Polymerization exhaust spraying system

Abstract

The embodiment of the invention provides a polymerization exhaust spraying system. The system comprises a polymerization kettle, a spraying tank and a water-sealed tank; the spraying tank is connected with the polymerization kettle, so that gas generated in the polymerization kettle enters the spraying tank; a spraying device is arranged in the spraying tank; the spraying tank is connected with a tail gas system, so that non-condensable gas in the spraying tank enters the tail gas system; the water-sealed tank is connected with the bottom of the spraying tank, so that liquid in the spraying tank flows back to the water-sealed tank; the water-sealed tank is connected with the spraying device so as to provide spraying water for the spraying device; the water-sealed tank is connected with an emptying pipeline and an overflow pipeline, and the emptying pipeline and the overflow pipeline are connected through a branch pipeline; a first stop valve and a second stop valve are arranged on the emptying pipeline; a third stop valve is arranged on the overflow pipeline; and a fourth stop valve is arranged on the branch pipeline. The spraying system is good in spraying effect, stable proceeding of a polymerization reaction is facilitated, and the polymerization viscosity is stably increased.

Description

technical field [0001] The invention belongs to the technical field of polyamide elastomer polymerization, and in particular relates to a polymerization exhaust spray system. Background technique [0002] When polyamide and other elastomers are polymerized and produced, caprolactam will be carried in the non-condensable gas generated. Caprolactam needs to be recovered to improve production efficiency, and at the same time avoid blocking the pipeline of the system after cooling and crystallization of caprolactam, resulting in poor exhaust and high pressure. Fluctuations, which in turn affect polymer viscosity growth. Contents of the invention [0003] In view of the above-mentioned problems in the prior art, the purpose of the embodiments of the present invention is to provide a polymerization exhaust spray system that can increase the polymerization viscosity steadily and improve product stability. [0004] The technical solution adopted in the embodiment of the present i...

AI Technical Summary

Problems solved by technology

[0002] When polyamide and other elastomers are polymerized and produced, caprolactam will be carried in the non-condensable gas generated. Caprolactam needs to be recovered to improve production efficiency, and at the same time avoid blocking the pipeline of the system after cooling and crystallization of caprolactam, resulting in poor exhaust and high pressure. Fluctuations, which in turn affect polymer viscosity growth

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