Analysis For The High-pressure Gas System In Guangzhou

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.