U.S printing and specialties paper mill gains an ROI of $250,000/yr using DuPulse and Nexus technologies
A mill producing Kraft specialty printing and pressure sensitive grades was experiencing poor press stability during on-the-fly felt washing. The competitive program provided insufficient cleaning and resulted in poor press felt dewatering performance.
As a result of deposit accumulation on the center press roll cover, poor sheet release was experienced. This ultimately led to roll-wrapping on the center roll which resulted in more than $250,000 in production losses and damage to the press & doctor assembly.
The mill was interested in a new felt cleaning program that would improve felt cleaning efficacy, improve press stability while cleaning and provide improved safety around the press section.
All of this was to be achieved at no cost increase from the previous program budget.
The DuBois Solution
After conducting a press section survey, water balance studies, press felt residual sample analytics and felt permeability studies, DuBois implemented new strategies for press felt cleaning and roll treatment.
DuBois implemented their patented DuPulse method of felt cleaning. DuPulse is a unique felt cleaning application method, which utilizes the high pressure, oscillating needle showers to deliver cleaning chemistries on a “pulsed” basis.
The cleaning program was coupled with a DuTrak program monitoring system.
The DuTrak system provides on-line, real-time monitoring of press & Uhle box filtrate characteristics / chemistry, so that the impact of cleaning events can be measured & optimized.
Center roll treatment was provided by patented Nexus technology applied to the roll surface via the doctor lubrication fan showers. The Nexus treatment chemistry provides for both cleaning of the roll and formation of a hydrodynamic film on the roll surface to prevent deposit formation and improve sheet release performance uniformity.
Results and Benefits
The overall program yielded the following impressive results:
Press section safety was improved by reducing chemical concentration in the shower by 88%.
Trade Expo / 12.15.22
DuBois Chemicals will be exhibiting at TAPPICON in Atlanta, GA at the Cobb Galleria April 22-26, 2023
Recent Events / 10.02.18
The acquisition of the Water Treatment Solutions division of Triwater Holdings LLC, and its Klenzoid, Eldon Water, Chemco Products and Nashville Chemical brands, expands DuBois position in Canada and enhances our solutions for the institutional, light industrial, food and beverage and natural resources markets.
Recent Events / 06.18.18
IPAC Holdings (Innovative People Advancing Chemistry) joins DuBois. IPAC and Power Chemicals supports the needs of customers in the hard rock mining, coal, primary metals, bulk terminal, pulp and paper and water treatment markets.
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