OIL AND GAS FIRED PROCESS HEATERS
Therma-Chem have been cleaning process
heaters online throughout the world for over 30 years. FS12, our unique alkali solution, is injected into the radiant section and disperses throughout the heater removing deposits from all heat transfer surfaces increasing efficiency, preventing corrosion and reducing emissions.
FS12 will reduce bridgewall temperatures, eliminate Vanadium Pentoxide corrosion and prevent dew-point corrosion in the air pre-heaters and economisers.
Metal skin temperatures for a Process Heater after Therma-Chem FS12 injection shows a significant reduction in metal skin temperature fluctuations and elimination of hot spots.
How FS12 Benefits Heater Performance
Reduce bridgewall temperature and eliminate Vanadium Pentoxide corrosion
Reduce bridgewall temperature
and eliminate Vanadium Pentoxide corrosion
Improve heat transfer and prevent
finned tube blockages
Prevent dew point corrosion from
WASTE HEAT BOILER
Prevent fouling and corrosion
Improve performance and reduce
Improve particulate removal and
reduce cleaning time
INDUCED DRAFT FAN
Improve performance and
Reduce NOx, SOx and
How Does FS12 Work?
FS12 WILL REDUCE
NOX, SOX AND
BY UP TO 20%.”
Therma-Chem’s FS12 is an mildly alkaline solution containing nitrates that is designed specifically to clean process heaters online. Using Therma-Chem’s proprietary injection system, the liquid is injected directly into the combustion chamber, vaporises and is carried by the flue gas through the unit, encountering all heat transfer surfaces including the radiant section, convection section, air pre-heater and waste heat boiler.
FS12 reacts with existing hard deposits and fouling on tubes by increasing their melting point and reduces them to soft powdery ash.
This allows units to maintain high thermal efficiencies or recover capacity (if this was limited by fouling). FS12 also neutralises sulphur deposits on the cold end of the flue gas path preventing cold end corrosion and eases man entry during a maintenance or inspection shutdown.
In addition, FS12 will reduce NOx, SOx and Carbon emissions by up to 20%.
Using FS12 ultimately results in improved heat transfer, prevention of both high temperature and low temperature corrosion, improved operating efficiency and reduced emissions.
- Crude Distillation Units
- Vacuum Distillation Units
- Waste Heat Boilers
FS12 is traditionally applied to process heaters in one of three ways
Applied daily, FS12 keeps heaters 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.
Utilised in the run up to a shutdown to facilitate a more effective and easier clean of a heater FS12 can be applied 3-4 times per day for a period between 30 – 60 days. This ensures that during the shutdown, cleaning is more effective, easier, quicker and any vanadium pentoxide and sulphurous deposits are neutralised, dry and entry into all areas of the heater is safe and comfortable.
ON-LINE RECOVERY CLEANING
The most popular method of introducing Therma-Chem to clients, FS12 is applied when a heater is load and/or temperature restricted mid-run and there is no window to shut the heater down for maintenance. Injected 3-6 times per day over a period of 30-90 days, depending on the severity of the fouling and the configuration of the unit, FS12 can target any part of the heater loosening deposits and restoring performance