Temperature rise requirement
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Temperature rise requirements for the initial startup of the hydrogenation unit: \"Heating the cold reactor must comply with the temperature rise limits for the reactor; that is, before the temperature at the lowest point of the reactor and the heat exchanger drops below 93°C, the rate of temperature increase must be kept below 30°C per hour. In general, the inlet temperature of the reactor shall not exceed 167°C above the lowest surface temperature.\" ”How should this sentence be understood, and why is this temperature requirement?
93/To prevent low-temperature temper brittleness, which can cause the steel to break easily; it also helps to relieve stress. The pressure should not be too high – design it at one-quarter of that level. A temperature difference of around 167 degrees is necessary to avoid thermal stress! Steel is too destructive! I guess that’s what it means