Desulfurization pumps have two structures: horizontal (DT) and vertical (TL). They are axial suction, single-stage single-suction cantilever centrifugal structures. They have the advantages of high efficiency and energy saving, corrosion resistance and wear resistance, low vibration, low noise, reliable operation, long service life, and convenient maintenance. They can be widely used in the desulfurization system of thermal power plants, aluminum smelters, refineries and other industries to transport limestone or gypsum slurry. The chloride ion content in the slurry is allowed to reach 60000ppm, and the pH value of the slurry is allowed to be between 2.5-13.