中亚天然气管道压气站运行能耗优化模拟计算

1. 中油国际管道公司;2. 中国石油天然气管道局投产运行公司

中亚天然气管道;压气站;高温天然气;开机组合;输量匹配;模拟;自耗气量

Simulation on compressor station operation of Trans-Asia Gas Pipeline based on gas consumption optimization
LIN Qi1, LOU Chen2, XIANG Yifan1, PAN Tao1, YANG Jinwei1, ZUO Dong1, YE Erbo1

1. SINO-Pipeline International Company Limited;2. Commissioning Operation Company of China Petroleum Pipeline Engineering Co. Ltd.

Trans-Asia Gas Pipeline, compressor station, high-temperature gas, compressor boot combination, throughput matching, simulation, gas consumption

备注

在长输天然气管道运行费用构成中,压气站自耗气费用成本占比50%以上,基于能耗最优的压气站运行优化具有重要意义。以中亚天然气管道加兹里压气站为例,针对该站场存在的高温天然气输送及不同输量与压缩机组匹配的特殊运行工况,借助SPS 仿真软件及历史运行数据,模拟计算了不同工况下自耗气量的变化规律,量化分析了不同工况所导致的额外自耗气量。模拟结果表明:压气站进站天然气温度每上升5 ℃,压缩机组自耗气量增幅6%;在一定的输量范围内,采用低效率的双机组运行模式,每天将增加1×104~3×104 m3 自耗气量。由此制定了基于月度输气计划压气站能耗优化的压缩机组匹配工艺方案,可为长输天然气管道压气站开展能耗优化提供参考。(图6表6,参[25]

Among the operating cost of long-distance natural gas pipeline, the gas consumption of compressor stations accounts for more than 50%. Therefore, it is of great significance to optimize the operation of compressor stations based on energy consumption optimization. In this paper, Gazli Compressor Station of Trans-Asia Gas Pipeline (GCS) was taken as an example. In view of its high-temperature gas transmission and special operating conditions with matched throughputs and compressor units, the changing laws of gas consumption under different operating conditions were simulated and calculated based on SPS simulation software and historical operation data. Then, the additional gas consumption caused by different working conditions was analyzed quantitatively. It is shown that the gas consumption of the compressor unit is increased by 6% if the natural gas temperature at the inlet of the compressor station rises by 5 ℃. In a certain range of throughput, daily gas consumption is increased by 1×104-3×104 m3 if the low-efficiency dual-unit operating mode is adopted. Finally, the compressor unit matching process scheme for optimizing the energy consumption of compressor station based on monthly gas transmission plan was formulated. The research results can provide reference for studying gas consumption optimization of compressor stations along the long-distance natural gas pipelines. (6 Figures, 6 Tables, 25 References)