文23储气库增压系统性能模拟及优化研究

A Study on Performance Simulation and Optimization of Pressurization System of Wen 23 Gas Storage

孙建华 周军 彭井宏 肖瑶

SUNJianhua ZHOUJun PENGJinghong XIAOYao

国家管网集团中原储气库有限责任公司, 河南 濮阳 457000 西南石油大学石油与天然气工程学院, 四川 成都 610500

Zhongyuan Gas Storage Co. Ltd., PipeChina, Puyang, Henan 457000, China Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China

文23储气库是目前中国已投运的最大储气库之一，主要负责华北地区市场季节调峰和应急供气任务。以文23储气库注气增压系统为研究对象，以实现增压系统节能降耗和提高工艺水平为目标，建立了增压系统往复式压缩机性能模拟计算模型，并利用Java语言开发了相应的模拟计算程序。在此基础之上，针对增压系统所采用的3种厂家压缩机设备，分别开展了相同工况下各厂家压缩机性能对比模拟计算和工况参数变化对压缩机性能影响模拟计算。模拟计算发现，相同工况下厂家A压缩机具有最高的容积流量和单位能耗。此外，在参数变化对压缩机性能影响方面，一级进气压力升高1 MPa将导致单位能耗降低75 ${\rm {kW \cdot h}}$/(${\times 10^4} {{\rm {Nm}}^3}$)，末级排气压力升高1 MPa将导致单位能耗升高17 ${\rm {kW \cdot h}}$/(${\times 10^4} {{\rm {Nm}}^3}$)，一级和二级进气温度的升高则都将导致单位能耗的小幅度升高。根据模拟分析结果提出了相应的压缩机开机方案优化措施和压缩机工况参数优化措施。研究充分结合了文23储气库增压系统的实际运行特点，所获得的研究结果对储气库现场运行工艺具有重要的指导意义。

Wen 23 gas storage is one of the largest gas storages in China, and it is primarily responsible for seasonal peak shaving and emergency gas supply tasks in the North China market. Taking Wen 23 gas storage gas injection pressurization system as the research object, we aim to realize the energy saving and consumption reduction of the pressurization system and improve the process level. The simulation calculation model of the reciprocating compressor performance of the booster system is established, and the corresponding simulation calculation program is developed using Java language. On this basis, simulated calculations of the performance comparison of compressors of various manufacturers under the same working conditions and simulation calculations of the effect of changes in working conditions parameters on the compressor performance are carried out respectively. Through simulation calculations, it is found that the compressor of manufacturer A has the highest volume flow and unit energy consumption under the same working conditions. In addition, in terms of the effect of parameter changes on the performance of the compressor, an increase in the first-stage suction pressure of 1 MPa will cause a reduction in unit energy consumption of 75 ${\rm {kW \cdot h}}$/(${\times 10^4} {{\rm {Nm}}^3}$), an increase in the last-stage discharge pressure of 1 MPa will cause a increase in the unit energy consumption by 17 ${\rm {kW \cdot h}}$/(${\times 10^4} {{\rm {Nm}}^3}$), and the increase of the first and second suction temperature will cause a small increase in unit energy consumption. According to the simulation analysis results, corresponding measures for optimizing the compressor start-up plan and optimizing the compressor operating conditions parameters are proposed. The research fully combines the actual operating characteristics of the pressurization system of Wen 23 gas storage, and the obtained research results have important guiding significance for the on-site operation of the gas storage.

10.11885/j.issn.1674-5086.2020.06.09.03