If you are sizing an evaporator for a concentrated industrial stream, the short answer is this: MVR (mechanical vapor compression) usually wins on energy and operating cost, while a multi-effect evaporator usually wins on CAPEX and on tolerance for difficult, scaling, or fouling feeds. In most projects I work on, the decision comes down to three things \u2014 how much electricity you can buy, how much steam you already have, and how nasty the wastewater is. Get those three right and the selection is usually obvious. Get them wrong and you will either overspend on equipment or overspend on utilities for the next fifteen years.<\/p>\n
I have commissioned both types on landfill leachate, plating rinse water, pharmaceutical mother liquor, and battery-material brine. The physics never changes. What changes is the site.<\/p>\n