Rapid simulation method of leakage of high-sulfur natural gas gathering and transportation device for marine gas field

Abstract

The invention discloses a rapid simulation method of leakage of a high-sulfur natural gas gathering and transportation device for a marine gas field. Through analysis of leakage and diffusion distribution laws of high-sulfur natural gas in a densely populated area and optimization of a Gaussian diffusion model parameter selection method, a leakage and diffusion simulation procedure for sulfur-containing natural gas in a gathering and transportation pipeline and natural gas contained in a desulfurization device in a purification plant is acquired, and the gas leakage and diffusion result is rapidly simulated. A Gaussian model is selected, the influences of the ground roughness, the atmospheric stability and the leakage amount on gas leakage and diffusion are sufficiently considered, related parameters are corrected in combination with surroundings of a well field, the leakage and diffusion result under the four conditions of leakage of a sulfur-containing natural gas gathering and transportation pipeline, leakage of hydrogen-sulfide-containing pregnant solutions of the desulfurization device in the purification plant, leakage of hydrogen-sulfide-containing pregnant solutions of pipelines and gas leakage of pipelines of a station is rapidly and quantitatively simulated, and the longest distance that hydrogen sulfide with the concentration being 100 ppm and 1,000 ppm can reach after leakage and diffusion is obtained.

Description

technical field [0001] The invention belongs to the technical field of gas leakage and diffusion, and in particular relates to a rapid simulation method for leakage of a high-sulfur natural gas gathering and transportation device in a marine gas field. Background technique [0002] In order to reduce the leakage accidents of gathering pipelines or desulfurization devices, it is of great significance for accident emergency rescue to realize the rapid simulation of gas leakage and diffusion consequences and determine the public safety protection distance. Foreign scholars have proposed many gas diffusion models and carried out a large number of wind tunnel tests. Gaussian model, Sutton model, BM model, and FEM3 model are some of the more classic gas diffusion models (Sambo et al., 2011). The Gaussian model is the earliest developed and most widely used mathematical model of pipeline gas leakage and diffusion process. It is based on statistical methods to investigate the mass f...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a rapid simulation method for leakage of high-sulfur natural gas gathering and transportation devices in marine gas fields, aiming to solve the existing gas diffusion methods that focus on the influence of wind speed, wind direction, medium leakage pressure, etc. on gas leakage and diffusion. Little attention has been paid to the impact of complex terrain and other factors on the spread of gas leaks, resulting in the inability to accurately determine the safe protection distance after gas leaks and reducing rescue efficiency

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