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Chemical Process Technology

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Chemical & Process Technology

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Friday, July 20, 2007


If you plant / maintenance engineers, you probably interested to the following articles...

POLARIS, a Heat Exchanger manufacturer from Denmark. POLARIS supply Plate-and-Frame, Brazed, Safety-Pair Double-Wall Plate, Semi-Welded Plate and Free-Flow Plate Heat Exchangers.
FREE Operation and Maintenance Manual Available for download from POLARIS

Simpel operation guideline presented in the manual for Brazed Heat Exchanger. It covers how a brazed heat exchanger is operated, application, specification and advantages of brazed heat exchanger, installation guide, start-up & shutdown as well as cleaning procedures.

Plate-and-Frame Heat Exchanger Operation and Maintenance Manual
This manual briefly discusses a Plate Heat Exchanger Construction, function and characteristic, the gasket design, installation and start up procedures, maintenance & cleaning procedures.
Further reading...









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posted by Webworm, 8:20 AM | link | 0 Comments |

Tuesday, July 17, 2007



"Cooking a Vessel"

Have you ever heart of this term in Process Engineering ???

This term probably mean heat up (and circulate when possible) a solution inside a dirty or impure vessel for the sake of dissolving or simply rinsing out the internals prior to sweeping it with a semi-pure fluid and conditioning the vessel for production service.
This is a necessity when you done internal work inside a distillation column, for example, during an annual turn-around and there are traces of grease, oils, and gasket adhesive and other "goodies" inside the assembled and repaired internal parts. In order to ensure that all these impurities are not mixed in with the finished product, the column, reboiler, condenser, associated vessels and all their internals are "cooked" with a hot fluid - usually a solvent or a hot caustic solution - in order to rinse and sweep out all undesired impurities left in the vessels after human entry.Other Forum members may have the same terminology for other techniques used in their plants.
Source : Art Montermayor
During precommissioning / commisioning phase, some system may required acid cleaning in order to remove grease, oil, corrosion stuff, welded slag, etc. Through acid cleaning, it may oxidize metal surface layer so that it form a strong and corrosion resistance layer for vessel protection. Sometime, it called passivation and "cooking a vessel" in layman term.









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posted by Webworm, 1:24 AM | link | 0 Comments |

Wednesday, May 30, 2007

Today, wanna to bring to you a thesis related to OPRATION AND CONTROL OF AZEOTROPIC DISTILLATION COLUMN...this document may be a bit acedemic but it may bring certain level of benifits to many of us (Chemical & Process Engineers)...Enjoy...
This document bring us something relates to
- a concept for the design of heterogeneous distillation columns under aspects of operability.
- a self-optimizing control concept is provided for a sequence of three homogeneous azeotropic distillation columns with two recycles (boundary separation scheme)
- a short cut method is developed to compare the performance of homogeneous and heterogeneous sequences based on the sum of the reboiler duties for identical equipment
Operation and Control of Azeotropic Distillation Column Sequences
A doctoral thesis from the Automatic Control Laboratory (IfA), Swiss Federal Institute of Technology (ETH) Z¨urich.
Jan Ulrich
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posted by Webworm, 5:32 PM | link | 0 Comments |