Prevent slagging and fouling on marine boilers.

Steam Boiler
Marine Economizers
Therma-Chem MB9
Produced for the shipping industry, MB9 was specifically designed to target marine boilers and the unique difficulties they present. MB9 will remove slagging and fouling throughout the boiler and will reduce the time spent in dock for boiler maintenance.
shipping mid1 - Shipping
How does MB9 work?

MB9 is a mildly alkaline solution containing nitrates that is designed specifically to clean marine boilers online. Similar to land based operations, MB9 is injected using Therma-Chem’s proprietary injection equipment which will be installed on the ship. Injected directly into the combustion chamber, MB9 is carried by the flue gas throughout the unit encountering all heat transfer surfaces including the wall tubes, superheaters, reheaters and economisers.

MB9 reacts with exisiting hard deposits 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). MB9 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, MB9 will reduce NOx, SOx and Carbon emissions.

Using MB9 ultimately results in improved heat transfer, prevention of both high temperature and low temperature corrosion, improved operating efficiency and reduced emissions.

Before and After
(Swipe left/right over image below to hide/reveal)
left1 - Shipping
rigth1 - Shipping

Therma-Chem have significant experience
in installing our injection equipment on ships,
particularly LNG vessels. During docking,
Therma-Chem engineers will install our
equipment on the ship to enable simple
injections of MB9 into the boiler.

Application Methods
terma logo - Shipping


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.

terma logo - Shipping


Utilised in the run up to a shutdown to facilitate a more effective and easier cleanof 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.