Re: Design Calculations For Pneumatic Conveying
Dear Pritesh,
There is no simple, reliable equation from which you can find out the pressure drop in your system.
There are a set of equations that can calculate the pressure drop over a short pipe distance dL.
Newton’s laws to calculate accelerations and velocity equations supplement these equations.
The integration of these calculated pressure drops over the total length gives you the total pressure drop.
The pressure drop for product losses requires a product loss factor and formula.
This product loss factor is determined from existing installations or tests.
Suspension velocity and SLR are some of the main parameters in these equations.
The integration method (plus an iteration process) is necessary because of the compressibility of the conveying gas.
The application of a computer facilitates the possibility of executing the high number of calculations to get to this result. (Visual Basic is a great tool to achieve this)
In addition, there are extra pressure drops involved, s.a. filters.
The parameters you supplied in your initial thread are not sufficient to perform a calculation.
At least the following values are needed:
Material
particle size
particle density
bulk density
(suspension velocity)
pipe geometry
capacity
Any other important information s.a. temperatures, altitude, etc.
Success
Teus ■
Teus
Re: Design Calculations For Pneumatic Conveying
Dear Pritesh,
There is no simple, reliable equation from which you can find out the pressure drop in your system.
There are a set of equations that can calculate the pressure drop over a short pipe distance dL.
Newton’s laws to calculate accelerations and velocity equations supplement these equations.
The integration of these calculated pressure drops over the total length gives you the total pressure drop.
The pressure drop for product losses requires a product loss factor and formula.
This product loss factor is determined from existing installations or tests.
Suspension velocity and SLR are some of the main parameters in these equations.
The integration method (plus an iteration process) is necessary because of the compressibility of the conveying gas.
The application of a computer facilitates the possibility of executing the high number of calculations to get to this result. (Visual Basic is a great tool to achieve this)
In addition, there are extra pressure drops involved, s.a. filters.
The parameters you supplied in your initial thread are not sufficient to perform a calculation.
At least the following values are needed:
Material
particle size
particle density
bulk density
(suspension velocity)
pipe geometry
capacity
Any other important information s.a. temperatures, altitude, etc.
Success
Teus ■
Teus
Re: Design Calculations For Pneumatic Conveying
Thank you Amrit, the article is very interesting and useful.
Regards
Mark Throp ■
Re: Design Calculations For Pneumatic Conveying
Thank you Amrit, the article is very interesting and useful.
Regards
Mark Throp ■
Re: Design Calculations For Pneumatic Conveying
Dear Tathadream,
Concerning the vacuum installation:
Cell B62 = 699 SCFM
Cell B72 = 0.378 bar vacuum # 1-0.378 = 0.622 bar(abs)
Cell B13 = 100 degrC MIX TEMPERATURE @ DESTINATION
Then:
ICFM = SCFM / bar(abs) * (273+temperature)/ 273
ICFM = 699 / 0.622 * (273+100)/ 273= 1535 ICFM
However, in cell C71 a value of 2412 ICFM is calculated.
Calculated from the capacity and the SLR:
Material mass = 62.5 tons/hr
SLR = 12.7
Air Mass = 62500/12.7 = 4921 kg/hr = 4921/60 = 1.367 kg/sec
Intake temperature = 15 degrC = 288 K
Air mass =1.367 = 1.293 * SCFM * p(abs)/1 * 273/(273+temp)
Air mass =1.367 = 1.293 * SCFM * 1/1 * 273/(2788)
SCFM = (1.367 * 288) / (1.293 * 273) / 0.028316 *60 =
1.11533 / 0.028316 * 60 = 2363 SCFM
From the same spreadsheet, it is possible to calculate the ICFM in two different ways and get two different values.
This should not be possible.
Can you explain this?
BR
Teus
PS. I am familiar with the problem of inconsistencies when writing a program. My hair went gray that way. ■
Teus
Re: Design Calculations For Pneumatic Conveying
Dear Tathadream,
Concerning the vacuum installation:
Cell B62 = 699 SCFM
Cell B72 = 0.378 bar vacuum # 1-0.378 = 0.622 bar(abs)
Cell B13 = 100 degrC MIX TEMPERATURE @ DESTINATION
Then:
ICFM = SCFM / bar(abs) * (273+temperature)/ 273
ICFM = 699 / 0.622 * (273+100)/ 273= 1535 ICFM
However, in cell C71 a value of 2412 ICFM is calculated.
Calculated from the capacity and the SLR:
Material mass = 62.5 tons/hr
SLR = 12.7
Air Mass = 62500/12.7 = 4921 kg/hr = 4921/60 = 1.367 kg/sec
Intake temperature = 15 degrC = 288 K
Air mass =1.367 = 1.293 * SCFM * p(abs)/1 * 273/(273+temp)
Air mass =1.367 = 1.293 * SCFM * 1/1 * 273/(2788)
SCFM = (1.367 * 288) / (1.293 * 273) / 0.028316 *60 =
1.11533 / 0.028316 * 60 = 2363 SCFM
From the same spreadsheet, it is possible to calculate the ICFM in two different ways and get two different values.
This should not be possible.
Can you explain this?
BR
Teus
PS. I am familiar with the problem of inconsistencies when writing a program. My hair went gray that way. ■
Teus
Re: Design Calculations For Pneumatic Conveying
Concerning the vacuum installation:
Cell B62 = 699 SCFM
Cell B72 = 0.378 bar vacuum # 1-0.378 = 0.622 bar(abs)
Cell B13 = 100 degrC MIX TEMPERATURE @ DESTINATION
Then:
ICFM = SCFM / bar(abs) * (273+temperature)/ 273
ICFM = 699 / 0.622 * (273+100)/ 273= 1535 ICFM
However, in cell C71 a value of 2412 ICFM is calculated.
Calculated from the capacity and the SLR:
Material mass = 62.5 tons/hr
SLR = 12.7
Air Mass = 62500/12.7 = 4921 kg/hr = 4921/60 = 1.367 kg/sec
Intake temperature = 15 degrC = 288 K
Air mass =1.367 = 1.293 * SCFM * p(abs)/1 * 273/(273+temp)
Air mass =1.367 = 1.293 * SCFM * 1/1 * 273/(2788)
SCFM = (1.367 * 288) / (1.293 * 273) / 0.028316 *60 =
1.11533 / 0.028316 * 60 = 2363 SCFM
From the same spreadsheet, it is possible to calculate the ICFM in two different ways and get two different values.
This should not be possible.
Can you explain this?
BR
Teus
PS. I am familiar with the problem of inconsistencies when writing a program. My hair went gray that way.
Dear Teus,
for calculating the ICFM, I think it,s better to use exit temperature of the air rather than lowest ambient temperature (though we are neglecting the effects of temperature rise in the pipe due to friction), another thing in in your evaluation, you have mixed both fps and SI units, which I think we should not do, but I may be wrong. ■
Re: Design Calculations For Pneumatic Conveying
Concerning the vacuum installation:
Cell B62 = 699 SCFM
Cell B72 = 0.378 bar vacuum # 1-0.378 = 0.622 bar(abs)
Cell B13 = 100 degrC MIX TEMPERATURE @ DESTINATION
Then:
ICFM = SCFM / bar(abs) * (273+temperature)/ 273
ICFM = 699 / 0.622 * (273+100)/ 273= 1535 ICFM
However, in cell C71 a value of 2412 ICFM is calculated.
Calculated from the capacity and the SLR:
Material mass = 62.5 tons/hr
SLR = 12.7
Air Mass = 62500/12.7 = 4921 kg/hr = 4921/60 = 1.367 kg/sec
Intake temperature = 15 degrC = 288 K
Air mass =1.367 = 1.293 * SCFM * p(abs)/1 * 273/(273+temp)
Air mass =1.367 = 1.293 * SCFM * 1/1 * 273/(2788)
SCFM = (1.367 * 288) / (1.293 * 273) / 0.028316 *60 =
1.11533 / 0.028316 * 60 = 2363 SCFM
From the same spreadsheet, it is possible to calculate the ICFM in two different ways and get two different values.
This should not be possible.
Can you explain this?
BR
Teus
PS. I am familiar with the problem of inconsistencies when writing a program. My hair went gray that way.
Dear Teus,
for calculating the ICFM, I think it,s better to use exit temperature of the air rather than lowest ambient temperature (though we are neglecting the effects of temperature rise in the pipe due to friction), another thing in in your evaluation, you have mixed both fps and SI units, which I think we should not do, but I may be wrong. ■
Re: Design Calculations For Pneumatic Conveying
Dear Tathadream,
Using the exit temperature to calculate the intake conditions does not seem to be logical.
Br
Teus ■
Teus
Re: Design Calculations For Pneumatic Conveying
Dear Tathadream,
Using the exit temperature to calculate the intake conditions does not seem to be logical.
Br
Teus ■
Teus
Re: Design Calculations For Pneumatic Conveying
in that it case it is best to consider tmeperature at inlet, which is 150 deg C (it is the mixture temperature. The fly ahs temperature at precipitator bottom is 200 deg C) ■
Re: Design Calculations For Pneumatic Conveying
in that it case it is best to consider tmeperature at inlet, which is 150 deg C (it is the mixture temperature. The fly ahs temperature at precipitator bottom is 200 deg C) ■
Re: Design Calculations For Pneumatic Conveying
Dear Tathadream,
Then the new verifying calculations become:
Concerning the vacuum installation:
Cell B62 = 699 SCFM
Cell B72 = 0.378 bar vacuum # 1-0.378 = 0.622 bar(abs)
Cell B13 = 150 degrC MIX TEMPERATURE @ DESTINATION
Then:
ICFM = SCFM / bar(abs) * (273+temperature)/ 273
ICFM = 699 / 0.622 * (273+200)/ 273= 1947 ICFM
However, in cell C71 a value of 2412 ICFM is calculated.
Calculated from the capacity and the SLR:
Material mass = 62.5 tons/hr
SLR = 12.7
Air Mass = 62500/12.7 = 4921 kg/hr = 4921/60 = 1.367 kg/sec
Air conditions for SCFM are 1 bar(a) and 273 degrC.
Air mass =1.367 = 1.293 * SCFM * 0.028316 /60
SCFM = 1.367/1.293 / 0.028316 *60 = 2240 SCFM
However, he calculated SCFM is given as 699 SCFM (cell B62)
Calculation of vacuum pump displacement
Exit temperature = 200 degrC = 473 K
Air mass =1.367 = 1.293 * (1-vacuum)/1 * 273/(273+temp) * ICFM
Air mass =1.367 = 1.293 * (1-0.378)/1 * 273/(473) * ICFM
ICFM = (1.367 * 473) / (1.293 * 273) / 0.622 / 0.028316 * 60 =
1.83176 / 0.028316/0.622 * 60 = 6239 ICFM = Vacuum pump displacement.
I still find the figures confusing.
Have a nice day
Teus ■
Teus
Re: Design Calculations For Pneumatic Conveying
Dear Tathadream,
Then the new verifying calculations become:
Concerning the vacuum installation:
Cell B62 = 699 SCFM
Cell B72 = 0.378 bar vacuum # 1-0.378 = 0.622 bar(abs)
Cell B13 = 150 degrC MIX TEMPERATURE @ DESTINATION
Then:
ICFM = SCFM / bar(abs) * (273+temperature)/ 273
ICFM = 699 / 0.622 * (273+200)/ 273= 1947 ICFM
However, in cell C71 a value of 2412 ICFM is calculated.
Calculated from the capacity and the SLR:
Material mass = 62.5 tons/hr
SLR = 12.7
Air Mass = 62500/12.7 = 4921 kg/hr = 4921/60 = 1.367 kg/sec
Air conditions for SCFM are 1 bar(a) and 273 degrC.
Air mass =1.367 = 1.293 * SCFM * 0.028316 /60
SCFM = 1.367/1.293 / 0.028316 *60 = 2240 SCFM
However, he calculated SCFM is given as 699 SCFM (cell B62)
Calculation of vacuum pump displacement
Exit temperature = 200 degrC = 473 K
Air mass =1.367 = 1.293 * (1-vacuum)/1 * 273/(273+temp) * ICFM
Air mass =1.367 = 1.293 * (1-0.378)/1 * 273/(473) * ICFM
ICFM = (1.367 * 473) / (1.293 * 273) / 0.622 / 0.028316 * 60 =
1.83176 / 0.028316/0.622 * 60 = 6239 ICFM = Vacuum pump displacement.
I still find the figures confusing.
Have a nice day
Teus ■
Teus
Many Thanks To Mr. Agarwal
Dear Sir:
Thanks for e-mailing me the valuable article.
Best Wishes,
Y.C. Wang ■
Many Thanks To Mr. Agarwal
Dear Sir:
Thanks for e-mailing me the valuable article.
Best Wishes,
Y.C. Wang ■
My Comments On Your Article
dear dr Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Thank you for sending your article in design of dilute phase pneumatic conveying
I read it and prepared the excel file
it help me in my conveying project
Best regards
ali rashidi ■
My Comments On Your Article
dear dr Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Thank you for sending your article in design of dilute phase pneumatic conveying
I read it and prepared the excel file
it help me in my conveying project
Best regards
ali rashidi ■
Re: Design Calculations For Pneumatic Conveying
Regards,
Amrit T. Agarwal
Consulting Engineer
Pneumatic Conveying Consulting Services
Email: polypcc@aol.com
Ph and Fax: 304 346 5125
Der Mr. Agarwal
I have been trying to find your article about system design calculations for pneumatic conveying published in the 04/2005 issue of Powder Handling and Processing magazine, but sadly without success.
Would you please be so kind as to send me a copy of that article?
Tkhanking in advance for your consideration, kind regards
Alexander Eberl ■
Re: Design Calculations For Pneumatic Conveying
Regards,
Amrit T. Agarwal
Consulting Engineer
Pneumatic Conveying Consulting Services
Email: polypcc@aol.com
Ph and Fax: 304 346 5125
Der Mr. Agarwal
I have been trying to find your article about system design calculations for pneumatic conveying published in the 04/2005 issue of Powder Handling and Processing magazine, but sadly without success.
Would you please be so kind as to send me a copy of that article?
Tkhanking in advance for your consideration, kind regards
Alexander Eberl ■
Design Calculation For Pneumatic Conveying
Dear Amit,
Kindly send me a copy at huzwas@yahoo.com ■
Design Calculation For Pneumatic Conveying
Dear Amit,
Kindly send me a copy at huzwas@yahoo.com ■
Can I Have A Copy Of It.
Sir, as I am working on making machinery specs. the said article could be helpful for me. so, please send me the copy.
atulkumarhingnekar@gmail.com ■
Can I Have A Copy Of It.
Sir, as I am working on making machinery specs. the said article could be helpful for me. so, please send me the copy.
atulkumarhingnekar@gmail.com ■
Friction Multiplier
Respected Mr. Agarwal,
I have gone trough ypur article, Its realy shows the guideline to design a pneumatic conveying system.
Well, I have a question, You have mention the friction multiplier differs from material to material, and it ranges from 0.4 to 4.0, Can you please what should be the Friction multipler for a Material like "Fly Ash and Cement".
I am eagerly waiting for your reply sir.
Regards,
R.K.Khuntia ■
Friction Multiplier
Respected Mr. Agarwal,
I have gone trough ypur article, Its realy shows the guideline to design a pneumatic conveying system.
Well, I have a question, You have mention the friction multiplier differs from material to material, and it ranges from 0.4 to 4.0, Can you please what should be the Friction multipler for a Material like "Fly Ash and Cement".
I am eagerly waiting for your reply sir.
Regards,
R.K.Khuntia ■
Re: Design Calculations For Pneumatic Conveying
can you send me the copy of the same at atulkumarhingnekar@gmail.com.
Regards,
Amrit T. Agarwal
Consulting Engineer
Pneumatic Conveying Consulting Services
Email: polypcc@aol.com
Ph and Fax: 304 346 5125
■
Re: Design Calculations For Pneumatic Conveying
can you send me the copy of the same at atulkumarhingnekar@gmail.com.
Regards,
Amrit T. Agarwal
Consulting Engineer
Pneumatic Conveying Consulting Services
Email: polypcc@aol.com
Ph and Fax: 304 346 5125
■
Re: Design Calculations For Pneumatic Conveying
Respected Mr. Agarwal,
I have gone trough ypur article, Its realy shows the guideline to design a pneumatic conveying system.
Well, I have a question, You have mention the friction multiplier differs from material to material, and it ranges from 0.4 to 4.0, Can you please what should be the Friction multipler for a Material like "Fly Ash and Cement".
I am eagerly waiting for your reply sir.
Regards,
R.K.Khuntia
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Dear Mr. Khuntia,
For cement, if you use my calculation method, the Friction Factor for cement is 0.8 to 1.2, depending upon solids to air ratio. Higher the solids/air ratio, higher is this number,
For flyash, since the Friction Factor is particle size and density dependent, it is difficult to give you a number without this information.
Regards,
Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Email: polypcc@aol.com
Ph and Fax: 304 346 5125
. ■
Re: Design Calculations For Pneumatic Conveying
Respected Mr. Agarwal,
I have gone trough ypur article, Its realy shows the guideline to design a pneumatic conveying system.
Well, I have a question, You have mention the friction multiplier differs from material to material, and it ranges from 0.4 to 4.0, Can you please what should be the Friction multipler for a Material like "Fly Ash and Cement".
I am eagerly waiting for your reply sir.
Regards,
R.K.Khuntia
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Dear Mr. Khuntia,
For cement, if you use my calculation method, the Friction Factor for cement is 0.8 to 1.2, depending upon solids to air ratio. Higher the solids/air ratio, higher is this number,
For flyash, since the Friction Factor is particle size and density dependent, it is difficult to give you a number without this information.
Regards,
Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Email: polypcc@aol.com
Ph and Fax: 304 346 5125
. ■
Re: Design Calculations For Pneumatic Conveying
Dear Mr. Amrit
Please send a copy of "Theory and Design of Pneumatic Conveying Systems".
I am designing a Ash handling system, I am not able to design the total air requirement and compressor selection. Can you please inlight something, so that I can select a suitable compressor.
Regards
Santosh ■
Re: Design Calculations For Pneumatic Conveying
Dear Mr. Amrit
Please send a copy of "Theory and Design of Pneumatic Conveying Systems".
I am designing a Ash handling system, I am not able to design the total air requirement and compressor selection. Can you please inlight something, so that I can select a suitable compressor.
Regards
Santosh ■
Pneumatic Conveying Systems
Dear Amrit
I'm a Student at Lund Institute of Technology in Sweden.
Right now I'm doing my diploma work were the task is to
computer simulate the flow of pellets/granules trough a short radius bend
in a pneumatic conveying system.
When I'm going to simulate the flow in a bend, I'm not
sure what granule parameters has the biggest affect on the flow. Because
It’s a short radius bend it will most likely bounce a lot in the walls.
For example, the Hardness, coefficient of restitution, elasticity, density, friction (granule/wall) (granule/granule)
It would be interesting to read your article and maybe it can help me find my answers?
May I also request a copy of your article? And excel file?
Regards Palmberg
cim04jp9@student.lth.se ■
Pneumatic Conveying Systems
Dear Amrit
I'm a Student at Lund Institute of Technology in Sweden.
Right now I'm doing my diploma work were the task is to
computer simulate the flow of pellets/granules trough a short radius bend
in a pneumatic conveying system.
When I'm going to simulate the flow in a bend, I'm not
sure what granule parameters has the biggest affect on the flow. Because
It’s a short radius bend it will most likely bounce a lot in the walls.
For example, the Hardness, coefficient of restitution, elasticity, density, friction (granule/wall) (granule/granule)
It would be interesting to read your article and maybe it can help me find my answers?
May I also request a copy of your article? And excel file?
Regards Palmberg
cim04jp9@student.lth.se ■
Pneumatic Conveying Article
Dear Mr. Amrit
Please send a copy of "Theory and Design of Pneumatic Conveying Systems".
I am designing a Ash handling system, I am not able to design the total air requirement and compressor selection. Can you please inlight something, so that I can select a suitable compressor.
Regards
Santosh
++++++++++++++++++++++++++++++++++++++++++++++++++++++
Dear Santosh,
Please send your request for this article to my email address given below. For air requirements, just follow the method given by me in the article.
Thanks,
Amrit
Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Email: polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Pneumatic Conveying Article
Dear Mr. Amrit
Please send a copy of "Theory and Design of Pneumatic Conveying Systems".
I am designing a Ash handling system, I am not able to design the total air requirement and compressor selection. Can you please inlight something, so that I can select a suitable compressor.
Regards
Santosh
++++++++++++++++++++++++++++++++++++++++++++++++++++++
Dear Santosh,
Please send your request for this article to my email address given below. For air requirements, just follow the method given by me in the article.
Thanks,
Amrit
Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Email: polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Re: Design Calculations For Pneumatic Conveying
Dear Amrit
I'm a Student at Lund Institute of Technology in Sweden.
Right now I'm doing my diploma work were the task is to
computer simulate the flow of pellets/granules trough a short radius bend
in a pneumatic conveying system.
When I'm going to simulate the flow in a bend, I'm not
sure what granule parameters has the biggest affect on the flow. Because
It’s a short radius bend it will most likely bounce a lot in the walls.
For example, the Hardness, coefficient of restitution, elasticity, density, friction (granule/wall) (granule/granule)
It would be interesting to read your article and maybe it can help me find my answers?
May I also request a copy of your article? And excel file?
Regards Palmberg
cim04jp9@student.lth.se
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Dear Palmberg,
Lot of research work has been done on bends. It will be helpful to you if you read these technical papers. Some of these are given below:
1. Effect of Particle Concentration on Pipe Bends, by Mills and Mason.
2. A Full Scale Pneumatic Conveying Test Rig: Description and Bend Effects.
3. Pressure Losses by Bends in Pneumatic Conveying Lines: Effect of Bend Geometry and Fittings, by MSA Bradley.
4. Flow through Bends and Acceleration Zones in Pneumatic Conveying Systems, by Marcus, Hilbert, and Klinzing.
5. The Influence of Bend Geometry on Pressure Dropin Pneumatic Conveying Pipelines, by Mills and Mason.
The major effect of a bend is "Decrease in Solids Velocity" from the Inlet to the Outlet of the Bend. We all know that this decrease depends upon particle shape, size, wall friction (between particle and bend wall), density, elasticity, etc.
Your research could be done by changing one variable only and keeping the all others constant.
I have not seen such an exhaustive study, if you come across one, let me know.
Best regards,
Amrit
Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Email: polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Re: Design Calculations For Pneumatic Conveying
Dear Amrit
I'm a Student at Lund Institute of Technology in Sweden.
Right now I'm doing my diploma work were the task is to
computer simulate the flow of pellets/granules trough a short radius bend
in a pneumatic conveying system.
When I'm going to simulate the flow in a bend, I'm not
sure what granule parameters has the biggest affect on the flow. Because
It’s a short radius bend it will most likely bounce a lot in the walls.
For example, the Hardness, coefficient of restitution, elasticity, density, friction (granule/wall) (granule/granule)
It would be interesting to read your article and maybe it can help me find my answers?
May I also request a copy of your article? And excel file?
Regards Palmberg
cim04jp9@student.lth.se
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Dear Palmberg,
Lot of research work has been done on bends. It will be helpful to you if you read these technical papers. Some of these are given below:
1. Effect of Particle Concentration on Pipe Bends, by Mills and Mason.
2. A Full Scale Pneumatic Conveying Test Rig: Description and Bend Effects.
3. Pressure Losses by Bends in Pneumatic Conveying Lines: Effect of Bend Geometry and Fittings, by MSA Bradley.
4. Flow through Bends and Acceleration Zones in Pneumatic Conveying Systems, by Marcus, Hilbert, and Klinzing.
5. The Influence of Bend Geometry on Pressure Dropin Pneumatic Conveying Pipelines, by Mills and Mason.
The major effect of a bend is "Decrease in Solids Velocity" from the Inlet to the Outlet of the Bend. We all know that this decrease depends upon particle shape, size, wall friction (between particle and bend wall), density, elasticity, etc.
Your research could be done by changing one variable only and keeping the all others constant.
I have not seen such an exhaustive study, if you come across one, let me know.
Best regards,
Amrit
Amrit Agarwal
Consulting Engineer
Pneumatic Conveying Consulting
Email: polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Re: Design Calculations For Pneumatic Conveying
Dear Palmberg,
Have a look at:
http://www.powderandbulk.com/videos/...ca75622a642691
Success
Teus ■
Teus
Re: Design Calculations For Pneumatic Conveying
Dear Palmberg,
Have a look at:
http://www.powderandbulk.com/videos/...ca75622a642691
Success
Teus ■
Teus
Re: Design Calculations For Pneumatic Conveying
Dear Amrit
Thank so much for your article sending to me. After I went through it, I think it made me more understand the nature of pneumatic conveying. I have some problem with solid accel. calculation on worksheet 3. I will give you the details by mail.
Yingsak.K ■
Re: Design Calculations For Pneumatic Conveying
Dear Amrit
Thank so much for your article sending to me. After I went through it, I think it made me more understand the nature of pneumatic conveying. I have some problem with solid accel. calculation on worksheet 3. I will give you the details by mail.
Yingsak.K ■
Conveyor Calculation
Dear sir,
I am working as a project manager in oneof the malaysian company.I need the conveyour calculation method.Please send me the pdf to me.(naedtech@yahoo.com)
Thanks and regards,
James ponraj. ■
Conveyor Calculation
Dear sir,
I am working as a project manager in oneof the malaysian company.I need the conveyour calculation method.Please send me the pdf to me.(naedtech@yahoo.com)
Thanks and regards,
James ponraj. ■
Re: Design Calculations For Pneumatic Conveying
Dear Amrit,
I am working on a pneumatic transport that was modified and after that it didn't work well any more, and after reading the forum I think that may be you could help me with your experience.
The conveying is done in dilute phase mode, we are transporting snacks at a top rate of about 800 kg/h but the issue is that it come from two diferent point, to only one cyclone, half from each point.
We have two identical blowers that collects product with the use of venturi feeders and then almost with identical pipelines, goes directly to the cyclone.
Originaly we only had one circuit and it worked fine but after adding the second pipeline just turning on its blower, the first circuit decrease its capacity considerably, and sometimes even gets blocked.
It is possible to improve the system performance adding another blower, but in this case to the cyclone, with the idea to produce vacuum on it? Could you recomend me any other modification?
I would really apreciate if you can help me and please send me a copy of "Theory and Design of Pneumatic Conveying Systems" and also the software you had developed.
Thanks and regards
Matias ■
Re: Design Calculations For Pneumatic Conveying
Dear Amrit,
I am working on a pneumatic transport that was modified and after that it didn't work well any more, and after reading the forum I think that may be you could help me with your experience.
The conveying is done in dilute phase mode, we are transporting snacks at a top rate of about 800 kg/h but the issue is that it come from two diferent point, to only one cyclone, half from each point.
We have two identical blowers that collects product with the use of venturi feeders and then almost with identical pipelines, goes directly to the cyclone.
Originaly we only had one circuit and it worked fine but after adding the second pipeline just turning on its blower, the first circuit decrease its capacity considerably, and sometimes even gets blocked.
It is possible to improve the system performance adding another blower, but in this case to the cyclone, with the idea to produce vacuum on it? Could you recomend me any other modification?
I would really apreciate if you can help me and please send me a copy of "Theory and Design of Pneumatic Conveying Systems" and also the software you had developed.
Thanks and regards
Matias ■
Re: Design Calculations For Pneumatic Conveying
Dear Mr. Matias,
Rather than adding vacuum blower why not add another cyclone for the second system, so there is no interference. ■
Re: Design Calculations For Pneumatic Conveying
Dear Mr. Matias,
Rather than adding vacuum blower why not add another cyclone for the second system, so there is no interference. ■
Calcium Carbonate Conveying
Dear sir,
I am an engineer working in plastic factory. Could you please give me the calculated results from following data.
Material to convey : Calcium carbonate
Conveying rate : 1500 kg / hrs.
Line diameter : 2 inch
Starting from the inlet, line is 4 meter horizontal, then 90 degree long radius bend, then line is 6 meter vertical, then 90 degree long radius bend connected to the inlet of receiving bin.
Conveying line material : stainless steel pipe
Use ambient air at standard conditions.
Need to know : pressure drop in a vacuum type conveying system and
: type of blower and power used
Your assistance is much appreciated.
Visanu ■
Calcium Carbonate Conveying
Dear sir,
I am an engineer working in plastic factory. Could you please give me the calculated results from following data.
Material to convey : Calcium carbonate
Conveying rate : 1500 kg / hrs.
Line diameter : 2 inch
Starting from the inlet, line is 4 meter horizontal, then 90 degree long radius bend, then line is 6 meter vertical, then 90 degree long radius bend connected to the inlet of receiving bin.
Conveying line material : stainless steel pipe
Use ambient air at standard conditions.
Need to know : pressure drop in a vacuum type conveying system and
: type of blower and power used
Your assistance is much appreciated.
Visanu ■
Design Calculations for Pneumatic Conveying
My article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" was published this month in
href="https://who.bulk-online.com/profile/2-reinhard-h-wohlbier.html" target="blank">Powder Handling and Processing magazine. This article gives an easy to use Excel-based calculation method for designing new dilute phase pneumatic conveying systems or for improving the performance of existing conveying systems.
Regards,
Amrit T. Agarwal
Consulting Engineer
Pneumatic Conveying Consulting Services
Email:
href="mailto:polypcc@aol.com">polypcc@aol.com
Ph and Fax: 304 346 5125
Picture added by Adinistrator as an example:
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