Downtime assembly work at Ahlstrom-Munksjö

airinotec is once again able to verify its competence as a retrofit specialist

As one of the leading suppliers of fibre-based materials, Ahlstrom-Munksjö always relies on a smooth production process. For a retrofit project, in which an existing paper machine had to be modernised, Ahlstrom-Munksjö decided to utilise the services provided by the retrofit specialists from
airinotec. With excellent results: Energy consumption and noise emissions were lowered and production conditions could be improved.

The project target: higher energy efficiency, improved production conditions
The object involved in the retrofitting project was the PM3 paper machine with a production capacity of 8 tons/hour with a working width of 3 m. Ahlstrom-Munksjö hereby specified a number of objectives: Energy should be saved and the climatic production conditions in the hall should be improved - as well as the noise protection against noise emissions to the outside. Furthermore, there was a request for setting up a new automation and measurement data acquisition and recording system, and a dew point regulating system was to be implemented for the pre-drying and post-drying sections in order to record the interchanging production conditions.

Well thought-out planning ensures reliable implementation during downtime
The advance planning involved for such a project is imperative in order to keep the impact on production as low as possible. The pre-assembly work was subsequently executed during ongoing production. The shutdown assembly work followed at the turn of the year 2018/2019. Production started again on schedule after the conversion and commissioning were completed.

The result: an optimised paper machine

Ahlstrom-Munksjö's expectations for the project have been fulfilled throughout. The customer was particularly impressed by the precise planning: Disruption for work processes was kept to a minimum by adhering to the schedule. Retrofitting during ongoing operation also provides additional advantages. Steam is no longer required for heating up the process ventilation, which has therefore significantly reduced the energy costs. Moreover, the quality of the working environment has been improved: The significantly reduced introduction of moist, hot air into the PM hall subsequently improved the climatic conditions in the hall and created the foundations for additional optimisation. Lower noise emissions to the outside improve the noise protection situation for the production location.