The pneumatic conveying system is a method of conveying dry material in a pipeline through air without any moving parts. The pneumatic conveying is necessarily custom made conveying system & based on product characteristics, particle size, throughput capacity, number of sources and number of destinations. Each pneumatic conveying system is designed & customized as per the application popularly known as custom conveyor system. The provided solution is assured to be the best pneumatic conveying system solution for the application. Being the application experts & pneumatic conveying system manufacturer, we always assure to deliver best of both the worlds (commercial & technical worlds).
Indpro’s Pneumatic conveying systems are sold as ‘VAAYU’ in market. The name comes from the Sanskrit word ‘VAAYU’ which means air. So, it depicts the conveying through air.
Prime mover can be:
Roots blower, Centrifugal blower, Centrifugal fan, Radial blower, Compressor or compressed air.
Rotary air lock valve or airlock valve, Rotary valve, Rotary feeder, Ventury injector or ventury eductor, Pressure vessel.
Pneumatic conveying Bends:
Wear resistant bends, Long radius bends, ceramic lined bends.
Flow diverter valves:
Diverter valve, Dual tunnel diverter valve, Ball diverter valve, single tunnel diverter valve.
Product & air separator:
Cyclone separator, cyclone separators, dust collectors, bin vent dust collectors, bag filters, dust collector, air pollution control system.
Typically pneumatic conveyor system is categorised into - Pressure pneumatic conveyor or pressure conveying system & Vacuum pneumatic conveyor system or Vacuum conveying system or vacuum conveyor each is sub categorized in dilute phase conveying and dense phase conveying system.
Dense phase conveying is a widely known as plug flow systems which is non-suspension flow. The product is filled in a pressure vessel, which is then pressurized with the air or gas to be used for conveying. Once a pre-set pressure is reached inside the vessel, the bottom discharge valve opens and the material is conveyed to the destination. The material to air ratios is higher in dense phase conveying in the range of 20 to 100 kg/kg of air. Dense phase conveying uses compressed air and requires an air compressor. Dense phase conveying is used for high capacity and long distance conveying. Dense phase conveying employs the pressure vessel with valves and instrumentation which is controlled through PLC based control panel.
Dilute phase is a suspension flows wherein the material to be conveyed is introduced into a moving air stream inside a pipeline. For the material to remain in suspension there is a minimum conveying velocity which varies for different materials. The quantity of material that is fed into an air stream is also dependent on material characteristics like bulk density, particle size, sieve analysis, frequency distribution etc. Generally, the material to air ratio varies between 3 to 10 kg of material to kg. of air. Conveying velocities are in the range of 18 to 28 m/sec depending on the product characteristics. The dilute phase conveying system uses low-pressure air at pressures less than one bar in case of pressure conveying and (-) 5000 mm in case of vacuum convening, which is generated by positive displacement type roots blowers or by centrifugal blowers.
Dense phase vacuum conveying systems are used for very short distance of conveying typically below 15 mtrs with 1 or 2 bends. The components are specially designed suction nozzle ,conveying piping ,product separator and airlock valve. These systems are operating below (-) 5000 mm of WG using roots blowers and used for product conveying from bags/drums or hoppers.
These vacuum pneumatic conveying systems are installed primarily wherein multiple feed points are involved. The advantage of this system is any leakage is inward due to which these systems are popular for conveying of explosive or hazardous products. As the system is operating below the atmospheric pressure the conveying velocities are generally higher than the pressure conveying. These systems are also popular for short distance conveying in food and pharmaceutical industries.