Adiponitrile hydrogenation reaction system and method for dealing with severe blockage of reactor by system

Abstract

The invention discloses an adiponitrile hydrogenation reaction system and a method for dealing with severe blockage of a reactor by the system. The system is formed by adding an additional pipeline Aand an additional pipe B based on an existing production system in order to realize communication of pipelines among a reactor feed pump preparation station, a reactor sampling tank and a returning pipe when dealing with blockage of the returning pipe by opening or closing a hand valve. The method comprises the following steps: using ethanol continuously fed into the returning pipe as a pressure source; forming a pressure in the blocked returning pipe; after continuing to feed the ethanol for a certain period of time, rapidly opening a hand valve B, so that the pressure in the returning pipe pours down in an instant and runs at blockages; repeating the process for several times to carry away small particles of catalyst severely blocked in the returning pipe so as to dredge the returning pipe. The system and the method provided by the invention solve a problem of severe blockage of the returning pipe of the reactor without stopping during adiponitrile hydrogenation reaction production,keep continuous production, reduce costs indirectly and improve production efficiency.

Description

technical field [0001] The invention relates to the technical field of adiponitrile hydrogenation reaction to produce hexamethylenediamine, in particular to an adiponitrile hydrogenation reaction system and a method for treating severe clogging of a reactor in the system. Background technique [0002] Now the return pipe of the adiponitrile hydrogenation reactor is often blocked due to poor catalyst flow, which brings great pressure to the daily operation of the adiponitrile hydrogenation reaction. The main reason for reactor blockage is that the particle size of the catalyst becomes smaller, the viscosity is higher, the fluidity becomes worse, and the catalyst hangs on the wall and accumulates in the decanter. Once the reactor is clogged, if it is not handled in time, it will seriously affect the daily operation of the hydrogenation reaction of adiponitrile, and accidents such as the flooding of the hydrogen scrubber. The characteristics of the adiponitrile hydrogenation r...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of severe blockage of the return pipe in the reactor during the hydrogenation reaction of adiponitrile, the present invention discloses a hydrogenation reaction system for adiponitrile. Compared with the prior art, the reaction system adds additional pipelines A and The additional pipeline B makes it possible to use this system to solve the problem of severe blockage of the return pipe without stopping the reaction;

[0004] In order to solve the problem of severe blockage of the return pipe in the reactor during the hydrogenation reaction of adiponitrile, the present invention discloses a method for dealing with severe blockage of the reactor, which uses the hydrogenation reaction of adiponitrile in the present invention Relying on the system, it can effectively solve the problem of severe blockage of the return pipe, and the operation is simple and the effect is good

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