In the process of using desulfurization and denitrification equipment, we need to take good protection because it is susceptible to corrosion. So, do you know why it corrodes?

In actual work, due to the complexity of the working environment, there may be various corrosive substances. Especially in the process of desulfurization and purification of various flue gas dust, the sulfur dioxide gas in it will produce sulfuric acid under certain conditions, and sulfuric acid is extremely corrosive. Especially for steel desulfurization and denitrification equipment, it will produce sulfates.

More importantly, these substances will cause more serious corrosion to the lining part of the desulfurization and denitrification equipment. Even in equipment without flue gas reheaters, the PH can reach 2. For example, when using wet desulfurization and denitrification technology, the flue gas contains not only sulfur dioxide, but also a lot of particulate matter.

Then, some particulate matter may remain in the desulfurization and denitrification equipment undergoing purification, and when the desulfurizer is discharged, it will also cause corrosion to the lining device of the spray layer. If the limestone desulfurization process is used to remove sulfur dioxide, a higher pH value may be beneficial to flue gas purification, but it will make the limestone difficult to dissolve.

In this case, a certain amount of calcium sulfite may be formed in the desulfurization and denitrification equipment, and over time, scaling and blockage will occur in the pipeline. Therefore, during the actual work, we also need to strengthen the protection of the desulfurization and denitrification equipment.