A multi-layer drop tube falling film devolatilization reactor

Abstract

The invention relates to a multilayer falling pipe type falling film devolatilization reactor, which mainly comprises an outer tower and a plurality of tower cores, wherein the outer tower consists of a tower top, a tower body and a tower bottom; the plurality of tower cores arranged inside the outer tower are in sequential arrangement from top to bottom; each tower core consists of a tower plate and a plurality of falling film falling pipes in parallel arrangement; each falling film falling pipe consists of hollow pipes and a plurality of umbrella skirt-shaped falling sleeves which are provided with downward openings and are fixed on the outer side wall of the hollow pipes; the hollow pipes are mutually connected; heat media are introduced into the hollow pipes; a heat exchange pipeline is used for connection. Compared with a conventional reactor, the multilayer falling pipe type falling film devolatilization reactor has the advantages that the structure is simple; a large gas-liquid interface is realized; the stretching effect is generated on the film surface; the surface updating speed is high; the flow rate is high; the dwell time is controllable; the structure is simple; the additional power equipment is not used; the reaction energy consumption is low; the heat transfer efficiency is high.

Description

technical field [0001] The invention relates to a novel multilayer falling tube type falling film devolatilization reactor. Background technique [0002] The characteristic of the polycondensation process is that through the reaction between the terminal functional groups, the small molecule products are gradually removed but the molecular weight of the polymer is gradually increased. For the whole reaction process, the viscosity of the system increases continuously with the progress of the reaction, with tens of milliPascal seconds and finally even hundreds of thousands of milliPascal seconds. At this time, the removal of small molecular substances becomes extremely difficult. difficulty. Due to the relatively low thermal efficiency of the reaction, it is difficult for us to change the temperature to make the polycondensation reaction proceed effectively in the direction of the positive reaction to obtain qualified products. Therefore, we need to remove the small molecule ...

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Problems solved by technology

However, because the internal components of the reactor are too simple, there is not enough heating circulation pipeline, and only rely on the outer heating jacket of the outer tower for heat supply, the heat transfer efficiency is relatively low; and because the viscosity of the material is too high, it usually flows in a laminar state. It is difficult to form a sufficient surface renewal effect on the surface of the material only by gravity

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