What are the dangers of fouling on turbine blades?
Thread Content
What are the dangers of fouling on turbine blades? Answer: When the quality of the steam is poor, salt deposits can form in certain parts of the turbine’s passages. Scaling is more severe in the high-pressure areas of the turbine, while in the low-pressure areas, the working conditions of the steam also contribute to scaling. The hazards caused by scaling on the turbine blades are as follows: 1. It reduces the efficiency of the turbine and increases energy consumption. 2. The pressure drop as the steam flows through the partitions and blades increases, and the reaction degree of the working blades also rises; in severe cases, this can cause overloading of the partitions and thrust bearings. 3. Salt deposits on the steam valve stems can lead to sticking, affecting the valve’s ability to regulate and operate properly.
It will cause the dynamic components of the turbine to malfunction
Hehe, it should be easy to damage the impeller, right?
When the nozzle or moving blades are heavily fouled, it leads to a reduction in the flow area and an increase in resistance. Furthermore, scaling distorts the shape of the nozzles and blade passages, roughening the blade surfaces and increasing friction losses, which severely affects the efficiency of the steam turbine. When a certain stage of the turbine becomes severely fouled, it causes the pressure ahead of that stage to increase, the enthalpy drop in the preceding stages to decrease, the reaction degree to increase, and thus the axial thrust on the rotor to rise. Furthermore, scaling on the surface of the moving blades increases both the centrifugal force and bending force acting on them, affecting the safe operation of the unit.
It will also increase the imbalance of the rotor, causing vibration.
To determine whether scaling has occurred, many different parameters need to be taken into account. These include the load, bearing displacement, wheel pressure, valve opening degree, the operation status of the boiler, as well as the steam content. If there is a condenser, then factors such as the condensate output, vacuum level, and the amount of chemicals added also play a role. By analyzing historical data on water quality and other relevant parameters, it is possible to determine whether scaling has taken place in the turbine, as well as to consider the structural components of the turbine. I am not very skilled, but my specialty is the online, non-stop cleaning of turbines. I have already completed such cleaning tasks at companies such as Fujian Refining & Chemical, Zhongjianeng in Cangzhou, Hebei, and Yulin Refinery in Shaanxi, and as a result the operational capacity of these turbines has increased. If your company needs turbine cleaning on an online basis, you can get in touch with me