The world is gradually moving away from traditional energy production such as coal and gas, and, as a result of the drive towards sustainability in recent years, waste-to-energy and biomass power plants have become a popular production method. Like their fossil-fuel colleagues, however, these plants must remove or “scrub” potentially hazardous pollutants from the flue stage of the process.
The system requirements for flue gas cleaning depend on a long list of factors. Gas cleaning of complex flue gases can be realised in many ways, either in a few or several steps. Each plant is more or less unique, and must be evaluated separately to achieve an optimal solution. Gas-cleaning systems can typically be categorised as solutions to remove:
- Particles or dust collection without the need for pumps
- The water-soluble gases SO2, HCl, HF, and NH3, performed using either wet or dry gas cleaning
- NOx (mainly NO)