There is no correlation between the bed temperature of the methanol synthesis tower and the drum pressure
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The bed temperature in our plant is 255°C, and the drum pressure is 3.8 MPa; these values do not match those indicated by the saturated steam temperature and pressure gauges, although the temperature and pressure readings themselves are normal. I asked two factories and they encountered similar situations. What’s going on here, experts?
Could you provide a detailed explanation of the tower’s process?
The tube side carries syngas, while the shell side carries boiling water
The bed temperature is the temperature on the catalyst side; it certainly does not correspond to the drum pressure, as it is the drum temperature that represents the temperature of water and steam.
The hotspot temperature should be taken as a reference, with a temperature difference of within 10°C
Because your thermocouple measures the temperature of the catalyst at the center of your tube, while the temperature corresponding to 3.8 Mpa of steam is the temperature of the water on the shell side, which is approximately 248°C. Due to the \"gradient effect,\" what you are observing is a normal phenomenon; the larger the diameter of the heat exchange tube, the greater this \"gradient effect\" becomes.