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[mcdue]

I work on a plant and I have a problem of blocks in the discharge of a material that I go to expose, in addition to not being able to give me a reason I can not even find an effective solution.
We discard a fine powder material in a silo by picking it up with a compressed air system from a tank, the fact is that from a few months to this part the powder freezes, as well as in the pipes, in the silo (diameter around 5 m) and this I cannot explain it. form a sort of cap at about half height.
That said without me knowing anything, he decided to take hammers (with a rubber hammer) all the pipes and silos, doing nothing but aggravate the problem (if the silo does not deform the pipes yes).
the first thing that jumped into my mind, given the impossibility of disassembling or seeing inside the tube was to buy vibrators: I have to say they do their job, but they don't do it as efficiently as I expected.
Let's see what you propose, I am curious at least to find a why to fine powder that makes a cap on 5 m of diameter.
thanks to those who dedicate themselves.
m2

 

[Fulvio Romano]

What powder is it?
I had a similar problem, maybe just use inert gas that keeps out the air and therefore moisture. . .

 

[stevie]

we wish, besides I don't think the silo is airtight and so you can use the gas.
Is the plant always working?
I think that the solution of vibrators can work well, but a small automation must be done so that, through a timer, these functions also at a switched-out system.
for example you could run the vibration system for 1 minute each hour when this is turned off.
then of vibration plants there are an infinity, with characteristics in terms of different intensity and frequency.
Good job

 

[sampom]

which powders are (securely high hygroscopy)?
as said most likely it is moisture fault. the large mass of material is "self-compact" for the generated pressure, forming almost a single block.
What diameter does the pipe have?
Does the silo have 5mt conical bottom to the discharge diameter?
because you see that the product stops at half height, but the "tap" is formed below, at the filling of the drain. in that area you just have formed "groups" to bridge and block everything.

vibrators help (not always, because once it is blocked by vibrating it is even more compact), many also put " agitators".

greetings
Mar

 

[Fulvio Romano]

we wish, besides I don't think the silo is airtight and so you can use the gas.

You don't need to be airtight. the gas stays inside, just don't let it get caught to avoid exaggerating with the reintegration.

vibrators help (not always, because once it is blocked by vibrating it is even more compact), many also put " agitators".
greetings
Mar

quoti

 

[mcdue]

then, first of all I apologize for the delay, said exactly what we already have a gas system like what recommends fulvio, nitrogen for precision, but despite this still blocks.
the silo has a conical background, and in fact it is plausible what it says sampon, that is a block on the bottom.
I then acted this way and it seems to work: I changed the pipes folded by the hammers, I made the vibrator mount on the new and on the silo, that of the silo I made it vibrate cyclically in the meantime that they did not charge, then even during the load I made both vibrate. Now, I don't want to pull it myself, but today went smoothly.
I will tell you soon about any developments. . .