汞在活性焦脱硫工艺中的迁移规律

Study on Mercury Migration in the Process of Activated Coke Desulfuration

搭建了固定床试验系统,对比分析了活性焦与商用脱汞活性炭的汞吸附性能,并在10000m^3/h(标态)的活性焦脱硫中试试验系统上对活性焦的脱汞性能进行验证,同时结合固定床吸附试验系统分析了活性焦解析工艺中汞的释放规律。研究表明:活性焦的饱和汞吸附容量仅为脱汞活性炭的1/123,活性焦脱硫工艺对汞的脱除效率接近100%,出口活性焦汞吸附量为活性焦饱和汞吸附量的1/24,在解析工艺中,汞的释放率达到76.6%~98.4%,可以实现循环利用。

A fixed bed reactor was constructed in order to analyze the difference between activated coke and commercial activated carbon for mercury adsorption properties. The performance of activated coke removing mercury was tested in the activated coke desulfurization pilot system of 10000 m^3/h under standard condition. In addition, the releasing rules of mercury during the activated coke regeneration technology were studied by the fixed bed reactor. The study shows that the saturated mercury adsorption capacity of active coke is only 1/123 of activated carbon. The removal efficiency of mercury during the activated coke desulfurization process reaches almost 100%. Furthermore, the mercury adsorption capacity of the activated coke in the outlet of the adsorption tower is 1/24 of the saturated mercury adsorption capacity of activated coke. During the regeneration process, mercury release rate is in the range 76.6%-98.4%. Active coke can be used for cyclic mercury removal.