ligne pâte à papier - pulp production

Clextral designs, builds, installs and maintains turnkey  BIVIS pulp production and lines. Clextral paper pulp machines offer distinct advantages compared to conventional pulp processing: lower production costs and a reduction of effluents, pollution and water consumption. Clextral lines are also more compact and energy efficient. They produce a wide range of products, such as pulp for writing paper, cardboard and banknote paper and can process a variety of raw materials, including softwood and hardwood, textile fibers, annual plants, agricultural waste products and recycled fibers. 

Pulp production

Clextral has been developing twin-screw BIVIS technology to manufacture paper fibers from wood and non-wood raw materials for over 30 years, in cooperation with research institutes and manufacturers. The heart of each line is its twin-screw configuration, custom-designed with intermeshing, co-rotating screws inside a barrel including liquid injection ports to achieve required specifications. The lines ensure continuous end-to-end processing, including raw material handling and cleaning, fiber defibering and mixing, chemical impregnation, compression, shearing, pressure control, heat transfer, liquid or gas injection, solid/liquid extraction and washing. A typical twin-screw line therefore includes three basic sections: wood or fiber preparation, pulping and refining.

Clextral twin-screw process features

Clextral twin-screw BIVIS paper pulp machinery offer major advantages compared to traditional systems:

  • Higher pulp yield, through continuous processingBivis machine for paper pulp production
  • Cost effective and environmentally-friendly manufacturing
    • 10 to 15% reduction in energy consumption for fiber separation
    • 10 to 30% decrease of chemicals and bleaching agents
    • Reduced water consumption, from 30% up to 90% for certain pulp processes
  • Compact turnkey installation, requiring less floor space and simplifying engineering requirements
  • Production of specific pulps for a wide variety of applications
  • Versatility in the use of wood and non-wood raw materials
  • Capacity: 50 to 5,000 BDKg/h
  • Motor Power: 50 to 2,000 KW

Clextral also offers its expertise and inhouse facilities  to enable papermakers and research centers to develop and test new concepts and improve processing.

Visit our pages dedicated to cellulose pulp applications