Re: Dense Phase Pneumatic Conveying System Caculation
Dear Jerry
If you give more of the specific information about the problem you are trying to solve, there are several contributors to this forum who will gladly offer to give you their experience, sizing guidelines and Excel calculation methods, and even provide you with their specific recommendations.
They will need to know the material you want to handle, it's physical characterisitcs, the capacity of the system, the distance you want to convey, both vertical as well as horizontal, the number of bends in the system, the elevation of the location where the system will be installed, etc.
Regards ■
Re: Dense Phase Pneumatic Conveying System Caculation
OK.
The spec. of the conveying system.
the density is. 5t/m3
the size is 20% < .5mm, 80%<=1mm
The capacity 60t/h
horzontal lengh 160m
vertical lengh 30m
approximately: elbow90/ 5pcs. elbow45/ 4 pcs.
I would be very appreciate if someone can give me some instruction on that issue. ■
Re: Dense Phase Pneumatic Conveying System Caculation
Dear Jerry
The density you give, is that bulk density or material density ?
I assumed that it is bulk density.
The material density must then be around 8000 kg/m3 or even heavier
What kind of material is that ? Steel perhaps ?
Based on 8000 kg/m3 and a particle size of 0,8 mm average, the floating velocity should be around 11 m/sec
The air velocity in the pipelines should then be around 50 m/sec at atmospheric conditions.
This resulted in the following calculation
This calculation is far from accurate, but it shows in what direction the installation would look like.
FORUM zz d 11-20-2005
Pressure discharge ????????
Convey length = 190 m
Nu of bends= 9
Pump vol = 2.5 + 2.5 m^3/s
q-convey = 2.50 m^3/s
Dia begin = 193 mm
Dia end = 243 mm
Kettle volume = 50.0 m^3
Cement vol.= 40.0 m^3
C-Vessel = 500 tons/hr
Kettle Cement content = 200.0 tons
Pipevolume = 6.24 m^3
Pipeline Syst. /Nr of Req.kettle
Press. Cap. mu Cap. /kettles fact. v-begin v-end kWh/ton res.time
2.000 - 84 - 7 - 83 / 0.4 - 252 - 29.3 - 52.7 - 5.28 - 8.88
1.750 - 67 - 6 - 67 / 0.3 - 185 - 32.0 - 52.6 - 5.87 - 8.48
1.500 - 50 - 5 - 50 / 0.2 - 126 - 35.2 - 52.6 - 6.89 - 8.11
1.250 - 33 - 3 - 33 / 0.1 - 74 - 39.1 - 52.6 - 9.13 - 7.79
1.000 - 13 - 1 - 13 / 0.0 - 26 - 44.0 - 52.5 - 19.56 - 7.57
Maximum system capacity : 83 t/hr at 2 bar(o)
First of all, it seems technically feasible to convey this material.
(Floating velocity is comparable to that of soybeans or grains)
The loading ratio which can be applied is around 7, which is very low.
Therefore the energy consumption per ton is very high.
As I assumed a certain product loss resistance factor, this calculation is (again) far from accurate.
If f.i. this is a very friable product, this resistance factor could be much higher,
because a lot on energy would then be spent on breaking the particles. (inelastic collisions)
Also the abrasiveness of the product is unknown, with the same influence on product resistance factor.
Mentioning your product would make it perhaps easier to determine whether it is possible to convey your material, because then there might emerge practical experience from the forum members.
best regards ■
Teus
Re: Dense Phase Pneumatic Conveying System Caculation
dear teus
thanks a lot!
it is very helpful.
best regard,
Jerry ■
Thanks
Dear Mr. Amrit
your kind support for upcoming engineers is really an awarding one.
Many many thanks for giving basic theory and some calculations on dilute phase pneumatic conveying.
I will be obliged if you can send me theory and calc of dense phase pneumatic conveying systems.
It is ur great effort that young engineers get an access to thie field and learn basics of pneumatic conveying systems.
Thanks & Regards
RITESH SAXENA ■
Why Pneumatic Conveying
This material at a density of 5 t/m3 (bulk or solid, it really makes no difference) is not a good candidate for pneumatic conveyance in any conveying mode. The energy requirements alone would rule it out as a viable solution.
An economic comparison of pneumatic and mechanical systems, taking both installed costs and operating costs into account, should be made. The outcome would very likely favor mechanical methods. Experience says that tube conveyors would look attractive.
Do your homework and let the numbers do the talking.
Dennis Hauch, PE ■
Dense Phase Calcs
Hi sirs,
I've just recently learn something about lean phase conveying and would like to know more about dense phase one.
is there someone that can provide some equations for me to do design calculations for dense phase conveying? ■
Request Of Exe Or Excel Program For Dilute Vacuum Conveying Mat…
Hi Dear Teus Tuinenburg,
My Name is majid.abdi and happy for meet you in weblog.I have 26 years old.
My work is design of vacuum cleaner machines.
I need a software (application file orexcel) for calculate of an example of dilute vacuum conveying material.
If you help me, I can have progress in my job.
My email address is : (majid.m.abdi1987@gmail.com)
Thank you very much. ■
Re: Dense Phase Pneumatic Conveying System Caculation
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I think you are requesting a PDF copy of my article "THEORY AND DESIGN OF DILUTE PHASE PNEUMATIC CONVEYING SYSTEMS". Please confirm your request. I will be glad to send its copy to you.
Amrit Agarwal
Pneumatic Conveying Consulting
Email: polypcc@aol.com ■
Dense phase pneumatic conveying system caculation
Dear sirs
I am just working on the penumatic conveying syterm caculation. I only learn a little bit dilute phase penumatic conveying system.
I request the kindly help on the design work. ■