转炉一次烟气超净排放改造的一种有效手段

An Effective Means for the Transformation of Ultra Clean Emission of Primary Flue Gas from Converter

摘要: 为应对气候变化，我国提出双碳目标，“十四五”规划也将加快推动绿色低碳发展列入其中。随着国家新环保法的实施，原有转炉因扩容、除尘系统年久失修、除尘系统排放设计指标低等原因，致使很多炼钢厂转炉一次烟气除尘系统已不能满足日益严格的超净排放要求，急需进行升级改造。分析国内前期建设的干法除尘系统，2016年以前建设的转炉干法除尘系统，均是按照系统排放低于15 mg/Nm³，甚至30 mg/Nm³设计建设的，基本都存在上述方面的需求。文章提出了一种转炉一次烟气超净排放改造的有效手段，在原有转炉干法除尘系统的基础上，不改变原有工艺和设备，增肌一种适用于转炉煤气工况的金属滤袋除尘器，以达到转炉一次烟气长期稳定达标排放的目的，为转炉炼钢超净排放和碳达峰贡献力量。

Abstract: In response to climate change, China has put forward the double carbon goal, and the 14th five year plan will also accelerate the promotion of green and low-carbon development. With the elimination of backward production capacity, the expansion of the original converter, the disrepair of the original dust removal system and the low emission requirements of the original dust removal system, the primary flue gas dust removal system of many steelmaking plants can not meet the increasingly strict ultra clean emission requirements, so it is urgent to upgrade and reform. Analyze the dry dedusting system built in the early stage in China. The converter dry dedusting system built before 2016 is based on the system emission of less than 15 mg/Nm³, even 30 mg/Nm³. The above requirements basically exist in the design and construction. This paper puts forward an effective means for the transformation of converter primary flue gas ultra-clean emission. On the basis of the original converter dry dust removal system, without changing the original process and equipment, a metal filter bag dust collector suitable for converter gas working condition is strengthened, so as to achieve the purpose of converter primary flue gas emission reaching the standard for a long time and contribute to converter steelmaking ultra-clean emission and carbon peak.