提高北京天然气现有管网输气能力方法探讨

Methods to Improve the Transmission Capacity of Beijing Existing Natural Gas Pipeline Network

由于城市建设的快速发展,大中型城市普遍存在着"有限的土地资源与大量的天然气基础设施建设"相矛盾的现象,随着天然气需求量的增加,这一矛盾更为突出。如何利用现有管网设施提高管网输送能力,是目前亟待解决的问题。本文结合北京市天然气管网运行现状和未来天然气发展规划,系统分析了提高管网输气能力的方法。提出了提高管网输送能力的几种方法,如升压运行,中低压转换,扩大管径,源点增设,并行干管增设,连通线增设,成环改造等。最后,用统计理论的方法得到管线长度和天然气销售量回归方程,并分析了北京天然气管网利用率。本文研究结果,可为城市燃气管网改造提供科学的依据。

Due to the rapid development of urban construction.There is a contradiction between limited land resources and a large number of natural gas infrastructures, this phenomenon is common in our large and medium-sized cities. And with the increasing demand of natural gas the contradiction is becoming more evident. The urgent problem to solve is how to u- tilize existing gas facilities to improve the transmission capacity in natural gas pipeline network. According to both present running status and future development planning about Beijing natural gas distributing system, methods of improving pipe network transmission capacity are systemically analyzed in this paper. Such as improving the pipeline operating pressure, transferring low pressure to medium pressure, enlarging pipe diameter, adding source point, increasing parallel lines, con- necting the near mainstay pipeline, making into ring pipe network ,etc. Lastly in accordance with mathematic and statistic methods, the linear equation of total pipeline length and natural gas sales volume is obtained and utilization factor of gas distributing system is analyzed too. Results from this paper can serve as a scientific reference for gas distributing system alteration.