The Kadant Blog

Optimization


Steam, Paper Drying, and the Bottom Line

Because energy drives the papermaking process, steam is found in many energy streams in a paper mill. Steam is used to cook fibers for improved sheet strength, heat stock for improved drainage, heat process air for ventilation, heat dryers to dry paper, and selectively heat the web for improved gloss and smoothness.

Read more

Nanotechnology Enhanced Doctor Blades Meet the Challenge

Nanotechnology, as it applies to doctor blades, is a microscopic filler material that is used to enhance the doctor blade performance. It’s added to resin to make the blade denser with higher peel strength and improved chip resistance. This stands out from a typical composite blade and allows for better wear resistance and roll cleaning.

Read more

Doctoring Suction Pressure Rolls on Tissue Machines

A suction pressure roll double doctor blade system is specially designed for dewatering suction pressure rolls in tissue making applications. The system is comprised of a specially designed holder in primary position that augments the natural vacuum created behind the blade tip to expel more water from the roll surface.

Read more

Steam Hammer in Continuous Casting of Steel

Continuous casting of steel is the process where molten steel is solidified into a semi-finished billet, bloom, or slab for subsequent rolling in the finishing mills. Effective water cooling of continuous casting rolls is critical. Any drop in water pressure, even from a leaking hose, can result in reduced water flow causing water to remain in the rolls longer than recommended.

Read more

Pressure Powered Pump Alternative Reduces Maintenance

There are thousands of electric centrifugal pumps in service used to pump condensate. These pumps are either simplex or duplex condensate pump units and operated with a mechanical float switch assembly.

Read more

Paper Dryer Fabric Tension Impacts Dryer Performance

Dryer fabrics, often called dryer “felts”, are used to hold paper against the outer surfaces of steam-heated drying cylinders. The pressure from the dryer fabrics increases the rate of heat transfer from the dryer to the paper. The pressure that is applied to the paper depends on the fabric tension and the diameter of the dryer. The pressure can be calculated, as a first approximation, by the equation:

Read more

Why is Checking the Doctor Blade Angle Important?

Doctor blades are used to clean rolls and remove stock accumulations, water, pitch, and filler buildup. Since paper, tissue, chemical, food, beverage, corrugating, construction, metals, textiles and nonwovens, it is important to make sure each doctor blade angle is set appropriately for the job to be accomplished.

Read more

Dryer Syphons

It has been well-documented that the distance between the condensate entrance of a syphon and the dryer shell, referred to as the syphon clearance, has considerable influence on the operational efficiency of a paper dryer. Suboptimal clearance adversely affects heat transfer capacity and the cross-machine temperature uniformity of the cylinder.

Read more
© Kadant Inc.

Privacy  |  Terms