HCBBS Forum (English)
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request

Using process control as a method to address issues in desulfurization

2023-06-12View Original

Thread Content

As the saying goes, “30% is skill and 70% is management,” and this also applies to desulfurization systems. Throughout the desulfurization system, as long as overall management is proper and there is coordination in terms of details and execution, the site can maintain efficient and stable operation over a long period of time. Among these is the overall management work, which includes process management for the addition of catalysts and alkalis, management of the composition of desulfurization fluids, management of sulfur recovery, and control management of the production process. Process management for the addition of catalysts and alkalis: First, the catalyst must be effectively dissolved using desulfurization solution or soft water, and activated in air for a specified period of time. When it is added to the desulfurization system, it must be distributed evenly to prevent excessive oxidation or insufficient oxidizing capacity. Similarly, ammonia water or soda ash also needs to be added evenly to prevent fluctuations in the pH and alkalinity of the desulfurization solution. Some people mistakenly believe that as long as the total amount added remains unchanged, it is possible to use a sudden addition of catalysts to float sulfur bubbles; this has a significant impact on the oxidation capacity of the desulfurization solution, as well as on the rate of increase in by-products. Attention is paid to the addition of chemicals and alkalis, and proper management is ensured. Shift handovers are carried out for the inventory of chemicals and alkalis, the amounts added, and the remaining quantities, and analyses and evaluations are conducted on the reasons for their consumption, with experiences summarized and lessons learned. Management of desulfurization solution composition: The composition of the desulfurization solution is not only related to the efficiency of desulfurization but also reflects the problems existing in the operation of the desulfurization unit; the management of desulfurization primarily focuses on controlling the composition of this solution. Enterprises should maintain proper records of the composition of desulfurization solutions, focus on the details, improve the analysis methods, and constantly monitor the trends in the composition of these solutions. When changes occur, it is necessary to identify the reasons for those changes in order to properly determine whether there are problems with the desulfurization system. This allows for timely identification of solutions to the issues, thereby preventing the deterioration of the desulfurization process and avoiding accidents related to it. In desulfurization systems, the analysis of desulfurization liquid, clear liquid from sulfur melting tanks, or filter liquids from filter presses must be carried out in a systematic and well-founded manner. Management of sulfur recovery: The sulfur recovery rate is an important indicator to determine whether the desulfurization system is operating properly. In the management of sulfur recovery, the main issues include the flotation of sulfur foam, the operation of plate-and-frame or sulfur melting reactors, and the recycling of the liquid waste. These include: 1. Lack of attention to the flotation of sulfur-containing foam, resulting in low sulfur recovery rates over a long period, as well as fluctuations in hydrogen sulfide levels and increased pressure differences in the desulfurization system ; 2. Insufficient attention is paid to the operation of the sulfur melting tank; temperature and pressure control are inadequate, resulting in a large amount of sulfur particles in the liquid ; 3. Failing to carry out cooling or sedimentation treatments for the liquid recovery, and returning a large amount of this liquid to the desulfurization system, can lead to regeneration problems and create a vicious cycle. During normal system operation, it is necessary to avoid such problems by constantly monitoring whether the sulfur recovery rate is within normal limits, carrying out regular inspections, and ensuring the proper functioning of the entire system.

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.