The water and vehicle workshop of Huangling Coal Chemical Company successfully resolved the issues with the desulfurization system

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Huangling Coal Chemical Company’s Water and Vehicle Workshop successfully resolves issues with the desulfurization system. Author/Source: Shanxi Coking Chemical Co., Ltd. Date: 2022-05-13. Clicks: 10. How to ensure normal operation of the desulfurization and denitrification processes? How to ensure the long-term operation of boilers? How can we improve the efficiency and quality of the circular economy in subsequent cycles? All these require timely monitoring and adjustment of process parameters based on the production operating conditions. The desulfurization system in the water and steam workshop suffers from non-crystallization and difficulty in discharging materials, resulting in the inability of the workshop’s boiler to operate continuously for long periods. To address this issue, the workshop held several special meetings for discussion and research, and ultimately resolved the problems of difficult crystallization and discharge in desulfurization and denitrification processes, laying a solid foundation for the long-term operation of the boiler. It is understood that the problem of difficult discharge from the workshop is caused by incorrect process parameters, which result in the desulfurization and denitrification systems failing to crystallize and thus making discharge difficult. Workshop managers visit the production floor daily to identify bottlenecks hindering workshop operations. They compile a list of issues, assign specific personnel to address them, and resolve each one systematically. To address the long-standing issues of difficulties in discharging materials and achieving crystallization during desulfurization and denitrification processes in the workshop, a technical task force was established to implement grid-based management. By focusing on process parameter control, routine equipment maintenance, and special operational procedures, 3 specialized meetings were held, with more than 5 discussions conducted. In addition, 28 training sessions were provided for the team leaders and desulfurization operators. The process team referred to the solutions used by other companies in the same industry to address similar issues; it established a record-keeping system for slurry analysis, changing the frequency of analysis from once every 60 minutes to once every 30 minutes, while keeping detailed records. By monitoring changes in specific gravity and pH value, the team adjusted the amount of ammonia added accordingly, ensuring that discharge standards were met while reducing ammonia consumption. A dedicated person is assigned each day to conduct irregular inspections of the on-site slurry analysis, in order to ensure the accuracy and timeliness of such analyses and to guarantee the proper operation of the system. Through effective measures such as revising process parameters and establishing incentives for material discharge, after more than a month of operation and monitoring, the #1 and #3 desulfurization towers have resolved the issue of material accumulation. The system is operating stably with all parameters within normal ranges, and the daily production of ammonium sulfate has reached 57.32 tons, breaking the previous record. This represents not just a numerical increase, but also a fundamental solution to the problems of difficult crystallization and material discharge in the desulfurization system of the water treatment plant, issues that had been hindering the system’s long-term stable operation.