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Wipe Blade Thin Film Rotary Evaporator

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The LCI agitated thin film evaporator also commonly referred to as a quotwiped film evaporatorquot consists of two major assemblies a cylindrical heated body and a rotorProduct is introduced above the heated zone and is evenly distributed over the evaporators inner surface by the rotor.

A multipleeffect evaporator as defined in chemical engineering is an apparatus for efficiently using the heat from steam to evaporate waterIn 1843 Norbert Rillieux invented and patented the multipleeffect evaporator where its first installation and use was in a Louisiana sugar factory.

A typical wiped film evaporator design is the cylindrical body design DVB „SAMBAYIn the wiped film evaporators type DVB rotors are equipped with hinged wiper blades that can be optimally adapted to the taskThe centrifugal force presses the wiper blades to the heating surface so that high evaporation ratios can be achieved at low flow ratesThe hinged wiper blade types of evaporators are particularly suitable for products with fouling tendency.

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Another important task of the rotor is to stabilize the liquid film on the heating surface at high evaporation ratesOn the one hand evaporation in the area of nucleate boiling is possible without ruptures of the filmOn the other hand the liquid film is pressed against the heating surface by the centrifugal forceThis avoids the adverse evaporation mode in which a vapour layer with insulating effect is formed under the liquid filmTherefore due to the functional principle extremely high specific evaporation rates are achievable in wiped film evaporators.

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Thin Film Evaporator How It Works LCI Corp.

For other applications such as the separation of monomers from prepolymers and polymers vertical thin film evaporators type DVF with spring wiper elements and DVS with SmithRotor are availableThe specially designed wiper elements out of PTFE or graphite are partially spring loaded and support the liquid in the film.

For the thermal separation of a mixture a thin film is produced at the heated wallA distribution ring on the rotor distributes the liquid evenly across the peripheryThen the blades fitted at the rotor spread the liquid as a thin film of min5 mm over the heat transfer surface.

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Hastelloy C22 clad shell with 316 SS rotor Buss SMS wiped thin film evaporator model LN 1400 Rated for FV25 psi at 482 degrees F internal Jacket rated for 218In which the product is vigorously agitated and continuously removed from the tube wall by scraper blades or wipers mounted on a shaft.

The Carbon Wiper Blade manufactured by us have a unique combination of physical and chemical properties which makes them most suitable for fast production WFE’sThe blades are available in different sizes and specifications and have good mechanical and sliding propertiesWiped filmed evaporators are designed to spread a thin layer or film.

The rotation flask rotates and shapes a thin film in negative pressure condition by heating it evaporates and then the vapor is condensed liquefied and recollected for separationA typical thin film evaporator has a water bath that can be heated in either a metal container or crystallization dish.

The Wiped Film Evaporator WFE is used for concentration distilling stripping dehydration and deodorisation of products which are heat sensitive or viscousThe equipment can handle a very wide range of feed compositions ranging from 1 to over 95 concentrationWFE has several advantages as stated in the table below.

This seies thin film evaporatorTFE equipped with the hinged blade which is suitable for the low viscosity easyfouling crystallized applicationWheel frames are installed at intervals on the shaft of the rotor and the scraper with hinges is installed on the outer edge of the wheel frames.

Usually a wiped film evaporator looks like a cylindrical bodyThe evaporator resembles the design of a DVB evaporatorThe rotors come with hinged wiper blades that optimally adapt to various tasksAs soon as the centrifugal force puts pressure on the wiper blades the heating surface becomes activeThis allows the film evaporator to achieve a multitude of low flow rates with high evaporation ratiosMoreover the hinged wiper blades are suitable for products that mostly produce foul and soiled liquids.

Wiped film evaporators are more reliable when it comes to the continuous processing of fouling soiled and viscous fluidsThey are available in a variety of vertical and horizontal orientations conical and cylindrical shapes and rotor designs for both counter and direct current vapor flowThat is why these evaporators are ideal for a wide range of separation tasksWiped film evaporators are much better compared to other evaporators.

Wiped film evaporators come with a vertical orientation and cylindrical heating jacketsYou should place the product that you need to process on the upper half of the apparatusThe processing also depends on the application of the volatile componentsThey will evaporate according to its application process and will go out either from the top half or bottom half of the evaporatorOnce the components evaporate you need to remove the entrained foam or droplets created by the vaporThis will prevent the vapor from entering the subsequent steps.

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