Valmet supports Guizhou Taison in achieving further improvements and breakthroughs in TwinRoll Press and screening systems
As one of the pioneers in bamboo chemical pulp production in China, Taison (Guizhou) Bamboo Resources Development Co., Ltd. (hereinafter referred to as “Guizhou Taison”) has continuously invested in technological upgrades to overcome production capacity bottlenecks.
Its cooking production line has steadily grown from an initial annual output of 200,000 tons to more than 360,000 tons today, consistently setting new production milestones. These ongoing capacity increases have ensured Guizhou Taison’s competitiveness. At the same time, its strong focus on key equipment, along with proactive maintenance and upgrades, has laid the foundation for ongoing advancements and breakthroughs in its bamboo chemical pulp line.
In the fiber line, the TwinRoll Press serves as a key piece of equipment for washing and dewatering. Its washing efficiency directly affects pulp output as well as overall chemical consumption and energy use. Meanwhile, pressure screens play a crucial role in pulp cleaning and screening, effectively separating impurities from qualified fibers and improving pulp uniformity and cleanliness, thereby ensuring the quality and efficiency of downstream papermaking.
Recently, to achieve further improvements and breakthroughs in washing and screening, the Valmet team successfully tailored and implemented an upgrade solution for the TwinRoll press pulp inlet system and the screening system.
Valmet’s efficient and professional service receives high praise from the customer
Valmet demonstrated strong professional expertise and a high sense of responsibility, providing solid support for the successful advancement of this upgrade project. The team’s technical competence, as well as efficient communication and collaboration, were key factors in enabling rapid project implementation. After the upgrade, the TwinRoll Press has operated with excellent stability, with significantly reduced equipment load, while also delivering tangible savings in energy consumption.
Valmet has a highly collaborative and efficient expert team that can develop tailored optimization and upgrade solutions based on actual mill operating conditions. In this project, Valmet worked closely with Guizhou Taison to significantly improve washing efficiency, screening capacity, and overall system stability by upgrading to the Valmet ProFlow feed distribution and new screen rotor. We appreciate the joint efforts of both teams during the preparation and execution phases and look forward to closer cooperation and more successful projects in the future.
Upgrade of the TwinRoll Press with Valmet ProFlow
Evaluation of operating data and an on-site audit revealed that the two TRPB-940 presses were limiting the increase in capacity. To overcome this limitation, Valmet provided a new inlet ProFlow upgrade solution.
The latest-generation ProFlow inlet for the TwinRoll Press offers key advantages through its optimized design, ensuring a highly uniform cross-machine distribution of pulp before entering the pressing zone. This results in three major benefits:
- Improved washing efficiency
- Operating at higher inlet consistency and more stable outlet consistency
- Enhanced operational stability and reduced energy consumption
Upgrade of the screening system
Guizhou Taison’s current first-stage accepted pulp capacity is 853 adt/d, with a target to increase it to 980 adt/d.
To achieve this goal, the Valmet technical team quickly mobilized on-site, conducted detailed inspections and precise analyses, identified the key bottlenecks limiting production capacity, and developed targeted upgrade solutions.
On-site analysis and inspection showed that the existing screening system had become a bottleneck. Based on these findings, Valmet proposed the following upgrade measures:
- Removal of the original knot screen
- Upgrade of the fine screen rotor
- Replacement with new slotted screen baskets
- Conversion of the upgraded screen to operate as a first-stage screen
- Addition of one K10 knotter to match the increased capacity requirements
Valmet has a flexible product portfolio and can tailor-make solutions to customer needs to remove bottlenecks and increase performance.
