The first startup of Boiler No. 1 in the Chemical Power Plant of Shaanxi Chemical Industry was successful

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Successful first-time commissioning of Boiler No. 1 in the Chemical Power Plant of Shaanxi Chemical Industry Co., Ltd. Author/Source: Shaanxi Chemical Industry Date: April 25, 2022 Clicks: 10 At 17:00 on April 23, after 6 hours of heating and pressure increase, Boiler No. 1 in the power plant was successfully integrated into the production system, marking the successful completion of the technical upgrades, inspections, and defect rectification work for this boiler system. Due to their long operating cycles, Boiler No. 1 and the desulfurization absorption system in Phase I involve a large number of maintenance tasks, totaling over 60 items. Among these, key tasks include the upgrading and modification of the dust collector, the replacement of the cold section of the preheater in the low-temperature zone, the upgrade of the boiler’s DCS system, the restoration of the furnace flame detection system, the installation and operation of an intelligent control panel for the boiler, measures to address colored smoke emissions, as well as the correction of defects in the desulfurization equipment. At around 9 a.m. on April 5, Boiler No. 1 was shut down as planned to begin cooling down. Simultaneously, the fuel oil and gas supplies were disconnected and isolated; all valves related to feedwater before the furnace, main steam, and drain systems were closed and isolated, with \"Do Not Operate\" warning signs placed on them. For the first-phase desulfurization system, the ammonia gas, ammonia water systems, slurry systems, flue gas systems, and water systems were isolated using blind flanges, along with corresponding warning signs. At 8:00 on April 7, Boiler No. 1 and the first-phase desulfurization unit were cooled down and isolated from the process, marking the start of comprehensive maintenance work. During the shutdown period, the branch plant took advantage of this valuable opportunity to inspect and address any issues with Boiler No. 1 and all the rotating equipment in the phase-one absorption system, thereby further improving the quality of maintenance work and laying a solid foundation for the stable, efficient, and reliable operation of the system once it is restarted. At 20:00 on April 21, all maintenance, technical modification, inspection, and defect-resolution tasks related to Boiler No. 1 and the absorption system of Phase 1 were completed, and the process moved fully into the quality inspection phase. To ensure the quality of the maintenance work, the plant’s management personally led a team consisting of process engineers, equipment specialists, safety technicians, and other relevant staff. They inspected every valve, piece of equipment, pipeline, and installation unit in detail, checking for any missed welds, ensuring that valves were installed in positions that facilitated safe operation, and verifying that all sealing surfaces were tight. Any issues identified were promptly addressed by the construction units and maintenance personnel, until all maintenance tasks met the relevant technical specifications and quality standards. At 8:00 on April 22, the electrical and instrumentation facilities were put into operation as required. The individual tests and joint tests of the operating equipment were successful, all interlock tests passed, and the conditions for starting up were met. The desulfurization absorption system for Phase 1 and the boiler began to be filled with water for pressure testing and leak detection; at 12:00, the desulfurization absorption system for Phase 1 started operating normally, and at 11:00 on the 23rd, Boiler No. 1 was successfully ignited. Thus, the 18-day maintenance, technical upgrades, testing, and defect resolution work for the first-phase absorption system of Boiler No. 1 was successfully completed. All maintenance tasks were finished two days ahead of schedule, and the boiler was brought online successfully on the first attempt.