A falling film evaporator is a sort of heat exchanger that uses a tube and shell design to evaporate heart-sensitive liquids.
The feed is pumped into the evaporator to form the top. It is then uniformly dispersed throughout the heating tubes of the unit.
While partially evaporated the flows via tubes, forming a thin layer on the tube walls, to generate an extreme heat exchanger coefficient, the heat is given via a heating medium.
Under the influence of gravity, the liquid and vapour move downhill. The flow of vapour in a co-current way helps the liquid’s descent.
At the bottom of the falling film evaporator unit, the concentrated product and its vapour are separated from one another.
The design of falling film evaporators at CHINZ takes into account 2 vital factors:
1. To decrease the feed’s residence time, maximize heat transmission in the possible short period.
2. The homogenous distribution of heat makes sure that no clumps of fouling happen on the inner side of the walks during the feed transfer.
Efficient and high heat transmission is ensured by a standard method used during material choice that considers the feed qualities.
The distributor head that feeds into the tubes is intended to produce uniform wetting of the tube surfaces, preventing crusting that is the source of several major maintenance problems with falling film evaporators.
How does it work?
Two compartments are included in the tube and shell heat exchanger. Its basic feature is to put cooling or heating fluid, referred to as a media, into indirect but close contact with a product fluid, referred to as the procedure fluid.
Between the media and the procedure fluids, energy is exchanged has to heat via a tube and shell heat exchanger. When a shell and tube exchanger is used to evaporate a component of a procedure fluid, the media is warmer that the procedure fluids, and energy is transferred from the media into the process liquid.
The heating medium is cycled via the shell side of the shell and tube heat exchanger in the case of the falling film evaporators in particular. The evaporator’s tube side receives the process liquid. A part of the product is vaporized and energy is moved from the heating medium into the product.
The process liquid is poured into the top of the falling film evaporators and uniformly distributed throughout the heat exchanger’s heating tubes. The liquid must be dispersed to flow down the inside walls of every tube.
The term falling film refers to the liquid film that descends the tubes and is the source of the heat exchanger.
Why falling film evaporator?
A falling film evaporator is a type of heat exchanger that’s extremely effective and efficient. Indeed, due to the wonderful thermal performance of a well-made falling film evaporator, several firms across most key sectors have been gradually upgrading their equipment from outdated rising firm evaporators, forced circulation style evaporators, or calandria-type evaporators or 100LPH falling film evaporators.
The maintenance and development of a very thin film of instantly descending liquid laminated to the internal surface of the evaporation tubes let falling film evaporators attain their fine thermal performance.
The contact between the process liquid and the heating medium is maximized by the equally dispersed liquid layer, letting the fastest energy move from the media to the process fluid.
This entails quicker evaporation rates and the volume to employ a cooler heating medium, both of which are beneficial for treating thermally degraded materials!
To attain this top degree of performance, the descending liquid must be evenly dispersed throughout all of the tubes, equally disseminated around the circumference of every tube, laminated to the inside surface of every tube, and travel down every tube at the optimal velocity.
Tunes that have not been adequately wetted can cause thermally labile products to degrade, are the main source of fouling evaporator services, and have poor thermal performance.
Applications of falling film evaporator
· Food and Beverages
· Pharmaceuticals
· Papers
· Dairy Industry
· For products with low fouling property
· Chemical Industry
Wenzhou CHINZ Machinery Co.Ltd optimizes its flow lamination technology of every falling film evaporator it designs and builds. When designing the flow lamination system. We acknowledge that various applications might have a unique mix of variables, such as extract content, solids content, the desired reduction in the solvent, and vapour velocity, which must be taken into consideration.
The outcome is a small falling film evaporator with high throughout small fouling and highly consistent, regulated evaporation temperatures. Many interpretations of falling film evaporators are instantly gaining favor, particularly in the hemp business.
The dependability and performance of a falling film evaporator are extremely dependent on the designer’s technical skills. Wenzhou CHINZ Machinery takes pleasure in offering high-performance equipment and equipment services that have been meticulously produced, developed, and field-tested. Contact us now to buy a falling film evaporator or know more about our processing equipment and its services.
Post time: May-17-2023