CRUDE AND VACUUM DISTILLATION UNITS
Maximise throughput and eliminate load restrictions via online cleaning.
• High flue gas exit temperatures
• Reduced heat transfer
• Finned tube blockages
• Vanadium Pentoxide corrosion
• Sulphur corrosion
Before Injection – May
After Injection – September
Metal skin temperatures on a Crude Distillation Unit after Therma-Chem FS12 injection shows a significant reduction in metal skin temperature fluctuations and elimination of hot spots.
COMBUSTION CHAMBER
Eliminate slagging and improve
heat transfer.
FS12 removes slagging from the tube walls and converts it to dry, friable powder. This results in increased heat transfer and restored capacity.
SUPERHEATERS
Prevent high temperature corrosion
ECONOMISER
Limit fouling and maintain flue gas velocity
BAGHOUSE FILTER
Improve performance and reduce maintenance
AIR PRE-HEATER
Prevent dew point corrosion from sulphuric acid
ESP
Improve particulate removal and reduce cleaning time
STACK
Reduce NOx, SOx and
Carbon emissions
INDUCED DRAFT FAN
Improve performance and
prevent corrosion
Slagging and fouling in the radiant section will result in increasing bridgewall temperatures which can lead to restrictions on throughput. Applied online, Therma-Chem FS12 will remove aged deposits by increasing their melting point, reducing them to soft powdery ash. This results in increased heat transfer and a reduction in the bridgewall temperature.
Therma-Chem FS12 also converts Vanadium Pentoxide into non-corrosive vanadates and vanadites preventing high temperature corrosion in the radiant section. As Vandium Pentoxide is the catalyst for converting SO2 to SO3, this also prevents the formation of sulphuric acid in the cold end of the heater. Nonetheless, should there be any sulphuric acid in the cold end, Therma-Chem FS12 will convert this to non-corrosive sulphates and sulphites. Therefore, Therma-Chem will completely eliminate corrosion throughout the unit.
MAINTENANCE DOSING
Applied daily, FS12 keeps units clean and prevents costly drop offs in performance and avoids the possible need for shutdowns during the operating campaign. This is the most common method of application with some customers having used Therma-Chem every day for 15 years across multiple units.
ON-LINE RECOVERY CLEANING
When a unit is load and/or temperature restricted mid-run and there is no window to shut down for maintenance, FS12 is introduced to recover performance. Injected 3-4 times per day over a period of 30-90 days, depending on the severity of the fouling, FS12 can target any part of the unit loosening deposits and restoring performance. We would then recommend switching to Maintenance Dosing to prevent a drop-off in performance recurring.
PRE-SHUTDOWN CLEANING
Utilised in the run up to a shutdown to facilitate a more effective and easier clean of a unit, FS12 can be applied 3-4 times per day for a period between 30 – 90 days.This ensures that during the shutdown, cleaning is more effective, easier, quicker and any vanadium pentoxide and sulphuric deposits are neutralised, dry, and entry into all areas of the unit is safe and comfortable.
52 Crossgates
Bellshill
ML4 2EE
Scotland, UK
+44 (0) 1698 767 575
[email protected]
