(PDF) Design equation for paper machine press sections
Water removal in the press section of paper board, and pulp machines has an important influence on machine efficiency and cost. A press section design equation, based on the decreasing ...
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OPTIMIZATION FOR ENERGY CONSUMPTION IN DRYING .
flow rate in drying section. The m˙ sc s,AH and m˙ s,AH are the mass flow of steam inside the cylinders and the steam consumed in the heat recovery heat exchanger, respectively. The m˙ p,o is the paper machine throughput. The object of the optimization was to minimize the steam consumption in the whole drying section of the paper machine.
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Papermaking - Formation of paper sheet by machines ...
Papermaking - Papermaking - Formation of paper sheet by machines: In a paper machine, interrelated mechanisms operating in unison receive paper stock from the beater, form it into a sheet of the desired weight by filtration, press and consolidate the sheet with removal of excess water, dry the remaining water by evaporation, and wind the traveling sheet into reels of paper.
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Paper Machine System Diagram - TMEIC
Forming Section A typical flat former is a continuous rotating wire (today this is plastic) mesh that removes water from the paper by sucking it out of suspension. Multi-layer paper machines and paper board machines include additional forming sections (one forming section for each layer of paper). Forming section drives have a high
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The Pulp and Paper Making Processes
machine. Before entering the paper machine, water is added to the pulp slurry to make a thin mixture normally containing less than 1 percent fiber. The dilute slurry is then cleaned in cyclone cleaners and screened in centrifugal screens before being fed into the ''wet end* of the paper-forming machine. In the paper making process, the ...
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PAPERMAKING - PAPTAC
Forming is the first step in the papermaking process. Its specific objective is to drain water from a dilute fiber suspension on a forming fabric, and to create a uniform fiber mat that is strong enough to be passed to the press section of the paper machine. Forming has a strong influence on a range of paper properties.
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Papermaking. - Free Online Library
Jan 01, 2004· Drying - Papermaking Part 2 Edited by Markku Karlsson Papermaking Part 2, Drying is volume 9 in the Papermaking Science and Technology Series, published by the Finnish Paper Engineers' Association and TAPPI. This comprehensive textbook presents an overview of the design and operations of the dryer section of a modern paper machine.
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Papermaking Science and Technology Book Series
Volume 9 Papermaking Part 2, Drying Book editor: Markku Karlsson, D.Sc. (Tech.), Senior Vice President, Technology, UPM. This book presents an overview of the design and operations of the drying section of a modern paper machine. It covers drying of the paper web, runnability in the paper machine drying section, drying quality, drying ...
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Pulp and Paper Manufacturing Process in the paper industry
Papermaking Procedure. Bleached or unbleached pulp may be further refined to cut the fibers and roughen the surface of the fibers to enhance formation and bonding of the fibers as they enter the paper machine. Water is added to the pulp slurry to make a thin mixture normally containing less .
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Improvement of wet and dry web properties in papermaking ...
Aug 12, 2013· the runnability of the paper machine occur during the wet pressing and/or in the beginning of dryer section when the dry content of the paper is in the range 30-70%. Web tension is created by a speed difference in the web transfer between the press and dryer section. The web tension is not
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Steam & Condensate System Improvements
Aug 17, 2012· All pulp, paper, board and the majority of tissue machines have steam and condensate systems. The objective of the steam and condensate system in the paper machine is to provide the steam for the drying. In the dryer section the moisture is evaporated as the sheet is pressed between a fabric and the hot drying cylinder.
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Polymers used in papermaking industry process
3.2.2 Introduction about dryer section The paper drying process is one of the few papermaking operations, which have re-mained relatively unchanged since the invention of the paper machine. The drying sec-tion consumes the most energy among papermaking operations and it is the longest part
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Paper machine drying | Valmet
The task for the dryer section is to remove water from the paper web by evaporation. Typical methods for paper or board drying are multi-cylinder drying or air drying. Regardless of the selected drying method, it is vital to ensure maximum drying efficiency with minimum energy consumption.
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PAPER MACHINE HOOD TROUBLESHOOTING GUIDE
quested we conduct a Drying Performance audit of his Yankee Hood. (Continued on p.2) PROPER DESIGN AND OPERATION OF YANKEE HOODS REDUCE ROUTINE MAINTENANCE The Yankee hood is an important tool in the drying of tissue, towel and specialty paper grades. The physical condition of its compo-nents has an important bearing on the machine's
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