• Thermodynamic and Heat Transfer Evaluation of Pocket ...

    the paper machine drying section based on the mass and energy balance relationships written for paper, steam, moisture and cylinder dryer [19-21]. The simulation models can be utilized to evaluate the energy efficiency and heat recovery performance in the drying section of paper machines. Sivill et al. have developed a

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  • Voith | Dryer section

    In the dryer section, the remaining water is evaporated by the supply of heat energy. In this case the paper web is led over dryers that are heated from the inside by means of steam. At the end of the drying process, the paper has a residual moisture of approximately 2% to 9 % depending on the grade.

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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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  • Paper Machine Drying - Convergence Training

    On conventional paper and board machines, the energy required to dry the sheet to the desired moisture target at the reel is supplied by a series of rotating, steam-heated, dryer cylinders. These cylinders, or "cans," are grouped into multiple drive sections, which go progressively faster in order to adjust for machine direction stretch and to ...

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  • Drying in paper industry - Efficiency Finder

    The paper machine is actually a large dewatering device consisting of a headbox, a wire section, press section and dryer section. The most common machine design to date is the Fourdrinier forming process in which the sheet is formed onto a continuous horizontal wire or fabric onto which the suspension of fibres is supplied from the headbox.

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  • Voith dryer section optimization product SteamJoints for ...

    Jun 11, 2019· SteamJoints are steam joints with stationary siphons. They reliably dewater at the lowest differential pressure. Costs can be lowered due to low consumption ...

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  • Dry end of the paper machine | Scan Machineries

    paper technology menu toggle. complete machine menu toggle. fine paper; packaging paper; board paper; specialty paper; tissue paper; wet lap; wet end menu toggle. headbox menu toggle. hydraulic headbox; pressurized headbox; open type headbox; breast roll shaker; drainage elements; wire section menu toggle. fourdrinier menu toggle. twin wire ...

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  • [PDF] A Modelica Library for Paper Machine Dryer Section ...

    Following increased efforts during the last decade to formulate mathematical models for the paper drying process, this paper presents a Modelica library, DryLib, which enables users to rapidly develop complex models of paper machine dryer sections. In addition, parameter optimization, model reduction and moisture control by means of Non-Linear Model Predictive Control is treated.

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  • Modeling, Calibration and Control of a Paper Machine Dryer ...

    A paper machine dryer section model can be assembled using very few basic component types. In essence, there are only two fundamental entities, namely a steam heated cylinder and a sheet of paper. These two component types may then be combined, in large numbers, into a complete dryer section model. However, it is con-

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

    The dryer section of a conventional paper machine consists of from 40 to 70 steam-heated drying cylinders. After passing around the cylinders, the sheet is held in intimate contact with the heated surfaces by means of dryer felts. Until recent years, relatively heavy, ...

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  • 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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  • Multiply Paper Machine & Stock Preparation Area | Solenis

    6 - Dryer Section The pulp slurry used to produce paper enters the paper machine as a blend of 99% water and 1% fiber. While gravity, vacuums and the press section help to remove about 50% of the water from the sheet, the dryer section uses heated cylinders to reduce the .

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  • Papermaking OVERVIEW AND INTRODUCTION 1. Introduction .

    The press section mechanically squeezes water from the wet web, increasing the solids content of the sheet of paper. It also reduces the bulk or thickness of the paper. This compaction assists in subsequent bonding of fibres. 2.6 The Dryer . Paper leaves the press section and enters the dryer at a .

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  • OPTIMIZATION FOR ENERGY CONSUMPTION IN DRYING .

    300 tonne per day of fluting paper. The dryer section has 35 cylinders. The steam system is di-vided into three steam groups and the pressure of steam fed to the machine is 6 bars. As shown in fig.2, there are two heat recovery structures in the dryer section, one at .

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  • Process Parameters Optimization for Energy Saving in Paper ...

    In order to improve the energy efficiency of the paper machine dryer section, deeper analysis and optimization of process parameters are necessary. A NLP optimization method is developed for integration of steam system and air system to reduce the steam consumption and decrease the loads of centrifugal blowers in the multicylinder dryer section ...

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  • Paper machine drying | Valmet

    Valmet's dryer sections feature optimized steam consumption with effective ventilation and heat recovery for energy-efficient operation. As the efficiency of the entire machine is affected by the runnability of the dryer section, open draws are minimized and the wet web is well supported at the beginning of the dryer section.

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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.

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  • Drying in paper industry - Efficiency Finder

    The paper machine is actually a large dewatering device consisting of a headbox, a wire section, press section and dryer section. The most common machine design to date is the Fourdrinier forming process in which the sheet is formed onto a continuous horizontal wire or fabric onto which the suspension of fibres is supplied from the headbox.

    Get price
  • OPTIMIZATION FOR ENERGY CONSUMPTION IN DRYING .

    heat recovery systems in paper machines [11]. In 2011, Li and his co-workers developed a NLP method for integration of steam and air systems to parameter optimization of the energy usage in a multi-cylinder dryer section of a newsprint and liner board machine. In order to analyze the modeling, the dryer section

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

    The dryer section of a conventional paper machine consists of from 40 to 70 steam-heated drying cylinders. After passing around the cylinders, the sheet is held in intimate contact with the heated surfaces by means of dryer felts. Until recent years, relatively heavy, ...

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  • Paper Mill Dryer Section at Best Price in India

    Our company has gained immense accolades in the field of offering Paper Machine Dryer Section to the clients. This product is manufacture by skilled team of professionals using superior quality raw material and sophisticated manufacturing techniques. Paper Machine Dryer Section is .

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  • A new perspective on steam energy in the dryer section ...

    Paper machine dryer sections consume large amounts of steam energy. And while significant time and effort is devoted to measuring and evaluating dryer section efficiency, traditional measures provide limited insight into the energy efficiency of the dryer section.

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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.

    Get price
  • Papermaking/Raw materials - Wikibooks, open books for an ...

    Apr 04, 2018· History of paper; Raw materials. Fibres for paper; Water; Fillers and retention; Colours and whiteness; Sizing and wet strength; Paper production. Waste paper preparation; Fibre and auxiliary chemicals preparation; Paper machine; Wet end; Press section; Dryer section; Finishing; Process control; Types of paper. Graphic papers; Packaging papers ...

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  • Cans And Section - Dryers - Paper machine & component

    valmet paper machine dryer section - 50 dryers valmet - face: 374" - dia: 70" - 72 psi . sku 10170-1017 . 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) ...

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

    and Deutsch, 1999G. Principles for analyzing dryer section steam and condensate systems is treated in FHill, 1993G. 2.1 The paper machine The main purpose of a paper machine is to produce paper quicklywhile also keeping a constant quality. Today, paper machines run at speeds up to 2000 m min and with 10 m wide cylinders.

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  • Toscotec | Products - Paper&Board machines: Drying section

    In the case of a new paper machine it is possible to use fewer dryers, which clearly results ( IMMAGINE ) in a reduced investment cost and space with reduced investment in the building. As a rebuilding tool when upgrading an existing paper machine, there is significant increased drying capacity when simply replacing the cast iron dryers without ...

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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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  • Pocket ventilation system in dryer section of paper ...

    Jul 07, 2015· After the dryer section 5% to 6% moisture content is present in the paper web [1]. The dryer section of paper machine has nearly 1/3rd part of investment and operating cost and it .

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  • US8429832B2 - Utilization of waste heat in the dryer ...

    The dryer section of a paper machine consists of a steam-heated dryer and a high-temperature hood heated by steam or gas and located above the dryer. The dryer is generally operated with steam pressures between 1 and 10 bar, and the blow-air temperature of the high-temperature hood is usually between 250° C. and 700° C. ...

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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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