[Chemical Equipment Powerful Country and Important Equipment] 028-Chinese Shipbuilding Industry Corporation No. 711 Institute localized large-scale fully welded plate heat exchanger

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The past ten years have been an era of great development for China's chemical industry. The emergence of many new processes, new products, and new equipment has also led to a great development in my country's chemical equipment, which has also promoted the rapid development of the petrochemical industry. Here we have collected and sorted out some of the achievements and breakthroughs made by my country's equipment companies in the large-scale and localization of equipment. Welcome everyone to share, discuss, and exchange, cheer for Made in China, and cheer for chemical equipment! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Breakthrough in the localization of fully welded plate heat exchangers 2019-10-18 14:56 Recently, news came from Sinopec Luoyang Branch that all indicators of the 10 domestic fully welded plate heat exchangers used in the aromatic low-temperature heat utilization project for the first time met the design requirements. Under full load operation, the waste heat of the top gas of the extraction liquid tower, toluene tower, heavy aromatics tower, etc. can be taken out through the heat medium water medium, totaling 28.3MW. This part of the heat is used for deoxygenated water and desalted water in the heating device, which can effectively utilize the low-temperature heat energy of the aromatics device and reduce the energy consumption of the device. It is reported that low-temperature heat utilization of media such as raffinate and extract liquid at the top of the aromatics unit has always been a global problem. The main reason is that the isomerization catalyst and adsorbent have strict restrictions on the water content. Once the heat exchanger leaks, the isomerization catalyst and adsorbent may be damaged. Therefore, whether low-pressure steam or hot water recovery is used, there are extremely high requirements for the reliability of the heat exchanger. At the same time, because it is in the field of heat recovery, the heat exchanger must also have the characteristics of high heat exchange efficiency, small footprint, and small size. According to Luan Huibao, director of the heat exchanger project department of the 711 Institute of China Shipbuilding Industry Corporation, the institute began to work on the localization of fully welded plate heat exchangers in 2011. After years of technical research, there are currently more than 400 units of equipment in production and operation, and the materials range covers stainless steel, titanium, Hastelloy, etc. In the field of refining and chemical industry, domestically produced heat exchangers have also been replaced under harsh conditions of high corrosion and high pressure, such as atmospheric and vacuum distillation and natural gas purification. The high-efficiency heat exchanger used in this aromatic hydrocarbon project is several times higher in heat transfer efficiency than the traditional shell-and-tube heat exchanger, and improves the heat recovery efficiency. ； Laser welding technology is used between boards, with a design life of 15 years ； Each heat exchanger undergoes strict helium leak detection before leaving the factory, and the leakage index is lower than 10-7Pam3/s3.