Clarifying Tanks Holding You Back?

Clarifiers are an important part of the pulping process but they have a key drawback, production capacity is based on rise rate through the cross-sectional area. Once the clarifier tank is built, the cross-sectional area cannot change and a production increase will result in an increased rise rate.

Settling aids like polymers are then needed to improve settling rates of particles to offset increased rise rates. Filters can also address some of the clarifier’s drawbacks, but they come at a higher capital cost. Now there is a cutting-edge clarifier technology that can be retrofitted into existing units, resulting in improved capacity and clarity of overflow.

This fall, Robert Carlstrom of Valmet Paper AB will present Green Liquor Clarification Improvement Utilizing Existing Tank and Vessel in Mills at TAPPI’s 2022 Pulping, Engineering, Environmental, Recycling and Sustainability (PEERS) Conference. As part of PEERS’ Energy, Recovery, Lime Kiln and Recaust (ERLR) track, Carlstrom’s presentation will discuss how this new technology improves internal flow patterns, reduces overflow turbity, and increases capacity of the existing unit. Attendees will also hear about cases where production capacity has increased as much as 25-30%, providing a significant financial benefit to mills.

PEERS’ ERLR track offers both fundamental and practical knowledge on key process areas in mills, including evaporators, recovery boiler, recaust plant, lime kiln and energy generation. Topics are focused on maximizing the efficiency and throughput of the recovery cycle. Participants can also attend a Lime Kiln panel discussion with industry experts. Track sessions include:

  • Plant Design
  • Lime Kiln Operation & Hardware
  • Online Analysis & Energy Recovery
  • Lime Kiln Chemistry
  • Black Liquor Properties & Combustion
  • Impact of Chemistry on Boiler Operation

Learn more about ERLR track presentations and speakers

PEERS 2022
PEERS, October 30 – November 2, 2022 in Providence, R.I., is considered the premier technical event focusing on the latest advances in technology, as well as fundamental process knowledge and control issues mills face each day. Its comprehensive technical program emphasizes new methods and best practices to help mills optimize operations and reach their sustainability goals. In addition to ERLR, program tracks include: Engineering, Reliability, Corrosion & Materials (ERCM); Environmental; Pulping and Bleaching; Recycling; Sustainability; and Nonwood.

With the theme, The Future of Pulp & Paper in a Changing World, PEERS provides mills and other professionals the opportunity to learn from industry experts in a presentation setting, as well as engage in peer-to-peer discussions during panel sessions and committee meetings. The Conference also offers multiple networking events, a New Technology Showcase, and an exhibit floor where attendees can speak with suppliers about the latest technologies and solutions.

View the full program

PEERS 2022 is co-located with the International Bioenergy & Bioproducts Conference (IBBC). Attendees can attend both technical programs for only one registration fee. Mills receive special discount pricing.

To register or for more information, visit