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Long-term Stable Operation of the Production System in Shaanxi Chemical’s Gasification Plant in 2021 Author/Source: Shaanxi Chemical Date: 2022-01-29 Clicks: 26 In 2021, the average stable operation period of the gasification furnaces at Shaanxi Chemical was 55.6 days, with the longest single-unit operation time reaching 73 days； Compared to the same period in 2020, the average stable operation period has increased by 1 day, and the maximum operating time per unit has increased by 5 days ； The overall system stability of the purification section is better than in previous years, laying a foundation for high production throughout the year. In line with the actual production conditions and the requirements for cost reduction and efficiency improvement, the gasification plant has made steady progress in carrying out benchmarking activities in four areas: production management, equipment management, safety and environmental management, and team benchmarking. Through thorough benchmarking, the overall level of management has been steadily improved, with various benchmarking indicators showing continuous improvement; some of these indicators have even reached the benchmark values. In particular, indicators such as coal consumption per ton of ammonia produced, oxygen consumption, and slurry concentration have all reached the best levels in the company’s history. Regarding the management of the lubrication system in the gasification section’s mills, technical upgrades to these mills and measures such as the addition of additional rods were implemented, thereby enhancing the mills’ capacity and efficiency in producing pulp. This ensured that the coal slurry concentration remained above 62.8%, laying a foundation for stable and high-level production in the system. This work has reached a leading level among peers in terms of water-coal slurry concentration; experience gained was shared at the national annual conference on water-coal slurry gasification processes and equipment technologies, and the overall efforts were recognized by the experts and peers present. To address the issue of high consumption, efforts were primarily focused on strict control over ash water treatment, ensuring high quality in the maintenance and cleaning of individual furnaces, improving the burners used in the process, increasing the concentration of coal slurry, maintaining an appropriate temperature in the gasifier, raising the effective gas components in the process gas, and controlling the temperature of the gas at the output stage. Through repeated experimentation and strict management, consumption was largely brought under control. In 2021, the branch plant adhered to the basic principles of \"safety first, environmental protection prioritized, prevention as the key approach, thorough inspections, and comprehensive management.\" It strictly implemented the company’s relevant safety and environmental protection regulations, provided regular safety training for employees, conducted periodic inspections for potential safety hazards. Whenever issues were identified, responsibility was traced, strict assessments were carried out, and follow-up actions were taken to ensure corrections were made, thereby maintaining an overall positive situation in terms of safety and environmental protection at the branch plant.