12 pairs of S-shaped nozzles for rod reduction furnaces
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Most of the reduction furnaces in our workshop are equipped with straight nozzles; only one furnace has an S-shaped nozzle. There are 4 nozzles in total, one in each direction of east, south, west, and north, while 2 out of the 5 air inlets have been blocked. There are more rods to replace compared to other furnaces. I would like to ask whether installing S-shaped nozzles can make the gas field distribution in the reduction furnace more uniform, and whether this could be the main cause of rod inversion
To conduct a comprehensive analysis, it is impossible to conclude from your description that the issue is caused by the nozzle.
Reply to 1# Let’s take a look~ The reasons for polysilicon rod failures are quite complex. We also experience rod collapse here frequently, and there are many reasons for this – temperature, the distribution of gas fields inside the furnace, and current stability all play a role. We are also working on solving this problem of rod collapse; if you’re interested, we can discuss it. Are you from Jiangsu Zhongneng?
Reply to 3# Zero Degree Freezing Point: Thank you for your reply. I work at Zhongneng. Where do you work? There are many reasons for this issue; now let’s conduct a specific analysis focusing on the energy field. If you have any suggestions, I would be grateful if you could share them
Reply to 2# zhangweicheng: The impact of the nozzle on the air field is likely the main factor. I would like to ask what’s different about the S-shaped air field distribution compared to other types?
Reply to 4#: Let’s go and take a look~ I’m from Xinjiang. I’m not sure what the situation is regarding the nozzles used there. In our area, there is one nozzle in the middle, with 8 straight nozzles surrounding it. I wonder why S-shaped nozzles are used there, and what the reason is for blocking out two of the nozzles.
Reply to 6# Zero Degree Freezing Point: Only that unit on our line has it; the others also have straight nozzles, while S-shaped nozzles are more commonly used on other lines. The two S-shaped nozzles are directed in the same direction, so the one that is originally trapped in between has to be blocked. I asked, and they said that this can also create a uniform energy field, with the inner part as well as the inner side of the outer ring growing faster. As for what kind of model it is, it is still under investigation.
May I ask what an S-shaped nozzle looks like? Could you explain it to me in detail? My QQ number is 306307742, thank you!
Reply to 8# lwh5922086: There’s nothing special about it; it’s just a nozzle on the S-shaped steel pipe street
There are many reasons for the issue; high temperatures can be a factor, as can the use of small silicon cores. The air intake volume and airflow distribution also play a role