Boiler & Turbines

Recovery Boiler Assessment

The recovery boiler assessment study started in July 2017 and is an ongoing, Mondi-wide project, which is going to be carried out across various mill locations. The project is separated into two main tasks:

Assure highly efficient, sustainable recovery boiler operation by

  • identifying limitations of any kind
  • minimizing risks from maintenance practice
  • developing and supporting adequate plans for improvement
  • risk and claim management

Support the client's strategy of low-cost assets:

  • reliability-centered maintenance and operation
  • reduced TCO (Total Cost of Ownership)

The project started in Richards Bay - South Africa, followed by Dynäs – Sweden and Frantschach – Austria.

Project Phases

Phase a: Commercial & Technical Maintenance Analysis

  • Data collection and data screening
  • Workshop regarding operational parameters and on-site evaluation
  • Basic design evaluation
  • Technical maintenance analysis
  • Commercial maintenance analysis

Phase b: Operational Analysis

  • Balance mass / energy, CL & K balance
  • Laboratory analysis of black liquor, ash and carry-over samples

Phase c: Quality Inspections

  • Quality inspections during shutdown
  • Boiler walk down, accumulation report

Further References

Mondi SCP

Ružomberok, Slovakia

SAPP Management AG carried out operational analyses for both boiler boiler, as well as a boiler tuning for the new boiler. In order to define the required capacity for the ash cleaning system, a mill-wide potassium and chlorine balance was done. Moreover, several technological alternatives for the ash cleaning system were examined in terms of operational cost, removal efficiency, and investment cost, out of which the best alternative was proposed.

MM Karton AG

Količevo, Slovenia

SAPP Management AG supported Mayr-Melnhof Karton AG Količevo during their shutdown in December 2019. The main tasks of SAPP comprised a visual boiler inspection, tube measurement by ultrasonic wall thickness testing (UT), material analysis by spectroscopy, as well as the supervision of weld repairs, including non-destructive testing (NDT). Furthermore, SAPP carried out a risk assessment of the gas boiler.

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