氨作碱源COG脱硫过程中氨的作用与形态行为

分析了氨在焦炉煤气脱硫过程中的作用:增加脱硫液硫容、使H2S的吸收持续进行、抗CO2、HCN等酸性物质对H2S吸收的干扰作用。游离氨浓度决定了脱硫效率的高低,给出了适应脱硫效率要求的溶液中游离氨浓度计算过程。氨在脱硫过程中的形态行为对脱硫效率起着决定性作用,最大限度地发掘与发挥氨有利于脱硫过程的形态行为,对于指导工艺过程优化,改进设备配置会起到促进作用。

Effect,Form and Behavior of Ammonia as Alkali in the Process of COG Desulfurization

The function of ammonia in the COG desulfurization process is analyzed as follows： it increases the sulfur capacity of the desulfurization solution so that the H2S absorption can be continued; it can resist acidic materials such as CO2, HCN in their interference of H2S absorption. The concentration of free ammonia determines the desulfurization effi- ciency. The calculation process of free ammonia concentration in the solution that meets the requirement of the desulfur- ization efficiency was given. The ammonia form and behavior during the desulfurization process play a decisive role in the desulfurization efficiency. To tap, to the maximum, the form and behavior of ammonia which are favorable for desulfuriza- tion is inevitably a boost in the process optimization and improvement of equipment configuration.