去除烧结和电炉废气中二恶英的方案

20世纪90年代初，由于各国政府和绿色环保组织要求极大降低二恶英和其他有害物质的排放量，使钢铁工业遭受巨大压力，从那时起，奥钢联工程技术公司（VAI）就着手进行新一代烧结废气净化系统和创新型电炉废气净化技术的开发，一个主要目标就是要开发出一种新系统，与传统系统相比，不仅具有更高的除尘效率，而且还能够有效地去除二恶英和其他有害物质，努力的结果是，开发出的系统可使二恶英的去除效率达到80％－99％，即净化后气体中二恶英的浓度可降至0．1－0．4ng I-TEQ。

SOLUTIONS FOR DIOXIN REMOVAL FROM SINTER PLANT AND EAF OFFGAS

In the early 1990s the iron and steel industry was placed under considerable pressure by the respective authorities and green parties to dramatically reduce the level of dioxins and other harmful emissions At that time VAI commenced with the development of a new generation offgas cleaning system for sinter plants and investigated innovative offgas cleaning solutions for electric arc furnaces (EAF) as well One objective of these activities was to develop a system which-in comparison with conventional systems-would not only more efficiently remove dust from the offgas stream,but which would also be capable of effciently removing dioxins and other undesirable substances The outcome of these efforts were systems which featured a dioxin removal efficiency of 80 % to 99 % This represents a dioxin clean gas concentration from below 0 1 ng I TEQ to 0 4 ng I TEQ