Equipment
Combustion Air
In order to achieve a complete combustion of all combustible components of Solid Fuel with all the Oxygen, sufficient space, Time, Turbulence and Temperature high enough to ignite the components must be provided.
Combustion Air control is one of the most critical elements for proper Solid Fuel combustion. Efficient solid fuel combustion depends on both, primary (combustion) and secondary (over fire) air. Combustion Air provides the basic oxygen supply for solid fuel burning. Secondary Air is injected into the upper section of the combustion chamber to combust the unburned gases.
The stoker base is divided into zones (under grate wind boxes) from front to back. The purpose of the wind boxes is to deliver the primary (combustion) air for solid fuel burning. The combustion air is delivered through attached plenum by a direct drive combustion air fan driven by Variable Speed Drive (VSD). The main plenum branches off to the individual wind boxes and is equipped with hand-operated dampers. Hand-operated dampers are provided to regulate the flow of air to the zones to compensate for irregularity in the fuel bed depth. The total supply of combustion air delivered is modulated using VSD and is directly proportional to the amount of fuel delivered to the Combustion Chamber.
The amount of theoretical combustion air required is carefully calculated for each individual Solid Fuel used. Since the majority of the combustion occurs directly above the stoker grate, the injection of secondary air assures proper oxygen mixing and complete combustion of carbon monoxide and volatile gases. The secondary air is injected to the combustion chamber (above the grate) using a high-pressure blower.
Combustion Air
In order to achieve a complete combustion of all combustible components of Solid Fuel with all the Oxygen, sufficient space, Time, Turbulence and Temperature high enough to ignite the components must be provided.
Combustion Air control is one of the most critical elements for proper Solid Fuel combustion. Efficient solid fuel combustion depends on both, primary (combustion) and secondary (over fire) air. Combustion Air provides the basic oxygen supply for solid fuel burning. Secondary Air is injected into the upper section of the combustion chamber to combust the unburned gases.
The stoker base is divided into zones (under grate wind boxes) from front to back. The purpose of the wind boxes is to deliver the primary (combustion) air for solid fuel burning. The combustion air is delivered through attached plenum by a direct drive combustion air fan driven by Variable Speed Drive (VSD). The main plenum branches off to the individual wind boxes and is equipped with hand-operated dampers. Hand-operated dampers are provided to regulate the flow of air to the zones to compensate for irregularity in the fuel bed depth. The total supply of combustion air delivered is modulated using VSD and is directly proportional to the amount of fuel delivered to the Combustion Chamber.
The amount of theoretical combustion air required is carefully calculated for each individual Solid Fuel used. Since the majority of the combustion occurs directly above the stoker grate, the injection of secondary air assures proper oxygen mixing and complete combustion of carbon monoxide and volatile gases. The secondary air is injected to the combustion chamber (above the grate) using a high-pressure blower.