Yes, You Do Need Advice.
With a ship unloader design capacity of 5000th-1 you are not going to get 5000th-1 to the pipe conveyors.
Thirty kilometres of pipe conveyor carrying 2500th-1 apiece would be no small matter either.
Screw type unloaders are rather unreliable. You can even buy them second hand, little used, through these forums they're that good. Are you sure the chain bucket jobs are able to satisfy your stringent pollution controls? They also kick up quite a bit of dust and they are no more reliable either.
Your environmentally safest option is suction unloading, if the big machines are still around and the coke is dry enough. You would need 4 of them, at least, and the power draw will be about 1MW each. Your ship might not be long enough (what's the vessel classification) to effectively accommodate the machines alongside.
Basically your berthing time is far too short. Use the ship unloading equation to determine a realistic unloading rate. Then apply the local tidal conditions as appropriate and as a reasonable Master might see fit. Do not try to compare loading and unloading rates. Any clown can throw dirt into a box (once the loading manual is available). Cleaning the box out is quite a different matter.
P.S. Where has Royal Haskoning/Posford gone from your equations?
P.P.S. Shouldn't this thread be in the Shiploading etc. forum? ■
Ship Unloading & Pipe Conveying Of Pet Coke
Dear Louispanjang, Thanks for your advise. The vessel size in the beginning shall be Panamax-50,001 dwt - 80,000 dwt approx and later Cape size 80,001 dwt--1,20,000 dwt.Please provide information where suction unloading(pneumatic unloaders) is being done for unloading of coal.
For storage purpose there shall be dome type of silo having 1,50,000 ton storage capacity. Please advise the type of dome,stacking and reclaiming system.
Regards, Anil Seth ■
Transporting Coke 30 Km By Pipe Or Non-Pipe??
It may be possible to transport coke over 30 km by pipe and non-pipe conveyors. There are facts you need to address:
1. How much sealing is required - nothing is perfect. Pipe conveyors leak product. Sometimes a lot of product
2. Identify the terrain to be negotiated - to determime the belt belt for the job - pipe conveyors consume about 3 x the power of a well design trough belt. It is possible to reasonably seal a trough belt from expunging airborne dust into the atmosphere. It takes know-how. Trough belts can track to nearly the same route as a pipe conveyor if you know how.
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In rough terms the power difference is:
a. PIPE = 1000 kW/1000 meters; then for 30 km = 30,000 kW if you are lucky and the terrain is not accute and often
b. TROUGH 275 kW/1000 meters; then for 30 km = 7,250 kW, if you know how.
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Belt width selection if rough terms - without knowledge of the terrain:
a. PIPE = 2800 mm - needs special construction to stop seam rotation and spillage
b. TROUGH = 1800 mm with a sealing system
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We have extensive knowledge of pipe and trough conveyor designs and associated belt construction requirements.
CAll if interested to learn more. ■
Corection On Power
Sorry,
7250 kW should be 8250 kW.
Need vino to engage circuits. ■
Special Note On Pipe Conveyors
There is a prototype belt that is being built now, in China, that will exceed your specifications for the pipe conveyor capacity. ■
Pipe Conveyor
Dear Nordell, Thanks for your valuable advise. I know your expertise and have a great regard for you.Just small introduction, I was with Naveen projects working under with Mr. A.R.Singh for Birla Copper Conveyor where your good self was Adviser.
For the last 10 years I am a member of this forum and have learnt lot of things from the experts like you and Mr louispanjang and sharing the same with my Valuable clients. I can understand the language of dear louispanjang, but still, I find lot of information in his comments.Now, I have been qualified for this prestigious job which is going to come in very near future.
Regards, Anil
Originally Posted by nordell
1. How much sealing is required - nothing is perfect. Pipe conveyors leak product. Sometimes a lot of product
2. Identify the terrain to be negotiated - to determime the belt belt for the job - pipe conveyors consume about 3 x the power of a well design trough belt. It is possible to reasonably seal a trough belt from expunging airborne dust into the atmosphere. It takes know-how. Trough belts can track to nearly the same route as a pipe conveyor if you know how.
----------------------------------------------------------------------------------------------
In rough terms the power difference is:
a. PIPE = 1000 kW/1000 meters; then for 30 km = 30,000 kW if you are lucky and the terrain is not accute and often
b. TROUGH 275 kW/1000 meters; then for 30 km = 7,250 kW, if you know how.
----------------------------------------------------------------------------------------------
Belt width selection if rough terms - without knowledge of the terrain:
a. PIPE = 2800 mm - needs special construction to stop seam rotation and spillage
b. TROUGH = 1800 mm with a sealing system
----------------------------------------------------------------------------------------------
We have extensive knowledge of pipe and trough conveyor designs and associated belt construction requirements.
CAll if interested to learn more.
■
Ship Unloading & Pipe Conveying of Pet Coke
Suitable Ship Unloader and Pipe conveyor for unloading Pet coke
We need advise from the Experts on this forum about suitable ship unloader to unload Pet-coke from 1,20,000 dwt vessel@5000tph (design capacity)
Due to strict pollution norms we can not use Grab type of unloaders. The option is now either to use SCREW TYPE UNLOADERS OR BUCKET TYPE CONT. UNLOADERS keeping in view of soft nature of pet coke. We envisaged 2 ship unloaders on jetty each having design capacity of 2500 tph.
We also need Expert advise about maximum capacity of a pipe conveyor. The discharge from two unloaders from Jetty to Dome storage shall be @ 5000 tph ( 2 shipunloaders @ 2500 tph each and single pipe conveyor is not advisable for more then 2500 tph capacity, the length of pipe conveyor is about 30 km.
Best regards
Anil Seth
Libran Engineering&Services ■