, Thermal Vapour Recompression (TVR), or Mechanical Vapour Recompression (MVR) to maximize efficiency.
What industries benefit from this technology?
It is widely used in dairy, fruit juice processing, plant extract production, sugar refining, and blood plasma processing.
Is the system automated?
Yes, Zongheng systems are equipped with advanced PLC and HMI interfaces for real-time monitoring, precise control, and remote operation capabilities.