Power plant desulfurization pumps are key equipment in flue gas desulfurization (FGD) systems, mainly used for conveying corrosive and abrasive medium (such as limestone slurry and gypsum slurry).
Type: They are cantilevered single-stage single-suction centrifugal pumps, commonly installed in horizontal or vertical configurations.
Flow Parts Materials:
Commonly used materials include high-chromium alloys (such as Cr30A, A49) or steel-lined ultra-high-molecular-weight polyethylene (UHMW-PE), which offer excellent corrosion resistance, wear resistance, and impact resistance.
UHMW-PE has wear resistance 7–10 times that of carbon steel/stainless steel and has the highest impact strength among engineering plastics.
Shaft Seal Types:
Mechanical seals are commonly used (such as cartridge type, waterless flush type), while some conditions use packing seals or mechanical seals (K type/K1 type).
Seal design focuses on preventing slurry leakage and reducing maintenance requirements.
Structural Optimization:
A back-pull-out/back-door structure is used, facilitating maintenance without removing the inlet and outlet pipelines.
Impellers and shafts commonly use double-key connection with double locking or threaded connection to prevent reverse rotation and detachment.
The structure includes axial adjustment, allowing the gap between the impeller and liner to be adjusted to maintain high-efficiency operation.
