Breakthrough gas on-line chromatographic analysis technology of ethylene cracker in China has made a breakthrough. The research and development and service of the online Chromatography Analysis System of Ethylene Cracker, which was jointly undertaken by Tianhua Chemical Machinery and Automation Research and Design Institute and Yangzi Petrochemical Company, was approved by the Sinopec Group in Beijing.
The stable operation of the on-line chromatographic analyzer can provide important control data for optimizing ethylene production and increasing the ethylene yield. It is one of the key process parameters of the ethylene plant. According to reports, this technology is aimed at the unstable operation of the cracked gas on-line chromatograph analyzer in petrochemical plants and the problem of inaccurate sampling data. Based on the original sampler, it firstly created the secondary cyclone separation technology, which enabled the analysis of sample gas after two cyclone separations. Achieve a good oil and gas separation effect to ensure the long-term stable operation of the analyzer.
The use of new technologies makes the analytical measurement results of the online chromatograph more accurate and stable. At the same time, the maintenance workload of the entire analysis system is greatly reduced, which effectively reduces the operational risk of the ethylene combined device. The key technology in this achievement, the vortex refrigerant oil mist separation method, has applied for a national invention patent.
At present, the on-line chromatograph analyzers of 10 ethylene cracking furnaces that have been included in the research plan are stable and the data analysis is accurate. The requirements for crack depth control are met, and the success rate of research is 100%.
The on-line analysis of ethylene cracked gas is performed on-line analysis of pyrolysis gas produced from naphtha, light naphtha, atmospheric diesel, decompressed diesel, hydrogenated tail gas, ethane, liquefied petroleum gas, etc. as raw materials. The yield of pyrolysis feedstocks converted to pyrolysis products, ethylene, propylene, and butadiene, was measured as the effect of the cracking process.
The stable operation of the on-line chromatographic analyzer can provide important control data for optimizing ethylene production and increasing the ethylene yield. It is one of the key process parameters of the ethylene plant. According to reports, this technology is aimed at the unstable operation of the cracked gas on-line chromatograph analyzer in petrochemical plants and the problem of inaccurate sampling data. Based on the original sampler, it firstly created the secondary cyclone separation technology, which enabled the analysis of sample gas after two cyclone separations. Achieve a good oil and gas separation effect to ensure the long-term stable operation of the analyzer.
The use of new technologies makes the analytical measurement results of the online chromatograph more accurate and stable. At the same time, the maintenance workload of the entire analysis system is greatly reduced, which effectively reduces the operational risk of the ethylene combined device. The key technology in this achievement, the vortex refrigerant oil mist separation method, has applied for a national invention patent.
At present, the on-line chromatograph analyzers of 10 ethylene cracking furnaces that have been included in the research plan are stable and the data analysis is accurate. The requirements for crack depth control are met, and the success rate of research is 100%.
The on-line analysis of ethylene cracked gas is performed on-line analysis of pyrolysis gas produced from naphtha, light naphtha, atmospheric diesel, decompressed diesel, hydrogenated tail gas, ethane, liquefied petroleum gas, etc. as raw materials. The yield of pyrolysis feedstocks converted to pyrolysis products, ethylene, propylene, and butadiene, was measured as the effect of the cracking process.
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