江西省天然气管网工程脱水装置技术改造

Technical transformation of dehydration device in Jiangxi Natural Gas Pipeline Network Engineering

江西省天然气一期管网工程CNG加气母站的分子筛再生后吸附能力无法恢复,导致天然气脱水后的含水量超出国家标准,影响了设备的平稳运行和对下游用户的正常供气。分析了脱水装置设计参数与工况参数之间存在的偏差,以及脱水装置工艺流程的缺陷。根据分析结果,将脱水装置的再生流程由双塔开式循环改造为单塔闭式减压循环。加气母站干燥器单塔吸附周期由改造前的5h增加至改造后的136h,吸附能力显著提高,同时降低了再生成本。该改造方案可为同行业类似问题的处理提供借鉴。(表2,图2,参5)

In the primary CNG filling station of phase 1 pipeline project of Jiangxi Natural Gas Co, Ltd., absorption capability ca nnot restore after molecular sieve regeneration so that water cut after the dehydration of natural gas exceeds the national standard, thus affecting steady operation of equipment and normal gas supply to downstream users. Deviation between design parameters and working parameters and technological process defects of the dehydration device are analyzed. In accordance with the analysis results, regeneration process of the dehydration device is transformed from two- tower open cycle to one-tower closed decompression cycle. After the transformation, one-tower adsorption cycle of dryer in the primary CNG filling station increases to 136 h from the previous 5 h, so that the adsorption capacity is significantly improved to reduce the regeneration costs. The transformation program can provide a reference to the processing of similar problems in the same industry. （2 Tables, 2 Figures, 5 References）