How to Select Pumps Suitable for Desulfurization and Denitrification Processes?

Selecting appropriate pumps for desulfurization and denitrification processes demands comprehensive consideration of multiple key factors, as detailed below:

• Medium Characteristics: The slurry involved in these processes is highly corrosive and has high solid content. Acidic components like sulfuric acid can erode pump bodies, so corrosion-resistant materials such as stainless steel or fluoroplastic are preferred. For slurries containing solid particles (e.g., limestone, gypsum), wear-resistant pumps (e.g., slurry pumps) with impellers and casings made of wear-resistant materials are essential to mitigate particle erosion.

• Process Parameters: Accurate calculation of flow rate and head is critical. Determine flow rate based on system processing scale—high-flow pumps are usually required for desulfurization tower circulation. Calculate head by considering slurry transportation height and system resistance, ensuring the pump’s rated parameters meet maximum system requirements with a 10%–20% margin. Additionally, match pressure capabilities to process needs, such as high-pressure pumps for denitrification injectors to ensure effective reductant injection.

• Operating Conditions: Prioritize reliability and stability for continuous long-term operation; select mature, reputable models and equip backup pumps. For high ambient temperatures (e.g., summer or near high-temperature equipment), choose high-temperature-adaptable pumps or install cooling measures to avoid component damage.

• Maintenance and Cost: Opt for simple structures to facilitate daily maintenance. Evaluate total lifecycle costs rather than just initial investment—high-efficiency, reliable pumps may have higher upfront costs but save energy and reduce repair expenses long-term.

• Safety Performance: For flammable/explosive media (e.g., liquid ammonia in denitrification), explosion-proof pumps are mandatory to ensure operational safety.