The localization status of 300,000-ton synthetic ammonia compressors
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The domestic manufacturing sector has developed rapidly in recent years. What is the status of local production of compressors used in the large-scale fertilizers introduced in the 1970s and in the facilities built thereafter, as well as their operating conditions?
The four main units used in ammonia synthesis are operating well, with few problems occurring; these include air compressors, ammonia compressors, nitrogen compressors, and syngas compressors. Domestic CO2 compressors, on the other hand, tend to have more issues.
The centrifugal CO2 compressor made by Xiadaisai can be counted as one example; however, it will only be known whether it works well or not after successful trial operation Anyway, it’s now part of the project! The key point is that it’s much cheaper than those abroad!
It may be achievable in terms of design technology, but can the material of the equipment meet foreign standards? Truly good products are not cheap; if you want a lower price, the quality of the materials has to be reduced, and such products tend to develop problems after just one year of use. Our company has encountered this situation many times. As for large compressors used in the fertilizer industry, domestic manufacturers like Shengli Gas Turbine and Shaanxi Gas Turbine are not suitable for producing them – they are only capable of manufacturing small compressors.
The 40,000-ton air separation compressor for the first phase of our company’s large nitrogen fertilizer project uses a steam turbine centrifugal compressor manufactured by Shenyang Blower. Problems arose during the commissioning phase, but after they were resolved, the compressor operated normally, and it has been in service for 3 years now. The 48,000-ton air compressor in Phase II is a steam turbine centrifugal compressor manufactured by Shaanxi Gas Turbine; it came online in January 2007 and has been operating steadily for over a year without any abnormalities.
1. The centrifugal CO2 compressors produced by Jiaodaishan are performing very well at Anqing Petrochemical Complex! It can completely replace foreign technologies; in some aspects, its technical parameters already exceed those of foreign ones. Everyone should take a look! 2. For large-scale ammonia synthesis technology, domestic autonomy can be fully achieved; for example, the plants in Dezhou, Shandong are operating very well at present. 3. However, large-scale ammonia synthesis requires more investment from state-owned enterprises, and it is possible to take the opportunity to go abroad; as things stand, it is unclear when large-scale ammonia synthesis technologies with proprietary intellectual property rights will be widely adopted.
The machines produced by Weifang Shengjian in our factory are performing well; both the nitrogen-hydrogen and carbon dioxide compressors work fine. The key lies in maintenance and upkeep. Additionally, the composition of the gases plays a role as well – it can affect whether corrosion occurs
Our factory has ordered air compressors and boosters from Jia Da Sai Er; Jia Da Sai Er’s technical capabilities are among the best in China, and its energy consumption is also low. However, at present there is too little performance data, so not many companies dare to use it.
The centrifugal CO2 compressor supplied by Jia Da Sai has been installed in the first unit of the plant with an annual production capacity of 300,000 tons of carbon dioxide via stripping process at Yanhu Potash Fertilizer; it is now ready for operation, and its performance is under observation!
Many people upstairs mentioned the brand \"Jia Da Sai Er\". I really didn’t know much about this company before; I was quite uninformed. Could someone who is familiar with this company please provide some information on it?
I just checked online and it turns out it’s still a publicly listed company!
Jiaodaishier’s centrifugal compressor technology comes from a company established based on Xi’an Jiaotong University’s Compressor Research Laboratory; the compressors themselves are manufactured locally, but almost all of the control and regulation systems are imported!
Equipment from the year 2000 – the air compressors and ammonia compressors aren’t very good; they were manufactured by Shenyang Blower. The synthetic unit also keeps having problems; it’s equipment manufactured in Jinxi. However, the monitoring and control system is quite good: ITCC control combined with a Bentley 3500 monitoring system. The CO2 compression units were introduced from Japan, and they are indeed superior to domestic ones, although their control systems are somewhat outdated.
All 4 compressors used in synthesis are from Hitachi; those for steam turbines are from Mitsubishi, while those for gas use products from Shinpeiron. The urea is also from Shinpeiron. All of them have been operating stably for over 10 years. We’ve never used domestic products, and it’s not possible to switch to them either...
At Sichuan Chemical, all the compressors in their urea production plants have been replaced with Mitsubishi motors. The original turbine drives have been completely phased out, as they took too long to start up and caused significant problems when failures occurred
Could someone who knows this company, a colleague in the industry, please give a good introduction to Jia Da Sai Er? Would that be possible?