Scaling problem in backpressure steam turbines
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If scaling occurs in the turbine nozzles and impellers due to poor steam quality, apart from an increase in the opening degree of the governor valves under the same conditions (an increase in secondary oil pressure), how can scaling be detected using the pressure in the wheel chamber? What is the linear relationship between the pressure in the wheel chamber and the secondary oil pressure?
Poor steam quality can cause blockages in the flow passages of the compressor. There are two types of such issues: sodium ions lead to salt deposition, while silicon ions cause scaling. When the flow path is blocked, the most obvious effect is an increase in the pressure within the wheel chamber; under the same load, more steam is required, and the opening degree of the control valve increases. Secondly, there is an increase in vibration and displacement.
The secondary oil pressure and the voltage output by the DCS should be corresponding; the opening degree of the oil motor should match accordingly. Of course, the secondary oil pressure is more intuitive. As the pressure in the wheel chamber increases, in order to maintain a certain low-temperature rotation speed, the opening degree of the intake valve must be increased.
First, test to determine whether your steam contains sodium or silicon. Appropriate treatment is required, which again involves water treatment.
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 contamination level. If there is a condenser, then parameters such as the condensate flow rate, vacuum level, and the amount of chemicals added must also be considered. By analyzing historical data on water quality, it is possible to determine whether scaling has taken place in the turbine, as well as to assess the structural condition 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, please feel free to contact me
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 contamination level. If there is a condenser, then parameters such as the condensate flow rate, vacuum level, and the amount of chemicals added must also be considered. By analyzing historical data on water quality, it is possible to determine whether scaling has taken place in the turbine, as well as to assess the structural condition 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, please feel free to contact me