Combined sealing system for stirring shaft of reaction kettle and application of combined sealing system

Abstract

The invention provides a combined sealing system for a stirring shaft of a reaction kettle. The combined sealing system of the stirring shaft of the reaction kettle includes an external magnetic driving part, an atmospheric side magnetic force sealing cavity, an internal magnetic transmission part and a stirring shaft body, the external magnetic driving part and the internal magnetic transmissionpart successively sleeve the outer side of the stirring shaft body from outside to inside to form an atmospheric side magnetic force sealing structure, and the upper and lower sides of the atmosphericside magnetic force sealing structure are provided with bearings correspondingly; a second flange, a second medium side mechanical sealing cavity, a first flange and a first medium side mechanical sealing cavity successively sleeve the outer side of the stirring shaft body from top to bottom of the atmospheric side magnetic force sealing cavity to form a medium side second mechanical sealing structure and a medium side first mechanical sealing structure; and the medium side second mechanical sealing structure is located at the lower part of the atmospheric side magnetic force sealing cavity,and particles in the second medium side mechanical sealing cavity are prevented from entering the atmospheric side magnetic force sealing cavity. The combined sealing system has the advantages of highsecurity, good stability, easy maintenance, long service life and the like.

Description

technical field [0001] The invention relates to the technical field of sealing in a reaction system with a medium-high pressure reactor, in particular to a reactor stirring shaft suitable for a reaction system in which the medium in a medium-high pressure reactor has the characteristics of solid particles, flammable, explosive, and highly toxic. Combined sealing system and its application. Background technique [0002] The reactor is the key equipment of chemical production, and the sealing device of the stirring shaft of the reactor is the key component of the reactor, and it is the first line of defense for the safe production of the chemical industry. Suspension polymerization has the characteristics of high reaction pressure, high solid content of reaction medium, flammable and explosive material medium, and most of them are toxic. Therefore, it is very important to study the sealing device for stirring the polymerization reactor. At present, the existing sealing devic...

AI Technical Summary

Problems solved by technology

This method achieves the upper and lower balance of the sealing assembly by adding a pressure balance tank, but the single-end mechanical seal is easy to cause seal failure in a system with high solid content, and solid particles enter the circulating cooling liquid, causing the stirring bearing to enter solid particles and cause agitation accidents stop

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