天然气总硫含量在线检测标准方法及其相关技术

尽管目前国内检测总硫含量的诸多方法都准确可靠,但仍存在检测频率低、周期长、不能及时给出检测结果等不足。为此,在总结天然气总硫含量检测相关标准的基础上,探讨了天然气总硫含量在线检测标准方法及其相关技术,确定了上述标准方法和相关技术的原理,进而提出了制订我国天然气硫化合物和总硫含量在线检测标准方法的建议。结论认为:(1)实现天然气总硫含量在线检测是未来发展的必然趋势;(2)鉴于国内尚无天然气总硫含量在线测定方法标准,建议借鉴和参考ASTM D7165-10(2015)《气相色谱法在线测定气态燃料中的硫含量》、ASTM D7166-10(2015)《用总硫分析仪在线测定气态燃料中的硫含量》和ASTM D7493—2014《气相色谱和电化学检测法在线测定天然气和气体燃料中硫化合物》等国外标准,适时制订我国的相应标准。

Standard methods and related techniques for on-line detection of the total sulfur contents in natural gas

At present, many domestic total sulfur detection methods are accurate and reliable, but they are disadvantageous with a low detection frequency, a long detection period and delayed work. In this paper, the standards of the total sulfur content detection of naturalgas were reviewed. Then, the standard methods and related techniques for on-line detection of the total sulfur contents in natural gas were discussed, and their principles were figured out. And finally, it was recommended to develop a domestic on-line detection standard method for sulfur compounds and the total sulfur contents in natural gas. It is concluded that on-line total sulfur content detection is the inevitable development trend in the future; and that there is neither methods nor standards at home available for on-line detection of the total sulfur contents in natural gas, so it is recommended to timely formulate a national standard correspondingly by referring to foreign standards, e.g. Standard Practice for Gas Chromatograph based On-line/At-line Analysis for Sulfur Content of Gaseous Fuels (ASTM D7165-10(2015), Standard Practice for Total Sulfur Analyzer based On-line/At-line Analysis for Sulfur Content of Gaseous Fuels (ASTM D7166-10(2015)), and Standard Test Method for Online Measurement of Sulfur Compounds in Natural Gas Gaseous Fuels by Gas Chromatographand Electrochemical Detection (ASTM D7493-2014).