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Language: English Polish Russian
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Paper Machine Auxiliary Systems Series (Details)Includes 8 courses for $299/year. Paper Library (Details)Includes 92 courses for $1,499/year.
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Training Time: 11 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Polish, Russian
Steam is commonly used in industrial environments for power generation and in heating and drying applications. On a paper or board machine, steam is used to dry the sheet of paper or board to a target moisture content before it is wound up on large rolls that can be transported, stored, or shipped. Before one can understand how steam is used in heating and drying applications, like paper machine drying systems, it is important to understand how steam is created, how heat energy is transferred from the steam to the sheet, and the relationship between steam pressure and steam temperature.
Dryer Felt Design
View Course
Dryer Felt System Operations
Paper Machine Winding Basics
Pulping and Papermaking Overview
Steam Theory for Tissue Machines
The following key questions are answered in this module:
Why does water boil at lower temperatures at higher elevations?The phase of water (solid, liquid, or gas) is determined by its temperature and pressure. Atmospheric pressures are lower at higher elevations, and liquid water boils at lower temperatures at lower pressures.
What is condensate?When water molecules in steam contact a cool surface, they lose energy to that surface and change into a liquid. The resulting liquid water is called "condensate."
What is superheated steam?Superheated steam is steam that has been heated above its boiling point for the current pressure
How can superheated steam cause problems with the rotary joints on dryer cans?The moisture in saturated steam lubricates the carbon rings in the rotary joints. Without this lubrication, the rings will wear more rapidly and could even crack if they get too hot.
Why is it important to collect and reuse the condensate from a paper or board machine?The condensate still contains heat, which is valuable because it lowers the amount of heat needed to produce additional steam.
Below is a transcript of the video sample provided for this module:
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