Thoughts on the location of thermocouples in the low reaction temperature interlock of catalytic cracking units
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Ladies and gentlemen: Interlocks for low reaction temperature in catalytic cracking units are available in all such units. Please discuss why the thermocouple for this interlock is installed at the outlet of Reactor 1 Would it be more sensitive if it is placed above the raw material nozzle? Are there any other considerations?
There will be significant disturbances in the area above the raw material nozzle, and the temperature may also be difficult to measure due to the misting steam. At the outlet of the reactor, the conditions are much more stable. To obtain an accurate representation of the actual temperature in the lift column, it is necessary to add another instrument; the pressure measurement points should be distributed evenly, and a configuration such as three-out-of-three or three-out-of-two can be used.