Tube Conveyors

Environmentally friendly bulk material transport is possible with tube conveyors as they overcome one of the main problems commonly associated with conventional conveyors.

A tube conveyor resembles a conventional conveyor at the tail end where the material is loaded. From here, the open belt then passes through a series of transition idlers that shape the belt to form a tube for the length of the conveyor. Just prior to the head end, the encapsulated belt passes through another set of transition idlers to open up and allow conveyed material to be discharged in the standard manner. On the return side, the belt is again formed into a tube shape.

Environmentally friendly

Tube conveyors are becoming increasingly popular, especially in environmentally sensitive and built-up areas as interactions between the environment and conveyed material (such as dust emissions and water absorption due to rain or snow) are eliminated by encapsulating the material while in transportation. Valuable product is also protected from theft along the conveyor path.

Curved and steep incline conveying

Compared to typical belt conveyors tube conveyors have very small curve radii, and this tube shape allows the conveyor to curve horizontally as well as vertically. This very flexible conveyor routing often means that a single tube conveyor can replace several conventional belt conveyors, reducing:

  • The requirement for multiple transfer points and drives that require more cost, space and power to lift product at repeated transfer points
  • Product degradation and dust generation at transfer points
  • Costly chute liner replacements

Increased friction between the tube shape of the conveyor and material also makes steep inclines possible – generally up to around 50 % steeper than what is possible with a conventional conveyor. This means that:

  • Overall length of the conveyor system may be reduced
  • Conveyor and thus plant footprint can also be reduced with further cost savings

TAKRAF boasts an impressive record of global tube conveyor installations across various commodities. With increased attention and focus on environmental sustainability, a tube conveyor may just be the conveying solution you are looking for.

References

  • Customer
    Project Name
    Maritza East 1 power plant residual transport
    AES
    Power plant Maritza East
    2010

    Tube conveyor at power plant Maritza East

    The tube conveyor was selected to transport residual materials (ash and gypsum) from the power plant to the disposal area by two reasons:

    • Environmental friendly transport without influencing material and surroundings
    • Conveyor routing following the natural terrain with tight horizontal and vertical curves

    The tube conveyor is running in eight horizontal curves with 350 m to 500 m radius. To ensure the correct overlap position at the discharge area the patented belt training system (BTS) is used.

    Project figures

    4,535 m
    1,500 mm / 400 mm
    4 x 500 kW
    1,400 t/h
  • Customer
    Project Name
    DARS (Dry Ash Removal System)
    Enel Russia
    Reftinskaya GRES power plant
    2014

    Tube conveyor for dry ash removal system

    TAKRAF has delivered the complete residual material handling and disposal system including:

    • Long distance material transport with tube conveyor
    • Transfer tower to feed the dumping system or the emergency stockpile
    • Dumping system with shiftable conveyor, tripper car and stacker
    • Emergency stockpile with radial stacker

    Tube conveyors are very common in residual material transportation due to the encapsulation of the material. Special feature of this project is the ambient temperature of minimum -45 °C combined with a material temperature of maximum 90 °C at the tube conveyor feeding point.

    The tube conveyor is running in five horizontal curves with 420 m to 630 m radius. To ensure the correct overlap position at the discharge area the patented belt training system (BTS) is used.

    Project figures

    4,390 m/ 30 m
    2,000 mm/ 570 mm
    6 x 800 kW
    2,200 t/h
  • Efficiency

    • We design, fabricate and supply a wide-range of tube conveyors catering to clients' specific needs and requirements
  • Service

    • Flexible conveyor routing allows for the reduction in the number of transfer points
  • Environment

    • Significantly reduced environmental impact due to encapsulation of transported material (reduction specifically in dust emissions)
    • No transported material contamination

CONTACT US

Do you have any questions or would you like further information?
We look forward to your inquiry at: info@takraf.com

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