Polyamide production system and polyamide production method

Abstract

The invention discloses a polyamide production system. The polyamide production system comprises a polymerization plant, an acidification kettle, a plate-and-frame filter press, a transferring kettle, a centrifugal separation device, a film evaporator, a molecular distillation device, a pipeline switching and filtering device, a polycondensation device, a filtering device and a pelleting system sequentially from front to back according to a technical process, and further comprises a waste gas treating device and a waste water treating system. The waste gas treating device is used for subjecting waste gas produced in a production process to decomposition and sedimentation treatment. The waste water treating system is used for subjecting waste water produced in the production process to purification treatment. The invention further discloses a polyamide production method for the polyamide production system. The polyamide production system and the polyamide production method have the advantages of high processing efficiency, high processing safety, low product impurity rate and capabilities of treating the waste water and the waste gas produced in the production process, and are mainly applied to the technical field of polyamide production.

Description

technical field [0001] The invention relates to the field of polyamide preparation, in particular to a polyamide production system and a production method thereof. 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...

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

In the traditional process, the particles granulated by the granulator are directly fed, but at this time the particles have not been cooled and some organic waste gas is still volatilized

In addition, due to the fact that some lighter flocs will be produced during the granulation process, they will be brought into the unloading device after direct feeding, 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.

[0015] Seventh, the waste gas and waste water generated in production also need to be improved and improved in terms of impurity removal, decomposition and purification.

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