Domestic units have been used in ethylene plants, and various issues have arisen during production; please share your experiences.
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Let me throw out some ideas to stimulate further discussion. In summary, regarding the Hangzhou Steam Turbines used in the large ethylene plants in Panjin, Fushun, and Wuhan, it is especially the case with the large ethylene plant in Panjin: the control oil lacks a filter, resulting in insufficient precision of the control oil; this leads to sticking of the throttle slide valves and frequent fluctuations in the unit’s rotation speed. Solution: A filter was added to the control oil inlet, which eliminated this issue.
There are no major issues with the operation of domestically produced units, but improvements are still needed in terms of details; problems such as oil leakage and seepage are common in such units.
Domestic compressors have poor machining quality, generate high operating noise, and experience lubricant leakage. Especially oil leakage and poor return of oil – in some cases, modifications have yielded very good results.