Solutions for Low Output of Biomass Grate Furnaces: Combustion System Adjustment, Air Volume Ratio Optimization

When a biomass grate furnace falls short on output, the combustion system and air distribution are usually the first things to check. Dampers, fans, air boxes and air ducts can be adjusted without changing the grate structure, so it makes sense to start there.

Damper and fan commissioning

Damper and fan commissioning confirms whether primary air distribution matches the state of the fuel bed. Check each fan’s operating status one by one, then adjust damper opening zone by zone. Zoned air supply directly determines whether oxygen reaches the fuel bed evenly.

Clearing ash from the air box

Clear ash from the air box so that air reaches every zone evenly. Ash buildup changes the actual air volume of each zone, so recheck damper openings after cleaning to get a more accurate judgement.

Checking air-duct resistance

Check whether ash buildup at duct bends has raised resistance, and optimise duct diameter and routing where necessary. Confirm the ash situation at the bends before altering the duct, so that you do not change the pipe size while leaving the source of the ash in place.

Spare parts

We supply chain grates and replacement parts such as grate bars, cross beams and connecting pins, produced at the partner factory and shipped from there. We can provide selection and spare-part matching, and arrange the parts together when an air-system adjustment calls for replacements.