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US 2017/0282111 A1Published application
Apparatus and method for treatment of exhaust gas
AssigneeKeppel Offshore & Marine Technology Centre Pte Ltd
InventorsMing LIU, Nirmal RAMAN GURUNTHALINGAM, Kok Seng FOO, John David YOUNG
Life of this patent
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Abstract
The present disclosure relates to an apparatus and method of removing pollutants from exhaust gas by wet scrubbing process. In a scrubber apparatus of the present disclosure, an exhaust gas is first scrubbed in a primary mixing zone, the partially scrubbed gas discharged from the primary mixing zone is subsequently mixed forcibly in a secondary mixing zone before being discharged for polishing, demisting and/or reheating.
Claims11
A scrubber apparatus comprising:
- a venturi section to receive an exhaust gas;
- at least a primary spray header to inject a primary wash liquid into the venturi section;
- a downcomer disposed downstream of the venturi section and fluidly coupled to the constriction of the venturi;
- a primary collection tank disposed downstream of the downcomer to retain the primary wash liquid and a partially scrubbed gas discharged from the downcomer;
- a plurality of secondary mixing throats arranged at an inclination to the vertical direction, each of the secondary mixing throats is provided with a secondary spray header adapted to inject into the each secondary mixing throat a high pressure secondary wash liquid which is to cause the partially scrubbed gas to be drawn into the each secondary mixing throat to mix with the secondary wash liquid, wherein the resulting gas is to be discharged from the each secondary mixing throat as a vortical gas flow which is to be fed into a polishing section having a plurality of polishing spray headers to polish the vortical gas flow;
- and
- a demister disposed to remove entrained wash liquid mist from a polished gas discharged from the polishing section.
4 more elements
A method of scrubbing exhaust gas, the method comprising:
- passing an exhaust gas into a venturi section;
- mixing a primary wash liquid with the exhaust gas in the venturi section and in a downcomer which is fluidly coupled thereto;
- discharging a partially scrubbed gas from the downcomer into a primary collection tank;
- creating a vortical gas flow from the partially scrubbed gas by injecting a high pressure secondary wash liquid through a plurality of secondary mixing throats, which are arranged at an inclination to the vertical direction, to forcibly draw the partially scrubbed gas from the primary collection tank into a polishing section;
- polishing the vortical gas flow to remove residual pollutants therefrom;
- and
- removing entrained wash liquid mist from the polished gas.
4 more elements
Dependencies are inferred from the claim text.