Gentleman,

Gentleman.

We have 30 years of exposure for designing Very copmact systems for various materials like-Cement,Fly Ash,Grain,Clinker,Coal ect. At this moment we are designing MATERIAL HANDLING SYSYTEM FOR WORLD'S BIGGEST COAL UNLOADING TERMINAL FROM A SINGLE JETTY WITH A DUTCH CONSULTANT.We have good exposure in FLATand DOME storages and extraction sysytems for various materials.

Regarding Cement and clinker we have three referances in GULF and these are-

1.60000 T storage and 5 mtpa despatch terminal In KUWAIT

2.5 Mtpa cement cement unloading from ships,bulk tankers,storage,extraction and despatched by bulkers and big bags in BAHRAIN

3. Similar type of sysytem for clincker with dome storage.

In india we have done more them 35 of such systems.

LIBRAN SETH

0091-0-9811055650 ■

contact <www.pnuetrans.net>

the capsule pipeline trains are unaffected by humidity and the train units can be sealed to keep out moisture as they traverse from point A to B using rotary lobe blowers to move the trains from point to point eliminating any need for pushing product through a pipeline in dilute or dense phase.

The minimum amount of product moved is 100000 tons per year and the minimum rcommended distance for transfer is one mile- 5280 feet.

Your project would definetely work with a capsule pipeline.

The capsule pipeline system is fully automated for loading and unloading and will run 24 hours a day unattended year round with little labor required.

It is unaffected by weather or labor shortages and is self cleaning. ■

Dear Vijay, I am trying your telephone number and it is not responding,Since I am visiting SAUDI,EGYPT AND BAHRAIN I can drop In Dubai for the initial discussions and to visit site.

As mentioned in our last mails that we are very much familier with the conception of NEW CEMENT TERMINALS IN GULF STATES.

I can visit you on MAY 6 TH ,in that case you will have to arrange for visa and hotel stay,I sall be paying for my ticktes.Please provide me your mail ID and contact no.enabling me to send you list and contact details of our happy customers in GULF.

Regards, ANIL

0091-0-9811055650 ■

Dear Mr kvcando13,

I do not know whether a pneumatic cement conveying installation over 5000 m has been built before.

I had my computer program to calculate a preliminary pneumatic conveying design for 200 tons/hr. (You did not mention the capacity)

The preliminary calculation results are :

Product : Cement

Capacity : 200 tons/hr

Pressure : 2.5 bar(o)

Compressor volume : 250 m3/min

Filter area receiving end : 500 m2

Pipeline diameter begin : 553 mm (22”)

Pipeline diameter end : 653 mm (24”)

Loading ratio : 11.6 kg/kg

Residence time of cement in pipeline : 570 seconds

Energy consumption : 4.15 kWh/ton

Power requirement : 885 kW

Pipeline content : 34.6 ton (In pipeline underway)

The feeding of this pipeline has to be done by screwpump(s), in order to avoid long purge times between kettles.

Consider this calculation only indicative.

For a real project, real calculations are necessary as well as detail design.

Success. ■

There are very few referances for such a long conveying,it has got plus and minus points ,but has got more minus points then plus points.

While designing a system we should look deep in various factors like--

1. Less Power consumption

2. Less wear and tear of conveying pipes.

3.long life of the equipment with less maintainence.

Suppose we should look in to the option of providing pipe conveyor,if there is a suitable route , in that case--

1. We can export cement from the factory up to the storage silos near the port with pipe conveyor.

2. same way we can import the material like clinker,fly ash,gypsum and slag ect. from jetty to the factory through the return pipe conveyor.

3.For storage purpose we can think of DOME SILOS instead of conventional cylindrical silos.By doing like this we can save lot of money and time.

LIBRAN SETH ■

kvcando13

Gentleman, We are trying your telephone number which is provided by your goodself,it seems that this number is not valid,kindly provide me your valid phone numbers.

Libran-Seth ■

We have experience with a cement transfer system over 1,500m in length successfully operating For 5,000m, as others have mentioned, the Kw/Ton for a single pneumatic transfer system would be extremenly high, not to mention the other problems associated with a single transfer line.

For such a long system, the need to use pneumatic transfer has to be significant to overtake the use of a mechanical system and then, multiple systems conveying between transfer stations would be a more prudent approach to consider.

Regards ■

Humidity levels along the Persian Gulf coast reduce the plus points of pneumatic conveying to nil, unless you are prepared to trace heat the line during night downtime. Power requirements around the order of 1MW will be very hard to satisfy in that region & a discrete generator package would probably be called for.

Tub loading & unloading bottlenecks could be reduced by duplicating the existing facilities. You could certainly double your existing haulage system for less than the outlay on a power plant & that is before you throw up the rest of the stuff.

A pipe conveyor would be your best other alternative, contact Kochtransporttechnik who know what they are doing in such matters. ■

Dear johngateley, Thanks for your valuable comments.Pipe conveyor sysytem is not new to Indians,We were the part of commissioning 3.2 km long PIPE CONVEYOR SYSYTEM IN INDIA.

libran seth ■

Pneumatic conveying of cement over 5 kilometer is not a problem. Depending upon the conveying rate and the compressor rating you may need a stepped pipe line. You could run the calculations yourself using my article "Theory and Design of Pneumatic Conveying Systems" or contact me if you need some minimum support in these calculations. I will be glad to help you.

Regards,

Amrit T. Agarwal

Consulting Engineer

Pneumatic Conveying Consulting

Email: polypcc@aol.com

Ph and Fax: 304 346 5125 ■

Dear Mr kvcando13,

I would not worry too much about the relative humidity (RH) of the convey air.

I made the water condensation calculation for the preliminary design in this thread, of which the output is given below.

PRESSURESYSTEM

p-intake (absolute)<1> = 1 bar

temperature intake ... = 35 Degr.C.

relative humidity .... = 100 %

Water vapor pressure ...................... = 0.05549

Dry air pressure ........................... = 0.94451

Dry air density ............................ = 1.0825

Dry air specific volume .................... = 0.92381

Water-mass per 1kg of dry air .............. = 0.03654

Total mass of 1 kg of dry air + water ...... = 1.03654

Intake density ............................. = 1.1220

The conditions right after the compressor in the mixing zone with the cement is taken as :

p-local (absolute) ... ... = 3

Temperature local .Degr.C. = 50

Relative humidity local .................... = 100

Water vapor pressure local ................ = 0.12174

Dry air pressure local...................... = 2.87826

Dry air density local ...................... = 3.1455

Dry air specific volume .................... = 0.31791

Water-mass per 1kg of dry air .............. = 0.02631

Total mass of 1 kg of dry air + water ...... = 1.02631

Local density .............................. = 3.2282

Condensation per 1kg of dry air ............ = 0.0102327

intake volume of compressor at intake conditions ........m^3.............. = 15000

cement capacity ........kg............... = 250000

intake mass of compressor ...kg............ = 16830.46

mass of dry air in kg ..................... = 16237.15

mass of water-vapor in kg at intake cond.. = 593.31

mass of water-vapor in kg at local cond... = 427.16

Condensated mass of water in kg = 166.15

Bonded mass of cement .......... = 701.2

Bonded mass of cement in % ..... = 0.28046

Who would notice 0.28 % of bonded cement or 701.2 kgs at 250000 kgs

best regards ■