Advantages of Wiped Film Evaporator (WFE)

 

The Wiped Film Evaporator (WFE) is used to concentrate, distill, strip, dehydrate, and deodorize heat-sensitive or viscous goods. The apparatus is capable of handling a wide range of feed compositions ranging from 1% to over 95% concentration. WFE provides various benefits, which are listed in the table below. The action is continuous with a single pass; the thin film is produced and renewed by self-cleaning continuous contact wipers. This type of process increases product production while avoiding residue and colour buildup. It has an inbuilt condenser (optional) that reduces pressure loss while maintaining a vacuum.

Advantages of Wiped Film Evaporator (WFE):

●    Slotted Wiper Blades:

For improved heat transfer, unique wiper blade designs effectively spread the material in a thin film on the wall. To reduce residence time, blades move the product down the heated wall in a matter of seconds.

●    Low Rotor Speed:

While working with Ablaze Glasswork's Wiped Film Evaporators, high rotor speeds are not required.

 

The WFE design's high heat transfer coefficient necessitates lower rotor speeds, which considerably extend the service life of the wiper blades, mechanical seal, and drive bearing.

●    No Bottom Steady Bearing:

Unlike a standard fixed clearance evaporator, the WFE rotor is totally supported by the top drive and bearing assembly, which is affixed to the WFE top cover and main shell flange. This is accomplished through the use of the robust overhung WFE design. Because there is no bottom steady bearing, no flux oil is required, which is crucial when the product is non-volatile.

●    Low Horsepower Requirements:

The low rotor speed cuts horsepower requirements greatly. This results in significant cost savings, especially when compared to a fixed clearance evaporator of the same size.

●    Expandable WFE Sizes:

Additional thermal sections can be placed above the original thermal section at your plant site for select models to give expanded capacity for existing WFEs. Rotor Removal Made Simple In 30 minutes or less, any size WFE rotor may be removed and reinstalled. Simply detach the motor leads, feed line, and bolts, then remove the rotor out of the shell as a single unit. This enables quick and easy inspection, maintenance, and cleaning.

●    Internal Condenser:

The absence of a bottom stable bearing in the WFE design allows for the installation of an internal condenser. When compared to external condensers, WFEs with internal condensers have less pressure loss, allowing for high-vacuum operation. The high vacuum, combined with the proximity of the condenser surface area to the heated wall, results in superior separations, complete condensation, and sub-cooling.

●    Efficient Entrainment Separators:

Full-length entrainment separators built specifically for normal and high-vacuum operation effectively remove entrained droplets from the vapour stream and increase the purity of the distillate product.

●    High-Vacuum Operation:

The WFE is a high-vacuum design that can function with vacuums as low as one micron (.001 torr). Deep vacuum operation reduces operating temperatures and prevents thermal deterioration.

 

Ablaze Glasswork is a noted manufacturer and supplier of Thin Film Evaporator in Gujarat, India.

●    Bottoms Outlet:

For viscous materials with high melting temperatures, the WFE bottom head can be heated, and extruder blades can be used to help discharge heavy material mechanically.

●    Low Maintenance:

Any WFE manufacturing company would normally suggest only one downtime per year for 1-2 days for inspection and maintenance, depending on the application. Mechanical seals are designed to last for many years. Because there is no bottom bearing, there is no need for costly maintenance.

●    Unique Drive Assembly:

Our unique WFE drive assembly allows our customers to readily access the mechanical seal for replacement without removing the entire rotor assembly, reducing downtime and unnecessary expenses associated with overhead cranes.

 

Contact Ablaze Glassworks Pvt. Ltd. for all your industrial equipment products such as Wiped Film Evaporator, High-pressure relief valve, Falling film absorber, Sight flow indicators, Thin Film Evaporator, Lined Valves, etc.