高温烟气用聚苯硫醚(PPS)滤料耐酸氧化腐蚀性的检测方法初探

Study on detection method for acid oxidation resistance of polyphenylene sulfide(PPS)filter materials for high temperature flue gas

对比实际工况中聚苯硫醚(PPS)滤料随使用时间增加而呈现的表面形貌、热稳定性和力学性能的变化状况,在实验室自搭建设备中模拟PPS滤料使用的实际工况,分析不同耐酸氧化腐蚀性检测条件对PPS滤料表面形貌、热稳定性和力学性能的影响。然后,结合化学结构的鉴定,筛选出接近实际工况中滤料变化规律的实验室检测条件。结果发现:PPS滤料在不间断喷淋H2SO4溶液、控制温度波动并通入SOx混合气体的自搭建设备中,发生了与实际工况中滤料相同且显著的氧化反应。该方法可用于检测高温烟气用PPS滤料的耐酸氧化腐蚀性,其在滤料的性能检测分析和工程应用使用寿命评估方面具有积极的意义。

By comparing the surface morphology,thermal stability and mechanical properties of polyphenylene sulfide(PPS)filter materials with the increase of use time in the actual working condition,the actual working conditions of PPS filter materials were simulated in the laboratory self-built equipment,and the influence of different acid oxidation corrosion detection conditions on the surface morphology,thermal stability and mechanical properties of PPS filter materials was analyzed.Then,combining with the identification of chemical structure,the laboratory detection conditions closed to the actual working conditions of filter media change law were screened out.The results showed that,the oxidation reaction of PPS filter materials was the same and significant as that of PPS filter materials in the actual condition,when the PPS filter materials were continuously sprayed with H2SO4solution,controlled the temperature fluctuation and passed into the SOxmixture.The method can be used to detect the acid oxidation corrosion resistance of PPS filter materials used for high temperature flue gas,which has positive significance in the performance detection and analysis of filter materials and the service life evaluation of engineering application.