Impact of methanol separator type selection on system yield
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Our company has a plant with a capacity of 70,000 tons; the methanol separator used there is a conventional mechanical separator (with an inlet temperature of 40–45 degrees), and it basically has no internal components – only a mesh at the top. If this separator is to be modified, what type of structure would be suitable? What changes will occur in the methanol concentration before and after the modification, and what impact will it have on production? We would appreciate guidance from colleagues who have experience with similar modifications.
It is recommended to replace the screen with aerodynamically shaped blade-type separators; the housing does not need to be altered – only the screen needs to be replaced by blades. The advantages of using blades over screens are explained in detail in my posts. For more detailed advice, please contact me at 13552408712
Changes to the internal components will inevitably have a significant impact, but in actual operation, what effect does a small amount of liquid present have on the system?
It can be modified internally; currently, the blade shape is the most common. Each company has its own characteristics in terms of leaf structure. The most obvious effect of the blades relative to the mesh is that they can increase the net alcohol yield, thereby enhancing the production capacity of the facility. Additionally, a small amount of liquid present has an impact on the system: firstly, it prevents fluid shock in the circulation pump, and secondly, it reduces the overall energy consumption of the system.
I have a reciprocating unit here, and the issue of liquid presence doesn’t have a very significant impact. What really interests me is the effect that the vane separators have on the system. I found two manufacturers online who specialize in modifying such separators; both claim that their modifications can bring about some improvement. However, I’m skeptical about the actual results, as the water scrubber I had installed earlier was overhyped – it not only failed to increase production but actually reduced it.
It is indeed necessary to modify it into a blade format, as blades significantly improve the gas-liquid separation efficiency compared to mesh filters. I’m not sure which company’s technology you are familiar with Additionally, regarding the methanol water washing tower you mentioned, there are many salespeople who exaggerate its capabilities in order to close a deal; since I am not aware of the specific details of your factory, it is difficult for me to give an accurate assessment. However, based on our company’s experience over the years with user equipment, small-capacity methanol washing towers currently perform quite well
In fact, manufacturers of methanol catalysts have a more direct understanding of wash towers, while those from separator manufacturers lack sufficient expertise in this area
I’m from Xi’an Tongda University. :L
In previous years, wash towers have always used a structure with bubble trays covered by wire meshes, but the results were not very good – liquid accumulation at the outlet was a significant issue. Over the years we have adopted more advanced designs based on this approach, and this technology is protected by relevant patents. In recent years, customer feedback has been positive as well; visits to relevant companies for inspection are always welcome