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Process Modification - Recovery of Fibre from Couch Pit and 2nd Stage Centri-cleaner

Description

This case study describes how reprocessing of fibre as Couch pit and 2nd Stage Centri-cleaner accept could be reduced by modifying the route of pulp and efficient fibre recovery.

Implementing Industry

Vaibhav Paper Boards Private Limited is a medium scale manufacturer of kraft paper located in Vapi Industrial Estate. Industry was established in 1996, with present production Capacity of 70 TPD and an Annual Turnover of 50 crores.

Implemented technology / technique

BEFORE:

  • During Kraft paper manufacturing process, accept of 2nd Stage Centri-cleaner collected in Couch pit was reprocessed after screening through inclined screen and sent to the thickener.

  • The inclined screen was found to be non-efficient and there was a loss of about 5% (based on 70 TPD production) fibre with the rejects.

AFTER:

  • Additional side Hill screen is placed in process, after the couch pit, to reduce continuous recirculation of pulp with direct supply to mixing (machine) chest after screening and fibre recovery with by-passing thickener and refiner. 

Economic benefits

Total capital cost invested by industry was Rs. 1,70,000 with total saving of Rs.14,17,500 per annum giving a simple payback in 2 months.

Contact details 

Mr. Suresh C. Desai (G. M. Tech.); suresh@vaibhavpaper.in