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Pneumatic Conveying Systems

Pelletron’s highly specialized Bulkmatology® team has many years of knowledge and experience in designing and building systems that meet the unique and individual needs of its customers.

Whether it is de-bottlenecking an existing system or designing a complete turnkey plant from the ground up, Pelletron’s extensive know-how and experience ensures that solutions are efficient, cost-effective and meet the industry’s highest standards of quality. Pelletron’s project managers are familiar with national and international standards, and are supported by local service providers and suppliers.

Discover pellcon3®: Optimized Pneumatic Conveying Solutions

See how the combination of STRANDPHASE®, the Pellbow® and our DeDuster® can save you money.

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siloadmaxX® container loading

Explore the dust free container loadingsystem for all dry bulk materials

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Comparison of conveying modes

Dilute Phase Conveying

High gas velocities:	v = 25-40 m/s v = 5.000-8.000ft/min
Low product to air ratio:	range 1-5 to 1
Low to medium pressure drop:	p = 0.1-1.0 bar p = 1.5 – 15 psig
Special pipe support requirements:	No

Dilute phase characteristics:

High dust volume
Mostly coarse dust long and short streamers, depending on the product
Dust surges at the end of the unloading process
Low investment costs
Difficult dust removal because of high dust volume and streamers
High product losses in form of dust

Typical conveying layouts for polyolefine plants

Dilute Phase Conveying – Traditional layout with elutriators for dust separation

1 Compressed Air Supply 2 Blender 3 Elutriator (dedusting) 4 Storage Silos

These systems can be upgraded easily with mobile or stationary DeDusters located under the silos.

Traditional solution with elutriator Modern solution with stationary or mobile DeDuster®

Dense Phase Conveying

Low gas velocities:	v = 2-10 m/s v = 400-2.000ft/min
High product to air ratio:	range 15-50 to 1
High pressure drop:	p = 0.5-3.5 bar p = 7 – 50 psig
Special pipe support requirements:	Yes

Dense phase characteristics:

Low dust volume
Very fine dust, but high electrostatic charged dust, sticks to the pellet surface
No streamers through conveying
Streamer formation caused by purging
High investment costs
Very difficult to remove the electrostatically charged micro dust
Low product losses in form of dust

Typical conveying layouts for polyolefine plants

Dense Phase system without dust separation

1 Compressed Air Supply 2 Blender 3 Silo

These systems can be upgraded easily with mobile or stationary DeDusters located under the silos.

Modern dense phase system with stationary or mobile DeDuster®

STRANDPHASE Conveying

Optimized gas velocities:	v = 15-25 m/s v = 3.000-5.000ft/min
Medium product to air ratio:	range 5-18 to 1
Medium to high pressure drop:	p = 0.5-2.0 bar p = 7 – 50 psig
Special pipe support requirements:	No

STRANDPHASE® characteristics:

Low to Moderate dust volume
Mostly coarse dust and some short streamers, depending on the product
Low to moderate investment costs
Easy dust removal with DeDuster®
Low to moderate product losses in form of dust

Typical conveying layouts for polyolefine plants

Strandphase Conveying with Pellbows and dedusting under the silos

1 Compressed Air Supply 2 Blender 3 Silo 4 DeDuster® (mobile or stationary) 5 Pellbow®

For new installations, Pelletron recommends the pellcon3 system, utilizing STRANDPHASE conveying, Pellbows and DeDusters.