• Headbox Slice Opening Arrangement - DiVA portal

    In the tissue paper machine a headbox distributes the fiber-water suspension over the width of the machine and it is accelerated when exiting through an oblong nozzle called slice opening. To adjust the flow to fit different machine speeds and different paper qualities, the slice opening is adjustable by means of a slice opening arrangement.

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  • Automation And Control Of Pulp And Paper Processes

    A paper mill is composed of stock preparation and a paper machine. In a paper mill, the first phase of papermaking process is stock preparation. It guarantees that stock entering the paper machine is clean, well mixed and combined with additives. A paper machine (Figure 3) consists of a wet-end, a headbox, a wire, a press and a dryer

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  • Headbox Optimization - Industrial Automation and Control ...

    Headbox optimization solutions ensure the papermaking process gets off to the best possible start. It ensures proper cleaning, setup and adjustment of all components of the headbox such as actuator, slice lip and apron, enabling a significant reduction in profile variation.

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  • Automation And Control Of Pulp And Paper Processes

    A paper mill is composed of stock preparation and a paper machine. In a paper mill, the first phase of papermaking process is stock preparation. It guarantees that stock entering the paper machine is clean, well mixed and combined with additives. A paper machine (Figure 3) consists of a wet-end, a headbox, a wire, a press and a dryer

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  • Paper Machine Headbox, View Fully headbox with dilution ...

    Paper Machine Headbox. FOB Reference Price:Get Latest Price. $80,000.00 - $400,000.00 / Set ... edge flow device, headbox control system, positioning device, pressure pulsation attenuator, support stand and walkway. Hydraulic Headbox Outline Drawing ...

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  • Paper machine headbox | pulp paper mill

    Dec 16, 2017· The paper machine headbox is an equipment that supply very low consistency stock into the forming section uniformly. The formation and uniformity of the final paper product depends on the dispersion of the fiber and fillers.The furnish delivery system varies on the construction of the headbox.

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  • CA2150629A1 - Control of dilution lines in a dilution ...

    Pinch valves having a flexible, constrictable sleeve are used to control a dilution headbox for a paper making machine. A variety of pinch valves may be used in the present invention with the pinch valves being actuated by pneumatic or hydraulic pressure or by mechanically pinching the valves' sleeves by means of rams driven by stepper or linear drive motors.

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  • Paper Machine Air Cushion Headbox - YouTube

    Air cushion headbox for decorative paper. 0086 138 846 22373 (whatsapp ID, wechat ID) Contact Person; Chris Wang

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  • PAPERMAKING - Pulp and Paper Technical Association of Canada

    A hydraulic headbox is the design commonly installed on modern paper machines. This type of headbox has no air pad or perforated rolls. Instead, the flow from the manifold and tube bank discharges into a stilling chamber, which is substantially smaller than the plenum of the air-pad headbox and thus avoids the structural problems that limited the

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  • Design & Development of Robust Control for Paper Making ...

    The objective of this paper is to control pulp total head & pulp stock level of a paper making headbox system. A physical modeling of headbox is made based on a general laws of control. Due to the wide range variations of pulp stock and dilution water in the headbox, the system dynamics change considerably. The different strategies for total head and stock level control are presented in this ...

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  • Paper machine headbox | pulp paper mill

    12/16/2017· The paper machine headbox is an equipment that supply very low consistency stock into the forming section uniformly. The formation and uniformity of the final paper product depends on the dispersion of the fiber and fillers.The furnish delivery system varies on the construction of the headbox.

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  • Paper Quality Control and Pulp Consistency Measurement ...

    This module provides a number of control functions that directly affect the quality of products: managing the concentration of machine pool that allows you to stabilize the quality of the pulp that is fed to the paper machine (cardboard machine), the control of the headbox, maintaining the level in the headbox, jet pressure control that was ...

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  • Monitoring pH at the Headbox - Yokogawa Electric

    value is required to obtain optimum overall results. Effective measurement and control of pH at the headbox requires equipment that can stand up to the abrasive components of the stock pulp. T he headbox is the first wet end component of the paper machine and has high levels of suspended solids, making the pH measurement difficult

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  • De-aeration - ANDRITZ

    Complete deaeration of pulp ahead of modern, high-speed paper and board machines is a necessity. Pressure drops and micro-turbulence in the headbox release dissolved gas into entrained air bubbles. ANDRITZ's experience with more than 900 deculator installations shows conclusively that complete removal of all free and bound air adhering to ...

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  • 1. Introduction

    Figure: Multi-layer Headbox . It is possible to make multi-layered sheets of paper using multi-layer headboxes. In a multi-layer headbox different stock can be put together for the top, middle and bottom. Of course this requires separate CD distributors for each layer. The bending stiffness as well as the thickness along the vanes is important.

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  • US3619360A - Basis weight control system for a papermaking ...

    A machine for making a continuous web of paper, said machine including a web forming section, a headbox and a basis weight valve for varying the flow of heavy stock to said headbox subsequently delivered to said web forming section via said headbox, a system for controlling the final basis weight of said paper web comprising means providing a ...

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  • US3135652A - Liquid level control for a pressurized ...

    United States Patent Ofliice LIQUID LEVEL CONTROL FOR A PRESSURIZED HEADBOX OF A PAPER-MAKING MACHINE Robert E. Smith, Hudson Falls, N.Y., assignor to The Sandy Hiil Iron & Brass Works, Hudson Falls, N.Y., a corporation Filed Aug. 17, 1962, Ser. No. 217,729 1 Claim.

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  • (PDF) Optimal digital control of a laboratory-scale paper ...

    Optimal digital control of a laboratory-scale paper machine headbox

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  • Voith | Voith Paper

    It combines the machine control system, process control system, quality control system, motors and drive control system with a universal and open automation system. Voith Automation solutions make a vital contribution to a continuously high paper quality and productivity of paper production lines.

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  • Papermaking Best Practices With Vacuum-Dewatering .

    11/29/2017· These findings are quickly confirmed with a table drainage study. It is not unusual to find that one low vacuum element is unknowingly removing 10-30 percent of the total headbox flow. Two common problems found with these systems are lack of vacuum measurement and control, and exceeding physical vacuum or hydraulic limits of early vacuum elements.

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  • 1. Introduction

    The fourdrinier paper machine is a horizontal table consisting of a solid breast roll near the headbox and a couch roll at the other end. The wire rotates between the breast roll and the couch roll. A forming board is placed after the breast roll to support the wire as the stock meets the wire. Drainage elements which aid in removing water are

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  • Foam & Entrained Air (Troubleshooting Guide)

    Foam (Entrained air, Visible foam) Air that is present in papermaking stock or white water can cause various kinds of problems, including pin-holes, circular marks on the paper, reduced dewatering rates, unsightly foam, deposit problems related to foam buildup, and loss of solid material due to overflow of foam from tanks and chests.

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

    "Paper Machine Design and Operation--Descriptions and Explanations" By Gunnar Gavelin 2.4 Acceleration of Flow in the Headbox 20 2.5 Fiber Angle 21 2.6 Dilution Control 22 Voith Module Jet 23 Beloit System 25 Valmet system 26 2.7 Precision Demands on Headbox Surfaces 28 2.8 Hydraulic Headbox Developments 28 Beloit converflo 30 2.9 Multichannel ...

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  • Headbox Optimization - Industrial Automation and Control ...

    To enhance the performance of a paper machine, it is important to minimize the number of rejected and de-valued products. Such losses are the result of limited mechanical control of the headbox. Honeywell's professional headbox optimization services address these .

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  • Control system for papermaking machine headbox - Centre ...

    Feb 22, 1983· This invention concerns the control of the operation of a paper machine headbox. By headbox it is meant the device which assures the projecting of a paper pulp onto a wire or between wires at the front end of a paper machine, whether said device actually has the appearance of a box or whether it has any other shape, such as for instance that of a plurality of channels, namely a so-called ...

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  • Measuring Paper Machine Performance

    Paper Machine Performance Guidelines TIP 0404-47 Has 15-20 good performance guidelines for linerboard, corrugating medium, fine paper, newsprint, Kraft paper, bleached board, and recycled paperboard. Explains the guidelines and provides suggestions for .

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  • pH & Consistency Control for Paper Machine Stock

    The main goal of a paper or board machine stock system is to consistently supply the desired mixture of fibers, fillers, chemicals, and water to the paper or board making process. As part of this goal, it is important to control two stock variables - pH and consistency.

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  • Optimum control of a paper making machine headbox ...

    Jun 01, 2002· To demonstrate the effectiveness of the optimum design procedure presented herein, a model of a paper making machine headbox was considered. The objective of the study was to produce improved regulation with compensatory increases or reductions in head level for output flow changes, with no overshoot condition.

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  • Designing Paper Machine Headbox Using GA: Materials and ...

    A non-smooth biobjective optimization problem for designing the shape of a slice channel in a paper machine headbox is described. The conflicting goals defining the optimization problem are the ones determining important quality properties of produced paper: 1) basis weight should be even and 2) the wood fibers of paper should mainly be oriented to the machine direction across the width of the ...

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  • The Pulp and Paper Making Processes

    the ''wet end* of the paper-forming machine. In the paper making process, the dilute stock passes through a headbox that distributes the fiber slurry uniformly over the width of the paper sheet to be formed. The "web" of fiber that will make the new paper sheet is formed on a continuously moving

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  • Designing Paper Machine Headbox Using GA | Request PDF

    Design of CD control of paper machine through multivariable problem, Optimal minimum control effort for a Fourdrinier machine headbox in [40]. An adaptive model predictive control of consistency ...

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  • Microbes in the Papermachine Environment

    C Paper Machines 122 o F50 o C Starch Vats 140 o F60 o C Thermophiles 158oF70oC Board machines 176 o F80 o C o o HtS i PaperCon 2011 Page 2316. ... Machine surfaces • Headbox ... Microbial Control ProgramMicrobial Control Program

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  • Papermaking OVERVIEW AND INTRODUCTION 1. Introduction and ...

    drawn off over the width of the paper machine into the headbox. Stock leaving the headbox is made into a sheet by filtration. The fibrous mat is called a wet web, which is pressed, dried, and wound into a reel of paper on the paper machine. Paper machines may vary in width from about 5 to over 30 feet, and operate at speeds up to 1800 m/min.

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  • Flow Control of a Hydraulic Headbox of Papermaking Machines

    study their control. A papermaking machine consists of five parts: a headbox, a wire, a press, a dryer, and a calender and reel. The headbox, from which pulp suspension is jetted out, as shown in Fig. 1, is the most important part for papermaking. It controls the flocculation of pulp fibers and jets out pulp liquid in .

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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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