industrial sump pump operation

Seawater flue gas desulphurization

Seawater FGD (Flue Gas Desulphurization)

ANDRITZ offers seawater flue gas desulphurization with low operating and maintenance cost for coastal regions.

Ideal solution for coastal plant

ANDRITZ´s seawater FGD system is able to work without additional absorbent, and there are no by-products or waste created that need further treatment or disposal. Raw flue gas enters the scrubber and is cleaned in counter-current by seawater. The principle applied here is similar to the limestone process. Depending on the application ANDRITZ offers an FGD scrubber based on the well proven open spray tower technology, combined with an FGDplus system. In addition, ANDRITZ also has experience with a packed tower design for seawater FGD systems. These systems are beneficial in optimizing the plant’s footprint and efficiency at high SO2 inlet concentrations.

Wise principle

The principle of our process is to make use of the natural alkalinity of seawater instead of using limestone solution to absorb acidic substances in the flue gas. The SO2 is first converted into sulphite. Then the sulphite is oxidated to form sulphate in the CFD-optimized aeration basin in order to maintain the pH, raise the DO (dissolved oxygen), and reduce the COD (Chemical Oxygen Demand). In the meantime, CO2 formed by the neutralization reaction is stripped by aeration membranes, and the pH value is increased consequently to meet legal requirements.

Key features

Outstanding for various fuels (lignite, hard coal, oil, and biomass) Up to 99% SO2 removal No by-products Seawater as absorbent Open spray tower technology and packed tower design Low operating and maintenance costs High availability Options for materials of construction (high-alloy carbon steel with rubber lining, concrete with PP-lining, glass fiber reinforced plastics)

Wet flue gas cleaning systems

ANDRITZ provides novel scrubber system (FGDplus) that maximizes SO2 and dust removal while keeping energy inputs to a minimum.

DeNOx systems - Selective Catalytic Reduction (SCR)

Technology for power stations, Energy-from-Waste plants, and industrial plants

Combined/multi-stage flue gas cleaning systems

Our complete product portfolio allows us to comply with the most difficult requirements through the intelligent combination of our processes and technologies especially for Waste-to-Energy plants or other industrial applications.

Service, retrofit and modernization

Clean Air Technologies – Clean environment for a better tomorrow

Power generation

Reliable, efficient power generation from traditional and renewable fuels