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COAL, OIL AND BIOMASS FIRED BOILERS

Reduce Emissions

Increase Efficiency

Restore Capacity

Therma-Chem FS12
Therma-Chem have been providing online boiler cleaning services throughout the world for over 30 years. FS12, our unique alkali solution, is injected into the combustion chamber and disperses throughout the boiler removing deposits from all heat transfer surfaces increasing efficiency, preventing corrosion and reducing emissions.
Before Injection
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After Injection
coal 2 - COAL, OIL AND BIOMASS FIRED BOILERS
Fouling completely removed from the superheater tubes by Therma-Chem FS12 treatment
How FS12 Benefits Boiler Performance
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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

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.

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