30 m diameter, 30 m high with two outlets in the floor and you are getting a buildup of material in cliffs,why am I not suprised

Was the sulphur tested for time consolidation BEFORE it was loaded into the dome?

I suppose it's down to cutting an access way (or several) into the dome and carefully digging out with a mechanical excavator. Not for the feint hearted!

The attached photo's are animal feed meal, but illustrate the problem.

Attachments

asloaded (JPG)

afterstorage (JPG)

■

Sulphur melts very easily and you should consider fitting steam heating coils around the outlets mentioned and lay some steam lines in the floor. Overburden weight should then squirt the mess out of the bin to who knows where. A small priller will return the melt to the usual particulate form. ■

Originally Posted by nirmalcb

Hi Friends

I like to post our problem which we are encountering with our Solid Sulphur Silo.

Huge cliffs of solid sulphur are forming inside the silo. As a result the dead volume in the tank has increased which is hindering our shipping commitment.

We are looking for temporary and permamnet solution to remove the dead weight sulphur from the silo which have restricted access.

Silo Details:

1. Flat bottom, dome shaped steel bolted type.

2. We have only two slide gates at 3'O Clock and 9'O clock positions.

3. 30 meter height and 30 meter dimeter.



Please share your thought and information to solve our problem.

Thank you in advance.

Gentleman, The extraction system inside the silo is not working properly.The dia. of silo is more as compare to its height.You should modify the inner extraction system of the silo and also need to provide more slide gates since dia is more.

If you can provide the inner extraction system arrangement dwg. then we will be able to give you solution of your problem.

Regards, Anil

Libran Engineering&Services,India

www.libranengineering.com

libranengineering@gmail.com ■

Originally Posted by anil seth

Gentleman, The extraction system inside the silo is not working properly.

He didn't say he had an extraction system?? just two slide gates. ■

I think your problem will require considerable lateral thought!

My first thought is a large mobile screw conveyor (in a tube not U trough) with an open end. Cut a low level hole in the dome walls, feed in the open end of the screw so it cuts it's way into the stored material and extracts it. With your size of dome it might take a while.

Anyone got other ideas? ■

I doubt there is anyone whch such a screw conveyor on the shelf, so anyone who offered to do this job for you would have to design and make/buy it before they could start work.

Maybe someone has a second hand mobile pneumatic discharger that could be used to vacuum it out, but that's not going to be easy if the material won't flow to the intake nozzel. ■

Originally Posted by intech

please see our website www.intechenvironmental.com

for our silo cleaning services

And what would be your method for extracting material from this guys dome■

Try contacting www.pneumat-europe.com

Have a look at the web site, there are a few options to consider there.

There is a Bin Whip system, it is a rotating flail system powered by hydraulics.

There is also the cardox bulk breaking system.

If you go to the website you will be given a better idea of the options available to you. ■

I have used the Gyrowhip system myself and found it quite lacking in power and control in comparison to the Binwhip system.

http://www.pneumat-europe.com/whyhydraulicnotair.php

The link above is a few reasons why we see a hydraulic system to be better than an air system.

I obviously can not offer you a solution to your problem without seeing the problem for myself. At the moment all I could offer is a stop gap solution of whipping the sulpher cliffs down and vaccing the sulpher with a vaccum truck.

I hope you can find a solution to your problem soon. ■

Perhaps he could post some pictures to show his problem? ■

Originally Posted by designer

And what would be your method for extracting material from this guys dome

sorry !

the methods can include giro-whip, cardox, vaccum equipment, irata roped access ■

I think it's time for you to post drawings of your dome showing access points where entries may be made, photographs showing the actual condition of stored material in the dome so that anyone interested in assisting you providing equipment to empty the dome has something to work to. You must also expect to pay someone to visit your site to assess the problem first hand.

I would also be interested to know who has provided you with this system of storage without an adequate means of extracting the stored material. ■

Is this who I know as A.O. Smith Harvestore?

What unloader was provided to extract the sulphur?

Anything like this http://www.harvestore.com/PDF/XLUnlo...ger8408.pdf ?

How big are the slides in side walls?

If the prills flowed like grain how were you supposed to extract the remaining material once gravity flow had ceased?

I notice you show a cascade loading chute. While this may minimise damage to prills when loading, it can be be a serious impediment to flow when unloading, particularly if time consolidation has taken place. ■

Originally Posted by nirmalcb

Hi Friends

I like to post our problem which we are encountering with our Solid Sulphur Silo.

Huge cliffs of solid sulphur are forming inside the silo. As a result the dead volume in the tank has increased which is hindering our shipping commitment.

We are looking for temporary and permamnet solution to remove the dead weight sulphur from the silo which have restricted access.

Silo Details:

1. Flat bottom, dome shaped steel bolted type.

2. We have only two slide gates at 3'O Clock and 9'O clock positions.

3. 30 meter height and 30 meter dimeter.



Please share your thought and information to solve our problem.

Thank you in advance.

As I am on the out side looking in:

The implementation of a carhoe with a clam shell bucket would allow the safe and efficient breaking and dropping of the sulphur for extraction.

If a long boom arrangement is purchased it will easily reach the edges of the silo from the center of the silo.

The carhoe allows the operator a closed safe cabin to perform the work of digging.

The installation would take a bit of time but once it is installed it will ride on an elevated platform out of the way of the delvery machineries for the sulphur.

I have provided the web address for you below

www. carhoe.com ■

Wow, a flat bottomed silo with no discharge system.

Firstly, sulphur dust is explosive so you will need to take care when emptying the silo or you'll be looking for a new silo

With such small holes a pneumatic unloader as used to unload barges could be used pushing the suction pipe through the holes formed by the slide gates.. But if the sulphur remaining in the silo doesn't flow all you will end up doing is creating holes "drilled" into the sulphur. You could create these holes close together and hope for a collapse, extract the collapsed material then "drill" some more holes.

But 20" x 14" is a small hole to work through, I'm sure you will need to enlarge this.

You could also use the screw conveyor I described earlier (or an en-masse elevator equivalent) but you would have to adopt the same "drill" and collapse method of working.

The alternative is from inside the silo to work away at the sulphur as described earlier by "digger".

Long term you'll need to a permanent solution to extract material from your silo. Be prepared for it to be expensive and even require the replacement of the silo.

Attachments

sulphur (PDF)

■

Good afternoon,

I hope wednesday finds you in good stead,

What you have in the picture there is an

ensilage unloader for an upright silo used

to store cattle feed

The ensilage unloader uses electricity

delivered using a trailing cable that is extended

and retracted with the ensilage unloader to power the

unloader fan and auger using a capacitor to provide

additional amperage energy)which cuts the material and

transfers the ensilage to the impeller fan that blows

the silage to the transfer chute which is located on

the outside of the concrete or wooden silo.

The ensilage unloader is centered in the middle of

the silo with a tripod which rests on the inner edges

of the top ring of concrete blocks(or wooden sill) of the silo.

A wooden or metal roof is used for silo

The ensilage unloader is raised and lowered with a wire

rope winch from the ground.

When in operation the unloader is resting on the exposed

layer of ensilage and continues to cut and auger the ensilage

to the fan housing where it is blown into the transfer chute to

the bottom where it is either dumped into a paddle conveyor or a

silage cart which can be battery powered or employing a caster

wheeled system.

The ensilage unloader in the picture is a unit that is small in size typically 8 to 12 feet in diameter.

It uses a drive drum near the base of the auger powered by a gear reduction drive and the units

develope huge amounts of availabale torque and must have the support wheels to reduce skipping

over the ensiliage layer-the bar you see at the lower right is the two piece tube(inner and outer with

a bracket connected/welded to the end of the outer tube that simply rests on the steel ring hoops

which is used to hold the walls of the silo in the proper circle to maintain its shape

The ensilage doors are located behind the steel hoop ring and open inward as there would be

inadequate room to open outward as the hoops would limit travel of the door( the doors are also large

enough that safe passage would be impossible while climbing the metal ladder steps that are cast in

the exterior of the concrete staves(tapered blocks) that are placed used to anchor the ensilage

unloaders delivery chute to the exterior drop chute used to blow the ensilage to the delivery chute

As the ensilage is removed from the silo an unlaoding door is opened to allow the ensiloage unloader

to continue to delver ensilage to the drop chute(the concrete or wooden silo has silage doors from top to

bottom to allow efficient removal of silage.

The cutting cross auger may also employ a shaft driven spiked wheel powered by a reduction gear

on a separate arm which pushes/pulls the auger as it rotates around the silo.

As the ensilage is removed the amount delivered to the drop chute becomes less and less and the wire rope winch is used to lower the ensilage unloader as it removes the ensilage.

Many ensilage unloaders are larger and use what is referrred to as ring drive system where a steel ring employed as part of the unloaders framewhere the unloader utilizes a gear drive motor where the gear teeth enter a machined square hole which provides the fulcrum to allow the auger to rotate around the surface of the ensilage layer.

The unloader would create to much heat In the case of removing sulphur and the augers typically employ carbide teeth to rip the silage and allow the auger to cross convey the ensilage.

A bottom ring drive auger is used by Laidig for ensilage and wood wood chips but you would be dealing with the same issues of spontaneous combustion.

I hope I have not confused the issue.

I want you to be an infromed consumer of available information with regard to your predicament with the suphur silo. I should have more detailed material for the carhoe to deliver later today my time GMT-5 Hours.

lzaharis ■

It looks to me as if you need a flat surface for the wheels to run on.

Will you have one?

This might be a better bet for top unloading

http://www.eurosilo.com/content/view/15/191/lang,en/

Or this for bottom unloading

http://www.tcaffiliates.com/common-d...-unloaders.pdf ■

Originally Posted by rousseau franck

to avoid to get product like concrete in silo

Know your product BEFORE you put it into storage, then you won't have problems getting it out of storage. ■

We have resolved the exact same problem inside a 26m dia sulphur silo, by fitting the bottom with vibrating modules. We can document you completely on this projec t. Just get in touch with

jcp.silexport@wanadoo.fr ■