What are the causes of vibration in economizer I?
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I would like to ask the experts: There is a newly built sulfuric acid plant, and the economizer I experiences significant vibration at high load levels, but no such vibration is observed at low load levels. What could be the reason for this? The conversion process is 3+1. Thank you!
The water-side inlets and outlets of the economizer are reversed, causing water hammer
I think it’s caused by the too fast flow rate inside the water-side pipe. When the load is high and evaporation is significant, coexistence of steam and water may also occur! For reference only!
High vibration indicates that the water inside the pipe has vaporized; you suddenly added too much water
There is mixed steam inside the economizer; under normal operation, no steam should be present. Check the water temperature and pressure in the economizer to see if the pressure is low!
This post was last edited by in the blink of an eye on 2019-6-19 at 22:36. It’s also possible that the conversion reaction occurred at a later time, resulting in an excessively high temperature of the flue gas entering the economizer; this led to an excessive thermal load on the economizer, thereby forming a vapor-water mixture.
Are there any process parameters? Pay attention to the temperature of the last economizer water; it should be 40 degrees lower than the saturated water temperature℃
Thank you! Is there any theoretical basis? The temperature of the water at the outlet of the last economizer is around 230–248 degrees (as indicated by the DCS thermometers; the temperature varies depending on the load), and it is roughly the same as the temperature in the steam drum, with a difference of no more than about 10 degrees.
Thank you! The outlet temperature at the end of the conversion process is around 415–435 degrees, varying depending on the load.