An ineffective boiler operation reduces the waste throughput, and reduces the efficiency of the flue gas cleaning.
Typical causes for an ineffective boiler operation
The boiler operation’s ineffectiveness can be caused by residues (fouling) accumulating at the surface of the boiler, creating an isolation lining and having a double consequence: a lesser steam/energy production, and an unwanted increased temperature in the boiler.
By increased public legislation demands, it is very important that the plant have a good control over its CO and NOx emissions.
A direct positive consequence of reducing CO and NOx levels it is very often resulting in a much more efficient operating WtE combustion plant.
High CO emissions are typically caused by:
- A too low temperature in the furnace
- A lack of sufficient Oxygen in parts the combustion process
- lack of a good mixing of the secondary air into the combustion gasses
- periods with very high heat values in the waste
High NOx emissions are caused by:
- Too high oxygen level in the combustion process
- Bad combustion control
- Difficult waste qualities including high amount of Nitrogen
Dublix offers the following products/services to solve this problem:
- FuzEvent high-level control system for better control of Oxygen in the combustion process
- Combustion system upgrades creating a more homogeneous combustion on the grate surface
- Improved secondary mixing air injection systems
The achieved results are:
- A better combustion control, reducing the emission levels of CO with 30-50 % and NOx with 10-20 %
- Better exess air control increasing boiler efficiency
- 10% increased efficiency of the overall plant
- nearly 100 % fully controlled plant 24 hour/day without need for operator interaction.