Heat exchanger tube bundle and process for removal of solutes from a solution of polymer

摘要

Procedure for removal of dissolved substances from a polymer solution (P) with a polymer content of 50 to 95% by weight of the polymer solution, exiting directly dese a polymerization reactor through degassing a heat tube bundle (R) with a beam (5) of tube (R) arranged parallel to each other and vertical, which are fixed at both ends, respectively, on a bottom of the tube (B) and a degassing zone beneath the lower tube bottom (8), with an insert (1) in each tube (R), which narrows the cross section of free passage through the tube (R) and in which the tubes are fed (R) polymer solution (P) in the liquid phase (10) and a surrounding space around the pipes (R), which is traversed by a stream of a heat carrier, wherein the degassing it is conducted through a pressure drop between the pres ion inlet of polymer solution (P) in the heat exchanger tube bundle (R) and the degassing zone, characterized in that each insert (1) is configured such that it generates a jump pressure ( 15) between the inlet pressure and the pressure in the degassing zone, through which a residual reduced content default n substances dissolved in the degassed polymer, wherein the inserts (1) are arranged in the area is achieved upper tube bottom (B) are configured as plugs and are secured in the upper tube bottom through millings settings and screw threads or via milling (20) accurately fitting in which the plugs close the tubes (R) except a central bore for passage of the polymer solution (P), wherein the inserts (1) narrows the free cross section of passage through the pipes (R) to less than 5%.