How Pneumatic Blender Works? Blender is charged with powders to be blended in the blender either by...
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How Pneumatic Blender Works?
• Blender is charged with powders to be blended in the blender either by pneumatic conveying or otherwise.
• Air is blown into powder bed through fluidizing cone
• After the powder in the vessel is completely fluidized, Agitating air pulses are introduced through bottom nozzle.
Contd..
How Pneumatic Blender Works?
• Agitating pulse duration is about 300 to 500 milli seconds.
• Interval between pulse is around 20-35 seconds.
• After about 30 to 40 minutes pulsing is stopped and material is discharged through bottom nozzle
• While discharging fluidizing air is still blown in the material to avoid segregation of material.
Data Required For Designing Pneumatic Blender
• We need to know following properties of material.
• Particle Size (Maximum and Minimum)• Standard deviation between particle sizes• Fluidizing Property of Material/ Powder
All above properties can be checked at our works.
Comparison between mechanical & Pneumatic Blending
Mechanical Blenders• For 5 T powder Blending
Required time is about 3-4 Hrs• Temperature rise of blend is
about 20o to 30o C• For 5 T blender about 30Kw is
required for 4 hrs.= 120Kwhr• Some Pigments are sensitive
to temperature rise thus causing loss of quality
Pneumatic Blenders• For 5 T blending time is
about 40 minutes.• No Significant Temperature
rise.• Total Power consumption of
5kW for ½ Hr.= 2.5 kwhr.• No temperature rise hence
no loss of Quality
PID for Pneumatic Blender
Pneumatic BlenderGeneral Arrangement
Inside Details of Pneumatic Blender