摘要
采用膜分离技术回收合成氨贮罐气中的氢组分,返回合成氨系统作为加氢脱硫单元的氢源。设计膜分离器时,膜面积增加使渗透气氢浓度降低而经济效益上升。当贮罐气流量1300Nm3/h、渗透气绝压为0.8MPa,氢产品浓度为85%-90%时,可以获得约287.7×104Yuan/a以上的经济效益,投资回收期在17个月内。在膜分离器操作时,氢氮选择性系数降低以及贮罐气压力降低都会引起氢回收率降低,导致经济效益下降,二者对氢浓度的影响不明显。
Pressure and temperature of tank gas purged from ammonia synthesis are relatively low. In this pa- per, membrane separation technique was applied to recover hydrogen from tank gas. The recovered hydrogen then returned back to the desulfuration unit as feed. With the increase of membrane area, concentration of hydrogen de- creased whereas economic benefit increased due to the increasing recovery. Over 287.7 × 104 Yuan/a＇s benefit could be reached at the feed -in of tank gas 1300Nm3/h, pressure of permeated gas 0.8MPa and concentration of hydrogen 85 -90% as required. The recovery term of investment was within 17 months. During the operation of the sepa- rator, decrease of selective coefficient of H/N and increase of gas pressure may cause decrease of hydrogen recovery and economic benefit. There are little effect of the above two factors on concentration of hydrogen.
出处
《贵州化工》
2010年第1期19-21,共3页
Guizhou Chemical Industry
关键词
合成氨
氢回收
膜分离贮罐气
ammonia synthesis
hydrogen recovery
membrane separation
tank gas
