Domtar‘s packaging mill in Kingsport, Tenn., delivers containerboard products. By partnering with Maintech and implementing its Dryer Section Passivation (DSP) technology, the mill has recently elevated its performance to set a new benchmark for reliability, efficiency and customer satisfaction.
While its products were already outperforming market benchmarks, the mill identified opportunities to further optimize machine efficiency and reliability. By way of example, sheet breaks in the dryer section, caused by sticky deposits, were negatively affecting machine uptime and winder productivity.
Photos courtesy Maintech.
Maintech’s DSP technology, comprising chemical products, spray equipment and application methods, prevents deposition on dryer cans, fabrics, fabric rolls and calender rolls, addressing issues that can compromise machine performance. The passivation application results in the mitigation of ‘stickies’ deposition on paper machines.
DSP effect on dryer fabrics in containerboard machine. Photos courtesy Maintech.
Key features of DSP technology including preventing deposits on dryer section components, reducing sheet breaks and the need for manual cleaning and improving winder throughput and machine reliability.
Dryer can treated with DSP. Photo courtesy Maintech.
Domtar Kingsport conducted a DSP evaluation for a machine that produces 600,000 tons per year of recycled liner and corrugated medium paper grade, operating at 1,900 to 4,500 ft per minute. Key benefits were achieved, as the technology eliminated manual cleanings of the first dryer doctor blade, reduced deposition related to dryer can and felt-related sheet breaks by 40% and improved operational efficiency.
DSP application. Diagram courtesy Maintech.
Two DSP applications were installed after a dryer section audit was conducted. Each treated surface improved dramatically, sheet breaks were reduced and frequent cleaning of the doctor blades and dryer felts was no longer needed. Increased machine speed boosted production, while reductions in steam consumption lowered energy costs. Safety was also improved.
DSP sticky removal. Photos courtesy Maintech.
“Maintech has played a pivotal role in enhancing our operational efficiency,” says Shivamurthy Modgi, operations manager for Domtar Kingsport. “Their solutions have enabled us to streamline processes, reduce downtime and achieve more consistent output, ultimately contributing to increased productivity & customer satisfaction.”
Takanori Tsuji is president and CEO of Maintech USA, which provides chemical products, spray equipment, maintenance and technical services. For more information, contact tsuji@maintech-usa.com or Robert Deshaies at 301-697-3985 and visit www.maintech-papertech.com.
