What about online descaling technologies for compressor scaling?
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I saw on the forum that the Lanhua ethylene plant has this technology; I’m not sure how much everyone knows about it, so let’s learn from each other!
The poster is referring to the online cleaning of turbine wet steam, and several such systems have already been implemented in China, for example in Daqing, Fushun, Shanghai, and other places. For the online cleaning of compressor turbines, the cooling method or nozzle water injection method is generally used. Gradually reduce the turbine inlet steam temperature to slightly above the saturated steam temperature, and use wet steam to remove the scale from the impeller. The key to online wet steam cleaning is to control the cooling rate properly and pay attention to condensate drainage.
Online cleaning can shorten equipment maintenance time, improve economic efficiency, and reduce gas emission
I’m sorry, I still don’t quite understand what the mechanism of detergency is. . Is his method of water injection and cooling the same as the principle of water and oil injection in compressors? Also, during operation, is there any adjustment to the rotation speed?
In ethylene plants, scaling only occurs in the pyrolysis gas compressor; however, with the application of water and washing oil injection technologies, long-term operation of the pyrolysis gas compressor poses virtually no problems. Currently, the online water flushing descaling technology for centrifugal air compressors has been successfully applied in multiple large-scale air separation units abroad, offering significant advantages and excellent energy-saving effects. It is still unknown whether it will be applied to the three units of the ethylene plant If so, those who are aware please share! Thank you!