Focus on the 10-year layout of Sifang Optoelectronics Laser Spectroscopy Technology to boost the localization of high-end gas analysis instruments

Sifang Optoelectronics has been focusing on the research and development and industrialization of gas sensors and high-end gas analysis instruments for a long time, and has gradually established gas sensors including infrared, ultraviolet, thermal conductivity, laser Raman, TDLAS, ultrasonic, electrochemistry, MEMS metal oxide semiconductor and other principles.
technology platform
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Today, more than 60 years after the birth of the first laser, with the rapid development of various technologies such as laser light source, detection technology, experimental equipment and data processing, laser spectroscopy technology, as the core technology in the field of microscopic perception, has become an important technology in physics, chemistry, It is an important means to study the interaction of light and matter in the fields of biology, environment and astronomy.
It plays an irreplaceable role from basic laboratory research to the front line of application in various fields
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Raman spectroscopy technology has long been laid out, breaking through the bottleneck of industrial process gas analysis technology
 

In the field of industrial process gas monitoring, gas analyzers based on the principles of Fourier transform infrared (FITR), mass spectrometry (MS), and gas chromatography (GC) have their own advantages
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Fourier infrared technology is difficult for a gas chamber to be suitable for different ranges, and it cannot analyze H2, O2, N2 or even different hydrocarbons; mass spectrometry analysis technology has very low recognition for gas molecules of the same mass; gas chromatography analysis requires carrier gas , for different types of gases, different separation columns need to be switched
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Thanks to the popularity of laser technology and the emergence of various high-precision spectral analysis modules, laser Raman spectroscopy gas analysis technology has developed rapidly
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This product is mainly positioned in the high-end market of industrial processes such as oil and natural gas, shale gas, petrochemical, and large-scale coal chemical industry
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　　Shi Jingping, deputy general manager and senior engineer of Sifang Optoelectronics, introduced to the reporter: With the improvement of China's requirements for the localization of large-scale energy equipment, in response to the import substitution demand in the field of high-end gas analysis instruments, in order to speed up the solution of laser Raman spectroscopy gas analyzers in different industries As early as 2012, the company started the research on laser Raman spectroscopy gas analyzers, and as the lead unit implemented the national major scientific instrument and equipment development project "R&D and application of laser Raman spectroscopy gas analysis instruments"
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Through the development of special research and development, Sifang Optoelectronics has formed technologies including optical path and spectral analysis, Raman signal enhancement, Raman analysis measurement and control software, intelligent algorithms, etc.
, to solve the impact of fluctuations in external factors such as laser power, temperature, and pressure on measurement accuracy.
problem
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Through the technological breakthrough of Raman signal enhancement and the self-developed Raman spectroscopy analysis module with wide spectral range, Sifang Photoelectric Laser Raman Spectroscopy Gas Analyzer can meet the requirements of rapid and synchronous analysis of natural gas multi-components
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The analysis time has been shortened from 100 seconds to tens of minutes in the original industry to 10 seconds, an increase of more than 10 times; it can quickly measure CH4, C2H6, C2H4, C2H2, C3H8, C3H6, C4+, CO, CO2, H2, O2, N2, More than ten kinds of gases such as H2S, H2O, CH3OH, CH3-NO, NO, etc.
, can be used to solve the composition of natural gas shale gas, coal gasification, etc.
The industry difficulties of on-line monitoring of multi-component gas in industrial processes such as blast furnace converter coke oven and petroleum refining
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Figure 1: Sifang Photoelectric Laser Raman Spectroscopy Gas Analyzer
 

(Left: Laboratory desktop analyzer Right: Online explosion-proof analysis system)

 

　　Deeply cultivate TDLAS technology and build a highland for gas analysis industry
 

　　The availability of new lasers in the near-infrared and mid-infrared spectral regions has in turn driven the development of gas measurement sensors that are now widely used in industrial processes
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Molecules based on Tunable Diode Laser Absorption Spectroscopy (TDLAS), such as O2, CH4, H2O, CO, CO2, NH3, HCl, and HF, can be detected in situ with high selectivity and sensitivity in continuous, real-time operation
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Using sensitive detection techniques such as wavelength modulation spectroscopy (WMS), low ppb and ppm concentration measurements can typically be made with integration times of 1 second
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Detection limits can be improved by using decimation sampling and long multi-channel pools
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Currently TDLAS has become a proven technology for difficult measurement tasks in industrial processes, as it is compatible with high temperatures, high pressures, dust levels and corrosive media to determine gas concentration, temperature, velocity and pressure
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　　Shi Jingping said that building high-end gas analysis scientific instruments based on the Sifang photoelectric gas sensing technology platform is an important long-term strategy of the company
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The company has been deeply engaged in the research of laser TDLAS technology for many years, aiming to improve the professional ability based on laser spectrum measurement technology, further focus on the field of laboratory and process analysis, achieve sustainable business development, and provide industrial customers with product development and process design from production to production.
Full professional support for manufacturing and quality control
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　　Based on the independent research and development of TDLAS technology and lasers, the company has launched the GasTDL-3100 high-performance in-situ laser process gas analyzer.
It adopts a through-beam design and has a fast response time.
It is calculated in seconds in the in-situ measurement and can respond in time online The measured gas concentration of O2, CO, CO2 or CH4 avoids the time delay caused by sampling measurement; it has good adaptability in harsh measurement environments such as high temperature, high dust, high moisture, high corrosiveness, and high flow rate; gas The concentration is not easily distorted and the measurement accuracy is high
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It can be widely used in metallurgy, petrochemical, cement, electric power, environmental protection and other industries
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Figure 2: Sifang Optoelectronics TDLAS In Situ Laser Process Gas Analyzer
 

　　Relying on the accumulation of core laser technology, it is time to develop environmental gas monitoring
 

　　In the field of environmental monitoring flue gas emissions, based on the TDLAS tunable semiconductor laser absorption spectroscopy technology, the company has developed the GasTDL-3000 laser ammonia escape gas analyzer, which is suitable for online monitoring of the concentration of NH3 at the outlet of the denitration process.
Effectively reduce gas condensation loss, accurately respond to changes in escaped ammonia in real time, and provide reliable data support for environmental monitoring
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Figure 3: Sifang Optoelectronics TDLAS laser ammonia fugitive gas analyzer
 

　　"In recent years, TDLAS laser gas detection technology is also becoming a research hotspot to solve environmental problems such as coal mine gas and gas alarms due to its high efficiency, convenience and excellent versatility," Shi Jingping also told reporters that in the industrial field and daily life Methane has been widely used and is a typical flammable and explosive gas.
Timely and accurate detection plays a very important role in the safe operation of industrial and mining, personal safety and environmental protection
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TDLAS has all-optical design, high sensitivity, good electrical insulation, no electromagnetic interference, easy computer connection, and long-distance transmission.
It has unique advantages in extreme environments such as inflammable and explosive distribution centers and high temperatures.
A methane monitoring sensing technology
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At present, there are many kinds of methane sensors on the domestic and foreign markets.
Compared with the three methods of catalytic combustion and oxide semiconductor, the TDLAS tuning laser method is a relatively high-end methane measurement method.
Anti-interference, good stability, high environmental adaptability
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Recently, a laser methane gas sensor developed and launched by Sifang Optoelectronics is designed according to the standard requirements of pipe gallery, and can be used in environments with methane gas such as underground pipe gallery (network), underground well room petrochemical industry, gas production and transportation,
etc.

Figure 4: Sifang Photoelectric TDLAS Laser Methane Sensor
 

　　Ten years of accumulation, using laser spectroscopy technology to consolidate the market share of oxygen sensors for high-end medical ventilators
 

　　Sifang Optoelectronics adheres to the "1+3" development strategy, and has further improved its ability to transform achievements in the field of medical and health gas sensors.
At present, there are ultrasonic oxygen sensors for oxygen generators (replacing traditional zirconia oxygen sensors), laser oxygen sensors (replacing electrochemical and paramagnetic oxygen sensors) sensor), ultrasonic pulmonary function tester,
etc.

 

　　Oxygen sensor is an important key component of ventilator and anesthesia machine.
It is necessary to develop high-performance medical oxygen sensor and break the technological monopoly of foreign mainstream ventilator companies and foreign sensor suppliers.
It is the real localization of high-end medical ventilator and anesthesia machine.
necessary conditions
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At present, the oxygen sensor for ventilator mainly adopts electrochemical and paramagnetic measurement of oxygen concentration in China.
The former has a short service life and usually needs to be replaced after one year of use.
Gas pressure is more sensitive and requires pressure compensation
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　　In view of the defects and technical difficulties of the current oxygen sensor for ventilator, based on the principle of TDLAS tunable laser spectroscopy technology, Sifang Optoelectronics focuses on laser selection and packaging technology, oxygen sensor temperature control and drive circuit design, fast response micro-small air chamber design and Research on signal demodulation and algorithm processing, etc.
, to develop a laser oxygen sensor with high precision, high stability and fast response.
Autonomous and controllable
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Figure 5: Sifang Photoelectric Fast Laser Oxygen Sensor
 

　　write at the end
 

　　Sifang Optoelectronics has long been focusing on the R&D and industrialization of gas sensors and high-end gas analysis instruments.
Relying on the two technology platforms of the Provincial Technology Center and Hubei Gas Instrumentation Engineering Center, Sifang Optoelectronics actively integrates into the national technology innovation system, and has successively won the Ministry of Science and Technology of the People's Republic of China.
Supported by the key projects of the Innovation Fund, the National Major Scientific Instrument Project, the Internet of Things Development Project of the Ministry of Industry and Information Technology, the Hubei Province Major Technological Innovation Project, and the Wuhan City Major Scientific and Technological Achievement Transformation Project, etc.
The gas sensor technology platform based on the principles of Raman, TDLAS, ultrasonic, electrochemistry, MEMS metal oxide semiconductor, etc.
This platform provides a strong driving force for the localization of Sifang Optoelectronics' high-end gas analysis instruments
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The latest development of gas analysis technologies such as laser Raman spectroscopy, tunable semiconductor laser absorption spectroscopy TDLAS, etc.
, and with the gas analysis instrument technology of infrared, thermal conductivity, paramagnetic and other principles that the company has developed and accumulated over the years, Sifang Optoelectronics has formed China's own independent knowledge The high-end and mid-end complete gas analysis instrument application solutions with high property rights will vigorously promote the localization of high-end equipment in national strategic industries such as iron and steel metallurgy, coal chemical industry, petroleum refining and chemical industry, and natural gas, as well as in the fields of medical and health care
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　　Original title: FocusThe ten-year layout of Sifang Optoelectronics laser spectroscopy technology boosts the localization of high-end gas analysis instruments