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Environmental Engineering
Much of the capital expenditure in building modern power plants goes into environmental engineering in the form of dust collection, desulphurization and denitrification. It must be remembered that flue gases form from the firing of coal and contain ash particles, nitrogen oxides and sulphur dioxides. These emissions can be largely reduced by using highly effective processes. Modern technology can, for example, precipitate 99.9% of dusts from the flue gas; other processes ensure that the remaining constituents only give rise to minor emissions.
This is illustrated by ash particles which adhere to electrically charged plates in the electrostatic precipitator before being rapped and removed from the flue gas.
Nitrogen oxides react with ammonia and with the help of catalysts are transformed in the DeNOx system into nitrogen and water vapor, which are natural constituents of the air we breathe.
Sulphur dioxide can be filtered out in the flue gas desulphurization equipment. In so doing, lime of milk binds the sulphur dioxide in the flue gas with pure gypsum arising as the final product.
Hitachi Power Europe has both extensive know-how and a lengthy track record in environmental engineering. Both our company and parent company Hitachi, Ltd. are constantly researching into new processes to raise plant efficiencies.
For more information please contact sales@hitachi-power.co.za