APPARATUS AND METHOD FOR EVAPORATING WASTE WATER AND REDUCING ACID GAS EMISSIONS

摘要

An apparatus for evaporating waste water and reducing gas emissions includes an evaporator device configured to receiving a portion of flue gas emitted from a boiler unit and waste water to directly contact the flue gas with the waste water to cool and humidify the flue gas and to dry solid particulates within the waste water. In some embodiments, the waste water may be a component of a mixture formed by a mixer device prior to being contacted with the flue gas to humidify and cool the flue gas and dry solids within the waste water. An alkaline reagent as well as activated carbon can be mixed with the waste water prior to the waste water contacting the flue gas. Solid particulates that are dried within the cooled and humidified flue gas can be separated from the flue gas via a particulate collector.

主权项

1. A method for evaporating waste water and reducing acid gas emissions, comprising:
adding an alkaline reagent to a waste water to produce alkaline waste water; transporting a first portion of a flue gas emitted by a combustion unit to an evaporator device such that the first portion of the flue gas bypasses a pre-heater and is contacted by the alkaline waste water to evaporate the alkaline waste water, to reduce acid gas emissions, to produce a cooled and humidified first portion of the flue gas, and to produce dry solid particulates; separating the dry solid particulates using a particulate collector to obtain separated dry particulates; transporting a second portion of the flue gas emitted by the combustion unit to the pre-heater to heat a fluid in the preheater to produce a heated fluid supplied to the combustion unit; and merging the cooled and humidified first portion of the flue gas with the second portion of the flue gas, after the second portion of the flue gas has passed through the pre-heater, to produce a merged flue gas.