Dalal Engineering Private Limited Ghodbunder Road, Thane, Maharashtra

The operation process in the WFE is simple but yet effective. Feed is introduced at the top of the unit and spread on the shell inner surface by the rotating distribution plate. Specially designed wipers wipe the feed thus creating and renewing the film. This thin film enables an efficient heat transfer even for highly viscous fluids. The low boiling component evaporates and passes through an entrainment separator. This minimizes the carry over of liquid droplets along with the vapors. The vapors are removed through the vapor line to an external condenser (optional) and condensed. For specific applications which demand low pressure drop, the central section of the evaporator is provided with a condenser, thus making the unit a short pathmolecular distillation unit. In this case, the vapors are allowed to condense on the outside of the tube bundle and flow out of the vaporator via the condensate outlet provided at the centre. The high boiling component flows along the shell wall and is discharged from the product outlet. Wiper action is important in promoting downward flow. The productconcentrate should be in fluid form at the operating temperature. Different designs of rotors are available depending upon the product, its viscosity and the process pressure.

Feature : Low rotational speed No bottom bearing Higher power to take care of feed fluctuations

Vibro Energy Seperators Vibro Energy Seperators are used for screening and grading of dry powders and screening of slurries. The machine is a proven performer for applications as diverse as abrasives, ceramic powders and slurries, chemicals, pharmaceuticals, powder coatings and slurries, minerals, metal powders, and food products. The machine is a rigid screening device that vibrates about its center of mass. Vibration is achieved by mounting eccentric weights on the top and bottom of a special heavy-duty motor with extended shafts on both its ends. Vibration can be varied by addition or removal of auxiliary weights and by changing the angle between the top and bottom eccentric weights. This allows control of amplitude as well as material flow patterns.

Feature : Low power, space and maintenance requirements High separation efficiency

Tub Vibro Finishing MachinesVibratory Tub Finishing Machines have rectangular working bowl with either straight or curved side walls based on the application. The system cascades mixture of media and components in the Tub, producing relative movement between the two. This results in efficient processing of components. Vibration can be adjusted with eccentric weights and systems can be batch type, continuous or customized as per needs.

The SUPERTOR is an all-round machine developed from a centrifugal pump with an inclined disc which is at an angle to the shaft instead of a normal impeller. This creates strong turbulent flows which simultaneously aid in pumping and intense mixing of the medium. Since the rotor and the housing are equipped with teeth, the SUPERTOR can also be used for disintegration or crushing.

Features : Mixing Fluids of various viscosities,Rapid homogenisation and slurry formation from wet cake

The drying in a rotary vacuum dryer is a batch operation under vacuum. It is possible to dry heat sensitive materials at well below boiling points of water and solvents. Drying time depends on material being dried, amount of solvent or water to be removed, desired final moisture content, permissible jacket temperature etc. The dryer is available in sizes ranging from 100 liters to 20,000 liters gross volume. The volume of wet material loaded into the dryer is usually restricted to 40-45% of gross volume.

A Falling Film Evaporator is used for concentration and evaporation of relatively low viscosity liquids. Steam, hot water or hot oil is used as the heating media and the process is carried out under atmospheric or vacuum condition. The Evaporator is used for volume reduction where dilute products are concentrated to a medium concentration. The process is continuous. The liquid to be concentrated is fed from the top and a distributor ensures proper feed distribution in each of the tubes. The distributor also ensures that all tubes are wetted and that the liquid flows in a film. The liquid and vapour both travel vertically downward. Due to a relatively thin film, the heat transfer coefficient is better than that obtained in reactors and simple shell and tube evaporators. If further concentration is required, the concentrated product can then be fed to the WFE.

Disc finishing machines are also high �G� force machines which work faster due to the centrifugal force generated by a rotating disc. Process times are significantly lower than Vibratory Finishing Machines but somewhat more than Centrifugal Finishing Machines. The advantages of Disc Finishing over Centrifugal Finishing are the greater ease of loading and unloading and the possibility of In-process inspection of parts. They are usually suitable for small components