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Pulp and Paper

Klarex selfcleaning heat exchangers

High-fibre sieve water. Steam condensate. A vertical shell and tube heat exchanger and... the non fouling particle flow.


In Western Europe, we annually use more than fifty million tonnes of cardboard and paper. The European cardboard and paper industry processes some twenty million tonnes of paper waste each year. That is approximately 35% of the total cardboard and paper consumption. Fibre is needed for the production of cardboard and paper. Western European cardboard and paper manufacturers retrieve 35% of the fibre they require from used paper. During the production process, high-fibre sieve water is discharged which is often heated by heat exchangers. With non fouling heat exchangers, fibre may still form a deposit on the heat exchanging surface, forming a layer of fibre that hinders the heat exchange and may even block the heat exchanger. In order to avoid this problem, it is possible to inject the steam directly into the sieve water. However, this has the disadvantage that it thins the sieve water and results in the loss of valuable condensate.

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heater Cases
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