Download - Hitachi Power Europe GmbH

A Clean Aspect
Whether it is a matter of coal dust collection, desulphurization or denitrification, much
of the capital expenditure in building modern power plants goes into environmental
engineering. After all, flue gases containing ash particles, nitrogen oxides and sulphur
dioxides form during coal combustion. Highly effective processes can cut back these
emissions to the greatest possible extent. Modern technology is responsible, for
instance, for 99.9 % of the dusts being discharged from the flue gas. Other processes
ensure that few emissions arise from the other constituents:
Air Quality Control Systems
and Components
More information
in our brochure
Ash particles adhere to electrically-charged plates in the electrostatic precipitator;
they are rapped and removed from the flue gas.
Nitrogen oxides (NO x ) react with ammonia and with the aid of catalysts are
converted in the DeNO x system to nitrogen and water vapor – the natural
constituents, in fact, of air.
Sulphur dioxide can be filtered out in the flue gas desulphurization system (FGD).
Lime slurry binds it in the flue gas and the final product is pure gypsum.
Hitachi Power Europe has extensive knowledge available and a long track record in flue
gas cleaning. The company can deliver the components turnkey, if needed. In addition,
HPE and parent company Hitachi, Ltd. are constantly researching into new processes
to raise flue gas cleaning system efficiencies.
The FGD filters sulphur
dioxide out of the flue gas
30