碳分子筛变压吸附（PSA）法制取高纯度氮气的工艺研究

发布时间：2018-05-01 15:09

本文选题：变压吸附 + 碳分子筛　；参考：《华东理工大学》2010年硕士论文

【摘要】：本文提出了一种碳分子筛变压吸附制氮技术的改进工艺,通过设计不对称中部均压管路,增加产品氮充压和产品氮冲洗等工艺步骤,使氮气产品的纯度、装置的产氮量和氮回收率得到明显改善,使现有碳分子筛的生产能力和效率得到充分发挥,降低了成套设备的投资和长期操作费用。在此基础上,对装置的工艺参数进行优选,得到的最优设计工艺参数为：吸附剂型号为CMS-220,在空气压力为0.8MPa,制取氮气纯度99.99%时,氮冲洗比为10%时,氮气产率为89.3L/kg-h,氮回收率为23%,为工业装置的设计放大提供了有价值的基础数据。采用中部均压的吸附工艺流程,设计制作了生产规模为700Nm3/h的NGN-700E型工业制氮装置,装置连续满负荷运行一年的结果表明,与常规均压工艺流程相比,采用中部均压工艺NGN-700E变压吸附制氮装置制取高纯度99.99%氮气,其氮气产率和氮气回收率可分别提高10%和3%,且操作方便,能耗低,氮气产品价格比较稳定,每年可节省约九百多万元,经济效益十分明显,从投资回报率来看,投资回收期为六个月。
[Abstract]:In this paper, an improved technology for nitrogen production by pressure swing adsorption of carbon molecular sieve is put forward. The purity of nitrogen product can be made by designing asymmetric middle pressure homogenizing pipeline and increasing product nitrogen charging pressure and product nitrogen flushing. The nitrogen production and nitrogen recovery rate of the plant were improved obviously, the production capacity and efficiency of the existing carbon molecular sieve were brought into full play, and the investment and long-term operating cost of the complete equipment were reduced. On this basis, the process parameters of the device are optimized. The optimum design process parameters are as follows: the adsorbent type is CMS-220, when the air pressure is 0.8MPa, the nitrogen purity is 99.9999, the nitrogen washing ratio is 10. The nitrogen yield is 89.3 L / kg 路h, and the nitrogen recovery is 23%, which provides valuable basic data for the design and amplification of industrial units. A NGN-700E type industrial nitrogen production unit with a scale of 700Nm3/h was designed and manufactured by using the adsorption process of the central uniform pressure. The results showed that the unit operated continuously at full load for one year. High purity 99.99% nitrogen was produced by NGN-700E pressure swing adsorption process in the middle part of the plant. The nitrogen yield and nitrogen recovery can be increased by 10% and 3% respectively, and the operation is convenient, the energy consumption is low, and the price of nitrogen product is stable. It can save more than 9 million yuan each year, and the economic benefit is very obvious. From the point of return on investment, the investment payback period is six months.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TQ116.15

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