Polyamide granulation system

Abstract

The invention discloses a polyamide granulation system. According to the technological process, a granulation mechanism, a granulation conveying mechanism and a granulation grading discharging mechanism are sequentially included from front to back; the granulation mechanism comprises a distributing device and a transmission device; the granulation conveying mechanism comprises a conveying device, and conveys granules flowing out of the granulation cylinder; a plurality of automatic spraying devices are arranged on one side of the conveying device, and a waste gas collection device is arranged above the conveying device; the waste gas collection device comprises an air draft device and a ventilation channel; and the granulation grading discharging mechanism comprises a scraper, a sieve, a discharging hopper, an air blower, a separating device, a discharging pipe, a floccule collecting device and a second multi-way pipe. Mounting flexibility of a motor can be improved, the impurity rate of a product obtained after granulation is reduced, and the system has the advantages of having the grading function, being capable of carrying out proper cooling, exhausting organic waste gas in time, and ensuring normal operation of a leveling plate.

Description

technical field [0001] The invention relates to the field of polyamide preparation, in particular to a polyamide granulation system. Background technique [0002] Polyamide resin, referred to as PA, is a polymer with amide bonds in the main chain. It can be obtained by polycondensation of dibasic amine and dibasic acid, and ring-opening polymerization of lactam. A variety of polyamide resins can be obtained due to the different types of dibasic acids and diamines used. According to the relative molecular weight, it can be roughly divided into high molecular polyamide resin and low molecular polyamide resin. [0003] High-molecular polyamide resin, known as nylon or nylon, is composed of straight-chain aliphatic dibasic acid and diamine. It is mainly used to prepare synthetic fibers and engineering plastics. It is a kind of polyamide resin with relatively complete development and research technology. . [0004] Low-molecular-weight polyamide resin is obtained by polyconde...

AI Technical Summary

Problems solved by technology

This granulation method needs to fix a motor position on the granulator, and the flexibility of equipment installation is poor

[0010] Second, the particles of polyamide granulated by the granulator are directly fed, but at this time the particles have not cooled down and some organic waste gas is still volatilized, and such organic waste gas is not easy to collect and discharge

In addition, the cloth board will wrinkle after working for a long time, which seriously affects the conveying efficiency

[0011] Third, when the polyamide is fed after granulation, some lighter flocs will be produced during the granulation process, and the direct feeding will be brought into the feeding device, which will cause trouble for subsequent cleaning

Moreover, the granulation and classification discharge process of the traditional process is mostly manually screened, and the screening efficiency is low.

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