【作者】 孙浩；

【导师】 马小明； 杨青；

【作者基本信息】 华南理工大学 ， 机械工程， 2011， 硕士

【摘要】 目前,广州市天然气利用事业正处于多气源进入、多气源交汇的关键性时期。除大鹏LNG项目以外,未来筹建或建设之中的广州市天然气气源项目还有珠海高栏港LNG站、西气东输二线工程、川气东送工程、海气登陆工程等。多路气源的进入能够对广州市天然气供应的可靠性提供非常有力的条件,如何合理有效的利用好多路气源,构建起安全可靠、经济合理的天然气高压输储配系统,对于关乎国计民生的城市能源安全而言至关重要。这就对城市天然气高压主干系统设计的科学性、合理性提出了很高的要求,需要我们对高压系统进行动态模拟与分析,科学预测现有及未来管网的运行稳定性。本研究内容将以广州市天然气市场调研与预测研究成果作为基础气量负荷依据,采用国外管网动态模拟软件,对广州市现有和规划高压管网工况模拟计算并优化,确定天然气高压管网的压力级制、管道管径以及门站、调压站设计边界条件等相关技术参数,研究分析高压管网的运营可靠性,探寻调峰应急气源的解决办法,以及事故工况下高压系统的应急能力,同时对今后的进一步研究提出建议。在对广州市天然气高压系统的分析过程中,先采用正常工况下的静态模拟数据,判断其是否满足各用户用气压力需求作为前提;然后对各场站的供气量进行合理的分配,模拟计算出高峰日24小时内各场站的压力、流量随时间变化的曲线,判断整个系统在正常供气条件下能否满足小时调峰量;最后通过事故条件的假设,模拟出在其中一路气源停气的情况下,另外两路气源的补缺能否适应于整个管网系统的供气需求。本文通过分析研究得出:广州市在近、远期供气规模分别为42亿和60亿标准立方米的预期下,其已建和拟建高压管网系统(含321公里高压管线、8座门站、12座调压站)能够满足各类用户的用气需求,同时利用该套高压管网系统自身的储气规模能够解决城市的小时调峰量,无需另建其它储气设施。此外,该套系统即使在其中一路气源断供的情况下,利用其它两路气源的补充,仍可保证用户用气不受影响。更多还原

【Abstract】 At present, Guangzhou natural gas utilization industry is in the critical period of more air entry and the multi-gas convergence. In addition to Dapeng LNG project, future preparation or construction of natural gas supply projects in Guangzhou, there have Zhuhai Gaolan Port LNG station, West-East Gas Pipeline Project, East Gas Transmission Project, air-sea landing projects.Multiple sources of gas entry provide very favorable conditions to the reliability of gas supply for Guangzhou city. How reasonable and effective way to use a lot of gas supply, build safe, reliable, economical storage and distribution of natural gas high-voltage transmission system, for about the national economy urban energy security is critical. It put forward high demand for the scientific and rational of this high pressure urban gas main system design, we need the high pressure system dynamic simulation and analysis, scientific forecast of existing and future pipeline network operation stability.The study will be the Guangzhou market research and forecasting of natural gas research results as the basis of basic gas load, the use of foreign pipe network dynamic simulation software, in Guangzhou the existing and planned high-pressure pipe network simulation and optimization of operating conditions to determine the high-pressure natural gas pipeline network pressure-tier system, pipe diameter and gate stations, regulator stations and other related technical boundary conditions, design parameters, study and analyze the reliability of high-pressure pipeline network operations, emergency gas supply peaking to explore solutions, and high-pressure system accident conditions emergency response capacity, and future recommendations for further research.In the analysis process of Guangzhou natural gas high-pressure system, we first use the normal condition of the static simulation data, to determine whether the gas pressure to meet the needs of all users as a prerequisite; then make reasonable allocation to the gas station’s supply, simulation calculate the peak day of each station within 24 hours of pressure, flow rate versus time cuve, determine the system under normal conditions of supply can meet the peak hour volume;finally through the assumption by accident conditions, to simulate in which a road gas source gas stop condition, another two source supplement can adapt to the network system of gas supply demand.The paper analyzes research drawn:Guangzhou City in the past, the scaleof long-term gas supply 4.2 billion, respectively, and 60 million standard cubic meters is expected. Its construction and proposed high pressure pipeline system (including the 321 km high pressure pipeline, 8 gate station, 12 value station ) can meet all kinds of users demand for gas, while using the set of high pressure pipe system itself can solve the problem of city gas storage scale of hours peak volume, without the other other storage facilities. In addition, the system even in one air source is cut for the circumstances, use other two air supplement, can ensure that users with gas is not affected.更多还原