Re: Bed Ash Conveying System
Bed ash can vary greatly in particle characteristics such as size, shape, density and temperature depending on the fuel being burned and the type of boiler process.
There is certainly not one rule which can be applied to all bed ash materials.
If you can give more detailed specifics, we'd be happy to offer you some assistance in the proper design and system / hardware selection.
Regards ■
Re: Bed Ash Conveying System
Bed ash is generally very granular, with a wide size distribution, and so it can only be conveyed in dilute phase suspension flow in a conventional conveying system. It can be highly abrasive, depending on the raw material, and so the pipeline and bends will have to be designed and specified for this.
As Jack says, the conveying characteristics of bed ash will vary with the grade and source of the material. I have pneumatic conveying data on bed ash in my various books but it can provide no more than a guide for you. ■
Pneumatic Conveying System
We take this opportunity to brief ourselves as a member company of BSBK Group, undertaking turnkey contract for complete Ash Handling System/ Coal Mill Rejects Handling System in India since 1984. We, a joint venture Company with M/s. Clyde Bergemann Materials Handling Limited (CBMHL), U.K., the world leader in Pneumatic Conveying System, have supplied and commissioned Ash handling plants in India & abroad at various locations, which are working satisfactorily. We offer various proven types of Ash handling systems including Wet type Bottom Ash Handling System, Vacuum type Ash Handling Extraction System, Dense Phase Pneumatic Pressure type Fly Ash Conveying Systems (Extraction & Transportation) as well as Ash Slurry Disposal Systems. Civil, Structural & Piping work has also been done by us as a part of Ash Handling System.
Our main area of specialisation is in the field of Ash Handling System & Coal Mill Rejects Handling System. We have executed several projects, which are in successful operation to the entire satisfaction of our clients for many years. Some of our valued clients include C.E.S.C., TISCO, TEC, P.S.E.B., GHCL, L&T, B.H.E.L., A.C.C., Grasim Industries, N.T.P.C., INDAL, HINDALCO, Sterlite Industries Limited, BALCO, M.S.E.B., AECO, Mitsui Babcock (U.K.) & ABB - Alstom (U.K.) etc.
We have to our credit worlds longest Pneumatic Dry Fly Ash Conveying System for Hindalco Industries Ltd., Renusagar Power Division Unit # 1, 2, 8, 9 & 10 for transportation of dry fly ash from the plant silos to remote silo @120 TPH per line (total 2 lines) at a distance of 1680 Mtrs., which was commissioned in March’2004. Till then the Dry Fly Ash Conveying System supplied by us for 6x210 MW Unit at GGSSTPP, Ropar–P.S.E.B. was a longest conveying system in the worlds with ash conveying capacity of each stream is 40 TPH at a distance of 1600 mtrs. (There are total four numbers of such streams). The plant was commissioned in August’1996/March’1997 and working satisfactorily.
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With regards,
B.S.Negi
Proposals Deptt.
Macawber Beekay Pvt. Ltd.
New Delhi
Fax: +91-011-42224222
e-mail: Baldev.Negi@mbl.in ■
Bed ash conveying system
I am interested to know the calculations and the different co efficients for pneumatic pressure conveying bed ash handling system. Is there any article or publication? What should be the transport vessel configurations? ■