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OIL AND GAS FIRED PROCESS HEATERS

Reduce Emissions

Increase Efficiency

Restore Capacity

Therma-Chem FS12

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.

Before Injection
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After Injection
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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

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TC Process Heater diagram - OIL AND GAS FIRED PROCESS HEATERS

RADIANT SECTION

Reduce bridgewall temperature
and eliminate Vanadium Pentoxide corrosion

CONVECTION SECTION

Improve heat transfer and prevent
finned tube blockages

AIR PRE-HEATER

Prevent dew point corrosion from
sulphuric acid

WASTE HEAT BOILER

Prevent fouling and corrosion

BAGHOUSE FILTER

Improve performance and reduce
maintenance

ESP

Improve particulate removal and
reduce cleaning time

INDUCED DRAFT FAN

Improve performance and
prevent corrosion

STACK

Reduce NOx, SOx and
Carbon emissions

How Does FS12 Work?

FS12 WILL REDUCE
NOX, SOX AND
CARBON EMISSIONS
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.

Applicable Units

  • Crude Distillation Units
  • Vacuum Distillation Units
  • Platformers
  • Reformers
  • Reheaters
  • Waste Heat Boilers
  • HRSG

Application Methods

FS12 is traditionally applied to process heaters in one of three ways

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MAINTENANCE DOSING

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.

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PRE-SHUTDOWN CONDITIONING

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.

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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