Home / Systems
Compare staged evaporation with vapour reuse, product-specific circulation duties and coordinated pressure, feed and concentrate controls.
In a multi-effect train, vapour from one effect can supply heat to another operating at a lower pressure. Each effect still needs a defined material balance and heating duty. Compare utility demand at the same total water removal, concentration and operating conditions.
The product changes as water is removed. Confirm where viscosity, solids formation or deposits become limiting, and whether forced circulation is required in every effect or only in the finishing stage. Arrange interstage transfer and concentrate control around the actual product path.
A staged system requires coordinated start-up, vacuum, condensate handling and level control. Request the effect-by-effect pressure and temperature schedule, the transfer arrangement, and the response to interrupted feed or heating service.
Add heat under pressure. In the common non-boiling heater arrangement, pressure in the circuit limits boiling within the heater. Heat is added before the liquid enters the flash zone. Tube or plate geometry is selected from product behaviour and pressure-drop constraints, rather than the circulation label alone.
Review structure & specification →
Release vapour and retain liquid. The pressure change at the separator enables part of the heated liquid to flash. The vessel provides space for vapour disengagement while maintaining liquid inventory for recirculation. Its level and geometry therefore affect both separation and pump suction.
Review structure & specification →
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.
Review structure & specification →
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.
Review structure & specification →