Pyroflex FSR

Flat moving grate firing system 850 to 8000 kW

Specialist for the wood industry

The wood-burning system Pyroflex FSR is designed for the wood industry. The generously dimen­sioned combustion chamber volume and the extensive use of refractory material guarantee low-emissions operation, even with fuels such as chipboard and MDF. The low-NOx combustion chamber is designed with primary-side measures such as air staging to reduce NOx emissions.

Flat moving grate firing system FSR

State-of-the-art combustion technology


Fuels:
Logging and sawmill scraps
Wood processing scraps
Chipboard
MDF
Saw shavings
Pellets

The wood-burning system Pyroflex FSR is designed for the wood industry. The generously dimen­sioned combustion chamber volume and the extensive use of refractory material guarantee low-emissions operation.

Flue gas recir­cu­lation “over” and “under” the grate

The flue gas is drawn into the exhaust line and reintro­duced to the combustion chambers “over” or “under” the grate with a fan. This decreases the flame tempe­rature and reduces nitrous oxides. The efficiency of the system is increased as a result since a lower residual oxygen content remains in the flue gas, even in the case of dry fuels.

For the flue gas recir­cu­lation “under” the grate, the recir­cu­lated flue gas is mixed with the primary air in mixing chambers and then reintro­duced under the grate. The flue gas recir­cu­lation “under” the grate also results in more complete combustion and prevents slag formation on the grate.

Hydrau­li­cally driven flat moving grate

The grate of the Pyroflex FSR is divided into two or three independent grate zones (depending on the unit size). The fuel is distri­buted over the entire grate surface. To achieve optimally complete combustion even with difficult fuels, the grates in the different zones can be operated at different speeds.

Minimal life cycle costs

We place the utmost impor­tance on durability and a long lifespan for our systems. This is achieved by using robust system components. Solid steel construction and the use of high-quality refractory material guarantee reliable system availa­bility for many years. The large grates and the above-average firebox volume signi­fi­cantly reduce wear. Thanks to frequency-controlled screws, grate drives and flue gas recir­cu­lation, we can guarantee minimal power consumption in all load states of the system.

Equipment and access­ories

Measu­re­ments in the primary air and recir­cu­lation air

To achieve optimal combustion results and emissions values in all load stages, including with difficult fuels, the flow rates of primary air and flue gas recir­cu­lation are measured and the required air quantities are calcu­lated in advance. The grate of the Pyroflex FSR is divided into four independent primary air zones. This allows the required air quantities to be adapted to the fuel.

Use of high-quality O2 probes

The secondary air flow rate is regulated based on the detected oxygen level. High-quality O2 probes make it possible to maintain a conti­nuously low residual oxygen level in the flue gas (approx. 4–5% O2 (damp) – depending on the fuel). This allows the highest levels of efficiency to be achieved even in modulating partial load operation.

Automatic ash removal

Several variants are available for removing ash from the combustion chamber as well as the cyclone and electro­static