A conveying system of any kind is used to transport a material from one source place to destination or

receiving place. For the chosen method of pneumatic conveying, air is used as the transport medium. It is

applicable to most fine powder to granular materials, be they in that form naturally or have to be pulverised or

crushed. In this system, energy is needed to accelerate the material from rest, to lift it as required and to

overcome the losses due to friction. Rice husk is by-product which results from paddy, the husk is removed by

friction as the paddy grains pass between two abrasive surfaces that move at different speeds. It has been used

explains the setup used for this trials, characterization of material used as feed, conveying parameters

achieved.

To identify the root cause and appropriate type of pneumatic system for low density material & impact of

moisture in rice husk in lean phase.

Pneumatics conveying is often the perfect solution for the conveyance of dry powder form materials:

overpressure and under pressure create a fast air flow inside the pipelines, which transports the material

directly to the desired location. Safe, simple and cost-efficient. This makes pneumatic conveying the optimal

methods for powders or granules. It’s most often used with non abrasive, nonfragile materials that have a light

bulk density.

air to transport bulk solids / powder in pipes. Dense phase conveying differs from the other main technology of

pneumatic conveying, dilute phase, by the fact to use only a small weight of air compared to the weight of

Rice husk conveying tests been conducted on the existing setup at Conveying Flow Lab. The feed station

having opening for bags discharging, fed the rice husk as received and discharge via rotor valve. The negative

pressure (Vacuum conveying) conveying been setup for this application.

At first, fed the material in feed station through batch wise as can see in fig 2. The bin mounted vent filter

dumped, simulating the site conditions where usually by means loaders will dumped the rice husk for

transportation. While doing so, observed the material sticking inside the rotary air lock and jamming occurred.

This lead to conduct the flowability test to record the flow properties of rice husk

In Dilute phase pressure conveying material might stuck in flanges or in gasket. There are chances of leakages

in this type of systems. Trial which we did on Rice Husk. moisture is present in it because of that we face

issues/challenges in pending/Turing areas material is sticking in these areas. These are some challenges we

face. Material properties are mentioned below. When the material is conveying material

Angle of repose- 45 DEG

We use Dilute phase conveying for Rice husk trail

Qty of Feed Material Received = 8.5 kg

Qty of Feed Material Conveyed = 8.5 kg

Particle size - (+5 MESH= 19%), (+ MESH= 26%), (+10 MESH=35%), (+20 MESH=76%)

Initial Pressure/ Vacuum (MMHG) – 120 bar

Capacity that we achieve- 8.5Kg

Rice husk which is having many usages as mentioned earlier, to convey material through dilute phase system

one should design the hopper discharge system with valve size relatively bigger so it will discharge smoothly.

The Vacuum conveying method gives better results due to silica issues in the feed material rather than pressure

and any other mode.

Author

infrastructure. The co-authors are deeply acknowledged for their contribution is data preparation, discussing

the variations to put up a comprehensiveness of the paper in logical fashion.