SU1507580A1 - Apparatus for distilling solvent from polymer crumbs - Google Patents

Abstract

The invention relates to chemical engineering and is aimed at improving the design of degassers for the separation of polymeric materials, such as synthetic rubbers, from hydrocarbon solutions into the aqueous phase. The purpose of the invention is to increase the efficiency of the apparatus. For this, the hollow rotation bodies are interconnected by means of axial cylindrical shells. The steam connections are connected to the axial cylindrical shells tangentially. With the passage of the entire apparatus, the bubbling-vortex flow regime is preserved in it. It provides a reduction in volumetric gas content and an intensive removal of solvent vapors from the crumb. 3 il.

Description

The invention relates to chemical mapping and is aimed at improving the design of degassers for the separation of polymeric materials, such as synthetic rubbers, from hydrocarbon solutions into the aqueous phase.

The purpose of the invention is to increase the efficiency of the apparatus.

Figure 1 shows the apparatus, a general view; Fig. 2 shows an embodiment of the apparatus; on fig.Z - node I in figure 2.

The apparatus 1 is made of hollow spherical sections a, nozzles 2-4 for steam supply, removal of pulp and gas-vapor mixture, respectively. The crusher 5 is connected by a nozzle 6 to the body of the apparatus 1. A centrifugal separator 7 is installed in the upper part of the apparatus, connected to the nozzle 3 for the removal of pulp

and pipe 4 outlet vapor-gas mixture.

The lower spherical section of the apparatus is equipped with a coaxially mounted shell 8 with a bottom 9 in which there is a nozzle 10 for draining the apparatus. The papal spherical sections a are interconnected by means of axial cylindrical shells 11. The nozzles 2 for supplying steam are connected to the shells 11 tangentially.

The separator 7 according to FIG. 3 is a central nozzle S, on the periphery of which there are inclined vanes 12 (twisting flow), which are placed in the retractile cone 13, the narrow part of which is connected to the nozzle 3 of the separated pulp from the apparatus.

(L

with

SP

ABOUT

The device works as follows.

The polymer solution is fed to a crusting generator 5. Hot water and water vapor are also fed there. The resulting mixture of solvent vapors, water vapor, water, and polymer particles is fed tangentially into the lower body of the apparatus, where a central gas vortex is formed under the action of centrifugal forces, surrounded by a rotating iodine layer with crumb. In the lower spherical section a, the vortex flow pattern is maintained, although the energy of the central gas vortex decreases and already at the exit from the lower body there is a tendency for it to decay. In the lower spherical section a, there is an intensive removal of the solvent from the crumb, which in the form of gas puffs is entrained in the central gas vortex.

When passing through a cylindrical shell 11 connecting two adjacent spherical sections a, the flow is additionally swirled with hot water or steam, at the same time introducing the necessary heat to further remove the organic solvent from the polymer crumb.

Thus, with the passage of the entire apparatus, the bubbling-vortex flow regime is preserved in it, which ensures a decrease in the bulk gas content of 1.7-2.0 times and an intensive removal of leached solvent vapor from the crumb.

At the entrance to the last spherical section a the bubbling-vortex flow regime degenerates into a pure barbotage one. Three-phase mixture enters the centrifugal separator 7, where the separation of the vapor-gas mixture from the aqueous pulp. The latter is removed from the apparatus through nozzle 3 for further processing, and the vapor-gas mixture is directed to condensation and separation through nozzle 4 o

Claims (1)

Invention Formula A solvent stripper | FROM polymer chips containing a vertical body formed by sections in the form of hollow bodies of revolution, with connections for steam supply and removal of slurry and gas-vapor mixture, a crushing agent connected by a pipe to the case, a centrifugal separator connected to the pipe for removal of the gas-vapor mixture, characterized in that, in order to increase the efficiency of the apparatus, the hollow bodies of rotation are interconnected by means of axial cylindrical shells, and the pipes for the supply of steam are connected to the axi cylindrical shells are tangential. (fue. /  12 S 13 FiaZ