混氫天然氣管道安全設(shè)計(jì)要點(diǎn)探討2021-03-26
Discussion on the Safety in Design of Hydrogen Blended Natural Gas Pipelines
作者單位：1. 中國石油工程建設(shè)有限公司西南分公司,2. 河南省發(fā)展燃?xì)庥邢薰?3. 中國石油西南油氣田分公司輸氣管理處4. 西南石油大學(xué)石油與天然氣工程學(xué)院
中文關(guān)鍵字：混氫天然氣;管道;安全設(shè)計(jì);探討
英文關(guān)鍵字：Hydrogen-mixed gas; Pipeline; Safety engineering design; Explore
中文摘要：
H2作為新能源重要發(fā)展方向之一,與傳統(tǒng)化石燃料相比,具有熱值高、產(chǎn)物不污染環(huán)境、來源廣泛、可再生的顯著優(yōu)勢,被稱為未來的清潔能源,將成為人類未來解決日益嚴(yán)峻的能源和環(huán)境問題的一條新途徑。H2運(yùn)輸是氫能利用的重要環(huán)節(jié),采用可靠的管道輸送方式連接H2氣源與目標(biāo)用戶,是優(yōu)化能源消耗、推動(dòng)氫能利用的關(guān)鍵。相比于高純氫管道,混氫天然氣管道具有資源調(diào)配靈活、資源利用率高的特點(diǎn),可供上游H2產(chǎn)品摻混進(jìn)入天然氣管道,實(shí)現(xiàn)同管遠(yuǎn)程輸送,這將是未來較為熱門的H2資源運(yùn)輸和利用途徑。H2作為量子氣體,難壓縮、難混合、難保存,同時(shí)H2易泄漏,且爆炸極限寬(4%～75%),摻入天然氣后,介質(zhì)特性更復(fù)雜,必須重點(diǎn)關(guān)注其安全設(shè)計(jì)問題?；贖2物理特性,結(jié)合混氫天然氣存在的問題分析,對(duì)比常規(guī)天然氣管道安全設(shè)計(jì)問題,深入剖析混氫天然氣管道的安全設(shè)計(jì)要點(diǎn),以期進(jìn)一步揭示相關(guān)規(guī)律。研究結(jié)果表明:設(shè)備與管道停運(yùn)后混氫天然氣將出現(xiàn)較明顯的組分分層現(xiàn)象;混氫天然氣管道放空設(shè)計(jì)需避免介質(zhì)自燃問題;混氫天然氣管道安全設(shè)計(jì)尚需開展大量工作。研究成果可為混氫天然氣管道安全設(shè)計(jì)提供相關(guān)參考。
英文摘要：
As one of the important development directions of new energy resources, hydrogen, compared with traditional fossil fuels, has the significant advantage of high calorific value, pollution free, wide source of supply and is renewable. It is called clean energy of the future and will become a new way for mankind to deal with the worsening energy issues and environmental situations in the future. Hydrogen transportation is an important part of hydrogen energy utilization. The use of reliable pipeline transportation to connect hydrogen gas sources with target users is the key to optimize energy consumption and promote the utilization of hydrogen energy. Compared with the high-purity hydrogen pipeline, the hydrogen blended natural gas pipeline has the characteristics of flexible resource allocation and high resource utilization rate, which can be used for the blending of upstream hydrogen products into adjacent natural gas pipelines and realize the transportation of multiple media in the same pipeline. This will be a popular way to transport and utilize H2 resources in the future. Hydrogen, as a quantum gas, is difficult to compress, mix, and store. At the same time, hydrogen leaks easily, and has a wide range of explosion limit (4% to 75%). When natural gas is blended with hydrogen, the mixture is much more complex and attention must be paid to its safety in design. Based on the physical properties of hydrogen, combined with the analysis of the existing issues of hydrogen-blended natural gas, this paper compares the safety in design with conventional natural gas pipeline, and provides an in-depth analysis for the safety in design of hydrogen-blended gas pipelines, in order to further reveal the laws of nature. The research results show that there will be obvious component stratification upon the shutdown of hydrogen blended natural gas distribution equipment and pipelines; the design of the venting of the hydrogen-blended natural gas pipeline shall have to avoid auto ignition of the vented gas. There is still much work to be done on the safety in design of hydrogen blended natural gas pipelines. The results of this study can provide relevant references for the safety in design of hydrogen-blended natural gas pipelines.
