| 超低排放路线下燃煤烟气可凝结颗粒物在WFGD、WESP中的转化特性 |
| 摘要点击 2545 全文点击 686 投稿时间：2018-05-31 修订日期：2018-07-20 |
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| 中文关键词 可凝结颗粒物(CPM) 转化 湿法脱硫 湿式电除尘 酸雾 |
| 英文关键词 condensable particulate matter (CPM) conversion wet flue gas desulfurization(WFGD) wet electrostatic precipitator(WESP) acid mist |
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| 中文摘要 |
| 固定污染源可凝结颗粒物在监测时常被忽视，为了减少可凝结颗粒物排放，本文研究了其在烟气净化设施中的转化规律.结果表明，湿法脱硫装置、湿式电除尘装置对可凝结颗粒物的去除有协同作用，烟气中可凝结颗粒物质量浓度均高于可过滤颗粒物，但总颗粒物（可凝结颗粒物和可过滤颗粒物之和）排放量达到超低排放要求.在湿法脱硫进出口处可凝结颗粒物中有机物的质量浓度均超过了无机物的质量浓度，但在湿式电除尘出口处趋近相等.根据可凝结颗粒物无机部分水溶性离子成分及浓度的测试结果，推测可凝结颗粒物捕集过程中会有PM0.3进入，可凝结颗粒物形成过程中会产生酸雾，并且在湿法脱硫、湿式电除尘作用下，酸性加强.本研究发现SO42-是可凝结颗粒物无机部分主要的特征水溶性离子. |
| 英文摘要 |
| Monitoring of condensable particulate matter (CPM) emitted from stationary pollution sources has often been neglected. To reduce the emission of CPM, it is necessary to study its transformation rules in flue-gas cleaning devices. The results show that the wet flue gas desulfurization (WFGD) and wet electrostatic precipitator (WESP) have a good synergistic effect on the removal of CPM. The concentration of CPM in flue gas is higher than that of filterable particulate matter, but the concentration of total particulate matter (sum of the condensable particulate matter and filterable particulate matter) reaches ultra-low emission requirements. The organic mass concentration of CPM in the WFGD inlet and outlet is larger than that of inorganic components, which is equalized during the treatment of WESP. Based on measurements of the components and concentrations of water-soluble ions in the inorganic part of the CPM, PM0.3 can be joined during the CPM trapping process and an acid mist is generated during the condensable particulate matter formation. The acid mist is strengthened through the treatment of WFGD and WESP. The experiment results also show that SO42- is the main component of water-soluble ions in the inorganic part of CPM. |
