Method Of Moistening Paper Web And Paper Web Moistening Device

Abstract

A paper web moistening device comprises several moistening nozzles ( 2 ) in the cross direction of a paper web for blowing water mist comprising air and water onto the paper web ( 3 ) surface. At least one means for removing water 5 mist and/or air from the vicinity of the paper web ( 3 ) surface is arranged be-tween the moistening nozzles. This means is arranged closer to the paper web ( 3 ) surface than the moistening nozzles ( 2 ).

1 . A method of moistening a paper web comprising spraying water mist onto the paper web surface by a moistening device and removing excess water mist and/or air closer to the paper web surface than where the spraying of water mist occurs.  
   
   
       2 . A method according to  claim 1 , wherein water mist and/or air are/is removed by a discharge nozzle.  
   
   
       3 . A method according to  claim 1 , wherein air is blown before the moistening device in the direction opposite to the machine direction of the paper web.  
   
   
       4 . A method according to  claim 1 , wherein air is blown from the nip side of the moistening device in the direction opposite to the machine direction of the paper web.  
   
   
       5 . A paper web moistening device comprising a body, moistening nozzles and at least one means that extends closer to the paper web surface than the moistening nozzles for removing water mist and/or air from the vicinity of the paper web surface.  
   
   
       6 . A paper web moistening device according to  claim 5 , wherein moistening nozzles are arranged in at least two different positions in the machine direction of the paper web and that the means for removing water mist and/or air from the vicinity of the paper web surface is arranged in a position between the moistening nozzles.  
   
   
       7 . A paper web moistening device according to  claim 6 , wherein the moistening nozzles are arranged in at least two rows in the moistening device and that the means for removing water mist and/or air from the vicinity of the paper web surface is arranged between the rows.  
   
   
       8 . A paper web moistening device according to  claim 5  wherein the means for removing water mist and/or air from the vicinity of the paper web surface has the same width as the paper web.  
   
   
       9 . A paper web moistening device according to  claim 5 , wherein distance of the means for removing water mist and/or air from the vicinity of the paper web surface from the paper web is at least 20 mm smaller than the distance of the moistening nozzles from the paper web.  
   
   
       10 . A paper web moistening device according to  claim 5 , wherein the distance of the means for removing water mist and/or air from the vicinity of the paper web surface from the paper web is at least 50 mm smaller than the distance of the moistening nozzles from the paper web  
   
   
       11 . A paper web moistening device according to  claim 5 , further comprising a slit nozzle arranged in the front section of the moistening device for blowing air against the machine direction of the paper web.  
   
   
       12 . A paper web moistening device according to  claim 5 , further comprising a slit nozzle arranged in its nip side for blowing air against the machine direction of the paper web.  
   
   
       13 . A paper web moistening device according to  claim 5 , further comprising at least one water discharge outlet.  
   
   
       14 . A paper web moistening device according to  claim 5 , wherein the means for removing water mist and/or air from the vicinity of the paper web surface is a discharge nozzle.  
   
   
       15 . A paper web moistening device according to  claim 5 , wherein the moistening device is arranged in connection with a multi-roll calender.  
   
   
       16 . A paper web moistening device according to  claim 5 , wherein the moistening device is arranged in connection with a multi-roll calender having two stacks of rolls.