Discuss iron-molybdenum sulfidation

As far as I remember, the precision desulfurization section is generally equipped with a heating line in its design, with the outlet located at the exit of the medium-temperature desulfurization tank. Imagine, what would happen during maintenance or replacement without a nitrogen flow? Without a nitrogen flow process, I believe it is necessary to find a way to add one (which must pass through a heating furnace); ideally, a circulating nitrogen pipeline should be established, as this would facilitate the connection of the entire process and the conversion units, allowing for faster heating and saving time. If you insist on using coke oven gas for direct heating, you should consider the following issues: 1. Even if you do everything possible to raise the temperature of the small or large iron molybdenum components to 250 degrees. Well, coke oven gas already contains sulfur, and sulfidation begins at 200–250 degrees; how can you ensure a constant temperature during the sulfidation process? 2. Once the temperature soars, what methods do you use to control it? 3. A certain space velocity is required during sulfidation; using coke oven gas for sulfidation also demands that this space velocity be maintained. How do you resolve this contradiction?

There must be nitrogen pipelines; which design firm was responsible for the design? The nitrogen for advanced desulfurization should be introduced between the pre-desulfurization tank and the primary preheater; under normal conditions this valve remains closed, and it is opened only when the nitrogen needs to be heated or when replacement is required.

It was designed by Tianyi; it has a nitrogen-containing pipeline for precise desulfurization, but it doesn’t lead to the heating furnace