WOOD MATIC SGM

Standard design pressure 2 bar

Fuel fed using a sloped mobile grate, allowing effective control of the thickness of the bed even with softening and partial melting of the ash and ensuring the latter is conveyed to the ash dump for mechanical removal.

Our specially conceived screw feed assembly, the result of a single boiler-mechanical burner design.

Undergrate divided into sealed compartments for differen-tiated combustion air supply.

Large and completely dry combustion chamber with rebound vault and reverse flue gas flow for optimum drying of damp fuel.

Two-stage combustion, with grate-level gasification and a wide range of primary air/secondary air ratios according to the type of fuel used. Secondary air injected by independent high-turbulence system.

High-quality mixed cast and brick refractory cladding according to the zone, tube bundle and shape of flue gas path guarantees minimum cleaning operations and complete accessibility through the side doors.

The bed that supports the boiler houses the combustion chamber, and is completely lined by special bricks for high-temperature combustion; it is cooled by water tubes to eliminate the heat radiated from the outer walls.

Thermostatic system for automatic screw advance and optional fire safety device.

High combustion efficiency, normally above 85%.

All this is incorporated in a single compact rapid to install unit with relatively small dimensions. These boilers can be operated in ON-OFF mode; the fuel system can be calibrated for outputs lower than the maximum.

CERTIFICATION

• CE Mark in accordance with following Directives:
• Machinery (2006/42 EEC)
• Low Voltage (2014/35/UE)
• Electromagnetic Compatibility (2014/30/UE)

ACCESSORIES AVAILABLE ON REQUEST

Continuous heat output modulation: allows the heat input to be reduced continuously from 100% to 50% minimising the number of boiler shut-downs. A programmable logic controller connected to the water outlet temperature probe varies the rotation speeds respectively of the fuel feed screw and the combustion air fans using inverters.

Draught regulator: this keeps the draught in the combustion chamber constant. It consists of a sensor device and a motor-driven throttle valve on the centrifugal dust separator assembly bypass duct or the flue gas exhaust inverter. This is important in terms of limiting dust emissions.

Ignition or pilot burner: allows automatic initial ignition of solid fuel, essential for materials with a high moisture content. One-piece unit with one flame (~0.25 MW), can operate on oil or natural gas. A pneumatic system automatically controls its entry into and return out of the boiler. In the automatic version, the electrical logic also allows this to be used for a further reduction in the CO content of the flue gas.

Analyser with continuous control: reading on display of CO - O2, flue gas temperature (required by legislation for heat outputs exceeding 1 MW).

System for recording data on flue gas emissions: the Trend View program connected to the boiler acquires, processes, calculates and averages out all the information received continuously, and then provides the data in table form (as required by certain legislation). The software must be installed on a PC (not supplied) and is connected to the electrical panel via Ethernet protocol.

SBS shockwave cleaning system: this reduces the required frequency for cleaning the tube bundle and ensures the heat exchanger works efficiently over time. The system is made up of a series of shockwave blowers fitted on the boiler structure, and a timer to manage correct operation. The residual dust from combustion removed from the tube bundle is carried by the flue gas and decants in the filtration system downstream of the boiler. The system works with the boiler operating.

Flue gas recirculation in the combustion chamber for NOx reduction: the system allows combustion to occur at a constant and lower temperature than combustion without recirculation. Clearly, when there are high percentages of nitrogen in the fuel, even flue gas recirculation will be insufficient.

COMPATIBLE FUEL TYPES

Waste from the first and second processing of untreated wood and cork.

Biomass (plant waste from agricultural and forestry activities and from the first processing of agricultural and food products, depleted pomace, grape seed, grape seed flour, fruit residues, peels and other plant residues).

Wood pellets.

Treated wood processing scrap and similar material (glued chipboard or multi-ply and products finished with resins of the type and in the quantity admissible according to legislation on waste reuse). Minimum temperature of softened ash: 800°C.

Maximum percentage of ash in dry fuel: 4%.

MAXIMUM GRAIN SIZE ALLOWED, FUEL MOISTURE CONTENT, GUARANTEES ON THE COMBUSTION PROCESS AND EMISSIONS, will be defined contractually, based on specific requirements..