Why is the pressure at the bottom of the methanol recovery tower lower than the pressure at the top?
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As stated in the title, the methanol recovery tower of the etherification unit (with a side draw, 10 kilograms of steam, and a reboiler as the heat source) is designed with a bottom pressure of 0.3 bar (between 1/2 layer of trays) and an upper pressure of 0.29 bar. However, during normal operation, the bottom pressure of the tower is 0.28 bar while the upper pressure remains at 0.29 bar. If the bottom pressure is higher than the upper pressure, the load on the tower increases significantly, and the steam supply cannot keep up; solve this issue
Display error of the gauge: the normal top pressure in the tower is lower than the bottom pressure; the pressure gauge is installed in the gas phase space
Thank you for your help. I was wondering: if a pressure gauge is installed on the gas phase, could the reading be lower than the maximum pressure?
Thank you for your help. I was wondering: if a pressure gauge is installed on the gas phase, could the reading be lower than the maximum pressure?
If the pressure gauge conduit at the top of the tower is too long, accumulation of liquid during winter operation can cause errors in the readings shown by the gauge. First, check the gauge; if it is found to be functioning properly, it’s possible that the trays in the distillation section have fallen off, but since production is running normally, this possibility can be ruled out for now.
It’s probably your gauge that’s faulty; the pressure at the top of my recovery tower is kept below 0.1 MPA
For the issue with the pressure gauge, you can try using a different on-site pressure gauge