长距离输气管道工艺设计优化方法研究

发布时间：2018-01-17 03:19

本文关键词：长距离输气管道工艺设计优化方法研究　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来天然气的开发和使用呈现出快速增长的态势,但是因为天然气产地和天然气消费地之间通常距离较远,需要建设大量的长距离输气管道以满足输送任务的需求。长距离输气管道工程具有高风险、高投入和高技术的特点,有效、合理、快速的确定最优工艺设计方案,在管道的设计阶段可以节省大量的人力、财力。能够满足工艺要求的长距离输气管道工艺设计方案有很多个,但是每个设计方案在经济投资方面会产生很大的差异。如何通过合理的优化方法在众多设计方案中找到最优的工艺设计方案,是广大管道设计工作者必须面对的问题。首先,在相关设计规范和标准下,考虑工艺设计变量取值范围,建立工艺上可行的工艺设计方案集;其次,在上述工艺可行的设计方案集内,考虑输气管道工艺设计方案的经济性,建立经济上可行的工艺设计方案集;最后,考虑其它工艺影响因素,采用层次分析法,对已建的长距离输气管道工艺设计方案集进行综合评价,得到最优的工艺设计方案。本文研究内容和所得结论主要如下:(1)考虑长距离输气管道工艺设计流程特点,基于相关标准和设计规范,针对任务输量,确定管道管材、设计压力、压气站压比、管道管径等主要设计参数合理的选用范围,通过工艺设计计算分析,建立长距离输气管道工艺设计方案集。(2)针对所建立的长距离输气管道工艺设计方案集,考虑输气管道系统建设费用和运行费用两个方面,建立长距离输气管道经济模型,通过对工艺上可行的工艺设计方案集进行进一步的经济论证,得到工艺上可行、经济上合理的工艺设计方案集。(3)针对经过工艺和经济筛选的工艺设计方案集,考虑长距离输气管道压缩机站个数、首站压力等工艺参数的基础上,结合输气管道投资费用和运行费用特点,建立长距离输气管道层次评价结构,对长距离输气管道工艺设计方案集进行评价,求得最优工艺设计方案。(4)选择输量不同的三条管道作为验证实例,首先采用方案比选法建立长距离输气管道工艺设计方案集,然后采用经济约束条件筛选工艺设计方案集内的经济合理方案,最后采用层次分析法确定最优设计方案,将优选结果与实际建设方案相比较,验证本文优选方法具有可行性和实际应用价值。
[Abstract]:In recent years, the development and use of natural gas has shown a rapid growth trend, but because of the natural gas production and natural gas consumption area is usually a long distance. A large number of long-distance gas pipelines need to be built to meet the needs of transportation tasks. Long distance gas pipeline engineering has the characteristics of high risk, high investment and high technology, and is effective and reasonable. Rapid determination of the optimal process design, in the pipeline design phase can save a lot of manpower, financial resources, and can meet the requirements of the long distance gas pipeline process design plan there are many. However, each design scheme will have a great difference in economic investment. How to find the best process design scheme in many design schemes through reasonable optimization methods. It is a problem that most pipeline designers must face. Firstly, considering the range of process design variables, a feasible set of process planning schemes is established under the relevant design specifications and standards. Secondly, in the set of feasible design schemes mentioned above, considering the economy of the process design scheme of gas pipeline, the set of economically feasible process design schemes is established. Finally, considering other technological factors, AHP is used to evaluate the set of process design scheme of long distance gas pipeline. The main contents and conclusions of this paper are as follows: 1) considering the characteristics of long distance gas pipeline process design, based on the relevant standards and design specifications, according to the volume of the task. The reasonable selection range of the main design parameters, such as pipe material, design pressure, pressure ratio of gas pressure station, pipe diameter and so on, is determined, and the calculation and analysis of process design are carried out. In view of the set of long distance gas pipeline process design scheme, the construction cost and operation cost of gas pipeline system are considered. The economic model of long distance gas transmission pipeline is established, and the process feasibility is obtained by further economic demonstration on the set of feasible process design schemes. Economically reasonable process design plan set. (3) considering the number of long distance gas pipeline compressor stations, the first station pressure and other process parameters in view of the process design plan set through the process and economic screening. Combined with the characteristics of investment cost and operation cost of gas transmission pipeline, the hierarchical evaluation structure of long distance gas transmission pipeline is established, and the set of process design schemes for long distance gas transmission pipeline is evaluated. The optimal process planning scheme. 4) selecting three pipelines with different transportation capacity as an example. Firstly, the set of long distance gas pipeline process design schemes is established by the method of scheme comparison and selection. Then the economic constraints are used to select the economic and reasonable scheme in the process design plan. Finally, the AHP method is used to determine the optimal design scheme, and the optimal selection result is compared with the actual construction scheme. To verify the feasibility and practical application value of the optimal selection method in this paper.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE973.1

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