Apparatus and method for evaporating waste water and reducing acid gas emissions
AssigneeGeneral Electric Technology GmbH
InventorsRaymond Raulfs GANSLEY, Jurgen DOPATKA, Sanjay Kumar DUBE, Philip C. RADER
Life of this patent
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Abstract
An apparatus for evaporating waste water and reducing flue gas acid gas emissions includes an evaporator device configured to receive a portion of flue gas emitted from a combustion unit and waste water for direct contact of the flue gas with the waste water to cool and humidify the flue gas, and to evaporate the waste water. An alkaline reagent as well as activated carbon may be mixed with the waste water prior to waste water contact with the flue gas. Solid particulates that are dried and entrained within the cooled and humidified flue gas can be separated from the flue gas via a particulate collector.
Claims15
A method for evaporating waste water and reducing acid gas emissions in a combustion flue gas, comprising:
- supplying waste water to a heat exchanger for heating of the waste water to produce heated waste water;
- evaporating the heated waste water in a flash vessel collecting remaining waste water in the flash vessel;
- supplying the remaining waste water to an evaporator device arranged with a flow of the flue gas through the evaporator device for evaporation of the remaining waste water in the evaporator device;
- and
- supplying the flue gas to a wet flue gas desulfurization system for absorption of acid gas from the flue gas to produce treated flue gas for release to the environment.
A system for evaporating waste water and reducing acid gas emissions from a combustion flue gas, comprising:
- a wet flue gas desulfurization system for absorption of acid gas from the flue gas thereby producing waste water and producing treated flue gas for release to the environment;
- a heat exchanger supplied waste water for heating of the supplied waste water to produce heated waste water;
- a flash vessel for evaporation of the heated waste water and for collection of remaining waste water in the flash vessel;
- and
- an evaporation device upstream of the wet flue gas desulfurization system for evaporation of the remaining waste water in a flow of the flue gas flowing through the evaporator device.
Dependencies are inferred from the claim text.