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Reasons for tower blockage in the desulfurization system: Reasons for tower blockage in the desulfurization system: Reasons for tower blockage in the desulfurization system: (1) Target control of the desulfurization system. (2) Heat in the liquid phase when the temperature is low. (3) Selection of internal components for the desulfurization tower. (4) An appropriate desulfurizer was not selected. (5) The desulfurization liquid has poor regeneration capacity, resulting in a high sulfur content in the depleted liquid. Poor regeneration occurs when the NaHS produced by the absorption of H2S by Na2CO3 inside the tower is not completely oxidized to elemental sulfur; instead, it ends up in the foam tank as a result of flotation and is carried into the desulfurization tower. It is only in the upper section of the tower that the oxidation reaction takes place, resulting in the formation of elemental sulfur, which then adheres to the surface of the packing. This is the main reason for blockages in the upper part of the desulfurization tower. (6) Mass of sulfur recovered: The quality of sulfur recovery directly reflects how much H2S has been removed. Even if the desulfurization system is operating properly, if sulfur cannot be recovered, it must remain inside the tower, posing a risk of blocking the tower. Also, if the sulfur melting backflow returns to the system, it is an important factor contributing to a high content of by-products. (7) Dust removal function of the previous section: As is well known, the gas entering the desulfurization system consists of a complex mixture of components, including many impurities and contaminants. Once it enters the desulfurization tower, it is difficult to remove these substances; they mix with the sulfur paste and can cause blockages in the tower. Typical packed towers are divided into 3 sections; if the pressure difference across the packing in the lowest section is high, it is most likely due to inadequate dust removal.