Converter problems
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This post was last edited by melao on 2011-12-31 at 11:17. Seeking advice； There are white fluffy crystals inside the tube of the converter pressure transmitter; they react with air, releasing heat and producing white smoke. When dissolved in water, they release heat and become strongly acidic. May I ask what substance this is, and what methods can be used to remove it?
The main component of this substance is SO3; in cold weather, this pressure guiding pipe needs to be heat-traced.
SO3 crystallization can easily lead to inaccurate pressure readings or even blockage of the pressure tubes.
Our device has experienced this problem; the operation needs to be adjusted
The pipes need to be insulated. They react with water in the air to form acidic mist; this mist is highly acidic. One can add some barium chloride to see if any precipitate forms. It’s likely that it’s sulfur trioxide
Reply to 2# melao: Trace heating isn’t the best solution; instead, instrument air purging should be used.
Reply to 6# boqing_zh: If instrument air is used for purging, it becomes impossible to monitor the pressure online.
Reply to 7# melao: Don’t blow too hard. What’s needed is to purge at a very low flow rate while monitoring the pressure. It would be even better if hot air could be used for purging. :P
Right now, it seems a bit annoying; I can’t view posts at all if I don’t reply to them
It should be sulfur trioxide; it might contain impurities, which is why it appears white