Seek technical documentation and operational information on 60,000 Nm³/h air separation units for internal compression applications
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This post was last edited by wcq1010 on 2015-11-15 at 22:55. Are there any colleagues who work at China Coal Yulin? I heard that the working conditions there are quite good. Since this unit uses a structured packing design in the lower tower, I would like to learn more about it. Thank you!
Sit on the sofa by yourself; lift it up and everyone can see!
The internal compression process is 4*60,000, the same as that of Baotou Shenhua’s 4*60,000 unit. It is optimized based on the Baotou Shenhua air separation unit. It operates more stably and has relatively lower energy consumption. The lower column uses packing, and the operating resistance of the lower column is around 5 kPa. It’s not easy to find information, but I do know a bit about it as I have been there to visit.
Thank you for your prompt reply! I’m interested in using fillers in the lower section of the tower; Baotou uses a four-flow tray tower, and I’d like to compare the differences in terms of configuration and application, in order to understand the development trends of fillers used in the lower sections of towers in China!
There will be more and more packing in the lower tower, gradually replacing the sieve plates in that tower.
After all, there aren’t many available these days, especially domestic products. Anyone from China Coal Yulin, please leave a comment!
There are quite a lot of opinions these days; all the tower equipment that our company orders from now on will be equipped with fillers. You can ask me about the situation in Yulin.
You can still get equipment; with the current market conditions, that’s really rare~~ Which brand’s equipment did you buy? ? W version~
Is the W version from China Coal or Hangzhou Oxygen? Since domestic manufacturers have not yet widely used structured packing in downstream applications, I conducted a rough investigation and found that three major manufacturers, along with approximately ten other companies, have such systems in operation; the smallest of these systems has a capacity of 7500 Nm3/h of O2. The book \"New Questions and Answers on Oxygen Processing\" was published in 2006; question 248 on page 133: Why are regular packed columns generally not used to replace tray columns in the lower section of distillation towers? “The number of theoretical plates equivalent to each 1m of packing in a structured packing tower is inversely proportional to the empty tower velocity of the rising gas, and inversely proportional to the square root of the gas density. Due to the high pressure in the lower column and the high density of the gas, when the volume of gas to be processed and the diameter of the column remain constant, the number of theoretical plates per meter of packing decreases. This means that a higher column height is required to meet the requirements, which in turn increases resistance and energy consumption ； If the flow rate is reduced by increasing the tower diameter, thereby raising the theoretical number of theoretical plates per meter of packing, it will increase the investment cost for the lower section of the tower. Therefore, whether to use structured packing in the lower tower requires a balance of pros and cons. At present, sieve plate towers are still the most commonly used. ” Another theory is that at that time, domestic manufacturers were unable to produce structured packing on their own, which led to high manufacturing costs and thus limited its widespread use. For whatever reason, there are very few domestic units of 60,000-class or higher at present; neither KaiKong nor ChuanKong has any operational experience in this regard. Among the 60,000-class units put into operation by HangYao, only the four units at China Coal Yulin use packed towers, while other units such as those in Baotou still use four-flow tray towers. Therefore, what is wanted to know is: to what extent are domestic manufacturers currently proficient in applying the packing down-column technology in large-scale air separation units? Does the operation of the 60,000-ton plant at China Coal Yulin meet the objectives of a packed tower: a wide adjustment range and energy savings! Seeking advice!
By the way, there’s one more crucial point: for large installations worth over 60,000, it’s essential to ensure that their operation is stable and that safety is guaranteed! This requires a detailed understanding of China Coal’s operations! Thank you!
What you’re asking about are all trade secrets, and they generally won’t be told to you so easily