The impact of oil dust in gas on desulfurization

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This post was last edited by Steven_p0kTk on 2024-11-6 09:00. Improper control of parameters in the stage prior to desulfurization led to an increase in the levels of tar and dust in coke oven gas. This will have various adverse effects on the desulfurization system. I. Impact on desulfurization agents 1. Gas containing large amounts of impurities such as tar leads to a rapid increase in the density and viscosity of the desulfurization liquid, reducing the efficiency of absorption and mass transfer. It also tends to weaken the activity of the catalyst, resulting in greater catalyst loss and increased operating costs. II. Impact on equipment 1. Equipment blockage: Tar and dust tend to accumulate in pipes, nozzles, packing, mist catchers, and other areas, causing equipment blockages that affect the flow of gas and the proper operation of the desulfurization system. 2. Wear on equipment: The flowing gas, along with tar and dust, can cause wear on the inner walls of the equipment as well as components such as impellers, thereby reducing the equipment’s service life and reliability. 3. Increased load: When the oil and dust content in the gas is too high, the density and viscosity of the desulfurization liquid increase rapidly, thereby increasing the load on the circulation pump. III. Impact on the process 1. Impact on desulfurization efficiency: If the content of oil and dust in the gas is too high, the density of the desulfurization liquid increases rapidly, which affects mass transfer and thus impacts the absorption and regeneration processes in desulfurization. It also makes it difficult for sulfur to float, resulting in weak foam formation and a reduced processing efficiency of the desulfurization tower. Due to issues such as reduced desulfurization efficiency and equipment blockage, the desulfurization system is unable to meet production and environmental protection requirements. 2. Impact on the morphology of sulfur foam: An excessive amount of oil dust in the desulfurization liquid causes changes in the surface activity of this liquid, which can lead to foaming and a weak structure; as a result, it becomes difficult to handle the sulfur foam. 3. Increased operational difficulty: To counter the effects of tar and dust, it is necessary to increase the frequency of equipment cleaning and maintenance, which raises the workload and operational challenges for the staff. When oil dust enters the desulfurization system, it can be carried away by sulfur foam, but the amount that can be removed in this way is limited; over time, this accumulation can lead to blockages in the desulfurization tower ； It can be replaced by a large amount of effluent, but the large volume of waste fluid increases the processing load on downstream equipment, potentially leading to a range of environmental issues in severe cases.