Abstract:

The emission of various pollutants in the combustion flue gas is the most important source of air pollution, and it is of great significance for the control of multi-pollutants of flue gas. This paper reviews two technologies at home and abroad regarding the removal of multi-pollutants from flue gas: traditional tandem removal technology and integrated synergistic removal technology. Compared with the traditional tandem removal technology, the multi-pollutant integrated synergistic removal technology has the advantages of high system efficiency, long service life, small floor space, low operating cost and wide application fields, and is the development trend of multi-pollutant treatment of flue gas. The ceramic filter tube catalyst technology has become a promising integrated synergistic removal technology with its unique asymmetric and pore size gradient structure. The researches on ceramic filter tube catalysts at home and abroad were mainly focused on the selection of filter tube and the process of denitrification catalyst loading. The research on the catalytic activity, filtration pressure drop and performance stability of the catalyst around the filter tube has achieved certain results. Based on the current research status of ceramic filter tube catalysts, this paper puts forward some suggestions for the development of catalyst technology for flue gas multi-pollutant ceramic filter tubes.

Key words: flue gas multi-contaminant, traditional tandem removal technology, integrated synergistic removal technology, ceramic filter tube catalyst, denitrification catalyst

摘要：

燃烧烟气中各污染物的排放是大气污染的最主要来源，针对烟气多污染物的治理意义重大。本文综述了国内外目前关于烟气多污染物脱除的两种技术，即传统串联脱除技术和一体化协同脱除技术。相比于传统串联脱除工艺，多污染物一体化协同脱除技术具有占地面积小、运行费用低、应用领域广的优点，是烟气多污染物治理的发展趋势。而陶瓷过滤管催化剂技术以其独有的非对称、孔径梯度变化的结构特性，成为一种极具应用前景的一体化协同脱除新技术。国内外关于陶瓷过滤管催化剂的研究主要从过滤管元件的选材和负载脱硝催化剂的工艺方法这两方面，围绕过滤管催化剂的催化活性、过滤压降及性能稳定性的进行研究，取得了一定的成果。结合当前陶瓷过滤管催化剂的研究现状，对今后烟气多污染物陶瓷过滤管催化剂技术的发展提出了建议。

关键词: 烟气多污染物, 传统串联脱除, 一体化协同脱除, 陶瓷过滤管催化剂, 脱硝催化剂