Detrashing Systems for Low and Medium Consistency Pulping

 

With the use of contaminated secondary fibers, it is important to remove the contaminants from the process as early as possible to prevent size reduction, improve stock preparation line runnability, increase productivity, and reduce maintenance costs.

 

Kadant detrashing systems apply to applications with low and medium consistency pulping in order to remove as much as 95% of the total contaminants.

 

Kadant has two basic designs for detrashing:

  • Cleaning Poire
  • Hydrapurge™ reject defibering system/Selectpurge™ reject screen

 

These systems can be associated with other pieces of equipment, such as the junk trap and the trash well, in order to remove heavy destructive or large floatable contaminants, before they reach any rotating device.

 

Kadant also has a complete range of raggers and rag rope cutters.

 

Working Principle

Both the Hydrapurge reject defibering system and Cleaning Poire enable the stock to be screened at the pulping section in order to separate the contaminants at a very early stage before they reach any pump.

 

The cleaning Poire is a one stage concept, operating discontinuously, and introducing a washing cycle before rejecting the contaminants in order to reject virtually fibre free contaminants.

 

The Hydrapurge reject defibering system, in connection with the Selectpurge reject screen, rejects continuously contaminated stock. The Hydrapurge reject defibering system includes a strong defibering action allowing part of its output to be accepted and consequently increasing the pulping capacity. The Selectpurge reject screen is a special heavy duty trommel drum allowing the recovery of fibers and rejecting virtually fiber-free contaminants.

 

Applications

 

  • Secondary fiber stock preparation lines

 

Features and Benefits

  • Excellent contaminant removal
  • Excellent runnability
  • Reduced maintenance costs

 

Cleaning Poire

  • Extremely compact
  • Economical
  • Ideal for small and medium capacity systems

 

Hydrapurge reject defibering system and Selectpurge reject screen

  • High decontamination capacity
  • Parallel pulper, increasing the capacity of the line
  • Ideal for medium to large capacity systems
  • Flexible layout

 

For more information on detrashing systems, request product information using the link above.