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Device for carrying out material exchange processes

A material exchange and equipment technology, applied in the field of equipment implementing the material exchange method, can solve the problem of not mentioning the polymer solution, etc., and achieve the effect of uniform product distribution

Inactive Publication Date: 2004-03-24
BAYER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This document does not mention degassing to complete the polymer solution

Method used

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  • Device for carrying out material exchange processes
  • Device for carrying out material exchange processes
  • Device for carrying out material exchange processes

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0056] according to figure 1 , in a vertically placed degassing container 1, there are four wire loops 2 extending in the vertical direction. The wire loop 2 is fastened to a horizontally extending and here tubular distribution element 3 . The distribution part 3 is connected to a supply device 4 . The degassed product is removed at the sump 5 of the container 1 by means of a gear pump 6 . The residual steam generated during degassing is discharged through the pipe joint 7. Via the pipe connection 7 a predetermined reduced pressure can be set in the container 1 . The container 1 can be heated by an electric heating device (not shown).

[0057] figure 2 Indicates how the wire loop 2 is fixed on the distribution pipe 3. They are hung on the slot-shaped opening 8 arranged on the upper part of the distribution pipe 3 in such a way that the slot-shaped opening 8 extends longitudinally over the entire width of the wire loop, so that the wire loop receives the liquid product t...

example 2

[0059] In another evaporator configuration (top view and side view) as shown in FIG. 3 , the distribution element for feeding the liquid product consists of a nozzle plate 9 with openings 10 . The wire loop 2 is fastened, such as soldered or welded, on the underside of the nozzle plate 9 . The liquid product is supplied via a supply line 11 covering the entire cross section of the nozzle plate 9 . The inlet pipe 11 can also be designed in the form of a heat exchange pipe.

example 3

[0061] The distributing elements described in examples 1 and 2 can also be designed in this way. As shown in FIGS. 4 and 5 , the liquid product is sent to the wire loop 12 through the heat exchange tubes 12 arranged vertically in the container 1 . In the embodiment shown in FIG. 4 , the wire loops 12 are placed respectively on the outlets of the heat exchange tubes 12 , ie in this case the heat exchange tubes directly serve as supports for the wire loops 2 . In order to be more stable, at its bottom end, the wire loops 2 are connected by horizontal bars 13 to form a grid (see top view). On the contrary, in the modified embodiment shown in FIG. 5 , the wire rings 2 are respectively arranged on two adjacent heat exchange tubes 12 , so that liquid is supplied into the wire rings 2 through two liquid input mechanisms respectively. In this embodiment, the ends of the tapered loops are connected by crossbars 13 .

[0062] In all the above examples the wire loop 2 is bent from a 1....

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Abstract

An apparatus for carrying out mass transfer processes with high-viscosity liquids is described, particularly for boiling down and / or devolatilizing polymer melts, comprising at least a vertically arranged vessel (1) having a feeder means (4) for the liquid to be treated, an outlet (7) for volatile components and an outlet (6) for the treated liquid, the feeder means (4) being equipped with a distributor element (3) having a multiplicity of orifices (8, 10) for subdividing the high-viscosity liquid to be treated into a multiplicity of individual streams, characterized in that essentially vertically arranged wire loops (2) are disposed in the vicinity of the orifices (8, 10), along which wire loops the high-viscosity liquid runs off under the action of gravity.

Description

technical field [0001] The invention relates to industrial plants for carrying out mass exchange processes in highly viscous liquids, in particular for the concentration and / or degassing of polymer melts. The device is primarily based on a vertically positioned vessel in which the high-viscosity liquid to be treated is divided into individual streams that flow under the force of gravity into a pool of liquid in the vessel. Background technique [0002] Important mass exchange methods for liquids are the concentration and degassing of solutions, suspensions or melts. Especially in the production of polymeric plastics, the problem arises that low molecular weight substances such as water or monomers separate out of the plastic melt, since these substances adversely affect the product quality or are even toxic. [0003] To concentrate the polymer melt, according to the prior art, thin-film evaporators are often used, as described in documents DE3310676A1, DE4328013A1 and US363...

Claims

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Application Information

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IPC IPC(8): B01D1/00B01D3/06B01D19/00B01J4/00B01J19/24B29B13/00
CPCB29B13/00B01J4/001B01D19/0047B29B2013/005B29K2069/00B01D3/06Y10S159/10B01J19/24
Inventor K·科尔格吕伯F·维里希
Owner BAYER AG
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