粉煤气化系统中Cu、Ni、Zn等重金属元素迁移规律的研究

Study on Migration Rule of Heavy Metal Elements Such as Cu, Ni and Zn in Pulverized Coal Gasification System

研究粉煤气化过程中潜在有毒微量元素的富集机理及其对环境的影响不仅有理论意义,且有很大的实际价值。以航天粉煤加压气化工艺系统为基础,依托某航天炉实际工厂运行数据,设计了痕量元素在线取样系统,采用分析化验的方法,研究了粉煤气化过程中Cu、Ni、Zn等重金属元素的迁移规律。结果表明:在航天粉煤气化过程中,煤中Cu、Ni、Zn迁移到固相中的比例分别为99.76%、96.82%、97.47%;迁移到液相中的比例分别为0.16%、0、0.95%;迁移到气相中的比例分别为0.08%、3.18%、1.58%。

It is not only of theoretical significance,but also of great practical value to study the enrichment mechanism of potential toxic trace elements,and its impact on the environment in the process of pulverized coal gasification.In the paper,on-line sampling system was designed,and the migration rules of Cu,Ni and Zn elements in the HT-L gasification process was studied with test analysis method on the basis of a HT-L pulverized coal gasification system and actual operating data in the plant.The results showed that,during the HT-L pulverized coal gasification,the proportion of Cu,Ni and Zn in coal migrating into solid phase was 99.76%,96.82%and 97.47%respectively,that migrating into liquid phase was 0.16%,0 and 0.95%respectively,and that migrating into gas phase was 0.08%,3.18%and 1.58%respectively.