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US 2015/0086457 A1Published application
System and method for treating mercury in flue gas
AssigneeMitsubishi Hitachi Power Systems, Ltd.
InventorsSeiji Kagawa, Hideaki Sakurai, Nobuyuki Ukai, Susumu Okino, Tatsuto Nagayasu
Life of this patent
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Abstract
A system for treating mercury in flue gas is provided. The system includes a mercury adsorbent supply device to adsorb the mercury with the mercury adsorbent; a precipitator to collect the mercury adsorbent with adsorbed mercury and soot in the flue gas; a mercury adsorption assistant supply device to remove mercury remaining in the flue gas; and a desulfurization device to remove sulfur oxide (SOx) in the flue gas.
Claims3
1-8. (canceled)
A system for treating mercury in flue gas, comprising:
- a boiler that discharges flue gas containing mercury;
- a reduction-oxidation assistant supplying unit that is provided downstream of the boiler to supply a reduction-oxidation assistant;
- a denitration device that is provided downstream of the reduction-oxidation assistant supplying to denitrate nitrogen oxide (NOx) in the flue gas;
- an air heater that is provided downstream of the denitration device to adjust a temperature of the flue gas;
- a heat exchanger that is provided downstream of the air heater to lower the temperature of the flue gas;
- a mercury adsorbent supply device that is provided downstream of the heat exchanger and supplies a mercury adsorbent into the flue gas so as to adsorb the mercury with the mercury adsorbent;
- a precipitator that is provided downstream of the heat exchanger to collect the mercury adsorbent with adsorbed mercury and soot in the flue gas;
- a mercury adsorption assistant supply device that is provided downstream of the precipitator and supplies a mercury adsorption assistant into the flue gas so as to remove mercury remaining in the flue gas;
- and
- a desulfurization device that is provided downstream of the mercury adsorption assistant supply device to remove sulfur oxide (SOx) in the flue gas.
7 more elements
A method for treating mercury in flue gas comprising:
- discharging flue gas containing mercury;
- supplying a reduction-oxidation assistant;
- denitrating nitrogen oxide (NOx) in the flue gas;
- adjusting a temperature of the flue gas;
- lowering the temperature of the flue gas;
- supplying a mercury adsorbent into the flue gas so as to adsorb the mercury with the mercury adsorbent;
- collecting the mercury adsorbent with adsorbed mercury and soot in the flue gas;
- supplying a mercury adsorption assistant into the flue gas so as to remove mercury remaining in the flue gas;
- and
- removing sulfur oxide (SOx) in the flue gas.
7 more elements
Dependencies are inferred from the claim text.