Regarding the centrifugal pressure drop
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The single-stage pressure drop in the settler (10.5) and the total pressure drop (15) increased to around 11.5 and 16.5 respectively, while the pressure drop in the primary spinner remained unchanged at 3.3. Could everyone please help analyze what might be the reason for this?
Has the load changed, has the content of catalyst fines changed, and have the operating conditions in the reaction section been adjusted?
The amount entering the lift pipe is relevant (including feed oil, reprocessed oil, terminator, and various types of steam); moreover, the pressure in the settler is also important
There may be a certain degree of coking that causes an increase in pressure drop
Check whether there are any changes in the mass flow rate of the reaction feed, steam, etc., entering the lift pipe. If not, then the current pressure drop is only slightly high, so its impact is minimal (it is necessary to analyze this in conjunction with the operating time of your cycle – how long has the unit been running continuously). ）
It is closely related to the feed rate; special attention must be paid to this during operation, as significant changes may cause problems!
An increase in single-spin load leads to two effects: first, a decrease in the efficiency of coarse spinning, and second, changes in catalyst screening