Circulating Fluidized Bed Boilers

Reliable low carbon power heat and steam.

Circulating fluidized bed (CFB)

Circulating fluidized bed (CFB) boilers use all kinds of solid fuels, from  biomass to refuse derived fuel (RDF), to produce reliable and efficient clean energy. Fuel flexibility is at the core of CFB technology, contributing to fossil fuel and CO2 emissions reduction while using local alternative renewable fuels.

We provide comprehensive engineering services to our customers ranging from advisory and planning to design, procurement, construction, and after-sales services. Besides our design and development bases in Finland and Japan, we have engineering, sales, manufacturing, and service offices across Asia and Europe. We have delivered more than 500* CFB boilers to a wide range of customers, from in-house industrial steam generation to thermal power stations in the utility sector.

Green Energy Centre, Daegu, South Korea


1. A wide range of fuels for today’s and future needs.

Fuel-flexibility is critical for new plants to maximize inexpensive fuels and avoid unpredictable prices and supply risks in the future. CFB is the only boiler technology providing both high-efficiency combustion and vast fuel-flexibility at the same time. The multi-fuel CFB can co-fire a wide range of fuels, with up to 100% biomass or RDF streams.

2. High-efficiency and reliability in the harshest conditions.

By recirculating the bed material through a cyclone, CFB technology achieves a high combustion efficiency even for fuels that are difficult to burn. Designed to stand the harshest conditions, CFB boilers can better resist tube corrosion, wear, and ash adhesion, making high-temperature, high-pressure steam conditions possible for all fuels. For large-scale plants, ultra-supercritical steam at 257 bar and 603 °C is available. With an average 98% boiler availability, we focus on customer ROI by delivering on time and according to the specifications.

3. Low emissions by design.

The CFB design eliminates the need for traditional flue gas desulphurization (FGD) systems by capturing sulfur oxides (SOx) inside the furnace using limestone as sorbent. Nitrogen oxides (NOx) are avoided by low-temperature combustion. The CFB produces less than 50 ppm SOx and NOx at 6% O2 without a flue gas cleaning system. Particulate matter is kept below 20 mg/m3 at 6% O2 with an electrostatic precipitator.

4. Dependable, carbon negative heat & power.

CO2 emissions in CFBs are lower than other thermal power technologies due to high-efficiency and the ability to use low-carbon fuels, such as biomass and agriculture residues. To take a step further and meet the most challenging climate targets, we have developed the Flexi-Burn® technology. It utilizes oxyfuel combustion to create a concentrated CO2 stream (flue gas) that can be readily captured and utilized or stored. This proven technology is available for new plants and retrofits and allows plants to achieve zero or even negative carbon emissions if biofuels are utilized.

5. SHI Group’s high-quality standards.

The Niihama Research Center, located in our Niihama Works, is equipped with pilot-plant facilities to conduct preliminary tests with our customers’ actual fuels. The results of the tests are used for accurate equipment design, ensuring high performance and quality.

The boiler pressure-parts, which are critical to safe and reliable operation, are manufactured at our own workshop or carefully selected partner factories. For other parts, we have established a supply chain in long-term cooperation with reliable vendors to ensure the equipment meets our high-quality standards.