(94b) Overview of the Mechanisms of Fouling In Pre-Heat Trains and Conclusions Regarding Operating Practice
AIChE Spring Meeting and Global Congress on Process Safety
2011
2011 Spring Meeting & 7th Global Congress on Process Safety
14th Topical on Refinery Processing
Tutorial On Fouling and Design of Crude Pre-Heat Trains
Wednesday, March 16, 2011 - 8:30am to 9:00am
The fouling of heat exchanger surfaces in exchangers used in pre-heat tarins can be the result of a variety of mechanisms.
Below the de-salter fouling can be the result of wax deposition, particulate deposition, or the deposition of salts.
The exchangers positioned immediately after the de-salter should exhibit little fouling. However, if the de-salter is not operating properly the depsoition of inorganic salts can be a significant problem. If slops are being inappropriately handled, then polymer gum formation can lead to high fouling rates.
At the hot end of the deposition of asphaltenes is the most likley cause of fouling.
If insufficient heat recovery has been achieved in the pre-heat train then high fouling rates can be encountered in the convective section of the fired heater. This can give rise to excessive coke production. With VDU's excessive fouling in the fired heater can result in excessive quanities of coke being fed top the distillation column and fouling of the clumn itself.
These various mechanisms and problems are reviewed.
Suggestions regarding operating practice are made.
Checkout
This paper has an Extended Abstract file available; you must purchase the conference proceedings to access it.
Do you already own this?
Log In for instructions on accessing this content.
Pricing
Individuals
2011 Spring Meeting & 7th Global Congress on Process Safety
AIChE Pro Members | $150.00 |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $225.00 |
Non-Members | $225.00 |
14th Topical on Refinery Processing only
AIChE Pro Members | $100.00 |
Fuels and Petrochemicals Division Members | Free |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $150.00 |
Non-Members | $150.00 |