化学链燃烧抑制二噁英生成技术研究进展

Research Progress on the Inhibition Technology of PCDD/Fs Formation for Chemical Looping Combustion

通过介绍近年来二噁英(PCDD/Fs)的生成机理及其控制技术的研究进展,指出现有PCDD/Fs控制技术仍未能从进一步控制氧源和碳源角度降低PCDD/Fs排放。着重介绍了化学链燃烧(CLC)技术抑制PCDD/Fs的生成机理、反应过程脱氯效率以及氯元素迁移路径的诊断预测,提出CLC技术所引入的晶格氧可作为PCDD/Fs生成的潜在氧源,应重视对氧载体种类的优选以及改进。同时阐述了多种污染物协同脱除的应用特点,添加剂改进与运行参数匹配是其技术研发的要点。

By introducing the research progress of the formation mechanisms and the control technologies of PCDD/Fs in recent years, it was pointed out that the existing PCDD/Fs control technologies still failed to achieve low PCDD/Fs emission from the perspective of further controlling oxygen and carbon sources. The emphasis was put on the PCDD/Fs inhibition mechanism for chemical looping combustion(CLC) technology, the dechlorination efficiency in reaction process as well as the chlorine migration path diagnosis and prediction. Then it was proposed that the lattice oxygen introduced by CLC technology can be used as the potential oxygen sources for PCDD/Fs formation, and attention should be paid to optimization and improvement for oxygen carrier(OC). After describing the application characteristics of various pollutants synergistic removal, the improvement of additives and the matching of operation parameters were the key points of the technology.