Wood Fuel Additive
A fireside additive for boilers and furnaces firing wood chips, sawdust, bark, pellets, briquettes and mixed wood residues.
Fuel-specific fireside treatment for industrial boilers.
Wood fuels may include bark, chips, sawdust, shavings, pellets and briquettes. Moisture, resin, bark content and particle size affect ignition and burnout. Inconsistent firing can produce smoke, soot, carbon-rich ash and deposits. AGN6300 is formulated to support more stable combustion and cleaner heat-transfer zones when correctly dosed and monitored.
The product is a free-flowing powder intended for controlled addition with the fuel. It works as part of a properly managed combustion programme that also considers fuel quality, air distribution, furnace loading, draft, grate condition, soot blowing and boiler operating discipline.
Why this fuel needs systematic fireside management.
Boiler performance is influenced by fuel chemistry, moisture, ash, particle size, air supply, residence time and the cleanliness of heat-transfer surfaces.
Incomplete combustion and unburnt carbon
When fuel particles do not receive sufficient oxygen, mixing, temperature or residence time, part of the carbon may leave the furnace as carbon monoxide, smoke, soot or unburnt material in ash. This represents lost fuel value and can also contribute to deposit growth.
Slag, clinker and fouling
Ash components may soften, melt or react at furnace temperatures. Sticky particles can attach to furnace walls, superheater areas or tube banks. Carbon may become trapped inside these layers and form hard clinker. Deposits restrict gas flow, alter heat transfer and increase cleaning effort.
Corrosion and acid-related deposits
Sulphur-bearing fuels can generate sulphur oxides. In colder boiler sections, moisture and sulphur trioxide may contribute to acidic condensation and ash bonding. Deposit control, temperature management and suitable treatment are therefore important in protecting availability.
Why a fuel-specific additive is useful
Agnisol is formulated to support carbon burnout, reduce the tendency of deposits to sinter into hard masses and help keep deposits more friable and removable. It should be used consistently and evaluated through operating data rather than judged from a single shift.
Where AGN6300 can be applied.
Steam boilers
For plants where fuel is used to generate process steam and deposit formation or variable combustion affects steam-to-fuel performance.
Thermic-fluid heaters
For solid-fuel heaters where clean heat-transfer surfaces and consistent furnace conditions are important for outlet-temperature control.
Process furnaces
For direct or indirect process heating where soot, slag, clinker or variable flame conditions reduce availability.
High-load operation
Useful during periods of higher boiler loading when fuel throughput, ash generation and deposit formation increase.
Variable fuel quality
Supports operational consistency when moisture, ash, size or fuel source changes across deliveries or seasons.
Maintenance improvement programmes
Can be included in programmes aimed at extending cleaning intervals, improving deposit removability and reducing unscheduled stoppages.
Detailed operating benefits to evaluate.
Actual results depend on fuel quality, boiler design, baseline condition, dosage consistency and operating practices.
- Supports more complete combustion of solid fuel
- Helps reduce unburnt carbon in ash
- Can reduce visible smoke and soot when combustion improves
- Helps reduce the tendency of hard slag and clinker formation
- Supports softer and more removable deposits
- Helps keep furnace and heat-transfer surfaces cleaner
- Can support improved steam generation for the same firing conditions
- May help reduce stack temperature when heat recovery improves
- Supports longer operating periods between cleaning shutdowns
- Can reduce manual effort required for clinker removal
- Helps control particulate carryover associated with poor combustion
- Supports better fuel economy after correct optimisation
- Can assist in maintaining more stable furnace temperature
- Supports boiler availability and operational consistency
Consistent distribution is essential.
Automatic fuel charging
Where a screw feeder or mechanical fuel-handling system is available, the additive should be blended or metered so that it enters the furnace uniformly with the fuel. Uniform addition is preferable to occasional heavy dosing because deposit conditioning and combustion support depend on continuity.
Manual fuel charging
For manually fired systems, the additive may be introduced through the fire door or inspection opening. It should be spread across the widest practical fuel-bed area rather than concentrated at one point. Site safety procedures, personal protective equipment and boiler operating instructions must be followed.
Starting and optimisation
The existing Agnisol guidance describes an initial commissioning dosage followed by adjustment based on smoke, ash, deposit condition and boiler response. Regular dosage is then optimised for the individual fuel and boiler. Technical advice should be obtained before fixing a permanent dose.
Factors that affect dosage
Fuel ash, sulphur, moisture, calorific value, particle size, boiler loading, grate design, furnace temperature, residence time and existing deposit thickness all influence the required treatment level.
Measure the result over two to four weeks.
Trend data is more reliable than visual impressions alone.
Fuel consumption
Compare fuel used per tonne of steam or per unit of useful heat.
Steam generation
Track steam output, pressure stability and evaporation ratio.
Unburnt carbon
Compare ash carbon or loss-on-ignition values before and after treatment.
Stack temperature
Observe whether improved surface cleanliness supports better heat recovery.
Furnace condition
Record clinker hardness, deposit thickness and cleaning frequency.
Smoke and emissions
Track visible smoke, CO, particulate matter and oxygen where instruments are available.
Draft and pressure
Monitor furnace draft and pressure drop across gas passages.
Maintenance hours
Record manpower, cleaning time and forced-shutdown frequency.
Boiler availability
Compare operating days and stoppages between cleaning cycles.
| Parameter | Unfavourable trend | Desired trend after optimisation |
|---|---|---|
| Unburnt carbon in ash | Increasing or consistently high | Decreasing |
| Slag and clinker deposits | Harder or faster formation | Softer, less adherent and reduced |
| Stack temperature | Increasing due to fouling | Stable or decreasing as heat transfer improves |
| Fuel-to-steam ratio | More fuel per tonne of steam | Reduced after stable optimisation |
| Smoke / CO | Persistent incomplete combustion | Reduced with improved combustion control |
Frequently asked questions.
Can the additive correct poor air distribution?
No. Air distribution, draft, fuel-bed depth and feeder condition must be corrected independently. The additive supports combustion and deposit management but cannot replace mechanical or operating corrections.
Can the product remove existing deposits?
Regular treatment may help weaken and condition some existing deposits over time, but heavily sintered deposits may still require mechanical cleaning during shutdown.
Does every boiler use the same dosage?
No. The optimum dosage depends on fuel chemistry, boiler design, loading and deposit condition. Start-up and regular dosing should be reviewed with technical support.
How should success be evaluated?
Use fuel-to-steam ratio, ash carbon, stack temperature, deposit condition, smoke, maintenance time and boiler availability. Compare consistent operating periods rather than isolated readings.