ID
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
New adsorbent Last month, BASF SE (Ludwigshafen, Germany; www.basf.com) launched…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENGINEERING PRACTICEENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUS
ConvalFocus on Valves
These versatile, modular valves enable quick installation More than 2,500…
NEW PRODUCTS + Show More

Comment PDF Separation Processes

Bubble-Cap Tray Vapor Turndown

By Dan Summers |

The concept of tray stability can apply to bubble caps and be used as an alternative method to determine the minimum efficient capacity of these devices. A new stability correlation for bubble-cap trays is proposed and checked against FRI data The bubble-cap tray has been in the market place as a distillation device since the early 1800s [1]. It has been used extensively on distillation tray equipment worldwide as a highly efficient vapor/liquid-contacting device. Many people have examined the maximum capacity of bubble caps [2, 3], but very few have studied turndown. A U.S. Patent from 1987 [4] endeavored to enhance the turndown capability of bubble-cap trays to as high a turndown ratio value of 15:1. It is the intent of this article to establish a turndown criterion for bubble-cap trays such that the tray designer can maintain efficient operation at the lowest loads. A relationship is established, based on operational data, that shows what the minimum efficient vapor load can be on bubble-cap trays.   Bubble-cap tray and turndown The stability of sieve trays, movable-valve trays and fixed-valve trays was discussed in Ref. 5. The theory presented there is that there is a relationship between the upward force of the vapor…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
How can accurate pH measurement prevent power plant corrosion?
Five Reasons Why Chemical Companies Are Switching to Tunable Diode Laser Analyzer Technology
Simplify sensor handling and maintenance with ISM
Three reasons to measure pH in-line
ABB Ability™ technology to transform BASF rotating equipment into intelligent machinery and improve uptime and reliability

View More

Live chat by BoldChat