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A large number of chemical synthesis reactions need to carry out circulating heating of reaction liquid under medium and high temperature conditions. The saturated vapor pressure of liquid rises along with temperature increase, which is easy to form cavitation at the pump inlet, causing impeller surface pitting damage and pump flow instability. Negative-pressure liquid extraction in vacuum reaction systems will also aggravate cavitation erosion of pump internal components. Cavitation damage belongs to fatigue damage that is difficult to be found in the early stage, which will gradually reduce pump operation efficiency until complete failure.
Yida expands the pump inlet flow guide area and designs a gradual shrinkage flow guide structure at the inlet runner to stabilize the inlet flow velocity and increase the effective net positive suction head allowed by the pump itself. The polished inner surface of the inlet channel reduces local flow resistance and avoids local pressure drop that triggers liquid vaporization. Through repeated simulation and actual bench cavitation tests, the optimized inlet structure effectively inhibits the generation and development of cavitation bubbles under high temperature and negative pressure working conditions.
The anti-cavitation optimized pumps are matched with high-temperature resistant PVDF material configuration to jointly cope with high-temperature corrosive liquid circulation in reaction kettles. The upgraded cavitation resistance does not change the original installation mode and pipeline connection size of standard pumps, facilitating direct replacement and upgrading of old equipment for global chemical enterprises. This hydraulic performance improvement expands the environmental adaptability of Yida pump products in high-end chemical reaction process supporting links and enhances the overall competitiveness in the high-value fine chemical supporting equipment market around the world.
