Effect of primary air maldistribution due to nozzle wear on CFBC performance

The method of nozzle grid field measurements combined with detailed flow and combustion computations provides the CFBC operator with information on required number of nozzles to be changed in order to ensure uniform air distribution and at the nozzle grid. As a prerequisite for burn-out quality, boiler efficiency and emission control, the nozzle grid assessment is an effective measure to reduce boiler maintenance costs.