On-line chemical analysis of pulp and calcination processes
|Coordinator||RISE Acreo AB - Rise Acreo AB, Kista|
|Funding from Vinnova||SEK 399 985|
|Project duration||October 2017 - March 2018|
|Venture||Strategic innovation programme for process industrial IT and automation – PiiA|
Purpose and goal
The purpose of this feasibility study was to, through lab and field tests, investigate the possibilities of the LIBS-technique to continuously detect undesirable metal elements in two mass processes (dissolving pulp and lime mud). Further, the usability and benefit of the LIBS-technique for the two processes were investigated. A plan for a coming RoD-project was written that aims toward an industrial implementation of the LIBS-technique.
Expected results and effects
The LIBS-technique was able to detect the undesired elements in the material in the processes. As the number of samples were few, the accuracy in element quantity could not be estimated. Nevertheless, the conclusion is that the LIBS-technique can be used for on-line detection of undesirable elements in dissolving mass and mesa and provide information to control the production process. This process control will open possibilities for improved quality and a more stable process with less downtime.
Planned approach and implementation
Initially the quantities of the different undesirable elements were compiled for the two processes (dissolving pulp and mesa). Then lab measurements were made on collected samples from the two processes, and field measurements were made on the lime mud filter at Mörrums Bruk. The usability and benefit of the LIBS-technique were analysed and summarized. Finally, a plan for a coming RoD-project was written.