With regard to the first phase project of Shaoxing Wastewater Treatment Plant(WWTP),the maintenance and reconstruction for cooling system of centrifugal blower were introduced.

High speed centrifugal blowers are key equipment in sulfuric acid production system with waste gases from zinc metallurgy.

Since centrifugal blower D900-2 5/0 97 was remaked with three dimensional,flow model,the blows raises from 900 m 3/min to 1 100 m 3/min,the exit pressure increases from 2 45×10 5 Pa to 2 94×10 5 Pa, the top efficiency advances from 78% to 82%.

Practice of increasing capacity and improving efficiency and wear behavior of centrifugal blower;

Also a lot of simulator experiments which take D900 centrifugal blower of a metallurgy factory as an example have been done, and the result shows that the method can be used to identify the magnitude and directi.

Through the test and analysis of the vibration in speed increasing box of D1500 centrifugal blower units,the reason of causing coupling damaged frequently is found out.

Aimed at the start-up failure of high-speed centrifugal blower in a WWTP,the failure diagnosis was carried out,and the failure was eliminated successfully,ensuring the normal operation of the equipment.