How to deal with scale formation in steam turbines?
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Recently, issues with steam quality have led to scaling on the turbine blades; it appears that this soft scale is caused by sodium salts. Are there any good methods to remove it without removing the cylinder head? For example, 0.3 MPa of steam can be introduced while the drum is rotating, or 1.0 MPa can be introduced at 500 r/min, etc.
We did it by connecting a line for deoxygenated water to the bypass valve at the turbine inlet; the turbine was supplied with steam at 1 MPa and rotated at 1,000 revolutions per minute, with deoxygenated water being introduced. I’m not too familiar with the subsequent process operations – it mainly involves controlling the temperature and rotation speed
Saturated steam inlet compressor; test the salt content at the steam outlet. Has the pressure difference before and after the steam inlet filter increased?
Is there a specific plan? Could you send one? Thank you! 4490795@qq.com
Is there a filter at the steam inlet? Isn’t the filter caked with salt?
Is there a filter at the steam inlet? Isn’t the filter caked with salt?
It can also be handled without stopping; the requirements for process control in this case aren’t very stringent, and the effects aren’t that significant； It is best to propose handling the rotor during the parking for maintenance!
What to do if you can’t stop? Please give some guidance!
Ultimately, it is still necessary to maintain good steam quality; the inlet filter must be severely clogged with salt. Can you ensure the proper inlet steam pressure? If there’s no stop, does that mean using saturated wet steam to wash the salt?