胺液中Na~+对脱硫过程的影响及对策

大连西太平洋石油化工有限公司硫磺装置胺液脱硫系统在运行过程中出现贫胺液中硫化氢含量过高、脱硫后气体中硫化氢含量超标等问题,研究发现胺液中含有大量的Na~+(高达7 800μg/g)是导致上述现象的主要原因。经实验室多次试验后,确定采用离子交换方法脱除胺液中的Na~+。工业应用结果表明,脱钠后的贫胺液中硫化氢浓度由4.0g/L降低到1.5g/L,气体脱硫深度显著提高,同时脱硫系统蒸汽使用量减少8t/h。

INFLUENCE OF Na+ IN AMINE SOLUTION ON DESULFURIZATION AND COUNTERMEASURE

The problems which hydrogen sulfide (H2S) content in lean amine and desulfurized gas is not on-standard was appeared in West Pacific Petrochemical Co., Ltd. Dalian sulfur recovery plant amine desulfurization system during process operation. It is found that the main reason of the above problem is there was large amount of sodium ions (up to 7800ppm) in amine solution. With many experiments in lab, the ion exchange method is used to remove sodium ion from the amine solution. The hydrogen sulfide content analyzed in the sodium-removed lean amine solution reduced from 4g/L to 1.5g/L in industrial application, and gas desulphurization depth is increased significantly. Meanwhile desulfurization system steam usage decreased by 8t/h.