At the end of this module, you will be able to:
Multiple-effect evaporators combine two or more single-effect evaporators to obtain improved energy efficiency. The vapors produced from one effect become the heating medium in the following evaporator. In this module, you will learn the flow of steam and product in multiple effects, set up a heat and mass balance on a multiple-effect evaporator, and examine various types of evaporator designs to handle different product requirements. In the next video, you will learn about the flow of steam and product in a multiple-effect evaporator.
In the next video, you will learn how to conduct heat and mass balance of a multiple-effect evaporator. As you will observe, the mathematical analysis yields multiple equations that are solved simultaneously.
In the next series of short videos, you will observe the characteristics of different types of evaporator designs. Many of these designs address unique product requirements. In most cases, the objective is to create a sufficient rate of product flow on the heated surface to obtain a high heat transfer coefficient.
Batch type evaporator
Natural Circulation Evaporator
Forced Circulation Evaporator
Rising Film Evaporator
Falling Film Evaporator
Agitated Film Evaporator
In this module, you learned about product and steam flow through multiple effect evaporators. We conducted heat and mass balance to determine process conditions. You also learned different designs of evaporators to accommodate unique product requirements.