Furnace Sorbent Injection (FSI)

FSI technology involves the injection of sorbents directly into the furnace/boiler or mixed with the fuel. This technology is mainly used in Waste-to-Energy and biomass plants.

The field of action of the sorbents goes from acid gas emission control (like SO₂ peaks or HF emission control) to the reduction of the fouling and slagging issues that take place in the furnace/boiler. The product can also have a dual effect.

Under FSI conditions, the acid gas capture (SO₂ removal) is very efficient because of the high reaction temperature and the absence of competitive reaction with CO₂.

The injection of sorbents also reduces the slagging/fouling issues by increasing the melting temperature of the boiler ash.

The benefits vary depending on the sorbent used. Our experts will analyse your unique situation and tailor a specific solution for you. Our solution will include recommendations on the best injection points in the furnace/boiler, best sorbent, trial test equipment and best technologies to inject our sorbents.

Depending on the sorbent used, you will have the following benefits:

Acidic gas removal:

• Improved SOx capture
• Debottlenecked Flue Gas Treatment (FGT)
• Savings on incumbent FGT reagent
• Reduced residue disposal costs.

Anti-slagging/Antifouling:

• Higher capacity of heat transfer
• Increased waste throughput
• Reduced maintenance and cleaning costs.

Sorbacal^® Heat is the newest range of Lhoist products for this application. This product range includes sorbents based on calcium, magnesium, or other minerals. Each product will be tailor-made based on our customer needs.