Treatment method and system for polyphenylene sulfide production synthesis waste gas

Abstract

The invention discloses a treatment system and method for polyphenylene sulfide production synthesis waste gas. The system comprises a washing tower and a tail gas tower which are connected in series.An alkali liquor inlet and a waste gas outlet are arranged in the top of the washing tower and an alkali liquor outlet and a waste gas inlet are arranged in the bottom; the washing tower waste gas inlet is connected with waste gas; the washing tower is provided with a circulating alkali tank and a first circulating alkali pump, and the first circulating alkali pump provides alkali liquor circulating power; an alkali liquor inlet and a waste gas outlet are arranged in the top of the tail gas tower and an alkali liquor outlet and a waste gas inlet are arranged in the bottom; the tail gas towerwaste gas inlet is communicated with the washing tower waste gas outlet through a pipeline; the tail gas tower waste gas outlet exhaust waste gas; the tail gas tower is provided with an alkali liquorpreparation tank and a second circulating alkali pump, and the second circulating alkali pump provides alkali liquor circulating power; and the alkali liquor preparation tank is communicated with a fresh alkali liquor pipeline and a circulating alkali tank pipeline. According to the system, the washing tower and the tail gas tower which are connected in series are adopted for carrying out two-stage treatment on waste gas so that the finally discharged waste gas is ensured to reach the environmental protection standard and environmental pollution is greatly reduced.

Description

technical field [0001] This application relates to the technical field of polyphenylene sulfide waste gas treatment, in particular to a treatment method and system for synthesis waste gas produced from polyphenylene sulfide. Background technique [0002] Polyphenylene sulfide is a high-performance thermoplastic resin with high mechanical strength, high temperature resistance, non-flammability, and good thermal stability. It is currently widely used in electronics, automobiles, machinery, and chemical industries. A large amount of tail gas containing hydrogen sulfide will be produced in the production process of polyphenylene sulfide, that is, synthetic waste gas from the production of polyphenylene sulfide. The existing tail gas treatment method is to directly use lye to chemically absorb the generated tail gas, and then discharge the tail gas. The shortcomings of existing treatment methods include: first, the quality and efficiency of tail gas treatment are not high, so th...

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Problems solved by technology

The shortcomings of existing treatment methods include: first, the quality and efficiency of tail gas treatment are not high, so that the exhaust gas is not up to standard or pollutes the environment; second, high-concentration lye is likely to cause equipment blockage and affect the quality of tail gas treatment

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