文昌9-2/9-3中心平台三甘醇脱水系统工艺设计

The Design of TEG Dehydration System of Wenchang 9-2/9-3 CEP

由气田采出的天然气,往往还含有硫化氢、二氧化碳、氮气和水蒸气等杂质。其中的酸性气体,溶于水后形成酸性溶液会腐蚀管道和设备;在低温下,天然气中的饱和水蒸汽可能会凝结成游离水甚至与一些小分子结合形成冰晶,这些水合物会在某个地方大量聚集,堵塞管道、阀门和设备。所以,对天然气进行脱水是天然气净化中至为重要的环节,对酸性气体含量高或需要远程输送的商品天然气尤其如此。文章结合文昌9-2/9-3/10-3气田基本设计项目中的三甘醇脱水装置,介绍了三甘醇脱水系统流程和工艺计算步骤。

Natural gas produced by the gas field, often containing hydrogen sulfide, carbon dioxide, nitrogen and water vapor and other impurities. The acid gas dissolved in water will form an acidic solution to cause the corrosion of pipelines and equipment; Under the condition of low temperature, the saturated water vapor in natural gas may condense into free water, even combine with some small molecules to form ice crystals, These hydrates will accumulate in a large area, plug the pipeline, valves and equipment. Therefore, dehydration of natural gas is a very important part of natural gas purification. This is especially true for commercial natural gas, which is high acid gas or in need of long-distance transportation. In the paper, introduction the process flow of the TEG dehydration System and process calculation steps, which is based on basic Design of WC9-2/9-3/10-3 gas field＇s development project.