SGC Step Grate Combustion
Also known as a reciprocating grate. It is the fundamental component of biomass and waste boilers.
Designed to master complex fuels (high moisture and ash content), our system guarantees more than 8,200 hours of continuous operation per year.
Unrivaled Operability
Its robustness and automatic cleaning system allow the installation to operate for more than 8,200 hours per year with the possibility of performing only a single technical shutdown.
Maximum Thermal Efficiency
The refractory brick vault acts as a reflective mirror for radiation, significantly improving the evaporation of water contained in the fuel.
Advanced Combustion Control
Primary and secondary air flows are electrically modulated and injected into divided zones below and above the grate, achieving an optimal process based on energy demand.
Fuel Savings
The overlapping and inclined grate design with lateral tongue-and-groove prevents fuel from falling through gaps, resulting in significant savings and reducing the concentration of unburned materials.
It is a robust combustion chamber, the result of extensive experience, with walls covered by a combination of multiple refractory and insulating layers to favor the combustion process and prevent heat loss. The grate is mechanical, hydraulically driven with a reciprocating motion. To withstand extreme conditions, it is manufactured from special high-alloy chrome casting (Cr 27 Ni 4).
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Energy from waste and biomass
Essential for energy production (electricity or thermal). Ideal for the energy recovery of RDF (Refuse Derived Fuel) and for the combustion of biomass from various sources.
Aftersales Services
Maintenance, technical service and spare parts. Minimise downtime, maximise results.
Step Grate Combustion en acción
Showroom and training
Bianna Greenways, to see our plants and equipment in real operation
Especificaciones técnicas
Tolva de alimentación
Fuel entry point to chamber 2
Hydraulic drive
Mechanism that enables independent movement of the grate zones
Zone 1: Drying and gasification
First stage where heat removes moisture from waste 4
Zone 2: Main combustion (oxidation)
Area where most energy is released through intense burning of the material. 5
Phase 3: Burnout and ash formation
Point where the material is fully consumed, turning into ash.
Gas outlet
Primary air
Secondary air
Ash discharge
Gases
Air
Ash
Material
Prestaciones y componentes
Operation
Grate combustion with total process control
The fuel is metered and advanced over the grate by means of a continuous reciprocating motion. The process is divided into three working zones (drying/pre-combustion, combustion, and extinction/slag outlet). Primary air is injected from below the grate (cooling and combustion air), and secondary air is introduced from above to complete the oxidation of volatiles. Ash and slag are extracted dry and continuously by a system of scrapers with inclined blades and reciprocating motion, hydraulically driven.
