Re: "Flow Dynamic Conveyor"
Are you asking about what I understand as an "air supported belt conveyor" ?
The following link gives a description.
http://www.ckit.co.za/Conveyor/Aeroc...Functional.htm ■
Re: "Flow Dynamic Conveyor"
Dear Brian Wu,
If you find limited suppliers, for particular type of equipment, the other option is to invite bids for two types of equipment / system fulfilling functional needs. Then evaluate both the systems for total of initial investment, maintenance cost, operating cost, reliability, availability of spares etc, and choose the system which is economical in real terms (comparison of evaluated price) ■
Coal Handlings
Dear Brian
We are from Clyde materials handling specialises in coal handlings and we have tons of references in handlings coal.
Please visit our websiteat www.clydematerials.com.sg ■
Re: "Flow Dynamic Conveyor"
Dear Mr. Brian Wu,
Conveyor Dynamics, Inc. (CDI) has designed many conveyors in the 10 km length class you nominate. PLease see our website for some references. We also have first hand technical knowledge of the air-slide conveyor design and its physics.
For the air-slide concept, we have developed advanced Computational Fluid Dynamics (CFD) codes to further the understanding of the air-slide concept. CDI has incoporated these advancements into BELTSTAT for equivalent design and analysis given to conventional conveyors. This proprietary code is now the property of Martin Engineering in the USA. We still retain the understanding of its use and can assess its application against varies competing designs.
I am interested in the FDC approach. How does it differ from the standard air-slide? What advantage does Kawasaki claim? Is it justified?
I believe the two 800 MW boilers will consume sufficient coal to give a conventional conveyor the ability to favorably compete against the air-slide conveyor. I can offer a free review of your proposed concept to identify difference in scope and project costs for two competing concepts.
If you feel this to be of value please contact me at:
Lawrence Nordell
President
Conveyor Dynamics, Inc.
1111 West Holly Street
Bellingham, Wahinghton 98225
USA
ph: 360-671-2200
fx: 360-671-8450
email: nordell@conveyor-dynamics.com
website: www.conveyor-dynamics.com ■
Re: "Flow Dynamic Conveyor"
Mr. Wu
My above note refers to air-supported conveyor belt when referencing the "air-slide".
Lawrence Nordell ■
Dynamic Flow Conveyor
Dear Mr. Wu
Plese let me know how is mentioned conveyor driven
whether it is provide by some electric motors in such way I think that our company may suggest such motor. ■
Re: "Flow Dynamic Conveyor"
Hello.
I am a mechanical engineering student from Instituto Superior Tecnico, Lisbon. I am currently in the Netherlands doing my final project. The subject I study is the air-supported belt conveyor.
During the research I noticed the little amount of information available in literature and Internet. The companies that design and install air-supported belt conveyors are only a few. Some of them are:
http://aerobelt.co.za/works.htm
http://www.hudcoinc.com/conveymore.html
http://www.tramcoinc.com/
http://www.hendrikent.com/pages/HoverG2.html
http://www.aeroco.co.za/pinfooverview.html
The fact that there is no current applications with such a long length (~10 km!), and not so much experience in general, is a significant drawback.
Depending on the support geometry the initial costs may be higher (or not ) than other conveyor systems. The capacity to negotiate curves is limited.
The results I obtained with a model of this conveyor showed that the overall power consumption and belt tensions can be reduced in comparison with the conventional troughed belt conveyor. In what concerns power consumption and belt class the aero-conveyor presents the main advantage. For other aspects as belt wear and stability, this conveyor competes favorably.
My opinion is that this system is worth applying, specially for this length, but the lack of experience is also important... it makes taking in consideration other alternatives. ■
Original Aeroconveyors
A few months ago Aeroconveyors have studied a somewhat similar high-volume coal feed situation, albeit the more customary length of a few hundred metres per conveyor, adding up to about 1,5km.
This study revealed that Aeroconveyors would have distinct advantage, amongst others:
* Reduced power requirements.
* Higher speed, narrower belt.
* Better opportunities for self-diagnosing and predictive system to avoid and manage failures.
There can be no question that the air-supported belt life increase would lessen the need for belt-replacement and long term belt changes and thus down-time, would be significantly reduced.
The downside of these high-volume, heavy material applications, are that the air blower power requirement increases such that indeed the overall power requirement saving over conventional roller-supported conveying is not as large as for example for bagasse in the sugar industry. This is largely overcome by using the higher belt speeds that are possibly with air-supported conveyors, but obviously one needs to assess the detailed requirements to see what is possible (e g is a longer trajectory at the off-load point acceptable?
There is an opportunity for self-diagnosis enabling a preventative maintenance system that would along the long length be of crucial importance.
Note that in our design, the Aeroconveyor is self-supportive over large spans, and would generally be far quicker to install and commission than a conventional conveyor, but yes, one would have to study the capital costs (but also the operational and lifetime costs!).
The long length dictates careful study of startup and loaded re-start issues.
Fact is that Aeroconveyors (the original) successfully carries coal and ore in many applications.
Regards ■
Results Of Feasibility Study?
Hello.
I finished my thesis about air-supported belt
conveyors. It was an independent research and I
am able to share the results.
If anyone knows about the results for this
feasibility study, or how it is developing I
would appreciate to know also.
Thanks
Nuno
nunoalbertorocha@yahoo.com ■
Re: "Flow Dynamic Conveyor"
Dear Mr. Rocha,
CDI has also developed an air-slide CFD model and field tested it efficacy.
I am interested in your results you kind offer to share.
I have downloaded the table of contents and find it comprehensive.
If you have a collaborative interest please send the details to:
email: nordell@conveyor-dynamics.com
website: conveyor-dynamics.com
phone: 360-671-2200
fax: 360-671-8450
Lawrence Nordell ■
Re: "Flow Dynamic Conveyor"
Hi Rocha,
I am interested in your result.
I have interest on this topic too. I made research on fluid dynamics aspect for air-supported conveyor some years ago. During that research and development I made many designs for power station, cement works and chemical works to transport different materials. The "design" that I mean here is aerodynamic design (not as draftsman) to ensure the belt work in good and efficiency condition. I also design the fan for specific belt conveyor in order to obtain high efficiency and low noise from the fan.
During the installation, commissioning and later visit, I asked the people what they felt for using this kind of conveyor. It seemed that the owner, operator and maintenance guys are all in happy with this kind of conveyor. But it is not a very good news for manufacture itself for its revenue from selling rollers in future as consumtion parts...
It will be nice to share experience with you.
My email: ahlo@bluewin.ch ■
Tight Curves
Hello.
It has been a pleasure sharing results and papers about air-supported conveyors. Safety, power consumption and maintenance are good competitive topics, and acquisition costs are no longer a concern. Inability to perform tight curves, by the other side, seems to be a big issue. I am interested in knowing more about this.
Kind Regards
Nuno
nunoalbertorocha@yahoo.com ■
Tight Curve
Could you please explain a little what the term "tight curve" means.
Regards ■
Re: "Flow Dynamic Conveyor"
Hello.
I mean horizontal curves with relatively small radi, say around 500 m. ■
Tight Curve
A normal air supported conveyor has very small stability in lateral direction (let us call the stability in vertical plan as longitudinal stability, and horizontal one as lateral stability)since alomst these is no or very small capability in supporting the load from lateral direction.
The stability problem may induced from following factors:
1, the centrifugal force acting on the bulk material and belt must be supported in some way.
2, the deformation elastic force and deformation behavior of the belt may lead to pressure leaking
3, the air pressure distribution affect on the stability aspect.
I think it could be a very complicated topic if we want to make a clear solution.
For roller belt conveyor, it has more stability in this, since the function of its friction and support force from roller group's troughing angle and vertical plan and horizontal plan.
But for air supported conveyor, it lack of such kind of support to against these forces mentioned above.
Some possible solution:
-to make some vertical idle rollers at the side of the belt in the region of curve to stop its shifting out of the working surface area.
-carefully design the bank angle of your air chamber. (not placed in horizontal way, but with a angle, which is related to your speed of belt)
-Re-distribute of air nozzle in the curve area
-coordinate the relationship among them for find a proper matching.
I hope I get the point you ask and also hope it will help
Regards ■
Air Supported Conveyor
Check out the Hendrik Group in CT and NJ USA
Henk Hartsuiker 203-263-7025
www.hendrikent.com ■
Re: "Flow Dynamic Conveyor"
Hello
Quite elucidative. Thank you ahlo.
Regards
Nuno ■
Air Conveyor Idea
If I were you I would seriously look at the capsule pipeline system
offered by WWW.pneutrans.net operating costs are 2 cents-US
per ton mile. ■
12km Convenyor
Brian
I am interested why you are singling out this partular form of transportation of coal from port to power station. I am a specialist in long distance conveying and would be interested in hearing further details of this application to suggest several alternative bulk transportation systems.
The annual throughput and operating parameters would be a start along with some details of the proposed conveyor route.
Please feel free to email me.
Best regards
Graham Leason
Tech-A Ltd ■
Re: "Flow Dynamic Conveyor"
Hello.
I was told that the idea of conveying coal along 12 km with air-supported belt was abandoned. Unfortunately I do not know further details.
Regards
Nuno ■
Coal Conveyors
you shouls seriously consider using the system developed by Pneutrans limited for conyeing you coal.
please check out their web site at pneutrans.net ■
Re: "Flow Dynamic Conveyor"
Originally Posted by Rocha
I finished my thesis about air-supported belt
conveyors. It was an independent research and I
am able to share the results.
If anyone knows about the results for this
feasibility study, or how it is developing I
would appreciate to know also.
Thanks
Nuno
nunoalbertorocha@yahoo.com
Dear Nuno,
Please let me know @ the results for air supported belt conveyors feasibility study. Your help & support will be highly appreciated.
please send me on rajesh29rathod@gmail.com ■
Software To Simulate Air Supported Belt Conveyors
Originally Posted by rajesh29rathodPlease let me know @ the results for air supported belt conveyors feasibility study. Your help & support will be highly appreciated.
please send me on rajesh29rathod@gmail.com
Greetings,
Since the thesis on air supported belt conveyors, back then with a more theoretical perspective, more advancements have been made. Currently a Finite Element model for the air supply is being released, with a practical perspective, considering belt deflections and realistic air film thickness, pressure losses in plenum, ducts and components, as well as fans curves. This allows to check if the air supply system works reliably, which is critical for ASBC.
Check this link: desk.asbc-eng.com
Best Regards
Nuno Rocha ■
"Flow Dynamic Conveyor"
"Flow Dynamic Conveyor" for Power Plant Coal
Our client Taiwan Power Company / TPC is planning to build more than 10 km of "Flow Dynamic Conveyor", but thru your network service, I failed to find out suitable experienced equipment manufacturers.
Thus can you do me a favor for requesting well experienced makers, if any, to contact me soon.
Your help and support will be highly appreciated.
Best regards,
Brian Wu
Director
Formosa Industrial Services Corp.
Tel +886-2-2581-0916~7
Fax +886-2-2581-0918
Email: jkw168@ms28.hinet.net
PS:
My understanding is as follows:
1. The "Flow Dynamic Conveyor/FDC" has been developed by a Japanese
maker called Kawasaki Heavy Industries Co., Ltd. / KHI, which is
designed for transporting bulk materials like as Ore, Coal..
2. Furthermore, in Japan there are only two developers, besides KHI
the other one is Ishikawajima-Harima Heavy Industries Co.,LTD. / IHI.
3. Besides the above two Japanese makers, no European or American
maker is known in Taiwan.
4. Now TPC is under feasability study for constructing a FDC for conveying
Coal to a new coal fired plant which now is also under F/S stage.
5. The distance will be about 12 km from seaport to power station site.
6. Quantity of coal to be conveyed is not fixed yet, but it shall meet
requirements to supply 2 units of 800 MW super critical boiler power plant.
7. According to KHI's information, they utilize "floating air" to transport
coal with high speed, but the capacity is not so high, compared with the
traditional belt conveyor. ■