Pressure filters are used extensively in the papermaking process and often go unnoticed as they effortlessly operate in stable mill water systems. They quietly perform as designed preventing shower nozzles from plugging and assuring that paper machine clothing remains clean. Pressure filters protect process equipment by removing contaminants such as sand and silt from mill water.
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Written by Dave McGowan
on December 16, 2014.
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.
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Written by Mike Sneary
on October 28, 2014.
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:
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Written by Greg Wedel
on September 16, 2014.
Recycled fiber provides many benefits to our environment. It can also have an adverse effect on a papermaker’s energy efficiency and production goals.
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Written by Dave Behrens
on July 29, 2014.
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.
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Written by Jerry Timm
on July 09, 2014.
