Forced Circulation Evaporator by Shachi

Shachi Engineering has established itself as India's leading forced circulation and falling film evaporator manufacturer over the last two decades. Other products designed, built and installed by Shachi. We are focused on providing customized for maximum benefit to the customer. To date, we have manufactured a wide range of solutions including agitated thin film evaporator solutions, falling film evaporator, and agitated thin film dryer. A forced circulation evaporator demands knowledge and experience to design. Our evaporator design approach at Shachi begins with a detailed understanding of your requirements and the processes that can be used to meet them.

For the Forced Circulation Evaporator, a detailed study of your process variables helps us design the right amount of circulated feed to be introduced. With our experience in the process industry, we are able to suggest and deliver re-circulation at the highest efficiency. The Forced Circulation Evaporators are most suitable for crystalline feed or those containing solids.

Force Circulation Evaporator Working Principal

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 separation, 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 action 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 high 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