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04.06.2018 Circular conveying system optimises capacity and prevents contamination

Poeth Solids Processing, Tegelen, the Netherlands, has developed its new C-Conveyor specifically for applications where there is a requirement for powders, pellets or granulate to be fed back vertically into the production process.  It has been designed to optimise the production capacity of recirculating conveying systems while at the same time minimising contamination risk. The C-Conveyor is explosion-proof, so no costly investments in ATEX protection are required. Low energy consumption is a further benefit.
Poeth points out that vertical conveying and reintroducing raw materials into the process is a common requirement. Thoroughly emptying conveying systems is extremely important and one of the main conditions for an efficient and contaminant-free production process. However, effectively emptying traditional bucket elevator systems, particularly when conveying lightweight, fine powders, is more easily said than done. Buckets attached to a belt or chain scoop dry raw materials from base of the elevator (feed point). At the discharge station, the product is thrown out of the buckets, powerfully but at low speed, under the influence of centrifugal force. Residues of the raw material are often left behind, particularly in the case of lightweight materials. The result is a loss of capacity and cross-contamination in the elevator base. When handling potentially explosive raw materials, the minimum conveying speed is the bottleneck for bucket conveyors. Capital-intensive investments in ATEX protection are required as a result.
The C-Conveyor has been specifically designed for efficiently recirculating light powders and explosion-prone raw materials. The company has invested in an in-house C-Conveyor test unit with a height of 9m. This is used to replicate practical situations, perform long-term ‘closed loop’ testing and subject customer products to trials in a production environment. 
C-Conveyor from Poeth Solids Processing

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