The specific details of Sinopec’s several air separation units
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It is said that several air separation units used by Sinopec for the conversion from oil to coal are currently experiencing problems; in Anqing, in particular, the perlite in the cold boxes has been removed. If anyone knows the details, please feel free to share them.
It is recommended that those who are aware of the situation share the information with each other, so that everyone can take it as a warning!!
I’m also very curious to know how things are now? It can’t be a nitrogen pollution generator now, right? http://bbs.hcbbs.com/thread-123102-1-1.html This post was last edited by Tianya Langji on 2008-2-24 11:35 ]
It’s most likely there’s a problem with the heat exchanger inside the cold box; otherwise, there would be no need for such extensive repairs
Maybe what was said on the 3rd floor is correct; it turned out to be a renovation of the air separation tower, involving the removal and reinstallation of the trays inside the tower, as well as some changes to the pipelines.
Those who are aware of the specific details, please feel free to share your insights
It was mainly the nitrogen expansion refrigeration process designed in the initial stage by Hangyang; this process could produce ultra-high-pressure nitrogen. The opening ratio at the bottom of the tower was too high, which led to liquid leakage during operation. As a result, the oxygen extraction rate dropped to around 80% of the intended capacity. The plant was shut down for repairs, and it seems that the modifications were successful.
Nitrogen expansion process, Hangyang Oxygen! The revolution is not yet complete; comrades must keep striving. There are no issues with the nitrogen expansion process in Linde’s air separation units; not a single unit in Yueyang Dongting, Yuntianhua, or Shenhua has any problems.
The problem in Anqing has nothing to do with the nitrogen expansion process; it’s a matter of scale – the equipment is too large, and it **exceeds Hangyang’s design capabilities at that time**. Let this serve as a lesson regarding the localization of large-scale air separation equipment; I hope the costs incurred were not in vain (given Baosteel’s successful implementation of such technology, there are indeed some benefits to be gained). Our national industry... sigh.
The Hangyang technology used for air separation in Shandong should not have encountered any problems so far.
The system produced by Hangyang Anqing is indeed not as mature in terms of nitrogen circulation; however, Hangyang’s air separation systems have functioned without any problems up to now, and its nitrogen circulation systems will also work fine in the future. Support Hangyang – support domestic products!