Chemical Engineering Practice

Useful Tips for Optimal Fired Heater Performance

Apr 2, 2012
Nikki Bishop
Advanced Process Control Strategies for Process Fired Heaters Fired Heaters are used extensively throughout refineries for heating, vaporization and thermal cracking of various process fluids. These heaters are essential for refinery operation. The main objectives for fired heater optimization are...

Installing a Charge Gas Compressor Booster

Apr 2, 2012
Giorgio Franceschetti
The Braskem Ethylene Southeast Plant expansion study from 500 MTA to 700 MTA recommended that the charge gas compressor turbine and the 1 st and 2 nd stages should be replaced. Due to a series of technical and logistical constraints, was decided to install a booster compressor upstream the first...

Flare System Inspection

Apr 2, 2012
Jimmy Cleavinger
When evaluating the safety and environmental aspects in olefins facility one must surely consider the flare. The flare is responsible for combusting enormous amounts of flammable material during plant upsets. Not only is the flare responsible for combusting these materials but it also must perform...

Applying Offline Tools to Reduce On-Site Control Implementation Effort

Apr 2, 2012
Kenneth V. Allsford
Process control engineers are continuously challenged to reduce the effort to commission new advanced regulatory control strategies and/or linear/nonlinear multivariable control applications. Reducing on-site controller identification and tuning and the associated "interference" with process...

Industrial Experience in Handling Cleaning of Crude Refinery Preheat Trains

Apr 2, 2012
Simon J. Pugh
Industrial Experience in Handling Cleaning of Crude Refinery Preheat Trains 1,2 Ishiyama E.M., 1 Pugh S.J. and 2 Wilson D.I. 1 IHS ESDU, Houndsditch, London EC3A 7BX, UK 2 Department of Chemical Engineering and Biotechnology, University of Cambridge, New Museums Site, Cambridge CB2 3RA, UK Abstract...

The Economics of Process Measurements

Apr 2, 2012
Douglas C. White
What is the economic value of a new measuring device in a process plant – a new analyzer, a more accurate flow measurement, an additional temperature or pressure measurement, etc.? Excluding the minimum set of measurements required to safely operate the plant and meet regulatory requirements, how...

Advanced Control of Multiple Sulfur Recovery Units

Apr 2, 2012
Darwin Logerot
Sulfur Recovery in a Refinery entails collecting sour vent gases (containing H2S) from a number of sources, including Hydrotreaters, Hydrocrackers, Crude Units, and others, then converting the H2S to a more useable form such as sulfuric acid or elemental sulfur. The feed rates and compositions to...

Look Ma No Faceplates: Benefits of In Situ Modification of Set Point and Output

Apr 2, 2012
Dustin Beebe
This presentation illustrates the need and solution for operators viewing and making changes to set points and outputs in context. It shows the penalty and risks of operators shifting focus to faceplates and performing other window management tasks when trying to operate an industrial process. In-...

All Sulphur Plants Are Not Created Equal

Apr 2, 2012
Angela Slavens
All Sulphur Plants are Not Created Equal ABSTRACT Sulphur recovery from natural resources is required to meet environmental regulations on sulphur content in final products, as well as SO x emissions restrictions imposed on processing facilities. While sulphur recovery facilities in oil refineries...

Phase Behavior of Poly-Substituted Mono-Nitrated Aromatic Compounds

Apr 2, 2012
William Pittman
Mono and poly-nitrated aromatic compounds are used to make products in a variety of industries. The reactions that produce them are often highly exothermic and present a very high risk of thermal runaway. Recent work has shown that nitrobenzene can form 3 phase systems with concentrated sulfuric...

Pressure Relief Valve Sizing Equations Basis

AIChE Webinar
Mar 14, 2012
Aubry Shackelford

Engineers responsible for the sizing of pressure relief valves, will get a more in-depth understanding of the mathematical basis for the sizing equations.

Explosion Protection with In-Line Flame Arresters

AIChE Webinar
Feb 29, 2012
Michael Davies

This seminar educates participants on explosion protection concepts regarding in-line flame arresters. It begins by demonstrating flame arrester function with short video sequences.

Two-Phase Gas/Liquid Pipe Flow and Relief Sizing

AIChE Webinar
Feb 15, 2012
Ronald Darby

Learn methods for identifying flow regimes and determining friction loss in two-phase distributed and homogeneous gas/liquid pipe flows and sizing relief valves for frozen and flashing homogeneous two-phase flow.

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