How to prevent tower blockage during coking desulfurization?

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During the coking desulfurization process, various problems can arise, but tower blockage is undoubtedly the most significant one. Once the desulfurization tower becomes blocked, it causes excessive pressure on the fans, which ultimately prevents the coke oven from operating properly. Therefore, although abnormal factors are inevitable in the control of the desulfurization process, we can identify the causes from aspects such as the process, equipment, desulfurizing agents, and human factors. I. Regarding desulfurization agents: (1) Multicomponent catalysts should be used, and the proper ratio of their components is crucial; in different sites, any excessive addition may have negative consequences. II. In terms of process: (1) The regenerator must be in good working condition, and it is necessary to ensure an adequate supply of air as well as an appropriate foam flotation interface ； (2) When the operating conditions permit, a large circulation volume and a low catalyst concentration should be used, in order to increase the liquid-to-gas ratio and the spraying density. When the system is under reduced load, it is not necessary to reduce the liquid volume; moreover, regeneration should be intensified and the solution optimized ； (3) The catalyst content must meet the specified standards. The replenishment method should involve multiple, small-volume, continuous additions to ensure relatively stable concentration levels. The solid catalyst must be fully dissolved before being added to the system ； (4) The recovered filtrate or residual liquid must meet the required standards after treatment, and its temperature should not be too high to avoid affecting regeneration and flotation ； (5) During short-term shutdowns of the system, stop the gas supply but keep the pump running, to enhance the cleaning of the packing section and prevent the formation of dry areas to the greatest extent possible. III. Equipment aspect: (1) A side filter is installed at the outlet of the solution pipeline to facilitate the removal of various physical impurities ； (2) If a sulfur melting tank is used, liquid filtration equipment must be installed to prevent refined sulfur from entering the desulfurization tower ； IV. Human factors: (1) Problems identified should be analyzed and addressed promptly to prevent them from escalating, so that small issues do not turn into major ones ； (2) Any abnormalities in the test analysis results of desulfurized liquefied gas must be investigated promptly; they cannot be ignored. In short, on the one hand, it is necessary to summarize experience and draw lessons from actual situations in order to improve management levels ； On the other hand, it is necessary to partner with companies that possess professional desulfurization technologies. Such companies can not only provide catalysts that are fast-acting and highly selective, but more importantly, they can offer a professional technical service team capable of analyzing and diagnosing problems based on fundamental principles, and providing the best possible solutions. At the same time, it helps enterprises in the coking industry to develop a closed-loop management and upgrading technology for harmless gas purification, refinement of by-product sulfur, and technological upgrades to desulfurization equipment.