In the wave of energy structure transformation towards green and low-carbon, the precise and efficient utilization of natural gas is crucial. The real-time online monitoring of its components and calorific value is a core link directly related to product quality, production safety, and economic benefits.

For many years, the analytical instrument market for this critical link has been almost importedThe chromatograph monopolizes and has long suffered from many pain points such as slow response, complex preprocessing, and high consumable costs. In addition, natural gas monitoring technology also faces multiple challenges, including complex gas composition, rapid reaction processes, complex operating conditions, and high safety risks. Faced with the call of the country to accelerate the localization of instruments and the inherent demand for industrial upgrading, the market urgently needs a domestically produced analytical instrument that can break through technological barriers.

Technological breakthrough: Domestic practice of laser Raman spectroscopy

Sifang Instrument is facing industry challenges, and its independently developed LRGA-6000 laser Raman spectroscopy gas analyzer provides a solid domestic solution with original technology.

Four party instrument LRGA-6000 laser Raman spectroscopy gas analyzer

•Principle advantage, innate precisionBased on the laser Raman scattering effect, each gas has a "molecular fingerprint spectrum". LRGA-6000 can identify these Raman spectra without complex physical separation or chemical conversion, and can achieve in-situ, synchronous, and real-time analysis of multiple components, fundamentally overcoming the inherent limitations of chromatographic technology processes, infrared technology's inability to detect diatomic molecules such as H2 and N2, and other technologies.

•Hardcore parameters, definitionstandard：

①Full component measurement: Can measure simultaneously H2、N2、O2、CO、CO2、H2S、NO、CH4、C2H2、C2H4、C2H6、C3H6、C3H8、i-C4H8、n-C4H8、i-C4H10、n-C4H10、CH3NO2 Waiting for more than 20 types of gases, covering the analysis needs of various fields and components.

②Accuracy and response speedAccuracy up to ± 1% F.S; The response time T90 ≤ 30s is much faster than traditional chromatographs that are measured in minutes.

③environmental adaptabilityThe explosion-proof rating of the whole machine is Ex d Ⅱ C T4, and the protection level is IP65. It can operate stably in harsh environments of 5-60 ℃ and 95% RH without complex pretreatment.

•No consumables design, economical and efficientThe biggest advantage is that LRGA-6000 does not require consumables such as carrier gas and chromatographic columns during the analysis process, significantly reducing the long-term operational cost burden for users.

Practical verification: CNOOC competes with imported equipment on site

At the terminal processing plant of CNOOC (China) Co., Ltd. Hainan Branch, strict comparative tests were conducted between LRGA-6000 and an imported chromatographic analyzer.

①Basic performance compaction:

②The measured data has transcendence：

Multiple sets of on-site data show that the measurement results of the LRGA-6000 instrument from Sifang are highly consistent with the imported equipment, and the data obtained from multiple measurements are stable and consistent. More importantly, LRGA-6000 provided stable and accurate readings on components such as ethane (C2H6) and n-butane (n-C4H10), while the imported chromatograph failed to effectively detect them (reading 0). Obviously, the laser Raman spectrometer gas analyzer will be able to more accurately reflect the gas composition.

③ The direct reading function of calorific value makes decision-making more efficient：

The laser Raman spectroscopy gas analyzer of Sifang Instrument has a built-in intelligent conversion module for calorific value, which can automatically and continuously output the real-time calorific value of the measured gas based on the concentration of each component measured in real time. This provides a direct and reliable basis for process optimization and energy settlement, which is a function that traditional chromatography cannot achieve.

Providing value to customers: not just as a replacement, but also as an upgrade

CNOOC ultimately chose Sifang Instrument based on value considerations:

• technological autonomyBreaking down import technology barriers and ensuring supply chain security.

• cost reduction and efficiency improvementNon consumable design significantly reduces lifecycle maintenance costs; Quick response helps to regulate production in a more timely manner.

• safe and reliableHigh explosion-proof rating and remote monitoring capability add security to high-risk environments such as offshore platforms.

This cooperation is not only a successful application of domestically produced analytical instruments in energy enterprises, but also a practical proof that Chinese manufacturing has the ability to achieve the transition from "following" to "running in parallel" and even in the field of scientific instruments“transcendThe leap.

Do you want to know more about how laser Raman technology can solve monitoring problems in other industries such as chemical engineering and metallurgy?Follow us, the "Raman Practical Record" series will continue to reveal for you!