Falling Film Evaporation Plant

A falling film evaporator efficiently concentrates heat-sensitive liquids. The feed liquid forms a thin film flowing down heated vertical tubes, where it partially evaporates. Vapor generated flows parallel to the liquid, enhancing the process. It ensures a short residence time and low operating temperature, preserving product quality. The system requires proper liquid distribution and complete surface wetting to prevent fouling and maintain high thermal efficiency and operational stability.

product details

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.

Falling Film Evaporation Plant Detail (1)

Falling Film Evaporation Plant Detail (2)

Falling Film Evaporation Plant Detail (3)

Particular Feature

● Best product quality, gentle evaporation, mostly under vacuum, and extremely short residence times in the evaporator.
● Simple process control and automation.
● Flexible operation, quick start-up and easy switchover from operation to cleaning, uncomplicated changes of product.
● High efficiency heat transfer, it is possible to design multiple-effect, thermal vapour recompression, mechanical vapour recompression.

Fields of Application

● Particularly suited for temperature-sensitive products, such as dairy product, fruit juices, plant extracts, sugar, blood plasma.
● 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 and Turnkey Solutions

Tailored system design, layout, and material selection to meet specific client requirements, supported by end-to-end services from simulation to commissioning and training.

Precision Automation and User-Friendly Control

Equipped with advanced PLC and HMI systems for real-time monitoring, precise process adjustments, remote control capabilities, and predictive maintenance.

Stringent Quality Assurance and Global Compliance

Rigorous testing and inspection processes aligned with international standards (ISO, CE, ASME), ensuring safety, performance, and worldwide regulatory compliance.