Raj Process Equipments And Systems Pvt. Ltd.
An ISO 9001:2008 Company
 
Raj Process
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Forced Circulation Evaporators
Design Features:
Forced circulation evaporators are most suited for the liquids which tend to crystallize upon concentration and which have tendency to scale.
Evaporators in which circulation is maintained, regardless of evaporation rate or heat duty, by pumping the liquid through the heating element with relatively low evaporation per pass are suitable for a wide variety of applications.
The forced circulation system is the easiest to analyze and permits the functions of heat transfer, vapor-liquid separation, and crystallization to be separated. Forced circulation systems are generally more expensive than natural circulation systems and are therefore used only when necessary.
A choice of forced circulation can be made only after balancing the pumping energy cost, which is usually high, with the increase in heat transfer rates or decrease in maintenance costs. Tube velocity is limited only by pumping costs and by erosion at high velocities. Tube velocities are usually in the range of 5 to 15 feet per second.
Factors which must be considered when establishing the pumping rates include:
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Maximum fluid temperature permitted
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Vapor pressure of the fluid
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Equipment layout
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Tube geometry
** PLEASE DESCRIBE THIS IMAGE ** Velocity in the tubes
** PLEASE DESCRIBE THIS IMAGE ** Temperature difference between the pumped fluid and the utility fluid, and
** PLEASE DESCRIBE THIS IMAGE ** Characteristics of pumps available for the service.
Features of RAJ Forced Circulation Evaporators :
RAJ Forced circulation evaporator offer following advantages :
** PLEASE DESCRIBE THIS IMAGE ** High rate of heat transfer.
** PLEASE DESCRIBE THIS IMAGE ** Positive circulation.
** PLEASE DESCRIBE THIS IMAGE ** Relative freedom from salting, scaling, and fouling.
** PLEASE DESCRIBE THIS IMAGE ** Ease of cleaning and a wide range of application.
Features of RAJ Forced Circulation Evaporators :
** PLEASE DESCRIBE THIS IMAGE ** Chemicals
** PLEASE DESCRIBE THIS IMAGE ** Food processing
** PLEASE DESCRIBE THIS IMAGE ** Effluent treatments
** PLEASE DESCRIBE THIS IMAGE ** Dyes
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