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Review mechanical vapour recompression alongside circulation power, product boiling behaviour, electrical service and start-up heating requirements.
Mechanical vapour recompression raises the useful heating condition of process vapour so it can be reused. It does not replace the circulation pump or remove the need to select the heater and separator against the product. Request the vapour and liquid circuits together.
A meaningful comparison includes the recompressor, circulation pump, vacuum system and auxiliaries. Confirm the duty point and operating range rather than comparing a compressor power figure with another system's total utilities. Include start-up heating and condensate handling in the proposed scope.
State the operating pressure, boiling-point elevation and expected vapour composition. Entrainment control and the required temperature lift affect the proposed heating arrangement. Product trials and a verified balance should support any performance guarantee.
Keep the loop moving. The circulation pump sets the flow through the heater. That flow is distinct from the incoming feed and from the mass of water evaporated. Selection must follow the concentrated liquid throughout the planned operating range, including start-up and restart after cooling.
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Protect the recovered vapour. Droplets leaving with the vapour represent product loss and can contaminate downstream equipment. A separation device must work with the product’s foam and fouling behaviour. The choice of internals depends on the operating envelope and cleaning access.
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Recover heat within a defined duty. Effect count describes the evaporation arrangement, while TVR and MVR describe vapour recompression. They can be evaluated together. The circulation pump remains an additional electrical load regardless of the heat-recovery choice.
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Observe the limits; validate the clean. A useful control philosophy connects each process risk to a measurement and response. Loss of circulation, feed interruption or a changing vacuum needs a defined action. The cleaning boundary must include the pump and every product-contact part of the loop.
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