Because of the intimate contact between liquid and vapor, the system in the flash chamber is very close to an equilibrium stage. The system is called “flash” distillation because the vaporization is extremely rapid after the feed enters the drum. A demister or entrainment eliminator is often employed to prevent liquid droplets from being entrained in the vapor. The vapor is taken off overhead, while the liquid drains to the bottom of the drum, where it is withdrawn. Because of the large drop in pressure, part of the fluid vaporizes. The fluid is pressurized and heated and is then passed through a throttling valve or nozzle into the flash drum. The equipment needed for flash distillation is shown in Figure 2-1. Usually a large degree of separation is not achieved however, in some cases, such as the desalination of seawater, complete separation results. The more volatile component will be more concentrated in the vapor. In this process, part of a feed stream vaporizes in a flash chamber, and the vapor and liquid in equilibrium with each other are separated. One of the simplest separation processes commonly employed is flash distillation.
#Depriester chart water plus#
Aspen Plus Troubleshooting Guide for Separations
Chapter 17: Introduction to Adsorption, Chromatography, and Ion Exchange.Chapter 16: Introduction to Membrane Separation Processes.Chapter 14: Extraction of Partially Miscible Systems.Chapter 13: Immiscible Extraction, Washing, Leaching, and Supercritical Extraction.Chapter 11: Economics and Energy Conservation in Distillation.Chapter 10: Staged and Packed Column Design.Chapter 8: Introduction to Complex Distillation Methods.Chapter 7: Approximate Shortcut Methods for Multicomponent Distillation.Chapter 6: Exact Calculation Procedures for Multicomponent Distillation.Chapter 5: Introduction to Multicomponent Distillation.
Chapter 4: Column Distillation: Internal Stage-by-Stage Balances.Chapter 3: Introduction to Column Distillation.Chapter 1: Introduction to Separation Process Engineering.Wankat Separation Process Engineering, Second Edition Chapter 2: Flash Distillation by Phillip C.
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