Dear cnwinamp,

If you do need the described installations, it is advisable to consult a supplier with knowledge and experience, rather than designing and building this installation yourself.

Calculating the airflow , pipeline diameter and resulting parameters is just a small (though very important) part of the project.

Deciding how you size, configure and build the auxiliary equipment around the basic design is much more complicated and risky. That is where you need the experience of a company, who has done this before and learned from earlier mistakes.

As your installation is not special, the design may be already on the shelf.

success

Teus ■

Yet another request for free consultancy. ■

Dear cnwinamp,

In case of a real project, suppliers can quote an installation, if asked.

Whether it be a cost indication or a quotation based on an agreed specification with the intention to order from one of the competitors.

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From your given parameters, it can be derived that you use 34 m3/min air for the short pipeline (25 tons/hr PP) and 14 m3/min air for the longer pipeline (10 tons/hr PP)

Using the same SLR (10 kg PP per sec / 1 kg air per sec)

This will result in a higher pressure for the longer pipeline.

The general rule is as follows:

In case the air velocity and the pressure drop are set constant, the solid loading ratio follows approx. the equation:

SLR = constant * Length ^ (- alpha)

This means that you can reach a higher SLR at shorter pipelines.

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This kind of knowledge and the additional equipment and operational experience of suppliers is required to design a reliable installation.

Gaining those capabilities is not an overnight effort.

Consult somebody with proven experience in PP conveying or visit other installations.

This is a free advice

best regards

Teus ■

I always thought this forum was all about free consultancy !!!

You haven’t mentioned the number of bends?

For the first line assuming there are 3 bends in the line you can do 25 tph in a 6” line with 1500 m3/hr of conveying air. System pressure drop will be between 310-350 mbar for 20 V & 5H length . 30 kw blower will do the job.

For second line assuming there are 5 bends in the line you can do 10 tph in a 5” line with 1150 m3/hr of conveying air. System pressure drop will be between 275-300 mbar for 90 m total length. 22 kw blower will do the job. ■

I would like to suggest that you run conveying system design calculations yourself using the detailed method given in my article "Theory and Design of Pneumatic Conveying Systems". This will be a better approach for you than for us to run calculations for you.

Best regards,

Amrit Agarwal

Pneumatic Conveying Consulting

Email: polypcc@aol.com

Ph and Fax: 304 346 5125 ■

Is calculating a pneumatic conveying system by yourself, using a calculation program of which you do not really know the background or the underlying theory, not a considerable risk?

take care

Teus ■

Free advice, free guidance but many make their living from bulk materials handling. Why should they give away ALL of their knowledge and experience for NO RETURN? ■

No one is compelling anybody to shear there knowledge for free. If you don’t want to give advice here by all means don’t do so. I am sure no one will force you.

I guess only nature does good things for free these days. ■

hi, cnwinamp,

every coin has two sides, pneuamtic conveying also has its advantage and disadvantage.

for pneumatic conveying PP, the characteristric of bulk solids should be learn. avoiding some unexpected problems, the cohesive is very important to pneuamtic conveying

also, some plastic particles will become soft when temperture reach to a certain piont, it is disadvantage to transprot these kinds of particles, also having adverse effect to filter.

you can contact with me using :kevinjcg@hotmail.com

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