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Distillation units
System description

ELETTRACQUA multiple effects distillation units consist of different evaporation sections each provided of liquid disengaging sections and a final condensing units.

In order to increase the energy savings, an additional DTS sanitary heat exchanger is installed to recover heat from the steam condensate to the first effect, transferring sensible heat to the feed water.

The column of each effect operates in series, only the first one is heated by plant steam.

The steam produced from each effect is used to feed the downstream effect in sequence of steps.

Steam separation method

The steam separation system is the heart of the system being installed inside the evaporation column directly in contact with the pure steam produced by the separation of the water droplets from the pure steam.

ELETTRACQUA new pure steam generators and distillation units are all equipped of cyclone steam separation systems instead of the demister traditionally used for this purpose.

Two basic principles are involved in the steam separation by Cyclon System:

High Steam Speed creating centrifugal forces that separate any entrained water particles and throw them to the outer wall of separator to drain.

Double 180 turns: the pure steam flow direction is forced to double 180° turns inducing gravity separation of larger water droplets

The pharmaceutical customers pay lots attention to the materials and surface finishing, the cyclone system, that is the heart of the system is the only device designed to meet all the material and finishing  requirements, including ferrite tests.  The cyclone separation system for its nature is a fully hygienic device.

Pretreatment requirements

Feeding water to WFI units is PW.

Key Features and benefits

High Efficiency:
Maximum efficiency is obtained from the design and from the high system automation, inlet DTS heat exchanger is designed to obtain the maximum energy savings recovering the industrial steam condensate from the first effect.

High Automation for high operating results, reliability and operative cost savings:
Comparing to the other system on the markets, Higher automation and controls are used to reach higher system efficiency and reliability.  The main utilities, industrial steam and Purified Water (PW) are continuously controlled and regulated to obtain the maximum results from each effects, transient in the industrial steams are managed automatically by the system.




ISPE Baseline Guide



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