What are good control methods for large radial temperature differences in a single bed of a refining reactor?
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I would like to ask what good control methods are available to address the large radial temperature difference within a bed in a refining reactor? Please give me some advice!
The catalyst must have coked; you can try increasing the amount of circulating hydrogen. In cases of severe coking, the only option is to shut down the operation to regenerate the catalyst.
Catalyst coking or uneven catalyst packing can cause flow imbalances. In cases of severe coking, operations must be halted to remove the coked catalyst; if the issue is related to packing, it is necessary to refill the catalyst
Try increasing the amount of circulating hydrogen, keep the inlet temperature as low as possible, and shut down the unit for head removal.
1. Closely monitor changes in temperature differences to avoid hot spots； 2. Monitor the pressure drop across the entire reactor; if it approaches or exceeds the maximum allowable pressure difference between the inlet and outlet of the cyclohydrogen compressor, shutdown is the only option – for reference only