Progress of the New Tian Coal Chemical Plant overhaul

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Progress of the Overhaul at Xintian Coal Chemical Industry Author/Source: Zhejiang Energy Xintian Coal Chemical Industry Date: 2020-07-12 Clicks: 1 On July 9, thanks to the concerted efforts of all those involved, the overhaul of Xintian Coal Chemical Industry’s No. 2 boiler was successfully completed, with the quality of all maintenance work meeting the standards required for such overhauls. The major overhaul of Boiler No. 2 officially began on June 5, after the boiler was shut down for cooling. Since, in addition to the standard tasks, this major boiler overhaul also includes a technical upgrade involving the upward adjustment of the burner cut angles ； Insulation added to the furnace top, some water wall pipes replaced, metal thickness monitoring of the boiler ； Technical improvement projects such as safety valve calibration and special maintenance tasks mean that major overhauls are characterized by tight schedules, heavy workloads, and high requirements. In the early hours of July 8th, the Xintian Coal Chemical Plant was brightly lit, with all its production units resuming normal operation after undergoing major maintenance. To date, the addition of a new liquid seal tank to the VOC transmission pipeline for the biochemical treatment of wastewater at Xintian Coal Chemical Industry has been successfully put into operation, marking the successful completion of the technical upgrades to the company’s wastewater treatment system. Process improvements eliminate potential hazards and contribute to the safe operation of the system. The company’s water treatment and wastewater treatment equipment is essential for dealing with wastewater generated in chemical production processes as well as domestic wastewater, playing a key role in energy conservation, consumption reduction, and environmental protection. Volatile organic gases are generated during wastewater treatment, and they need to be collected and transported promptly to the regenerative thermal oxidizer (RTO) in the purification facility for treatment. Earlier on, the wastewater treatment facility experienced excessive levels of toxic and harmful gases in its emissions; investigations revealed that this was caused by backflow of RTO exhaust gases. To ensure the safety of the personnel on duty and the smooth operation of production processes, and from both economic and safety perspectives, the renovation costs are reduced by implementing a liquid seal for the pipelines, thereby preventing RTO exhaust gases from flowing back into the wastewater treatment fan room. It not only eliminates the daily safety hazards in the sewage treatment process but also provides a solid guarantee for the stable operation of the entire water treatment system. Process optimization helps save energy and reduce consumption, thereby supporting the sustainable development of production. While ensuring the stable operation of the maintenance systems, the company’s water treatment workshop pays close attention to completing the repair work properly. During this technical upgrade project, the staff on duty actively supervised and assisted the on-site maintenance workers, standardized the procedures for pipeline connection, and gradually implemented the technical upgrades to the liquid seal tank. Once this pipeline is completed, it will prevent the backflow of toxic and harmful gases such as carbon monoxide, ensuring the safe operation of the wastewater treatment area. At the same time, the water treatment and recycled water station will also ensure the effective collection of condensate from the RTO system; the condensate stored in the condensate tank is then transferred to the collection tank. By effectively controlling the temperature of the condensate, the water quality of the circulating water system is improved indirectly, thereby further achieving energy savings and reduced consumption.