摘要:
焚烧是常用的废物处置方法,中国每年需要处量理的废物随社会发展和经济增长不断增加,由此产生的二噁英排放问题已引起社会广泛的关注。选择性催化氧化(SCO)技术可降解烟气中二噁英,在国外已有广泛工业应用,是最佳可行技术的重要组成部分,是我国斯德哥尔摩公约履约过程中的关键技术。为落实我国斯德哥尔摩公约履约责任,减少废物焚烧过程中二噁英类污染物的排放,促进行业全面推广应用以选择性催化氧化为代表的最佳可行技术,文章主要从SCO技术的发展、原理和影响因素出发选择合适的催化剂,结合国内工程案例验证分析了SCO技术对二噁英的去除效果,讨论了SCO技术应用的现状和前景,进一步说明在国内的废物焚烧领域推广和普及SCO技术的紧迫性和可行性。
Abstract:
Incineration is a commonly used approach for waste treatment. With the rapid social and economic development in China, the amount of waste to be disposed is continuously increasing year by year and dioxins emission problems caused hereby have drawn wide public attention. As an important component of the best available technologies (BAT), selective catalytic oxidization (SCO) is widely applied in industrial dioxins degradation abroad and is a crucial technology in the Stockholm Convention implementation process in China. Aiming at implementation of the obligation of China under the Stockholm Convention, reduction of the dioxins release in the waste incineration process and facilitation of wide application of BAT such as SCO in the industrial sectors, in this study, on the basis of development, theory and impact factors of SCO technology, suitable catalysts are selected. Removal efficiency of dioxins by use of SCO technology is analyzed based on the validation of domestic engineering projects. The current status and prospect of SCO technology application is also discussed, further indicating that promoting and duplicating SCO technology in waste incineration is urgent and feasible in China.
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