Wet type scrubber for exhaust gas and method of operation

Abstract

A wet type scrubber for exhaust gas includes a wet scrubbing chamber which is disposed such that the exhaust gas introduced through an inlet flows horizontally toward an outlet and includes an overflow opening formed at a position in a side surface thereof spaced apart by a certain distance upwardly from the bottom thereof an eliminator which is disposed within the wet scrubbing chamber and installed such that the bottom thereof is positioned below the overflow opening, and includes a plurality of bent blades arranged to form a passage for the exhaust gas; an oil/water separation tank for scrubbing liquid received from the overflow opening by sequentially passing the liquid through a plurality of reservoirs, and a spray nozzle installed to spray the liquid into an inlet-side space of the wet scrubbing chamber.

1 . A wet scrubbing system comprising:
 a chamber installed with a plurality of blades defining a plurality of passages for the moisturized exhaust gas to travel therethrough, wherein the plurality of blades are configured to contact traveling moisturized exhaust gas so as to precipitate at least part of the moisturized exhaust gas into liquid, wherein the chamber is configured to hold the liquid in a bottom portion thereof; and   a liquid overflow outlet configured to let the liquid held in the bottom portion of the chamber to reach a level and begin to overflow when the liquid reached the level such that traveling of the moisturized exhaust gas under the plurality of blades is substantially inhibited when the liquid reached the level.   
   
   
       2 . The system of  claim 1 , further comprising liquid in the bottom portion of the chamber, wherein the liquid is approximately at the level. 
   
   
       3 . The system of  claim 2 , wherein each blade comprises a top end and a bottom end, wherein the level is higher than the bottom end. 
   
   
       4 . The system of  claim 2 , wherein the liquid in the bottom portion contacts at least part of the plurality of blades. 
   
   
       5 . The system of  claim 1 , wherein substantially all the moisturized exhaust gas is configured to travel through the plurality of passages when the liquid is at the level. 
   
   
       6 . The system of  claim 1 , further comprising a liquid drain on a bottom surface of the chamber, wherein the liquid drain is configured to drain the liquid that is under the level. 
   
   
       7 . The system of  claim 1 , further comprising a liquid sprayer configured to spray liquid particles onto a stream of exhaust gas so as to form the moisturized exhaust gas. 
   
   
       8 . The system of  claim 7 , wherein the liquid sprayer is installed within the chamber and is located upstream the plurality of blades. 
   
   
       9 . A wet scrubbing system comprising:
 a liquid sprayer configured to spray liquid particles to a stream of exhaust gas so as to form moisturized exhaust gas;   a chamber installed with a plurality of blades configured to provide a plurality of surfaces for at least part of the moisturized exhaust gas to contact thereto and to precipitate into liquid, wherein the chamber is configured to hold the liquid in a bottom portion thereof,   a liquid overflow outlet configured to let the liquid held in the bottom portion of the chamber to reach a level and begin to overflow when the liquid reached the level; and   a liquid drain on a bottom surface of the chamber, wherein the liquid drain is configured to drain the liquid that is under the level.   
   
   
       10 . The system of  claim 9 , wherein the plurality of blades defines a plurality of passages for the moisturized exhaust gas to travel therethrough, wherein traveling of the moisturized exhaust gas under the plurality of blades is substantially inhibited when the liquid reached the level. 
   
   
       11 . The system of  claim 10  wherein substantially all the moisturized exhaust gas is configured to travel through the plurality of passages when the liquid is at the level. 
   
   
       12 . The system of  claim 9 , further comprising liquid in the bottom portion of the chamber, wherein the liquid is approximately at the level. 
   
   
       13 . The system of  claim 12 , wherein each blade comprises a top end and a bottom end, wherein the level is higher than the bottom end. 
   
   
       14 . The system of  claim 12 , wherein the liquid in the bottom portion contacts at least part of the plurality of blades. 
   
   
       15 . The system of  claim 9 , wherein the liquid sprayer is installed within the chamber and is located upstream the plurality of blades. 
   
   
       16 . A wet scrubbing method comprising:
 flowing moisturized exhaust gas through a plurality of blades installed in a chamber, wherein while flowing at least part of the moisturized exhaust gas precipitates into liquid and drops to a bottom portion of the chamber; and   maintaining the liquid in the bottom portion at a level sufficient to substantially inhibit traveling of the moisturized exhaust gas under the plurality of blades.   
   
   
       17 . The method of  claim 16 , further comprising overflowing the liquid when the liquid reaches the level. 
   
   
       18 . The method of  claim 16 , further comprising spraying liquid particles onto a stream of exhaust gas so as to form the moisturized exhaust gas. 
   
   
       19 . The method of  claim 16 , further comprising draining the liquid such that a portion of the liquid under the level is drained. 
   
   
       20 . The method of  claim 16 , wherein the plurality of blades define a plurality of passages for the moisturized exhaust gas to travel therethrough within the chamber, wherein traveling moisturized exhaust gas contacts a surface of the blades, thereby precipitating into liquid. 
   
   
       21 . The method of  claim 20 , wherein the chamber comprises a liquid overflow outlet which allows the liquid to overflow when the liquid reaches the level.