Is it necessary to install a low-flow interlock for the feed pump in the hydrocracking reaction?
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At present, many catalytic cracking unit reaction feed pumps do not have low-flow interlocks; if the reaction feed shut-off valve is closed, could this lead to pressure buildup at the pump outlet and thus damage to the pump?
The last edit to this post was made by Passerby_jffdn on 2022-7-24 at 15:22. Sequential actions include not only closing valves but also shutting down pumps and a series of other actions
Firstly, a low flow low-low interlock must be installed on the reaction feed pump； Secondly, all reaction feed pumps have a minimum reflux line; when the reaction feed valve is closed, the minimum reflux line should be opened wide, or automatic control should be installed to meet the flow rate requirements at the pump outlet.
Generally, such pumps are equipped with a low flow rate interlock; this interlock not only stops the pump but also shuts down the heating furnace to prevent the furnace tubes from burning out