• Introduction to process and properties of tissue paper

    • Process and project engineer and then technical manager in oil industry (oil refineries and spent lube oil re-refining) in GULF, API, AGIP in Italy • Technical manager in chemical and consumer products company (soap, detergents, derivate from fatty acids, sanitary gloves, tissue paper) in Italy. • Since 1984 in paper and tissue business:

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  • Pilot Paper Machine for All Times

    White water system in FEX is the basic design of the white-water system that is closed material-wise, by recovering material from the excess white water using a disc filter and mixing it into the thick stock. This is still unique for a pilot paper machine and all the volumes involved are minimized, to reduce the time to equilibrium and after a ...

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  • Pulp and Paper Industry Wastewater and Water Treatment ...

    White Liquor. The solution of caustic and sodium sulfide is referred to as "white liquor". These chemicals, along with heat and pressure, release the lignin from the fibers in the wood. The resulting "pulp" is washed, screened, and sent on to bleaching and becomes the feed stock for the paper-making process.

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  • How to Manufacture Paper: Pulping Processes, Paper Making ...

    The wastewater generated in this section is known as white water and is recycled in the process to the extent of 80% for pulp washing in the poucher in most of the mills. Finished product is cut to size and ready for marketing. The moisture content of finished paper varies from 2-8% by weight with an average value of 4.5%. The flow sheet of the ...

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  • Mechanical Pulp - an overview | ScienceDirect Topics

    The white water systems of the paper machine can be coupled countercurrently to the white water system of the mechanical pulping process. This will reduce fresh water usage and water heating. Using warm water has other benefits, like quality and production improvements in the groundwood mill.

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  • Paper Machine Corrosion

    Typical Corrosive White Water Compositions PAPER MAKING ENVIRONMENTS Environment ACID-ALUM with SULFUR ACID-ALUM ALKALINE Typical Grade Newsprint, Linerboard, SC Fine Paper, Bleached Board, wood free grades Fine Paper, Bleached Board, pH 4.0 4.0 8.0 Temperature °C °F 60 140 55 130 50 122 Conductivity micro-siemens 4300 2100 1100 Chloride Ion ...

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  • Paper industry biocides - BASF

    Paper Mill Process Water Myacide AS can be dosed as a solid at a convenient point early in the recirculating system but experience has shown that best results are obtained using formulated solutions. It should be added to the wet end of the machine, the primary white water circuit, where good dispersion can take place. The levels required will ...

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  • Water Analysis Solutions for the Pulp and Paper Industry ...

    White Water pH Reducing production costs without impacting product quality is a key to profitability – and recycling white water is critical in minimizing production costs. Find out how accurate, reliable pH monitoring and management can deliver improved flocculation, conserve paper fibers, and condition water for reuse within the plant.

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  • Paper Machine Transition Troubleshooting from Stock ...

    grade furnish recipe is at the wet end for the start of the paper machine transition. • A change in the stock furnish percentages or amount of fiber refining may have a noticeable effect on the ability to remove water from the sheet and this will typically show up a main (upstream) as drying section steam pressure steady state change.

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  • White Water Treatment for Pulp and Paper Mills

    White water is filtered to separate fibers, fines and filler materials in order to provide a clean source of reusable water that meets operational and ecological requirements. Typically, a saveall or disk filter is used as a fiber recovery unit to recover fiber from the white water stream, while the filtrate requires additional treatment.

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  • Paper Dictionary

    A roll of paper, direct from the paper machine, wound on a machine winder spool as distinct from rolls that have been slit and rewound on cores. K White clay used as an additive and filler in paper and coating made up chiefly of minerals of the kaolinite type.

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  • The treatment of pulp and paper mill effluent: a review ...

    May 01, 2001· The pulp and paper making industry is a very water-intensive industry and ranks third in the world, after the primary metals and the chemical industries, in terms of freshwater withdrawal. It is believed (Kallas and Munter, 1994) that by the year 2000, the paper industry will be the largest manufacturing user of water.

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  • Paper Machine Approach | AFT

    Compared with conventional seal pits, silos and machine chest, POM's foot print is small - generally less than 5% in volume. Now just-in-time grade changes make sense, even for colored grades. For a greenfield system, the POM process can eliminate the machine basement - saving millions in permitting and environmental analysis.

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  • BROWN PAPER PROCESS FLOW ANALYSIS

    • A Brown Paper is a visual display of a process, series of processes and / or system, its strengths and opportunities • Brown Papers provide a picture of an entire process showing actual steps, decision points, documentation and interfaces • It is a process. The Brown Paper Process involves work

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  • China Paper Machine of White Water Recycling Multi Disc ...

    China Paper Machine of White Water Recycling Multi Disc Filter, Find details about China Paper Machine, Paper Making Machine from Paper Machine of White Water Recycling Multi Disc Filter - Zhucheng Tiangong Making Paper Machinery Co., Ltd.

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  • Properties of Pulp (Papermaking Pulp) - Pulp and Paper ...

    The method to find kappa # of pulp is described in TAPPI T236. Lignin in Pulp Commercial pulp range in lignin content from 1.0% for "soft cook" chemical pulp, about 8% for "hard cook" chemical pulp and up to 16% for semi-chemical pulp.In general lignin affects the properties of pulp in adverse manner.

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  • Papermaking OVERVIEW AND INTRODUCTION 1. Introduction .

    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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  • Paper Pulper Machines for Sale | CNBM

    Paper pulping machine. CNBM offers you the world class paper pulping machines including pulp cooking digester, vacuum drum washer, single screw press, twin roll press, disc filter, gravity disc thickener, blowing tank, heat exchanger, and replacement tank. Our products are all certificated with CE and ISO:9001, please purchase at ease.

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  • The Role of the Digester in Paper Making

    The Role of the Digester in Paper Making. The digester is a special piece of machinery used in the process of papermaking. Its purpose is to cook small wood chips for several hours in order to soften them. These softened chips are then passed to a machine that whitens them to the desired shade.

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  • How Paper Was Made

    The Longest Part Of The Paper Making Machine – The Steam Dryer Section. Fiber goes into the machine at 99% water, and leaves at 5%. Although gravity, vacuum, and the felt press work to dry the sheet out, they can not do the full job; hence the longest section of the paper making machine.

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  • Paper Machine Clothing Key To The Paper Making Process .

    paper machine clothing key to the paper making process Aug 18, 2020 Posted By James Michener Public Library TEXT ID f540b573 Online PDF Ebook Epub Library here the pulp mixture 995 percent water and 5 percent fiber is spread across the forming fabric which resembles a large mesh screen gravity and suction remove some

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  • Where can I find more information about white water pH in ...

    Aug 17, 2020· The drainage from wet pulp stock is called white water, regardless of its color or what stage of the process it came from. A pulp and paper plant can use up to 25,000 gallons of fresh water to produce a ton of paper, so it is imperative that plants recycle as much white water as possible.

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  • China Paper Machine of White Water Recycling Multi Disc ...

    China Paper Machine of White Water Recycling Multi Disc Filter, Find details about China Paper Machine, Paper Making Machine from Paper Machine of White Water Recycling Multi Disc Filter - Zhucheng Tiangong Making Paper Machinery Co., Ltd.

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  • The Ultimate Guide to Paper Recycling Process | World ...

    May 22, 2019· 29,000 liters of water. Paper Recycling Process. Whether you recycle your own paper or recycle paper on an industrial scale, the process is essentially the same. However, steps may be added or omitted in some cases, depending on the quality of the recovered paper, with thin lightweight newspaper requiring fewer steps than thick cardboard boxes.

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  • Paper through Time: Non-destructive Analysis of 14th ...

    Alfred Shorter, in his work on papermaking in England, cites "plentiful, pure and clear or 'fair' water" as one of the essential ingredients in producing white paper of good quality. 7 Separating process water from water used for power was an alternative, and often a routine necessity. A nearby spring might offer top-quality water for ...

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  • Stock and water systems of the paper machine

    paper mill water system: Short circulation: The system in which paper machine wire water is separated from the stock in web forming and used for dilution of the thick stock to be delivered to the headbox. Long circulation: The system in which excess white water from the short circulation and other

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  • Glossary - Nc State University

    A very large centrifugal pump, usually in the basement below a paper machine, that may dilute thick stock with white water and/or send thin stock to the headbox Fastness Resistance of a dyed material (e.g. paper) toward either light or fluids

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  • Water Reuse in Paper Mills

    produce paper. The use of fresh water has decreased significantly during the last decades and there are several reasons for this, such as: limited availability of fresh water, increased cost for effluent treatment and marketing benefits. This decreased consumption has been made possible by the reuse of process water instead of fresh water.

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  • Measuring Paper Machine Energy Performance

    A & B Paper Machine Energy Tracking B PM Current Values / 24 Hour Trends 50 3268 3.4 5.4 44.1 Machine Break Paper Grade # Basis Weight Reel Moisture Reel Speed Size Press Moisture Production Rate Machine Information lb/3300sq ft % % fpm tph 600 Total Steam Consumption Total Electricity Consumption Steam kWh/ton Electricity lb/ton Water ...

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  • Dewatering Vacuum Pumps For Paper Machinery | Vooner

    Dewatering fabric on a paper machine consumes energy to physically remove particles of water. If the vacuum pump is worn and airflow is down to 60% of original, energy and pump seal water is wasted and the white water must be removed thermally from the paper with steam in the dryer section to thermally vaporize the moisture at a much higher use ...

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  • Valmet to supply an extensive paper machine grade ...

    The scope includes broke collection system, white water system and modifications to the approach flow system. The delivery in the existing paper machine will include three new OptiFlo Foudrinier headboxes, modifications to forming, press, pre-drying and sizing sections.

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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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