烟气流量及二氧化碳分压对氨法减排效率的影响

减少二氧化碳的排放,进一步使其资源化,是中国乃至世界能源生产所需要解决的重大问题。氨法吸收燃煤烟气中的二氧化碳是目前国际上的一个重要研究方向,具有良好的应用前景。为考察燃煤烟气流量以及二氧化碳分压对氨法吸收燃煤烟气中二氧化碳效率的影响,文章在实验室模拟烟气采用氨法吸收烟气中CO2,选用R=50%碳化氨水作为CO2吸收剂,选择填料塔做反应器,考察了烟气流量以及CO2分压对CO2脱除率的影响。研究发现,烟气流量越小,塔内气、液反应时间越长,CO2脱除率越高。在不同烟气流量的条件下,吸收液碳化度均超过130%。混合烟气流量为1 L/min,CO2分压为0.046 MPa时,脱除率最高,反应出液碳化度最大,结晶效果最好。

Influence of Flue Gas Flow Rate and CO2 Partial Pressure on Removing CO2 in Flue Gas with Carbonated Ammonia Water Solution

To reduce and ultimately control carbon dioxide emission during energy production and utilization are very important.As an absorbent,ammonia water is used for CO2 absorbed in flue gas.Effects of gas flue flow rate and CO2 partial pressure for the removal efficiency of CO2 were studied in the filled tower with R=50% carbonized ammonia hydroxide.Results showed that removal efficiency of CO2 by ammonia absorption increased with increasing the reaction time in the tower and decreasing velocity of flue gas.The carbonized ratio is beyond 130% at different velocities of flue gas.The best result is obtained at the condition of velocity of flue gas 1L/min and CO2 partial pressure 0.046 MPa.