LNG
Steam turbines have long been the favored propulsion choice for LNG carriers and the boilers traditionally used to power the vessels present a unique application for FuelSpec®. Although many in the industry are moving to a tri fuel system utilized in a DFDE engine (all of which can be treated with FuelSpec®), there are added benefits when using it in marine boilers.
There are three distinct problems in steam boilers from the use of fuels containing high levels of contaminants and sulfur:
- Superheater and Water Wall Deposits and Corrosion
- Sulfuric Acid in Exhausts – Acid Rain – Cold-end Corrosion from Sulfuric Acid
- Emissions – NOx and Particulate Matter
An advantage of using FuelSpec® in boilers is its capacity to raise the melting point of ash from the fuel reducing corrosion and deposit on superheater tubes and water walls.
Cold-end corrosion is caused by formation of sulfuric acid from sulfur in the fuel. Sulfuric acid condenses below 175° C on air preheaters leading to severe deposits and corrosion. This problem can be reduced or eliminated with oil soluble magnesium in the catalyst formulation. This treatment reduces sulfuric acid in the emissions as well.
Combustion catalysts are used to enhance the combustion process leading to reduced NOx, smoke and carbon particles in the exhaust and reduced fuel consumption through more efficient use of the fuel. SFA International discovered a new iron-magnesium combination that results in much improved performance over other metals known to catalyze combustion.
We recommend FuelSpec® 118-1502 colloidal iron-magnesium patented catalyst for use in large steam boilers. As with all other applications, we supply additive dosing equipment to ensure that the product is properly added and mixed into the fuel for best results.
FuelSpec® used in boilers has shown:
Longer Equipment Life
Less Downtime for Maintenance and Repair
Reduced Smoking and Pollution
More Efficient Heat Generation and Better Fuel Economy