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Re: Cement Conveying
dear kevinjcg,
What is your suggestion to your client?
best regards
teus ■
Teus
Re: Cement Conveying
i wanna konw the details about cement characteristic, the repose angle,
now,
are some information is given: length is 160m with 50m vertical, 5 bends. and bulk density is 1500kg/m^3, if 75t/h material is need to be conveyed, how about the air flow , SLR, the pipe diameter.
but the client can provide compressor with 23m^3/min, so who can give me some information about conveying cement.
thank you
How about employing a consultant to solve your problem and learning from him ■
Re: Cement Conveying
Dear teus
from the lots of documents in public, 100 solids loading ratio can be achieved for cement, the minimize air velocity is about 10-11m/s for dilute conveying, if client is right, the step pipe can be used, the terminal velocity is about 21m/s for DN150, and SLR is about 45, i think the air velocity is a little high.
by the way, how about the attrition to pipe
i would have your advice about the cement conveying
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Re: Cement Conveying
Dear kevinjcg,
The design you are now presenting is based on the client’s compressor of 23 m3/min and a 6”pipeline.
You indicate a 2 step pipeline without mentioning the diameter of the first section.
As the endvelocity is too high, I doubt that the begin diameter needs to be even smaller.
Therefore, I assume that the pipeline is 6” all the way.
In that case, the begin velocity will be 7.12 m/sec and the endvelocity will be 25.21 m/sec at a conveying pressure of 2.5 bar.
The SLR is then 36, resulting in 68 tons/hr.
Depending on the feeder system, the system capacity will be lower.
A two-kettle system with kettles of 7m3 volume and 5m3 cement content will have a system capacity of approx 58 tons/hr.
Back to the drawing board?
success
teus ■
Teus
Re: Cement Conveying
teus
thank you for you reply
but would you tell me what kind of discharge valve and valve for inlet can be suitable,
i think the slide valve can be used, but dust emmision may be out , would you give me some advice?
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Re: Cement Conveying
Dear kevinjcg,
I always used rubber seated, pneumatically actuated, butterfly valves in cement conveying.
BR
Teus ■
Teus
Re: Cement Conveying
teus
thank you,
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Cement Conveying
hello,
i wanna konw the details about cement characteristic, the repose angle,
now,
are some information is given: length is 160m with 50m vertical, 5 bends. and bulk density is 1500kg/m^3, if 75t/h material is need to be conveyed, how about the air flow , SLR, the pipe diameter.
but the client can provide compressor with 23m^3/min, so who can give me some information about conveying cement.
thank you
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