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Desulfurization butterfly valve is a corrosion-resistant and wear-resistant butterfly valve designed specifically for desulfurization and denitrification engineering. It fully considers the corrosion and wear of desulfurization slurry on the valve, ensuring that the valve plate lining is the only component that can come into contact with the slurry, while other components are not corroded by limestone (or lime paste) slurry. Therefore, the valve body and stem do not require the use of expensive alloy (2205) materials, greatly saving costs. The unique seat design of the desulfurization butterfly valve completely separates the valve body from the fluid medium. Compared with other similar valves, it has a better way of securing the seat, quick replacement of the seat on site, zero leakage of the valve, and low friction. The butterfly valve plate is made of high-performance alloy (2205) material, effectively resisting corrosion and wear of the slurry.

Principle of desulfurization butterfly valve

Desulfurization refers to the use of calcium based methods to fix the sulfur element in coal into a solid to prevent the generation of SO2 during combustion. Currently, desulfurization methods can be generally divided into three categories: pre combustion desulfurization, during combustion desulfurization, and post combustion desulfurization. The desulfurization butterfly valve must meet the requirements of corrosion, wear flow rate, temperature, and other factors. Various mineral fuels contain sulfur, especially coal, which generates a large amount of SO2 after combustion, seriously polluting the air. In order to control pollution, the effective method is flue gas desulfurization. Including China, the lime (limestone) wet desulfurization technology is currently widely used in the world. This process system involves various corrosive media and contains granular materials, which cause strong corrosion and wear to the equipment. Therefore, there are special requirements for the material and structural form of the valve.