摘 要
本设计采用MDEA法选择性脱硫工艺。MDEA法具有很好的选择吸收能力，兼有物理和化学吸收，溶剂负载量大，净化度高；在各种醇胺液中，MDEA溶液与酸性气体的溶解热最低，吸收与再生间温差小，能耗低；稳定性好，对碳钢基本无腐蚀；MDEA溶液蒸汽压低，吸收酸性气体溶剂损失小。硫化氢和二氧化碳接触胺溶液时，均被胺溶液吸收，并尽量减少能源的消耗。
天然气脱水中应用最多的是三甘醇工艺。本设计采用三甘醇作为脱水剂。脱水过程中，三甘醇（TEG）脱水的工艺性质为连续性吸收再生，能耗中等，投资也中等，且没有环境问题。另外，结构填料能够将塔的规模减小，费用降低。结构填料提供了更大的吸收率、更高的处理量及较低的压降。
关键词：MDEA法；胺液脱硫；三甘醇工艺；结构填料
ABSTRACT
This design uses the MDEA-type selective desulfurization process. MDEA method has very good absorptive capacity, both physical and chemical absorption, solvent load capacity, high degree of purification; in alcohol amine solution, MDEA solution with the lowest heat of solution of acid gases, absorption and regeneration of small temperature difference between low energy consumption; good stability, no corrosion on carbon steel; Vapour pressure of MDEA solution, acidic gas solvent loss. Contact solution, carbon dioxide and hydrogen sulfide are absorbed by the solution, and to minimize the consumption of energy. TEG is most widely used in natural gas dehydration technology.
This design uses the TEG dehydrating agent. Dehydration process, triethylene glycol (TEG) dehydration process is a continuous absorption regeneration medium energy consumption, investment is medium, and there are no environmental issues. In addition, structured packing Tower can be smaller, lower costs. Structure packing offers greater absorption, high capacity and low pressure drop.
Keywords: MDEA method; Amine desulfurization; TEG process; Structured packing
