Re: Cement Pumping Design
Dear Mosa1971,
A PRELIMINARY design could be the following:
A pressure 2-vessel system
Each vessel 20 m3 volume and 15 m3 cement content
Stepped pipeline 10” to 12”
Compressore Aerzen VM45 displacement 0.833 m3/sec at 2.5 bar
best regards
Teus
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Teus
Reply
dear Mr. Teus Tuinenburg
thank you very much for your kind reply
I have some explanations about yor answer as follows:
1.can we use a pipe with diameter of 6" or 4"
2. can i pump the bulk cemet through one stage or we need more than one stage ( plz remember that the distance is 800 m long)
3. pls can i know your refernce for this answer ■
Re: Cement Pumping Design
Dear Mosa1971,
Using a single diameter pipe of 6” (150mm) will result in
a capacity of approx. 30 tons/hr.
The calculations are for a 1 stage installation.
The SLR = 26.1
1059 kg cement is at a certain moment underway with a residence time of approx 110 sec.
With a double vessel system of 8.8 tons of cement in each vessel, the cycle time = 1082 sec.
A 4” system will perform less.
I am not sure what you mean by your 3rd question, but the calculation program is based on my own research, experience and field testing since 1981.
best regards
Teus ■
Teus
Re: Cement Pumping Design
Dear Mr Teus Tuinenburg
thank you again for your reply. It seems you are one of the experts of this field and its kind of you to reply.
the final question is: can you send me a full description of the pipe- line and all needed equipment (auxiliary units) and simlpe drowing of the pipe- line.
my e-mail: zraiya@hotmail.com
best regards
mosa1971 ■
Re: Cement Pumping Design
Dear mosa1971,
For the actual project work, you have to contact an experienced supplier.
Moreover, you still have to figure out how your system will be set up, which also can be done by the supplier.
Anyway, a pneumatic cement conveying system should at least (but not limited to this list) comprise the following:
-Feeder system (single or double vessel, screw feeder, rotary lock) including piping, valves, safety devices etc.
-Compressor, including drive motor, silencers, coolers, safety devices etc.
-Compressed air
-PLC control
-Pipe routing with bends
-Receiving silo or hopper
-Self-cleaning dust filter
-Under- and over pressure valve on silo or hopper
-level testers
-Communication between feeder station and silo or hopper.
I also advise strongly to have your installation designed thoroughly by your supplier before you take the final decision. I have strong doubts that a cement conveying system will be economically feasible for such a small amount of cement over such a long distance.
The longest distance for cement conveying I ever built was a system over 540 m for a rate of approx. 700 tons/hr.
Be smart before you start.
Best regards
Teus ■
Teus
Re: Cement Pumping Design
Dear Teus,
I dont know whether you or your team have experience in conveying sand.
The bulk density is 1.46t/m3
capability: 100t/hr
distance: Hoz. 300m; Ver. 0m; no bend
Can you try to help to calculate this system?
Thanks lots.
My email: xiaoliang-zhang@163.com ■
Cement Pumping Design
Power requirement for pnumatic transport will be high about 300 KW in your case (5 KWH/T). You can do cost benefit analysis of using a pipe conveyor, elevetor combination. You will also save on reduced size of dust collector for silo vent.
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Re: Cement Pumping Design
Dear Leo.
Without knowing the type of sand, it is impossible to judge whether it is possible or feasible to convey this material pneumatically.
Particle size and moisture content are the first issues to address.
A 300 m pipeline will be a pressure system for sure.
If it is a ship unloading, a vacuum system has to be added too.
In addition, the abrasiveness of the sand will pose a technical challenge.
Success
Teus ■
Teus
Re: Cement Pumping Design
Dear Teus,
Thanks for your soonest response firstly!
The size of sand: <2mm
The moisture content less than 10%(5% is acceptable)
Can you try to image the feasibility for pneumatic system?
If possilbe, can you help to estimate the pressure & volume of air source?
Thanks lots. ■
Re: Cement Pumping Design
Dear Leo.
Conveying sand of 2 mm, with a moisture content of over 5% is a NO GO.
Irresolvable pipe choking will be your faith.
5% moisture is enough to stick the sand to bigger agglomerations and the suspension velocity of such an agglomeration is far too high for efficient pneumatic conveying.
Due to the viscous behavior of the wet sand, the product losses in pneumatic conveying will be huge.
Flow problems in kettles will result in no flow.
A normal standard belt conveyor (widely used in sand transport) in combination with a clamshell grab is a better choice.
Take care
Teus ■
Teus
Re: Cement Pumping Design
Dear Teus,
Thanks and understood!
But consider the limit of the situation in the site, the first choice for us is to use pneumatic convey.
Now we try to handle the sand into to drily, if possible, can you try to estimate this system?
& my email: xiaoliang-zhang@163.com
I am looking forward to cooperate with you. ■
Cement Pumping Design
hi all
our problem is to transport the bulk cement for adistance about 800m and up to height about 30 m the following properties of cement may required to the calculations:
cement temperature: 25 C
no. of bends: 6 bends of angle 90
handelling capacity: 60 ton/hr
the output of designing process:
1. diameter of the pipe
2. pump type and its capacity (full details), technical specifications
3. compressors type and pressure needed ■