Strategies to minimize fouling in black liquor evaporators

Black liquor is an important by-product of the pulping process, containing large amounts of cooking chemicals and energy that needs to be recovered. The first step in this process is to increase the concentration of the black liquor in the evaporation plant, which is the single most energy consuming unit at the mill. The evaporation plant is known to have problems with fouling which drastically reduces the capacity and the plant's energy efficiency. Fouling leads to a need for regular cleaning, it can cause major disturbance and, at worst, production loss for the whole mill.

By a combination of case studies and studies in pilot scale, the project aims to develop new strategies for industrial black liquor evaporators to minimize fouling and thus increase energy efficiency in the mills, as well as to reduce the frequency of major problems. The project will be a close collaboration with both an equipment supplier and pulp mills, and links to earlier research at Chalmers in the field.

Participants

Mathias Gourdon (contact)

Forskare vid Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Forest Products and Chemical Engineering

Lennart Vamling

Professor vid Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Forest Products and Chemical Engineering

Funding

Stora Enso AB

Funding Chalmers participation during 2016–2020 with 435,000.00 SEK

Södra

Funding Chalmers participation during 2016–2020 with 435,000.00 SEK

Valmet Power AB

Funding Chalmers participation during 2016–2020 with 1,086,000.00 SEK

Swedish Energy Agency

Funding Chalmers participation during 2016–2020 with 2,391,000.00 SEK

Related Areas of Advance and Infrastructure

Sustainable development

Driving Forces

Energy

Areas of Advance

More information

Latest update

2018-04-24