TAPPI TIP 0404-07

TAPPI - TAPPI

Paper machine drying rate

Organization:

Year: 2010

Abstract: This TIP outlines procedures for calculating paper machine drying rates for coated and uncoated papers and provides drying rate curves. The objective of the TIP is to define rate of water removal on a common basis for mills to use to compare a particular machine to past performance and to other machines. The definition of drying rate and its calculation are simple to permit widespread use. These procedures cannot be used for machines with auxiliary drying equipment such as infrared dryers and impingement dryers unless these auxiliary dryers are shut off.
Data points on the curves represent observed performance of existing machines. Lines represent calculated average and two-sigma variation of plotted data.
The calculation does not identify or account for factors that affect drying rate. There are many variables that can affect calculated drying rate.These factors include:
• Sheet furnish
• Siphon design
• Use of dryer bars
• Pocket ventilation
• Dryer fabric application
• Dryer configuration
•Dryer felting
•Dryer surface scale
• Hood humidity
• Reel moisture content
• Type of pressing
• Amount of pressing
• Breaker stack

URI: http://yse.yabesh.ir/std;quessioutho4/handle/yse/95114

Subject: After dryers

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TAPPI - TAPPI

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contributor author	TAPPI - TAPPI
date accessioned	2017-09-04T16:31:41Z
date available	2017-09-04T16:31:41Z
date copyright	01/01/2010
date issued	2010
identifier other	UPKIRCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;quessioutho4/handle/yse/95114
description abstract	This TIP outlines procedures for calculating paper machine drying rates for coated and uncoated papers and provides drying rate curves. The objective of the TIP is to define rate of water removal on a common basis for mills to use to compare a particular machine to past performance and to other machines. The definition of drying rate and its calculation are simple to permit widespread use. These procedures cannot be used for machines with auxiliary drying equipment such as infrared dryers and impingement dryers unless these auxiliary dryers are shut off. Data points on the curves represent observed performance of existing machines. Lines represent calculated average and two-sigma variation of plotted data. The calculation does not identify or account for factors that affect drying rate. There are many variables that can affect calculated drying rate.These factors include: • Sheet furnish • Siphon design • Use of dryer bars • Pocket ventilation • Dryer fabric application • Dryer configuration •Dryer felting •Dryer surface scale • Hood humidity • Reel moisture content • Type of pressing • Amount of pressing • Breaker stack
language	English
title	TAPPI TIP 0404-07	num
title	Paper machine drying rate	en
type	standard
page	21
status	Active
tree	TAPPI - TAPPI:;2010
contenttype	fulltext
subject keywords	After dryers
subject keywords	Bags
subject keywords	Bleached board
subject keywords	Computation
subject keywords	Corrugating medium
subject keywords	Dryers
subject keywords	Drying
subject keywords	Fine papers
subject keywords	Free sheet
subject keywords	Kraft papers
subject keywords	Linerboard
subject keywords	Mechanical papers
subject keywords	Newsprint
subject keywords	Printing papers
subject keywords	Pulps
subject keywords	Water removal
subject keywords	Wood free papers
subject keywords	Writing papers