• Effect of operating parameters on the drying performance ...

    The drying performance of multicylinder dryer section in a paper machine was investigated under various operating parameters: Inlet paper solid content (48–50%), inlet paper temperature (45–50°C), supply air temperature (100–90°C), and exhaust air humidity (75–85 g H 2 O/kg dry air). The variation in environmental conditions was also considered.

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  • Machine Vision Applications for Pulp and Paper Mills ...

    Beyond Web Inspection and Monitoring systems – Procemex intelligent cameras that increase paper-making efficiency. Paper machines and pulp dryers typically have a healthy number of cameras monitoring the product as it goes through the various parts of the machine to analyze sheet breaks or other product or process variation made visible by the monitoring cameras.

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  • 3 Pressing - AstenJohnson

    The press section is the next part of the paper machine after the forming section. The most important functions of pressing are to increase sheet solid consistency in order to ensure adequate drying capacity, to consolidate the sheet, and enable web runnability in the early dryer .

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  • Best Practice Lubrication for Paper Machines

    A dryer section might have several kinds of rolls, three of which are described here (Figure 4). Figure 4. Traditional Dryer Section. First, there are drying cylinders that carry the paper web and are heated by steam. Depending upon the product and the machine's speed, the temperature of the steam used to heat drying cylinders varies.

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  • Inspection, Repair, and Alteration of Yankee Dryers

    Considered as parts of papermaking machines, they are critical to an industry which produces about 300 million metric tons of paper each year. A typical Yankee dryer is a cast-iron cylinder of about 6 m (19.5 ft) outside diameter, 7.75 m (25.5 ft) width, and weighing about 180 t (200 short ton).

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  • Terminology On Paper & Pulp: Types of Paper and ...

    4 Paper Products and Containerboard Glossary B Flute A flute that is approximately 0.097 inches high. There are 47 ± 3 flutes per foot. Base Paper (Body Stock) The base stock for plain or decorated coated papers and boards. It may be uncoated or precoated on the paper machine.

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  • OPTIMIZATION FOR ENERGY CONSUMPTION IN DRYING .

    system of a paper machine is basically a heat exchanger network that transfers energy from the humid exhaust air of the dryer section to various process streams [5]. A typical paper machine heat recovery system set-up is presented in fig. 1 [6]. As shown the humid exhaust air from the * Corresponding author, e-mail: [email protected]

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  • Drying Section Optimization

    Drying Section Optimization PM drying section optimization improves process The EV Group (EVG) is a team of specialists providing customized services and technologies to op-timize paper machine runnability, process efficiency, and paper qua-lity. EVG is specialized in solving PM operational bottlenecks and problems. They offer tailored

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  • Dryer Section Control in Paper Machines During Web Breaks ...

    Dryer Section Control in Paper Machines During Web Breaks Abstract Web breaks in the dryer section of a paper machine cause loss of production and quality problems. After a web break, the steam pressure in the cylinders must be reduced to avoid overheating. The goal of this project is to determine optimal

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  • Improvement of Dryer Section Heat Recovery in Existing ...

    This paper examines the improvement of dryer section heat recovery in operating paper machines. Research has previously been focused on the design of new installations whereas defects in operating ...

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  • 3b Paper Machine Steam Systems Part2 - SlideShare

    Dec 13, 2009· The dryer section Moist air (to heat recovery) Exhaust fan Hot air Paperboard Paperboard Air/steam battery Air supply fan Dryer hood 3. Dryer section air systems Moist air (to heat recovery) Exhaust fan Hot air Paperboard Paperboard Air/steam battery Air supply fan Dryer hood Temperature variable According to machine, paper type and quality

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  • Dryer Section of Paper Machine | Scientific.Net

    Abstract: In paper dryer section of the paper machine, paper dehydration is small, but the steam consumption for the process of dehydration is very large, this steam consumption has a great influence to the total steam consumption of the whole papermaking process.

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  • Paper Machine - an overview | ScienceDirect Topics

    The dryer section of a paper machine removes between 1.1 and 1.3 kg of water per kg of paper compared with 200 and 2.6 kg in the forming and press sections, respectively. It is significantly more expensive to remove this water than for any other section of the machine. The relative costs of dewatering are: forming section 10%, press section 12% ...

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  • Paper machine - Wikipedia

    The dryer section of the paper machine, as its name suggests, dries the paper by way of a series of internally steam-heated cylinders that evaporate the moisture. Steam pressures may range up to 160 psig. Steam enters the end of the dryer head (cylinder cap) through a steam joint and condensate exits through a siphon that goes from the internal ...

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  • Dryer section | Paper machinery-paper making machine,paper ...

    The dryer section of the paper machine, as its name suggests, dries the paper by way of a series of internally steam-heated dryer cylinder that evaporate the moisture. Steam pressures may range up to 160 psig. Steam enters the end of the dryer head (cylinder cap) through a steam joint and condensate exits through a siphon that goes from the internal shell to a center pipe.

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  • PAPERMAKING - PAPTAC

    The operations involved in converting fibers (see Paper: Pulping and Bleaching, Pulp and Paper Sources: Non-wood) and other materials (see Paper: Non-fibrous Components) into a sheet of paper or paperboard are collectively known as papermaking. Paper having a width up to 10 m is manufactured on a continuous basis on paper machines as long as 150 m.

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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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  • Dryer section in paper making process - YouTube

    Jun 08, 2017· :Dryer Cylinder is on hot sale in Leizhan paper machinery, paper production process is mainly a dehydration procedure in paper making industry, the paper aft...

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  • Breaks of the Web (Troubleshooting Guide)

    Breaks of the paper web (Dry-end, Size press, Wet-end) BREAKS of the paper web can have various causes, many of which have little to do with wet-end additives. For instance, the drives of the paper machine may be unstable or poorly adjusted. Some detective work may be needed to determine why the paper web is breaking.

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  • Dryer Section - Bellmer

    Drying paper efficiently with the TurboDryer drying section is easy. We take care to create paper and board drying sections exactly to the needs of your product. Our specialists design, customize and manufacture in Finland our drying sections to reduce energy consumption as much as possible.

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  • Papermaking PAPERMACHINE – PRESSING 1. INTRODUCTION

    dryness of the sheet entering the dryer section. It has a major impact on the structure and runnability of the paper and thus the operating efficiency of the machine (Wahlstrom, 1969). The dewatering capacity of a press section and the properties of paper depend on the design and the number of nips.

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  • Dryer section in paper making process - YouTube

    :Dryer Cylinder is on hot sale in Leizhan paper machinery, paper production process is mainly a dehydration procedure in paper making industry, the paper aft...

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  • Modeling and Control of the Paper Machine Drying Section ...

    The topic of this thesis is modeling and control of the last part of the paper machine – the drying section. Paper is dried by letting it pass through a series of steam heated cylinders and the evaporation is thus powered by the latent heat of vaporization of the steam. The moisture in the paper is

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  • Papermaking PAPERMACHINE – PRESSING 1. INTRODUCTION

    dryness of the sheet entering the dryer section. It has a major impact on the structure and runnability of the paper and thus the operating efficiency of the machine (Wahlstrom, 1969). The dewatering capacity of a press section and the properties of paper depend on the design and the number of nips.

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  • Modeling and Control of the Paper Machine Drying Section ...

    The topic of this thesis is modeling and control of the last part of the paper machine – the drying section. Paper is dried by letting it pass through a series of steam heated cylinders and the evaporation is thus powered by the latent heat of vaporization of the steam. The moisture in the paper is

    Get price
  • Drying Section Optimization

    Drying Section Optimization PM drying section optimization improves process The EV Group (EVG) is a team of specialists providing customized services and technologies to op-timize paper machine runnability, process efficiency, and paper qua-lity. EVG is specialized in solving PM operational bottlenecks and problems. They offer tailored

    Get price
  • (PDF) New developments in paper and board drying

    After more than a century of incremental im-provements, but no major development, paper dry-ing is a slow operation, carried out on the largest and most expensive section of the paper machine.

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  • Dryer Section of Paper Machine | Scientific.Net

    Abstract: In paper dryer section of the paper machine, paper dehydration is small, but the steam consumption for the process of dehydration is very large, this steam consumption has a great influence to the total steam consumption of the whole papermaking process.

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  • Troubleshooting roll defects - causes and corrective actions

    While the defect is normally in the cross machine direction, the fiber separation is in the machine direction. It is often visible at the edge of the roll, appearing as a stickout or offset. Winding too tight : This causes wound-in tension to exceed the ultimate strength of the paper.

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  • Improved Energy Efficiency in Paper Making Through ...

    Energy Use on the Paper Machine • Paper machines use between 50% and 80% of mill energy (when there are no pulp mills on site) • Some of this is electrical energy used in drives and in running vacuum pumps and stock pumps (for moving fluids) • But steam used in drying the sheet is the biggest energy consumer • Water content of the sheet:-when sheet is just formed, 99.1% is water ...

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  • Paper Machine Failure Investigation: Inspection ...

    In April 1989, four dryer cans in a vintage paper machine manufactured about 1914 by Pusey Jones Corporation failed. The investigation of the accident determined that the root cause of the failure was a torsional fatigue crack that initiated on the OD surface of one of the cans. ... The defect indications in pieces 13, 22, 24, 25 and 26 were in ...

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  • "Estimation of dewatering intensity of the paper web in ...

    dewatering efficiency of the paper web in the wet part of the paper machine. Most drainage on a paper machine occurs mechanically on the wire and press sections. When the dry solids content of a web after the paper machine press section is approximately 50% (1 g dry solids/g H 2 O) for example, the dryer section removes less than 1% water ...

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  • Papermaking - Formation of paper sheet by machines ...

    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. Paper machines may vary in width from about 1.5 ...

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About us

Founded in 1982, Dekelon Paper Making Machinery Co.,Ltd. has always striven to meet and exceed customer expectations and continue to update and improve...

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