Customer case:

Easy to control the process with Valmet Optical Consistency Measurement

An anonymous pulp mill in Japan was facing the challenge of maintenance and increasing cost of old rotary transmitter. They searched the solutions on the market, like microwave transmitter, however, the harsh process in the mill, for instance, the high chemical concentration and conductivity level are not fit for microwave transmitter.

Summary
Background

An anonymous pulp mill in Japan

  • Production capacity: 500-600 t/day approx.
  • Pulp: hardwood unbleached kraft pulp
  • End product: sack paper
  • Cs % : 2~3%
  • Process : 1st screen feed (drum washer→Pulp knot→1st screen)
Customer challenge
  • Maintenance challenge and increasing cost of old rotary transmitter
  • Harsh process not fit for microwave transmitter, due to high chemical concentration and conductivity level.
Solution

Valmet Optical Consistency Measurement (Valmet OCS) designed for chemical pulping process to reliably measure the process at 1st screen section of Digester. (Black liquor )

Results
  • Easy to control the process by quick response sensor driven operation.
  • Manual Control process without any unstable situation.
  • No service or maintenance needs after commissioning since 2018.
Keywords Valmet OC, Consistency, pulp mill, Automation, Japan

Optical Consistency Measurement, OC

The Valmet Optical Consistency Measurement (Valmet OC) is part of the Valmet portfolio of consistency transmitters that uses state of the art technology with a new design, offering reliable measurement at all times.