Styrene is a synthetic polymer material
According to reports, styrene is an important raw material for the synthesis of high polymer materials and a fundamental product in the petrochemical industry. It is also one of the most commonly encountered compounds by humans. From space shuttles to sports shoe soles, from medical devices to commodity packaging, styrene is indispensable.
It is reported that in the field of large-scale styrene plant manufacturing in China, tail gas screw compressors have been a long-standing factor restricting the development of related complete equipment technology. Therefore, with the support of Sinopec’s Shanghai Engineering Company, as well as relying on Maoming Petrochemical’s 400,000 tons/year crude pyrolysis gas-to-ethylene/benzene project, China Petroleum & Chemical Corporation (Sinopec) Major Equipment Localization Office has carried out domestication work on large-scale high-temperature styrene tail gas screw compressor units. After more than a year of research and development efforts by the project team, they successfully completed the unit’s development tasks.
During this acceptance work process, various tests such as screw compressor temperature rise test and mechanical operation test were conducted on this unit. All indicators met the requirements for factory acceptance. Subsequently, experts from the acceptance committee listened to reports on key technical breakthroughs for this project as well as information regarding project execution supervision and testing. They unanimously agreed to pass the factory acceptance.
The successful development of this unit will fill a gap in domestic production and break through import monopolies. It holds significant importance in reducing energy consumption levels for domestically produced process packages.
Pyrolysis gas compressor
Wanhua Chemical (Sichuan) Co., Ltd., and China Chengda Engineering Co., Ltd. were successfully put into operation in Meishan. All operating indicators meet or exceed the design
requirements, marking the successful domestic replacement of acetylene screw compressors.
The cracked gas compressor plays a connecting role, responsible for transporting cracked gas containing acetylene and increasing the gas pressure to
1.1MPaA to ensure the purification effect of the downstream scrubber. As the heart equipment of the entire process, the reliability of the cracked gas compressor is an important
factor affecting the continuous and smooth operation of the device.
The circulating gas compressor is the core equipment in the acetylene enrichment process. During the desorption process of acetylene-rich NMP solution, this equipment can enable the
acetylene desorption tower pressure to reach and maintain a high vacuum degree, ensuring that the partial pressure in the tower is always within a safe range. At the same time, it has the function of improving
the solution desorption effect and realizing the circulation absorption of desorbed gas, thereby ensuring that the acetylene product yield and concentration meet the downstream synthesis
requirements.
The successful operation of the screw compressor of the acetylene unit breaks the foreign monopoly, is of great significance to ensuring the safety of the industrial chain and supply
chain, and lays the foundation for promoting the rapid development of the domestic degradable plastics industry chain.