Structural transformation and performance analysis of PPS-based bag filters in coal-fired power plants

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2023-03-05 DOI:10.1177/09540083231162511

Weilong Cai, Wei Wang, Z. Zheng, Jingyun Zhang, Hong Cao, Jianying Huang, Bing Zhang, Y. Lai

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引用次数: 1

Abstract

Owing to the complicated environments, the service life of bag-filter or electrostatic-bag composite precipitators with polyphenylene sulfide (PPS) is greatly deviated from the ideal time. In this paper, the structural transformation of PPS-based bag filter materials collected from the coal-fired power plants with different loading units were investigated systematically. As the SO2 content increases, the surface evolution of PPS fibers from smoothness to crack occurs. An opposite trend is observed for melting point and cross breaking strength. The major reason for the failure of PPS-based bag filters is that working temperature (T) often passes through acid dew gas point (Ta), and the SO3 would be produced during the condensing of H2SO4 when T is lower than Ta. The SO3 with strong oxidation would attack the weak C-S bonds of PPS, resulting in the oxidation or even sulfonation of PPS-based bag filters. This work discloses the actual structural evolution of PPS and some corresponding rules under the complicated corrosive gases with high temperatures, which provides a guidance for prolonging the service life of PPS-based bag filters during the usage of coal-fired power plants.

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燃煤电厂pps袋式除尘器结构改造及性能分析

由于环境复杂，聚苯硫醚(PPS)布袋除尘器或静电布袋复合除尘器的使用寿命与理想使用寿命相差很大。本文系统地研究了燃煤电厂不同装载机组收集的pps基袋式滤料的结构变化。随着SO2含量的增加，PPS纤维表面由光滑向裂纹演化。熔点和交叉断裂强度则呈现相反的趋势。pps布袋除尘器失效的主要原因是工作温度T经常经过酸露气点Ta，当T低于Ta时，H2SO4冷凝时会产生SO3。具有强氧化作用的SO3会攻击PPS的弱C-S键，导致PPS基袋式过滤器被氧化甚至磺化。本工作揭示了高温复杂腐蚀气体作用下PPS的实际结构演变及相应规律，为燃煤电厂使用过程中延长PPS布袋除尘器的使用寿命提供了指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.