Reactor

Abstract

A polymerization device that includes: a reaction vessel that houses a polymerization solution and in which a polymerization reaction is performed; a stirring blade that stirs the polymerization solution housed in the reaction vessel; a plurality of heat transfer pipes that transfer heat to the polymerization solution in order to start the polymerization reaction and cause the polymerization reaction to proceed, and that remove, from the polymerization solution, heat generated by the polymerization reaction; and a baffle arranged between a vessel wall of the reaction vessel and the heat transfer pipes.

1 . A reactor comprising:
 a reaction vessel that houses a polymerization solution and in which a polymerization reaction is performed;   a stirring blade configured to stir the polymerization solution housed in the reaction vessel;   a plurality of heat transfer pipes configured to transfer heat to the polymerization solution in order to start the polymerization reaction and cause the polymerization reaction to proceed, and to remove, from the polymerization solution, heat generated by the polymerization reaction; and   a baffle arranged between a vessel wall of the reaction vessel and the heat transfer pipes; wherein   the plurality of heat transfer pipes are arranged in a circumferential shape around the stirring blade, include heat transfer pipes whose lower ends are arranged in a position higher than a bottom face of the reaction vessel, and restrict an amount of the polymerization solution circulated from an inner side to a vessel wall side of the reaction vessel, at a depth at which the heat transfer pipes are arranged, and   the baffle changes a flow direction of the polymerization solution that has flowed between the vessel wall of the reaction vessel and the heat transfer pipes arranged in the circumferential shape, and generates a flow of the polymerization solution to an inward direction of the reaction vessel.   
     
     
         2 . The reactor according to  claim 1 , wherein
 a plurality of the baffles are arranged so as to protrude from the vessel wall of the reaction vessel in the inward direction of the reaction vessel, and change the flow direction of the polymerization solution that rises while revolving along the vessel wall of the reaction vessel.   
     
     
         3 . The reactor according to  claim 1 , wherein
 the baffle is arranged at a position such that a length of a section immersed in the polymerization solution is from 10% to 50% of a liquid level.   
     
     
         4 . The reactor according to  claim 1 , wherein
 the baffle is arranged in a position at which an upper end thereof is higher than a position of a liquid surface and a lower end thereof is at a position lower than a position of the liquid surface.   
     
     
         5 . The reactor according to  claim 1 , wherein
 upper ends of the plurality of heat transfer pipes are positioned more to a bottom face side than a position of the liquid surface.   
     
     
         6 . The reactor according to  claim 1 , wherein
 a distance between lower ends of the plurality of heat transfer pipes and the bottom face of the reaction vessel is longer than a distance between the plurality of heat transfer pipes and the vessel wall of the reaction vessel.   
     
     
         7 . The reactor according to  claim 1 , wherein
 the plurality of heat transfer pipes have a hairpin coil shape in which ends of two pipes that are arranged in a vertical direction are coupled together.   
     
     
         8 . The reactor according to  claim 7 , wherein
 the plurality of heat transfer pipes having the hairpin coil shape are arranged in positions in which distances and angles from a center axis of the reaction vessel to each of the two pipes are different.   
     
     
         9 . The reactor according to  claim 1 , wherein
 the polymerization solution contains one of a raw material of polyarylene sulfide and polyarylene sulfide produced from the raw material.