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Welcome to the eProcess demonstration video on the accumulator purge process.

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The accumulator is a vessel that sets directly below the multi-phase

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desander, or the produced water desander, to hold the separated solids.

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They are collected in this vessel for periodic.

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batch discharged from the process in this demonstration in the lab.

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We were using a 150 liter accumulator

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filled with 400 Micron sand. 

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This sand collection will be discharged at the bottom of

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the accumulator in this first video through a 1 inch line.  

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 To push the slurry or collected.

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solids out the bottom, we were using water introduced above the solids

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collection line at 15 PSIG.

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Approximately 1 bar pressure.

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the water in this case is introduced, in the slight circular motion.

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It's not necessary, but it does show a bit more

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cleaning action in this demonstration video.
The slurry is discharged

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quite readily out the bottom of this accumulator through this one inch

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line into the collection bucket and the accumulator is cleaned quite well.

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By this point the accumulator is substantially cleaned of solids and we

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will switch to the second demonstration.

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In the second demonstration video.
We are using the same setup, a 150 liter.

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Accumulator, with 400 Micron sand, we are using the 15 PSIG water

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introduced above the sand line again and discharging the sand slurry

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through the 1 inch line to the collection bucket, at, right.

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However, the difference is instead of pushing the sand off the bottom

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of the accumulator, we're using a 2-inch standpipe introduced all the

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way from the top to nearly the bottom with the 2-inch Gap.

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And we're actually pushing the sand

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up the standpipe and out.

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the top of the accumulator

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This shows that collected and settled solids within the accumulator,

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if removed at the proper timing are not hard packed.  

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 Now if you have a scaling or wax or asphaltene type issue, this may not

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work, but if you're using a clean water filled vessel with solids

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introduced from the top and you introduced and you remove them say

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every 24 hours at the absolute most.

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You can easily remove the solids at the bottom or at the top or even

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the side of the accumulator. 
We can get creative

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in slurry removal from the accumulator.
In this case,

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as you can see the solids being pushed down removed in a fairly quiescent matter.

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They're pushed up this 2-inch pipe and they're clean from the

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accumulator quite thoroughly.