Dear navneeth,

I assume that the sea sand at the seashore is wet.

As this thread is posted under the section of pneumatic conveying, I also assume that you are hoping for a pneumatic conveying solution.

However, this is a dredging technology activity.

Dredging technology uses specially designed equipment of a great variety of types.

Consult a nearby or internationally operating dredging companies for a quotation.

Forget about the pneumatic conveying option and transfer this thread to the section of hydraulic conveying.

Success

Teus ■

Dear Mr. Navneeth

Use of slurry pipeline in dredging operation for transport of sand from sea shore to ship is a common practice. We are actively involved in testing and design of slurry pipeline sytem in Fluid Mechanic Laboratory at IIT Delhi. Please, contact me for details.

Regards,

D.R. kaushal

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Dr. D.R. Kaushal

Assistant Professor

Civil Engineering Department

IIT Delhi, Hauz Khas

New Delhi - 110016

INDIA

Off.: Block V, Room No. 305

Mobile: +91-9818280867

Phone: +91-11-26591216

Fax: +91-11-26581117

Website: http://web.iitd.ac.in/~kaushal

Email: drkaushal.iitd@gmail.com

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Originally Posted by navneeth

Dear All respected members,

Please advice me if anyone could help me in finding a solution to find the apt method to to transfer sea sand from sea shore to ship at a rate of 300 - 500 tonnes per hour to distance of 450 meters with minimum of 8 ends.

Please advice me.

Regards

Navneeth

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The problem is simple to solve but the pipeline is not;

A shallow sea berth is another issue due to the cargo weight.

What about the ability to trim the load to maintain an even ship as it is being loaded?

With that amount of sand production desired you will have thousands of tons of sea water to deal with.

What is going to happen with all the seawater? That is the major issue that must be dealt with; I am assuming you do not intend to ship sea water in the ships hold with the sand as the weight will be considerable reducing the cargo weight in the ships hold.

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Navneeth, you have to have very long chat with a dredging firm about this simply from the basic point of the residual sea water.

sea water or any water used for any dredging operation is the component used to move the dredged material.

Perhaps the best thing to do is hire a barge or two from a tug boat firm;

buy several long sections of water well screen-one per barge to allow the sand to drain its seawater into the well screen quickly and simply repeat the process untill your job is done- it is the easier way to do this as you can hire a small Mud Cat dredge to do the dredging with a floating piping system to the barges.

You will need to install a sump pump to take away all the sea water- easily done with large diameter well casing screen and a mud pump or electric sump pump rated for sea water lowered into the bottom of the barge inside the well screen with a poly rope or painted chain to pump the seawater off the barge or barges.

it will take a very long time to drain the sand of sea water unless you use a mobile screening an dewater plant such as those used by oil and gas drilling firms

but that will be to slow for what you want to do.

Using seagoing barges and sump pumps will be somewhat faster as the water must be gotten rid of unless you have no worries about cargo wieghts.

You must remember that you will be paying to ship a water cargo as well as sand unless it is dewatered!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

In any case you must realize the unloading implications regarding wet type clay muck or sand from a compressed state such as a ships hold or a barge?

The actual resistance from the actual act of trying to physically extract a bucket of dirt sand or clay is huge simply from the percolation and settlement of the material.

It takes a huge amount of mechanical energy to remove compacted wet muck of any kind as it becomes one simple mass of material; I have personally witnessed

a cable crane with a clam shell bucket pulled over due to the amount of lifting energy required to remove a bucket of muck from a barge.

lzaharis■