Pneumatic Conveying Systems

UNICON and its forerunner companies have been designing, manufacturing, supplying and erecting pneumatic conveying system for many years. Our installations have enabled our customers to operate their facilities in compliance with regulatory standards to achieve clean air environmental friendly emissions and effective utilization of Fly Ash. Please Click Here to download our Questionnaire and to send an enquiry.

The chemical composition of ash varies aluminium oxide, silica oxide, iron oxide, calcium oxide and other compounds are found in varying proportions. Particle size , particle density, particle shape and size distribution can also be very different. Type of Ash and temperature of Ash to be conveyed is an important factor to be considered. Ash types vary as a result of different fuels, different combustion methods different flue gas treatments, and various boiler designs

Principle of operation

Stage 1 : Filling
Ash inlet is at open position, ash from hopper storage is filled inside the vessel.

Stage 2 : Fluidizing
When ash is filled up to the level sensor probe, Ash inlet valve will be closed. Once fluidizing valve opens and fluidizes the ash and is ready to transport.

Stage 3: Transmitting
Discharge valve opens and the fluidized air with ash is transmitted through the pipeline.

Stage 4 : Depressurizing
Ash inside the vessel is emptied, the vessel is depressurized and the fluidizing valve closes, again the process is repeated from stage 1. the pressurized vessels feed to the conveying line, the automated control system maintains a constant conveying air mass flow in the pipeline, which prevents plugging and optimizes compressor operating power. Feeder units feed the line however in these system, material flows into the conveying line before the line is pressurized. It is a practical alternative for a vaccum system where headroom is limited.

This approach, blending the most efficient flow regimes offers advantages in reliability and reduced maintenance costs that can keep the system operating more efficiently.

Challanges of ash handling system

Indian Coal presents high ash content generally which tends to be inconsistent. Design of the system has to adequately cover anticipated variations and be capable of handling the worst scenario.

System has to be environment friendly.

System has to be reliable with least maintenance problems

System has to be energy efficient.

Advantages UNICON Pneumatic Conveying Systems

Commercial utilization of ash in
 - Cement additives     
 - Brick plants.      
 - Road making etc

Saving of water - a precious commodity.

Energy Efficient.

Most Economical

High Capacity Conveying Line

High reliability.

Long Plant life.

Least maintenance.

Conveying distance upto 1600 meters

Environment concern.

Wide range of vessel sizes

Operating pressure upto 60psi (415 kpa)

Shortest delivery time

Programmable Logical Controller (PLC)

Better control of pneumatic conveying system whose advantages are given below.

1. Most preferable type of control.

2. Ability to perform relay logic, timing, counting and sequencing functions.

3. performs the tasks required for pneumatic conveying system control.

4. Performs all ash handling controls.

5. Allows flexibility in control schems

6. Ability to troubleshoot, modify and expand with the system.