Mitsubishi Paper Mills, PM7 in Hachinohe mill, Japan
![](https://www.wetend.com/wp-content/uploads/2023/09/Hachinohe.png)
“A great reduction in production costs and increase in productivity”
Paper machine
- Grades: Base paper, fine paper, book paper, LWC paper
- Speed: 1,300m/min
- Production: 13,000 t/month
- Wire width: 5,800 mm
Challenges
After switching to a dual polymer retention system and ECF pulp, first pass retention decreased and the consumption of retention aids increased. This called for a new chemical mixing system to:
- reduce the consumption of retention aids
- improve the first pass retention
- prevent the collection of scale and dirt
- prevent sheet formation problems
Our solutions
- TrumpJet Flash Mixing stations for retention aid polymers (A-PAM and C-PAM).
- Moving A-PAM mixing location after the screen
Results
![an icon for chemical savings](https://www.wetend.com/wp-content/uploads/2023/11/image.png)
40% retention aid savings
![](https://www.wetend.com/wp-content/uploads/2023/10/Nayttokuva-2023-10-04-115450-1.png)
90 m3/day fresh water savings
(reduction of dilution water for A-PAM line)
![](https://www.wetend.com/wp-content/uploads/2023/09/icons-energy-Copyv-2-3.png)
2,540 kWh/day energy savings
(to heat fresh water from 11.8°C to 37°C)
![](https://www.wetend.com/wp-content/uploads/2023/09/cogs-Copy-1.png)
3.5% production increase
8% total first pass retention increase
12% ash first pass retention increase
![](https://www.wetend.com/wp-content/uploads/2023/09/icons-tools-Copy.png)
33% prolonged lifetime of felt and wire
33% extended shut down cycle
(30 days → 40 days )
![A diagram showing that dosing rates of retention aids: after the installation of TrumpJet Flash Mixing, the consumption of retention aids reduced by 39%](https://www.wetend.com/wp-content/uploads/2023/09/charts-Copy.png)
![A diagram showing FPR rates for various grades before after the installation of TrumpJet Flash Mixing. With TrumpJet, FPR increased by 8% on average.](https://www.wetend.com/wp-content/uploads/2023/09/charts.png)
Conclusion
Due to success of the first TrumpJet® injection mixing installation and the potential to decrease chemical consumption even more, a decision was made for a “step two” of the project: injection mixing of C-PAM + AKD after the screen with TrumpJet Chord.
The great reduction in production cost and 3.5% increase in productivity lead to new repeat orders for the other lines.
![A layout drawing showing that 3](https://www.wetend.com/wp-content/uploads/2023/10/hachinohe-step-two-aed9d7.png)
Considering chemical mixing optimization?
We can help you to lower production costs, improve machine runnability and product quality, while reducing the environmental impact of your production, and much more.