18.6.09

Open Impeller Slurry Pumps

http://www.chemfluidpumps.com/

the Samson AM series is capable of handling solid size of 30 mm and solid content of 30 %
It is very popularly used in PalmOil mills effluent pond and sludge pit
The shaft diameter is 38mm and with heavy duty bearing pedestal

8.6.09

PNEUMATIC CONVEYING - AIR FLOW REQUIREMENT & CYCLONE DESIGN

Information Required To Size A Blower

Example
Product : Dried Cocoa Shell
Capacity : 400 kg/hr
Density : 0.55
Total Pipe Length : 330 ft
Vertical (static head ) : 40 ft
Nos of Bends: 5 nos
Pipe diameter : 3 ''

The above will need about 330 m3/hr of air and operating pressure of approx 400 m Bar
and Motor Kw is about 7.5 kw

The air volume is very much dependent on capacity and density of product to be transfered
Pressure is the static head plus pressure losses on pipe length and fittings

For drive arrangement ,best option is belt driven if you need to fine tune the
performance of blower to the closest duty in actual operation

In conveying of Plastic resins .the discharge temperature is an important factor .if
temperature is too high the plastic resin may melt or get distorted in shape and size

For Areation application in Sewage Treatment Plant , air volume is equally important
but is often ignored
the right amount of air used will ensure effectiveness of the areation

Another important equipment in pneumatic conveying is the Cyclone
Most of the time .people will look at the blower if there is problem
The Cyclone has correctly design to suit the application allowing right pressure drop for product of different density,so that the lighter particle get transported away and heavy particle get collected at the bottom of the cyclone

Assuming the Cyclone is designed to handle a fixed capacity and a particular density
Increasing the fan speed will cuase more lighter particle to be carried over
and reducing the speed /capacity will cause a drop in throughput
In the wood industry dust collector cyclone system,there ia a battery of cyclones to handle different particle size /density
and at the last stage .only air(without any dust ) is discharge from the system .