Problems with the unit purge pump
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During the commissioning purging and water washing of the unit, what should be done with the pump? Do I still need to remove the pump’s filter screen? I’m not quite sure; please share your thoughts, thank you. Bonus points
When purging with gas, the pump’s filter must definitely be removed. But it must be installed during the pump’s water pumping test run to prevent impurities from entering the pump body.
When using nitrogen purging, it is advisable to isolate the pump, as pumps are often installed at lower levels; during nitrogen purging, drainage should be carried out from these lower levels, which allows impurities in the pipes to be flushed out. During water tests and the initial phase of operation with material flowing through the pump, it is necessary to use filters with a larger mesh size at the pump’s inlet in order to prevent impurities from entering the pump; of course, it is essential to clean these filters regularly
During the startup purging process, it is generally necessary to bypass the pump (1. Dirt can get into the pump; 2. Uneven temperatures can damage the pump’s seals and impellers). The filter screen of the pump cannot be removed during water flushing, but a filter screen with a finer mesh size can be installed instead.
Our catalytic unit’s cold oil pump doesn’t have a filter – what about yours?
The pump should be removed during purging to prevent impurities from entering the pump. It is recommended not to remove the filter screen during water operation, but it should be cleaned regularly; the cleaning frequency is high at first, and it decreases as more impurities are filtered out
All mechanical pumps need to have filters, with different mesh sizes
For purging and washing, there is no need to remove the filter screen, but we must clean the pump’s filter screen every time we stop the machine for maintenance
I would like to ask the teacher: should the filter be cleaned as soon as possible after the startup purging is completed? Are there any specific regulatory requirements? Please help to find out
For instruments, valves, filters, traps, and other devices encountered during the purging and washing of pipelines, they must be removed or temporary short-circuiting measures must be applied to them; they can then be put back into use after the purging and washing are completed.