Hannu U Ronkonharju

Title: Hannu U Ronkonharju: Innovator in Fiber Suspension Treatment

Introduction

Hannu U Ronkonharju is a notable inventor based in Kyminlinna, Finland. He has made significant contributions to the pulp and paper industry, particularly in the treatment of fiber suspensions. With a total of 3 patents, his work focuses on improving processes that enhance the efficiency of pulp treatment.

Latest Patents

Ronkonharju's latest patents include innovative methods and arrangements for the treatment of fiber suspensions. One of his patents describes an apparatus and method for screening pulp after bleaching. This apparatus features a first bleaching tower for bleaching pulp, along with a screener that separates the bleached pulp into a first accept fraction and a first reject fraction. The first accept fraction is then supplied to a post-screening treatment device without the need for further treatment by a separate thickener. Additionally, the apparatus includes a vortex cleaner that separates the first reject fraction into a second accept fraction and a second reject fraction, allowing for efficient processing without a separate thickening stage.

Another patent focuses on a method and apparatus for treating fiber suspensions specifically during the bleaching stage. This method involves diluting the pulp discharged from the bleaching stage to the screening consistency, screening it in a pressure screen, and supplying the accept fraction to the subsequent treatment stage without a separate thickening stage. The screening is preferably conducted using a narrow-slot screen, which enhances the overall efficiency of the process.

Career Highlights

Hannu U Ronkonharju is associated with A. Ahlstrom Corporation, where he applies his expertise in fiber suspension treatment. His innovative approaches have contributed to advancements in the pulp and paper industry, making processes more efficient and effective.

Collaborations

Ronkonharju has collaborated with notable colleagues such as Olavi E Pikka and Kaj Henricson. Their combined efforts have furthered the development of innovative solutions in the field.

Conclusion

Hannu U Ronkonharju is a distinguished inventor whose work in fiber suspension treatment has made a significant impact on the pulp and paper industry. His innovative patents and collaborations highlight his commitment to advancing technology in this field.