FALLING FILMEVAPORATION SYSTEMS

Vapour–liquid separator for falling-film evaporation

Keep product droplets out of the vapour path.

Vapour–liquid separator functional schematic
Functional illustration • not to scale • model to be specified

03 / SEPARATION

Liquid entrainment is a product loss and can contaminate recovered condensate or compressor service. The separator must accommodate the vapour load and liquid behaviour of the selected operating range, including changes in density and foaming tendency.

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Position in the system

InputOutputInstallation interfaces
Mixed vapour and concentrate leaving the heating sectionConcentrate to discharge and vapour to recovery or condensationCalandria outlet, concentrate pump, vapour duct and cleaning access

Specify the engineering conditions

Review itemRequired basis
Vapour loadUse vapour volume at actual pressure, not only water mass evaporated.
Carry-overAgree a condensate quality or product-loss acceptance method.
Foam behaviourReview foaming samples and level-control response.

Operation & maintenance

Provide accessible inspection and cleaning of internal surfaces. Investigate changes in condensate quality with level and throughput records instead of assuming clear-looking condensate is clean.

Selection limit

Separator diameter is not an independent throughput guarantee. Pressure, flow path and droplet behaviour determine the required separation duty.

Continue the equipment review

Next related module → · Effect and heat strategy · Acceptance criteria