Flat moving grate firing system 180 to 2600 kW
The flat moving grate firing system is particularly suited to the combustion of wood fuels with a water content up to 55% and an ash content of 6%. Key advantages include the use of a variety of fuels plus a low dust content in the flue gas thanks to the resting fuel bed.
State-of-the-art combustion technology
Fuels:
Logging and sawmill scraps
Wood from landscaping
Bark
Wood processing scraps
The Pyroflex FSB is characterised in particular by flexible use of various wood fuels plus a low dust content in the flue gas thanks to the resting fuel bed.
Flat moving grate firing system
We generally use low-NOx reduction technology in our flat moving grate firing systems. The combustion chamber is equipped with an NOx emission reduction system on the primary side. Regulation of the primary air supply together with flue gas recirculation ensures substoichiometric combustion in the reduction zone. Secondary air is injected into the oxidation zone within the ceramic-lined portion of the combustion chamber. This air injection ensures high turbulence and mixing with the flue gas, resulting in optimal oxidation (CO burnout) of the combustion gases. Ideal emissions values are achieved thanks to these measures.
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 for the biomass boiler and the use of high-quality refractory material guarantee reliable system availability for many years. Minimal power consumption in all load states of the system is ensured by frequency-controlled screws, grate drives and flue gas recirculation.
Equipment and accessories
| Type | Output range* |
|---|---|
| FSB 180 | 45 to 180 kW |
| FSB 220 | 55 to 220 kW |
| FSB 280 | 70 to 280 kW |
| FSB 350 | 87 to 350 kW |
| FSB 440 | 110 to 440 kW |
| FSB 550 | 137 to 550 kW |
| FSB 700 | 175 to 700 kW |
| FSB 850 | 212 to 850 kW |
| FSB 1100 | 275 to 1100 kW |
| FSB 1400 | 350 to 1400 kW |
| FSB 1700 | 425 to 1700 kW |
| FSB 2100 | 525 to 2100 kW |
| FSB 2600 | 650 to 2600 kW |
*Depending on fuel and water content
TÜV
The Pyroflex FSB is tested and certified according to the Machinery Directive and DIN EN 303-5 and is subject to continuous monitoring by TÜV.
- 3-pass boiler (6 bar – higher pressure ratings on request)
- Safety heat exchanger (integrated into boiler)
- Flat moving grate, hydraulically driven
- Injection of secondary air
- Injection of flue gas recirculation
- Intermediate vault
- Automatic combustion chamber ash removal
- Fuel infeed, hydraulic or with screw
- Pneumatic boiler tube dedusting (optional)
- Firebox door
Profit from these benefits:
- Fully automatic wood-burning system with flat moving grate
- Fuel water content: 6 to 55%
- Staged combustion (low-NOx technology)
- Lower pollutant emissions thanks to resting fire bed
- High efficiency (up to 92%)
- 3-pass flame tube-flue tube boiler with flue gas temperatures below 190 °C at full load
- Highly insulated, fully ceramic-lined combustion chamber design and optimally designed combustion air supply guarantee complete combustion of all fuels
- Safety heat exchanger integrated into boiler
- Sliding load regulation from 25 to 100% of the rated heat output in compliance with the emissions values (fuel-dependent)
Optional accessories
- Pneumatic boiler tube dedusting (significantly extends the time between cleanings)
- Automatic ignition system (automatic ignition for fuels with a water content of up to 35%)
- Flue gas recirculation “under” the grate runs behind the lining. (Increases efficiency and reduces nitrogen oxides, plus cooling of the grate)
- Remote maintenance and visualisation systems (full system access from a PC, tablet or mobile phone)
- Raising of the flue gas temperature (to avoid condensation in the flue gas path and in downstream components)
- Nitrogen oxide reduction system (for reducing of NOx emissions with the SNCR method)
- Continuous emissions measurement
Example installation
Wholesale nursery (heating of greenhouses)
Firing system: Pyroflex FSB
Output: 1700 kW
Fuel: Forest wood chips M45
- Fuel storage with moving floor discharge
- Hydraulic fuel transport with direct infeed
- Firing system Pyroflex FSB
- Ash removal from the combustion chamber into 800 l container
- Flue gas cleaning by electrostatic filter with integrated multicyclone separator
- Flue system
- Pneumatic boiler tube dedusting (optional)