China has become one of the few countries with the capability to independently develop one million tons of ethylene compressors
China Drying Network News Fushun Petrochemical 800,000 tons/year ethylene plant ethylene compressor revolutions up to 5890 rpm, vibration value of 15 microns, bearing temperature is lower than 75 °C, large ethylene core equipment - China's first independent intellectual property rights hundred The 10,000-ton ethylene compression unit was successfully tested at one time. This is another major progress made in the localization of the key technology of the million-ton ethylene compressor unit after the ethylene compressor turbine passed the single test on June 19. It marks that China has become one of the few countries with the capability to independently develop one million tons of ethylene compressors.
According to reports, the technical key of the ethylene refrigeration compressor unit is the serialization of the aerodynamic performance and thermal design of the compressor. Especially in the welding technology of low-temperature materials and low-temperature materials, there is no precedent for the design and manufacture of the whole machine at present. The domestic million-ton ethylene compressors are mostly imported equipment and are expensive.
In March 2006, the National Development and Reform Commission approved the construction of a one-million-ton ethylene project at Fushun Petrochemical. At the same time, it clearly defined the project as a domestically-relied project and required the domestically-built million-million-ton ethylene “three machines†as localization of petrochemical equipment. At the breakthrough, Fushun Petrochemical Co., Ltd. assumed the task of localizing the ethylene refrigeration compressors, and large-scale cracking furnaces, ethylene cold boxes, and spare parts for the “three-machine†rotors were all resolved domestically. The topics that must be addressed in the localization of ethylene compressors include: research on integration of materials, welding, and heat treatment processes, research on large-scale numerical control machining processes for ternary impellers, research on rotor assembly processes, and research on manufacturing processes of chassis.
In the following years, Shenyang Blower (Group) Co., Ltd., Hangzhou Steam Turbine Co., Ltd. and other units through independent development and cooperative manufacturing, selection of low-temperature materials and structural design, impeller welding and rotor assembly process, turbine flow section The key links and technologies such as calculation and control are used to tackle key issues and solve a number of key technologies in the development of ethylene compressors. They have accumulated experience in the design and manufacture of ethylene compressors and have achieved the conditions for localization and commitment of 1 million tons/year. The ethylene production capacity of the ethylene compressor group enables the performance parameters of the compressor group to meet the requirements of the process and production, ensuring the long-term and stable operation of the unit.
According to reports, Fushun Petrochemical's 80,000-ton/year ethylene plant has mature and advanced process and production technologies in the world. In 592 sets of equipment, the localization equipment has reached 426 sets. The project will be completed this year. In May, the units began to drive vehicles in an orderly manner in batches. In October, the overall process was completed.
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In the air-conditioning and heating systems, especially in variable flow system, the situation changed when the system is running, the differential pressure of control valve or both ends of terminal equipment will change also.
Once differential pressure was changed too high to precise control will lead to a series of problems: low precision or heavy noise
generation in control valve actuation, more serious will cause the control valve cannot be closed, the system function failure even and so on.
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