In wax oil hydrocracking, when the hydrogen circulation pump stops and a pressure release of 0.7 is applied, if the temperature exceeds 450 degrees, should the 2.1 setting be activated?
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The technician said that during an emergency pressure release at 0.7, there would be no significant temperature rise; with a high air flow rate, overheating would not occur. However, the temperature in their fourth bed reached as high as 470 degrees
I think it depends on the trend analysis specifically. If it is at the end of the pressure release process. Because the pressure release is rapid at first, the temperature does not rise too high. The temperature is rising, but it’s still necessary to watch the trend of that rise. If the speed is very high. If there is no trend of reduction, pressure should be released to 21 bar immediately. If the temperature trend is gentle and stable, with a downward trend. There should be no need for high-speed pressure release anymore. . My personal understanding is as follows.
When flying above 427, it only takes a few minutes to reach 800! After 450, it’s necessary to operate at 0.7, or else there will be hydrogen emission, pressure release, and temperature reduction