Issues with the upper and lower limits for temperature alarms in benzene tanks
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Question: The crystallization point of benzene (on a dry basis) is greater than or equal to 5°C. The storage tank is heated using external coiled pipes, and a remote temperature sensor is installed on the wall of the tank to provide an alarm function. What are appropriate values for the upper and lower limits of this temperature alarm? The temperature of the warehouse storing benzene should be maintained at 10–30°C. Note that the 2000-liter benzene tank is equipped with an external coil for heating. After a low-temperature alarm is triggered, it takes time to heat the benzene tank and raise its temperature gradually; therefore, I think the low-alarm value should not be set at the crystallization point, but rather above it. So, what are appropriate values to set for the upper and lower limits of the thermometer’s alarm?
The upper and lower temperature limits for our benzene tank are 15 to 35 degrees, so these two values are used as the alarm settings. I hope the experience can help you.