Paiton/Indonesia
Seawater flue gas desulphurisation
Resource conserving wet process for coastal regions
AE&E has developed a desulphurisation process similar to limestone FGD for plants located in coastal areas. The natural components of seawater are used as absorbents and are discharged back to the sea with only a minimal increase in the sulphate concentration. Not only is this process cost effective, it also results in no by-products.
Process
The process generally uses an open spray tower. Seawater from the power plant cooling circuit is used as an absorbent. The naturally dissolved bicarbonates in the seawater react with the acid components of the flue gas such as sulphur dioxide. After absorption, the sulphur dioxide is bonded in the scrubber solution and oxidised into sulphates, which are a natural component of seawater. The solution is then returned to the sea.
Innovative system
The core components of AE&E’s seawater FGD plants are the scrubber and the neutralisation/oxidation basin. Extensive experience of wet FGD systems has strongly influenced the technology. The neutralisation basin is equipped with ultramodern, highly efficient aeration membranes. The system is adapted to operating conditions using effective modern simulation software and mathematical reaction modelling.
Key features
- SO2 capture above 99%
- No additional absorbents necessary
- No auxiliaries for limestone, gypsum and waste water treatment necessary
- Low investment, operating and maintenance costs
- Minimum air and energy use
- Simple system configuration with reliable components, resulting in high availability
- Excellent environmental performance, verified by independent institutes
- Flexible part load operation