Dewatering from the Fourdrinier This is a relatively small module but justified by the ever increasing cost of energy. Although very real commodities, neither Energy nor Vacuum can be seen. These invisible commodities have to be explained at a conceptual level. Any concept is …
More DetailsVooner is a design and manufacturing company of paper and fabric dewatering equipment for paper machines. In 1981, the foundation of VPM was developed to provide rugged vacuum boxes and oscillating showers to clean the newer technology man-made fiber paper machine fabrics. Vooner FloGard ® Corporation acquired the core of VPM in 2003 from Nash ...
More DetailsCoarse dewatering: High throughput with low residual moisture VACUUM BELT FILTER This unit is ruggedly designed to operate in the most demanding applications. It operates under continuous vacuum to enhance solid/ liquid separation. Designed for ease of operation, the filter also has all wear parts easily accessible for maintenance.
More Details· Vacuum dewatering is widely used in dewatering of pulverized coal, mineral powder, pulp, alkali, dyes, rubber and cement. Coal Washery in coal industry uses liquid ring vacuum pump and filter to suck water in the slurry water, so as to get dry slurry (filter cake), which is the most typical and widespread example in the application of liquid ring vacuum dewatering.
More Detailsdewatering by structural differences in forming fabrics. In Paper Conference and Trade Show (PaperCon 2016). Cincinnati, Ohio: TAPPI Press, pp. 767–776. Paper III Sjöstrand, B., Barbier, C. & Nilsson, L. Modeling of forming fabric structure influence on vacuum box dewatering. Manuscript submitted.
More DetailsENHANCED VACUUM DEWATERING OF PULP: JPS6440691A: 1989-02-10: Other References: Smook, G.A., Handbook for Pulp and Paper Technologists, pp. 41-43 (1992). Primary Examiner: HUG, JOHN ERIC . Attorney, Agent or Firm: NALCO COMPANY (Eagan, MN, US) Claims: We claim: 1. A method of dewatering an aqueous cellulosic pulp slurry comprising a) adding to ...
More Details· Characterizations of the morphology, dewatering speed, sedimentation, laser light scattering, scanning electron microscopy of cellulose suspensions, and light transmittance of resin-impregnated films showed that the fibrillation degree of the pulp was enhanced with a …
More Details• Flocculation, dewatering, drying, wet and dry sheet strength, formation, smoothness Cameras for floc size measurement Light source Headbox Specifications • Forming speed 0.5 m/s - 3 m/s • Width of web 10 cm • Grammage 30 – 100 g/m2 4 vacuum boxes
More Detailsand to measure dewatering properties on wire, press and drying sections of a paper machine. The xylanase treatment slightly increased the pulp freeness indicating improved pulp drainage properties. At the moving belt former, however, no significant changes that would indicate enhanced dewatering in forming were observed.
More DetailsFull Article. Dewatering of Softwood Kraft Pulp with Additives of Microfibrillated Cellulose and Dialcohol Cellulose. Björn Sjöstrand, a, * Christophe Barbier, b Henrik Ullsten, a and Lars Nilsson a The addition of nano- and micro-fibrillated cellulose to conventional softwood Kraft pulps can enhance the product performance by increasing the strength properties and enabling the use of less ...
More DetailsUS6706144B1 - Method of dewatering pulp - Google Patents Method of dewatering pulp Download PDF Info Publication number US6706144B1. US6706144B1 US10/174,230 US17423002A US6706144B1 US 6706144 B1 US6706144 B1 ...
More DetailsTheory of dewatering in forming The dewatering paradox. •Vacuum @ suction boxes: ‐50% •Dryness @ couch roll: + 0,8% •Steam pressure ‐0,5 bar Results: •Vacuum reduction •Steam saving •Kw/h drive load reduction •Higher dryness @ couch •Higher fabric & foils life 6 hours Dry content when changing the vacuum settings in %
More Details· Screw press dewatering of citrus pulp is practised in the industry to yield a higher dry matter pulp and a liquid fraction high in soluble solids. ... At this stage a vacuum step may be introduced to further reduce the moisture content. ... Enhanced electro-osmotic dewatering of fine particle suspension using a rotating anode.
More DetailsUse of Acid Preconditioning for Enhanced Dewatering of Wastewater Treatment Sludges from the Pulp and Paper industry Talat Mahmood1*, Allan Elliott'' ABSTRACT: In municipal and industrial practices, wastewater treatment sludges are generally conditioned with organic polymers before de watering.
More Detailsreported vacuum dewatering of titanium oxohydrate and. pyrite slurries that was enhanced electrokinetically through. application of a constant DC voltage cross the bed. [8] The.
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More Detailsmaximum vacuum levels due to the elevation of the flatbox separator above seal pits in the basement. Also, as vacuum airflow is concentrated with fewer flatboxes, vacuum separators and vacuum piping may become undersized. Besides improved dewatering with fewer flatboxes, less slot area, and higher vacuum, table drive horsepower is usually reduced.
More Detailsto how pulp stocks drain, they do not simulate the dynamic drainage conditions in the forming section of a paper machine. During the initial stage of dewatering in the forming zone of a paper machine, pressure and vacuum pulses are generated by forming foils and rolls. Each pressure pulse disrupts the web structure and opens water passages. The
More DetailsRoll dewatering was revolutionized in the early 1990''s with the introduction of double doctors and they quickly became an industry best practice. Natural vacuum behind the first blade in the double doctor system drew water out of the roll and the second blade uniformly removed any surface water and prevented it from ringing roll.
More DetailsDewatering of refined, bleached hardwood kraft pulp by gravity, vacuum, and centrifugation with applied pressure. Part 1. Physical and ionic effects: Date: 2007: Citation: Hubbe, M. A. (2007). Dewatering of refined, bleached hardwood kraft pulp by gravity, vacuum, and centrifugation with applied pressure. Part 1. Physical and ionic effects.
More DetailsGrammage 80 g/m2, Eucalyptus pulp, SR 030 with PCC ... vacuum dewatering efficiency, higher couch solids, cleaner running former PaperCon 2011 Page 2127. ... The CD-yarn density was altered for the enhanced sample in order to reach the same air perm. PaperCon 2011 Page 2128.
More DetailsVacuum dewatering is one of the intermediate stages of water removal on the paper machine where the compressible, wet mat is dewatered using applications of higher vacuum. ... fact that pulp ...
More Detailspulp ethoxylates dewatering surfactant Prior art date 2002-06-18 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires 2022-08-21 Application number US10/174,230 Inventor Gary S. Furman, Jr ...
More Details· The dewatering time in water and foam forming is presented in Fig. 5 as a function of the measured vacuum level. Dewatering starts when the pressure valve is opened and dewatering ends when the height of the water/foam column becomes zero. In water forming, the dewatering time was almost constant at all vacuum levels.
More DetailsWhether it''s fine particle wet classification and separation, slurry and sludge thickening and dewatering, chemical preparation and delivery systems, effluent water treatment or commercial water recycling, PHOENIX has enhanced the process flow and efficiency of processing plants around the globe since 1984. Markets. Aggregate.
More DetailsENHANCED VACUUM DEWATERING OF PULP: JP1040691A: 4039466: Hydroextracting composition for wet and finely pulverized ores: 4062721: Use of surfactant to increase water removal from fibrous web: 4198267: Improved pulp sheet formation: 4210531: Process for dewatering mineral concentrates: 4985162: Dewatering composition: 5395438: Mineral wool-free ...
More Detailsbetween 10 and 70 kPa. Vacuum levels are thus comparable with those used in real paper machine former sections. During sheet forming, in addition to the time evolution of vacuum, P(t), the time evolution of the position of the pulp surface, h(t),was measured with an ultra-sonic detector. SDS was used as the foaming agent for foam-laid ...
More Details· Already ten years ago scientific studies proved that vacuum dewatering is the best method in these cases. PulpEye''s Dynamic Drainage Analyser, DDA 5, is hence increasingly used by companies involved in nanocellulose development. "Nanocellulose is a hot research area and we have noticed that our DDA 5 is more and more used for drainage ...
More Detailsstand out due to their unprecedented dewatering capacities over the entire lifecycle. In addition to the most recent family addition, CellFlex VMax, there exists a broad range of pulp press fabrics. Their open structure offers high dewatering with lower vacuum levels and requires less chemical cleaning. Cell-
More DetailsDewatering Vacuum Pumps For Paper Machinery | Vooner
More DetailsEnhanced vacuum dewatering of pulp Family Cites Families (6) * Cited by examiner, † Cited by third party; Publication number Priority date Publication date Assignee Title; JPS5243477B2 (en) * 1974-03-20: 1977-10-31: US4107073A (en) * 1977-03-17: 1978-08-15: Nalco Chemical Company ...
More DetailsVACUUM FILTERS. Our polymers are uniquely formulated and produced to provide thebroadest product line to choose from. These dewatering aids are designed to promote rapid formation of dense, strong, shear-resistant floc that readily releases water. Depending on your particular operating conditions and operational goals, we can provide:
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