Cleaning the biomass boiler economizer
Bran build-up inside the silo
9 December 2022
Clogging of fly ash in incineration
9 December 2022PROBLEM:
– Treated material: fumes
– Manufacturer Biomass Boiler: LEROUX & LOTZ
– Boiler power: 48.5 MW
– Fuel: Biomass 150,000 tons/year => 69m³ of biomass/hour
- Forestry pellets
- Forestry shreds
- Related sawmill products
– Manufacturer Economizer: FAVIER SETREM
– Gas temperature at the economizers: 350°C
– Sale of 2 Energies: Electricity: 102 GWh/year & Heat (as steam) 153 GWh/year
The customer has problems with the clogging of the tubes of these 2 economizers (eco 1.1 + eco 1.2).
This reduces the passage of smoke that must be treated for the use of the biomass boiler.
IDEX used to use chimney sweeps on its boiler. But these chimney sweeps are not efficient enough and are expensive to maintain.
SOLUTION :
4 AIRCHOC® AC520HFP air cannons were installed on the first row of tubes on economizer 1.
The choice of a 200-liter tank allows for a large volume of air to sweep all the installed tubes.
The customer has adapted the firing frequency of 1 air cannon every 15 minutes.
RESULT:
IDEX is satisfied with the result because the fumes gas treatment circuit is clean, and the boiler can produce normally.
Moreover, by changing the cleaning solution, he saves on his maintenance.