The VFE air-injection furnace with high-temperature flue gas combustion for the energy recovery of residual wood generated during wood processing
1. Secondary air supply
2. Combustion chamber
3. Fuel supply
4. Automatic ignition system (optional)
5. Exhaust gas recirculation supply
6. Combustion chamber door
7. Pneumatic boiler cleaning
There is almost no alternative to a horizontal discharge for discharging silos with larger diameters and / or large filling heights. This system is distinguished by its sturdy design and fault-free operation. A silo emptying is possible as an alternative besides stoking the boiler system
The silo cone discharge works in a similar way to an agitator and ensures that the usually dry fuel is refilled automatically. The effective diameter of the conical screw discharge system can be between 4 and 6 metres. Especially suitable for round silo bases.
With the LogicPro V4, we are introducing a completely redesigned control system that sets new standards in user-friendliness, technological integration, and efficiency. This new generation has been specifically tailored to meet the high demands of modern biomass combustion plants—both technically and in terms of ease of use.
Three key aspects were central to the development of the LogicPro V4: modern design, maximum user-friendliness, and the
use of the latest web technology. This combination enables particularly intuitive operation and powerful control of the system. The result is an interface that provides all relevant information at a glance while flexibly adapting to individual requirements.
A key feature of the new user interface is the integration of HTML5 technology. This enables a platform-independent, high-performance, and future-proof display of all user content. Compared to traditional control interfaces, HTML5 offers numerous advantages:
Optional combustion chamber camera for visual inspection of the combustion chamber via remote access.
When wood is burned, nitrogen oxides are formed from the nitrogen in the fuel. The nitrogen oxides (NOx) in the flue gas can be reduced by the SNCR process so that the legal guidelines are not exceeded.
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The very dry, powdery fuel is blown in to the fully fireclay-lined and high-quality insulated combustion chamber via one or more injection lines. The blow-in process, combined with a specially designed combustion chamber geometry, ensures optimal fuel combustion as well as the necessary turbulence and flow conditions.
The fuel is injected according to the injector principle. This means that no fuel enters the injection fan, thus preventing wear on the fan caused by the fuel.
Heat storage in the fireclay mass ensures the correspondingly high combustion chamber temperatures, which guarantee very low emission values. A horizontal 3-pass fire tube boiler or cooling-screen boiler is installed on top of the combustion chamber as a high-temperature hot water boiler. Depending on requirements, steam heat exchangers or thermal oil boilers can also be supplied.
The VFE was developed specifically for industrial wood processing. Even fuels such as MDF or particleboard scraps pose no challenge to the combustion box.
The low NOx combustion chamber is designed with primary-side measures, such as air staging, to reduce NOx emissions. The control of the primary air supply, in combination with flue gas recirculation, ensures sub-stoichiometric combustion in the reduction zone.
Secondary air is supplied after the combustion chamber’s reduction zone. The corresponding firebox geometry, combined with the combustion air supply, ensures high turbulence and mixing with the flue gas, thereby achieving optimal oxidation (CO burnout) of the combustion gases.
In addition to energy demand, the type, particle size, and water and ash content of the fuel are the most important factors in selecting the right box. However, annual operating hours and the annual load curve are also important factors.
