Sami paper machine improvements - SlideShare

Jun 21, 2016· Sami paper machine improvements 1. Paper Machine Improvements 1° Seminario Latino Americano de Tecnología Valmet 2016 Sami Hartikainen Senior Product Sales Manager

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China Dryer Cylinder for Paper Machine - China Dryer ...

Dryer, Paper Machine, Paper Machine Cylinder manufacturer / supplier in China, offering Dryer Cylinder for Paper Machine, Toilet Paper Roll/Industrial Maxi Roll Band Saw Cutter Metal Blade Sk51, 6 Lanes Tissue Facial Paper Making Machine and so on.

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(PDF) 35 Drying of Pulp and Paper - ResearchGate

The rst practical paper machine was produced in the early 1800s; then continuous drying techniques were introduced to the industry by means of cylinder drying in 1817 by John Dickinson; later, in ...

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Valmet Yankee dryer solutions

hybrid technologies and Thru-Air drying machines. They are also the perfect choice as a standalone replacement for upgrading safety and reliability, increasing capacity or optimizing energy consumption of existing paper machines. For added benefits, you can combine them in an optimized package with Valmet's Advantage ViscoNip press or

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Drying concepts | Voith

The heat transfer in the drying cylinder is improved and drying performance increased. Mini-ThermoBars for the edge area of the cylinder prevent moist streaks at the edge of the paper web. Starting at a production speed of about 500 m/min, the condensate forms a laminar ring in the drying cylinder, which reduces the relative heat transfer of ...

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US6398916B1 - Simplified through-air drying paper making ...

A through-air drying paper making apparatus is provided comprising a twin-fabric forming section, a water-removing section arranged downstream of the forming section, and a web transfer device disposed between the forming section and the water-removing section. The forming section includes a forming roll, a pair of fabrics guided to travel about a portion of the circumference of the forming ...

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Through Air Drying (TAD) tissue making technology | The ...

Sep 28, 2017· As the residence time on a typical 16-foot TAD cylinder is less than one second, extremely high drying rates are required, and the TAD system must be designed to provide this high drying rate. Figure 2 shows a schematic of the air flow around the TAD cylinder and hood. Figure 2. Through-air drying process flow sheet. 6. TAD Cylinder, Hood and ...

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Fundamentals of Paper Drying Theory and Application from ...

2. Fundamentals of paper drying Contact drying with steam heated cylinders is the predominant method of drying in paper and paperboard machines. Besides conductive heat transfer between hot cylinder surface and the wet web, the role of air that is eith er the drying medium or surrounds the drying atmosphere is very significant. Paper drying is ...

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US6101735A - Dryer section in a paper machine in which ...

Valmet Paper Machinery, Inc. Drying module and dryer sections that make use of same, in particular for a high-speed paper machine US5539999A (en) * 1994-03-02: 1996-07-30: Valmet Corporation: Dryer section of a paper machine with selected diameter drying cylinders at selected distances apart US5553393A (en) * 1994-03-25

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Optimizing the energy efficiency of conventional multi ...

The paper machine drying section and its operating principal have remained almost unchanged since their initial development; contact drying with steam heated cylinders is still the dominant method for drying paper and board [5]. Attempts to develop new drying techniques with reduced energy intensity in the paper industry are, however, known.

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US3089252A - Web moisture profile control for paper ...

US3089252A US808237A US80823759A US3089252A US 3089252 A US3089252 A US 3089252A US 808237 A US808237 A US 808237A US 80823759 A US80823759 A US 80823759A US 3089252 A US3089252 A US 3089252A Authority US United States Prior art keywords drying web air hood means Prior art date 1959-04-22 Legal status (The legal status is an assumption and is not a legal conclusion.

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Paper Machine Drying - YouTube

Jul 27, 2015· Visit https://goo.gl/laH7LD to view the full video and purchase access to our other Paper courses. On conventional paper and board machines, the energy requi...

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US5544422A - Drying section - Google Patents

Drying section. A drying section of a papermaking machine, is comprised of several drying groups, wherein the last drying cylinder of one drying group is arranged a short distance from the first drying cylinder of the following drying group and wherein the paper web extends directly from the last drying cylinder to the first drying cylinder, thereby permitting quick transfer of the paper web ...

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Valmet dryer cylinders

for any machine size and speed. For high drying efficiency ... with certain paper and board grades. Valmet can offer a variety of cylinder covers for these positions. Valmet's Valmet Dryer Roll Cover ... Valmet Dryer Cylinder Bars are U-proled low-carbon steel bars that are xed to the inside surface of the

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US4625430A - Drying section and method in paper machine ...

A multi-cylinder drying section and method in a paper machine wherein the paper web to be dried is guided into contact with the surfaces of heated drying cylinders wherein the drying fabric is cooled as it travels from one drying cylinder to the next. According to one embodiment, preferably used in the first group or groups of drying cylinders, a single-fabric draw is used wherein the web is ...

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WOVEXX - Press Felts | Dryer Fabrics | Paper Machine Clothing

WOVEXX supplies paper machine clothing to the pulp and paper industry. We are committed to help paper makers improve the formation, dewatering, pressing and drying of paper sheets. We build up valuable experience and reputation in the manufacture of .

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VALMET PAPER MACHINE DRYER SECTION - 50 DRYERS VALMET ...

PAPER MACHINE DRYER ROLL - VALMET DRYER FACE: 374" - (9500mm)DRYER DIA: 70" - (1800mm)MAX OPERATING PRESSURE 72 PSI (5bar)COMPLETE SECTION, 50 DRYERS INCLUDING 14 VACROLLS DRYER (SLALOM RUN) FACE OVERALL LENGTH: 383" - (9745mm)SHELL WIDTH : 374" - (9500mm)ROPE NECK: 6" (155mm)BREAKER STACK AFTER CYLINDER 45VALMET SYM-S ROLL .

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Method and apparatus for drying webs - Valmet Paper ...

Nov 17, 1992· A method for use in web drying apparatus, such as a drying section of a coating or paper machine which includes drying cylinders against the outer mantles of which a web to be dried is pressed in direct contact, and wherein the web is carried from one drying cylinder to the next supported on a wire which passes from a drying cylinder over an intermediate leading cyclinder where the web is ...

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Paper Machine Design and Operation--Descriptions and ...

Cost of Paper Machine Clothing 140 5.18 Vacuum Pumps 140 Water-Ring Vacuum Pump 140 Water-Ring Pump Heat Recovery 141 Turbo Compressor 142 5.19 Pressi ng and Paper Quality 143 Shadow Marking 143 5.20 Future Development of Pressing 143 References 147 CHAPTER 6 – DRYING OF PAPER 6.1 Cylinder Drying 149 Heat Transfer Considerations 149

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Paper machine drying rate, Technical Information Paper TIP ...

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.

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US5279050A - Grouping of cylinders in the drying section ...

The invention relates to a grouping of cylinders in a drying section of a paper machine, in which drying section a paper web and a wire are carried meandering from a first heated drying cylinder onto a leading cylinder and from the leading cylinder further onto the next heated drying cylinder. A drying group consists of a number of subsequent groupings of cylinders, whereby, in each grouping ...

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Paper Machine Drying Hood | Runtech Solutions for Paper

Paper Machine Drying hood RunEco Solution. A good closed dryer hood is the key to an overall optimization of the dryer section ventilation. The features of the closed hood covering a multi-cylinder dryer section of a paper machine will have an extensive impact, not only on several production efficiency parameters but also on the overall working ...

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DryOnyx H release coating for drying and cooling cylinders ...

ŸValmet ValCar T4 tending doctor blades are recommended for situations where special cleaning and improved doctoring are required. T4 blades are also recommended for short-term usage. ŸA blade thickness of 1.5 mm (1/16") is preferable ŸSelf-proling holders (LiteCompact) are recommended e-mail: [email protected], ...

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Valmet steel dryer cylinders

Valmet cylinder coatings. Benefits ... These properties enable efficient heat transfer during the drying process and the drying capacity is higher with the same steam pressure than with cast iron cylinders. Valmet steel dryer cylinders Technical information ... ŸApplicable for all paper machine widths

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US4625430A - Drying section and method in paper machine ...

A multi-cylinder drying section and method in a paper machine wherein the paper web to be dried is guided into contact with the surfaces of heated drying cylinders wherein the drying fabric is cooled as it travels from one drying cylinder to the next. According to one embodiment, preferably used in the first group or groups of drying cylinders, a single-fabric draw is used wherein the web is ...

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Paper Machine Dryer Section - Paper Mill Drying Sections ...

Paper Machine Dryer Section Even after passing the paper from entire Press Section, Paper remains still wet hence it requires to eliminate remaining water which can only be done through the application of heat. This is carried out by Paper Machine Drying section consist of a series of steam heated cylinders varying in diameter.

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Classic Hydro-Dry® - valmet

Valmet's classic Hydro-Dry is a compact dryer for spunlace and wetlaid nonwoven lines which features an integrated air drying system, economical construction and easy installation. The system is designed to provide optimum, cost-effective drying solutions.

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Paper Mill Equipment, Paper Machines, Used Surplus and New

Papermill is a vendor to the pulp and paper industry. Our paper equipment and machine listings are regularly updated to give paper makers access to current information on new, used and surplus paper manufacturing equipment. Our specialty is the brokerage and sale of paper machines and major paper machine components.

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Pocket ventilating apparatus for a multi-cylinder dryer of ...

Sep 10, 1985· What is claimed is: 1. In apparatus for ventilating a pocket present in a multi-cylinder dryer of a paper machine, the multi-cylinder dryer including upper and lower rows of drying cylinders wherein a web runs from cylinders in one row to cylinders in another row in open draws, guide rolls situated in spaces between adjoining drying cylinders, and at least one wire having a run guided by said ...

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Optimize paper machine drying energy with Valmet XT Control

Optimize paper machine drying energy with Valmet XT Control Cylinder drying and supply air heating account for 80% of thermal energy costs. Drying is the most energy-intensive process in the papermaking process accounting for 80% of thermal energy costs due principally to cylinder drying .

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Dryer Section Profile Studies

operation, without stopping the machine Benefits Do you know how well your drying process is operating? Suffering from dry web edges and uneven paper moisture profiles? Dryer section profile studies provide valuable insight into the operation of cylinder surface temperature profiles as

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