Optimal pipe diameter design method for liquid-phase ethane conveying pipeline

Abstract

The invention discloses an optimal pipe diameter design method for a liquid-phase ethane conveying pipeline, and belongs to the technical field of natural gas pipeline design. The method comprises thesteps that 1, basic data of a liquid-phase ethane conveying pipeline are collected; 2, establishing an ethane conveying pipeline optimal pipe diameter design model which takes the lowest annual reduction cost of the liquid-phase ethane conveying pipeline as a target function and comprises ethane phase change constraints; 3, determining an optimization parameter and a feasible region thereof; 4, calculating design parameters of the liquid-phase ethane pipeline; 5, obtaining a target function value; and 6, changing the optimization parameters to obtain a target function value set, and obtaininga minimum value through economic comparison, so that the corresponding pipe diameter is the optimal pipe diameter. The design method of the liquid-phase ethane conveying pipeline has the advantages of being clear in calculation process, convenient to operate and high in calculation speed, and guidance is provided for safe, economical and efficient design and operation management of the liquid-phase ethane conveying pipeline.

Description

technical field [0001] The invention belongs to the technical field of natural gas pipeline design, and in particular relates to a method for designing an optimal pipe diameter of a liquid-phase ethane transmission pipeline. Background technique [0002] Ethane is an important chemical raw material, which can be used to synthesize ethylene, polyethylene and other products. For long-distance onshore transportation of large amounts of ethane, pipeline transportation is the most convenient and economical transportation method. At present, there are no design standards and specifications for liquid-phase ethane pipelines at home and abroad. There are few reports on the optimal diameter design of liquid-phase ethane pipelines. The design mainly refers to relevant standards for natural gas and petroleum product pipelines. [0003] The existing optimal diameter design method for natural gas and oil transmission pipelines is as follows: first step, according to the designed transmi...

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Problems solved by technology

[0005] The present invention provides a method for determining the optimal pipe diameter of liquid-phase ethane delivery pipelines by introducing ethane phase-change constraints based on the characteristics of easy phase transition of liquid-phase ethane, which overcomes the problem of optimal pipe diameters of existing natural gas and crude oil pipelines The design method cannot be applied to the design problem of liquid phase ethane transmission pipeline

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