Process nozzle cooling water coil
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Hello, colleagues. The cooling water coils for the 3.2M process nozzles that are currently in use – are they formed by bending a single tube piece into shape, or are they made by welding together three separate sections? I would like to discuss with you whether there are any significant differences in performance between those that are formed as a single unit and those that are made by welding separate sections together
I am a designer at a coal chemical equipment manufacturing plant. I have developed samples of cooling water coils for 3.2M process nozzles that are formed in one step, and I would like to discuss this with everyone to see if there is any practical value in this research direction of mine.
Generally, when purchasing burners, the technical specifications require that the coiled element be formed in one step. Forming it in one step reduces the number of welding points, which in turn decreases the potential for leaks. After all, burners are used in very harsh environments, and more welding points mean more potential points of leakage.
Yes, that’s how I understand it as well; that’s why I’ve been researching the bending process for forming cooling water coils in a single step. I have already managed to develop cooling water coils that can be formed in one step, but they haven’t been brought to market yet. Many nozzle manufacturers don’t pay enough attention to this aspect, believing that whether the coils are made in separate parts or as a single unit makes no difference to them.
For well-known burner manufacturers, it is essential to achieve one-piece molding of the burner cooling water coil. For example, well-known manufacturers of water-coal slurry burners such as Aerospace 11th Institute and Shaanxi Xinli have very high requirements in this regard. I have little contact with other burner manufacturers, so I’m not very familiar with their requirements in this regard.
Shaanxi Xinli currently uses separate cooling water coils; the 2.8M process nozzles feature integrally formed components, while the 3.2M process nozzles have always been constructed through segmented welding. As for the 11th Aerospace Research Institute, I didn’t pay special attention to that
This aspect should be explicitly addressed and explained in the tender technical documents or technical agreements. For users, aside from considerations related to performance, pre-formed coils are certainly more reliable to use, and most users prefer to choose those that are pre-formed.
I can now manufacture cooling water coils that are formed as a single unit, but I’m not able to bring these coils directly to the market; therefore, I still need to find burner manufacturers to work with. I hope my colleagues will be willing to help