【Major Chemical Equipment】024 – Extra-large High-temperature Styrene Exhaust Compressor
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This post was last edited by Desert Fish on 2022-3-20 at 11:09. The past decade has been a period of rapid development in China’s chemical industry, with the emergence of many new processes, products, and equipment. China’s chemical processing equipment has also seen significant progress, which has contributed to the swift advancement of the petrochemical industry. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and localization of equipment. Everyone is welcome to share, discuss, and exchange ideas; let’s cheer for Made in China and support the development of chemical processing equipment! *********************************** As a key equipment in large-scale styrene plants, the exhaust screw compressor has long been a factor that has constrained the development of domestic technology for complete styrene production systems. The Office for the Localization of Major Equipment at Sinopec, in collaboration with Sinopec Shanghai Engineering Company, Sinopec Maoming Branch, and Institute 711, carried out the localization of large-scale high-temperature screw compressor units for styrene exhaust gas, utilizing Sinopec Maoming’s 400,000 tons per year crude pyrolysis gas-based ethylbenzene/styrene production project. After more than a year of effort, the project team completed the development of the unit. During this acceptance process, the experts witnessed on-site the temperature rise test and mechanical operation test of the screw compressor, and all parameters met the requirements for factory acceptance. Subsequently, the experts also heard reports on the key technical challenges related to this project, its implementation, manufacturing supervision, and testing, and unanimously agreed to approve it for release from the factory.
The 【Haichuan Equipment Guessing】 series is being updated continuously in 2022; all Haichuan community members are welcome to participate actively! https://bbs.hcbbs.com/thread-2079686-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post on the series 【Major Equipment in the Chemical Equipment Industry】 https://bbs.hcbbs.com/thread-3312079-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post discussing the components of cracking furnace equipment for 【Ethylene Cracking】 https://bbs.hcbbs.com/thread-3308724-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum)
In 1965, Shanghai Compressor Factory, Shanghai Third Compressor Factory, and Hangzhou Turbine Factory (later renamed Hangzhou Steam Turbine Factory) conducted exploratory work and research on screw compressors. Shanghai No. 3 Compressor Factory replicated and put into use at Quzhou Chemical Plant a 40/2 type screw compressor with a displacement of 40 m3/min and an exhaust pressure of 2 kilograms/cm2, using the \"reverse profiling method\" (that is, blades were made according to the shape of the rotor’s end face, in a direction opposite to that used for processing the actual rotor). This made the factory one of the earliest in China to produce screw compressors. In 1965, Beijing No.1 General Machinery Factory and Wuxi Compressor Factory each completed the trial production of a propane compressor with a displacement of 11.5 m3/min and a discharge pressure of 20 kg/cm2, as well as a D6.5-10/26～36 type hydrogen circulation compressor. Hangzhou Turbine Factory also produced a screw air compressor with an exhaust volume of 40 m3/min for the natural gas collection and transportation project in Daqing Oil Field. In addition, the Ministry of Machinery decided to develop a 6000 m3/h air separation unit to complement the metallurgical equipment imported by the Capital Steel Plant from Japan, and to trial-produce the LG63 type large screw air compressor with an exhaust volume of 38,200 m3/h; the Shanghai Compressor Factory was tasked with carrying out this trial production. In March 1968, the trial production of the LG63C×2—63D large-scale screw compressors was completed.
In collaboration with Xi’an Jiaotong University, and building on some preliminary work, the factory completed the \"Design Documentation for Milling Tools Used in the Machining of Screw Compressor Rotors\" in October of that year, which contributed to the development of screw compressors in China. The following year, in collaboration with the East China Institute of Electronic Computing Technology of the Chinese Academy of Sciences, a calculation program for the rotor shaping milling tool of the LG63 compressor was developed, completing the calculation of the tool’s cross-section. It also designed and manufactured a large screw machining machine weighing 30 tons, solving problems such as the machining of rotors with a diameter of Ф600. This series of efforts has created the conditions for the manufacturing of large screw compressors. Although some technical issues remain unresolved, it has accumulated experience in the manufacturing of large screw compressors in our country.