Exhaust gas treating tower

Abstract

Provided is an exhaust gas treating tower in which exhaust gas flow velocity is increased more than a prior art case so that exhaust gas treating efficiency can be enhanced or the exhaust gas treating tower can be made compact if equivalent performance is to be maintained. Also, an exhaust gas treating tower ensuring a liquid recovery is provided. In an exhaust gas treating tower 10 A, liquid columns C are generated and also a liquid drop generating member 20 is provided to thereby generate liquid drops M therearound to be floated. Also, liquid is spouted from spray nozzles to thereby generate liquid films F in area different from the liquid columns C. In an exhaust gas treating tower 110, a liquid drop eliminator 120 is provided upstream of a mist eliminator 118. Interval P 1 of collecting plates 121 of the liquid drop eliminator 120 is made larger than interval P 2 of collecting plates 119 of the mist eliminator 118. Thereby, liquid drops having larger particle diameter contained in the exhaust gas are collected by the liquid drop eliminator 120.

1 . An exhaust gas treating tower comprising a tower body in which exhaust gas introduced from below is discharged outside from above, wherein said exhaust gas treating tower comprises a first substance removing portion that generates liquid columns in said tower body by spouting liquid upward from below in a column shape so that, by said exhaust gas making contact with said liquid columns, a substance contained in said exhaust gas is removed and a second substance removing portion that is provided in an area different from said liquid columns generated in said first substance removing portion so that, by said exhaust gas making contact with the liquid, the substance contained in said exhaust gas is removed.  
   
   
       2 . An exhaust gas treating tower as claimed in  claim 1 , wherein an inlet port of said exhaust gas is provided in a side wall of said tower body below both of said first and second substance removing portions.  
   
   
       3 . An exhaust gas treating tower as claimed in  claim 1 , wherein a plurality of nozzles that generate liquid films by spouting the liquid in an umbrella shape are provided as said second substance removing portion and said nozzles are arranged such that said liquid films generated by said nozzles lap on said liquid films generated by adjacent ones of said nozzles so that-no gap is generated therebetween.  
   
   
       4 . An exhaust gas treating tower as claimed in  claim 3 , wherein said nozzles are provided in a piping that supplies the liquid for generating said liquid columns in said first substance removing portion.  
   
   
       5 . An exhaust gas treating tower as claimed in  claim 3 , wherein there is further provided a pump for pressurizing the liquid to be spouted from said nozzles.  
   
   
       6 . An exhaust gas treating tower as claimed in  claim 3 , wherein a collision member with which the liquid falling down from said liquid columns generated in said first substance removing portion or said liquid films generated by said nozzles collides so that liquid drops are generated is provided as said second substance removing portion.  
   
   
       7 . An exhaust gas treating tower as claimed in  claim 6 , wherein said collision member comprises a wall surface extending in an upward and downward direction of said tower body so that the liquid drops generated by said collision member are retained in the vicinity of said wall surface by friction force with said wall surface.  
   
   
       8 . An exhaust gas treating tower comprising a tower body in which exhaust gas introduced from below is discharged outside from above, wherein said exhaust gas treating tower comprises: 
 a liquid supply portion that supplies liquid into said tower body so that, by said exhaust gas making contact with the liquid, a substance contained in said exhaust gas is removed,    a first liquid drop collecting portion provided on a downstream side of said liquid supply portion in a flow direction of said exhaust gas so as to collect the liquid drops contained in said exhaust gas that has made contact with the liquid, and    a second liquid drop collecting portion provided on the downstream side of said liquid supply portion in the flow direction of said exhaust gas and on an upstream side of said first liquid drop collecting portion so as to collect the liquid drops larger than the liquid drops to be collected by said first liquid drop collecting portion out of the liquid drops contained in said exhaust gas.    
   
   
       9 . An exhaust gas treating tower as claimed in  claim 8 , wherein said liquid supply portion generates liquid columns by spouting the liquid upward from below in a column shape so that said exhaust gas makes contact with said liquid columns.  
   
   
       10 . An exhaust gas treating tower as claimed in  claim 8 , wherein said first liquid drop collecting portion comprises a plurality of first collecting plates arranged inclinedly relative to the flow direction of said exhaust gas with a predetermined pitch being maintained between each of said first collecting plates and said second liquid drop collecting portion comprises a plurality of second collecting plates arranged inclinedly relative to the flow direction of said exhaust gas with a predetermined pitch, larger than the pitch of said first collecting plates, being maintained between each of said second collecting plates.  
   
   
       11 . An exhaust gas treating tower as claimed in  claim 10 , wherein the pitch of said second collecting plates is set based on a flow velocity of said exhaust gas at a usual operation time in said tower body.  
   
   
       12 . An exhaust gas treating tower as claimed in  claim 10 , wherein the pitch of said second collecting plates is set based on a maximum flow velocity of said exhaust gas in said tower body.