Thread Content
Successful first-start-up of the turbine in Unit 1 of the air separation unit at the Shenhua Yulin SYCTC-1 project / Author/Source: Hualu / Date: 2020-07-03 / Clicks: 2 On July 1, the turbine in Unit 1 of the air separation unit, part of the Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project (Phase 1), which was engineered and constructed by Hualu Technology through EPC, was successfully started up for the first time. All systems were operating smoothly, and the overspeed shutdown tests were carried out successfully, marking significant progress in the project’s development. To ensure the successful achievement of the turbine startup goal, the project department established a Party member responsibility team for the \"air separation unit commissioning\" task, led by the project manager. This team actively organized and coordinated efforts among the owner’s project team, suppliers, patent holders, construction contractors, as well as the production and operation staff from Yulin Company, to carry out specialized \"three inspections and four determinations\" activities regarding the prerequisites for turbine startup ； Carefully formulate a plan to address the remaining tasks in areas such as piping, electrical systems, instrumentation, civil works, and 6S labeling ； Carefully prepare and review the commissioning plan for the 1-to-2 unit. Through the day-and-night efforts of all the staff, the preliminary tasks required before starting up the turbine were completed as planned, including pressure testing of the high-pressure steam P91 pipes, chemical cleaning, high-pressure steam purging, oil circulation in the unit, individual testing of auxiliary equipment, and instrument logic testing. At 5 a.m. today, low-pressure steam was introduced into the air separation unit; subsequently, a two-stage jet ejector was used to evacuate the air cooling system. The leakage rate and vacuum level of the air cooling system met the design and operational requirements, and the waste steam and condensate recovery system was ready for operation. At 10:00 exactly, once the temperature of the high-pressure steam pipeline reached the required level, the turbine’s quick-shut valve was opened and the turbine was started up. Following procedures such as warming up at a low speed, accelerating for operation, and testing the overspeed protection system, the turbine finally reached an operating speed of 4353 r/min, which triggered the unit’s interlock protection system and caused the turbine to shut down successfully. During the startup process, technical parameters such as the temperature of the turbine oil, bearing displacement, bearing shell vibration, and machine expansion were all within normal ranges; all interlock mechanisms of the unit functioned properly, and the turbine started successfully on the first attempt. The successful start-up of the turbine indicates that the core equipment of Shenhua Yulin’s 3*100,000 Nm3/h(O2) air separation plant now has the capability to provide the necessary power for operation, laying a solid foundation for the subsequent testing of the air compressors, boosters, and expanders, as well as for the production of high-quality oxygen and nitrogen products through cryogenic processes. Taking this as an opportunity, the project team will continue to thoroughly implement the company’s requirements for the \"Year of Enhanced Precise Management in Engineering Projects.\" By taking practical actions, they will uphold the core value of \"exceeding customer expectations and creating best practices,\" and make steady efforts to accelerate the subsequent commissioning of the air separation unit, striving to achieve the annual goals.