In the papermaking process, efficient dewatering is crucial for energy efficiency, cost-effectiveness, and the overall quality of the final product.
A key component in achieving this efficiency is the optimization of vacuum systems, specifically within the press section of the paper machine.
Importance of Dewatering
The press section is where most of the water used in the papermaking process is removed from the paper web. Efficient dewatering in the press section directly translates to energy savings in the dryer section, as a drier web requires less energy to achieve the desired final dryness. This relationship between press section dewatering and dryer section energy consumption highlights the significant impact vacuum systems can have on the overall cost-efficiency of a paper mill.
How Vacuum Systems Enhance Dewatering
Nip Dewatering:The most effective method for water removal in the press section is nip dewatering. This process involves passing the paper web through a series of nips formed by press rolls.
Save-alls:These components are essential for collecting the water removed during the dewatering process and preventing it from being reabsorbed back into the paper web. Well-designed save-alls, working in conjunction with efficient vacuum systems, are capable of managing 100% nip dewatering without rewetting.
Doctoring Systems:Doctoring systems work in conjunction with vacuum systems to further enhance dewatering and ensure a clean paper web. These systems typically involve using blades to remove water, debris, and fibers from the surface of the rolls, which helps maintain the efficiency of the dewatering process.
Benefits of Optimized Vacuum Systems
Optimizing vacuum systems in paper mills offers several benefits, including:
- Energy Efficiency:Improved dewatering reduces the load on the dryer section, leading to significant energy savings.
- Cost Savings:Reduced energy consumption translates directly into cost savings for the mill.
- Increased Production Capacity:Efficient dewatering can lead to increased machine speed and overall production capacity.
- Improved Product Quality:Optimized dewatering contributes to better moisture profiles and a more consistent final product.
RunDry: A Tailored Solution
Runtech offers a comprehensive solution called RunDry, which is designed to optimize dewatering and enhance paper machine efficiency. RunDry combines:
- Save-alls
- Doctoring systems (including blade holders, carbon fiber doctor beams, double doctors, and AirBlades)
- Forming and dryer section cleaning systems
- EcoFlow dewatering measurement system
By integrating these components, RunDry addresses multiple aspects of the dewatering process, leading to a more efficient and cost-effective operation. Furthermore, RunDry solutions typically provide a return on investment in six months, demonstrating their cost-effectiveness for paper mills.
Read more about dewatering and energy savings on our web site:https://www.runtechsystems.com/en-fi/about-us/brochures/dewatering-and-energy-savings