I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com)…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Pumps
Self-priming, liquid-ring pumps enable hygienic operation The CFS AS/ASH Series…
NEW PRODUCTS + Show More

Comment PDF Heat Transfer

Heat Transfer in Wiped Film Evaporators

By Daniel Bethge |

Simulations demonstrate the complex, changing properties of materials within the evaporator. Such information can help in both designing and selecting the proper evaporator A wiped film or agitated thin-film evaporator is very effective with difficult-to-handle materials. The evaporator consists essentially of a sealed cylinder that is provided with a heating jacket. The feed material is distributed on the inside as a thin film by means of a mechanical system. Due to the heating and the applied vacuum, the volatile components are evaporated and liquefied in an external condenser. In a short-path still, the condenser is fixed concentrically inside of the evaporator, so that a distillation at fine or even high vacuum is possible. A special version of the film evaporator is the horizontal dryer, where the material is conveyed with special conveyor elements through the evaporator. The non-evaporative components are pumped as a residue or discharged as powdery solids. The evaporation process is mainly heat transfer controlled. For a simulation, the evaporator is advantageously divided into several zones. Using a database that is stored in simulation programs, heat transfer coefficients and temperature differences for each section can…
Related Content
Maintaining heat-transfer-fluid quality
Effective and efficient process operation requires reliable temperature control. This imposes strict demands on the management of the heat-transfer-fluid (HTF)…
Maintaining Heat-Transfer-Fluid Quality
Learning what can degrade heat-transfer-fluid quality can help minimize potentially negative effects Organic heat transfer fluids (HTFs) are robust workhorses…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat