Forced Circulation Evaporator by Shachi

Over the last 50 years of its existence, Shachi Engineering has emerged as leading circulating as well as falling film evaporator manufacturer in India. Other products designed, built and installed by Shachi include We are focused on providing customized for maximum benefit to the customer. To date, we have manufactured a wide range of solutions including thin film distillation solutions, film evaporator, and agitated thin film dryer among others. Designing a forced circulation evaporator requires skill and experience. At Shachi our design process for the evaporator starts with building a thorough understanding of your requirements and processes by which they can be met.

A detailed study of your process variables helps us design the right amount circulated feed to be introduced, and our experience in the process industry helps us to deliver re-circulation at the highest efficiency. The equipment is most suitable for crystalline feed or those containing solids. Our experience endows us with strong process expertise and enables us to deliver products of world class quality. Along with an experienced team, we also bring to the table tried and tested designs for forced circulation evaporators as well as falling film evaporator, rising film evaporator or thin film evaporator, among other solutions for industrial drying and cooling operations. .

Evaporator process variables

Forced circulation evaporators are tubular heat exchangers for concentrating a feed. Three factors are to be considered when designing a forced circulation evaporator: liquid-steam seperation, exchange of heat, and energy-efficiency.
Liquid to be concentrated is circulated through the tube at high pressure using a pump.This elevates the boiling point of the fluid, and boiling does not occur. Forced circulation also creates a degree of agitation. When the liquid passes through the tubes into vapor head, pressure suddenly drops, leading to the flashing of super-heated liquor. This is what brings about the evaporation effect.

An external mechanical agent is used to pump certain portion of concentrate back into the feed where it enters the evaporator. High concentrate to feed ratio is achieved as re-circulation increases the heat transfer coefficient of the feed. Also, the hig velocities generated with the mechanical force ensure high heat transfer due to turbulence. The high velocities and low residence time achieved in a small space (due to high heat transfer) help to eliminate probability of feed reacting with the vessel and causing scaling. Rapid evaporation makes forced circulation evaporators suitable for processing thermonuclear substances. . The use of pumping mechanism also makes these machines the best fit for viscous preparation.

In most evaporation operations, heat is supplied by condensation of vapor and water is the solvent. The design of energetic valve of the evaporator determines whether steam used in evaporation could be recovered and reused or not. Substances such as concentrated insulin and liver extracts are obtained using forced circulation evaporation. This method is also used for crystalline operations as it involves crystals being suspended at all times.

Forced circulation evaporator for Process Industry


  • Effluent Treatment
  • Chemicals

Benefits to the customer

Increased heat transfer

with advanced analysis

Rapid liquid movement

manufacture and commission dryer for any capacity

Strong process expertise

with world class quality

Experienced team of service engineers

to provide you continuous

No salting, scaling and fouling

with lesser cleaning and maintenance