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.
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.
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.
4,535 m 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.
4,390 m/ 30 m 2,200 t/h
- We design, fabricate and supply a wide-range of tube conveyors catering to clients' specific needs and requirements
- Flexible conveyor routing allows for the reduction in the number of transfer points
- Significantly reduced environmental impact due to encapsulation of transported material (reduction specifically in dust emissions)
- No transported material contamination